AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

r300: hw can handle per component negations in vertex shaders

Browse Source 
Reported-by: Nicolai Haehnle <nhaehnle@gmail.com>
This commit is contained in:
Maciej Cencora
2009-07-11 15:09:20 +02:00
parent 4efb9f053c
commit 4eff323731
1 changed files with 2 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mesa/drivers/dri/r300/r300_vertprog.c
+2 -25
View File
@@ -1388,32 +1388,9 @@ static int translateSUB(struct gl_program *prog, int pos)
static int translateSWZ(struct gl_program *prog, int pos)
{
struct prog_instruction *inst;
GLuint orig_negate, orig_writemask;
prog->Instructions[pos].Opcode = OPCODE_MOV;
inst = &prog->Instructions[pos];
orig_negate = inst->SrcReg[0].Negate;
orig_writemask = inst->DstReg.WriteMask;
inst->Opcode = OPCODE_MOV;
/* If all relevant components are either negated or not negated at the same time, we are ok.
*/
if ((orig_negate & orig_writemask) == 0 || (orig_negate & orig_writemask) == (NEGATE_XYZW & orig_writemask))
return 0;
_mesa_insert_instructions(prog, pos + 1, 1);
inst = &prog->Instructions[pos];
inst->DstReg.WriteMask = orig_writemask & (orig_negate ^ NEGATE_XYZW);
inst->SrcReg[0].Negate = NEGATE_NONE;
++inst;
*inst = *(inst-1);
inst->DstReg.WriteMask = orig_writemask & orig_negate;
inst->SrcReg[0].Negate = NEGATE_XYZW;
return 1;
return 0;
}
static int translateXPD(struct gl_program *prog, int pos)