diff options
| author | Brian Paul <[email protected]> | 2009-12-07 09:00:57 -0700 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2009-12-07 09:00:59 -0700 |
| commit | 8ce17134431ec27666e8fba2fa4bd22ba3f3ed18 (patch) | |
| tree | a5ecdb8d6c2b9d0c6c0391bcb19d9f989c4bdb0a /src/mesa/state_tracker | |
| parent | 8468234bfa98be77cbceecc8e91325c00e4e424b (diff) | |
st/mesa: negate DDY to match GL semantics
This fixes the regression from commit 884007546c98b1779bf266ec5111b1e7e2b68b2e
Fixes bug 25456 (piglit derivs regression).
Diffstat (limited to 'src/mesa/state_tracker')
| -rw-r--r-- | src/mesa/state_tracker/st_mesa_to_tgsi.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c index 5e76f4db4eb..bf80274c444 100644 --- a/src/mesa/state_tracker/st_mesa_to_tgsi.c +++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c @@ -396,6 +396,23 @@ static void emit_swz( struct st_translate *t, } +/** + * Negate the value of DDY to match GL semantics where (0,0) is the + * lower-left corner of the window. + * Note that the GL_ARB_fragment_coord_conventions extension will + * effect this someday. + */ +static void emit_ddy( struct st_translate *t, + struct ureg_dst dst, + const struct prog_src_register *SrcReg ) +{ + struct ureg_program *ureg = t->ureg; + struct ureg_src src = translate_src( t, SrcReg ); + if(1) src = ureg_negate( src ); + ureg_DDY( ureg, dst, src ); +} + + static unsigned translate_opcode( unsigned op ) @@ -619,7 +636,9 @@ compile_instruction( ureg_MOV( ureg, dst[0], ureg_imm1f(ureg, 0.5) ); break; - + case OPCODE_DDY: + emit_ddy( t, dst[0], &inst->SrcReg[0] ); + break; default: ureg_insn( ureg, |