From f1ae5d4b4471108049080b34c482a083ae74860a Mon Sep 17 00:00:00 2001
From: Corbin Simpson <MostAwesomeDude@gmail.com>
Date: Sat, 14 Jun 2008 19:32:33 -0700
Subject: [PATCH] r5xx: Enable fragment.position, partial ARB_shadow. I don't
 like PROGRAM_BUILTIN; could we either patch Mesa or just use a different
 constant?

---
 src/mesa/drivers/dri/r300/r500_fragprog.c     | 18 +++++------
 .../drivers/dri/r300/r500_fragprog_emit.c     | 30 +++++++++++--------
 2 files changed, 25 insertions(+), 23 deletions(-)

diff --git a/src/mesa/drivers/dri/r300/r500_fragprog.c b/src/mesa/drivers/dri/r300/r500_fragprog.c
index 0483c09ba07..5d72ec2784f 100644
--- a/src/mesa/drivers/dri/r300/r500_fragprog.c
+++ b/src/mesa/drivers/dri/r300/r500_fragprog.c
@@ -65,21 +65,17 @@ static GLboolean transform_TEX(
 			tgt = radeonClauseInsertInstructions(context->compiler, context->dest,
 				context->dest->NumInstructions, 1);
 
-			tgt->Opcode = OPCODE_MAD;
-			tgt->DstReg = inst.DstReg;
+			tgt->Opcode = OPCODE_MOV;
+			tgt->DstReg.File = inst.DstReg.File;
+			tgt->DstReg.Index = inst.DstReg.Index;
+			tgt->DstReg.WriteMask = inst.DstReg.WriteMask;
 			tgt->SrcReg[0].File = PROGRAM_BUILTIN;
-			tgt->SrcReg[0].Swizzle = SWIZZLE_0000;
-			tgt->SrcReg[1].File = PROGRAM_BUILTIN;
-			tgt->SrcReg[1].Swizzle = SWIZZLE_0000;
-			tgt->SrcReg[2].File = PROGRAM_BUILTIN;
-			tgt->SrcReg[2].Swizzle = comparefunc == GL_ALWAYS ? SWIZZLE_1111 : SWIZZLE_0000;
+			tgt->SrcReg[0].Swizzle = comparefunc == GL_ALWAYS ? SWIZZLE_1111 : SWIZZLE_0000;
 			return GL_TRUE;
 		}
 
-		int tempreg = radeonCompilerAllocateTemporary(context->compiler);
-
 		inst.DstReg.File = PROGRAM_TEMPORARY;
-		inst.DstReg.Index = tempreg;
+		inst.DstReg.Index = radeonCompilerAllocateTemporary(context->compiler);
 		inst.DstReg.WriteMask = WRITEMASK_XYZW;
 	}
 
@@ -317,7 +313,7 @@ void r500TranslateFragmentShader(r300ContextPtr r300,
 
 		radeonCompilerInit(&compiler.compiler, r300->radeon.glCtx, &fp->mesa_program.Base);
 
-		/* insert_WPOS_trailer(&compiler); */
+		insert_WPOS_trailer(&compiler);
 
 		struct radeon_program_transformation transformations[1] = {
 			{ &transform_TEX, &compiler }
diff --git a/src/mesa/drivers/dri/r300/r500_fragprog_emit.c b/src/mesa/drivers/dri/r300/r500_fragprog_emit.c
index 59c90486531..e1ad342690b 100644
--- a/src/mesa/drivers/dri/r300/r500_fragprog_emit.c
+++ b/src/mesa/drivers/dri/r300/r500_fragprog_emit.c
@@ -323,6 +323,9 @@ static GLuint make_src(struct r500_pfs_compile_state *cs, struct prog_src_regist
 		reg = emit_const4fv(cs,
 			cs->compiler->fp->mesa_program.Base.Parameters->ParameterValues[src.Index]);
 		break;
+	case PROGRAM_BUILTIN:
+		reg = 0x0;
+		break;
 	default:
 		ERROR("Can't handle src.File %x\n", src.File);
 		reg = 0x0;
@@ -335,18 +338,21 @@ static GLuint make_dest(struct r500_pfs_compile_state *cs, struct prog_dst_regis
 	PROG_CODE;
 	GLuint reg;
 	switch (dest.File) {
-		case PROGRAM_TEMPORARY:
-			reg = dest.Index + code->temp_reg_offset;
-			break;
-		case PROGRAM_OUTPUT:
-			/* Eventually we may need to handle multiple
-			 * rendering targets... */
-			reg = dest.Index;
-			break;
-		default:
-			ERROR("Can't handle dest.File %x\n", dest.File);
-			reg = 0x0;
-			break;
+	case PROGRAM_TEMPORARY:
+		reg = dest.Index + code->temp_reg_offset;
+		break;
+	case PROGRAM_OUTPUT:
+		/* Eventually we may need to handle multiple
+			* rendering targets... */
+		reg = dest.Index;
+		break;
+	case PROGRAM_BUILTIN:
+		reg = 0x0;
+		break;
+	default:
+		ERROR("Can't handle dest.File %x\n", dest.File);
+		reg = 0x0;
+		break;
 	}
 	return reg;
 }