Method FillWithDiscardPatternOnHost

renderdoc/driver/vulkan/vk_debug.cpp:2635–2707

}

void VulkanDebugManager::FillWithDiscardPatternOnHost(VkDevice device, DiscardType type,
                                                      VkImage image, VkImageLayout curLayout,
                                                      VkImageSubresourceRange discardRange,
                                                      VkRect2D discardRect)
{
  // State tracking will not be accurate during loading
  if(IsLoading(m_pDriver->m_State))
    return;

  const VulkanCreationInfo::Image &imInfo = GetImageInfo(GetResID(image));
  const VkImageAspectFlags aspectFlags = discardRange.aspectMask & FormatImageAspects(imInfo.format);

  // Not supported for multisampled images.
  if(imInfo.samples > 1)
  {
    RDCWARN("Skipping discard pattern for MSAA image as host copy is unimplemented");
    return;
  }

  VkFormat format = imInfo.format;
  if(format == VK_FORMAT_X8_D24_UNORM_PACK32)
    format = VK_FORMAT_D24_UNORM_S8_UINT;
  if(format == VK_FORMAT_S8_UINT)
    format = VK_FORMAT_D32_SFLOAT_S8_UINT;

  BlockShape shape = GetBlockShape(format, 0);
  if((DiscardPatternWidth % shape.width) != 0 || (DiscardPatternHeight % shape.height) != 0)
  {
    RDCWARN("Skipping discard pattern for %s as block size is incompatible (%d * %d)",
            ToStr(MakeResourceFormat(format).type).c_str(), shape.width, shape.height);
    return;
  }

  bytebuf pattern = GetDiscardPattern(type, MakeResourceFormat(format));

  rdcarray<VkBufferImageCopy> mainCopies, stencilCopies;
  GetDiscardPatternCopyRegions(imInfo, aspectFlags, discardRange, discardRect, DiscardPatternWidth,
                               DiscardPatternHeight, mainCopies, stencilCopies);

  VkMemoryToImageCopy hostCopy = {
      VK_STRUCTURE_TYPE_MEMORY_TO_IMAGE_COPY, NULL, pattern.data(),
      // The rest of the parameters are copied from `mainCopies` and `stencilCopies`.
  };

  VkCopyMemoryToImageInfo info = {
      VK_STRUCTURE_TYPE_COPY_MEMORY_TO_IMAGE_INFO, NULL, 0, Unwrap(image), curLayout, 1, &hostCopy,
  };

  for(const VkBufferImageCopy &copy : mainCopies)
  {
    hostCopy.memoryRowLength = copy.bufferRowLength;
    hostCopy.memoryImageHeight = copy.bufferImageHeight;
    hostCopy.imageSubresource = copy.imageSubresource;
    hostCopy.imageOffset = copy.imageOffset;
    hostCopy.imageExtent = copy.imageExtent;

    ObjDisp(device)->CopyMemoryToImage(Unwrap(device), &info);
  }