[Bug 95292] [IVB,SKL] vulkan: stride/tiling issue with vkCmdCopyBufferToImage from larger source buffer into destination image

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri May 6 05:53:18 UTC 2016


https://bugs.freedesktop.org/show_bug.cgi?id=95292

            Bug ID: 95292
           Summary: [IVB,SKL] vulkan: stride/tiling issue with
                    vkCmdCopyBufferToImage from larger source buffer into
                    destination image
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Vulkan/intel
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: ystreet00 at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 123518
  --> https://bugs.freedesktop.org/attachment.cgi?id=123518&action=edit
vkCmdCopyBufferToImage failure

When copying from a larger buffer to a smaller image, there is some combination
of stride/tiling mismatches that results in bad output.

The attached screenshot is using a 385x240 BGRA VkBuffer as the source and a
320x240 VkImage (from the swapchain) as the destination.  Using anything <= 384
for the width of the source VkBuffer doesn't exhibit this issue anything
greater than 384 does.  Changing the height of the source VkBuffer has no
effect on the stride mismatch.

Using:
- mesa from git be5010c
- libdrm 2.4.67-2
- Linux kernel 4.5.1-1-ARCH x86_64
- Both Ivy Bridge and Skylake chips
- https://cgit.freedesktop.org/gstreamer/gst-plugins-bad/tree/ext/vulkan

Test application:
gst-launch-1.0 videotestsrc ! video/x-raw,width=385 ! vulkanupload ! vulkansink

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