static GLboolean run_lighting( GLcontext *ctx,
struct tnl_pipeline_stage *stage )
{
struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &tnl->vb;
GLvector4f *input = ctx->_NeedEyeCoords ? VB->EyePtr : VB->ObjPtr;
GLuint idx;
if (!ctx->Light.Enabled || ctx->VertexProgram._Current)
return GL_TRUE;
/* Make sure we can talk about position x,y and z:
*/
if (input->size <= 2 && input == VB->ObjPtr) {
_math_trans_4f( store->Input.data,
VB->ObjPtr->data,
VB->ObjPtr->stride,
GL_FLOAT,
VB->ObjPtr->size,
0,
VB->Count );
if (input->size <= 2) {
/* Clean z.
*/
_mesa_vector4f_clean_elem(&store->Input, VB->Count, 2);
}
if (input->size <= 1) {
/* Clean y.
*/
_mesa_vector4f_clean_elem(&store->Input, VB->Count, 1);
}
input = &store->Input;
}
idx = 0;
if (prepare_materials( ctx, VB, store ))
idx |= LIGHT_MATERIAL;
if (ctx->Light.Model.TwoSide)
idx |= LIGHT_TWOSIDE;
/* The individual functions know about replaying side-effects
* vs. full re-execution.
*/
store->light_func_tab[idx]( ctx, VB, stage, input );
VB->AttribPtr[_TNL_ATTRIB_COLOR0] = VB->ColorPtr[0];
VB->AttribPtr[_TNL_ATTRIB_COLOR1] = VB->SecondaryColorPtr[0];
VB->AttribPtr[_TNL_ATTRIB_COLOR_INDEX] = VB->IndexPtr[0];
return GL_TRUE;
}
static GLboolean run_vertex_stage( struct gl_context *ctx,
struct tnl_pipeline_stage *stage )
{
struct vertex_stage_data *store = (struct vertex_stage_data *)stage->privatePtr;
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &tnl->vb;
if (ctx->VertexProgram._Current)
return GL_TRUE;
tnl_clip_prepare(ctx);
if (ctx->_NeedEyeCoords) {
/* Separate modelview transformation:
* Use combined ModelProject to avoid some depth artifacts
*/
if (ctx->ModelviewMatrixStack.Top->type == MATRIX_IDENTITY)
VB->EyePtr = VB->AttribPtr[_TNL_ATTRIB_POS];
else
VB->EyePtr = TransformRaw( &store->eye,
ctx->ModelviewMatrixStack.Top,
VB->AttribPtr[_TNL_ATTRIB_POS]);
}
VB->ClipPtr = TransformRaw( &store->clip,
&ctx->_ModelProjectMatrix,
VB->AttribPtr[_TNL_ATTRIB_POS] );
/* Drivers expect this to be clean to element 4...
*/
switch (VB->ClipPtr->size) {
case 1:
/* impossible */
case 2:
_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
/* fall-through */
case 3:
_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
/* fall-through */
case 4:
break;
}
/* Cliptest and perspective divide. Clip functions must clear
* the clipmask.
*/
store->ormask = 0;
store->andmask = CLIP_FRUSTUM_BITS;
if (tnl->NeedNdcCoords) {
VB->NdcPtr =
_mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
&store->proj,
store->clipmask,
&store->ormask,
&store->andmask,
!ctx->Transform.DepthClamp );
}
else {
VB->NdcPtr = NULL;
_mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
NULL,
store->clipmask,
&store->ormask,
&store->andmask,
!ctx->Transform.DepthClamp );
}
if (store->andmask)
return GL_FALSE;
/* Test userclip planes. This contributes to VB->ClipMask, so
* is essentially required to be in this stage.
*/
if (ctx->Transform.ClipPlanesEnabled) {
usercliptab[VB->ClipPtr->size]( ctx,
VB->ClipPtr,
store->clipmask,
&store->ormask,
&store->andmask );
if (store->andmask)
return GL_FALSE;
}
VB->ClipAndMask = store->andmask;
VB->ClipOrMask = store->ormask;
VB->ClipMask = store->clipmask;
return GL_TRUE;
}
static GLboolean
run_fog_stage(struct gl_context *ctx, struct tnl_pipeline_stage *stage)
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &tnl->vb;
struct fog_stage_data *store = FOG_STAGE_DATA(stage);
GLvector4f *input;
if (!ctx->Fog.Enabled)
return GL_TRUE;
if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT && !ctx->VertexProgram._Current) {
GLuint i;
GLfloat *coord;
/* Fog is computed from vertex or fragment Z values */
/* source = VB->AttribPtr[_TNL_ATTRIB_POS] or VB->EyePtr coords */
/* dest = VB->AttribPtr[_TNL_ATTRIB_FOG] = fog stage private storage */
VB->AttribPtr[_TNL_ATTRIB_FOG] = &store->fogcoord;
if (!ctx->_NeedEyeCoords) {
/* compute fog coords from object coords */
const GLfloat *m = ctx->ModelviewMatrixStack.Top->m;
GLfloat plane[4];
/* Use this to store calculated eye z values:
*/
input = &store->fogcoord;
plane[0] = m[2];
plane[1] = m[6];
plane[2] = m[10];
plane[3] = m[14];
/* Full eye coords weren't required, just calculate the
* eye Z values.
*/
_mesa_dotprod_tab[VB->AttribPtr[_TNL_ATTRIB_POS]->size]
( (GLfloat *) input->data,
4 * sizeof(GLfloat),
VB->AttribPtr[_TNL_ATTRIB_POS], plane );
input->count = VB->AttribPtr[_TNL_ATTRIB_POS]->count;
/* make sure coords are really positive
NOTE should avoid going through array twice */
coord = input->start;
for (i = 0; i < input->count; i++) {
*coord = fabsf(*coord);
STRIDE_F(coord, input->stride);
}
}
else {
/* fog coordinates = eye Z coordinates - need to copy for ABS */
input = &store->fogcoord;
if (VB->EyePtr->size < 2)
_mesa_vector4f_clean_elem( VB->EyePtr, VB->Count, 2 );
input->stride = 4 * sizeof(GLfloat);
input->count = VB->EyePtr->count;
coord = VB->EyePtr->start;
for (i = 0 ; i < VB->EyePtr->count; i++) {
input->data[i][0] = fabsf(coord[2]);
STRIDE_F(coord, VB->EyePtr->stride);
}
}
}
else {
/* use glFogCoord() coordinates */
input = VB->AttribPtr[_TNL_ATTRIB_FOG]; /* source data */
/* input->count may be one if glFogCoord was only called once
* before glBegin. But we need to compute fog for all vertices.
*/
input->count = VB->AttribPtr[_TNL_ATTRIB_POS]->count;
VB->AttribPtr[_TNL_ATTRIB_FOG] = &store->fogcoord; /* dest data */
}
if (tnl->_DoVertexFog) {
/* compute blend factors from fog coordinates */
compute_fog_blend_factors( ctx, VB->AttribPtr[_TNL_ATTRIB_FOG], input );
}
else {
/* results = incoming fog coords (compute fog per-fragment later) */
VB->AttribPtr[_TNL_ATTRIB_FOG] = input;
}
return GL_TRUE;
}
static GLboolean run_fog_stage( GLcontext *ctx,
struct gl_pipeline_stage *stage )
{
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
struct fog_stage_data *store = FOG_STAGE_DATA(stage);
GLvector1f *input;
if (stage->changed_inputs == 0)
return GL_TRUE;
if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT) {
/* fog computed from Z depth */
/* source = VB->ObjPtr or VB->EyePtr coords */
/* dest = VB->FogCoordPtr = fog stage private storage */
VB->FogCoordPtr = &store->fogcoord;
if (!ctx->_NeedEyeCoords) {
GLfloat *m = ctx->ModelView.m;
GLfloat plane[4];
/* Use this to store calculated eye z values:
*/
input = &store->fogcoord;
plane[0] = m[2];
plane[1] = m[6];
plane[2] = m[10];
plane[3] = m[14];
/* Full eye coords weren't required, just calculate the
* eye Z values.
*/
_mesa_dotprod_tab[VB->ObjPtr->size]( input->data,
sizeof(GLfloat),
VB->ObjPtr, plane );
input->count = VB->ObjPtr->count;
}
else
{
input = &store->input;
if (VB->EyePtr->size < 2)
_mesa_vector4f_clean_elem( VB->EyePtr, VB->Count, 2 );
input->data = &(VB->EyePtr->data[0][2]);
input->start = VB->EyePtr->start+2;
input->stride = VB->EyePtr->stride;
input->count = VB->EyePtr->count;
}
} else {
/* use glFogCoord() coordinates */
/* source = VB->FogCoordPtr */
input = VB->FogCoordPtr;
/* dest = fog stage private storage */
VB->FogCoordPtr = &store->fogcoord;
}
make_win_fog_coords( ctx, VB->FogCoordPtr, input );
return GL_TRUE;
}
/**
* This function executes vertex programs
*/
static GLboolean
run_vp( struct gl_context *ctx, struct tnl_pipeline_stage *stage )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vp_stage_data *store = VP_STAGE_DATA(stage);
struct vertex_buffer *VB = &tnl->vb;
struct gl_vertex_program *program = ctx->VertexProgram._Current;
struct gl_program_machine *machine = &store->machine;
GLuint outputs[VARYING_SLOT_MAX], numOutputs;
GLuint i, j;
if (!program)
return GL_TRUE;
/* ARB program or vertex shader */
_mesa_load_state_parameters(ctx, program->Base.Parameters);
/* make list of outputs to save some time below */
numOutputs = 0;
for (i = 0; i < VARYING_SLOT_MAX; i++) {
if (program->Base.OutputsWritten & BITFIELD64_BIT(i)) {
outputs[numOutputs++] = i;
}
}
/* Allocate result vectors. We delay this until now to avoid allocating
* memory that would never be used if we don't run the software tnl pipeline.
*/
if (!store->results[0].storage) {
for (i = 0; i < VARYING_SLOT_MAX; i++) {
assert(!store->results[i].storage);
_mesa_vector4f_alloc( &store->results[i], 0, VB->Size, 32 );
store->results[i].size = 4;
}
}
map_textures(ctx, program);
for (i = 0; i < VB->Count; i++) {
GLuint attr;
init_machine(ctx, machine, tnl->CurInstance);
#if 0
printf("Input %d: %f, %f, %f, %f\n", i,
VB->AttribPtr[0]->data[i][0],
VB->AttribPtr[0]->data[i][1],
VB->AttribPtr[0]->data[i][2],
VB->AttribPtr[0]->data[i][3]);
printf(" color: %f, %f, %f, %f\n",
VB->AttribPtr[3]->data[i][0],
VB->AttribPtr[3]->data[i][1],
VB->AttribPtr[3]->data[i][2],
VB->AttribPtr[3]->data[i][3]);
printf(" normal: %f, %f, %f, %f\n",
VB->AttribPtr[2]->data[i][0],
VB->AttribPtr[2]->data[i][1],
VB->AttribPtr[2]->data[i][2],
VB->AttribPtr[2]->data[i][3]);
#endif
/* the vertex array case */
for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
if (program->Base.InputsRead & BITFIELD64_BIT(attr)) {
const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data;
const GLuint size = VB->AttribPtr[attr]->size;
const GLuint stride = VB->AttribPtr[attr]->stride;
const GLfloat *data = (GLfloat *) (ptr + stride * i);
#ifdef NAN_CHECK
check_float(data[0]);
check_float(data[1]);
check_float(data[2]);
check_float(data[3]);
#endif
COPY_CLEAN_4V(machine->VertAttribs[attr], size, data);
}
}
/* execute the program */
_mesa_execute_program(ctx, &program->Base, machine);
/* copy the output registers into the VB->attribs arrays */
for (j = 0; j < numOutputs; j++) {
const GLuint attr = outputs[j];
#ifdef NAN_CHECK
check_float(machine->Outputs[attr][0]);
check_float(machine->Outputs[attr][1]);
check_float(machine->Outputs[attr][2]);
check_float(machine->Outputs[attr][3]);
#endif
COPY_4V(store->results[attr].data[i], machine->Outputs[attr]);
}
/* FOGC is a special case. Fragment shader expects (f,0,0,1) */
if (program->Base.OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_FOGC)) {
store->results[VARYING_SLOT_FOGC].data[i][1] = 0.0;
store->results[VARYING_SLOT_FOGC].data[i][2] = 0.0;
store->results[VARYING_SLOT_FOGC].data[i][3] = 1.0;
}
#ifdef NAN_CHECK
ASSERT(machine->Outputs[0][3] != 0.0F);
#endif
#if 0
printf("HPOS: %f %f %f %f\n",
machine->Outputs[0][0],
machine->Outputs[0][1],
machine->Outputs[0][2],
machine->Outputs[0][3]);
#endif
}
unmap_textures(ctx, program);
if (program->IsPositionInvariant) {
/* We need the exact same transform as in the fixed function path here
* to guarantee invariance, depending on compiler optimization flags
* results could be different otherwise.
*/
VB->ClipPtr = TransformRaw( &store->results[0],
&ctx->_ModelProjectMatrix,
VB->AttribPtr[0] );
/* Drivers expect this to be clean to element 4...
*/
switch (VB->ClipPtr->size) {
case 1:
/* impossible */
case 2:
_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
/* fall-through */
case 3:
_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
/* fall-through */
case 4:
break;
}
}
else {
/* Setup the VB pointers so that the next pipeline stages get
* their data from the right place (the program output arrays).
*/
VB->ClipPtr = &store->results[VARYING_SLOT_POS];
VB->ClipPtr->size = 4;
VB->ClipPtr->count = VB->Count;
}
VB->AttribPtr[VERT_ATTRIB_COLOR0] = &store->results[VARYING_SLOT_COL0];
VB->AttribPtr[VERT_ATTRIB_COLOR1] = &store->results[VARYING_SLOT_COL1];
VB->AttribPtr[VERT_ATTRIB_FOG] = &store->results[VARYING_SLOT_FOGC];
VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->results[VARYING_SLOT_PSIZ];
VB->BackfaceColorPtr = &store->results[VARYING_SLOT_BFC0];
VB->BackfaceSecondaryColorPtr = &store->results[VARYING_SLOT_BFC1];
for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]
= &store->results[VARYING_SLOT_TEX0 + i];
}
for (i = 0; i < ctx->Const.MaxVarying; i++) {
if (program->Base.OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
/* Note: varying results get put into the generic attributes */
VB->AttribPtr[VERT_ATTRIB_GENERIC0+i]
= &store->results[VARYING_SLOT_VAR0 + i];
}
}
/* Perform NDC and cliptest operations:
*/
return do_ndc_cliptest(ctx, store);
}
/**
* This function executes vertex programs
*/
static GLboolean
run_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vp_stage_data *store = VP_STAGE_DATA(stage);
struct vertex_buffer *VB = &tnl->vb;
struct gl_vertex_program *program = ctx->VertexProgram._Current;
struct gl_program_machine machine;
GLuint outputs[VERT_RESULT_MAX], numOutputs;
GLuint i, j;
if (!program)
return GL_TRUE;
if (program->IsNVProgram) {
_mesa_load_tracked_matrices(ctx);
}
else {
/* ARB program or vertex shader */
_mesa_load_state_parameters(ctx, program->Base.Parameters);
}
/* make list of outputs to save some time below */
numOutputs = 0;
for (i = 0; i < VERT_RESULT_MAX; i++) {
if (program->Base.OutputsWritten & (1 << i)) {
outputs[numOutputs++] = i;
}
}
map_textures(ctx, program);
for (i = 0; i < VB->Count; i++) {
GLuint attr;
init_machine(ctx, &machine);
#if 0
printf("Input %d: %f, %f, %f, %f\n", i,
VB->AttribPtr[0]->data[i][0],
VB->AttribPtr[0]->data[i][1],
VB->AttribPtr[0]->data[i][2],
VB->AttribPtr[0]->data[i][3]);
printf(" color: %f, %f, %f, %f\n",
VB->AttribPtr[3]->data[i][0],
VB->AttribPtr[3]->data[i][1],
VB->AttribPtr[3]->data[i][2],
VB->AttribPtr[3]->data[i][3]);
printf(" normal: %f, %f, %f, %f\n",
VB->AttribPtr[2]->data[i][0],
VB->AttribPtr[2]->data[i][1],
VB->AttribPtr[2]->data[i][2],
VB->AttribPtr[2]->data[i][3]);
#endif
/* the vertex array case */
for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
if (program->Base.InputsRead & (1 << attr)) {
const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data;
const GLuint size = VB->AttribPtr[attr]->size;
const GLuint stride = VB->AttribPtr[attr]->stride;
const GLfloat *data = (GLfloat *) (ptr + stride * i);
COPY_CLEAN_4V(machine.VertAttribs[attr], size, data);
}
}
/* execute the program */
_mesa_execute_program(ctx, &program->Base, &machine);
/* copy the output registers into the VB->attribs arrays */
for (j = 0; j < numOutputs; j++) {
const GLuint attr = outputs[j];
COPY_4V(store->results[attr].data[i], machine.Outputs[attr]);
}
#if 0
printf("HPOS: %f %f %f %f\n",
machine.Outputs[0][0],
machine.Outputs[0][1],
machine.Outputs[0][2],
machine.Outputs[0][3]);
#endif
}
unmap_textures(ctx, program);
/* Fixup fog and point size results if needed */
if (program->IsNVProgram) {
if (ctx->Fog.Enabled &&
(program->Base.OutputsWritten & (1 << VERT_RESULT_FOGC)) == 0) {
for (i = 0; i < VB->Count; i++) {
store->results[VERT_RESULT_FOGC].data[i][0] = 1.0;
}
}
if (ctx->VertexProgram.PointSizeEnabled &&
(program->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ)) == 0) {
for (i = 0; i < VB->Count; i++) {
store->results[VERT_RESULT_PSIZ].data[i][0] = ctx->Point.Size;
}
}
}
if (program->IsPositionInvariant) {
/* We need the exact same transform as in the fixed function path here
* to guarantee invariance, depending on compiler optimization flags
* results could be different otherwise.
*/
VB->ClipPtr = TransformRaw( &store->results[0],
&ctx->_ModelProjectMatrix,
VB->AttribPtr[0] );
/* Drivers expect this to be clean to element 4...
*/
switch (VB->ClipPtr->size) {
case 1:
/* impossible */
case 2:
_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
/* fall-through */
case 3:
_mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
/* fall-through */
case 4:
break;
}
}
else {
/* Setup the VB pointers so that the next pipeline stages get
* their data from the right place (the program output arrays).
*/
VB->ClipPtr = &store->results[VERT_RESULT_HPOS];
VB->ClipPtr->size = 4;
VB->ClipPtr->count = VB->Count;
}
VB->ColorPtr[0] = &store->results[VERT_RESULT_COL0];
VB->ColorPtr[1] = &store->results[VERT_RESULT_BFC0];
VB->SecondaryColorPtr[0] = &store->results[VERT_RESULT_COL1];
VB->SecondaryColorPtr[1] = &store->results[VERT_RESULT_BFC1];
VB->FogCoordPtr = &store->results[VERT_RESULT_FOGC];
VB->AttribPtr[VERT_ATTRIB_COLOR0] = &store->results[VERT_RESULT_COL0];
VB->AttribPtr[VERT_ATTRIB_COLOR1] = &store->results[VERT_RESULT_COL1];
VB->AttribPtr[VERT_ATTRIB_FOG] = &store->results[VERT_RESULT_FOGC];
VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->results[VERT_RESULT_PSIZ];
for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
VB->TexCoordPtr[i] =
VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]
= &store->results[VERT_RESULT_TEX0 + i];
}
for (i = 0; i < ctx->Const.MaxVarying; i++) {
if (program->Base.OutputsWritten & (1 << (VERT_RESULT_VAR0 + i))) {
/* Note: varying results get put into the generic attributes */
VB->AttribPtr[VERT_ATTRIB_GENERIC0+i]
= &store->results[VERT_RESULT_VAR0 + i];
}
}
/* Perform NDC and cliptest operations:
*/
return do_ndc_cliptest(ctx, store);
}
static GLboolean
run_fog_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &tnl->vb;
struct fog_stage_data *store = FOG_STAGE_DATA(stage);
GLvector4f *input;
if (ctx->ShaderObjects._VertexShaderPresent)
return GL_TRUE;
if (!ctx->Fog.Enabled || ctx->VertexProgram._Enabled)
return GL_TRUE;
if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT) {
/* Fog is computed from vertex or fragment Z values */
/* source = VB->ObjPtr or VB->EyePtr coords */
/* dest = VB->FogCoordPtr = fog stage private storage */
VB->FogCoordPtr = &store->fogcoord;
if (!ctx->_NeedEyeCoords) {
/* compute fog coords from object coords */
const GLfloat *m = ctx->ModelviewMatrixStack.Top->m;
GLfloat plane[4];
/* Use this to store calculated eye z values:
*/
input = &store->fogcoord;
/* NOTE: negate plane here so we get positive fog coords! */
plane[0] = -m[2];
plane[1] = -m[6];
plane[2] = -m[10];
plane[3] = -m[14];
/* Full eye coords weren't required, just calculate the
* eye Z values.
*/
_mesa_dotprod_tab[VB->ObjPtr->size]( (GLfloat *) input->data,
4 * sizeof(GLfloat),
VB->ObjPtr, plane );
input->count = VB->ObjPtr->count;
}
else {
/* fog coordinates = eye Z coordinates (use ABS later) */
input = &store->input;
if (VB->EyePtr->size < 2)
_mesa_vector4f_clean_elem( VB->EyePtr, VB->Count, 2 );
input->data = (GLfloat (*)[4]) &(VB->EyePtr->data[0][2]);
input->start = VB->EyePtr->start+2;
input->stride = VB->EyePtr->stride;
input->count = VB->EyePtr->count;
}
}
else {
/* use glFogCoord() coordinates */
input = VB->FogCoordPtr; /* source data */
/* input->count may be one if glFogCoord was only called once
* before glBegin. But we need to compute fog for all vertices.
*/
input->count = VB->ObjPtr->count;
VB->FogCoordPtr = &store->fogcoord; /* dest data */
}
if (tnl->_DoVertexFog) {
/* compute blend factors from fog coordinates */
compute_fog_blend_factors( ctx, VB->FogCoordPtr, input );
}
else {
/* results = incoming fog coords (compute fog per-fragment later) */
VB->FogCoordPtr = input;
}
VB->AttribPtr[_TNL_ATTRIB_FOG] = VB->FogCoordPtr;
return GL_TRUE;
}
