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Add subpass sync support for layout transitions

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Add additional source and dest mask bits for "from external" and "to
external" subpass dependencies (respectively) when intial and final
layouts cause implicit layout transitions.

This is a big hammer -- any transition in a given direction will create
a full barrier.  Attachment specific stage and access flags could be
used instead with additional logic to deduce the prior and intended
subsequent usages.
This commit is contained in:
John Zulauf 2020-10-16 18:34:06 -06:00
parent 5191a8e9db
commit 459fa078e0
1 changed files with 12 additions and 0 deletions
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12
drivers/vulkan/rendering_device_vulkan.cpp
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@ -3218,6 +3218,18 @@ VkRenderPass RenderingDeviceVulkan::_render_pass_create(const Vector<AttachmentF
} else {
ERR_FAIL_V_MSG(VK_NULL_HANDLE, "Texture index " + itos(i) + " is neither color, depth stencil or resolve so it can't be used as attachment.");
}
// NOTE: Big Mallet Approach -- any layout transition causes a full barrier
if (reference.layout != description.initialLayout) {
// NOTE: this should be smarter based on the textures knowledge of it's previous role
dependency_from_external.srcStageMask |= VK_PIPELINE_STAGE_ALL_COMMANDS_BIT;
dependency_from_external.srcAccessMask |= VK_ACCESS_MEMORY_READ_BIT | VK_ACCESS_MEMORY_WRITE_BIT;
}
if (reference.layout != description.finalLayout) {
// NOTE: this should be smarter based on the textures knowledge of it's subsequent role
dependency_from_external.dstStageMask |= VK_PIPELINE_STAGE_ALL_COMMANDS_BIT;
dependency_from_external.dstAccessMask |= VK_ACCESS_MEMORY_READ_BIT | VK_ACCESS_MEMORY_WRITE_BIT;
}
}
ERR_FAIL_COND_V_MSG(depth_stencil_references.size() > 1, VK_NULL_HANDLE,