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u_vbuf: take start_instance into account when uploading instanced attribs

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This commit is contained in:
Marek Olšák 2012-01-01 19:11:25 +01:00
parent f94d390213
commit dbd60d27e8
1 changed files with 4 additions and 2 deletions
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6
src/gallium/auxiliary/util/u_vbuf.c
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@ -539,7 +539,7 @@ void u_vbuf_set_index_buffer(struct u_vbuf *mgr,
static void
u_vbuf_upload_buffers(struct u_vbuf_priv *mgr,
int min_index, int max_index,
unsigned instance_count)
unsigned start_instance, unsigned instance_count)
{
unsigned i;
unsigned count = max_index + 1 - min_index;
@ -577,6 +577,7 @@ u_vbuf_upload_buffers(struct u_vbuf_priv *mgr,
} else if (instance_div) {
/* Per-instance attrib. */
unsigned count = (instance_count + instance_div - 1) / instance_div;
first += vb->stride * start_instance;
size = vb->stride * (count - 1) + mgr->ve->src_format_size[i];
} else {
/* Per-vertex attrib. */
@ -838,7 +839,8 @@ u_vbuf_draw_begin(struct u_vbuf *mgrb,
/* Upload user buffers. */
if (mgr->any_user_vbs) {
u_vbuf_upload_buffers(mgr, min_index, max_index, info->instance_count);
u_vbuf_upload_buffers(mgr, min_index, max_index,
info->start_instance, info->instance_count);
}
return U_VBUF_BUFFERS_UPDATED;
}