enum pipe_error
svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl,
unsigned prim,
unsigned start,
unsigned count)
{
unsigned gen_prim, gen_size, gen_nr, gen_type;
u_generate_func gen_func;
enum pipe_error ret = PIPE_OK;
if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL &&
prim >= PIPE_PRIM_TRIANGLES)
{
gen_type = u_unfilled_generator( prim,
start,
count,
hwtnl->api_fillmode,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
else {
gen_type = u_index_generator( svga_hw_prims,
prim,
start,
count,
hwtnl->api_pv,
hwtnl->hw_pv,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
if (gen_type == U_GENERATE_LINEAR) {
return simple_draw_arrays( hwtnl, gen_prim, start, count );
}
else {
struct pipe_buffer *gen_buf = NULL;
/* Need to draw as indexed primitive.
* Potentially need to run the gen func to build an index buffer.
*/
ret = retrieve_or_generate_indices( hwtnl,
prim,
gen_type,
gen_nr,
gen_size,
gen_func,
&gen_buf );
if (ret)
goto done;
ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
gen_buf,
gen_size,
0,
count - 1,
gen_prim,
0,
gen_nr,
start );
if (ret)
goto done;
done:
if (gen_buf)
pipe_buffer_reference( &gen_buf, NULL );
return ret;
}
}
enum pipe_error
svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl,
unsigned prim,
unsigned start,
unsigned count)
{
unsigned gen_prim, gen_size, gen_nr, gen_type;
u_generate_func gen_func;
enum pipe_error ret = PIPE_OK;
if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL &&
prim >= PIPE_PRIM_TRIANGLES)
{
/* Convert unfilled polygons into points, lines, triangles */
gen_type = u_unfilled_generator( prim,
start,
count,
hwtnl->api_fillmode,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
else {
/* Convert PIPE_PRIM_LINE_LOOP to PIPE_PRIM_LINESTRIP,
* convert PIPE_PRIM_POLYGON to PIPE_PRIM_TRIANGLE_FAN,
* etc, if needed (as determined by svga_hw_prims mask).
*/
gen_type = u_index_generator( svga_hw_prims,
prim,
start,
count,
hwtnl->api_pv,
hwtnl->hw_pv,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
if (gen_type == U_GENERATE_LINEAR) {
return simple_draw_arrays( hwtnl, gen_prim, start, count );
}
else {
struct pipe_resource *gen_buf = NULL;
/* Need to draw as indexed primitive.
* Potentially need to run the gen func to build an index buffer.
*/
ret = retrieve_or_generate_indices( hwtnl,
prim,
gen_type,
gen_nr,
gen_size,
gen_func,
&gen_buf );
if (ret != PIPE_OK)
goto done;
ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
gen_buf,
gen_size,
start,
0,
count - 1,
gen_prim,
0,
gen_nr );
if (ret != PIPE_OK)
goto done;
done:
if (gen_buf)
pipe_resource_reference( &gen_buf, NULL );
return ret;
}
}
enum pipe_error
svga_hwtnl_draw_arrays(struct svga_hwtnl *hwtnl,
enum pipe_prim_type prim, unsigned start, unsigned count,
unsigned start_instance, unsigned instance_count)
{
enum pipe_prim_type gen_prim;
unsigned gen_size, gen_nr;
enum indices_mode gen_type;
u_generate_func gen_func;
enum pipe_error ret = PIPE_OK;
unsigned api_pv = hwtnl->api_pv;
struct svga_context *svga = hwtnl->svga;
if (svga->curr.rast->templ.fill_front !=
svga->curr.rast->templ.fill_back) {
assert(hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL);
}
if (svga->curr.rast->templ.flatshade &&
svga->state.hw_draw.fs->constant_color_output) {
/* The fragment color is a constant, not per-vertex so the whole
* primitive will be the same color (except for possible blending).
* We can ignore the current provoking vertex state and use whatever
* the hardware wants.
*/
api_pv = hwtnl->hw_pv;
if (hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL) {
/* Do some simple primitive conversions to avoid index buffer
* generation below. Note that polygons and quads are not directly
* supported by the svga device. Also note, we can only do this
* for flat/constant-colored rendering because of provoking vertex.
*/
if (prim == PIPE_PRIM_POLYGON) {
prim = PIPE_PRIM_TRIANGLE_FAN;
}
else if (prim == PIPE_PRIM_QUADS && count == 4) {
prim = PIPE_PRIM_TRIANGLE_FAN;
}
}
}
if (svga_need_unfilled_fallback(hwtnl, prim)) {
/* Convert unfilled polygons into points, lines, triangles */
gen_type = u_unfilled_generator(prim,
start,
count,
hwtnl->api_fillmode,
&gen_prim,
&gen_size, &gen_nr, &gen_func);
}
else {
/* Convert PIPE_PRIM_LINE_LOOP to PIPE_PRIM_LINESTRIP,
* convert PIPE_PRIM_POLYGON to PIPE_PRIM_TRIANGLE_FAN,
* etc, if needed (as determined by svga_hw_prims mask).
*/
gen_type = u_index_generator(svga_hw_prims,
prim,
start,
count,
api_pv,
hwtnl->hw_pv,
&gen_prim, &gen_size, &gen_nr, &gen_func);
}
if (gen_type == U_GENERATE_LINEAR) {
return simple_draw_arrays(hwtnl, gen_prim, start, count,
start_instance, instance_count);
}
else {
struct pipe_resource *gen_buf = NULL;
/* Need to draw as indexed primitive.
* Potentially need to run the gen func to build an index buffer.
*/
ret = retrieve_or_generate_indices(hwtnl,
prim,
gen_type,
gen_nr,
gen_size, gen_func, &gen_buf);
if (ret != PIPE_OK)
goto done;
pipe_debug_message(&svga->debug.callback, PERF_INFO,
"generating temporary index buffer for drawing %s",
u_prim_name(prim));
ret = svga_hwtnl_simple_draw_range_elements(hwtnl,
gen_buf,
gen_size,
start,
0,
count - 1,
gen_prim, 0, gen_nr,
start_instance,
instance_count);
if (ret != PIPE_OK)
goto done;
done:
if (gen_buf)
pipe_resource_reference(&gen_buf, NULL);
return ret;
}
}