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llvmpipe: Fix alignment.

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My understanding and actual implementation of how the pixels are being
fetch differed.

This fixes bug 57863.

Trivial.
This commit is contained in:
José Fonseca 2012-12-04 19:09:28 +00:00
parent 7d44d354bd
commit 294d8a71ef
1 changed files with 5 additions and 0 deletions
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5
src/gallium/drivers/llvmpipe/lp_state_fs.c
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@ -1337,7 +1337,12 @@ generate_unswizzled_blend(struct gallivm_state *gallivm,
mask_type.length = fs_type.length;
/* Compute the alignment of the destination pointer in bytes */
#if 0
dst_alignment = (block_width * out_format_desc->block.bits + 7)/(out_format_desc->block.width * 8);
#else
/* FIXME -- currently we're fetching pixels one by one, instead of row by row */
dst_alignment = (1 * out_format_desc->block.bits + 7)/(out_format_desc->block.width * 8);
#endif
/* Force power-of-two alignment by extracting only the least-significant-bit */
dst_alignment = 1 << (ffs(dst_alignment) - 1);
/* Resource base and stride pointers are aligned to 16 bytes, so that's the maximum alignment we can guarantee */