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swrast: restructure some glReadPixels() code

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This commit is contained in:
Brian Paul 2010-12-03 15:26:19 -07:00
parent 5fc2548fae
commit 40ee69b4f3
1 changed files with 24 additions and 27 deletions
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51
src/mesa/swrast/s_readpix.c
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@ -476,36 +476,33 @@ _swrast_ReadPixels( struct gl_context *ctx,
_swrast_validate_derived( ctx );
/* Do all needed clipping here, so that we can forget about it later */
if (!_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
/* The ReadPixels region is totally outside the window bounds */
swrast_render_finish(ctx);
return;
}
if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
if (!pixels)
return;
switch (format) {
case GL_STENCIL_INDEX:
read_stencil_pixels(ctx, x, y, width, height, type, pixels,
pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
if (pixels) {
switch (format) {
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_DEPTH_STENCIL_EXT:
read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
&clippedPacking);
break;
default:
/* all other formats should be color formats */
read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
&clippedPacking);
break;
case GL_DEPTH_COMPONENT:
read_depth_pixels(ctx, x, y, width, height, type, pixels,
&clippedPacking);
break;
case GL_DEPTH_STENCIL_EXT:
read_depth_stencil_pixels(ctx, x, y, width, height,
type, pixels, &clippedPacking);
break;
default:
/* all other formats should be color formats */
read_rgba_pixels(ctx, x, y, width, height,
format, type, pixels, &clippedPacking);
}
_mesa_unmap_pbo_dest(ctx, &clippedPacking);
}
}
swrast_render_finish(ctx);
_mesa_unmap_pbo_dest(ctx, &clippedPacking);
}