[Mesa-dev] [PATCH] st/mesa: fix crash when using both user and vbo buffers with the same stride
Marek Olšák
maraeo at gmail.com
Sun Feb 20 09:14:24 PST 2011
If two buffers had the same stride where one buffer is a user one and
the other is a vbo, it was considered to be one interleaved buffer,
resulting in incorrect rendering and crashes.
This patch makes sure that the interleaved buffer is either user or vbo,
not both.
---
src/mesa/state_tracker/st_draw.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index 5475e87..11ebd06 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -249,6 +249,7 @@ is_interleaved_arrays(const struct st_vertex_program *vp,
const struct gl_buffer_object *firstBufObj = NULL;
GLint firstStride = -1;
const GLubyte *client_addr = NULL;
+ GLboolean user_memory;
for (attr = 0; attr < vpv->num_inputs; attr++) {
const GLuint mesaAttr = vp->index_to_input[attr];
@@ -257,6 +258,7 @@ is_interleaved_arrays(const struct st_vertex_program *vp,
if (firstStride < 0) {
firstStride = stride;
+ user_memory = !bufObj || !bufObj->Name;
}
else if (firstStride != stride) {
return GL_FALSE;
@@ -266,6 +268,9 @@ is_interleaved_arrays(const struct st_vertex_program *vp,
/* Try to detect if the client-space arrays are
* "close" to each other.
*/
+ if (!user_memory) {
+ return GL_FALSE;
+ }
if (!client_addr) {
client_addr = arrays[mesaAttr]->Ptr;
}
@@ -275,6 +280,9 @@ is_interleaved_arrays(const struct st_vertex_program *vp,
}
}
else if (!firstBufObj) {
+ if (user_memory) {
+ return GL_FALSE;
+ }
firstBufObj = bufObj;
}
else if (bufObj != firstBufObj) {
--
1.7.1
More information about the mesa-dev
mailing list