/**
* The vertex info describes how to convert the post-transformed vertices
* (simple float[][4]) used by the 'draw' module into vertices for
* rasterization.
*
* This function validates the vertex layout.
*/
static void
compute_vertex_info(struct llvmpipe_context *llvmpipe)
{
const struct tgsi_shader_info *fsInfo = &llvmpipe->fs->info.base;
struct vertex_info *vinfo = &llvmpipe->vertex_info;
int vs_index;
uint i;
draw_prepare_shader_outputs(llvmpipe->draw);
/*
* Those can't actually be 0 (because pos is always at 0).
* But use ints anyway to avoid confusion (in vs outputs, they
* can very well be at pos 0).
*/
llvmpipe->color_slot[0] = -1;
llvmpipe->color_slot[1] = -1;
llvmpipe->bcolor_slot[0] = -1;
llvmpipe->bcolor_slot[1] = -1;
llvmpipe->viewport_index_slot = -1;
llvmpipe->layer_slot = -1;
llvmpipe->face_slot = -1;
llvmpipe->psize_slot = -1;
/*
* Match FS inputs against VS outputs, emitting the necessary
* attributes. Could cache these structs and look them up with a
* combination of fragment shader, vertex shader ids.
*/
vinfo->num_attribs = 0;
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_POSITION, 0);
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
for (i = 0; i < fsInfo->num_inputs; i++) {
/*
* Search for each input in current vs output:
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
fsInfo->input_semantic_name[i],
fsInfo->input_semantic_index[i]);
if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR &&
fsInfo->input_semantic_index[i] < 2) {
int idx = fsInfo->input_semantic_index[i];
llvmpipe->color_slot[idx] = (int)vinfo->num_attribs;
}
if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_FACE) {
llvmpipe->face_slot = (int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
/*
* For vp index and layer, if the fs requires them but the vs doesn't
* provide them, draw (vbuf) will give us the required 0 (slot -1).
* (This means in this case we'll also use those slots in setup, which
* isn't necessary but they'll contain the correct (0) value.)
*/
} else if (fsInfo->input_semantic_name[i] ==
TGSI_SEMANTIC_VIEWPORT_INDEX) {
llvmpipe->viewport_index_slot = (int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
} else if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_LAYER) {
llvmpipe->layer_slot = (int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
} else {
/*
* Note that we'd actually want to skip position (as we won't use
* the attribute in the fs) but can't. The reason is that we don't
* actually have a input/output map for setup (even though it looks
* like we do...). Could adjust for this though even without a map
* (in llvmpipe_create_fs_state()).
*/
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
}
}
/* Figure out if we need bcolor as well.
*/
for (i = 0; i < 2; i++) {
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_BCOLOR, i);
if (vs_index >= 0) {
llvmpipe->bcolor_slot[i] = (int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
}
}
/* Figure out if we need pointsize as well.
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_PSIZE, 0);
if (vs_index >= 0) {
llvmpipe->psize_slot = (int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
}
/* Figure out if we need viewport index (if it wasn't already in fs input) */
if (llvmpipe->viewport_index_slot < 0) {
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_VIEWPORT_INDEX,
0);
if (vs_index >= 0) {
llvmpipe->viewport_index_slot =(int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
}
}
/* Figure out if we need layer (if it wasn't already in fs input) */
if (llvmpipe->layer_slot < 0) {
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_LAYER,
0);
if (vs_index >= 0) {
llvmpipe->layer_slot = (int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
}
}
draw_compute_vertex_size(vinfo);
lp_setup_set_vertex_info(llvmpipe->setup, vinfo);
}
/**
* The vertex info describes how to convert the post-transformed vertices
* (simple float[][4]) used by the 'draw' module into vertices for
* rasterization.
*
* This function validates the vertex layout.
*/
static void
compute_vertex_info(struct llvmpipe_context *llvmpipe)
{
const struct lp_fragment_shader *lpfs = llvmpipe->fs;
struct vertex_info *vinfo = &llvmpipe->vertex_info;
int vs_index;
uint i;
draw_prepare_shader_outputs(llvmpipe->draw);
llvmpipe->color_slot[0] = 0;
llvmpipe->color_slot[1] = 0;
llvmpipe->bcolor_slot[0] = 0;
llvmpipe->bcolor_slot[1] = 0;
llvmpipe->viewport_index_slot = 0;
llvmpipe->layer_slot = 0;
llvmpipe->face_slot = 0;
llvmpipe->psize_slot = 0;
/*
* Match FS inputs against VS outputs, emitting the necessary
* attributes. Could cache these structs and look them up with a
* combination of fragment shader, vertex shader ids.
*/
vinfo->num_attribs = 0;
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_POSITION,
0);
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
for (i = 0; i < lpfs->info.base.num_inputs; i++) {
/*
* Search for each input in current vs output:
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
lpfs->info.base.input_semantic_name[i],
lpfs->info.base.input_semantic_index[i]);
if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_COLOR &&
lpfs->info.base.input_semantic_index[i] < 2) {
int idx = lpfs->info.base.input_semantic_index[i];
llvmpipe->color_slot[idx] = vinfo->num_attribs;
}
if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_FACE) {
llvmpipe->face_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
} else if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_PRIMID) {
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
/*
* For vp index and layer, if the fs requires them but the vs doesn't
* provide them, store the slot - we'll later replace the data directly
* with zero (as required by ARB_fragment_layer_viewport). This is
* because draw itself just redirects them to whatever was at output 0.
* We'll also store the real vpindex/layer slot for setup use.
*/
} else if (lpfs->info.base.input_semantic_name[i] ==
TGSI_SEMANTIC_VIEWPORT_INDEX) {
if (vs_index >= 0) {
llvmpipe->viewport_index_slot = vinfo->num_attribs;
}
else {
llvmpipe->fake_vpindex_slot = vinfo->num_attribs;
}
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
} else if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_LAYER) {
if (vs_index >= 0) {
llvmpipe->layer_slot = vinfo->num_attribs;
}
else {
llvmpipe->fake_layer_slot = vinfo->num_attribs;
}
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
} else {
/*
* Emit the requested fs attribute for all but position.
*/
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
}
}
/* Figure out if we need bcolor as well.
*/
for (i = 0; i < 2; i++) {
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_BCOLOR, i);
if (vs_index >= 0) {
llvmpipe->bcolor_slot[i] = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
}
}
/* Figure out if we need pointsize as well.
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_PSIZE, 0);
if (vs_index >= 0) {
llvmpipe->psize_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
}
/* Figure out if we need viewport index (if it wasn't already in fs input) */
if (llvmpipe->viewport_index_slot == 0) {
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_VIEWPORT_INDEX,
0);
if (vs_index >= 0) {
llvmpipe->viewport_index_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
}
}
/* Figure out if we need layer (if it wasn't already in fs input) */
if (llvmpipe->layer_slot == 0) {
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_LAYER,
0);
if (vs_index >= 0) {
llvmpipe->layer_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
}
}
draw_compute_vertex_size(vinfo);
lp_setup_set_vertex_info(llvmpipe->setup, vinfo);
}
/**
* The vertex info describes how to convert the post-transformed vertices
* (simple float[][4]) used by the 'draw' module into vertices for
* rasterization.
*
* This function validates the vertex layout.
*/
static void
compute_vertex_info(struct llvmpipe_context *llvmpipe)
{
const struct lp_fragment_shader *lpfs = llvmpipe->fs;
struct vertex_info *vinfo = &llvmpipe->vertex_info;
int vs_index;
uint i;
llvmpipe->color_slot[0] = -1;
llvmpipe->color_slot[1] = -1;
llvmpipe->bcolor_slot[0] = -1;
llvmpipe->bcolor_slot[1] = -1;
/*
* Match FS inputs against VS outputs, emitting the necessary
* attributes. Could cache these structs and look them up with a
* combination of fragment shader, vertex shader ids.
*/
vinfo->num_attribs = 0;
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_POSITION,
0);
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
for (i = 0; i < lpfs->info.base.num_inputs; i++) {
/*
* Search for each input in current vs output:
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
lpfs->info.base.input_semantic_name[i],
lpfs->info.base.input_semantic_index[i]);
if (lpfs->info.base.input_semantic_name[i] == TGSI_SEMANTIC_COLOR &&
lpfs->info.base.input_semantic_index[i] < 2) {
int idx = lpfs->info.base.input_semantic_index[i];
llvmpipe->color_slot[idx] = (int)vinfo->num_attribs;
}
/*
* Emit the requested fs attribute for all but position.
*/
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
}
/* Figure out if we need bcolor as well.
*/
for (i = 0; i < 2; i++) {
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_BCOLOR, i);
if (vs_index >= 0) {
llvmpipe->bcolor_slot[i] = (int)vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
}
}
/* Figure out if we need pointsize as well.
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_PSIZE, 0);
if (vs_index >= 0) {
llvmpipe->psize_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
}
/* Figure out if we need viewport index */
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_VIEWPORT_INDEX,
0);
if (vs_index >= 0) {
llvmpipe->viewport_index_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
} else {
llvmpipe->viewport_index_slot = 0;
}
/* Figure out if we need layer */
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_LAYER,
0);
if (vs_index >= 0) {
llvmpipe->layer_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
} else {
llvmpipe->layer_slot = 0;
}
draw_compute_vertex_size(vinfo);
lp_setup_set_vertex_info(llvmpipe->setup, vinfo);
}
/**
* The vertex info describes how to convert the post-transformed vertices
* (simple float[][4]) used by the 'draw' module into vertices for
* rasterization.
*
* This function validates the vertex layout.
*/
static void
compute_vertex_info(struct llvmpipe_context *llvmpipe)
{
const struct lp_fragment_shader *lpfs = llvmpipe->fs;
struct vertex_info *vinfo = &llvmpipe->vertex_info;
struct lp_shader_input *inputs = llvmpipe->inputs;
unsigned vs_index;
uint i;
/*
* Match FS inputs against VS outputs, emitting the necessary attributes.
*/
vinfo->num_attribs = 0;
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_POSITION,
0);
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
for (i = 0; i < lpfs->info.num_inputs; i++) {
/*
* Search for each input in current vs output:
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
lpfs->info.input_semantic_name[i],
lpfs->info.input_semantic_index[i]);
if (vs_index < 0) {
/*
* This can happen with sprite coordinates - the vertex
* shader doesn't need to provide an output as we generate
* them internally. However, lets keep pretending that there
* is something there to not confuse other code.
*/
vs_index = 0;
}
/* This can be pre-computed, except for flatshade:
*/
inputs[i].usage_mask = lpfs->info.input_usage_mask[i];
switch (lpfs->info.input_interpolate[i]) {
case TGSI_INTERPOLATE_CONSTANT:
inputs[i].interp = LP_INTERP_CONSTANT;
break;
case TGSI_INTERPOLATE_LINEAR:
inputs[i].interp = LP_INTERP_LINEAR;
break;
case TGSI_INTERPOLATE_PERSPECTIVE:
inputs[i].interp = LP_INTERP_PERSPECTIVE;
break;
default:
assert(0);
break;
}
switch (lpfs->info.input_semantic_name[i]) {
case TGSI_SEMANTIC_FACE:
inputs[i].interp = LP_INTERP_FACING;
break;
case TGSI_SEMANTIC_POSITION:
/* Position was already emitted above
*/
inputs[i].interp = LP_INTERP_POSITION;
inputs[i].src_index = 0;
continue;
case TGSI_SEMANTIC_COLOR:
/* Colors are linearly inputs[i].interpolated in the fragment shader
* even when flatshading is active. This just tells the
* setup module to use coefficients with ddx==0 and
* ddy==0.
*/
if (llvmpipe->rasterizer->flatshade)
inputs[i].interp = LP_INTERP_CONSTANT;
break;
default:
break;
}
/*
* Emit the requested fs attribute for all but position.
*/
inputs[i].src_index = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, vs_index);
}
/* Figure out if we need pointsize as well.
*/
vs_index = draw_find_shader_output(llvmpipe->draw,
TGSI_SEMANTIC_PSIZE, 0);
if (vs_index > 0) {
llvmpipe->psize_slot = vinfo->num_attribs;
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
}
llvmpipe->num_inputs = lpfs->info.num_inputs;
draw_compute_vertex_size(vinfo);
lp_setup_set_vertex_info(llvmpipe->setup, vinfo);
lp_setup_set_fs_inputs(llvmpipe->setup,
inputs,
lpfs->info.num_inputs);
}