diff options
Diffstat (limited to 'src/mesa/swrast/s_readpix.c')
| -rw-r--r-- | src/mesa/swrast/s_readpix.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c index a7b25a46339..383d61ce06e 100644 --- a/src/mesa/swrast/s_readpix.c +++ b/src/mesa/swrast/s_readpix.c @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.5.2 + * Version: 6.5.3 * - * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2007 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"), @@ -54,7 +54,8 @@ read_index_pixels( GLcontext *ctx, struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; GLint i; - ASSERT(rb); + if (!rb) + return; /* width should never be > MAX_WIDTH since we did clipping earlier */ ASSERT(width <= MAX_WIDTH); @@ -91,6 +92,9 @@ read_depth_pixels( GLcontext *ctx, const GLboolean biasOrScale = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0; + if (!rb) + return; + /* clipping should have been done already */ ASSERT(x >= 0); ASSERT(y >= 0); @@ -99,8 +103,6 @@ read_depth_pixels( GLcontext *ctx, /* width should never be > MAX_WIDTH since we did clipping earlier */ ASSERT(width <= MAX_WIDTH); - ASSERT(rb); - if (type == GL_UNSIGNED_SHORT && fb->Visual.depthBits == 16 && !biasOrScale && !packing->SwapBytes) { /* Special case: directly read 16-bit unsigned depth values. */ @@ -171,7 +173,8 @@ read_stencil_pixels( GLcontext *ctx, struct gl_renderbuffer *rb = fb->_StencilBuffer; GLint j; - ASSERT(rb); + if (!rb) + return; /* width should never be > MAX_WIDTH since we did clipping earlier */ ASSERT(width <= MAX_WIDTH); @@ -195,6 +198,7 @@ read_stencil_pixels( GLcontext *ctx, /** * Optimized glReadPixels for particular pixel formats when pixel * scaling, biasing, mapping, etc. are disabled. + * \return GL_TRUE if success, GL_FALSE if unable to do the readpixels */ static GLboolean fast_read_rgba_pixels( GLcontext *ctx, @@ -207,6 +211,9 @@ fast_read_rgba_pixels( GLcontext *ctx, { struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; + if (!rb) + return GL_FALSE; + ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB); /* clipping should have already been done */ @@ -316,7 +323,8 @@ read_rgba_pixels( GLcontext *ctx, struct gl_framebuffer *fb = ctx->ReadBuffer; struct gl_renderbuffer *rb = fb->_ColorReadBuffer; - ASSERT(rb); + if (!rb) + return; if (type == GL_FLOAT && ((ctx->Color.ClampReadColor == GL_TRUE) || (ctx->Color.ClampReadColor == GL_FIXED_ONLY_ARB && @@ -457,8 +465,8 @@ read_depth_stencil_pixels(GLcontext *ctx, depthRb = ctx->ReadBuffer->_DepthBuffer; stencilRb = ctx->ReadBuffer->_StencilBuffer; - ASSERT(depthRb); - ASSERT(stencilRb); + if (!depthRb || !stencilRb) + return; depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; |