Module: Mesa
Branch: master
Commit: 2d3223ca90ae946231c1bfbfd1b450e5e96106a3
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=2d3223ca90ae946231c1bfbfd1b450e5e96106a3

Author: Samuel Pitoiset <[email protected]>
Date:   Wed Mar 18 18:49:23 2020 +0100

radv: fix optional pSizes parameter when binding streamout buffers

The Vulkan spec 1.2.135 says:

   "pSizes is an optional array of buffer sizes, specifying the maximum
   number of bytes to capture to the corresponding transform feedback
   buffer. If pSizes is NULL, or the value of the pSizes array element
   is VK_WHOLE_SIZE, then the maximum bytes captured will be the size
   of the corresponding buffer minus the buffer offset."

Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/2650
Fixes: b4eb029062a ("radv: implement VK_EXT_transform_feedback")
Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>
Tested-by: Marge Bot 
<https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4232>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4232>

---

 src/amd/vulkan/radv_cmd_buffer.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index b58b3541c80..81b705893f7 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -6026,7 +6026,12 @@ void radv_CmdBindTransformFeedbackBuffersEXT(
 
                sb[idx].buffer = radv_buffer_from_handle(pBuffers[i]);
                sb[idx].offset = pOffsets[i];
-               sb[idx].size = pSizes[i];
+
+               if (!pSizes || pSizes[i] == VK_WHOLE_SIZE) {
+                       sb[idx].size = sb[idx].buffer->size - sb[idx].offset;
+               } else {
+                       sb[idx].size = pSizes[i];
+               }
 
                radv_cs_add_buffer(cmd_buffer->device->ws, cmd_buffer->cs,
                                   sb[idx].buffer->bo);

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