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Resolve WRITE_AFTER_WRITE hazard in extensions sample conservative_rasterization. #1536

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Resolve WRITE_AFTER_WRITE hazard in extensions sample conservative_rasterization. #1536

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6 changes: 4 additions & 2 deletions samples/extensions/conservative_rasterization/conservative_rasterization.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -195,12 +195,14 @@ void ConservativeRasterization::prepare_offscreen()
// Use subpass dependencies for layout transitions
std::array<VkSubpassDependency, 2> dependencies;

// For attachment 0 (color), we need to allow VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT access at VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT
// For attachment 1 (depth), we need to allow VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT access at VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
dependencies[0].dstSubpass = 0;
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT | VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT;
dependencies[0].srcAccessMask = VK_ACCESS_SHADER_READ_BIT;
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;

dependencies[1].srcSubpass = 0;
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