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r300g: fix microtiling on RS6xx

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Getting tiling right has always been tricky.
There are so many subtle details...
This commit is contained in:
Marek Olšák 2010-08-01 16:42:53 +02:00
parent 9846b06271
commit a87cedbde0
1 changed files with 18 additions and 4 deletions
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22
src/gallium/drivers/r300/r300_texture_desc.c
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@ -136,13 +136,27 @@ static unsigned r300_texture_get_stride(struct r300_screen *screen,
stride = util_format_get_stride(desc->b.b.format, width);
/* Some IGPs need a minimum stride of 64 bytes, hmm...
* This doesn't seem to apply to tiled textures, according to r300c. */
if (!desc->microtile && !desc->macrotile[level] &&
/* Some IGPs need a minimum stride of 64 bytes, hmm... */
if (!desc->macrotile[level] &&
(screen->caps.family == CHIP_FAMILY_RS600 ||
screen->caps.family == CHIP_FAMILY_RS690 ||
screen->caps.family == CHIP_FAMILY_RS740)) {
return stride < 64 ? 64 : stride;
unsigned min_stride;
if (desc->microtile) {
unsigned tile_height =
r300_get_pixel_alignment(desc->b.b.format,
desc->b.b.nr_samples,
desc->microtile,
desc->macrotile[level],
DIM_HEIGHT);
min_stride = 64 / tile_height;
} else {
min_stride = 64;
}
return stride < min_stride ? min_stride : stride;
}
/* The alignment to 32 bytes is sort of implied by the layout... */