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gallium: fix some surface usage bugs

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When a surface is created with GPU_WRITE that really means "GPU render"
and that can involve reads (blending).  Set surface usage to
PIPE_BUFFER_USAGE_CPU_READ + WRITE.  Fixes progs/demos/lodbias demo.

Also, mark texture as 'modified' when mapped for writing so that the tile
cache can know when to freshen a cached tile.  Fixes glTexSubImage2D().
This commit is contained in:
Brian Paul
2008-06-20 15:58:19 -06:00
parent 78791d1065
commit f38bb10969
3 changed files with 21 additions and 2 deletions
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11
src/gallium/drivers/softpipe/sp_texture.c
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@@ -207,12 +207,19 @@ softpipe_get_tex_surface(struct pipe_screen *screen,
* done with the CPU. Let's adjust the flags to take that into
* account.
*/
if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE)
ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE;
if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
/* GPU_WRITE means "render" and that can involve reads (blending) */
ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
}
if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
PIPE_BUFFER_USAGE_GPU_WRITE)) {
/* Mark the surface as dirty. The tile cache will look for this. */
spt->modified = TRUE;
}
pipe_texture_reference(&ps->texture, pt);
ps->face = face;