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r600g: fix possible issue with stencil mipmap rendering 

Somehow I only hit this issue with my latest libdrm changes.
This won't be needed with DB texturing.

NOTE: This is a candidate for the 9.0 branch.
This commit is contained in:
Marek Olšák 2012-10-06 05:23:47 +02:00
parent 6fa22b840e
commit 9dfca930d7
1 changed files with 12 additions and 1 deletions
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13
src/gallium/drivers/r600/evergreen_state.c
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@ -1496,13 +1496,24 @@ static void evergreen_init_depth_surface(struct r600_context *rctx,
if (rtex->surface.flags & RADEON_SURF_SBUFFER) {
uint64_t stencil_offset = rtex->surface.stencil_offset;
unsigned stile_split = rtex->surface.stencil_tile_split;
unsigned i, stile_split = rtex->surface.stencil_tile_split;
stile_split = eg_tile_split(stile_split);
stencil_offset += r600_resource_va(screen, surf->base.texture);
stencil_offset += rtex->surface.level[level].offset / 4;
stencil_offset >>= 8;
/* We're guessing the stencil offset from the depth offset.
* Make sure each mipmap level has a unique offset. */
for (i = 1; i <= level; i++) {
/* If two levels have the same address, add 256
* to the offset of the smaller level. */
if ((rtex->surface.level[i-1].offset / 4) >> 8 ==
(rtex->surface.level[i].offset / 4) >> 8) {
stencil_offset++;
}
}
surf->db_stencil_base = stencil_offset;
surf->db_stencil_info = S_028044_FORMAT(V_028044_STENCIL_8) |
S_028044_TILE_SPLIT(stile_split);