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authorBrian Paul <[email protected]>2009-06-17 07:42:49 -0600
committerBrian Paul <[email protected]>2009-06-17 09:58:29 -0600
commitec6ad7ba3ce4fa71620642ddde06cf843d1c8d54 (patch)
tree97a3f48ba41a2a1935e6c3ba3647b768ce08b8ae
parentf806a0336153ec211441a23da0eb8e763e001b02 (diff)
mesa: added _mesa_postprocess_program() to aid shader debugging
-rw-r--r--src/mesa/shader/program.c58
-rw-r--r--src/mesa/shader/program.h2
2 files changed, 60 insertions, 0 deletions
diff --git a/src/mesa/shader/program.c b/src/mesa/shader/program.c
index d270bf9e1c3..b56308b0297 100644
--- a/src/mesa/shader/program.c
+++ b/src/mesa/shader/program.c
@@ -820,3 +820,61 @@ _mesa_find_free_register(const struct gl_program *prog, GLuint regFile)
return -1;
}
+
+
+
+/**
+ * "Post-process" a GPU program. This is intended to be used for debugging.
+ * Example actions include no-op'ing instructions or changing instruction
+ * behaviour.
+ */
+void
+_mesa_postprocess_program(GLcontext *ctx, struct gl_program *prog)
+{
+ static const GLfloat white[4] = { 0.5, 0.5, 0.5, 0.5 };
+ GLuint i;
+ GLuint whiteSwizzle;
+ GLint whiteIndex = _mesa_add_unnamed_constant(prog->Parameters,
+ white, 4, &whiteSwizzle);
+
+ for (i = 0; i < prog->NumInstructions; i++) {
+ struct prog_instruction *inst = prog->Instructions + i;
+ const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
+
+ (void) n;
+
+ if (_mesa_is_tex_instruction(inst->Opcode)) {
+#if 0
+ /* replace TEX/TXP/TXB with MOV */
+ inst->Opcode = OPCODE_MOV;
+ inst->DstReg.WriteMask = WRITEMASK_XYZW;
+ inst->SrcReg[0].Swizzle = SWIZZLE_XYZW;
+ inst->SrcReg[0].Negate = NEGATE_NONE;
+#endif
+
+#if 0
+ /* disable shadow texture mode */
+ inst->TexShadow = 0;
+#endif
+ }
+
+ if (inst->Opcode == OPCODE_TXP) {
+#if 0
+ inst->Opcode = OPCODE_MOV;
+ inst->DstReg.WriteMask = WRITEMASK_XYZW;
+ inst->SrcReg[0].File = PROGRAM_CONSTANT;
+ inst->SrcReg[0].Index = whiteIndex;
+ inst->SrcReg[0].Swizzle = SWIZZLE_XYZW;
+ inst->SrcReg[0].Negate = NEGATE_NONE;
+#endif
+#if 0
+ inst->TexShadow = 0;
+#endif
+#if 0
+ inst->Opcode = OPCODE_TEX;
+ inst->TexShadow = 0;
+#endif
+ }
+
+ }
+}
diff --git a/src/mesa/shader/program.h b/src/mesa/shader/program.h
index 48176162c35..56a4191f578 100644
--- a/src/mesa/shader/program.h
+++ b/src/mesa/shader/program.h
@@ -122,6 +122,8 @@ _mesa_combine_programs(GLcontext *ctx,
extern GLint
_mesa_find_free_register(const struct gl_program *prog, GLuint regFile);
+extern void
+_mesa_postprocess_program(GLcontext *ctx, struct gl_program *prog);
#endif /* PROGRAM_H */