r300: always assume all components are read by fragment program

Components of input attributes that are used by fragment program aren't part of vertex program key, and that may lead to situations when vertex program writes only TEX1.xy and fragment program reads TEX1.xyz, resulting in rendering errors.

Reported-by: Nicolai Hähnle <nhaehnle@gmail.com>

diff --git a/src/mesa/drivers/dri/r300/r300_vertprog.c b/src/mesa/drivers/dri/r300/r300_vertprog.c
index c0b1161..de32013 100644 (file)
--- a/src/mesa/drivers/dri/r300/r300_vertprog.c
+++ b/src/mesa/drivers/dri/r300/r300_vertprog.c
@@ -1494,46 +1494,6 @@ static void addArtificialOutputs(GLcontext *ctx, struct gl_program *prog)
 
 #undef ADD_OUTPUT
 
-static GLuint getUsedComponents(const GLuint swizzle)
-{
-       GLuint ret;
-
-       ret = 0;
-
-       /* need to mask out ZERO, ONE and NIL swizzles */
-       if (GET_SWZ(swizzle, SWIZZLE_X) <= SWIZZLE_W)
-               ret |= 1 << (GET_SWZ(swizzle, SWIZZLE_X));
-       if (GET_SWZ(swizzle, SWIZZLE_Y) <= SWIZZLE_W)
-               ret |= 1 << (GET_SWZ(swizzle, SWIZZLE_Y));
-       if (GET_SWZ(swizzle, SWIZZLE_Z) <= SWIZZLE_W)
-               ret |= 1 << (GET_SWZ(swizzle, SWIZZLE_Z));
-       if (GET_SWZ(swizzle, SWIZZLE_W) <= SWIZZLE_W)
-               ret |= 1 << (GET_SWZ(swizzle, SWIZZLE_W));
-
-       return ret;
-}
-
-static GLuint trackUsedComponents(const struct gl_program *prog, const GLuint attrib)
-{
-       struct prog_instruction *inst;
-       int tmp, i;
-       GLuint ret;
-
-       inst = prog->Instructions;
-       ret = 0;
-       while (inst->Opcode != OPCODE_END) {
-               tmp = _mesa_num_inst_src_regs(inst->Opcode);
-               for (i = 0; i < tmp; ++i) {
-                       if (inst->SrcReg[i].File == PROGRAM_INPUT && inst->SrcReg[i].Index == attrib) {
-                               ret |= getUsedComponents(inst->SrcReg[i].Swizzle);
-                       }
-               }
-               ++inst;
-       }
-
-       return ret;
-}
-
 static void nqssadceInit(struct nqssadce_state* s)
 {
        r300ContextPtr r300 = R300_CONTEXT(s->Ctx);
@@ -1541,18 +1501,14 @@ static void nqssadceInit(struct nqssadce_state* s)
 
        fp_reads = r300->selected_fp->Base->InputsRead;
        {
-               GLuint tmp;
-
                if (fp_reads & FRAG_BIT_COL0) {
-                               tmp = trackUsedComponents(r300->selected_fp->Base, FRAG_ATTRIB_COL0);
-                               s->Outputs[VERT_RESULT_COL0].Sourced = tmp;
-                               s->Outputs[VERT_RESULT_BFC0].Sourced = tmp;
+                               s->Outputs[VERT_RESULT_COL0].Sourced = WRITEMASK_XYZW;
+                               s->Outputs[VERT_RESULT_BFC0].Sourced = WRITEMASK_XYZW;
                }
 
                if (fp_reads & FRAG_BIT_COL1) {
-                               tmp = trackUsedComponents(r300->selected_fp->Base, FRAG_ATTRIB_COL1);
-                               s->Outputs[VERT_RESULT_COL1].Sourced = tmp;
-                               s->Outputs[VERT_RESULT_BFC1].Sourced = tmp;
+                               s->Outputs[VERT_RESULT_COL1].Sourced = WRITEMASK_XYZW;
+                               s->Outputs[VERT_RESULT_BFC1].Sourced = WRITEMASK_XYZW;
                }
        }
 
@@ -1560,7 +1516,7 @@ static void nqssadceInit(struct nqssadce_state* s)
                int i;
                for (i = 0; i < 8; ++i) {
                        if (fp_reads & FRAG_BIT_TEX(i)) {
-                               s->Outputs[VERT_RESULT_TEX0 + i].Sourced = trackUsedComponents(r300->selected_fp->Base, FRAG_ATTRIB_TEX0 + i);
+                               s->Outputs[VERT_RESULT_TEX0 + i].Sourced = WRITEMASK_XYZW;
                        }
                }
        }