/**
* Prepare/validate middle part of the vertex pipeline.
* NOTE: if you change this function, also look at the LLVM
* function llvm_middle_end_prepare() for similar changes.
*/
static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
unsigned prim,
unsigned opt,
unsigned *max_vertices )
{
struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
struct draw_context *draw = fpme->draw;
struct draw_vertex_shader *vs = draw->vs.vertex_shader;
struct draw_geometry_shader *gs = draw->gs.geometry_shader;
unsigned i;
unsigned instance_id_index = ~0;
unsigned gs_out_prim = (gs ? gs->output_primitive : prim);
/* Add one to num_outputs because the pipeline occasionally tags on
* an additional texcoord, eg for AA lines.
*/
unsigned nr = MAX2( vs->info.num_inputs,
vs->info.num_outputs + 1 );
if (gs) {
nr = MAX2(nr, gs->info.num_outputs + 1);
}
/* Scan for instanceID system value.
*/
for (i = 0; i < vs->info.num_inputs; i++) {
if (vs->info.input_semantic_name[i] == TGSI_SEMANTIC_INSTANCEID) {
instance_id_index = i;
break;
}
}
fpme->input_prim = prim;
fpme->opt = opt;
/* Always leave room for the vertex header whether we need it or
* not. It's hard to get rid of it in particular because of the
* viewport code in draw_pt_post_vs.c.
*/
fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
draw_pt_fetch_prepare( fpme->fetch,
vs->info.num_inputs,
fpme->vertex_size,
instance_id_index );
/* XXX: it's not really gl rasterization rules we care about here,
* but gl vs dx9 clip spaces.
*/
draw_pt_post_vs_prepare( fpme->post_vs,
draw->clip_xy,
draw->clip_z,
draw->clip_user,
draw->guard_band_xy,
draw->identity_viewport,
(boolean)draw->rasterizer->gl_rasterization_rules,
(draw->vs.edgeflag_output ? TRUE : FALSE) );
draw_pt_so_emit_prepare( fpme->so_emit, FALSE );
if (!(opt & PT_PIPELINE)) {
draw_pt_emit_prepare( fpme->emit,
gs_out_prim,
max_vertices );
*max_vertices = MAX2( *max_vertices, 4096 );
}
else {
/* limit max fetches by limiting max_vertices */
*max_vertices = 4096;
}
/* No need to prepare the shader.
*/
vs->prepare(vs, draw);
}
static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
unsigned prim,
unsigned opt,
unsigned *max_vertices )
{
struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
struct draw_context *draw = fpme->draw;
struct draw_vertex_shader *vs = draw->vs.vertex_shader;
unsigned i;
unsigned instance_id_index = ~0;
/* Add one to num_outputs because the pipeline occasionally tags on
* an additional texcoord, eg for AA lines.
*/
unsigned nr = MAX2( vs->info.num_inputs,
vs->info.num_outputs + 1 );
/* Scan for instanceID system value.
*/
for (i = 0; i < vs->info.num_inputs; i++) {
if (vs->info.input_semantic_name[i] == TGSI_SEMANTIC_INSTANCEID) {
instance_id_index = i;
break;
}
}
fpme->prim = prim;
fpme->opt = opt;
/* Always leave room for the vertex header whether we need it or
* not. It's hard to get rid of it in particular because of the
* viewport code in draw_pt_post_vs.c.
*/
fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
draw_pt_fetch_prepare( fpme->fetch,
vs->info.num_inputs,
fpme->vertex_size,
instance_id_index );
/* XXX: it's not really gl rasterization rules we care about here,
* but gl vs dx9 clip spaces.
*/
draw_pt_post_vs_prepare( fpme->post_vs,
(boolean)draw->bypass_clipping,
(boolean)draw->identity_viewport,
(boolean)draw->rasterizer->gl_rasterization_rules,
(draw->vs.edgeflag_output ? true : false) );
if (!(opt & PT_PIPELINE)) {
draw_pt_emit_prepare( fpme->emit,
prim,
max_vertices );
*max_vertices = MAX2( *max_vertices,
DRAW_PIPE_MAX_VERTICES );
}
else {
*max_vertices = DRAW_PIPE_MAX_VERTICES;
}
/* return even number */
*max_vertices = *max_vertices & ~1;
/* No need to prepare the shader.
*/
vs->prepare(vs, draw);
}
