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Merge pull request #681 from krOoze/triangle_dependencies

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Tweak Triangle subpass dependencies
This commit is contained in:
Sascha Willems 2020-04-01 18:15:30 +02:00 • committed by GitHub
commit 78b25ebd71
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 81 additions and 82 deletions
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3
base/vulkanexamplebase.h
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@ -182,8 +182,7 @@ public:
std::string name = "vulkanExample";
uint32_t apiVersion = VK_API_VERSION_1_0;
struct
{
struct {
VkImage image;
VkDeviceMemory mem;
VkImageView view;

22
examples/triangle/triangle.cpp
View file

@ -49,8 +49,7 @@ public:
} vertices;
// Index buffer
struct
{
struct {
VkDeviceMemory memory;
VkBuffer buffer;
uint32_t count;
@ -756,20 +755,21 @@ public:
// Does the transition from final to initial layout
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL; // Producer of the dependency
dependencies[0].dstSubpass = 0; // Consumer is our single subpass that will wait for the execution depdendency
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependencies[0].srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; // Match our pWaitDstStageMask when we vkQueueSubmit
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; // is a loadOp stage for color attachments
dependencies[0].srcAccessMask = 0; // semaphore wait already does memory dependency for us
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT; // is a loadOp CLEAR access mask for color attachments
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
// Second dependency at the end the renderpass
// Does the transition from the initial to the final layout
// Technically this is the same as the implicit subpass dependency, but we are gonna state it explicitly here
dependencies[1].srcSubpass = 0; // Producer of the dependency is our single subpass
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL; // Consumer are all commands outside of the renderpass
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; // is a storeOp stage for color attachments
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT; // Do not block any subsequent work
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT; // is a storeOp `STORE` access mask for color attachments
dependencies[1].dstAccessMask = 0;
dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
// Create the actual renderpass
@ -873,7 +873,7 @@ public:
rasterizationState.lineWidth = 1.0f;
// Color blend state describes how blend factors are calculated (if used)
// We need one blend attachment state per color attachment (even if blending is not used
// We need one blend attachment state per color attachment (even if blending is not used)
VkPipelineColorBlendAttachmentState blendAttachmentState[1] = {};
blendAttachmentState[0].colorWriteMask = 0xf;
blendAttachmentState[0].blendEnable = VK_FALSE;