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-rw-r--r--src/mesa/drivers/dri/r600/r700_fragprog.c67
-rw-r--r--src/mesa/drivers/dri/r600/r700_fragprog.h2
2 files changed, 68 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/r600/r700_fragprog.c b/src/mesa/drivers/dri/r600/r700_fragprog.c
index 3352e41ef3..bc2c5d53ce 100644
--- a/src/mesa/drivers/dri/r600/r700_fragprog.c
+++ b/src/mesa/drivers/dri/r600/r700_fragprog.c
@@ -42,6 +42,65 @@
#include "r700_debug.h"
+void insert_wpos_code(GLcontext *ctx, struct gl_fragment_program *fprog)
+{
+ static const gl_state_index winstate[STATE_LENGTH]
+ = { STATE_INTERNAL, STATE_FB_SIZE, 0, 0, 0};
+ struct prog_instruction *newInst, *inst;
+ const GLuint origLen = fprog->Base.NumInstructions;
+ const GLuint newLen = origLen + 1;
+ GLint win_size; /* state reference */
+ GLuint wpos_temp; /* temp register */
+ int i, j;
+
+ /* PARAM win_size = STATE_FB_SIZE */
+ win_size = _mesa_add_state_reference(fprog->Base.Parameters, winstate);
+
+ wpos_temp = fprog->Base.NumTemporaries++;
+
+ /* Alloc storage for new instructions */
+ newInst = _mesa_alloc_instructions(newLen);
+
+ _mesa_init_instructions(newInst,1);
+
+ /* invert wpos.y
+ * wpos_temp.xyzw = wpos.x-yzw + winsize.0y00 */
+ newInst[0].Opcode = OPCODE_ADD;
+ newInst[0].DstReg.File = PROGRAM_TEMPORARY;
+ newInst[0].DstReg.Index = wpos_temp;
+ newInst[0].DstReg.WriteMask = WRITEMASK_XYZW;
+
+ newInst[0].SrcReg[0].File = PROGRAM_INPUT;
+ newInst[0].SrcReg[0].Index = FRAG_ATTRIB_WPOS;
+ newInst[0].SrcReg[0].Swizzle = SWIZZLE_XYZW;
+ newInst[0].SrcReg[0].Negate = NEGATE_Y;
+
+ newInst[0].SrcReg[1].File = PROGRAM_STATE_VAR;
+ newInst[0].SrcReg[1].Index = win_size;
+ newInst[0].SrcReg[1].Swizzle = MAKE_SWIZZLE4(SWIZZLE_ZERO, SWIZZLE_Y, SWIZZLE_ZERO, SWIZZLE_ZERO);
+
+ /* scan program where WPOS is used and replace with wpos_temp */
+ inst = fprog->Base.Instructions;
+ for (i = 0; i < fprog->Base.NumInstructions; i++) {
+ for (j=0; j < 3; j++) {
+ if(inst->SrcReg[j].File == PROGRAM_INPUT &&
+ inst->SrcReg[j].Index == FRAG_ATTRIB_WPOS) {
+ inst->SrcReg[j].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[j].Index = wpos_temp;
+ }
+ }
+ inst++;
+ }
+ /* Append original instructions after new instructions */
+ _mesa_copy_instructions (newInst + 1, fprog->Base.Instructions, origLen);
+ /* free old instructions */
+ _mesa_free_instructions(fprog->Base.Instructions, origLen);
+ /* install new instructions */
+ fprog->Base.Instructions = newInst;
+ fprog->Base.NumInstructions = newLen;
+
+}
+
//TODO : Validate FP input with VP output.
void Map_Fragment_Program(r700_AssemblerBase *pAsm,
struct gl_fragment_program *mesa_fp,
@@ -318,7 +377,13 @@ GLboolean r700TranslateFragmentShader(struct r700_fragment_program *fp,
//Init_Program
Init_r700_AssemblerBase( SPT_FP, &(fp->r700AsmCode), &(fp->r700Shader) );
- Map_Fragment_Program(&(fp->r700AsmCode), mesa_fp, ctx);
+
+ if(mesa_fp->Base.InputsRead & FRAG_BIT_WPOS)
+ {
+ insert_wpos_code(ctx, mesa_fp);
+ }
+
+ Map_Fragment_Program(&(fp->r700AsmCode), mesa_fp, ctx);
if( GL_FALSE == Find_Instruction_Dependencies_fp(fp, mesa_fp) )
{
diff --git a/src/mesa/drivers/dri/r600/r700_fragprog.h b/src/mesa/drivers/dri/r600/r700_fragprog.h
index e562bfa478..39c59c9201 100644
--- a/src/mesa/drivers/dri/r600/r700_fragprog.h
+++ b/src/mesa/drivers/dri/r600/r700_fragprog.h
@@ -48,6 +48,8 @@ struct r700_fragment_program
};
/* Internal */
+void insert_wpos_code(GLcontext *ctx, struct gl_fragment_program *fprog);
+
void Map_Fragment_Program(r700_AssemblerBase *pAsm,
struct gl_fragment_program *mesa_fp,
GLcontext *ctx);