diff options
author | Kenneth Graunke <kenneth@whitecape.org> | 2011-04-03 01:39:28 -0700 |
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committer | Kenneth Graunke <kenneth@whitecape.org> | 2011-04-11 13:21:53 -0700 |
commit | 6c7a5d52ee04a6761acf64cd7b53f94deb547576 (patch) | |
tree | d07300f1ca1f7d62b4139ac3d9e9367c9814d6d3 | |
parent | 3c405079fdb639164bd57e04dc9e6d1b08411137 (diff) |
i965/fs: Switch W and 1/W in Sandybridge interpolation setup.
Various documentation mentions that "W" is handed to the WM stage,
but further digging seems to indicate that they really mean 1/W.
The code here is still unclear, but changing this fixes piglit
test "fragcoord_w" on Sandybridge as well as a Khronos ES2 conformance
test. I also tested 3DMarkMobile ES2.0's taiji and hoverjet demos, as
well as Nexuiz, just to be safe.
(cherry-picked from commit 5d7fefb9afbcc6f1d58a92d07c390e6b912c3b00)
-rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 524dfaa1bbc..b38a2900fba 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -2004,10 +2004,10 @@ fs_visitor::emit_interpolation_setup_gen6() emit(fs_inst(BRW_OPCODE_MOV, this->pixel_x, int_pixel_x)); emit(fs_inst(BRW_OPCODE_MOV, this->pixel_y, int_pixel_y)); - this->current_annotation = "compute 1/pos.w"; - this->wpos_w = fs_reg(brw_vec8_grf(c->source_w_reg, 0)); - this->pixel_w = fs_reg(this, glsl_type::float_type); - emit_math(FS_OPCODE_RCP, this->pixel_w, wpos_w); + this->current_annotation = "compute pos.w"; + this->pixel_w = fs_reg(brw_vec8_grf(c->source_w_reg, 0)); + this->wpos_w = fs_reg(this, glsl_type::float_type); + emit_math(FS_OPCODE_RCP, this->wpos_w, this->pixel_w); this->delta_x = fs_reg(brw_vec8_grf(2, 0)); this->delta_y = fs_reg(brw_vec8_grf(3, 0)); |