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authorJosé Fonseca <[email protected]>2011-04-06 14:38:26 +0100
committerJosé Fonseca <[email protected]>2011-04-07 12:20:06 +0100
commitaa61b1535187129c61dd772471f23c633971665d (patch)
treefd0c840f06564ef32791ee8f143f02fb71540ea1 /src/mesa
parent66b66295d0bc856c69fdcccc22575580c7ecee16 (diff)
mesa/st: Handle feedback draw when VBO offsets are not sorted in ascending order.
Simply port the same logic from setup_interleaved_attribs(). Avoids overflow in mustpass.c and feedback.c conform tests.
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/state_tracker/st_draw_feedback.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/src/mesa/state_tracker/st_draw_feedback.c b/src/mesa/state_tracker/st_draw_feedback.c
index 1e1220bfe52..96a08b39100 100644
--- a/src/mesa/state_tracker/st_draw_feedback.c
+++ b/src/mesa/state_tracker/st_draw_feedback.c
@@ -111,6 +111,7 @@ st_feedback_draw_vbo(struct gl_context *ctx,
struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
struct pipe_transfer *ib_transfer = NULL;
GLuint attr, i;
+ const GLubyte *low_addr = NULL;
const void *mapped_indices = NULL;
assert(draw);
@@ -141,6 +142,16 @@ st_feedback_draw_vbo(struct gl_context *ctx,
draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
set_feedback_vertex_format(ctx);
+ /* Find the lowest address of the arrays we're drawing */
+ if (vp->num_inputs) {
+ low_addr = arrays[vp->index_to_input[0]]->Ptr;
+
+ for (attr = 1; attr < vp->num_inputs; attr++) {
+ const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
+ low_addr = MIN2(low_addr, start);
+ }
+ }
+
/* loop over TGSI shader inputs to determine vertex buffer
* and attribute info
*/
@@ -159,8 +170,8 @@ st_feedback_draw_vbo(struct gl_context *ctx,
vbuffers[attr].buffer = NULL;
pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
- vbuffers[attr].buffer_offset = pointer_to_offset(arrays[0]->Ptr);
- velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
+ vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
+ velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;
}
else {
/* attribute data is in user-space memory, not a VBO */