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svga: fix incorrect user buffer size computation

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Viewperf uses some unusual vertex arrays where the stride is less
than the element size.  In this case, the stride was 4 while the
element size was 12.  The difference of 8 bytes causes us to miss
uploading the tail bit of the array data.

Typically the stride is >= the element size so there was no problem
with other apps.
This commit is contained in:
Brian Paul 2011-06-15 16:41:13 -06:00 • committed by Thomas Hellstrom
parent bd00fb2c06
commit fa4bd30212
1 changed files with 3 additions and 1 deletions
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4
src/gallium/drivers/svga/svga_pipe_draw.c
View file

@ -25,6 +25,7 @@
#include "svga_cmd.h"
#include "util/u_format.h"
#include "util/u_inlines.h"
#include "util/u_prim.h"
#include "util/u_time.h"
@ -75,8 +76,9 @@ svga_upload_user_buffers(struct svga_context *svga,
size = vb->stride *
(instance_count + instance_div - 1) / instance_div;
} else if (vb->stride) {
uint elemSize = util_format_get_blocksize(ve->src_format);
first = vb->stride * start;
size = vb->stride * count;
size = vb->stride * (count - 1) + elemSize;
} else {
/* Only a single vertex!
* Upload with the largest vertex size the hw supports,