From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c | 408 +++++++++++++++++++++++++ 1 file changed, 408 insertions(+) create mode 100644 nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c') diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c new file mode 100644 index 000000000..a7dc8a3af --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_buffers.c @@ -0,0 +1,408 @@ +/* + * Mesa 3-D graphics library + * Version: 6.4.1 + * + * Copyright (C) 1999-2005 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. + */ + + +#include "glheader.h" +#include "colormac.h" +#include "macros.h" +#include "imports.h" +#include "mtypes.h" +#include "fbobject.h" + +#include "s_accum.h" +#include "s_context.h" +#include "s_depth.h" +#include "s_masking.h" +#include "s_stencil.h" + + +/** + * Clear the color buffer when glColorMask is in effect. + */ +static void +clear_rgba_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb) +{ + const GLint x = ctx->DrawBuffer->_Xmin; + const GLint y = ctx->DrawBuffer->_Ymin; + const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; + const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; + GLchan clearColor[4]; + GLint i; + + ASSERT(ctx->Visual.rgbMode); + ASSERT(rb->PutRow); + + CLAMPED_FLOAT_TO_CHAN(clearColor[RCOMP], ctx->Color.ClearColor[0]); + CLAMPED_FLOAT_TO_CHAN(clearColor[GCOMP], ctx->Color.ClearColor[1]); + CLAMPED_FLOAT_TO_CHAN(clearColor[BCOMP], ctx->Color.ClearColor[2]); + CLAMPED_FLOAT_TO_CHAN(clearColor[ACOMP], ctx->Color.ClearColor[3]); + + for (i = 0; i < height; i++) { + GLchan rgba[MAX_WIDTH][4]; + GLint j; + for (j = 0; j < width; j++) { + COPY_CHAN4(rgba[j], clearColor); + } + _swrast_mask_rgba_array( ctx, rb, width, x, y + i, rgba ); + rb->PutRow(ctx, rb, width, x, y + i, rgba, NULL); + } +} + + +/** + * Clear color index buffer with masking. + */ +static void +clear_ci_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb) +{ + const GLint x = ctx->DrawBuffer->_Xmin; + const GLint y = ctx->DrawBuffer->_Ymin; + const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; + const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; + GLuint span[MAX_WIDTH]; + GLubyte mask[MAX_WIDTH]; + GLint i, j; + + ASSERT(!ctx->Visual.rgbMode); + + MEMSET( mask, 1, width ); + for (i = 0; i < height;i++) { + for (j = 0; j < width;j++) { + span[j] = ctx->Color.ClearIndex; + } + _swrast_mask_ci_array(ctx, rb, width, x, y + i, span); + ASSERT(rb->PutRow); + ASSERT(rb->DataType == GL_UNSIGNED_INT); + rb->PutRow(ctx, rb, width, x, y + i, span, mask); + } +} + + +/** + * Clear an rgba color buffer without channel masking. + */ +static void +clear_rgba_buffer(GLcontext *ctx, struct gl_renderbuffer *rb) +{ + const GLint x = ctx->DrawBuffer->_Xmin; + const GLint y = ctx->DrawBuffer->_Ymin; + const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; + const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; + GLubyte clear8[4]; + GLushort clear16[4]; + GLvoid *clearVal; + GLint i; + + ASSERT(ctx->Visual.rgbMode); + + ASSERT(ctx->Color.ColorMask[0] && + ctx->Color.ColorMask[1] && + ctx->Color.ColorMask[2] && + ctx->Color.ColorMask[3]); + + ASSERT(rb->PutMonoRow); + + switch (rb->DataType) { + case GL_UNSIGNED_BYTE: + UNCLAMPED_FLOAT_TO_UBYTE(clear8[0], ctx->Color.ClearColor[0]); + UNCLAMPED_FLOAT_TO_UBYTE(clear8[1], ctx->Color.ClearColor[1]); + UNCLAMPED_FLOAT_TO_UBYTE(clear8[2], ctx->Color.ClearColor[2]); + UNCLAMPED_FLOAT_TO_UBYTE(clear8[3], ctx->Color.ClearColor[3]); + clearVal = clear8; + break; + case GL_UNSIGNED_SHORT: + UNCLAMPED_FLOAT_TO_USHORT(clear16[0], ctx->Color.ClearColor[0]); + UNCLAMPED_FLOAT_TO_USHORT(clear16[1], ctx->Color.ClearColor[1]); + UNCLAMPED_FLOAT_TO_USHORT(clear16[2], ctx->Color.ClearColor[2]); + UNCLAMPED_FLOAT_TO_USHORT(clear16[3], ctx->Color.ClearColor[3]); + clearVal = clear16; + break; + case GL_FLOAT: + clearVal = ctx->Color.ClearColor; + break; + default: + _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer"); + return; + } + + for (i = 0; i < height; i++) { + rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL); + } +} + + +/** + * Clear color index buffer without masking. + */ +static void +clear_ci_buffer(GLcontext *ctx, struct gl_renderbuffer *rb) +{ + const GLint x = ctx->DrawBuffer->_Xmin; + const GLint y = ctx->DrawBuffer->_Ymin; + const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; + const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; + GLubyte clear8; + GLushort clear16; + GLuint clear32; + GLvoid *clearVal; + GLint i; + + ASSERT(!ctx->Visual.rgbMode); + + ASSERT((ctx->Color.IndexMask & ((1 << ctx->Visual.indexBits) - 1)) + == (GLuint) ((1 << ctx->Visual.indexBits) - 1)); + + ASSERT(rb->PutMonoRow); + + /* setup clear value */ + switch (rb->DataType) { + case GL_UNSIGNED_BYTE: + clear8 = (GLubyte) ctx->Color.ClearIndex; + clearVal = &clear8; + break; + case GL_UNSIGNED_SHORT: + clear16 = (GLushort) ctx->Color.ClearIndex; + clearVal = &clear16; + break; + case GL_UNSIGNED_INT: + clear32 = ctx->Color.ClearIndex; + clearVal = &clear32; + break; + default: + _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer"); + return; + } + + for (i = 0; i < height; i++) + rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL); +} + + +/** + * Clear the front/back/left/right/aux color buffers. + * This function is usually only called if the device driver can't + * clear its own color buffers for some reason (such as with masking). + */ +static void +clear_color_buffers(GLcontext *ctx) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + GLboolean masking; + GLuint i; + + if (ctx->Visual.rgbMode) { + if (ctx->Color.ColorMask[0] && + ctx->Color.ColorMask[1] && + ctx->Color.ColorMask[2] && + ctx->Color.ColorMask[3]) { + masking = GL_FALSE; + } + else { + masking = GL_TRUE; + } + } + else { + const GLuint indexBits = (1 << ctx->Visual.indexBits) - 1; + if ((ctx->Color.IndexMask & indexBits) == indexBits) { + masking = GL_FALSE; + } + else { + masking = GL_TRUE; + } + } + + for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers[0]; i++) { + struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][i]; +#if OLD_RENDERBUFFER + /* SetBuffer will go away */ + if (swrast->Driver.SetBuffer) + swrast->Driver.SetBuffer(ctx, ctx->DrawBuffer, + ctx->DrawBuffer->_ColorDrawBit[0][i]); +#endif + + if (ctx->Visual.rgbMode) { + if (masking) { + clear_rgba_buffer_with_masking(ctx, rb); + } + else { + clear_rgba_buffer(ctx, rb); + } + } + else { + if (masking) { + clear_ci_buffer_with_masking(ctx, rb); + } + else { + clear_ci_buffer(ctx, rb); + } + } + } + + /* restore default read/draw buffer */ + _swrast_use_draw_buffer(ctx); +} + + +/** + * Called via the device driver's ctx->Driver.Clear() function if the + * device driver can't clear one or more of the buffers itself. + * \param mask bitwise-OR of DD_*_BIT flags. + * \param all if GL_TRUE, clear whole buffer, else clear specified region. + */ +void +_swrast_Clear(GLcontext *ctx, GLbitfield mask, + GLboolean all, GLint x, GLint y, GLint width, GLint height) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + (void) all; (void) x; (void) y; (void) width; (void) height; + +#ifdef DEBUG_FOO + { + const GLbitfield legalBits = + BUFFER_BIT_FRONT_LEFT | + BUFFER_BIT_FRONT_RIGHT | + BUFFER_BIT_BACK_LEFT | + BUFFER_BIT_BACK_RIGHT | + BUFFER_BIT_DEPTH | + BUFFER_BIT_STENCIL | + BUFFER_BIT_ACCUM | + BUFFER_BIT_AUX0 | + BUFFER_BIT_AUX1 | + BUFFER_BIT_AUX2 | + BUFFER_BIT_AUX3; + assert((mask & (~legalBits)) == 0); + } +#endif + + RENDER_START(swrast,ctx); + + /* do software clearing here */ + if (mask) { + if (mask & ctx->DrawBuffer->_ColorDrawBufferMask[0]) { + clear_color_buffers(ctx); + } + if (mask & BUFFER_BIT_DEPTH) { + struct gl_renderbuffer *rb + = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; + _swrast_clear_depth_buffer(ctx, rb); + } + if (mask & BUFFER_BIT_ACCUM) { + struct gl_renderbuffer *rb + = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer; + _swrast_clear_accum_buffer(ctx, rb); + } + if (mask & BUFFER_BIT_STENCIL) { + struct gl_renderbuffer *rb + = ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; + _swrast_clear_stencil_buffer(ctx, rb); + } + } + + RENDER_FINISH(swrast,ctx); +} + + +/* + * Fallback for ctx->Driver.DrawBuffer() + */ +void +_swrast_DrawBuffer( GLcontext *ctx, GLenum mode ) +{ + (void) mode; + _swrast_use_draw_buffer(ctx); +} + + +/* + * Fallback for ctx->Driver.DrawBuffers() + */ +void +_swrast_DrawBuffers( GLcontext *ctx, GLsizei n, const GLenum *buffers ) +{ + _swrast_use_draw_buffer(ctx); +} + + +/* + * Setup things so that we read/write spans from the user-designated + * read buffer (set via glReadPixels). We usually just have to call + * this for glReadPixels, glCopyPixels, etc. + */ +void +_swrast_use_read_buffer( GLcontext *ctx ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + /* Do this so the software-emulated alpha plane span functions work! */ + swrast->CurrentBufferBit = ctx->ReadBuffer->_ColorReadBufferMask; + /* Tell the device driver where to read/write spans */ + if (swrast->Driver.SetBuffer) + swrast->Driver.SetBuffer(ctx, ctx->ReadBuffer, swrast->CurrentBufferBit); +} + + +/* + * Setup things so that we read/write spans from the default draw buffer. + * This is the usual mode that Mesa's software rasterizer operates in. + */ +void +_swrast_use_draw_buffer( GLcontext *ctx ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + /* The user can specify rendering to zero, one, two, or four color + * buffers simultaneously with glDrawBuffer()! + * We don't expect the span/point/line/triangle functions to deal with + * that mess so we'll iterate over the multiple buffers as needed. + * But usually we only render to one color buffer at a time. + * We set ctx->Color._DriverDrawBuffer to that buffer and tell the + * device driver to use that buffer. + * Look in s_span.c's multi_write_rgba_span() function to see how + * we loop over multiple color buffers when needed. + */ + + if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_FRONT_LEFT) + swrast->CurrentBufferBit = BUFFER_BIT_FRONT_LEFT; + else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_BACK_LEFT) + swrast->CurrentBufferBit = BUFFER_BIT_BACK_LEFT; + else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_FRONT_RIGHT) + swrast->CurrentBufferBit = BUFFER_BIT_FRONT_RIGHT; + else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_BACK_RIGHT) + swrast->CurrentBufferBit = BUFFER_BIT_BACK_RIGHT; + else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX0) + swrast->CurrentBufferBit = BUFFER_BIT_AUX0; + else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX1) + swrast->CurrentBufferBit = BUFFER_BIT_AUX1; + else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX2) + swrast->CurrentBufferBit = BUFFER_BIT_AUX2; + else if (ctx->DrawBuffer->_ColorDrawBufferMask[0] & BUFFER_BIT_AUX3) + swrast->CurrentBufferBit = BUFFER_BIT_AUX3; + else + /* glDrawBuffer(GL_NONE) */ + swrast->CurrentBufferBit = BUFFER_BIT_FRONT_LEFT; /* we always have this buffer */ + + if (swrast->Driver.SetBuffer) + swrast->Driver.SetBuffer(ctx, ctx->DrawBuffer, swrast->CurrentBufferBit); +} -- cgit v1.2.3