diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c | 584 |
1 files changed, 0 insertions, 584 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c deleted file mode 100644 index dda35044a..000000000 --- a/nx-X11/extras/Mesa/src/mesa/swrast/s_readpix.c +++ /dev/null @@ -1,584 +0,0 @@ -/* - * 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 "bufferobj.h" -#include "colormac.h" -#include "convolve.h" -#include "context.h" -#include "feedback.h" -#include "image.h" -#include "macros.h" -#include "imports.h" -#include "pixel.h" - -#include "s_context.h" -#include "s_depth.h" -#include "s_span.h" -#include "s_stencil.h" - - - -/* - * Read a block of color index pixels. - */ -static void -read_index_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; - /* - SWcontext *swrast = SWRAST_CONTEXT(ctx); - */ - GLint i, readWidth; - - /* error checking */ - if (ctx->Visual.rgbMode) { - _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" ); - return; - } - - if (type != GL_BYTE && - type != GL_UNSIGNED_BYTE && - type != GL_SHORT && - type != GL_UNSIGNED_SHORT && - type != GL_INT && - type != GL_UNSIGNED_INT && - type != GL_FLOAT) { - _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(index type)"); - return; - } - - _swrast_use_read_buffer(ctx); - - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; - - /* process image row by row */ - for (i = 0; i < height; i++) { - GLuint index[MAX_WIDTH]; - GLvoid *dest; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - rb->GetRow(ctx, rb, readWidth, x, y + i, index); - - dest = _mesa_image_address2d(packing, pixels, width, height, - GL_COLOR_INDEX, type, i, 0); - - _mesa_pack_index_span(ctx, readWidth, type, dest, index, - &ctx->Pack, ctx->_ImageTransferState); - } - - _swrast_use_draw_buffer(ctx); -} - - - -/** - * Read pixels for format=GL_DEPTH_COMPONENT. - */ -static void -read_depth_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - struct gl_renderbuffer *rb - = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; - GLint readWidth; - GLboolean bias_or_scale; - - /* Error checking */ - if (ctx->ReadBuffer->Visual.depthBits <= 0 || !rb) { - /* No depth buffer */ - _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" ); - return; - } - - if (type != GL_BYTE && - type != GL_UNSIGNED_BYTE && - type != GL_SHORT && - type != GL_UNSIGNED_SHORT && - type != GL_INT && - type != GL_UNSIGNED_INT && - type != GL_FLOAT) { - _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(depth type)"); - return; - } - - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; - - bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0; - - if (type==GL_UNSIGNED_SHORT && ctx->ReadBuffer->Visual.depthBits == 16 - && !bias_or_scale && !packing->SwapBytes) { - /* Special case: directly read 16-bit unsigned depth values. */ - GLint j; - for (j=0;j<height;j++,y++) { - GLdepth depth[MAX_WIDTH]; - GLushort *dst = (GLushort*) _mesa_image_address2d(packing, pixels, - width, height, GL_DEPTH_COMPONENT, type, j, 0); - GLint i; - _swrast_read_depth_span(ctx, rb, width, x, y, depth); - for (i = 0; i < width; i++) - dst[i] = depth[i]; - } - } - else if (type==GL_UNSIGNED_INT && ctx->ReadBuffer->Visual.depthBits == 32 - && !bias_or_scale && !packing->SwapBytes) { - /* Special case: directly read 32-bit unsigned depth values. */ - GLint j; - for (j=0;j<height;j++,y++) { - GLdepth *dst = (GLdepth *) _mesa_image_address2d(packing, pixels, - width, height, GL_DEPTH_COMPONENT, type, j, 0); - _swrast_read_depth_span(ctx, rb, width, x, y, dst); - } - } - else { - /* General case (slower) */ - GLint j; - for (j=0;j<height;j++,y++) { - GLfloat depth[MAX_WIDTH]; - GLvoid *dest; - - _swrast_read_depth_span_float(ctx, rb, readWidth, x, y, depth); - - dest = _mesa_image_address2d(packing, pixels, width, height, - GL_DEPTH_COMPONENT, type, j, 0); - - _mesa_pack_depth_span(ctx, readWidth, (GLdepth *) dest, type, - depth, packing); - } - } -} - - -/** - * Read pixels for format=GL_STENCIL_INDEX. - */ -static void -read_stencil_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - struct gl_renderbuffer *rb - = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; - GLint j, readWidth; - - if (type != GL_BYTE && - type != GL_UNSIGNED_BYTE && - type != GL_SHORT && - type != GL_UNSIGNED_SHORT && - type != GL_INT && - type != GL_UNSIGNED_INT && - type != GL_FLOAT && - type != GL_BITMAP) { - _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(stencil type)"); - return; - } - - if (ctx->ReadBuffer->Visual.stencilBits <= 0 || !rb) { - /* No stencil buffer */ - _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" ); - return; - } - - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; - - /* process image row by row */ - for (j=0;j<height;j++,y++) { - GLvoid *dest; - GLstencil stencil[MAX_WIDTH]; - - _swrast_read_stencil_span(ctx, rb, readWidth, x, y, stencil); - - dest = _mesa_image_address2d(packing, pixels, width, height, - GL_STENCIL_INDEX, type, j, 0); - - _mesa_pack_stencil_span(ctx, readWidth, type, dest, stencil, packing); - } -} - - - -/** - * Optimized glReadPixels for particular pixel formats: - * GL_UNSIGNED_BYTE, GL_RGBA - * when pixel scaling, biasing and mapping are disabled. - */ -static GLboolean -read_fast_rgba_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; - /* can't do scale, bias, mapping, etc */ - if (ctx->_ImageTransferState) - return GL_FALSE; - - /* can't do fancy pixel packing */ - if (packing->Alignment != 1 || packing->SwapBytes || packing->LsbFirst) - return GL_FALSE; - - { - GLint srcX = x; - GLint srcY = y; - GLint readWidth = width; /* actual width read */ - GLint readHeight = height; /* actual height read */ - GLint skipPixels = packing->SkipPixels; - GLint skipRows = packing->SkipRows; - GLint rowLength; - - if (packing->RowLength > 0) - rowLength = packing->RowLength; - else - rowLength = width; - - /* - * Ready to read! - * The window region at (destX, destY) of size (readWidth, readHeight) - * will be read back. - * We'll write pixel data to buffer pointed to by "pixels" but we'll - * skip "skipRows" rows and skip "skipPixels" pixels/row. - */ -#if CHAN_BITS == 8 - if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) { -#elif CHAN_BITS == 16 - if (format == GL_RGBA && type == GL_UNSIGNED_SHORT) { -#else - if (0) { -#endif - GLchan *dest = (GLchan *) pixels - + (skipRows * rowLength + skipPixels) * 4; - GLint row; - - if (packing->Invert) { - /* start at top and go down */ - dest += (readHeight - 1) * rowLength * 4; - rowLength = -rowLength; - } - - ASSERT(rb->GetRow); - for (row=0; row<readHeight; row++) { - rb->GetRow(ctx, rb, readWidth, srcX, srcY, dest); - dest += rowLength * 4; - srcY++; - } - return GL_TRUE; - } - else { - /* can't do this format/type combination */ - return GL_FALSE; - } - } -} - - - -/* - * Read R, G, B, A, RGB, L, or LA pixels. - */ -static void -read_rgba_pixels( GLcontext *ctx, - GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_pixelstore_attrib *packing ) -{ - struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; - GLint readWidth; - - if (!rb) { - /* No readbuffer is OK with GL_EXT_framebuffer_object */ - return; - } - - /* do error checking on pixel type, format was already checked by caller */ - switch (type) { - case GL_UNSIGNED_BYTE: - case GL_BYTE: - case GL_UNSIGNED_SHORT: - case GL_SHORT: - case GL_UNSIGNED_INT: - case GL_INT: - case GL_FLOAT: - case GL_UNSIGNED_BYTE_3_3_2: - case GL_UNSIGNED_BYTE_2_3_3_REV: - case GL_UNSIGNED_SHORT_5_6_5: - case GL_UNSIGNED_SHORT_5_6_5_REV: - case GL_UNSIGNED_SHORT_4_4_4_4: - case GL_UNSIGNED_SHORT_4_4_4_4_REV: - case GL_UNSIGNED_SHORT_5_5_5_1: - case GL_UNSIGNED_SHORT_1_5_5_5_REV: - case GL_UNSIGNED_INT_8_8_8_8: - case GL_UNSIGNED_INT_8_8_8_8_REV: - case GL_UNSIGNED_INT_10_10_10_2: - case GL_UNSIGNED_INT_2_10_10_10_REV: - /* valid pixel type */ - break; - case GL_HALF_FLOAT_ARB: - if (!ctx->Extensions.ARB_half_float_pixel) { - _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" ); - return; - } - break; - default: - _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" ); - return; - } - - if (!_mesa_is_legal_format_and_type(ctx, format, type) || - format == GL_INTENSITY) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(format or type)"); - return; - } - - _swrast_use_read_buffer(ctx); - - /* Try optimized path first */ - if (read_fast_rgba_pixels( ctx, x, y, width, height, - format, type, pixels, packing )) { - - _swrast_use_draw_buffer(ctx); - return; /* done! */ - } - - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; - - - if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { - const GLuint transferOps = ctx->_ImageTransferState; - GLfloat *dest, *src, *tmpImage, *convImage; - GLint row; - - tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat)); - if (!tmpImage) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels"); - return; - } - convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat)); - if (!convImage) { - _mesa_free(tmpImage); - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels"); - return; - } - - /* read full RGBA, FLOAT image */ - dest = tmpImage; - for (row = 0; row < height; row++, y++) { - GLchan rgba[MAX_WIDTH][4]; - if (ctx->Visual.rgbMode) { - _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba); - } - else { - GLuint index[MAX_WIDTH]; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - rb->GetRow(ctx, rb, readWidth, x, y, index); - if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset !=0 ) { - _mesa_map_ci(ctx, readWidth, index); - } - _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba); - } - _mesa_pack_rgba_span_chan(ctx, readWidth, (const GLchan (*)[4]) rgba, - GL_RGBA, GL_FLOAT, dest, &ctx->DefaultPacking, - transferOps & IMAGE_PRE_CONVOLUTION_BITS); - dest += width * 4; - } - - /* do convolution */ - if (ctx->Pixel.Convolution2DEnabled) { - _mesa_convolve_2d_image(ctx, &readWidth, &height, tmpImage, convImage); - } - else { - ASSERT(ctx->Pixel.Separable2DEnabled); - _mesa_convolve_sep_image(ctx, &readWidth, &height, tmpImage, convImage); - } - _mesa_free(tmpImage); - - /* finish transfer ops and pack the resulting image */ - src = convImage; - for (row = 0; row < height; row++) { - GLvoid *dest; - dest = _mesa_image_address2d(packing, pixels, readWidth, height, - format, type, row, 0); - _mesa_pack_rgba_span_float(ctx, readWidth, - (const GLfloat (*)[4]) src, - format, type, dest, packing, - transferOps & IMAGE_POST_CONVOLUTION_BITS); - src += readWidth * 4; - } - } - else { - /* no convolution */ - GLint row; - for (row = 0; row < height; row++, y++) { - GLchan rgba[MAX_WIDTH][4]; - GLvoid *dst; - if (ctx->Visual.rgbMode) { - _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba); - } - else { - GLuint index[MAX_WIDTH]; - ASSERT(rb->DataType == GL_UNSIGNED_INT); - rb->GetRow(ctx, rb, readWidth, x, y, index); - if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) { - _mesa_map_ci(ctx, readWidth, index); - } - _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba); - } - dst = _mesa_image_address2d(packing, pixels, width, height, - format, type, row, 0); - if (ctx->Visual.redBits < CHAN_BITS || - ctx->Visual.greenBits < CHAN_BITS || - ctx->Visual.blueBits < CHAN_BITS) { - /* Requantize the color values into floating point and go from - * there. This fixes conformance failures with 16-bit color - * buffers, for example. - */ - DEFMARRAY(GLfloat, rgbaf, MAX_WIDTH, 4); /* mac 32k limitation */ - CHECKARRAY(rgbaf, return); /* mac 32k limitation */ - _mesa_chan_to_float_span(ctx, readWidth, - (CONST GLchan (*)[4]) rgba, rgbaf); - _mesa_pack_rgba_span_float(ctx, readWidth, - (CONST GLfloat (*)[4]) rgbaf, - format, type, dst, packing, - ctx->_ImageTransferState); - UNDEFARRAY(rgbaf); /* mac 32k limitation */ - } - else { - /* GLubytes are fine */ - _mesa_pack_rgba_span_chan(ctx, readWidth, (CONST GLchan (*)[4]) rgba, - format, type, dst, packing, - ctx->_ImageTransferState); - } - } - } - - _swrast_use_draw_buffer(ctx); -} - - -/** - * Software fallback routine for ctx->Driver.ReadPixels(). - * We wind up using the swrast->ReadSpan() routines to do the job. - */ -void -_swrast_ReadPixels( GLcontext *ctx, - GLint x, GLint y, GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *packing, - GLvoid *pixels ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - struct gl_pixelstore_attrib clippedPacking; - - if (swrast->NewState) - _swrast_validate_derived( ctx ); - - /* Do all needed clipping here, so that we can forget about it later */ - clippedPacking = *packing; - if (clippedPacking.RowLength == 0) { - clippedPacking.RowLength = width; - } - if (!_mesa_clip_readpixels(ctx, &x, &y, &width, &height, - &clippedPacking.SkipPixels, - &clippedPacking.SkipRows)) { - /* The ReadPixels region is totally outside the window bounds */ - return; - } - - if (clippedPacking.BufferObj->Name) { - /* pack into PBO */ - GLubyte *buf; - if (!_mesa_validate_pbo_access(2, &clippedPacking, width, height, 1, - format, type, pixels)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glReadPixels(invalid PBO access)"); - return; - } - buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - GL_WRITE_ONLY_ARB, - clippedPacking.BufferObj); - if (!buf) { - /* buffer is already mapped - that's an error */ - _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)"); - return; - } - pixels = ADD_POINTERS(buf, pixels); - } - - RENDER_START(swrast, ctx); - - switch (format) { - case GL_COLOR_INDEX: - read_index_pixels(ctx, x, y, width, height, type, pixels, - &clippedPacking); - break; - case GL_STENCIL_INDEX: - read_stencil_pixels(ctx, x,y, width,height, type, pixels, - &clippedPacking); - break; - case GL_DEPTH_COMPONENT: - read_depth_pixels(ctx, x, y, width, height, type, pixels, - &clippedPacking); - break; - case GL_RED: - case GL_GREEN: - case GL_BLUE: - case GL_ALPHA: - case GL_RGB: - case GL_LUMINANCE: - case GL_LUMINANCE_ALPHA: - case GL_RGBA: - case GL_BGR: - case GL_BGRA: - case GL_ABGR_EXT: - read_rgba_pixels(ctx, x, y, width, height, - format, type, pixels, &clippedPacking); - break; - default: - _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(format)" ); - /* don't return yet, clean-up */ - } - - RENDER_FINISH(swrast, ctx); - - if (clippedPacking.BufferObj->Name) { - /* done with PBO so unmap it now */ - ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - clippedPacking.BufferObj); - } -} |