diff options
Diffstat (limited to 'src/mesa/state_tracker/st_mesa_to_tgsi.c')
| -rw-r--r-- | src/mesa/state_tracker/st_mesa_to_tgsi.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c index 5e8e61135e..1611d53e2f 100644 --- a/src/mesa/state_tracker/st_mesa_to_tgsi.c +++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c @@ -278,7 +278,7 @@ static struct ureg_src swizzle_4v( struct ureg_src src, /** - * Translate SWZ instructions into a single MAD. EG: + * Translate a SWZ instruction into a MOV, MUL or MAD instruction. EG: * * SWZ dst, src.x-y10 * @@ -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 ); + 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, |