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path: root/src/gallium/drivers/llvmpipe/lp_setup_vbuf.c
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Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_setup_vbuf.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_setup_vbuf.c266
1 files changed, 173 insertions, 93 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_vbuf.c b/src/gallium/drivers/llvmpipe/lp_setup_vbuf.c
index 5d3122e..f6a424f 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_vbuf.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup_vbuf.c
@@ -131,11 +131,12 @@ static INLINE const_float4_ptr get_vert( const void *vertex_buffer,
* draw elements / indexed primitives
*/
static void
-lp_setup_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
+lp_setup_draw_elements(struct vbuf_render *vbr, const ushort *indices, uint nr)
{
struct lp_setup_context *setup = lp_setup_context(vbr);
const unsigned stride = setup->vertex_info->size * sizeof(float);
const void *vertex_buffer = setup->vertex_buffer;
+ const boolean flatshade_first = setup->flatshade_first;
unsigned i;
lp_setup_update_state(setup);
@@ -178,35 +179,28 @@ lp_setup_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
break;
case PIPE_PRIM_TRIANGLES:
- if (setup->flatshade_first) {
- for (i = 2; i < nr; i += 3) {
- setup->triangle( setup,
- get_vert(vertex_buffer, indices[i-1], stride),
- get_vert(vertex_buffer, indices[i-0], stride),
- get_vert(vertex_buffer, indices[i-2], stride) );
- }
- }
- else {
- for (i = 2; i < nr; i += 3) {
- setup->triangle( setup,
- get_vert(vertex_buffer, indices[i-2], stride),
- get_vert(vertex_buffer, indices[i-1], stride),
- get_vert(vertex_buffer, indices[i-0], stride) );
- }
+ for (i = 2; i < nr; i += 3) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-2], stride),
+ get_vert(vertex_buffer, indices[i-1], stride),
+ get_vert(vertex_buffer, indices[i-0], stride) );
}
break;
case PIPE_PRIM_TRIANGLE_STRIP:
- if (setup->flatshade_first) {
+ if (flatshade_first) {
for (i = 2; i < nr; i += 1) {
+ /* emit first triangle vertex as first triangle vertex */
setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-2], stride),
get_vert(vertex_buffer, indices[i+(i&1)-1], stride),
- get_vert(vertex_buffer, indices[i-(i&1)], stride),
- get_vert(vertex_buffer, indices[i-2], stride) );
+ get_vert(vertex_buffer, indices[i-(i&1)], stride) );
+
}
}
else {
for (i = 2; i < nr; i += 1) {
+ /* emit last triangle vertex as last triangle vertex */
setup->triangle( setup,
get_vert(vertex_buffer, indices[i+(i&1)-2], stride),
get_vert(vertex_buffer, indices[i-(i&1)-1], stride),
@@ -216,16 +210,18 @@ lp_setup_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
break;
case PIPE_PRIM_TRIANGLE_FAN:
- if (setup->flatshade_first) {
+ if (flatshade_first) {
for (i = 2; i < nr; i += 1) {
+ /* emit first non-spoke vertex as first vertex */
setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-1], stride),
get_vert(vertex_buffer, indices[i-0], stride),
- get_vert(vertex_buffer, indices[0], stride),
- get_vert(vertex_buffer, indices[i-1], stride) );
+ get_vert(vertex_buffer, indices[0], stride) );
}
}
else {
for (i = 2; i < nr; i += 1) {
+ /* emit last non-spoke vertex as last vertex */
setup->triangle( setup,
get_vert(vertex_buffer, indices[0], stride),
get_vert(vertex_buffer, indices[i-1], stride),
@@ -235,43 +231,88 @@ lp_setup_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
break;
case PIPE_PRIM_QUADS:
- for (i = 3; i < nr; i += 4) {
- setup->triangle( setup,
+ /* GL quads don't follow provoking vertex convention */
+ if (flatshade_first) {
+ /* emit last quad vertex as first triangle vertex */
+ for (i = 3; i < nr; i += 4) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-0], stride),
+ get_vert(vertex_buffer, indices[i-3], stride),
+ get_vert(vertex_buffer, indices[i-2], stride) );
+
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-0], stride),
+ get_vert(vertex_buffer, indices[i-2], stride),
+ get_vert(vertex_buffer, indices[i-1], stride) );
+ }
+ }
+ else {
+ /* emit last quad vertex as last triangle vertex */
+ for (i = 3; i < nr; i += 4) {
+ setup->triangle( setup,
get_vert(vertex_buffer, indices[i-3], stride),
get_vert(vertex_buffer, indices[i-2], stride),
get_vert(vertex_buffer, indices[i-0], stride) );
- setup->triangle( setup,
- get_vert(vertex_buffer, indices[i-2], stride),
- get_vert(vertex_buffer, indices[i-1], stride),
- get_vert(vertex_buffer, indices[i-0], stride) );
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-2], stride),
+ get_vert(vertex_buffer, indices[i-1], stride),
+ get_vert(vertex_buffer, indices[i-0], stride) );
+ }
}
break;
case PIPE_PRIM_QUAD_STRIP:
- for (i = 3; i < nr; i += 2) {
- setup->triangle( setup,
- get_vert(vertex_buffer, indices[i-3], stride),
- get_vert(vertex_buffer, indices[i-2], stride),
- get_vert(vertex_buffer, indices[i-0], stride) );
- setup->triangle( setup,
- get_vert(vertex_buffer, indices[i-1], stride),
- get_vert(vertex_buffer, indices[i-3], stride),
- get_vert(vertex_buffer, indices[i-0], stride) );
+ /* GL quad strips don't follow provoking vertex convention */
+ if (flatshade_first) {
+ /* emit last quad vertex as first triangle vertex */
+ for (i = 3; i < nr; i += 2) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-0], stride),
+ get_vert(vertex_buffer, indices[i-3], stride),
+ get_vert(vertex_buffer, indices[i-2], stride) );
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-0], stride),
+ get_vert(vertex_buffer, indices[i-1], stride),
+ get_vert(vertex_buffer, indices[i-3], stride) );
+ }
+ }
+ else {
+ /* emit last quad vertex as last triangle vertex */
+ for (i = 3; i < nr; i += 2) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-3], stride),
+ get_vert(vertex_buffer, indices[i-2], stride),
+ get_vert(vertex_buffer, indices[i-0], stride) );
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-1], stride),
+ get_vert(vertex_buffer, indices[i-3], stride),
+ get_vert(vertex_buffer, indices[i-0], stride) );
+ }
}
break;
case PIPE_PRIM_POLYGON:
/* Almost same as tri fan but the _first_ vertex specifies the flat
- * shading color. Note that the first polygon vertex is passed as
- * the last triangle vertex here.
- * flatshade_first state makes no difference.
+ * shading color.
*/
- for (i = 2; i < nr; i += 1) {
- setup->triangle( setup,
- get_vert(vertex_buffer, indices[i-0], stride),
- get_vert(vertex_buffer, indices[i-1], stride),
- get_vert(vertex_buffer, indices[0], stride) );
+ if (flatshade_first) {
+ /* emit first polygon vertex as first triangle vertex */
+ for (i = 2; i < nr; i += 1) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[0], stride),
+ get_vert(vertex_buffer, indices[i-1], stride),
+ get_vert(vertex_buffer, indices[i-0], stride) );
+ }
+ }
+ else {
+ /* emit first polygon vertex as last triangle vertex */
+ for (i = 2; i < nr; i += 1) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, indices[i-1], stride),
+ get_vert(vertex_buffer, indices[i-0], stride),
+ get_vert(vertex_buffer, indices[0], stride) );
+ }
}
break;
@@ -292,6 +333,7 @@ lp_setup_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
const unsigned stride = setup->vertex_info->size * sizeof(float);
const void *vertex_buffer =
(void *) get_vert(setup->vertex_buffer, start, stride);
+ const boolean flatshade_first = setup->flatshade_first;
unsigned i;
lp_setup_update_state(setup);
@@ -334,35 +376,27 @@ lp_setup_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
break;
case PIPE_PRIM_TRIANGLES:
- if (setup->flatshade_first) {
- for (i = 2; i < nr; i += 3) {
- setup->triangle( setup,
- get_vert(vertex_buffer, i-1, stride),
- get_vert(vertex_buffer, i-0, stride),
- get_vert(vertex_buffer, i-2, stride) );
- }
- }
- else {
- for (i = 2; i < nr; i += 3) {
- setup->triangle( setup,
- get_vert(vertex_buffer, i-2, stride),
- get_vert(vertex_buffer, i-1, stride),
- get_vert(vertex_buffer, i-0, stride) );
- }
+ for (i = 2; i < nr; i += 3) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-2, stride),
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-0, stride) );
}
break;
case PIPE_PRIM_TRIANGLE_STRIP:
- if (setup->flatshade_first) {
+ if (flatshade_first) {
for (i = 2; i < nr; i++) {
+ /* emit first triangle vertex as first triangle vertex */
setup->triangle( setup,
+ get_vert(vertex_buffer, i-2, stride),
get_vert(vertex_buffer, i+(i&1)-1, stride),
- get_vert(vertex_buffer, i-(i&1), stride),
- get_vert(vertex_buffer, i-2, stride) );
+ get_vert(vertex_buffer, i-(i&1), stride) );
}
}
else {
for (i = 2; i < nr; i++) {
+ /* emit last triangle vertex as last triangle vertex */
setup->triangle( setup,
get_vert(vertex_buffer, i+(i&1)-2, stride),
get_vert(vertex_buffer, i-(i&1)-1, stride),
@@ -372,16 +406,18 @@ lp_setup_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
break;
case PIPE_PRIM_TRIANGLE_FAN:
- if (setup->flatshade_first) {
+ if (flatshade_first) {
for (i = 2; i < nr; i += 1) {
+ /* emit first non-spoke vertex as first vertex */
setup->triangle( setup,
+ get_vert(vertex_buffer, i-1, stride),
get_vert(vertex_buffer, i-0, stride),
- get_vert(vertex_buffer, 0, stride),
- get_vert(vertex_buffer, i-1, stride) );
+ get_vert(vertex_buffer, 0, stride) );
}
}
else {
for (i = 2; i < nr; i += 1) {
+ /* emit last non-spoke vertex as last vertex */
setup->triangle( setup,
get_vert(vertex_buffer, 0, stride),
get_vert(vertex_buffer, i-1, stride),
@@ -391,42 +427,86 @@ lp_setup_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
break;
case PIPE_PRIM_QUADS:
- for (i = 3; i < nr; i += 4) {
- setup->triangle( setup,
- get_vert(vertex_buffer, i-3, stride),
- get_vert(vertex_buffer, i-2, stride),
- get_vert(vertex_buffer, i-0, stride) );
- setup->triangle( setup,
- get_vert(vertex_buffer, i-2, stride),
- get_vert(vertex_buffer, i-1, stride),
- get_vert(vertex_buffer, i-0, stride) );
+ /* GL quads don't follow provoking vertex convention */
+ if (flatshade_first) {
+ /* emit last quad vertex as first triangle vertex */
+ for (i = 3; i < nr; i += 4) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-0, stride),
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-2, stride) );
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-0, stride),
+ get_vert(vertex_buffer, i-2, stride),
+ get_vert(vertex_buffer, i-1, stride) );
+ }
+ }
+ else {
+ /* emit last quad vertex as last triangle vertex */
+ for (i = 3; i < nr; i += 4) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-2, stride),
+ get_vert(vertex_buffer, i-0, stride) );
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-2, stride),
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-0, stride) );
+ }
}
break;
case PIPE_PRIM_QUAD_STRIP:
- for (i = 3; i < nr; i += 2) {
- setup->triangle( setup,
- get_vert(vertex_buffer, i-3, stride),
- get_vert(vertex_buffer, i-2, stride),
- get_vert(vertex_buffer, i-0, stride) );
- setup->triangle( setup,
- get_vert(vertex_buffer, i-1, stride),
- get_vert(vertex_buffer, i-3, stride),
- get_vert(vertex_buffer, i-0, stride) );
+ /* GL quad strips don't follow provoking vertex convention */
+ if (flatshade_first) {
+ /* emit last quad vertex as first triangle vertex */
+ for (i = 3; i < nr; i += 2) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-0, stride),
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-2, stride) );
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-0, stride),
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-3, stride) );
+ }
+ }
+ else {
+ /* emit last quad vertex as last triangle vertex */
+ for (i = 3; i < nr; i += 2) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-2, stride),
+ get_vert(vertex_buffer, i-0, stride) );
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-0, stride) );
+ }
}
break;
case PIPE_PRIM_POLYGON:
/* Almost same as tri fan but the _first_ vertex specifies the flat
- * shading color. Note that the first polygon vertex is passed as
- * the last triangle vertex here.
- * flatshade_first state makes no difference.
+ * shading color.
*/
- for (i = 2; i < nr; i += 1) {
- setup->triangle( setup,
- get_vert(vertex_buffer, i-1, stride),
- get_vert(vertex_buffer, i-0, stride),
- get_vert(vertex_buffer, 0, stride) );
+ if (flatshade_first) {
+ /* emit first polygon vertex as first triangle vertex */
+ for (i = 2; i < nr; i += 1) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, 0, stride),
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-0, stride) );
+ }
+ }
+ else {
+ /* emit first polygon vertex as last triangle vertex */
+ for (i = 2; i < nr; i += 1) {
+ setup->triangle( setup,
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-0, stride),
+ get_vert(vertex_buffer, 0, stride) );
+ }
}
break;
@@ -463,7 +543,7 @@ lp_setup_init_vbuf(struct lp_setup_context *setup)
setup->base.map_vertices = lp_setup_map_vertices;
setup->base.unmap_vertices = lp_setup_unmap_vertices;
setup->base.set_primitive = lp_setup_set_primitive;
- setup->base.draw = lp_setup_draw;
+ setup->base.draw_elements = lp_setup_draw_elements;
setup->base.draw_arrays = lp_setup_draw_arrays;
setup->base.release_vertices = lp_setup_release_vertices;
setup->base.destroy = lp_setup_vbuf_destroy;
generated by cgit v1.1 at 2025-02-10 05:00:08 +0000