r300: Added support for Back Facing Color.

src/mesa/drivers/dri/r300/r300_emit.c

@@ -299,13 +299,13 @@ GLuint r300VAPOutputCntl0(GLcontext * ctx, GLuint OutputsWritten)
 	if (OutputsWritten & (1 << VERT_RESULT_COL1))
 		ret |= R300_VAP_OUTPUT_VTX_FMT_0__COLOR_1_PRESENT;
 
-#if 0
 	if (OutputsWritten & (1 << VERT_RESULT_BFC0))
-		ret |= R300_VAP_OUTPUT_VTX_FMT_0__COLOR_2_PRESENT;
+		ret |= (7 << 2);
 
 	if (OutputsWritten & (1 << VERT_RESULT_BFC1))
 		ret |= R300_VAP_OUTPUT_VTX_FMT_0__COLOR_3_PRESENT;
 
+#if 0
 	if (OutputsWritten & (1 << VERT_RESULT_FOGC)) ;
 #endif
 

src/mesa/drivers/dri/r300/r300_vertprog.c

@@ -438,32 +438,42 @@ static void r300TranslateVertexShader(struct r300_vertex_program *vp,
 	assert(vp->key.OutputsWritten & (1 << VERT_RESULT_HPOS));
 
 	/* Assign outputs */
-	if (vp->key.OutputsWritten & (1 << VERT_RESULT_HPOS))
-		vp->outputs[VERT_RESULT_HPOS] = cur_reg++;
+	if (vp->key.OutputsWritten & (1 << VERT_RESULT_HPOS)) {
+		vp->outputs[VERT_RESULT_HPOS] = cur_reg;
+		cur_reg = 1;
+	}
 
-	if (vp->key.OutputsWritten & (1 << VERT_RESULT_PSIZ))
-		vp->outputs[VERT_RESULT_PSIZ] = cur_reg++;
+	if (vp->key.OutputsWritten & (1 << VERT_RESULT_COL0)) {
+		vp->outputs[VERT_RESULT_COL0] = 1;
+		cur_reg = 2;
+	}
 
-	if (vp->key.OutputsWritten & (1 << VERT_RESULT_COL0))
-		vp->outputs[VERT_RESULT_COL0] = cur_reg++;
+	if (vp->key.OutputsWritten & (1 << VERT_RESULT_COL1)) {
+		vp->outputs[VERT_RESULT_COL1] = 2;
+		cur_reg = 3;
+	}
 
-	if (vp->key.OutputsWritten & (1 << VERT_RESULT_COL1))
-		vp->outputs[VERT_RESULT_COL1] = cur_reg++;
+	if (vp->key.OutputsWritten & (1 << VERT_RESULT_BFC0)) {
+		vp->outputs[VERT_RESULT_BFC0] = 3;
+		cur_reg = 5;
+	}
 
+	if (vp->key.OutputsWritten & (1 << VERT_RESULT_BFC1)) {
+		vp->outputs[VERT_RESULT_BFC1] = 4;
+		cur_reg = 5;
+	}
 #if 0				/* Not supported yet */
-	if (vp->key.OutputsWritten & (1 << VERT_RESULT_BFC0))
-		vp->outputs[VERT_RESULT_BFC0] = cur_reg++;
-
-	if (vp->key.OutputsWritten & (1 << VERT_RESULT_BFC1))
-		vp->outputs[VERT_RESULT_BFC1] = cur_reg++;
-
 	if (vp->key.OutputsWritten & (1 << VERT_RESULT_FOGC))
 		vp->outputs[VERT_RESULT_FOGC] = cur_reg++;
 #endif
 
+	if (vp->key.OutputsWritten & (1 << VERT_RESULT_PSIZ))
+		vp->outputs[VERT_RESULT_PSIZ] = cur_reg++;
+
 	for (i = VERT_RESULT_TEX0; i <= VERT_RESULT_TEX7; i++)
-		if (vp->key.OutputsWritten & (1 << i))
+		if (vp->key.OutputsWritten & (1 << i)) {
 			vp->outputs[i] = cur_reg++;
+		}
 
 	vp->translated = GL_TRUE;
 	vp->native = GL_TRUE;
@@ -1255,8 +1265,6 @@ void r300SelectVertexShader(r300ContextPtr r300)
 	vpc = (struct r300_vertex_program_cont *)ctx->VertexProgram._Current;
 	InputsRead = ctx->FragmentProgram._Current->Base.InputsRead;
 
-	wanted_key.OutputsWritten |= 1 << VERT_RESULT_HPOS;
-
 	wpos_idx = -1;
 	if (InputsRead & FRAG_BIT_WPOS) {
 		for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
@@ -1271,20 +1279,8 @@ void r300SelectVertexShader(r300ContextPtr r300)
 		InputsRead |= (FRAG_BIT_TEX0 << i);
 		wpos_idx = i;
 	}
-
-	if (InputsRead & FRAG_BIT_COL0)
-		wanted_key.OutputsWritten |= 1 << VERT_RESULT_COL0;
-
-	if ((InputsRead & FRAG_BIT_COL1)	/*||
-						   (InputsRead & FRAG_BIT_FOGC) */ )
-		wanted_key.OutputsWritten |= 1 << VERT_RESULT_COL1;
-
-	for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
-		if (InputsRead & (FRAG_BIT_TEX0 << i))
-			wanted_key.OutputsWritten |=
-			    1 << (VERT_RESULT_TEX0 + i);
-
 	wanted_key.InputsRead = vpc->mesa_program.Base.InputsRead;
+	wanted_key.OutputsWritten = vpc->mesa_program.Base.OutputsWritten;
 	if (vpc->mesa_program.IsPositionInvariant) {
 		/* we wan't position don't we ? */
 		wanted_key.InputsRead |= (1 << VERT_ATTRIB_POS);