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i965: Add surface format overrides for Gen6 gather

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Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Chris Forbes
2014-02-03 22:14:45 +13:00
parent 2b7bbd89e8
commit c2d51aaa11
1 changed files with 32 additions and 5 deletions
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37
src/mesa/drivers/dri/i965/brw_wm_surface_state.c
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@@ -282,15 +282,42 @@ brw_update_texture_surface(struct gl_context *ctx,
surf = brw_state_batch(brw, AUB_TRACE_SURFACE_STATE,
6 * 4, 32, surf_offset);
(void) for_gather; /* no w/a to apply for this gen */
uint32_t tex_format = translate_tex_format(brw, mt->format,
sampler->sRGBDecode);
if (for_gather) {
/* Sandybridge's gather4 message is broken for integer formats.
* To work around this, we pretend the surface is UNORM for
* 8 or 16-bit formats, and emit shader instructions to recover
* the real INT/UINT value. For 32-bit formats, we pretend
* the surface is FLOAT, and simply reinterpret the resulting
* bits.
*/
switch (tex_format) {
case BRW_SURFACEFORMAT_R8_SINT:
case BRW_SURFACEFORMAT_R8_UINT:
tex_format = BRW_SURFACEFORMAT_R8_UNORM;
break;
case BRW_SURFACEFORMAT_R16_SINT:
case BRW_SURFACEFORMAT_R16_UINT:
tex_format = BRW_SURFACEFORMAT_R16_UNORM;
break;
case BRW_SURFACEFORMAT_R32_SINT:
case BRW_SURFACEFORMAT_R32_UINT:
tex_format = BRW_SURFACEFORMAT_R32_FLOAT;
break;
default:
break;
}
}
surf[0] = (translate_tex_target(tObj->Target) << BRW_SURFACE_TYPE_SHIFT |
BRW_SURFACE_MIPMAPLAYOUT_BELOW << BRW_SURFACE_MIPLAYOUT_SHIFT |
BRW_SURFACE_CUBEFACE_ENABLES |
(translate_tex_format(brw,
mt->format,
sampler->sRGBDecode) <<
BRW_SURFACE_FORMAT_SHIFT));
tex_format << BRW_SURFACE_FORMAT_SHIFT);
surf[1] = intelObj->mt->region->bo->offset64 + intelObj->mt->offset; /* reloc */