diff options
Diffstat (limited to 'mesalib/src/mesa/main/renderbuffer.c')
| -rw-r--r-- | mesalib/src/mesa/main/renderbuffer.c | 5136 |
1 files changed, 2568 insertions, 2568 deletions
diff --git a/mesalib/src/mesa/main/renderbuffer.c b/mesalib/src/mesa/main/renderbuffer.c index 70011e6b2..08bb23cb3 100644 --- a/mesalib/src/mesa/main/renderbuffer.c +++ b/mesalib/src/mesa/main/renderbuffer.c @@ -1,2568 +1,2568 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5 - * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/** - * Functions for allocating/managing renderbuffers. - * Also, routines for reading/writing software-based renderbuffer data as - * ubytes, ushorts, uints, etc. - * - * The 'alpha8' renderbuffer is interesting. It's used to add a software-based - * alpha channel to RGB renderbuffers. This is done by wrapping the RGB - * renderbuffer with the alpha renderbuffer. We can do this because of the - * OO-nature of renderbuffers. - * - * Down the road we'll use this for run-time support of 8, 16 and 32-bit - * color channels. For example, Mesa may use 32-bit/float color channels - * internally (swrast) and use wrapper renderbuffers to convert 32-bit - * values down to 16 or 8-bit values for whatever kind of framebuffer we have. - */ - - -#include "glheader.h" -#include "imports.h" -#include "context.h" -#include "fbobject.h" -#include "formats.h" -#include "mtypes.h" -#include "renderbuffer.h" - - -/* - * Routines for get/put values in common buffer formats follow. - */ - -/* Returns a bytes per pixel of the DataType in the get/put span - * functions for at least a subset of the available combinations a - * renderbuffer can have. - * - * It would be nice to see gl_renderbuffer start talking about a - * gl_format instead of a GLenum DataType. - */ -static int -get_datatype_bytes(struct gl_renderbuffer *rb) -{ - int component_size; - - switch (rb->DataType) { - case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: - component_size = 8; - break; - case GL_FLOAT: - case GL_UNSIGNED_INT: - case GL_UNSIGNED_INT_24_8_EXT: - component_size = 4; - break; - case GL_UNSIGNED_SHORT: - component_size = 2; - break; - case GL_UNSIGNED_BYTE: - component_size = 1; - break; - default: - component_size = 1; - assert(0); - } - - switch (rb->_BaseFormat) { - case GL_DEPTH_COMPONENT: - case GL_DEPTH_STENCIL: - return component_size; - default: - return 4 * component_size; - } -} - -/* This is commonly used by most of the accessors. */ -static void * -get_pointer_generic(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLint x, GLint y) -{ - if (!rb->Data) - return NULL; - - return ((char *) rb->Data + - (y * rb->RowStride + x) * _mesa_get_format_bytes(rb->Format)); -} - -/* GetRow() implementation for formats where DataType matches the rb->Format. - */ -static void -get_row_generic(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, void *values) -{ - void *src = rb->GetPointer(ctx, rb, x, y); - memcpy(values, src, count * _mesa_get_format_bytes(rb->Format)); -} - -/* Only used for float textures currently, but might also be used for - * RGBA8888, RGBA16, etc. - */ -static void -get_values_generic(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], void *values) -{ - int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat); - GLuint i; - - for (i = 0; i < count; i++) { - const void *src = rb->GetPointer(ctx, rb, x[i], y[i]); - char *dst = (char *) values + i * format_bytes; - memcpy(dst, src, format_bytes); - } -} - -/* For the GL_RED/GL_RG/GL_RGB format/DataType combinations (and - * GL_LUMINANCE/GL_INTENSITY?), the Put functions are a matter of - * storing those initial components of the value per pixel into the - * destination. - */ -static void -put_row_generic(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const void *values, const GLubyte *mask) -{ - void *row = rb->GetPointer(ctx, rb, x, y); - int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat); - int datatype_bytes = get_datatype_bytes(rb); - unsigned int i; - - if (mask) { - for (i = 0; i < count; i++) { - char *dst = (char *) row + i * format_bytes; - const char *src = (const char *) values + i * datatype_bytes; - - if (mask[i]) { - memcpy(dst, src, format_bytes); - } - } - } - else { - for (i = 0; i < count; i++) { - char *dst = (char *) row + i * format_bytes; - const char *src = (const char *) values + i * datatype_bytes; - memcpy(dst, src, format_bytes); - } - } -} - -static void -put_mono_row_generic(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const void *value, const GLubyte *mask) -{ - void *row = rb->GetPointer(ctx, rb, x, y); - int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat); - unsigned int i; - - if (mask) { - for (i = 0; i < count; i++) { - char *dst = (char *) row + i * format_bytes; - if (mask[i]) { - memcpy(dst, value, format_bytes); - } - } - } - else { - for (i = 0; i < count; i++) { - char *dst = (char *) row + i * format_bytes; - memcpy(dst, value, format_bytes); - } - } -} - - -static void -put_values_generic(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *values, const GLubyte *mask) -{ - int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat); - int datatype_bytes = get_datatype_bytes(rb); - unsigned int i; - - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - void *dst = rb->GetPointer(ctx, rb, x[i], y[i]); - const char *src = (const char *) values + i * datatype_bytes; - memcpy(dst, src, format_bytes); - } - } -} - - -static void -put_mono_values_generic(struct gl_context *ctx, - struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat); - unsigned int i; - - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - void *dst = rb->GetPointer(ctx, rb, x[i], y[i]); - memcpy(dst, value, format_bytes); - } - } -} - -/********************************************************************** - * Functions for buffers of 1 X GLubyte values. - * Typically stencil. - */ - -static void -get_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLubyte *dst = (GLubyte *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - const GLubyte *src = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i]; - dst[i] = *src; - } -} - - -static void -put_row_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - const GLubyte *src = (const GLubyte *) values; - GLubyte *dst = (GLubyte *) rb->Data + y * rb->RowStride + x; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = src[i]; - } - } - } - else { - memcpy(dst, values, count * sizeof(GLubyte)); - } -} - - -static void -put_mono_row_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *value, const GLubyte *mask) -{ - const GLubyte val = *((const GLubyte *) value); - GLubyte *dst = (GLubyte *) rb->Data + y * rb->RowStride + x; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = val; - } - } - } - else { - GLuint i; - for (i = 0; i < count; i++) { - dst[i] = val; - } - } -} - - -static void -put_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], - const void *values, const GLubyte *mask) -{ - const GLubyte *src = (const GLubyte *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i]; - *dst = src[i]; - } - } -} - - -static void -put_mono_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - const GLubyte val = *((const GLubyte *) value); - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i]; - *dst = val; - } - } -} - - -/********************************************************************** - * Functions for buffers of 1 X GLushort values. - * Typically depth/Z. - */ - -static void -get_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLushort *dst = (GLushort *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_SHORT); - for (i = 0; i < count; i++) { - const GLushort *src = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; - dst[i] = *src; - } -} - - -static void -put_row_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - const GLushort *src = (const GLushort *) values; - GLushort *dst = (GLushort *) rb->Data + y * rb->RowStride + x; - ASSERT(rb->DataType == GL_UNSIGNED_SHORT); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = src[i]; - } - } - } - else { - memcpy(dst, src, count * sizeof(GLushort)); - } -} - - -static void -put_mono_row_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *value, const GLubyte *mask) -{ - const GLushort val = *((const GLushort *) value); - GLushort *dst = (GLushort *) rb->Data + y * rb->RowStride + x; - ASSERT(rb->DataType == GL_UNSIGNED_SHORT); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = val; - } - } - } - else { - GLuint i; - for (i = 0; i < count; i++) { - dst[i] = val; - } - } -} - - -static void -put_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], const void *values, - const GLubyte *mask) -{ - const GLushort *src = (const GLushort *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_SHORT); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; - *dst = src[i]; - } - } -} - - -static void -put_mono_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - const GLushort val = *((const GLushort *) value); - ASSERT(rb->DataType == GL_UNSIGNED_SHORT); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; - *dst = val; - } - } - } - else { - GLuint i; - for (i = 0; i < count; i++) { - GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; - *dst = val; - } - } -} - - -/********************************************************************** - * Functions for buffers of 1 X GLuint values. - * Typically depth/Z or color index. - */ - -static void -get_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLuint *dst = (GLuint *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_INT || - rb->DataType == GL_UNSIGNED_INT_24_8_EXT); - for (i = 0; i < count; i++) { - const GLuint *src = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i]; - dst[i] = *src; - } -} - - -static void -put_row_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - const GLuint *src = (const GLuint *) values; - GLuint *dst = (GLuint *) rb->Data + y * rb->RowStride + x; - ASSERT(rb->DataType == GL_UNSIGNED_INT || - rb->DataType == GL_UNSIGNED_INT_24_8_EXT); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = src[i]; - } - } - } - else { - memcpy(dst, src, count * sizeof(GLuint)); - } -} - - -static void -put_mono_row_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *value, const GLubyte *mask) -{ - const GLuint val = *((const GLuint *) value); - GLuint *dst = (GLuint *) rb->Data + y * rb->RowStride + x; - ASSERT(rb->DataType == GL_UNSIGNED_INT || - rb->DataType == GL_UNSIGNED_INT_24_8_EXT); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = val; - } - } - } - else { - GLuint i; - for (i = 0; i < count; i++) { - dst[i] = val; - } - } -} - - -static void -put_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], const void *values, - const GLubyte *mask) -{ - const GLuint *src = (const GLuint *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_INT || - rb->DataType == GL_UNSIGNED_INT_24_8_EXT); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLuint *dst = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i]; - *dst = src[i]; - } - } -} - - -static void -put_mono_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], const void *value, - const GLubyte *mask) -{ - const GLuint val = *((const GLuint *) value); - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_INT || - rb->DataType == GL_UNSIGNED_INT_24_8_EXT); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLuint *dst = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i]; - *dst = val; - } - } -} - - -/********************************************************************** - * Functions for buffers of 3 X GLubyte (or GLbyte) values. - * Typically color buffers. - * NOTE: the incoming and outgoing colors are RGBA! We ignore incoming - * alpha values and return 255 for outgoing alpha values. - */ - -static void * -get_pointer_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLint x, GLint y) -{ - ASSERT(rb->Format == MESA_FORMAT_RGB888); - /* No direct access since this buffer is RGB but caller will be - * treating it as if it were RGBA. - */ - return NULL; -} - - -static void -get_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, void *values) -{ - const GLubyte *src = ((const GLubyte *) rb->Data) + - 3 * (y * rb->RowStride + x); - GLubyte *dst = (GLubyte *) values; - GLuint i; - ASSERT(rb->Format == MESA_FORMAT_RGB888); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - dst[i * 4 + 0] = src[i * 3 + 0]; - dst[i * 4 + 1] = src[i * 3 + 1]; - dst[i * 4 + 2] = src[i * 3 + 2]; - dst[i * 4 + 3] = 255; - } -} - - -static void -get_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLubyte *dst = (GLubyte *) values; - GLuint i; - ASSERT(rb->Format == MESA_FORMAT_RGB888); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - const GLubyte *src - = (GLubyte *) rb->Data + 3 * (y[i] * rb->RowStride + x[i]); - dst[i * 4 + 0] = src[0]; - dst[i * 4 + 1] = src[1]; - dst[i * 4 + 2] = src[2]; - dst[i * 4 + 3] = 255; - } -} - - -static void -put_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - /* note: incoming values are RGB+A! */ - const GLubyte *src = (const GLubyte *) values; - GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x); - GLuint i; - ASSERT(rb->Format == MESA_FORMAT_RGB888); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - dst[i * 3 + 0] = src[i * 4 + 0]; - dst[i * 3 + 1] = src[i * 4 + 1]; - dst[i * 3 + 2] = src[i * 4 + 2]; - } - } -} - - -static void -put_row_rgb_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - /* note: incoming values are RGB+A! */ - const GLubyte *src = (const GLubyte *) values; - GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x); - GLuint i; - ASSERT(rb->Format == MESA_FORMAT_RGB888); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - dst[i * 3 + 0] = src[i * 3 + 0]; - dst[i * 3 + 1] = src[i * 3 + 1]; - dst[i * 3 + 2] = src[i * 3 + 2]; - } - } -} - - -static void -put_mono_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *value, const GLubyte *mask) -{ - /* note: incoming value is RGB+A! */ - const GLubyte val0 = ((const GLubyte *) value)[0]; - const GLubyte val1 = ((const GLubyte *) value)[1]; - const GLubyte val2 = ((const GLubyte *) value)[2]; - GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x); - ASSERT(rb->Format == MESA_FORMAT_RGB888); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - if (!mask && val0 == val1 && val1 == val2) { - /* optimized case */ - memset(dst, val0, 3 * count); - } - else { - GLuint i; - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - dst[i * 3 + 0] = val0; - dst[i * 3 + 1] = val1; - dst[i * 3 + 2] = val2; - } - } - } -} - - -static void -put_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], const void *values, - const GLubyte *mask) -{ - /* note: incoming values are RGB+A! */ - const GLubyte *src = (const GLubyte *) values; - GLuint i; - ASSERT(rb->Format == MESA_FORMAT_RGB888); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLubyte *dst = (GLubyte *) rb->Data + 3 * (y[i] * rb->RowStride + x[i]); - dst[0] = src[i * 4 + 0]; - dst[1] = src[i * 4 + 1]; - dst[2] = src[i * 4 + 2]; - } - } -} - - -static void -put_mono_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - /* note: incoming value is RGB+A! */ - const GLubyte val0 = ((const GLubyte *) value)[0]; - const GLubyte val1 = ((const GLubyte *) value)[1]; - const GLubyte val2 = ((const GLubyte *) value)[2]; - GLuint i; - ASSERT(rb->Format == MESA_FORMAT_RGB888); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLubyte *dst = ((GLubyte *) rb->Data) + - 3 * (y[i] * rb->RowStride + x[i]); - dst[0] = val0; - dst[1] = val1; - dst[2] = val2; - } - } -} - - -/********************************************************************** - * Functions for buffers of 4 X GLubyte (or GLbyte) values. - * Typically color buffers. - */ - -static void -get_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - /* treat 4*GLubyte as 1*GLuint */ - GLuint *dst = (GLuint *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - ASSERT(rb->Format == MESA_FORMAT_RGBA8888); - for (i = 0; i < count; i++) { - const GLuint *src = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]); - dst[i] = *src; - } -} - - -static void -put_row_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - /* treat 4*GLubyte as 1*GLuint */ - const GLuint *src = (const GLuint *) values; - GLuint *dst = (GLuint *) rb->Data + (y * rb->RowStride + x); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - ASSERT(rb->Format == MESA_FORMAT_RGBA8888); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = src[i]; - } - } - } - else { - memcpy(dst, src, 4 * count * sizeof(GLubyte)); - } -} - - -static void -put_row_rgb_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - /* Store RGB values in RGBA buffer */ - const GLubyte *src = (const GLubyte *) values; - GLubyte *dst = (GLubyte *) rb->Data + 4 * (y * rb->RowStride + x); - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - ASSERT(rb->Format == MESA_FORMAT_RGBA8888); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - dst[i * 4 + 0] = src[i * 3 + 0]; - dst[i * 4 + 1] = src[i * 3 + 1]; - dst[i * 4 + 2] = src[i * 3 + 2]; - dst[i * 4 + 3] = 0xff; - } - } -} - - -static void -put_mono_row_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *value, const GLubyte *mask) -{ - /* treat 4*GLubyte as 1*GLuint */ - const GLuint val = *((const GLuint *) value); - GLuint *dst = (GLuint *) rb->Data + (y * rb->RowStride + x); - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - ASSERT(rb->Format == MESA_FORMAT_RGBA8888); - if (!mask && val == 0) { - /* common case */ - memset(dst, 0, count * 4 * sizeof(GLubyte)); - } - else { - /* general case */ - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = val; - } - } - } - else { - GLuint i; - for (i = 0; i < count; i++) { - dst[i] = val; - } - } - } -} - - -static void -put_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], const void *values, - const GLubyte *mask) -{ - /* treat 4*GLubyte as 1*GLuint */ - const GLuint *src = (const GLuint *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - ASSERT(rb->Format == MESA_FORMAT_RGBA8888); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]); - *dst = src[i]; - } - } -} - - -static void -put_mono_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - /* treat 4*GLubyte as 1*GLuint */ - const GLuint val = *((const GLuint *) value); - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_BYTE); - ASSERT(rb->Format == MESA_FORMAT_RGBA8888); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]); - *dst = val; - } - } -} - - -/********************************************************************** - * Functions for buffers of 4 X GLushort (or GLshort) values. - * Typically accum buffer. - */ - -static void -get_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLushort *dst = (GLushort *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); - for (i = 0; i < count; i++) { - const GLushort *src - = (GLushort *) rb->Data + 4 * (y[i] * rb->RowStride + x[i]); - dst[i] = *src; - } -} - - -static void -put_row_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - const GLushort *src = (const GLushort *) values; - GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x); - ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i * 4 + 0] = src[i * 4 + 0]; - dst[i * 4 + 1] = src[i * 4 + 1]; - dst[i * 4 + 2] = src[i * 4 + 2]; - dst[i * 4 + 3] = src[i * 4 + 3]; - } - } - } - else { - memcpy(dst, src, 4 * count * sizeof(GLushort)); - } -} - - -static void -put_row_rgb_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - /* Put RGB values in RGBA buffer */ - const GLushort *src = (const GLushort *) values; - GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x); - ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i * 4 + 0] = src[i * 3 + 0]; - dst[i * 4 + 1] = src[i * 3 + 1]; - dst[i * 4 + 2] = src[i * 3 + 2]; - dst[i * 4 + 3] = 0xffff; - } - } - } - else { - memcpy(dst, src, 4 * count * sizeof(GLushort)); - } -} - - -static void -put_mono_row_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, const void *value, const GLubyte *mask) -{ - const GLushort val0 = ((const GLushort *) value)[0]; - const GLushort val1 = ((const GLushort *) value)[1]; - const GLushort val2 = ((const GLushort *) value)[2]; - const GLushort val3 = ((const GLushort *) value)[3]; - GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x); - ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); - if (!mask && val0 == 0 && val1 == 0 && val2 == 0 && val3 == 0) { - /* common case for clearing accum buffer */ - memset(dst, 0, count * 4 * sizeof(GLushort)); - } - else { - GLuint i; - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - dst[i * 4 + 0] = val0; - dst[i * 4 + 1] = val1; - dst[i * 4 + 2] = val2; - dst[i * 4 + 3] = val3; - } - } - } -} - - -static void -put_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], const void *values, - const GLubyte *mask) -{ - const GLushort *src = (const GLushort *) values; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLushort *dst = - ((GLushort *) rb->Data) + 4 * (y[i] * rb->RowStride + x[i]); - dst[0] = src[i * 4 + 0]; - dst[1] = src[i * 4 + 1]; - dst[2] = src[i * 4 + 2]; - dst[3] = src[i * 4 + 3]; - } - } -} - - -static void -put_mono_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - const GLushort val0 = ((const GLushort *) value)[0]; - const GLushort val1 = ((const GLushort *) value)[1]; - const GLushort val2 = ((const GLushort *) value)[2]; - const GLushort val3 = ((const GLushort *) value)[3]; - GLuint i; - ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLushort *dst = ((GLushort *) rb->Data) + - 4 * (y[i] * rb->RowStride + x[i]); - dst[0] = val0; - dst[1] = val1; - dst[2] = val2; - dst[3] = val3; - } - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_R8. - */ -static void -get_row_r8(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, void *values) -{ - const GLubyte *src = rb->GetPointer(ctx, rb, x, y); - GLuint *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i] = 0xff000000 | src[i]; - } -} - -static void -get_values_r8(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLuint *dst = (GLuint *) values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLubyte *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i] = 0xff000000 | *src; - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_RG88. - */ -static void -get_row_rg88(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, void *values) -{ - const GLushort *src = rb->GetPointer(ctx, rb, x, y); - GLuint *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i] = 0xff000000 | src[i]; - } -} - -static void -get_values_rg88(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], void *values) -{ - GLuint *dst = (GLuint *) values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLshort *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i] = 0xff000000 | *src; - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_R16. - */ -static void -get_row_r16(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, void *values) -{ - const GLushort *src = rb->GetPointer(ctx, rb, x, y); - GLushort *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i * 4 + RCOMP] = src[i]; - dst[i * 4 + GCOMP] = 0; - dst[i * 4 + BCOMP] = 0; - dst[i * 4 + ACOMP] = 0xffff; - } -} - -static void -get_values_r16(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLushort *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLushort *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i * 4 + RCOMP] = *src; - dst[i * 4 + GCOMP] = 0; - dst[i * 4 + BCOMP] = 0; - dst[i * 4 + ACOMP] = 0xffff; - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_RG1616. - */ -static void -get_row_rg1616(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, - GLint x, GLint y, void *values) -{ - const GLushort *src = rb->GetPointer(ctx, rb, x, y); - GLushort *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i * 4 + RCOMP] = src[i * 2]; - dst[i * 4 + GCOMP] = src[i * 2 + 1]; - dst[i * 4 + BCOMP] = 0; - dst[i * 4 + ACOMP] = 0xffff; - } -} - -static void -get_values_rg1616(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], void *values) -{ - GLushort *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLshort *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i * 4 + RCOMP] = src[0]; - dst[i * 4 + GCOMP] = src[1]; - dst[i * 4 + BCOMP] = 0; - dst[i * 4 + ACOMP] = 0xffff; - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_INTENSITY_FLOAT32. - */ -static void -get_row_i_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, void *values) -{ - const GLfloat *src = rb->GetPointer(ctx, rb, x, y); - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i * 4 + RCOMP] = - dst[i * 4 + GCOMP] = - dst[i * 4 + BCOMP] = - dst[i * 4 + ACOMP] = src[i]; - } -} - -static void -get_values_i_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values) -{ - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i * 4 + RCOMP] = - dst[i * 4 + GCOMP] = - dst[i * 4 + BCOMP] = - dst[i * 4 + ACOMP] = src[0]; - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_LUMINANCE_FLOAT32. - */ -static void -get_row_l_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, void *values) -{ - const GLfloat *src = rb->GetPointer(ctx, rb, x, y); - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i * 4 + RCOMP] = - dst[i * 4 + GCOMP] = - dst[i * 4 + BCOMP] = src[i]; - dst[i * 4 + ACOMP] = 1.0; - } -} - -static void -get_values_l_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values) -{ - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i * 4 + RCOMP] = - dst[i * 4 + GCOMP] = - dst[i * 4 + BCOMP] = src[0]; - dst[i * 4 + ACOMP] = 1.0; - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_ALPHA_FLOAT32. - */ -static void -get_row_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, void *values) -{ - const GLfloat *src = rb->GetPointer(ctx, rb, x, y); - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i * 4 + RCOMP] = 0.0; - dst[i * 4 + GCOMP] = 0.0; - dst[i * 4 + BCOMP] = 0.0; - dst[i * 4 + ACOMP] = src[i]; - } -} - -static void -get_values_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values) -{ - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i * 4 + RCOMP] = 0.0; - dst[i * 4 + GCOMP] = 0.0; - dst[i * 4 + BCOMP] = 0.0; - dst[i * 4 + ACOMP] = src[0]; - } -} - -static void -put_row_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const void *values, const GLubyte *mask) -{ - float *dst = rb->GetPointer(ctx, rb, x, y); - const float *src = values; - unsigned int i; - - if (mask) { - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = src[i * 4 + ACOMP]; - } - } - } - else { - for (i = 0; i < count; i++) { - dst[i] = src[i * 4 + ACOMP]; - } - } -} - -static void -put_mono_row_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const void *value, const GLubyte *mask) -{ - float *dst = rb->GetPointer(ctx, rb, x, y); - const float *src = value; - unsigned int i; - - if (mask) { - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = src[ACOMP]; - } - } - } - else { - for (i = 0; i < count; i++) { - dst[i] = src[ACOMP]; - } - } -} - -static void -put_values_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *values, const GLubyte *mask) -{ - const float *src = values; - unsigned int i; - - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - float *dst = rb->GetPointer(ctx, rb, x[i], y[i]); - - *dst = src[i * 4 + ACOMP]; - } - } -} - -static void -put_mono_values_a_float32(struct gl_context *ctx, - struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - const float *src = value; - unsigned int i; - - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - float *dst = rb->GetPointer(ctx, rb, x[i], y[i]); - *dst = src[ACOMP]; - } - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_R_FLOAT32. - */ -static void -get_row_r_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, void *values) -{ - const GLfloat *src = rb->GetPointer(ctx, rb, x, y); - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i * 4 + RCOMP] = src[i]; - dst[i * 4 + GCOMP] = 0.0; - dst[i * 4 + BCOMP] = 0.0; - dst[i * 4 + ACOMP] = 1.0; - } -} - -static void -get_values_r_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values) -{ - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i * 4 + RCOMP] = src[0]; - dst[i * 4 + GCOMP] = 0.0; - dst[i * 4 + BCOMP] = 0.0; - dst[i * 4 + ACOMP] = 1.0; - } -} - -/********************************************************************** - * Functions for MESA_FORMAT_RG_FLOAT32. - */ -static void -get_row_rg_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, void *values) -{ - const GLfloat *src = rb->GetPointer(ctx, rb, x, y); - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - dst[i * 4 + RCOMP] = src[i * 2 + 0]; - dst[i * 4 + GCOMP] = src[i * 2 + 1]; - dst[i * 4 + BCOMP] = 0.0; - dst[i * 4 + ACOMP] = 1.0; - } -} - -static void -get_values_rg_float32(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values) -{ - GLfloat *dst = values; - GLuint i; - - for (i = 0; i < count; i++) { - const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]); - dst[i * 4 + RCOMP] = src[0]; - dst[i * 4 + GCOMP] = src[1]; - dst[i * 4 + BCOMP] = 0.0; - dst[i * 4 + ACOMP] = 1.0; - } -} - -/** - * This is the default software fallback for gl_renderbuffer's span - * access functions. - * - * The assumptions are that rb->Data will be a pointer to (0,0), that pixels - * are packed in the type of rb->Format, and that subsequent rows appear - * rb->RowStride pixels later. - */ -void -_mesa_set_renderbuffer_accessors(struct gl_renderbuffer *rb) -{ - rb->GetPointer = get_pointer_generic; - rb->GetRow = get_row_generic; - - switch (rb->Format) { - case MESA_FORMAT_RGB888: - rb->DataType = GL_UNSIGNED_BYTE; - rb->GetPointer = get_pointer_ubyte3; - rb->GetRow = get_row_ubyte3; - rb->GetValues = get_values_ubyte3; - rb->PutRow = put_row_ubyte3; - rb->PutRowRGB = put_row_rgb_ubyte3; - rb->PutMonoRow = put_mono_row_ubyte3; - rb->PutValues = put_values_ubyte3; - rb->PutMonoValues = put_mono_values_ubyte3; - break; - - case MESA_FORMAT_RGBA8888: - rb->DataType = GL_UNSIGNED_BYTE; - rb->GetValues = get_values_ubyte4; - rb->PutRow = put_row_ubyte4; - rb->PutRowRGB = put_row_rgb_ubyte4; - rb->PutMonoRow = put_mono_row_ubyte4; - rb->PutValues = put_values_ubyte4; - rb->PutMonoValues = put_mono_values_ubyte4; - break; - - case MESA_FORMAT_R8: - rb->DataType = GL_UNSIGNED_BYTE; - rb->GetValues = get_values_r8; - rb->GetRow = get_row_r8; - rb->PutRow = put_row_generic; - rb->PutRowRGB = put_row_generic; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_RG88: - rb->DataType = GL_UNSIGNED_BYTE; - rb->GetValues = get_values_rg88; - rb->GetRow = get_row_rg88; - rb->PutRow = put_row_generic; - rb->PutRowRGB = put_row_generic; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_R16: - rb->DataType = GL_UNSIGNED_SHORT; - rb->GetValues = get_values_r16; - rb->GetRow = get_row_r16; - rb->PutRow = put_row_generic; - rb->PutRowRGB = put_row_generic; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_RG1616: - rb->DataType = GL_UNSIGNED_SHORT; - rb->GetValues = get_values_rg1616; - rb->GetRow = get_row_rg1616; - rb->PutRow = put_row_generic; - rb->PutRowRGB = put_row_generic; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_SIGNED_RGBA_16: - rb->DataType = GL_SHORT; - rb->GetValues = get_values_ushort4; - rb->PutRow = put_row_ushort4; - rb->PutRowRGB = put_row_rgb_ushort4; - rb->PutMonoRow = put_mono_row_ushort4; - rb->PutValues = put_values_ushort4; - rb->PutMonoValues = put_mono_values_ushort4; - break; - -#if 0 - case MESA_FORMAT_A8: - rb->DataType = GL_UNSIGNED_BYTE; - rb->GetValues = get_values_alpha8; - rb->PutRow = put_row_alpha8; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_alpha8; - rb->PutValues = put_values_alpha8; - rb->PutMonoValues = put_mono_values_alpha8; - break; -#endif - - case MESA_FORMAT_S8: - rb->DataType = GL_UNSIGNED_BYTE; - rb->GetValues = get_values_ubyte; - rb->PutRow = put_row_ubyte; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_ubyte; - rb->PutValues = put_values_ubyte; - rb->PutMonoValues = put_mono_values_ubyte; - break; - - case MESA_FORMAT_Z16: - rb->DataType = GL_UNSIGNED_SHORT; - rb->GetValues = get_values_ushort; - rb->PutRow = put_row_ushort; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_ushort; - rb->PutValues = put_values_ushort; - rb->PutMonoValues = put_mono_values_ushort; - break; - - case MESA_FORMAT_Z32: - case MESA_FORMAT_X8_Z24: - case MESA_FORMAT_Z24_X8: - rb->DataType = GL_UNSIGNED_INT; - rb->GetValues = get_values_uint; - rb->PutRow = put_row_uint; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_uint; - rb->PutValues = put_values_uint; - rb->PutMonoValues = put_mono_values_uint; - break; - - case MESA_FORMAT_Z24_S8: - case MESA_FORMAT_S8_Z24: - rb->DataType = GL_UNSIGNED_INT_24_8_EXT; - rb->GetValues = get_values_uint; - rb->PutRow = put_row_uint; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_uint; - rb->PutValues = put_values_uint; - rb->PutMonoValues = put_mono_values_uint; - break; - - case MESA_FORMAT_RGBA_FLOAT32: - rb->GetRow = get_row_generic; - rb->GetValues = get_values_generic; - rb->PutRow = put_row_generic; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_INTENSITY_FLOAT32: - rb->GetRow = get_row_i_float32; - rb->GetValues = get_values_i_float32; - rb->PutRow = put_row_generic; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_LUMINANCE_FLOAT32: - rb->GetRow = get_row_l_float32; - rb->GetValues = get_values_l_float32; - rb->PutRow = put_row_generic; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_ALPHA_FLOAT32: - rb->GetRow = get_row_a_float32; - rb->GetValues = get_values_a_float32; - rb->PutRow = put_row_a_float32; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_a_float32; - rb->PutValues = put_values_a_float32; - rb->PutMonoValues = put_mono_values_a_float32; - break; - - case MESA_FORMAT_RG_FLOAT32: - rb->GetRow = get_row_rg_float32; - rb->GetValues = get_values_rg_float32; - rb->PutRow = put_row_generic; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - case MESA_FORMAT_R_FLOAT32: - rb->GetRow = get_row_r_float32; - rb->GetValues = get_values_r_float32; - rb->PutRow = put_row_generic; - rb->PutRowRGB = NULL; - rb->PutMonoRow = put_mono_row_generic; - rb->PutValues = put_values_generic; - rb->PutMonoValues = put_mono_values_generic; - break; - - default: - break; - } -} - -/** - * This is a software fallback for the gl_renderbuffer->AllocStorage - * function. - * Device drivers will typically override this function for the buffers - * which it manages (typically color buffers, Z and stencil). - * Other buffers (like software accumulation and aux buffers) which the driver - * doesn't manage can be handled with this function. - * - * This one multi-purpose function can allocate stencil, depth, accum, color - * or color-index buffers! - * - * This function also plugs in the appropriate GetPointer, Get/PutRow and - * Get/PutValues functions. - */ -GLboolean -_mesa_soft_renderbuffer_storage(struct gl_context *ctx, struct gl_renderbuffer *rb, - GLenum internalFormat, - GLuint width, GLuint height) -{ - switch (internalFormat) { - case GL_RGB: - case GL_R3_G3_B2: - case GL_RGB4: - case GL_RGB5: - case GL_RGB8: - case GL_RGB10: - case GL_RGB12: - case GL_RGB16: - rb->Format = MESA_FORMAT_RGB888; - break; - case GL_RGBA: - case GL_RGBA2: - case GL_RGBA4: - case GL_RGB5_A1: - case GL_RGBA8: -#if 1 - case GL_RGB10_A2: - case GL_RGBA12: -#endif - rb->Format = MESA_FORMAT_RGBA8888; - break; - case GL_RGBA16: - case GL_RGBA16_SNORM: - /* for accum buffer */ - rb->Format = MESA_FORMAT_SIGNED_RGBA_16; - break; -#if 0 - case GL_ALPHA8: - rb->Format = MESA_FORMAT_A8; - break; -#endif - case GL_STENCIL_INDEX: - case GL_STENCIL_INDEX1_EXT: - case GL_STENCIL_INDEX4_EXT: - case GL_STENCIL_INDEX8_EXT: - case GL_STENCIL_INDEX16_EXT: - rb->Format = MESA_FORMAT_S8; - break; - case GL_DEPTH_COMPONENT: - case GL_DEPTH_COMPONENT16: - rb->Format = MESA_FORMAT_Z16; - break; - case GL_DEPTH_COMPONENT24: - rb->Format = MESA_FORMAT_X8_Z24; - break; - case GL_DEPTH_COMPONENT32: - rb->Format = MESA_FORMAT_Z32; - break; - case GL_DEPTH_STENCIL_EXT: - case GL_DEPTH24_STENCIL8_EXT: - rb->Format = MESA_FORMAT_Z24_S8; - break; - default: - /* unsupported format */ - return GL_FALSE; - } - - _mesa_set_renderbuffer_accessors(rb); - - ASSERT(rb->DataType); - ASSERT(rb->GetPointer); - ASSERT(rb->GetRow); - ASSERT(rb->GetValues); - ASSERT(rb->PutRow); - ASSERT(rb->PutMonoRow); - ASSERT(rb->PutValues); - ASSERT(rb->PutMonoValues); - - /* free old buffer storage */ - if (rb->Data) { - free(rb->Data); - rb->Data = NULL; - } - - rb->RowStride = width; - - if (width > 0 && height > 0) { - /* allocate new buffer storage */ - rb->Data = malloc(width * height * _mesa_get_format_bytes(rb->Format)); - - if (rb->Data == NULL) { - rb->Width = 0; - rb->Height = 0; - rb->RowStride = 0; - _mesa_error(ctx, GL_OUT_OF_MEMORY, - "software renderbuffer allocation (%d x %d x %d)", - width, height, _mesa_get_format_bytes(rb->Format)); - return GL_FALSE; - } - } - - rb->Width = width; - rb->Height = height; - rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat); - - if (rb->Name == 0 && - internalFormat == GL_RGBA16_SNORM && - rb->_BaseFormat == 0) { - /* NOTE: This is a special case just for accumulation buffers. - * This is a very limited use case- there's no snorm texturing or - * rendering going on. - */ - rb->_BaseFormat = GL_RGBA; - } - else { - /* the internalFormat should have been error checked long ago */ - ASSERT(rb->_BaseFormat); - } - - return GL_TRUE; -} - - - -/**********************************************************************/ -/**********************************************************************/ -/**********************************************************************/ - - -/** - * Here we utilize the gl_renderbuffer->Wrapper field to put an alpha - * buffer wrapper around an existing RGB renderbuffer (hw or sw). - * - * When PutRow is called (for example), we store the alpha values in - * this buffer, then pass on the PutRow call to the wrapped RGB - * buffer. - */ - - -static GLboolean -alloc_storage_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, - GLenum internalFormat, GLuint width, GLuint height) -{ - ASSERT(arb != arb->Wrapped); - ASSERT(arb->Format == MESA_FORMAT_A8); - - /* first, pass the call to the wrapped RGB buffer */ - if (!arb->Wrapped->AllocStorage(ctx, arb->Wrapped, internalFormat, - width, height)) { - return GL_FALSE; - } - - /* next, resize my alpha buffer */ - if (arb->Data) { - free(arb->Data); - } - - arb->Data = malloc(width * height * sizeof(GLubyte)); - if (arb->Data == NULL) { - arb->Width = 0; - arb->Height = 0; - _mesa_error(ctx, GL_OUT_OF_MEMORY, "software alpha buffer allocation"); - return GL_FALSE; - } - - arb->Width = width; - arb->Height = height; - arb->RowStride = width; - - return GL_TRUE; -} - - -/** - * Delete an alpha_renderbuffer object, as well as the wrapped RGB buffer. - */ -static void -delete_renderbuffer_alpha8(struct gl_renderbuffer *arb) -{ - if (arb->Data) { - free(arb->Data); - } - ASSERT(arb->Wrapped); - ASSERT(arb != arb->Wrapped); - arb->Wrapped->Delete(arb->Wrapped); - arb->Wrapped = NULL; - free(arb); -} - - -static void * -get_pointer_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, - GLint x, GLint y) -{ - return NULL; /* don't allow direct access! */ -} - - -static void -get_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, - GLint x, GLint y, void *values) -{ - /* NOTE: 'values' is RGBA format! */ - const GLubyte *src = (const GLubyte *) arb->Data + y * arb->RowStride + x; - GLubyte *dst = (GLubyte *) values; - GLuint i; - ASSERT(arb != arb->Wrapped); - ASSERT(arb->DataType == GL_UNSIGNED_BYTE); - /* first, pass the call to the wrapped RGB buffer */ - arb->Wrapped->GetRow(ctx, arb->Wrapped, count, x, y, values); - /* second, fill in alpha values from this buffer! */ - for (i = 0; i < count; i++) { - dst[i * 4 + 3] = src[i]; - } -} - - -static void -get_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, - const GLint x[], const GLint y[], void *values) -{ - GLubyte *dst = (GLubyte *) values; - GLuint i; - ASSERT(arb != arb->Wrapped); - ASSERT(arb->DataType == GL_UNSIGNED_BYTE); - /* first, pass the call to the wrapped RGB buffer */ - arb->Wrapped->GetValues(ctx, arb->Wrapped, count, x, y, values); - /* second, fill in alpha values from this buffer! */ - for (i = 0; i < count; i++) { - const GLubyte *src = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i]; - dst[i * 4 + 3] = *src; - } -} - - -static void -put_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - const GLubyte *src = (const GLubyte *) values; - GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x; - GLuint i; - ASSERT(arb != arb->Wrapped); - ASSERT(arb->DataType == GL_UNSIGNED_BYTE); - /* first, pass the call to the wrapped RGB buffer */ - arb->Wrapped->PutRow(ctx, arb->Wrapped, count, x, y, values, mask); - /* second, store alpha in our buffer */ - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - dst[i] = src[i * 4 + 3]; - } - } -} - - -static void -put_row_rgb_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, - GLint x, GLint y, const void *values, const GLubyte *mask) -{ - const GLubyte *src = (const GLubyte *) values; - GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x; - GLuint i; - ASSERT(arb != arb->Wrapped); - ASSERT(arb->DataType == GL_UNSIGNED_BYTE); - /* first, pass the call to the wrapped RGB buffer */ - arb->Wrapped->PutRowRGB(ctx, arb->Wrapped, count, x, y, values, mask); - /* second, store alpha in our buffer */ - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - dst[i] = src[i * 4 + 3]; - } - } -} - - -static void -put_mono_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, - GLint x, GLint y, const void *value, const GLubyte *mask) -{ - const GLubyte val = ((const GLubyte *) value)[3]; - GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x; - ASSERT(arb != arb->Wrapped); - ASSERT(arb->DataType == GL_UNSIGNED_BYTE); - /* first, pass the call to the wrapped RGB buffer */ - arb->Wrapped->PutMonoRow(ctx, arb->Wrapped, count, x, y, value, mask); - /* second, store alpha in our buffer */ - if (mask) { - GLuint i; - for (i = 0; i < count; i++) { - if (mask[i]) { - dst[i] = val; - } - } - } - else { - memset(dst, val, count); - } -} - - -static void -put_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, - const GLint x[], const GLint y[], - const void *values, const GLubyte *mask) -{ - const GLubyte *src = (const GLubyte *) values; - GLuint i; - ASSERT(arb != arb->Wrapped); - ASSERT(arb->DataType == GL_UNSIGNED_BYTE); - /* first, pass the call to the wrapped RGB buffer */ - arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, values, mask); - /* second, store alpha in our buffer */ - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i]; - *dst = src[i * 4 + 3]; - } - } -} - - -static void -put_mono_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, - GLuint count, const GLint x[], const GLint y[], - const void *value, const GLubyte *mask) -{ - const GLubyte val = ((const GLubyte *) value)[3]; - GLuint i; - ASSERT(arb != arb->Wrapped); - ASSERT(arb->DataType == GL_UNSIGNED_BYTE); - /* first, pass the call to the wrapped RGB buffer */ - arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, value, mask); - /* second, store alpha in our buffer */ - for (i = 0; i < count; i++) { - if (!mask || mask[i]) { - GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i]; - *dst = val; - } - } -} - - -static void -copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src) -{ - ASSERT(dst->Format == MESA_FORMAT_A8); - ASSERT(src->Format == MESA_FORMAT_A8); - ASSERT(dst->Width == src->Width); - ASSERT(dst->Height == src->Height); - ASSERT(dst->RowStride == src->RowStride); - - memcpy(dst->Data, src->Data, dst->RowStride * dst->Height * sizeof(GLubyte)); -} - - -/**********************************************************************/ -/**********************************************************************/ -/**********************************************************************/ - - -/** - * Default GetPointer routine. Always return NULL to indicate that - * direct buffer access is not supported. - */ -static void * -nop_get_pointer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLint x, GLint y) -{ - return NULL; -} - - -/** - * Initialize the fields of a gl_renderbuffer to default values. - */ -void -_mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) -{ - _glthread_INIT_MUTEX(rb->Mutex); - - rb->ClassID = 0; - rb->Name = name; - rb->RefCount = 0; - rb->Delete = _mesa_delete_renderbuffer; - - /* The rest of these should be set later by the caller of this function or - * the AllocStorage method: - */ - rb->AllocStorage = NULL; - - rb->Width = 0; - rb->Height = 0; - rb->InternalFormat = GL_NONE; - rb->Format = MESA_FORMAT_NONE; - - rb->DataType = GL_NONE; - rb->Data = NULL; - - /* Point back to ourself so that we don't have to check for Wrapped==NULL - * all over the drivers. - */ - rb->Wrapped = rb; - - rb->GetPointer = nop_get_pointer; - rb->GetRow = NULL; - rb->GetValues = NULL; - rb->PutRow = NULL; - rb->PutRowRGB = NULL; - rb->PutMonoRow = NULL; - rb->PutValues = NULL; - rb->PutMonoValues = NULL; -} - - -/** - * Allocate a new gl_renderbuffer object. This can be used for user-created - * renderbuffers or window-system renderbuffers. - */ -struct gl_renderbuffer * -_mesa_new_renderbuffer(struct gl_context *ctx, GLuint name) -{ - struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer); - if (rb) { - _mesa_init_renderbuffer(rb, name); - } - return rb; -} - - -/** - * Delete a gl_framebuffer. - * This is the default function for renderbuffer->Delete(). - */ -void -_mesa_delete_renderbuffer(struct gl_renderbuffer *rb) -{ - if (rb->Data) { - free(rb->Data); - } - free(rb); -} - - -/** - * Allocate a software-based renderbuffer. This is called via the - * ctx->Driver.NewRenderbuffer() function when the user creates a new - * renderbuffer. - * This would not be used for hardware-based renderbuffers. - */ -struct gl_renderbuffer * -_mesa_new_soft_renderbuffer(struct gl_context *ctx, GLuint name) -{ - struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name); - if (rb) { - rb->AllocStorage = _mesa_soft_renderbuffer_storage; - /* Normally, one would setup the PutRow, GetRow, etc functions here. - * But we're doing that in the _mesa_soft_renderbuffer_storage() function - * instead. - */ - } - return rb; -} - - -/** - * Add software-based color renderbuffers to the given framebuffer. - * This is a helper routine for device drivers when creating a - * window system framebuffer (not a user-created render/framebuffer). - * Once this function is called, you can basically forget about this - * renderbuffer; core Mesa will handle all the buffer management and - * rendering! - */ -GLboolean -_mesa_add_color_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb, - GLuint rgbBits, GLuint alphaBits, - GLboolean frontLeft, GLboolean backLeft, - GLboolean frontRight, GLboolean backRight) -{ - gl_buffer_index b; - - if (rgbBits > 16 || alphaBits > 16) { - _mesa_problem(ctx, - "Unsupported bit depth in _mesa_add_color_renderbuffers"); - return GL_FALSE; - } - - assert(MAX_COLOR_ATTACHMENTS >= 4); - - for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { - struct gl_renderbuffer *rb; - - if (b == BUFFER_FRONT_LEFT && !frontLeft) - continue; - else if (b == BUFFER_BACK_LEFT && !backLeft) - continue; - else if (b == BUFFER_FRONT_RIGHT && !frontRight) - continue; - else if (b == BUFFER_BACK_RIGHT && !backRight) - continue; - - assert(fb->Attachment[b].Renderbuffer == NULL); - - rb = _mesa_new_renderbuffer(ctx, 0); - if (!rb) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer"); - return GL_FALSE; - } - - if (rgbBits <= 8) { - if (alphaBits) - rb->Format = MESA_FORMAT_RGBA8888; - else - rb->Format = MESA_FORMAT_RGB888; - } - else { - assert(rgbBits <= 16); - rb->Format = MESA_FORMAT_NONE; /*XXX RGBA16;*/ - } - rb->InternalFormat = GL_RGBA; - - rb->AllocStorage = _mesa_soft_renderbuffer_storage; - _mesa_add_renderbuffer(fb, b, rb); - } - - return GL_TRUE; -} - - -/** - * Add software-based alpha renderbuffers to the given framebuffer. - * This is a helper routine for device drivers when creating a - * window system framebuffer (not a user-created render/framebuffer). - * Once this function is called, you can basically forget about this - * renderbuffer; core Mesa will handle all the buffer management and - * rendering! - */ -GLboolean -_mesa_add_alpha_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb, - GLuint alphaBits, - GLboolean frontLeft, GLboolean backLeft, - GLboolean frontRight, GLboolean backRight) -{ - gl_buffer_index b; - - /* for window system framebuffers only! */ - assert(fb->Name == 0); - - if (alphaBits > 8) { - _mesa_problem(ctx, - "Unsupported bit depth in _mesa_add_alpha_renderbuffers"); - return GL_FALSE; - } - - assert(MAX_COLOR_ATTACHMENTS >= 4); - - /* Wrap each of the RGB color buffers with an alpha renderbuffer. - */ - for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { - struct gl_renderbuffer *arb; - - if (b == BUFFER_FRONT_LEFT && !frontLeft) - continue; - else if (b == BUFFER_BACK_LEFT && !backLeft) - continue; - else if (b == BUFFER_FRONT_RIGHT && !frontRight) - continue; - else if (b == BUFFER_BACK_RIGHT && !backRight) - continue; - - /* the RGB buffer to wrap must already exist!! */ - assert(fb->Attachment[b].Renderbuffer); - - /* only GLubyte supported for now */ - assert(fb->Attachment[b].Renderbuffer->DataType == GL_UNSIGNED_BYTE); - - /* allocate alpha renderbuffer */ - arb = _mesa_new_renderbuffer(ctx, 0); - if (!arb) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating alpha buffer"); - return GL_FALSE; - } - - /* wrap the alpha renderbuffer around the RGB renderbuffer */ - arb->Wrapped = fb->Attachment[b].Renderbuffer; - - /* Set up my alphabuffer fields and plug in my functions. - * The functions will put/get the alpha values from/to RGBA arrays - * and then call the wrapped buffer's functions to handle the RGB - * values. - */ - arb->InternalFormat = arb->Wrapped->InternalFormat; - arb->Format = MESA_FORMAT_A8; - arb->DataType = arb->Wrapped->DataType; - arb->AllocStorage = alloc_storage_alpha8; - arb->Delete = delete_renderbuffer_alpha8; - arb->GetPointer = get_pointer_alpha8; - arb->GetRow = get_row_alpha8; - arb->GetValues = get_values_alpha8; - arb->PutRow = put_row_alpha8; - arb->PutRowRGB = put_row_rgb_alpha8; - arb->PutMonoRow = put_mono_row_alpha8; - arb->PutValues = put_values_alpha8; - arb->PutMonoValues = put_mono_values_alpha8; - - /* clear the pointer to avoid assertion/sanity check failure later */ - fb->Attachment[b].Renderbuffer = NULL; - - /* plug the alpha renderbuffer into the colorbuffer attachment */ - _mesa_add_renderbuffer(fb, b, arb); - } - - return GL_TRUE; -} - - -/** - * For framebuffers that use a software alpha channel wrapper - * created by _mesa_add_alpha_renderbuffer or _mesa_add_soft_renderbuffers, - * copy the back buffer alpha channel into the front buffer alpha channel. - */ -void -_mesa_copy_soft_alpha_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb) -{ - if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && - fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) - copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer, - fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); - - - if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && - fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) - copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer, - fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); -} - - -/** - * Add a software-based depth renderbuffer to the given framebuffer. - * This is a helper routine for device drivers when creating a - * window system framebuffer (not a user-created render/framebuffer). - * Once this function is called, you can basically forget about this - * renderbuffer; core Mesa will handle all the buffer management and - * rendering! - */ -GLboolean -_mesa_add_depth_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb, - GLuint depthBits) -{ - struct gl_renderbuffer *rb; - - if (depthBits > 32) { - _mesa_problem(ctx, - "Unsupported depthBits in _mesa_add_depth_renderbuffer"); - return GL_FALSE; - } - - assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL); - - rb = _mesa_new_renderbuffer(ctx, 0); - if (!rb) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth buffer"); - return GL_FALSE; - } - - if (depthBits <= 16) { - rb->Format = MESA_FORMAT_Z16; - rb->InternalFormat = GL_DEPTH_COMPONENT16; - } - else if (depthBits <= 24) { - rb->Format = MESA_FORMAT_X8_Z24; - rb->InternalFormat = GL_DEPTH_COMPONENT24; - } - else { - rb->Format = MESA_FORMAT_Z32; - rb->InternalFormat = GL_DEPTH_COMPONENT32; - } - - rb->AllocStorage = _mesa_soft_renderbuffer_storage; - _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb); - - return GL_TRUE; -} - - -/** - * Add a software-based stencil renderbuffer to the given framebuffer. - * This is a helper routine for device drivers when creating a - * window system framebuffer (not a user-created render/framebuffer). - * Once this function is called, you can basically forget about this - * renderbuffer; core Mesa will handle all the buffer management and - * rendering! - */ -GLboolean -_mesa_add_stencil_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb, - GLuint stencilBits) -{ - struct gl_renderbuffer *rb; - - if (stencilBits > 16) { - _mesa_problem(ctx, - "Unsupported stencilBits in _mesa_add_stencil_renderbuffer"); - return GL_FALSE; - } - - assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL); - - rb = _mesa_new_renderbuffer(ctx, 0); - if (!rb) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating stencil buffer"); - return GL_FALSE; - } - - assert(stencilBits <= 8); - rb->Format = MESA_FORMAT_S8; - rb->InternalFormat = GL_STENCIL_INDEX8; - - rb->AllocStorage = _mesa_soft_renderbuffer_storage; - _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb); - - return GL_TRUE; -} - - -/** - * Add a software-based accumulation renderbuffer to the given framebuffer. - * This is a helper routine for device drivers when creating a - * window system framebuffer (not a user-created render/framebuffer). - * Once this function is called, you can basically forget about this - * renderbuffer; core Mesa will handle all the buffer management and - * rendering! - */ -GLboolean -_mesa_add_accum_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb, - GLuint redBits, GLuint greenBits, - GLuint blueBits, GLuint alphaBits) -{ - struct gl_renderbuffer *rb; - - if (redBits > 16 || greenBits > 16 || blueBits > 16 || alphaBits > 16) { - _mesa_problem(ctx, - "Unsupported accumBits in _mesa_add_accum_renderbuffer"); - return GL_FALSE; - } - - assert(fb->Attachment[BUFFER_ACCUM].Renderbuffer == NULL); - - rb = _mesa_new_renderbuffer(ctx, 0); - if (!rb) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); - return GL_FALSE; - } - - rb->Format = MESA_FORMAT_SIGNED_RGBA_16; - rb->InternalFormat = GL_RGBA16_SNORM; - rb->AllocStorage = _mesa_soft_renderbuffer_storage; - _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb); - - return GL_TRUE; -} - - - -/** - * Add a software-based aux renderbuffer to the given framebuffer. - * This is a helper routine for device drivers when creating a - * window system framebuffer (not a user-created render/framebuffer). - * Once this function is called, you can basically forget about this - * renderbuffer; core Mesa will handle all the buffer management and - * rendering! - * - * NOTE: color-index aux buffers not supported. - */ -GLboolean -_mesa_add_aux_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb, - GLuint colorBits, GLuint numBuffers) -{ - GLuint i; - - if (colorBits > 16) { - _mesa_problem(ctx, - "Unsupported accumBits in _mesa_add_aux_renderbuffers"); - return GL_FALSE; - } - - assert(numBuffers <= MAX_AUX_BUFFERS); - - for (i = 0; i < numBuffers; i++) { - struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, 0); - - assert(fb->Attachment[BUFFER_AUX0 + i].Renderbuffer == NULL); - - if (!rb) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating aux buffer"); - return GL_FALSE; - } - - assert (colorBits <= 8); - rb->Format = MESA_FORMAT_RGBA8888; - rb->InternalFormat = GL_RGBA; - - rb->AllocStorage = _mesa_soft_renderbuffer_storage; - _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb); - } - return GL_TRUE; -} - - -/** - * Create/attach software-based renderbuffers to the given framebuffer. - * This is a helper routine for device drivers. Drivers can just as well - * call the individual _mesa_add_*_renderbuffer() routines directly. - */ -void -_mesa_add_soft_renderbuffers(struct gl_framebuffer *fb, - GLboolean color, - GLboolean depth, - GLboolean stencil, - GLboolean accum, - GLboolean alpha, - GLboolean aux) -{ - GLboolean frontLeft = GL_TRUE; - GLboolean backLeft = fb->Visual.doubleBufferMode; - GLboolean frontRight = fb->Visual.stereoMode; - GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode; - - if (color) { - assert(fb->Visual.redBits == fb->Visual.greenBits); - assert(fb->Visual.redBits == fb->Visual.blueBits); - _mesa_add_color_renderbuffers(NULL, fb, - fb->Visual.redBits, - fb->Visual.alphaBits, - frontLeft, backLeft, - frontRight, backRight); - } - - if (depth) { - assert(fb->Visual.depthBits > 0); - _mesa_add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits); - } - - if (stencil) { - assert(fb->Visual.stencilBits > 0); - _mesa_add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits); - } - - if (accum) { - assert(fb->Visual.accumRedBits > 0); - assert(fb->Visual.accumGreenBits > 0); - assert(fb->Visual.accumBlueBits > 0); - _mesa_add_accum_renderbuffer(NULL, fb, - fb->Visual.accumRedBits, - fb->Visual.accumGreenBits, - fb->Visual.accumBlueBits, - fb->Visual.accumAlphaBits); - } - - if (aux) { - assert(fb->Visual.numAuxBuffers > 0); - _mesa_add_aux_renderbuffers(NULL, fb, fb->Visual.redBits, - fb->Visual.numAuxBuffers); - } - - if (alpha) { - assert(fb->Visual.alphaBits > 0); - _mesa_add_alpha_renderbuffers(NULL, fb, fb->Visual.alphaBits, - frontLeft, backLeft, - frontRight, backRight); - } - -#if 0 - if (multisample) { - /* maybe someday */ - } -#endif -} - - -/** - * Attach a renderbuffer to a framebuffer. - * \param bufferName one of the BUFFER_x tokens - */ -void -_mesa_add_renderbuffer(struct gl_framebuffer *fb, - gl_buffer_index bufferName, struct gl_renderbuffer *rb) -{ - assert(fb); - assert(rb); - assert(bufferName < BUFFER_COUNT); - - /* There should be no previous renderbuffer on this attachment point, - * with the exception of depth/stencil since the same renderbuffer may - * be used for both. - */ - assert(bufferName == BUFFER_DEPTH || - bufferName == BUFFER_STENCIL || - fb->Attachment[bufferName].Renderbuffer == NULL); - - /* winsys vs. user-created buffer cross check */ - if (fb->Name) { - assert(rb->Name); - } - else { - assert(!rb->Name); - } - - fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; - fb->Attachment[bufferName].Complete = GL_TRUE; - _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb); -} - - -/** - * Remove the named renderbuffer from the given framebuffer. - * \param bufferName one of the BUFFER_x tokens - */ -void -_mesa_remove_renderbuffer(struct gl_framebuffer *fb, - gl_buffer_index bufferName) -{ - struct gl_renderbuffer *rb; - - assert(bufferName < BUFFER_COUNT); - - rb = fb->Attachment[bufferName].Renderbuffer; - if (!rb) - return; - - _mesa_reference_renderbuffer(&rb, NULL); - - fb->Attachment[bufferName].Renderbuffer = NULL; -} - - -/** - * Set *ptr to point to rb. If *ptr points to another renderbuffer, - * dereference that buffer first. The new renderbuffer's refcount will - * be incremented. The old renderbuffer's refcount will be decremented. - * This is normally only called from the _mesa_reference_renderbuffer() macro - * when there's a real pointer change. - */ -void -_mesa_reference_renderbuffer_(struct gl_renderbuffer **ptr, - struct gl_renderbuffer *rb) -{ - if (*ptr) { - /* Unreference the old renderbuffer */ - GLboolean deleteFlag = GL_FALSE; - struct gl_renderbuffer *oldRb = *ptr; - - _glthread_LOCK_MUTEX(oldRb->Mutex); - ASSERT(oldRb->RefCount > 0); - oldRb->RefCount--; - /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/ - deleteFlag = (oldRb->RefCount == 0); - _glthread_UNLOCK_MUTEX(oldRb->Mutex); - - if (deleteFlag) { - oldRb->Delete(oldRb); - } - - *ptr = NULL; - } - assert(!*ptr); - - if (rb) { - /* reference new renderbuffer */ - _glthread_LOCK_MUTEX(rb->Mutex); - rb->RefCount++; - /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/ - _glthread_UNLOCK_MUTEX(rb->Mutex); - *ptr = rb; - } -} +/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * Functions for allocating/managing renderbuffers.
+ * Also, routines for reading/writing software-based renderbuffer data as
+ * ubytes, ushorts, uints, etc.
+ *
+ * The 'alpha8' renderbuffer is interesting. It's used to add a software-based
+ * alpha channel to RGB renderbuffers. This is done by wrapping the RGB
+ * renderbuffer with the alpha renderbuffer. We can do this because of the
+ * OO-nature of renderbuffers.
+ *
+ * Down the road we'll use this for run-time support of 8, 16 and 32-bit
+ * color channels. For example, Mesa may use 32-bit/float color channels
+ * internally (swrast) and use wrapper renderbuffers to convert 32-bit
+ * values down to 16 or 8-bit values for whatever kind of framebuffer we have.
+ */
+
+
+#include "glheader.h"
+#include "imports.h"
+#include "context.h"
+#include "fbobject.h"
+#include "formats.h"
+#include "mtypes.h"
+#include "renderbuffer.h"
+
+
+/*
+ * Routines for get/put values in common buffer formats follow.
+ */
+
+/* Returns a bytes per pixel of the DataType in the get/put span
+ * functions for at least a subset of the available combinations a
+ * renderbuffer can have.
+ *
+ * It would be nice to see gl_renderbuffer start talking about a
+ * gl_format instead of a GLenum DataType.
+ */
+static int
+get_datatype_bytes(struct gl_renderbuffer *rb)
+{
+ int component_size;
+
+ switch (rb->DataType) {
+ case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
+ component_size = 8;
+ break;
+ case GL_FLOAT:
+ case GL_UNSIGNED_INT:
+ case GL_UNSIGNED_INT_24_8_EXT:
+ component_size = 4;
+ break;
+ case GL_UNSIGNED_SHORT:
+ component_size = 2;
+ break;
+ case GL_UNSIGNED_BYTE:
+ component_size = 1;
+ break;
+ default:
+ component_size = 1;
+ assert(0);
+ }
+
+ switch (rb->_BaseFormat) {
+ case GL_DEPTH_COMPONENT:
+ case GL_DEPTH_STENCIL:
+ return component_size;
+ default:
+ return 4 * component_size;
+ }
+}
+
+/* This is commonly used by most of the accessors. */
+static void *
+get_pointer_generic(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint x, GLint y)
+{
+ if (!rb->Data)
+ return NULL;
+
+ return ((char *) rb->Data +
+ (y * rb->RowStride + x) * _mesa_get_format_bytes(rb->Format));
+}
+
+/* GetRow() implementation for formats where DataType matches the rb->Format.
+ */
+static void
+get_row_generic(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y, void *values)
+{
+ void *src = rb->GetPointer(ctx, rb, x, y);
+ memcpy(values, src, count * _mesa_get_format_bytes(rb->Format));
+}
+
+/* Only used for float textures currently, but might also be used for
+ * RGBA8888, RGBA16, etc.
+ */
+static void
+get_values_generic(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[], void *values)
+{
+ int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat);
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const void *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ char *dst = (char *) values + i * format_bytes;
+ memcpy(dst, src, format_bytes);
+ }
+}
+
+/* For the GL_RED/GL_RG/GL_RGB format/DataType combinations (and
+ * GL_LUMINANCE/GL_INTENSITY?), the Put functions are a matter of
+ * storing those initial components of the value per pixel into the
+ * destination.
+ */
+static void
+put_row_generic(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const void *values, const GLubyte *mask)
+{
+ void *row = rb->GetPointer(ctx, rb, x, y);
+ int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat);
+ int datatype_bytes = get_datatype_bytes(rb);
+ unsigned int i;
+
+ if (mask) {
+ for (i = 0; i < count; i++) {
+ char *dst = (char *) row + i * format_bytes;
+ const char *src = (const char *) values + i * datatype_bytes;
+
+ if (mask[i]) {
+ memcpy(dst, src, format_bytes);
+ }
+ }
+ }
+ else {
+ for (i = 0; i < count; i++) {
+ char *dst = (char *) row + i * format_bytes;
+ const char *src = (const char *) values + i * datatype_bytes;
+ memcpy(dst, src, format_bytes);
+ }
+ }
+}
+
+static void
+put_mono_row_generic(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const void *value, const GLubyte *mask)
+{
+ void *row = rb->GetPointer(ctx, rb, x, y);
+ int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat);
+ unsigned int i;
+
+ if (mask) {
+ for (i = 0; i < count; i++) {
+ char *dst = (char *) row + i * format_bytes;
+ if (mask[i]) {
+ memcpy(dst, value, format_bytes);
+ }
+ }
+ }
+ else {
+ for (i = 0; i < count; i++) {
+ char *dst = (char *) row + i * format_bytes;
+ memcpy(dst, value, format_bytes);
+ }
+ }
+}
+
+
+static void
+put_values_generic(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *values, const GLubyte *mask)
+{
+ int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat);
+ int datatype_bytes = get_datatype_bytes(rb);
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ void *dst = rb->GetPointer(ctx, rb, x[i], y[i]);
+ const char *src = (const char *) values + i * datatype_bytes;
+ memcpy(dst, src, format_bytes);
+ }
+ }
+}
+
+
+static void
+put_mono_values_generic(struct gl_context *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ int format_bytes = _mesa_get_format_bytes(rb->Format) / sizeof(GLfloat);
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ void *dst = rb->GetPointer(ctx, rb, x[i], y[i]);
+ memcpy(dst, value, format_bytes);
+ }
+ }
+}
+
+/**********************************************************************
+ * Functions for buffers of 1 X GLubyte values.
+ * Typically stencil.
+ */
+
+static void
+get_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLubyte *dst = (GLubyte *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ const GLubyte *src = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i];
+ dst[i] = *src;
+ }
+}
+
+
+static void
+put_row_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const GLubyte *src = (const GLubyte *) values;
+ GLubyte *dst = (GLubyte *) rb->Data + y * rb->RowStride + x;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = src[i];
+ }
+ }
+ }
+ else {
+ memcpy(dst, values, count * sizeof(GLubyte));
+ }
+}
+
+
+static void
+put_mono_row_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ const GLubyte val = *((const GLubyte *) value);
+ GLubyte *dst = (GLubyte *) rb->Data + y * rb->RowStride + x;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = val;
+ }
+ }
+ }
+ else {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ dst[i] = val;
+ }
+ }
+}
+
+
+static void
+put_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[],
+ const void *values, const GLubyte *mask)
+{
+ const GLubyte *src = (const GLubyte *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i];
+ *dst = src[i];
+ }
+ }
+}
+
+
+static void
+put_mono_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ const GLubyte val = *((const GLubyte *) value);
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i];
+ *dst = val;
+ }
+ }
+}
+
+
+/**********************************************************************
+ * Functions for buffers of 1 X GLushort values.
+ * Typically depth/Z.
+ */
+
+static void
+get_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLushort *dst = (GLushort *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ for (i = 0; i < count; i++) {
+ const GLushort *src = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i];
+ dst[i] = *src;
+ }
+}
+
+
+static void
+put_row_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const GLushort *src = (const GLushort *) values;
+ GLushort *dst = (GLushort *) rb->Data + y * rb->RowStride + x;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = src[i];
+ }
+ }
+ }
+ else {
+ memcpy(dst, src, count * sizeof(GLushort));
+ }
+}
+
+
+static void
+put_mono_row_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ const GLushort val = *((const GLushort *) value);
+ GLushort *dst = (GLushort *) rb->Data + y * rb->RowStride + x;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = val;
+ }
+ }
+ }
+ else {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ dst[i] = val;
+ }
+ }
+}
+
+
+static void
+put_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], const void *values,
+ const GLubyte *mask)
+{
+ const GLushort *src = (const GLushort *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i];
+ *dst = src[i];
+ }
+ }
+}
+
+
+static void
+put_mono_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ const GLushort val = *((const GLushort *) value);
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i];
+ *dst = val;
+ }
+ }
+ }
+ else {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i];
+ *dst = val;
+ }
+ }
+}
+
+
+/**********************************************************************
+ * Functions for buffers of 1 X GLuint values.
+ * Typically depth/Z or color index.
+ */
+
+static void
+get_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLuint *dst = (GLuint *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT ||
+ rb->DataType == GL_UNSIGNED_INT_24_8_EXT);
+ for (i = 0; i < count; i++) {
+ const GLuint *src = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i];
+ dst[i] = *src;
+ }
+}
+
+
+static void
+put_row_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const GLuint *src = (const GLuint *) values;
+ GLuint *dst = (GLuint *) rb->Data + y * rb->RowStride + x;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT ||
+ rb->DataType == GL_UNSIGNED_INT_24_8_EXT);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = src[i];
+ }
+ }
+ }
+ else {
+ memcpy(dst, src, count * sizeof(GLuint));
+ }
+}
+
+
+static void
+put_mono_row_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ const GLuint val = *((const GLuint *) value);
+ GLuint *dst = (GLuint *) rb->Data + y * rb->RowStride + x;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT ||
+ rb->DataType == GL_UNSIGNED_INT_24_8_EXT);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = val;
+ }
+ }
+ }
+ else {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ dst[i] = val;
+ }
+ }
+}
+
+
+static void
+put_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], const void *values,
+ const GLubyte *mask)
+{
+ const GLuint *src = (const GLuint *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT ||
+ rb->DataType == GL_UNSIGNED_INT_24_8_EXT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLuint *dst = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i];
+ *dst = src[i];
+ }
+ }
+}
+
+
+static void
+put_mono_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], const void *value,
+ const GLubyte *mask)
+{
+ const GLuint val = *((const GLuint *) value);
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_INT ||
+ rb->DataType == GL_UNSIGNED_INT_24_8_EXT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLuint *dst = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i];
+ *dst = val;
+ }
+ }
+}
+
+
+/**********************************************************************
+ * Functions for buffers of 3 X GLubyte (or GLbyte) values.
+ * Typically color buffers.
+ * NOTE: the incoming and outgoing colors are RGBA! We ignore incoming
+ * alpha values and return 255 for outgoing alpha values.
+ */
+
+static void *
+get_pointer_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLint x, GLint y)
+{
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ /* No direct access since this buffer is RGB but caller will be
+ * treating it as if it were RGBA.
+ */
+ return NULL;
+}
+
+
+static void
+get_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, void *values)
+{
+ const GLubyte *src = ((const GLubyte *) rb->Data) +
+ 3 * (y * rb->RowStride + x);
+ GLubyte *dst = (GLubyte *) values;
+ GLuint i;
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + 0] = src[i * 3 + 0];
+ dst[i * 4 + 1] = src[i * 3 + 1];
+ dst[i * 4 + 2] = src[i * 3 + 2];
+ dst[i * 4 + 3] = 255;
+ }
+}
+
+
+static void
+get_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLubyte *dst = (GLubyte *) values;
+ GLuint i;
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ const GLubyte *src
+ = (GLubyte *) rb->Data + 3 * (y[i] * rb->RowStride + x[i]);
+ dst[i * 4 + 0] = src[0];
+ dst[i * 4 + 1] = src[1];
+ dst[i * 4 + 2] = src[2];
+ dst[i * 4 + 3] = 255;
+ }
+}
+
+
+static void
+put_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ /* note: incoming values are RGB+A! */
+ const GLubyte *src = (const GLubyte *) values;
+ GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x);
+ GLuint i;
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst[i * 3 + 0] = src[i * 4 + 0];
+ dst[i * 3 + 1] = src[i * 4 + 1];
+ dst[i * 3 + 2] = src[i * 4 + 2];
+ }
+ }
+}
+
+
+static void
+put_row_rgb_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ /* note: incoming values are RGB+A! */
+ const GLubyte *src = (const GLubyte *) values;
+ GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x);
+ GLuint i;
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst[i * 3 + 0] = src[i * 3 + 0];
+ dst[i * 3 + 1] = src[i * 3 + 1];
+ dst[i * 3 + 2] = src[i * 3 + 2];
+ }
+ }
+}
+
+
+static void
+put_mono_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ /* note: incoming value is RGB+A! */
+ const GLubyte val0 = ((const GLubyte *) value)[0];
+ const GLubyte val1 = ((const GLubyte *) value)[1];
+ const GLubyte val2 = ((const GLubyte *) value)[2];
+ GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x);
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ if (!mask && val0 == val1 && val1 == val2) {
+ /* optimized case */
+ memset(dst, val0, 3 * count);
+ }
+ else {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst[i * 3 + 0] = val0;
+ dst[i * 3 + 1] = val1;
+ dst[i * 3 + 2] = val2;
+ }
+ }
+ }
+}
+
+
+static void
+put_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], const void *values,
+ const GLubyte *mask)
+{
+ /* note: incoming values are RGB+A! */
+ const GLubyte *src = (const GLubyte *) values;
+ GLuint i;
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLubyte *dst = (GLubyte *) rb->Data + 3 * (y[i] * rb->RowStride + x[i]);
+ dst[0] = src[i * 4 + 0];
+ dst[1] = src[i * 4 + 1];
+ dst[2] = src[i * 4 + 2];
+ }
+ }
+}
+
+
+static void
+put_mono_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ /* note: incoming value is RGB+A! */
+ const GLubyte val0 = ((const GLubyte *) value)[0];
+ const GLubyte val1 = ((const GLubyte *) value)[1];
+ const GLubyte val2 = ((const GLubyte *) value)[2];
+ GLuint i;
+ ASSERT(rb->Format == MESA_FORMAT_RGB888);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLubyte *dst = ((GLubyte *) rb->Data) +
+ 3 * (y[i] * rb->RowStride + x[i]);
+ dst[0] = val0;
+ dst[1] = val1;
+ dst[2] = val2;
+ }
+ }
+}
+
+
+/**********************************************************************
+ * Functions for buffers of 4 X GLubyte (or GLbyte) values.
+ * Typically color buffers.
+ */
+
+static void
+get_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ /* treat 4*GLubyte as 1*GLuint */
+ GLuint *dst = (GLuint *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
+ for (i = 0; i < count; i++) {
+ const GLuint *src = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]);
+ dst[i] = *src;
+ }
+}
+
+
+static void
+put_row_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ /* treat 4*GLubyte as 1*GLuint */
+ const GLuint *src = (const GLuint *) values;
+ GLuint *dst = (GLuint *) rb->Data + (y * rb->RowStride + x);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = src[i];
+ }
+ }
+ }
+ else {
+ memcpy(dst, src, 4 * count * sizeof(GLubyte));
+ }
+}
+
+
+static void
+put_row_rgb_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ /* Store RGB values in RGBA buffer */
+ const GLubyte *src = (const GLubyte *) values;
+ GLubyte *dst = (GLubyte *) rb->Data + 4 * (y * rb->RowStride + x);
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst[i * 4 + 0] = src[i * 3 + 0];
+ dst[i * 4 + 1] = src[i * 3 + 1];
+ dst[i * 4 + 2] = src[i * 3 + 2];
+ dst[i * 4 + 3] = 0xff;
+ }
+ }
+}
+
+
+static void
+put_mono_row_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ /* treat 4*GLubyte as 1*GLuint */
+ const GLuint val = *((const GLuint *) value);
+ GLuint *dst = (GLuint *) rb->Data + (y * rb->RowStride + x);
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
+ if (!mask && val == 0) {
+ /* common case */
+ memset(dst, 0, count * 4 * sizeof(GLubyte));
+ }
+ else {
+ /* general case */
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = val;
+ }
+ }
+ }
+ else {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ dst[i] = val;
+ }
+ }
+ }
+}
+
+
+static void
+put_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], const void *values,
+ const GLubyte *mask)
+{
+ /* treat 4*GLubyte as 1*GLuint */
+ const GLuint *src = (const GLuint *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]);
+ *dst = src[i];
+ }
+ }
+}
+
+
+static void
+put_mono_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ /* treat 4*GLubyte as 1*GLuint */
+ const GLuint val = *((const GLuint *) value);
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_BYTE);
+ ASSERT(rb->Format == MESA_FORMAT_RGBA8888);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]);
+ *dst = val;
+ }
+ }
+}
+
+
+/**********************************************************************
+ * Functions for buffers of 4 X GLushort (or GLshort) values.
+ * Typically accum buffer.
+ */
+
+static void
+get_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLushort *dst = (GLushort *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT);
+ for (i = 0; i < count; i++) {
+ const GLushort *src
+ = (GLushort *) rb->Data + 4 * (y[i] * rb->RowStride + x[i]);
+ dst[i] = *src;
+ }
+}
+
+
+static void
+put_row_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const GLushort *src = (const GLushort *) values;
+ GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x);
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i * 4 + 0] = src[i * 4 + 0];
+ dst[i * 4 + 1] = src[i * 4 + 1];
+ dst[i * 4 + 2] = src[i * 4 + 2];
+ dst[i * 4 + 3] = src[i * 4 + 3];
+ }
+ }
+ }
+ else {
+ memcpy(dst, src, 4 * count * sizeof(GLushort));
+ }
+}
+
+
+static void
+put_row_rgb_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ /* Put RGB values in RGBA buffer */
+ const GLushort *src = (const GLushort *) values;
+ GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x);
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT);
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i * 4 + 0] = src[i * 3 + 0];
+ dst[i * 4 + 1] = src[i * 3 + 1];
+ dst[i * 4 + 2] = src[i * 3 + 2];
+ dst[i * 4 + 3] = 0xffff;
+ }
+ }
+ }
+ else {
+ memcpy(dst, src, 4 * count * sizeof(GLushort));
+ }
+}
+
+
+static void
+put_mono_row_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ const GLushort val0 = ((const GLushort *) value)[0];
+ const GLushort val1 = ((const GLushort *) value)[1];
+ const GLushort val2 = ((const GLushort *) value)[2];
+ const GLushort val3 = ((const GLushort *) value)[3];
+ GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x);
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT);
+ if (!mask && val0 == 0 && val1 == 0 && val2 == 0 && val3 == 0) {
+ /* common case for clearing accum buffer */
+ memset(dst, 0, count * 4 * sizeof(GLushort));
+ }
+ else {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst[i * 4 + 0] = val0;
+ dst[i * 4 + 1] = val1;
+ dst[i * 4 + 2] = val2;
+ dst[i * 4 + 3] = val3;
+ }
+ }
+ }
+}
+
+
+static void
+put_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], const void *values,
+ const GLubyte *mask)
+{
+ const GLushort *src = (const GLushort *) values;
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLushort *dst =
+ ((GLushort *) rb->Data) + 4 * (y[i] * rb->RowStride + x[i]);
+ dst[0] = src[i * 4 + 0];
+ dst[1] = src[i * 4 + 1];
+ dst[2] = src[i * 4 + 2];
+ dst[3] = src[i * 4 + 3];
+ }
+ }
+}
+
+
+static void
+put_mono_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ const GLushort val0 = ((const GLushort *) value)[0];
+ const GLushort val1 = ((const GLushort *) value)[1];
+ const GLushort val2 = ((const GLushort *) value)[2];
+ const GLushort val3 = ((const GLushort *) value)[3];
+ GLuint i;
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLushort *dst = ((GLushort *) rb->Data) +
+ 4 * (y[i] * rb->RowStride + x[i]);
+ dst[0] = val0;
+ dst[1] = val1;
+ dst[2] = val2;
+ dst[3] = val3;
+ }
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_R8.
+ */
+static void
+get_row_r8(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, void *values)
+{
+ const GLubyte *src = rb->GetPointer(ctx, rb, x, y);
+ GLuint *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i] = 0xff000000 | src[i];
+ }
+}
+
+static void
+get_values_r8(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLuint *dst = (GLuint *) values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLubyte *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i] = 0xff000000 | *src;
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_RG88.
+ */
+static void
+get_row_rg88(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, void *values)
+{
+ const GLushort *src = rb->GetPointer(ctx, rb, x, y);
+ GLuint *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i] = 0xff000000 | src[i];
+ }
+}
+
+static void
+get_values_rg88(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[], void *values)
+{
+ GLuint *dst = (GLuint *) values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLshort *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i] = 0xff000000 | *src;
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_R16.
+ */
+static void
+get_row_r16(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, void *values)
+{
+ const GLushort *src = rb->GetPointer(ctx, rb, x, y);
+ GLushort *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + RCOMP] = src[i];
+ dst[i * 4 + GCOMP] = 0;
+ dst[i * 4 + BCOMP] = 0;
+ dst[i * 4 + ACOMP] = 0xffff;
+ }
+}
+
+static void
+get_values_r16(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLushort *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLushort *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i * 4 + RCOMP] = *src;
+ dst[i * 4 + GCOMP] = 0;
+ dst[i * 4 + BCOMP] = 0;
+ dst[i * 4 + ACOMP] = 0xffff;
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_RG1616.
+ */
+static void
+get_row_rg1616(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, void *values)
+{
+ const GLushort *src = rb->GetPointer(ctx, rb, x, y);
+ GLushort *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + RCOMP] = src[i * 2];
+ dst[i * 4 + GCOMP] = src[i * 2 + 1];
+ dst[i * 4 + BCOMP] = 0;
+ dst[i * 4 + ACOMP] = 0xffff;
+ }
+}
+
+static void
+get_values_rg1616(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[], void *values)
+{
+ GLushort *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLshort *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i * 4 + RCOMP] = src[0];
+ dst[i * 4 + GCOMP] = src[1];
+ dst[i * 4 + BCOMP] = 0;
+ dst[i * 4 + ACOMP] = 0xffff;
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_INTENSITY_FLOAT32.
+ */
+static void
+get_row_i_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y, void *values)
+{
+ const GLfloat *src = rb->GetPointer(ctx, rb, x, y);
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + RCOMP] =
+ dst[i * 4 + GCOMP] =
+ dst[i * 4 + BCOMP] =
+ dst[i * 4 + ACOMP] = src[i];
+ }
+}
+
+static void
+get_values_i_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values)
+{
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i * 4 + RCOMP] =
+ dst[i * 4 + GCOMP] =
+ dst[i * 4 + BCOMP] =
+ dst[i * 4 + ACOMP] = src[0];
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_LUMINANCE_FLOAT32.
+ */
+static void
+get_row_l_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y, void *values)
+{
+ const GLfloat *src = rb->GetPointer(ctx, rb, x, y);
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + RCOMP] =
+ dst[i * 4 + GCOMP] =
+ dst[i * 4 + BCOMP] = src[i];
+ dst[i * 4 + ACOMP] = 1.0;
+ }
+}
+
+static void
+get_values_l_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values)
+{
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i * 4 + RCOMP] =
+ dst[i * 4 + GCOMP] =
+ dst[i * 4 + BCOMP] = src[0];
+ dst[i * 4 + ACOMP] = 1.0;
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_ALPHA_FLOAT32.
+ */
+static void
+get_row_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y, void *values)
+{
+ const GLfloat *src = rb->GetPointer(ctx, rb, x, y);
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + RCOMP] = 0.0;
+ dst[i * 4 + GCOMP] = 0.0;
+ dst[i * 4 + BCOMP] = 0.0;
+ dst[i * 4 + ACOMP] = src[i];
+ }
+}
+
+static void
+get_values_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values)
+{
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i * 4 + RCOMP] = 0.0;
+ dst[i * 4 + GCOMP] = 0.0;
+ dst[i * 4 + BCOMP] = 0.0;
+ dst[i * 4 + ACOMP] = src[0];
+ }
+}
+
+static void
+put_row_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const void *values, const GLubyte *mask)
+{
+ float *dst = rb->GetPointer(ctx, rb, x, y);
+ const float *src = values;
+ unsigned int i;
+
+ if (mask) {
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = src[i * 4 + ACOMP];
+ }
+ }
+ }
+ else {
+ for (i = 0; i < count; i++) {
+ dst[i] = src[i * 4 + ACOMP];
+ }
+ }
+}
+
+static void
+put_mono_row_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const void *value, const GLubyte *mask)
+{
+ float *dst = rb->GetPointer(ctx, rb, x, y);
+ const float *src = value;
+ unsigned int i;
+
+ if (mask) {
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = src[ACOMP];
+ }
+ }
+ }
+ else {
+ for (i = 0; i < count; i++) {
+ dst[i] = src[ACOMP];
+ }
+ }
+}
+
+static void
+put_values_a_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *values, const GLubyte *mask)
+{
+ const float *src = values;
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ float *dst = rb->GetPointer(ctx, rb, x[i], y[i]);
+
+ *dst = src[i * 4 + ACOMP];
+ }
+ }
+}
+
+static void
+put_mono_values_a_float32(struct gl_context *ctx,
+ struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ const float *src = value;
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ float *dst = rb->GetPointer(ctx, rb, x[i], y[i]);
+ *dst = src[ACOMP];
+ }
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_R_FLOAT32.
+ */
+static void
+get_row_r_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y, void *values)
+{
+ const GLfloat *src = rb->GetPointer(ctx, rb, x, y);
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + RCOMP] = src[i];
+ dst[i * 4 + GCOMP] = 0.0;
+ dst[i * 4 + BCOMP] = 0.0;
+ dst[i * 4 + ACOMP] = 1.0;
+ }
+}
+
+static void
+get_values_r_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values)
+{
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i * 4 + RCOMP] = src[0];
+ dst[i * 4 + GCOMP] = 0.0;
+ dst[i * 4 + BCOMP] = 0.0;
+ dst[i * 4 + ACOMP] = 1.0;
+ }
+}
+
+/**********************************************************************
+ * Functions for MESA_FORMAT_RG_FLOAT32.
+ */
+static void
+get_row_rg_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y, void *values)
+{
+ const GLfloat *src = rb->GetPointer(ctx, rb, x, y);
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + RCOMP] = src[i * 2 + 0];
+ dst[i * 4 + GCOMP] = src[i * 2 + 1];
+ dst[i * 4 + BCOMP] = 0.0;
+ dst[i * 4 + ACOMP] = 1.0;
+ }
+}
+
+static void
+get_values_rg_float32(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values)
+{
+ GLfloat *dst = values;
+ GLuint i;
+
+ for (i = 0; i < count; i++) {
+ const GLfloat *src = rb->GetPointer(ctx, rb, x[i], y[i]);
+ dst[i * 4 + RCOMP] = src[0];
+ dst[i * 4 + GCOMP] = src[1];
+ dst[i * 4 + BCOMP] = 0.0;
+ dst[i * 4 + ACOMP] = 1.0;
+ }
+}
+
+/**
+ * This is the default software fallback for gl_renderbuffer's span
+ * access functions.
+ *
+ * The assumptions are that rb->Data will be a pointer to (0,0), that pixels
+ * are packed in the type of rb->Format, and that subsequent rows appear
+ * rb->RowStride pixels later.
+ */
+void
+_mesa_set_renderbuffer_accessors(struct gl_renderbuffer *rb)
+{
+ rb->GetPointer = get_pointer_generic;
+ rb->GetRow = get_row_generic;
+
+ switch (rb->Format) {
+ case MESA_FORMAT_RGB888:
+ rb->DataType = GL_UNSIGNED_BYTE;
+ rb->GetPointer = get_pointer_ubyte3;
+ rb->GetRow = get_row_ubyte3;
+ rb->GetValues = get_values_ubyte3;
+ rb->PutRow = put_row_ubyte3;
+ rb->PutRowRGB = put_row_rgb_ubyte3;
+ rb->PutMonoRow = put_mono_row_ubyte3;
+ rb->PutValues = put_values_ubyte3;
+ rb->PutMonoValues = put_mono_values_ubyte3;
+ break;
+
+ case MESA_FORMAT_RGBA8888:
+ rb->DataType = GL_UNSIGNED_BYTE;
+ rb->GetValues = get_values_ubyte4;
+ rb->PutRow = put_row_ubyte4;
+ rb->PutRowRGB = put_row_rgb_ubyte4;
+ rb->PutMonoRow = put_mono_row_ubyte4;
+ rb->PutValues = put_values_ubyte4;
+ rb->PutMonoValues = put_mono_values_ubyte4;
+ break;
+
+ case MESA_FORMAT_R8:
+ rb->DataType = GL_UNSIGNED_BYTE;
+ rb->GetValues = get_values_r8;
+ rb->GetRow = get_row_r8;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = put_row_generic;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_RG88:
+ rb->DataType = GL_UNSIGNED_BYTE;
+ rb->GetValues = get_values_rg88;
+ rb->GetRow = get_row_rg88;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = put_row_generic;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_R16:
+ rb->DataType = GL_UNSIGNED_SHORT;
+ rb->GetValues = get_values_r16;
+ rb->GetRow = get_row_r16;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = put_row_generic;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_RG1616:
+ rb->DataType = GL_UNSIGNED_SHORT;
+ rb->GetValues = get_values_rg1616;
+ rb->GetRow = get_row_rg1616;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = put_row_generic;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_SIGNED_RGBA_16:
+ rb->DataType = GL_SHORT;
+ rb->GetValues = get_values_ushort4;
+ rb->PutRow = put_row_ushort4;
+ rb->PutRowRGB = put_row_rgb_ushort4;
+ rb->PutMonoRow = put_mono_row_ushort4;
+ rb->PutValues = put_values_ushort4;
+ rb->PutMonoValues = put_mono_values_ushort4;
+ break;
+
+#if 0
+ case MESA_FORMAT_A8:
+ rb->DataType = GL_UNSIGNED_BYTE;
+ rb->GetValues = get_values_alpha8;
+ rb->PutRow = put_row_alpha8;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_alpha8;
+ rb->PutValues = put_values_alpha8;
+ rb->PutMonoValues = put_mono_values_alpha8;
+ break;
+#endif
+
+ case MESA_FORMAT_S8:
+ rb->DataType = GL_UNSIGNED_BYTE;
+ rb->GetValues = get_values_ubyte;
+ rb->PutRow = put_row_ubyte;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_ubyte;
+ rb->PutValues = put_values_ubyte;
+ rb->PutMonoValues = put_mono_values_ubyte;
+ break;
+
+ case MESA_FORMAT_Z16:
+ rb->DataType = GL_UNSIGNED_SHORT;
+ rb->GetValues = get_values_ushort;
+ rb->PutRow = put_row_ushort;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_ushort;
+ rb->PutValues = put_values_ushort;
+ rb->PutMonoValues = put_mono_values_ushort;
+ break;
+
+ case MESA_FORMAT_Z32:
+ case MESA_FORMAT_X8_Z24:
+ case MESA_FORMAT_Z24_X8:
+ rb->DataType = GL_UNSIGNED_INT;
+ rb->GetValues = get_values_uint;
+ rb->PutRow = put_row_uint;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_uint;
+ rb->PutValues = put_values_uint;
+ rb->PutMonoValues = put_mono_values_uint;
+ break;
+
+ case MESA_FORMAT_Z24_S8:
+ case MESA_FORMAT_S8_Z24:
+ rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
+ rb->GetValues = get_values_uint;
+ rb->PutRow = put_row_uint;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_uint;
+ rb->PutValues = put_values_uint;
+ rb->PutMonoValues = put_mono_values_uint;
+ break;
+
+ case MESA_FORMAT_RGBA_FLOAT32:
+ rb->GetRow = get_row_generic;
+ rb->GetValues = get_values_generic;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_INTENSITY_FLOAT32:
+ rb->GetRow = get_row_i_float32;
+ rb->GetValues = get_values_i_float32;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_LUMINANCE_FLOAT32:
+ rb->GetRow = get_row_l_float32;
+ rb->GetValues = get_values_l_float32;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_ALPHA_FLOAT32:
+ rb->GetRow = get_row_a_float32;
+ rb->GetValues = get_values_a_float32;
+ rb->PutRow = put_row_a_float32;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_a_float32;
+ rb->PutValues = put_values_a_float32;
+ rb->PutMonoValues = put_mono_values_a_float32;
+ break;
+
+ case MESA_FORMAT_RG_FLOAT32:
+ rb->GetRow = get_row_rg_float32;
+ rb->GetValues = get_values_rg_float32;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ case MESA_FORMAT_R_FLOAT32:
+ rb->GetRow = get_row_r_float32;
+ rb->GetValues = get_values_r_float32;
+ rb->PutRow = put_row_generic;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = put_mono_row_generic;
+ rb->PutValues = put_values_generic;
+ rb->PutMonoValues = put_mono_values_generic;
+ break;
+
+ default:
+ break;
+ }
+}
+
+/**
+ * This is a software fallback for the gl_renderbuffer->AllocStorage
+ * function.
+ * Device drivers will typically override this function for the buffers
+ * which it manages (typically color buffers, Z and stencil).
+ * Other buffers (like software accumulation and aux buffers) which the driver
+ * doesn't manage can be handled with this function.
+ *
+ * This one multi-purpose function can allocate stencil, depth, accum, color
+ * or color-index buffers!
+ *
+ * This function also plugs in the appropriate GetPointer, Get/PutRow and
+ * Get/PutValues functions.
+ */
+GLboolean
+_mesa_soft_renderbuffer_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat,
+ GLuint width, GLuint height)
+{
+ switch (internalFormat) {
+ case GL_RGB:
+ case GL_R3_G3_B2:
+ case GL_RGB4:
+ case GL_RGB5:
+ case GL_RGB8:
+ case GL_RGB10:
+ case GL_RGB12:
+ case GL_RGB16:
+ rb->Format = MESA_FORMAT_RGB888;
+ break;
+ case GL_RGBA:
+ case GL_RGBA2:
+ case GL_RGBA4:
+ case GL_RGB5_A1:
+ case GL_RGBA8:
+#if 1
+ case GL_RGB10_A2:
+ case GL_RGBA12:
+#endif
+ rb->Format = MESA_FORMAT_RGBA8888;
+ break;
+ case GL_RGBA16:
+ case GL_RGBA16_SNORM:
+ /* for accum buffer */
+ rb->Format = MESA_FORMAT_SIGNED_RGBA_16;
+ break;
+#if 0
+ case GL_ALPHA8:
+ rb->Format = MESA_FORMAT_A8;
+ break;
+#endif
+ case GL_STENCIL_INDEX:
+ case GL_STENCIL_INDEX1_EXT:
+ case GL_STENCIL_INDEX4_EXT:
+ case GL_STENCIL_INDEX8_EXT:
+ case GL_STENCIL_INDEX16_EXT:
+ rb->Format = MESA_FORMAT_S8;
+ break;
+ case GL_DEPTH_COMPONENT:
+ case GL_DEPTH_COMPONENT16:
+ rb->Format = MESA_FORMAT_Z16;
+ break;
+ case GL_DEPTH_COMPONENT24:
+ rb->Format = MESA_FORMAT_X8_Z24;
+ break;
+ case GL_DEPTH_COMPONENT32:
+ rb->Format = MESA_FORMAT_Z32;
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ case GL_DEPTH24_STENCIL8_EXT:
+ rb->Format = MESA_FORMAT_Z24_S8;
+ break;
+ default:
+ /* unsupported format */
+ return GL_FALSE;
+ }
+
+ _mesa_set_renderbuffer_accessors(rb);
+
+ ASSERT(rb->DataType);
+ ASSERT(rb->GetPointer);
+ ASSERT(rb->GetRow);
+ ASSERT(rb->GetValues);
+ ASSERT(rb->PutRow);
+ ASSERT(rb->PutMonoRow);
+ ASSERT(rb->PutValues);
+ ASSERT(rb->PutMonoValues);
+
+ /* free old buffer storage */
+ if (rb->Data) {
+ free(rb->Data);
+ rb->Data = NULL;
+ }
+
+ rb->RowStride = width;
+
+ if (width > 0 && height > 0) {
+ /* allocate new buffer storage */
+ rb->Data = malloc(width * height * _mesa_get_format_bytes(rb->Format));
+
+ if (rb->Data == NULL) {
+ rb->Width = 0;
+ rb->Height = 0;
+ rb->RowStride = 0;
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "software renderbuffer allocation (%d x %d x %d)",
+ width, height, _mesa_get_format_bytes(rb->Format));
+ return GL_FALSE;
+ }
+ }
+
+ rb->Width = width;
+ rb->Height = height;
+ rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
+
+ if (rb->Name == 0 &&
+ internalFormat == GL_RGBA16_SNORM &&
+ rb->_BaseFormat == 0) {
+ /* NOTE: This is a special case just for accumulation buffers.
+ * This is a very limited use case- there's no snorm texturing or
+ * rendering going on.
+ */
+ rb->_BaseFormat = GL_RGBA;
+ }
+ else {
+ /* the internalFormat should have been error checked long ago */
+ ASSERT(rb->_BaseFormat);
+ }
+
+ return GL_TRUE;
+}
+
+
+
+/**********************************************************************/
+/**********************************************************************/
+/**********************************************************************/
+
+
+/**
+ * Here we utilize the gl_renderbuffer->Wrapper field to put an alpha
+ * buffer wrapper around an existing RGB renderbuffer (hw or sw).
+ *
+ * When PutRow is called (for example), we store the alpha values in
+ * this buffer, then pass on the PutRow call to the wrapped RGB
+ * buffer.
+ */
+
+
+static GLboolean
+alloc_storage_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb,
+ GLenum internalFormat, GLuint width, GLuint height)
+{
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->Format == MESA_FORMAT_A8);
+
+ /* first, pass the call to the wrapped RGB buffer */
+ if (!arb->Wrapped->AllocStorage(ctx, arb->Wrapped, internalFormat,
+ width, height)) {
+ return GL_FALSE;
+ }
+
+ /* next, resize my alpha buffer */
+ if (arb->Data) {
+ free(arb->Data);
+ }
+
+ arb->Data = malloc(width * height * sizeof(GLubyte));
+ if (arb->Data == NULL) {
+ arb->Width = 0;
+ arb->Height = 0;
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "software alpha buffer allocation");
+ return GL_FALSE;
+ }
+
+ arb->Width = width;
+ arb->Height = height;
+ arb->RowStride = width;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Delete an alpha_renderbuffer object, as well as the wrapped RGB buffer.
+ */
+static void
+delete_renderbuffer_alpha8(struct gl_renderbuffer *arb)
+{
+ if (arb->Data) {
+ free(arb->Data);
+ }
+ ASSERT(arb->Wrapped);
+ ASSERT(arb != arb->Wrapped);
+ arb->Wrapped->Delete(arb->Wrapped);
+ arb->Wrapped = NULL;
+ free(arb);
+}
+
+
+static void *
+get_pointer_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb,
+ GLint x, GLint y)
+{
+ return NULL; /* don't allow direct access! */
+}
+
+
+static void
+get_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count,
+ GLint x, GLint y, void *values)
+{
+ /* NOTE: 'values' is RGBA format! */
+ const GLubyte *src = (const GLubyte *) arb->Data + y * arb->RowStride + x;
+ GLubyte *dst = (GLubyte *) values;
+ GLuint i;
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->DataType == GL_UNSIGNED_BYTE);
+ /* first, pass the call to the wrapped RGB buffer */
+ arb->Wrapped->GetRow(ctx, arb->Wrapped, count, x, y, values);
+ /* second, fill in alpha values from this buffer! */
+ for (i = 0; i < count; i++) {
+ dst[i * 4 + 3] = src[i];
+ }
+}
+
+
+static void
+get_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ GLubyte *dst = (GLubyte *) values;
+ GLuint i;
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->DataType == GL_UNSIGNED_BYTE);
+ /* first, pass the call to the wrapped RGB buffer */
+ arb->Wrapped->GetValues(ctx, arb->Wrapped, count, x, y, values);
+ /* second, fill in alpha values from this buffer! */
+ for (i = 0; i < count; i++) {
+ const GLubyte *src = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i];
+ dst[i * 4 + 3] = *src;
+ }
+}
+
+
+static void
+put_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const GLubyte *src = (const GLubyte *) values;
+ GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x;
+ GLuint i;
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->DataType == GL_UNSIGNED_BYTE);
+ /* first, pass the call to the wrapped RGB buffer */
+ arb->Wrapped->PutRow(ctx, arb->Wrapped, count, x, y, values, mask);
+ /* second, store alpha in our buffer */
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst[i] = src[i * 4 + 3];
+ }
+ }
+}
+
+
+static void
+put_row_rgb_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const GLubyte *src = (const GLubyte *) values;
+ GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x;
+ GLuint i;
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->DataType == GL_UNSIGNED_BYTE);
+ /* first, pass the call to the wrapped RGB buffer */
+ arb->Wrapped->PutRowRGB(ctx, arb->Wrapped, count, x, y, values, mask);
+ /* second, store alpha in our buffer */
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ dst[i] = src[i * 4 + 3];
+ }
+ }
+}
+
+
+static void
+put_mono_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ const GLubyte val = ((const GLubyte *) value)[3];
+ GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x;
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->DataType == GL_UNSIGNED_BYTE);
+ /* first, pass the call to the wrapped RGB buffer */
+ arb->Wrapped->PutMonoRow(ctx, arb->Wrapped, count, x, y, value, mask);
+ /* second, store alpha in our buffer */
+ if (mask) {
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (mask[i]) {
+ dst[i] = val;
+ }
+ }
+ }
+ else {
+ memset(dst, val, count);
+ }
+}
+
+
+static void
+put_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count,
+ const GLint x[], const GLint y[],
+ const void *values, const GLubyte *mask)
+{
+ const GLubyte *src = (const GLubyte *) values;
+ GLuint i;
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->DataType == GL_UNSIGNED_BYTE);
+ /* first, pass the call to the wrapped RGB buffer */
+ arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, values, mask);
+ /* second, store alpha in our buffer */
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i];
+ *dst = src[i * 4 + 3];
+ }
+ }
+}
+
+
+static void
+put_mono_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ const GLubyte val = ((const GLubyte *) value)[3];
+ GLuint i;
+ ASSERT(arb != arb->Wrapped);
+ ASSERT(arb->DataType == GL_UNSIGNED_BYTE);
+ /* first, pass the call to the wrapped RGB buffer */
+ arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, value, mask);
+ /* second, store alpha in our buffer */
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i];
+ *dst = val;
+ }
+ }
+}
+
+
+static void
+copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src)
+{
+ ASSERT(dst->Format == MESA_FORMAT_A8);
+ ASSERT(src->Format == MESA_FORMAT_A8);
+ ASSERT(dst->Width == src->Width);
+ ASSERT(dst->Height == src->Height);
+ ASSERT(dst->RowStride == src->RowStride);
+
+ memcpy(dst->Data, src->Data, dst->RowStride * dst->Height * sizeof(GLubyte));
+}
+
+
+/**********************************************************************/
+/**********************************************************************/
+/**********************************************************************/
+
+
+/**
+ * Default GetPointer routine. Always return NULL to indicate that
+ * direct buffer access is not supported.
+ */
+static void *
+nop_get_pointer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLint x, GLint y)
+{
+ return NULL;
+}
+
+
+/**
+ * Initialize the fields of a gl_renderbuffer to default values.
+ */
+void
+_mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name)
+{
+ _glthread_INIT_MUTEX(rb->Mutex);
+
+ rb->ClassID = 0;
+ rb->Name = name;
+ rb->RefCount = 0;
+ rb->Delete = _mesa_delete_renderbuffer;
+
+ /* The rest of these should be set later by the caller of this function or
+ * the AllocStorage method:
+ */
+ rb->AllocStorage = NULL;
+
+ rb->Width = 0;
+ rb->Height = 0;
+ rb->InternalFormat = GL_NONE;
+ rb->Format = MESA_FORMAT_NONE;
+
+ rb->DataType = GL_NONE;
+ rb->Data = NULL;
+
+ /* Point back to ourself so that we don't have to check for Wrapped==NULL
+ * all over the drivers.
+ */
+ rb->Wrapped = rb;
+
+ rb->GetPointer = nop_get_pointer;
+ rb->GetRow = NULL;
+ rb->GetValues = NULL;
+ rb->PutRow = NULL;
+ rb->PutRowRGB = NULL;
+ rb->PutMonoRow = NULL;
+ rb->PutValues = NULL;
+ rb->PutMonoValues = NULL;
+}
+
+
+/**
+ * Allocate a new gl_renderbuffer object. This can be used for user-created
+ * renderbuffers or window-system renderbuffers.
+ */
+struct gl_renderbuffer *
+_mesa_new_renderbuffer(struct gl_context *ctx, GLuint name)
+{
+ struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer);
+ if (rb) {
+ _mesa_init_renderbuffer(rb, name);
+ }
+ return rb;
+}
+
+
+/**
+ * Delete a gl_framebuffer.
+ * This is the default function for renderbuffer->Delete().
+ */
+void
+_mesa_delete_renderbuffer(struct gl_renderbuffer *rb)
+{
+ if (rb->Data) {
+ free(rb->Data);
+ }
+ free(rb);
+}
+
+
+/**
+ * Allocate a software-based renderbuffer. This is called via the
+ * ctx->Driver.NewRenderbuffer() function when the user creates a new
+ * renderbuffer.
+ * This would not be used for hardware-based renderbuffers.
+ */
+struct gl_renderbuffer *
+_mesa_new_soft_renderbuffer(struct gl_context *ctx, GLuint name)
+{
+ struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name);
+ if (rb) {
+ rb->AllocStorage = _mesa_soft_renderbuffer_storage;
+ /* Normally, one would setup the PutRow, GetRow, etc functions here.
+ * But we're doing that in the _mesa_soft_renderbuffer_storage() function
+ * instead.
+ */
+ }
+ return rb;
+}
+
+
+/**
+ * Add software-based color renderbuffers to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+GLboolean
+_mesa_add_color_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint rgbBits, GLuint alphaBits,
+ GLboolean frontLeft, GLboolean backLeft,
+ GLboolean frontRight, GLboolean backRight)
+{
+ gl_buffer_index b;
+
+ if (rgbBits > 16 || alphaBits > 16) {
+ _mesa_problem(ctx,
+ "Unsupported bit depth in _mesa_add_color_renderbuffers");
+ return GL_FALSE;
+ }
+
+ assert(MAX_COLOR_ATTACHMENTS >= 4);
+
+ for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) {
+ struct gl_renderbuffer *rb;
+
+ if (b == BUFFER_FRONT_LEFT && !frontLeft)
+ continue;
+ else if (b == BUFFER_BACK_LEFT && !backLeft)
+ continue;
+ else if (b == BUFFER_FRONT_RIGHT && !frontRight)
+ continue;
+ else if (b == BUFFER_BACK_RIGHT && !backRight)
+ continue;
+
+ assert(fb->Attachment[b].Renderbuffer == NULL);
+
+ rb = _mesa_new_renderbuffer(ctx, 0);
+ if (!rb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer");
+ return GL_FALSE;
+ }
+
+ if (rgbBits <= 8) {
+ if (alphaBits)
+ rb->Format = MESA_FORMAT_RGBA8888;
+ else
+ rb->Format = MESA_FORMAT_RGB888;
+ }
+ else {
+ assert(rgbBits <= 16);
+ rb->Format = MESA_FORMAT_NONE; /*XXX RGBA16;*/
+ }
+ rb->InternalFormat = GL_RGBA;
+
+ rb->AllocStorage = _mesa_soft_renderbuffer_storage;
+ _mesa_add_renderbuffer(fb, b, rb);
+ }
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Add software-based alpha renderbuffers to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+GLboolean
+_mesa_add_alpha_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint alphaBits,
+ GLboolean frontLeft, GLboolean backLeft,
+ GLboolean frontRight, GLboolean backRight)
+{
+ gl_buffer_index b;
+
+ /* for window system framebuffers only! */
+ assert(fb->Name == 0);
+
+ if (alphaBits > 8) {
+ _mesa_problem(ctx,
+ "Unsupported bit depth in _mesa_add_alpha_renderbuffers");
+ return GL_FALSE;
+ }
+
+ assert(MAX_COLOR_ATTACHMENTS >= 4);
+
+ /* Wrap each of the RGB color buffers with an alpha renderbuffer.
+ */
+ for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) {
+ struct gl_renderbuffer *arb;
+
+ if (b == BUFFER_FRONT_LEFT && !frontLeft)
+ continue;
+ else if (b == BUFFER_BACK_LEFT && !backLeft)
+ continue;
+ else if (b == BUFFER_FRONT_RIGHT && !frontRight)
+ continue;
+ else if (b == BUFFER_BACK_RIGHT && !backRight)
+ continue;
+
+ /* the RGB buffer to wrap must already exist!! */
+ assert(fb->Attachment[b].Renderbuffer);
+
+ /* only GLubyte supported for now */
+ assert(fb->Attachment[b].Renderbuffer->DataType == GL_UNSIGNED_BYTE);
+
+ /* allocate alpha renderbuffer */
+ arb = _mesa_new_renderbuffer(ctx, 0);
+ if (!arb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating alpha buffer");
+ return GL_FALSE;
+ }
+
+ /* wrap the alpha renderbuffer around the RGB renderbuffer */
+ arb->Wrapped = fb->Attachment[b].Renderbuffer;
+
+ /* Set up my alphabuffer fields and plug in my functions.
+ * The functions will put/get the alpha values from/to RGBA arrays
+ * and then call the wrapped buffer's functions to handle the RGB
+ * values.
+ */
+ arb->InternalFormat = arb->Wrapped->InternalFormat;
+ arb->Format = MESA_FORMAT_A8;
+ arb->DataType = arb->Wrapped->DataType;
+ arb->AllocStorage = alloc_storage_alpha8;
+ arb->Delete = delete_renderbuffer_alpha8;
+ arb->GetPointer = get_pointer_alpha8;
+ arb->GetRow = get_row_alpha8;
+ arb->GetValues = get_values_alpha8;
+ arb->PutRow = put_row_alpha8;
+ arb->PutRowRGB = put_row_rgb_alpha8;
+ arb->PutMonoRow = put_mono_row_alpha8;
+ arb->PutValues = put_values_alpha8;
+ arb->PutMonoValues = put_mono_values_alpha8;
+
+ /* clear the pointer to avoid assertion/sanity check failure later */
+ fb->Attachment[b].Renderbuffer = NULL;
+
+ /* plug the alpha renderbuffer into the colorbuffer attachment */
+ _mesa_add_renderbuffer(fb, b, arb);
+ }
+
+ return GL_TRUE;
+}
+
+
+/**
+ * For framebuffers that use a software alpha channel wrapper
+ * created by _mesa_add_alpha_renderbuffer or _mesa_add_soft_renderbuffers,
+ * copy the back buffer alpha channel into the front buffer alpha channel.
+ */
+void
+_mesa_copy_soft_alpha_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb)
+{
+ if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer &&
+ fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer)
+ copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer,
+ fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
+
+
+ if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer &&
+ fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer)
+ copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer,
+ fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer);
+}
+
+
+/**
+ * Add a software-based depth renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+GLboolean
+_mesa_add_depth_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint depthBits)
+{
+ struct gl_renderbuffer *rb;
+
+ if (depthBits > 32) {
+ _mesa_problem(ctx,
+ "Unsupported depthBits in _mesa_add_depth_renderbuffer");
+ return GL_FALSE;
+ }
+
+ assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL);
+
+ rb = _mesa_new_renderbuffer(ctx, 0);
+ if (!rb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth buffer");
+ return GL_FALSE;
+ }
+
+ if (depthBits <= 16) {
+ rb->Format = MESA_FORMAT_Z16;
+ rb->InternalFormat = GL_DEPTH_COMPONENT16;
+ }
+ else if (depthBits <= 24) {
+ rb->Format = MESA_FORMAT_X8_Z24;
+ rb->InternalFormat = GL_DEPTH_COMPONENT24;
+ }
+ else {
+ rb->Format = MESA_FORMAT_Z32;
+ rb->InternalFormat = GL_DEPTH_COMPONENT32;
+ }
+
+ rb->AllocStorage = _mesa_soft_renderbuffer_storage;
+ _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb);
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Add a software-based stencil renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+GLboolean
+_mesa_add_stencil_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint stencilBits)
+{
+ struct gl_renderbuffer *rb;
+
+ if (stencilBits > 16) {
+ _mesa_problem(ctx,
+ "Unsupported stencilBits in _mesa_add_stencil_renderbuffer");
+ return GL_FALSE;
+ }
+
+ assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL);
+
+ rb = _mesa_new_renderbuffer(ctx, 0);
+ if (!rb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating stencil buffer");
+ return GL_FALSE;
+ }
+
+ assert(stencilBits <= 8);
+ rb->Format = MESA_FORMAT_S8;
+ rb->InternalFormat = GL_STENCIL_INDEX8;
+
+ rb->AllocStorage = _mesa_soft_renderbuffer_storage;
+ _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb);
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Add a software-based accumulation renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+GLboolean
+_mesa_add_accum_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint redBits, GLuint greenBits,
+ GLuint blueBits, GLuint alphaBits)
+{
+ struct gl_renderbuffer *rb;
+
+ if (redBits > 16 || greenBits > 16 || blueBits > 16 || alphaBits > 16) {
+ _mesa_problem(ctx,
+ "Unsupported accumBits in _mesa_add_accum_renderbuffer");
+ return GL_FALSE;
+ }
+
+ assert(fb->Attachment[BUFFER_ACCUM].Renderbuffer == NULL);
+
+ rb = _mesa_new_renderbuffer(ctx, 0);
+ if (!rb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer");
+ return GL_FALSE;
+ }
+
+ rb->Format = MESA_FORMAT_SIGNED_RGBA_16;
+ rb->InternalFormat = GL_RGBA16_SNORM;
+ rb->AllocStorage = _mesa_soft_renderbuffer_storage;
+ _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb);
+
+ return GL_TRUE;
+}
+
+
+
+/**
+ * Add a software-based aux renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ *
+ * NOTE: color-index aux buffers not supported.
+ */
+GLboolean
+_mesa_add_aux_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint colorBits, GLuint numBuffers)
+{
+ GLuint i;
+
+ if (colorBits > 16) {
+ _mesa_problem(ctx,
+ "Unsupported accumBits in _mesa_add_aux_renderbuffers");
+ return GL_FALSE;
+ }
+
+ assert(numBuffers <= MAX_AUX_BUFFERS);
+
+ for (i = 0; i < numBuffers; i++) {
+ struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, 0);
+
+ assert(fb->Attachment[BUFFER_AUX0 + i].Renderbuffer == NULL);
+
+ if (!rb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating aux buffer");
+ return GL_FALSE;
+ }
+
+ assert (colorBits <= 8);
+ rb->Format = MESA_FORMAT_RGBA8888;
+ rb->InternalFormat = GL_RGBA;
+
+ rb->AllocStorage = _mesa_soft_renderbuffer_storage;
+ _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb);
+ }
+ return GL_TRUE;
+}
+
+
+/**
+ * Create/attach software-based renderbuffers to the given framebuffer.
+ * This is a helper routine for device drivers. Drivers can just as well
+ * call the individual _mesa_add_*_renderbuffer() routines directly.
+ */
+void
+_mesa_add_soft_renderbuffers(struct gl_framebuffer *fb,
+ GLboolean color,
+ GLboolean depth,
+ GLboolean stencil,
+ GLboolean accum,
+ GLboolean alpha,
+ GLboolean aux)
+{
+ GLboolean frontLeft = GL_TRUE;
+ GLboolean backLeft = fb->Visual.doubleBufferMode;
+ GLboolean frontRight = fb->Visual.stereoMode;
+ GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode;
+
+ if (color) {
+ assert(fb->Visual.redBits == fb->Visual.greenBits);
+ assert(fb->Visual.redBits == fb->Visual.blueBits);
+ _mesa_add_color_renderbuffers(NULL, fb,
+ fb->Visual.redBits,
+ fb->Visual.alphaBits,
+ frontLeft, backLeft,
+ frontRight, backRight);
+ }
+
+ if (depth) {
+ assert(fb->Visual.depthBits > 0);
+ _mesa_add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits);
+ }
+
+ if (stencil) {
+ assert(fb->Visual.stencilBits > 0);
+ _mesa_add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits);
+ }
+
+ if (accum) {
+ assert(fb->Visual.accumRedBits > 0);
+ assert(fb->Visual.accumGreenBits > 0);
+ assert(fb->Visual.accumBlueBits > 0);
+ _mesa_add_accum_renderbuffer(NULL, fb,
+ fb->Visual.accumRedBits,
+ fb->Visual.accumGreenBits,
+ fb->Visual.accumBlueBits,
+ fb->Visual.accumAlphaBits);
+ }
+
+ if (aux) {
+ assert(fb->Visual.numAuxBuffers > 0);
+ _mesa_add_aux_renderbuffers(NULL, fb, fb->Visual.redBits,
+ fb->Visual.numAuxBuffers);
+ }
+
+ if (alpha) {
+ assert(fb->Visual.alphaBits > 0);
+ _mesa_add_alpha_renderbuffers(NULL, fb, fb->Visual.alphaBits,
+ frontLeft, backLeft,
+ frontRight, backRight);
+ }
+
+#if 0
+ if (multisample) {
+ /* maybe someday */
+ }
+#endif
+}
+
+
+/**
+ * Attach a renderbuffer to a framebuffer.
+ * \param bufferName one of the BUFFER_x tokens
+ */
+void
+_mesa_add_renderbuffer(struct gl_framebuffer *fb,
+ gl_buffer_index bufferName, struct gl_renderbuffer *rb)
+{
+ assert(fb);
+ assert(rb);
+ assert(bufferName < BUFFER_COUNT);
+
+ /* There should be no previous renderbuffer on this attachment point,
+ * with the exception of depth/stencil since the same renderbuffer may
+ * be used for both.
+ */
+ assert(bufferName == BUFFER_DEPTH ||
+ bufferName == BUFFER_STENCIL ||
+ fb->Attachment[bufferName].Renderbuffer == NULL);
+
+ /* winsys vs. user-created buffer cross check */
+ if (fb->Name) {
+ assert(rb->Name);
+ }
+ else {
+ assert(!rb->Name);
+ }
+
+ fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT;
+ fb->Attachment[bufferName].Complete = GL_TRUE;
+ _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb);
+}
+
+
+/**
+ * Remove the named renderbuffer from the given framebuffer.
+ * \param bufferName one of the BUFFER_x tokens
+ */
+void
+_mesa_remove_renderbuffer(struct gl_framebuffer *fb,
+ gl_buffer_index bufferName)
+{
+ struct gl_renderbuffer *rb;
+
+ assert(bufferName < BUFFER_COUNT);
+
+ rb = fb->Attachment[bufferName].Renderbuffer;
+ if (!rb)
+ return;
+
+ _mesa_reference_renderbuffer(&rb, NULL);
+
+ fb->Attachment[bufferName].Renderbuffer = NULL;
+}
+
+
+/**
+ * Set *ptr to point to rb. If *ptr points to another renderbuffer,
+ * dereference that buffer first. The new renderbuffer's refcount will
+ * be incremented. The old renderbuffer's refcount will be decremented.
+ * This is normally only called from the _mesa_reference_renderbuffer() macro
+ * when there's a real pointer change.
+ */
+void
+_mesa_reference_renderbuffer_(struct gl_renderbuffer **ptr,
+ struct gl_renderbuffer *rb)
+{
+ if (*ptr) {
+ /* Unreference the old renderbuffer */
+ GLboolean deleteFlag = GL_FALSE;
+ struct gl_renderbuffer *oldRb = *ptr;
+
+ _glthread_LOCK_MUTEX(oldRb->Mutex);
+ ASSERT(oldRb->RefCount > 0);
+ oldRb->RefCount--;
+ /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/
+ deleteFlag = (oldRb->RefCount == 0);
+ _glthread_UNLOCK_MUTEX(oldRb->Mutex);
+
+ if (deleteFlag) {
+ oldRb->Delete(oldRb);
+ }
+
+ *ptr = NULL;
+ }
+ assert(!*ptr);
+
+ if (rb) {
+ /* reference new renderbuffer */
+ _glthread_LOCK_MUTEX(rb->Mutex);
+ rb->RefCount++;
+ /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/
+ _glthread_UNLOCK_MUTEX(rb->Mutex);
+ *ptr = rb;
+ }
+}
|