diff options
author | Kenneth Graunke <[email protected]> | 2011-04-03 01:39:28 -0700 |
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committer | Kenneth Graunke <[email protected]> | 2011-04-02 18:58:16 -0700 |
commit | 5d7fefb9afbcc6f1d58a92d07c390e6b912c3b00 (patch) | |
tree | 4d07a4deeda595d818853cf888bd033d5c60e3db /src/mesa | |
parent | a019dd0d6e5bba00e8ee7818e004ee42ca507102 (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.
NOTE: This is a candidate for the 7.10 branch.
Diffstat (limited to 'src/mesa')
-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 bea6b1841f5..cada1401821 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -1989,10 +1989,10 @@ fs_visitor::emit_interpolation_setup_gen6() emit(BRW_OPCODE_MOV, this->pixel_x, int_pixel_x); emit(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)); |