diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/mesa/swrast/s_readpix.c | 126 |
1 files changed, 63 insertions, 63 deletions
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c index 61ad2c252e..07e24d6cae 100644 --- a/src/mesa/swrast/s_readpix.c +++ b/src/mesa/swrast/s_readpix.c @@ -52,10 +52,7 @@ read_index_pixels( GLcontext *ctx, const struct gl_pixelstore_attrib *packing ) { struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; - /* - SWcontext *swrast = SWRAST_CONTEXT(ctx); - */ - GLint i, readWidth; + GLint i; /* error checking */ if (ctx->Visual.rgbMode) { @@ -74,20 +71,24 @@ read_index_pixels( GLcontext *ctx, return; } - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; + if (!rb) { + return; /* no readbuffer OK */ + } + + /* width should never be > MAX_WIDTH since we did clipping earlier */ + ASSERT(width <= MAX_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); + rb->GetRow(ctx, rb, width, 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, + _mesa_pack_index_span(ctx, width, type, dest, index, &ctx->Pack, ctx->_ImageTransferState); } } @@ -106,13 +107,15 @@ read_depth_pixels( GLcontext *ctx, { struct gl_renderbuffer *rb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; - GLint readWidth; GLboolean bias_or_scale; - if (!rb) { - /* no readbuffer - OK */ - return; - } + /* clipping should have been done already */ + ASSERT(x >= 0); + ASSERT(y >= 0); + ASSERT(x + width <= rb->Width); + ASSERT(y + height <= rb->Height); + /* width should never be > MAX_WIDTH since we did clipping earlier */ + ASSERT(width <= MAX_WIDTH); /* Error checking */ if (ctx->Visual.depthBits <= 0) { @@ -132,48 +135,49 @@ read_depth_pixels( GLcontext *ctx, return; } - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; + if (!rb) { + return; /* no readbuffer OK */ + } - bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0; + bias_or_scale = ctx->Pixel.DepthBias != 0.0 || ctx->Pixel.DepthScale != 1.0; - if (type==GL_UNSIGNED_SHORT && ctx->Visual.depthBits == 16 + if (type == GL_UNSIGNED_SHORT && ctx->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]; + ASSERT(rb->InternalFormat == GL_DEPTH_COMPONENT16); + ASSERT(rb->DataType == GL_UNSIGNED_SHORT); + for (j = 0; j < height; j++, y++) { + void *dest =_mesa_image_address2d(packing, pixels, width, height, + GL_DEPTH_COMPONENT, type, j, 0); + rb->GetRow(ctx, rb, width, x, y, dest); } } - else if (type==GL_UNSIGNED_INT && ctx->Visual.depthBits == 32 + else if (type == GL_UNSIGNED_INT && ctx->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); + ASSERT(rb->InternalFormat == GL_DEPTH_COMPONENT32); + ASSERT(rb->DataType == GL_UNSIGNED_INT); + for (j = 0; j < height; j++, y++) { + void *dest = _mesa_image_address2d(packing, pixels, width, height, + GL_DEPTH_COMPONENT, type, j, 0); + rb->GetRow(ctx, rb, width, x, y, dest); } } else { /* General case (slower) */ GLint j; - for (j=0;j<height;j++,y++) { + for (j = 0; j < height; j++, y++) { GLfloat depth[MAX_WIDTH]; GLvoid *dest; - _swrast_read_depth_span_float(ctx, rb, readWidth, x, y, depth); + _swrast_read_depth_span_float(ctx, rb, width, 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, + _mesa_pack_depth_span(ctx, width, (GLdepth *) dest, type, depth, packing); } } @@ -192,7 +196,7 @@ read_stencil_pixels( GLcontext *ctx, { struct gl_renderbuffer *rb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; - GLint j, readWidth; + GLint j; if (!rb) { /* no readbuffer - OK */ @@ -217,20 +221,20 @@ read_stencil_pixels( GLcontext *ctx, return; } - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; + /* width should never be > MAX_WIDTH since we did clipping earlier */ + ASSERT(width <= MAX_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); + _swrast_read_stencil_span(ctx, rb, width, 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); + _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing); } } @@ -250,6 +254,7 @@ read_fast_rgba_pixels( GLcontext *ctx, 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; @@ -324,10 +329,6 @@ read_rgba_pixels( GLcontext *ctx, const struct gl_pixelstore_attrib *packing ) { struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; - /* - SWcontext *swrast = SWRAST_CONTEXT(ctx); - */ - GLint readWidth; if (!rb) { /* No readbuffer is OK with GL_EXT_framebuffer_object */ @@ -380,9 +381,8 @@ read_rgba_pixels( GLcontext *ctx, return; /* done! */ } - /* XXX: width should never be > MAX_WIDTH since we did clipping earlier */ - readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; - + /* width should never be > MAX_WIDTH since we did clipping earlier */ + ASSERT(width <= MAX_WIDTH); if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { const GLuint transferOps = ctx->_ImageTransferState; @@ -406,18 +406,18 @@ read_rgba_pixels( GLcontext *ctx, 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); + _swrast_read_rgba_span(ctx, rb, width, x, y, rgba); } else { GLuint index[MAX_WIDTH]; ASSERT(rb->DataType == GL_UNSIGNED_INT); - rb->GetRow(ctx, rb, readWidth, x, y, index); + rb->GetRow(ctx, rb, width, x, y, index); if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset !=0 ) { - _mesa_map_ci(ctx, readWidth, index); + _mesa_map_ci(ctx, width, index); } - _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba); + _mesa_map_ci_to_rgba_chan(ctx, width, index, rgba); } - _mesa_pack_rgba_span_chan(ctx, readWidth, (const GLchan (*)[4]) rgba, + _mesa_pack_rgba_span_chan(ctx, width, (const GLchan (*)[4]) rgba, GL_RGBA, GL_FLOAT, dest, &ctx->DefaultPacking, transferOps & IMAGE_PRE_CONVOLUTION_BITS); dest += width * 4; @@ -425,11 +425,11 @@ read_rgba_pixels( GLcontext *ctx, /* do convolution */ if (ctx->Pixel.Convolution2DEnabled) { - _mesa_convolve_2d_image(ctx, &readWidth, &height, tmpImage, convImage); + _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage); } else { ASSERT(ctx->Pixel.Separable2DEnabled); - _mesa_convolve_sep_image(ctx, &readWidth, &height, tmpImage, convImage); + _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage); } _mesa_free(tmpImage); @@ -437,13 +437,13 @@ read_rgba_pixels( GLcontext *ctx, src = convImage; for (row = 0; row < height; row++) { GLvoid *dest; - dest = _mesa_image_address2d(packing, pixels, readWidth, height, + dest = _mesa_image_address2d(packing, pixels, width, height, format, type, row, 0); - _mesa_pack_rgba_span_float(ctx, readWidth, + _mesa_pack_rgba_span_float(ctx, width, (const GLfloat (*)[4]) src, format, type, dest, packing, transferOps & IMAGE_POST_CONVOLUTION_BITS); - src += readWidth * 4; + src += width * 4; } } else { @@ -453,16 +453,16 @@ read_rgba_pixels( GLcontext *ctx, GLchan rgba[MAX_WIDTH][4]; GLvoid *dst; if (ctx->Visual.rgbMode) { - _swrast_read_rgba_span(ctx, rb, readWidth, x, y, rgba); + _swrast_read_rgba_span(ctx, rb, width, x, y, rgba); } else { GLuint index[MAX_WIDTH]; ASSERT(rb->DataType == GL_UNSIGNED_INT); - rb->GetRow(ctx, rb, readWidth, x, y, index); + rb->GetRow(ctx, rb, width, x, y, index); if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) { - _mesa_map_ci(ctx, readWidth, index); + _mesa_map_ci(ctx, width, index); } - _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba); + _mesa_map_ci_to_rgba_chan(ctx, width, index, rgba); } dst = _mesa_image_address2d(packing, pixels, width, height, format, type, row, 0); @@ -474,16 +474,16 @@ read_rgba_pixels( GLcontext *ctx, * buffers, for example. */ GLfloat rgbaf[MAX_WIDTH][4]; - _mesa_chan_to_float_span(ctx, readWidth, + _mesa_chan_to_float_span(ctx, width, (CONST GLchan (*)[4]) rgba, rgbaf); - _mesa_pack_rgba_span_float(ctx, readWidth, + _mesa_pack_rgba_span_float(ctx, width, (CONST GLfloat (*)[4]) rgbaf, format, type, dst, packing, ctx->_ImageTransferState); } else { /* GLubytes are fine */ - _mesa_pack_rgba_span_chan(ctx, readWidth, (CONST GLchan (*)[4]) rgba, + _mesa_pack_rgba_span_chan(ctx, width, (CONST GLchan (*)[4]) rgba, format, type, dst, packing, ctx->_ImageTransferState); } @@ -546,7 +546,7 @@ _swrast_ReadPixels( GLcontext *ctx, &clippedPacking); break; case GL_STENCIL_INDEX: - read_stencil_pixels(ctx, x,y, width,height, type, pixels, + read_stencil_pixels(ctx, x, y, width, height, type, pixels, &clippedPacking); break; case GL_DEPTH_COMPONENT: |