/* Overall we split things into:
* - frontend -- prepare fetch_elts, draw_elts - eg vcache
* - middle -- fetch, shade, cliptest, viewport
* - pipeline -- the prim pipeline: clipping, wide lines, etc
* - backend -- the vbuf_render provided by the driver.
*/
static boolean
draw_pt_arrays(struct draw_context *draw,
unsigned prim,
unsigned start,
unsigned count)
{
struct draw_pt_front_end *frontend = NULL;
struct draw_pt_middle_end *middle = NULL;
unsigned opt = 0;
/* Sanitize primitive length:
*/
{
unsigned first, incr;
draw_pt_split_prim(prim, &first, &incr);
count = trim(count, first, incr);
if (count < first)
return TRUE;
}
if (!draw->render) {
opt |= PT_PIPELINE;
}
if (draw_need_pipeline(draw,
draw->rasterizer,
prim)) {
opt |= PT_PIPELINE;
}
if (!draw->bypass_clipping && !draw->pt.test_fse) {
opt |= PT_CLIPTEST;
}
if (!draw->rasterizer->bypass_vs) {
opt |= PT_SHADE;
}
if (opt == 0)
middle = draw->pt.middle.fetch_emit;
else if (opt == PT_SHADE && !draw->pt.no_fse)
middle = draw->pt.middle.fetch_shade_emit;
else
middle = draw->pt.middle.general;
/* Pick the right frontend
*/
if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
frontend = draw->pt.front.vcache;
} else {
frontend = draw->pt.front.varray;
}
frontend->prepare( frontend, prim, middle, opt );
frontend->run(frontend,
draw_pt_elt_func(draw),
draw_pt_elt_ptr(draw, start),
count);
frontend->finish( frontend );
return TRUE;
}
/* Overall we split things into:
* - frontend -- prepare fetch_elts, draw_elts - eg vsplit
* - middle -- fetch, shade, cliptest, viewport
* - pipeline -- the prim pipeline: clipping, wide lines, etc
* - backend -- the vbuf_render provided by the driver.
*/
static boolean
draw_pt_arrays(struct draw_context *draw,
unsigned prim,
unsigned start,
unsigned count)
{
struct draw_pt_front_end *frontend = NULL;
struct draw_pt_middle_end *middle = NULL;
unsigned opt = 0;
/* Sanitize primitive length:
*/
{
unsigned first, incr;
draw_pt_split_prim(prim, &first, &incr);
count = draw_pt_trim_count(count, first, incr);
if (count < first)
return TRUE;
}
if (!draw->force_passthrough) {
unsigned gs_out_prim = (draw->gs.geometry_shader ?
draw->gs.geometry_shader->output_primitive :
prim);
if (!draw->render) {
opt |= PT_PIPELINE;
}
if (draw_need_pipeline(draw,
draw->rasterizer,
gs_out_prim)) {
opt |= PT_PIPELINE;
}
if ((draw->clip_xy ||
draw->clip_z ||
draw->clip_user) && !draw->pt.test_fse) {
opt |= PT_CLIPTEST;
}
opt |= PT_SHADE;
}
if (draw->pt.middle.llvm) {
middle = draw->pt.middle.llvm;
} else {
if (opt == 0)
middle = draw->pt.middle.fetch_emit;
else if (opt == PT_SHADE && !draw->pt.no_fse)
middle = draw->pt.middle.fetch_shade_emit;
else
middle = draw->pt.middle.general;
}
frontend = draw->pt.frontend;
if (frontend ) {
if (draw->pt.prim != prim || draw->pt.opt != opt) {
/* In certain conditions switching primitives requires us to flush
* and validate the different stages. One example is when smooth
* lines are active but first drawn with triangles and then with
* lines.
*/
draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
frontend = NULL;
} else if (draw->pt.eltSize != draw->pt.user.eltSize) {
/* Flush draw state if eltSize changed.
* This could be improved so only the frontend is flushed since it
* converts all indices to ushorts and the fetch part of the middle
* always perpares both linear and indexed.
*/
frontend->flush( frontend, DRAW_FLUSH_STATE_CHANGE );
frontend = NULL;
}
}
if (!frontend) {
frontend = draw->pt.front.vsplit;
frontend->prepare( frontend, prim, middle, opt );
draw->pt.frontend = frontend;
draw->pt.eltSize = draw->pt.user.eltSize;
draw->pt.prim = prim;
draw->pt.opt = opt;
}
frontend->run( frontend, start, count );
return TRUE;
}