/**
* Delete a program and remove it from the hash table, ignoring the
* reference count.
* Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation)
* by a device driver function.
*/
void
_mesa_delete_program(GLcontext *ctx, struct gl_program *prog)
{
(void) ctx;
ASSERT(prog);
ASSERT(prog->RefCount==0);
if (prog == &_mesa_DummyProgram)
return;
if (prog->String)
_mesa_free(prog->String);
_mesa_free_instructions(prog->Instructions, prog->NumInstructions);
if (prog->Parameters) {
_mesa_free_parameter_list(prog->Parameters);
}
if (prog->Varying) {
_mesa_free_parameter_list(prog->Varying);
}
if (prog->Attributes) {
_mesa_free_parameter_list(prog->Attributes);
}
/* XXX this is a little ugly */
if (prog->Target == GL_VERTEX_PROGRAM_ARB) {
struct gl_vertex_program *vprog = (struct gl_vertex_program *) prog;
if (vprog->TnlData)
_mesa_free(vprog->TnlData);
}
_mesa_free(prog);
}
/**
* Delete a program and remove it from the hash table, ignoring the
* reference count.
* Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation)
* by a device driver function.
*/
void
_mesa_delete_program(struct gl_context *ctx, struct gl_program *prog)
{
(void) ctx;
assert(prog);
assert(prog->RefCount==0);
if (prog == &_mesa_DummyProgram)
return;
free(prog->String);
free(prog->LocalParams);
if (prog->Instructions) {
_mesa_free_instructions(prog->Instructions, prog->NumInstructions);
}
if (prog->Parameters) {
_mesa_free_parameter_list(prog->Parameters);
}
if (prog->nir) {
ralloc_free(prog->nir);
}
mtx_destroy(&prog->Mutex);
free(prog);
}
/**
* Make the given fragment program into a "no-op" shader.
* Actually, just copy the incoming fragment color (or texcoord)
* to the output color.
* This is for debug/test purposes.
*/
void
_mesa_nop_fragment_program(struct gl_context *ctx, struct gl_fragment_program *prog)
{
struct prog_instruction *inst;
GLuint inputAttr;
inst = _mesa_alloc_instructions(2);
if (!inst) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "_mesa_nop_fragment_program");
return;
}
_mesa_init_instructions(inst, 2);
inst[0].Opcode = OPCODE_MOV;
inst[0].DstReg.File = PROGRAM_OUTPUT;
inst[0].DstReg.Index = FRAG_RESULT_COLOR;
inst[0].SrcReg[0].File = PROGRAM_INPUT;
if (prog->Base.InputsRead & VARYING_BIT_COL0)
inputAttr = VARYING_SLOT_COL0;
else
inputAttr = VARYING_SLOT_TEX0;
inst[0].SrcReg[0].Index = inputAttr;
inst[1].Opcode = OPCODE_END;
_mesa_free_instructions(prog->Base.Instructions,
prog->Base.NumInstructions);
prog->Base.Instructions = inst;
prog->Base.NumInstructions = 2;
prog->Base.InputsRead = BITFIELD64_BIT(inputAttr);
prog->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
}
/**
* Delete a program and remove it from the hash table, ignoring the
* reference count.
* Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation)
* by a device driver function.
*/
void
_mesa_delete_program(struct gl_context *ctx, struct gl_program *prog)
{
(void) ctx;
ASSERT(prog);
ASSERT(prog->RefCount==0);
if (prog == &_mesa_DummyProgram)
return;
if (prog->String)
free(prog->String);
_mesa_free_instructions(prog->Instructions, prog->NumInstructions);
if (prog->Parameters) {
_mesa_free_parameter_list(prog->Parameters);
}
if (prog->Varying) {
_mesa_free_parameter_list(prog->Varying);
}
if (prog->Attributes) {
_mesa_free_parameter_list(prog->Attributes);
}
free(prog);
}
static void emit_op3fn(struct tnl_program *p,
enum prog_opcode op,
struct ureg dest,
GLuint mask,
struct ureg src0,
struct ureg src1,
struct ureg src2,
const char *fn,
GLuint line)
{
GLuint nr;
struct prog_instruction *inst;
assert((GLint) p->program->Base.NumInstructions <= p->max_inst);
if (p->program->Base.NumInstructions == p->max_inst) {
/* need to extend the program's instruction array */
struct prog_instruction *newInst;
/* double the size */
p->max_inst *= 2;
newInst = _mesa_alloc_instructions(p->max_inst);
if (!newInst) {
_mesa_error(NULL, GL_OUT_OF_MEMORY, "vertex program build");
return;
}
_mesa_copy_instructions(newInst,
p->program->Base.Instructions,
p->program->Base.NumInstructions);
_mesa_free_instructions(p->program->Base.Instructions,
p->program->Base.NumInstructions);
p->program->Base.Instructions = newInst;
}
nr = p->program->Base.NumInstructions++;
inst = &p->program->Base.Instructions[nr];
inst->Opcode = (enum prog_opcode) op;
inst->Data = 0;
emit_arg( &inst->SrcReg[0], src0 );
emit_arg( &inst->SrcReg[1], src1 );
emit_arg( &inst->SrcReg[2], src2 );
emit_dst( &inst->DstReg, dest, mask );
debug_insn(inst, fn, line);
}
/**
* Insert 'count' NOP instructions at 'start' in the given program.
* Adjust branch targets accordingly.
*/
GLboolean
_mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count)
{
const GLuint origLen = prog->NumInstructions;
const GLuint newLen = origLen + count;
struct prog_instruction *newInst;
GLuint i;
/* adjust branches */
for (i = 0; i < prog->NumInstructions; i++) {
struct prog_instruction *inst = prog->Instructions + i;
if (inst->BranchTarget > 0) {
if ((GLuint)inst->BranchTarget >= start) {
inst->BranchTarget += count;
}
}
}
/* Alloc storage for new instructions */
newInst = _mesa_alloc_instructions(newLen);
if (!newInst) {
return GL_FALSE;
}
/* Copy 'start' instructions into new instruction buffer */
_mesa_copy_instructions(newInst, prog->Instructions, start);
/* init the new instructions */
_mesa_init_instructions(newInst + start, count);
/* Copy the remaining/tail instructions to new inst buffer */
_mesa_copy_instructions(newInst + start + count,
prog->Instructions + start,
origLen - start);
/* free old instructions */
_mesa_free_instructions(prog->Instructions, origLen);
/* install new instructions */
prog->Instructions = newInst;
prog->NumInstructions = newLen;
return GL_TRUE;
}
/**
* \sa _mesa_nop_fragment_program
* Replace the given vertex program with a "no-op" program that just
* transforms vertex position and emits color.
*/
void
_mesa_nop_vertex_program(struct gl_context *ctx, struct gl_vertex_program *prog)
{
struct prog_instruction *inst;
GLuint inputAttr;
/*
* Start with a simple vertex program that emits color.
*/
inst = _mesa_alloc_instructions(2);
if (!inst) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "_mesa_nop_vertex_program");
return;
}
_mesa_init_instructions(inst, 2);
inst[0].Opcode = OPCODE_MOV;
inst[0].DstReg.File = PROGRAM_OUTPUT;
inst[0].DstReg.Index = VARYING_SLOT_COL0;
inst[0].SrcReg[0].File = PROGRAM_INPUT;
if (prog->Base.InputsRead & VERT_BIT_COLOR0)
inputAttr = VERT_ATTRIB_COLOR0;
else
inputAttr = VERT_ATTRIB_TEX0;
inst[0].SrcReg[0].Index = inputAttr;
inst[1].Opcode = OPCODE_END;
_mesa_free_instructions(prog->Base.Instructions,
prog->Base.NumInstructions);
prog->Base.Instructions = inst;
prog->Base.NumInstructions = 2;
prog->Base.InputsRead = BITFIELD64_BIT(inputAttr);
prog->Base.OutputsWritten = BITFIELD64_BIT(VARYING_SLOT_COL0);
/*
* Now insert code to do standard modelview/projection transformation.
*/
_mesa_insert_mvp_code(ctx, prog);
}
/**
* This function inserts instructions for coordinate modelview * projection
* into a vertex program.
* May be used to implement the position_invariant option.
*/
static void
_mesa_insert_mvp_dp4_code(struct gl_context *ctx, struct gl_vertex_program *vprog)
{
struct prog_instruction *newInst;
const GLuint origLen = vprog->Base.NumInstructions;
const GLuint newLen = origLen + 4;
GLuint i;
/*
* Setup state references for the modelview/projection matrix.
* XXX we should check if these state vars are already declared.
*/
static const gl_state_index mvpState[4][STATE_LENGTH] = {
{ STATE_MVP_MATRIX, 0, 0, 0, 0 }, /* state.matrix.mvp.row[0] */
{ STATE_MVP_MATRIX, 0, 1, 1, 0 }, /* state.matrix.mvp.row[1] */
{ STATE_MVP_MATRIX, 0, 2, 2, 0 }, /* state.matrix.mvp.row[2] */
{ STATE_MVP_MATRIX, 0, 3, 3, 0 }, /* state.matrix.mvp.row[3] */
};
GLint mvpRef[4];
for (i = 0; i < 4; i++) {
mvpRef[i] = _mesa_add_state_reference(vprog->Base.Parameters,
mvpState[i]);
}
/* Alloc storage for new instructions */
newInst = _mesa_alloc_instructions(newLen);
if (!newInst) {
_mesa_error(ctx, GL_OUT_OF_MEMORY,
"glProgramString(inserting position_invariant code)");
return;
}
/*
* Generated instructions:
* newInst[0] = DP4 result.position.x, mvp.row[0], vertex.position;
* newInst[1] = DP4 result.position.y, mvp.row[1], vertex.position;
* newInst[2] = DP4 result.position.z, mvp.row[2], vertex.position;
* newInst[3] = DP4 result.position.w, mvp.row[3], vertex.position;
*/
_mesa_init_instructions(newInst, 4);
for (i = 0; i < 4; i++) {
newInst[i].Opcode = OPCODE_DP4;
newInst[i].DstReg.File = PROGRAM_OUTPUT;
newInst[i].DstReg.Index = VARYING_SLOT_POS;
newInst[i].DstReg.WriteMask = (WRITEMASK_X << i);
newInst[i].SrcReg[0].File = PROGRAM_STATE_VAR;
newInst[i].SrcReg[0].Index = mvpRef[i];
newInst[i].SrcReg[0].Swizzle = SWIZZLE_NOOP;
newInst[i].SrcReg[1].File = PROGRAM_INPUT;
newInst[i].SrcReg[1].Index = VERT_ATTRIB_POS;
newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP;
}
/* Append original instructions after new instructions */
_mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen);
/* free old instructions */
_mesa_free_instructions(vprog->Base.Instructions, origLen);
/* install new instructions */
vprog->Base.Instructions = newInst;
vprog->Base.NumInstructions = newLen;
vprog->Base.InputsRead |= VERT_BIT_POS;
vprog->Base.OutputsWritten |= BITFIELD64_BIT(VARYING_SLOT_POS);
}
/**
* Append instructions to implement fog
*
* The \c fragment.fogcoord input is used to compute the fog blend factor.
*
* \param ctx The GL context
* \param fprog Fragment program that fog instructions will be appended to.
* \param fog_mode Fog mode. One of \c GL_EXP, \c GL_EXP2, or \c GL_LINEAR.
* \param saturate True if writes to color outputs should be clamped to [0, 1]
*
* \note
* This function sets \c VARYING_BIT_FOGC in \c fprog->Base.InputsRead.
*
* \todo With a little work, this function could be adapted to add fog code
* to vertex programs too.
*/
void
_mesa_append_fog_code(struct gl_context *ctx,
struct gl_fragment_program *fprog, GLenum fog_mode,
GLboolean saturate)
{
static const gl_state_index fogPStateOpt[STATE_LENGTH]
= { STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0 };
static const gl_state_index fogColorState[STATE_LENGTH]
= { STATE_FOG_COLOR, 0, 0, 0, 0};
struct prog_instruction *newInst, *inst;
const GLuint origLen = fprog->Base.NumInstructions;
const GLuint newLen = origLen + 5;
GLuint i;
GLint fogPRefOpt, fogColorRef; /* state references */
GLuint colorTemp, fogFactorTemp; /* temporary registerss */
if (fog_mode == GL_NONE) {
_mesa_problem(ctx, "_mesa_append_fog_code() called for fragment program"
" with fog_mode == GL_NONE");
return;
}
if (!(fprog->Base.OutputsWritten & (1 << FRAG_RESULT_COLOR))) {
/* program doesn't output color, so nothing to do */
return;
}
/* Alloc storage for new instructions */
newInst = _mesa_alloc_instructions(newLen);
if (!newInst) {
_mesa_error(ctx, GL_OUT_OF_MEMORY,
"glProgramString(inserting fog_option code)");
return;
}
/* Copy orig instructions into new instruction buffer */
_mesa_copy_instructions(newInst, fprog->Base.Instructions, origLen);
/* PARAM fogParamsRefOpt = internal optimized fog params; */
fogPRefOpt
= _mesa_add_state_reference(fprog->Base.Parameters, fogPStateOpt);
/* PARAM fogColorRef = state.fog.color; */
fogColorRef
= _mesa_add_state_reference(fprog->Base.Parameters, fogColorState);
/* TEMP colorTemp; */
colorTemp = fprog->Base.NumTemporaries++;
/* TEMP fogFactorTemp; */
fogFactorTemp = fprog->Base.NumTemporaries++;
/* Scan program to find where result.color is written */
inst = newInst;
for (i = 0; i < fprog->Base.NumInstructions; i++) {
if (inst->Opcode == OPCODE_END)
break;
if (inst->DstReg.File == PROGRAM_OUTPUT &&
inst->DstReg.Index == FRAG_RESULT_COLOR) {
/* change the instruction to write to colorTemp w/ clamping */
inst->DstReg.File = PROGRAM_TEMPORARY;
inst->DstReg.Index = colorTemp;
inst->SaturateMode = saturate;
/* don't break (may be several writes to result.color) */
}
inst++;
}
assert(inst->Opcode == OPCODE_END); /* we'll overwrite this inst */
_mesa_init_instructions(inst, 5);
/* emit instructions to compute fog blending factor */
/* this is always clamped to [0, 1] regardless of fragment clamping */
if (fog_mode == GL_LINEAR) {
/* MAD fogFactorTemp.x, fragment.fogcoord.x, fogPRefOpt.x, fogPRefOpt.y; */
inst->Opcode = OPCODE_MAD;
inst->DstReg.File = PROGRAM_TEMPORARY;
inst->DstReg.Index = fogFactorTemp;
inst->DstReg.WriteMask = WRITEMASK_X;
inst->SrcReg[0].File = PROGRAM_INPUT;
inst->SrcReg[0].Index = VARYING_SLOT_FOGC;
inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
inst->SrcReg[1].File = PROGRAM_STATE_VAR;
inst->SrcReg[1].Index = fogPRefOpt;
inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;
inst->SrcReg[2].File = PROGRAM_STATE_VAR;
inst->SrcReg[2].Index = fogPRefOpt;
inst->SrcReg[2].Swizzle = SWIZZLE_YYYY;
inst->SaturateMode = SATURATE_ZERO_ONE;
inst++;
}
else {
ASSERT(fog_mode == GL_EXP || fog_mode == GL_EXP2);
/* fogPRefOpt.z = d/ln(2), fogPRefOpt.w = d/sqrt(ln(2) */
/* EXP: MUL fogFactorTemp.x, fogPRefOpt.z, fragment.fogcoord.x; */
/* EXP2: MUL fogFactorTemp.x, fogPRefOpt.w, fragment.fogcoord.x; */
inst->Opcode = OPCODE_MUL;
inst->DstReg.File = PROGRAM_TEMPORARY;
inst->DstReg.Index = fogFactorTemp;
inst->DstReg.WriteMask = WRITEMASK_X;
inst->SrcReg[0].File = PROGRAM_STATE_VAR;
inst->SrcReg[0].Index = fogPRefOpt;
inst->SrcReg[0].Swizzle
= (fog_mode == GL_EXP) ? SWIZZLE_ZZZZ : SWIZZLE_WWWW;
inst->SrcReg[1].File = PROGRAM_INPUT;
inst->SrcReg[1].Index = VARYING_SLOT_FOGC;
inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;
inst++;
if (fog_mode == GL_EXP2) {
/* MUL fogFactorTemp.x, fogFactorTemp.x, fogFactorTemp.x; */
inst->Opcode = OPCODE_MUL;
inst->DstReg.File = PROGRAM_TEMPORARY;
inst->DstReg.Index = fogFactorTemp;
inst->DstReg.WriteMask = WRITEMASK_X;
inst->SrcReg[0].File = PROGRAM_TEMPORARY;
inst->SrcReg[0].Index = fogFactorTemp;
inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
inst->SrcReg[1].File = PROGRAM_TEMPORARY;
inst->SrcReg[1].Index = fogFactorTemp;
inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;
inst++;
}
/* EX2_SAT fogFactorTemp.x, -fogFactorTemp.x; */
inst->Opcode = OPCODE_EX2;
inst->DstReg.File = PROGRAM_TEMPORARY;
inst->DstReg.Index = fogFactorTemp;
inst->DstReg.WriteMask = WRITEMASK_X;
inst->SrcReg[0].File = PROGRAM_TEMPORARY;
inst->SrcReg[0].Index = fogFactorTemp;
inst->SrcReg[0].Negate = NEGATE_XYZW;
inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
inst->SaturateMode = SATURATE_ZERO_ONE;
inst++;
}
/* LRP result.color.xyz, fogFactorTemp.xxxx, colorTemp, fogColorRef; */
inst->Opcode = OPCODE_LRP;
inst->DstReg.File = PROGRAM_OUTPUT;
inst->DstReg.Index = FRAG_RESULT_COLOR;
inst->DstReg.WriteMask = WRITEMASK_XYZ;
inst->SrcReg[0].File = PROGRAM_TEMPORARY;
inst->SrcReg[0].Index = fogFactorTemp;
inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
inst->SrcReg[1].File = PROGRAM_TEMPORARY;
inst->SrcReg[1].Index = colorTemp;
inst->SrcReg[1].Swizzle = SWIZZLE_NOOP;
inst->SrcReg[2].File = PROGRAM_STATE_VAR;
inst->SrcReg[2].Index = fogColorRef;
inst->SrcReg[2].Swizzle = SWIZZLE_NOOP;
inst++;
/* MOV result.color.w, colorTemp.x; # copy alpha */
inst->Opcode = OPCODE_MOV;
inst->DstReg.File = PROGRAM_OUTPUT;
inst->DstReg.Index = FRAG_RESULT_COLOR;
inst->DstReg.WriteMask = WRITEMASK_W;
inst->SrcReg[0].File = PROGRAM_TEMPORARY;
inst->SrcReg[0].Index = colorTemp;
inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;
inst++;
/* END; */
inst->Opcode = OPCODE_END;
inst++;
/* free old instructions */
_mesa_free_instructions(fprog->Base.Instructions, origLen);
/* install new instructions */
fprog->Base.Instructions = newInst;
fprog->Base.NumInstructions = inst - newInst;
fprog->Base.InputsRead |= VARYING_BIT_FOGC;
assert(fprog->Base.OutputsWritten & (1 << FRAG_RESULT_COLOR));
}
static void
_mesa_insert_mvp_mad_code(struct gl_context *ctx, struct gl_vertex_program *vprog)
{
struct prog_instruction *newInst;
const GLuint origLen = vprog->Base.NumInstructions;
const GLuint newLen = origLen + 4;
GLuint hposTemp;
GLuint i;
/*
* Setup state references for the modelview/projection matrix.
* XXX we should check if these state vars are already declared.
*/
static const gl_state_index mvpState[4][STATE_LENGTH] = {
{ STATE_MVP_MATRIX, 0, 0, 0, STATE_MATRIX_TRANSPOSE },
{ STATE_MVP_MATRIX, 0, 1, 1, STATE_MATRIX_TRANSPOSE },
{ STATE_MVP_MATRIX, 0, 2, 2, STATE_MATRIX_TRANSPOSE },
{ STATE_MVP_MATRIX, 0, 3, 3, STATE_MATRIX_TRANSPOSE },
};
GLint mvpRef[4];
for (i = 0; i < 4; i++) {
mvpRef[i] = _mesa_add_state_reference(vprog->Base.Parameters,
mvpState[i]);
}
/* Alloc storage for new instructions */
newInst = _mesa_alloc_instructions(newLen);
if (!newInst) {
_mesa_error(ctx, GL_OUT_OF_MEMORY,
"glProgramString(inserting position_invariant code)");
return;
}
/* TEMP hposTemp; */
hposTemp = vprog->Base.NumTemporaries++;
/*
* Generated instructions:
* emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]);
* emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp);
* emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp);
* emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp);
*/
_mesa_init_instructions(newInst, 4);
newInst[0].Opcode = OPCODE_MUL;
newInst[0].DstReg.File = PROGRAM_TEMPORARY;
newInst[0].DstReg.Index = hposTemp;
newInst[0].DstReg.WriteMask = WRITEMASK_XYZW;
newInst[0].SrcReg[0].File = PROGRAM_INPUT;
newInst[0].SrcReg[0].Index = VERT_ATTRIB_POS;
newInst[0].SrcReg[0].Swizzle = SWIZZLE_XXXX;
newInst[0].SrcReg[1].File = PROGRAM_STATE_VAR;
newInst[0].SrcReg[1].Index = mvpRef[0];
newInst[0].SrcReg[1].Swizzle = SWIZZLE_NOOP;
for (i = 1; i <= 2; i++) {
newInst[i].Opcode = OPCODE_MAD;
newInst[i].DstReg.File = PROGRAM_TEMPORARY;
newInst[i].DstReg.Index = hposTemp;
newInst[i].DstReg.WriteMask = WRITEMASK_XYZW;
newInst[i].SrcReg[0].File = PROGRAM_INPUT;
newInst[i].SrcReg[0].Index = VERT_ATTRIB_POS;
newInst[i].SrcReg[0].Swizzle = MAKE_SWIZZLE4(i,i,i,i);
newInst[i].SrcReg[1].File = PROGRAM_STATE_VAR;
newInst[i].SrcReg[1].Index = mvpRef[i];
newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP;
newInst[i].SrcReg[2].File = PROGRAM_TEMPORARY;
newInst[i].SrcReg[2].Index = hposTemp;
newInst[1].SrcReg[2].Swizzle = SWIZZLE_NOOP;
}
newInst[3].Opcode = OPCODE_MAD;
newInst[3].DstReg.File = PROGRAM_OUTPUT;
newInst[3].DstReg.Index = VARYING_SLOT_POS;
newInst[3].DstReg.WriteMask = WRITEMASK_XYZW;
newInst[3].SrcReg[0].File = PROGRAM_INPUT;
newInst[3].SrcReg[0].Index = VERT_ATTRIB_POS;
newInst[3].SrcReg[0].Swizzle = SWIZZLE_WWWW;
newInst[3].SrcReg[1].File = PROGRAM_STATE_VAR;
newInst[3].SrcReg[1].Index = mvpRef[3];
newInst[3].SrcReg[1].Swizzle = SWIZZLE_NOOP;
newInst[3].SrcReg[2].File = PROGRAM_TEMPORARY;
newInst[3].SrcReg[2].Index = hposTemp;
newInst[3].SrcReg[2].Swizzle = SWIZZLE_NOOP;
/* Append original instructions after new instructions */
_mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen);
/* free old instructions */
_mesa_free_instructions(vprog->Base.Instructions, origLen);
/* install new instructions */
vprog->Base.Instructions = newInst;
vprog->Base.NumInstructions = newLen;
vprog->Base.InputsRead |= VERT_BIT_POS;
vprog->Base.OutputsWritten |= BITFIELD64_BIT(VARYING_SLOT_POS);
}
