From: Chia-I Wu <o...@lunarg.com>
u_vbuf_upload_buffers modifies the buffer offsets. If they are not
restored, and any of the vertex formats is not supported natively, the
next u_vbuf_mgr_draw_begin call will translate the vertex buffers with
incorrect buffer offsets.
---
src/gallium/auxiliary/util/u_vbuf_mgr.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_vbuf_mgr.c
b/src/gallium/auxiliary/util/u_vbuf_mgr.c
index 374fc33..47e7027 100644
--- a/src/gallium/auxiliary/util/u_vbuf_mgr.c
+++ b/src/gallium/auxiliary/util/u_vbuf_mgr.c
@@ -79,6 +79,8 @@ struct u_vbuf_mgr_priv {
void *saved_ve, *fallback_ve;
boolean ve_binding_lock;
+ unsigned saved_buffer_offset[PIPE_MAX_ATTRIBS];
+
boolean any_user_vbs;
boolean incompatible_vb_layout;
};
@@ -488,6 +490,7 @@ void u_vbuf_mgr_set_vertex_buffers(struct u_vbuf_mgr *mgrb,
pipe_resource_reference(&mgr->b.vertex_buffer[i].buffer, vb->buffer);
pipe_resource_reference(&mgr->b.real_vertex_buffer[i], NULL);
+ mgr->saved_buffer_offset[i] = vb->buffer_offset;
if (!vb->buffer) {
continue;
@@ -647,6 +650,17 @@ u_vbuf_mgr_draw_begin(struct u_vbuf_mgr *mgrb,
void u_vbuf_mgr_draw_end(struct u_vbuf_mgr *mgrb)
{
struct u_vbuf_mgr_priv *mgr = (struct u_vbuf_mgr_priv*)mgrb;
+ unsigned i;
+
+ /* buffer offsets were modified in u_vbuf_upload_buffers */
+ if (mgr->any_user_vbs) {
+ for (i = 0; i < mgr->ve->count; i++) {
+ unsigned index = mgr->ve->ve[i].vertex_buffer_index;
+ struct pipe_vertex_buffer *vb = &mgr->b.vertex_buffer[index];
+
+ vb->buffer_offset = mgr->saved_buffer_offset[index];
+ }
+ }
if (mgr->fallback_ve) {
u_vbuf_translate_end(mgr);
--
1.7.5.3
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