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st/mesa: always allocate pack/unpack buffers as staging

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Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
This commit is contained in:
Marek Olšák 2019-08-27 16:38:05 -04:00
parent 3f840e5ccd
commit 7f6b9baee2
1 changed files with 6 additions and 8 deletions
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14
src/mesa/state_tracker/st_cb_bufferobjects.c
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@ -245,6 +245,11 @@ buffer_usage(GLenum target, GLboolean immutable,
}
}
else {
/* These are often read by the CPU, so enable CPU caches. */
if (target == GL_PIXEL_PACK_BUFFER ||
target == GL_PIXEL_UNPACK_BUFFER)
return PIPE_USAGE_STAGING;
/* BufferData */
switch (usage) {
case GL_DYNAMIC_DRAW:
@ -252,14 +257,7 @@ buffer_usage(GLenum target, GLboolean immutable,
return PIPE_USAGE_DYNAMIC;
case GL_STREAM_DRAW:
case GL_STREAM_COPY:
/* XXX: Remove this test and fall-through when we have PBO unpacking
* acceleration. Right now, PBO unpacking is done by the CPU, so we
* have to make sure CPU reads are fast.
*/
if (target != GL_PIXEL_UNPACK_BUFFER_ARB) {
return PIPE_USAGE_STREAM;
}
/* fall through */
return PIPE_USAGE_STREAM;
case GL_STATIC_READ:
case GL_DYNAMIC_READ:
case GL_STREAM_READ: