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PBO support for glGetCompressedTexImage().

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This commit is contained in:
Brian Paul 2004-10-31 16:35:06 +00:00
parent b46712ca9d
commit 1c86813922
1 changed files with 37 additions and 2 deletions
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39
src/mesa/main/teximage.c
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@ -1975,8 +1975,12 @@ _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
return;
}
/* XXX - someday the rest of this function should be moved into a
* fallback routine called via ctx->Driver.GetTexImage()
*/
if (ctx->Pack.BufferObj->Name) {
/* pack texture imaage into a PBO */
/* pack texture image into a PBO */
GLubyte *buf;
if (!_mesa_validate_pbo_access(&ctx->Pack, texImage->Width,
texImage->Height, texImage->Depth,
@ -3384,9 +3388,40 @@ _mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
return;
}
if (!img)
/* XXX - someday the rest of this function should be moved into a
* fallback routine called via ctx->Driver.GetCompressedTexImage()
*/
if (ctx->Pack.BufferObj->Name) {
/* pack texture image into a PBO */
GLubyte *buf;
if ((const GLubyte *) img + texImage->CompressedSize >
(const GLubyte *) ctx->Pack.BufferObj->Size) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTexImage(invalid PBO access)");
return;
}
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
GL_WRITE_ONLY_ARB,
ctx->Pack.BufferObj);
if (!buf) {
/* buffer is already mapped - that's an error */
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetCompressedTexImage(PBO is mapped)");
return;
}
img = ADD_POINTERS(buf, img);
}
else if (!img) {
/* not an error */
return;
}
/* just memcpy, no pixelstore or pixel transfer */
MEMCPY(img, texImage->Data, texImage->CompressedSize);
if (ctx->Pack.BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
ctx->Pack.BufferObj);
}
}