diff options
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/r300/r300_render.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c index d5ba4fab499..830b0d9d875 100644 --- a/src/gallium/drivers/r300/r300_render.c +++ b/src/gallium/drivers/r300/r300_render.c @@ -740,6 +740,55 @@ static void r300_draw_elements_instanced(struct r300_context *r300, r300_draw_elements(r300, info, i); } +static unsigned r300_max_vertex_count(struct r300_context *r300) +{ + unsigned i, nr = r300->velems->count; + struct pipe_vertex_element *velems = r300->velems->velem; + unsigned result = ~0; + + for (i = 0; i < nr; i++) { + struct pipe_vertex_buffer *vb = + &r300->vertex_buffer[velems[i].vertex_buffer_index]; + unsigned size, max_count, value; + + /* We're not interested in constant and per-instance attribs. */ + if (!vb->buffer || + !vb->stride || + velems[i].instance_divisor) { + continue; + } + + size = vb->buffer->width0; + + /* Subtract buffer_offset. */ + value = vb->buffer_offset; + if (value >= size) { + return 0; + } + size -= value; + + /* Subtract src_offset. */ + value = velems[i].src_offset; + if (value >= size) { + return 0; + } + size -= value; + + /* Subtract format_size. */ + value = r300->velems->format_size[i]; + if (value >= size) { + return 0; + } + size -= value; + + /* Compute the max count. */ + max_count = 1 + size / vb->stride; + result = MIN2(result, max_count); + } + return result; +} + + static void r300_draw_vbo(struct pipe_context* pipe, const struct pipe_draw_info *dinfo) { @@ -757,7 +806,7 @@ static void r300_draw_vbo(struct pipe_context* pipe, /* Draw. */ if (info.indexed) { - unsigned max_count = u_vbuf_draw_max_vertex_count(r300->vbuf_mgr); + unsigned max_count = r300_max_vertex_count(r300); if (!max_count) { fprintf(stderr, "r300: Skipping a draw command. There is a buffer " |