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st/mesa: Use PIPE_USAGE_STAGING for GL_STATIC/DYNAMIC/STREAM_READ buffers 

Such buffers can only be useful by reading from them with the CPU, so we
need to make sure CPU reads are fast.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=84178
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Cc: mesa-stable@lists.freedesktop.org
This commit is contained in:
Michel Dänzer 2014-09-25 15:29:56 +09:00 committed by Michel Dänzer
parent 9caa5c3b13
commit 7e55c3b352
1 changed files with 5 additions and 3 deletions
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8
src/mesa/state_tracker/st_cb_bufferobjects.c
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@ -246,21 +246,23 @@ st_bufferobj_data(struct gl_context *ctx,
/* BufferData */
switch (usage) {
case GL_STATIC_DRAW:
case GL_STATIC_READ:
case GL_STATIC_COPY:
default:
pipe_usage = PIPE_USAGE_DEFAULT;
break;
case GL_DYNAMIC_DRAW:
case GL_DYNAMIC_READ:
case GL_DYNAMIC_COPY:
pipe_usage = PIPE_USAGE_DYNAMIC;
break;
case GL_STREAM_DRAW:
case GL_STREAM_READ:
case GL_STREAM_COPY:
pipe_usage = PIPE_USAGE_STREAM;
break;
case GL_STATIC_READ:
case GL_DYNAMIC_READ:
case GL_STREAM_READ:
pipe_usage = PIPE_USAGE_STAGING;
break;
}
}