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Additional semaphore to synchronize offscreen and final render (Refs #70)

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This commit is contained in:
saschawillems 2016-06-05 17:56:53 +02:00
parent c463a2905d
commit 046d0f2c42
1 changed files with 19 additions and 11 deletions
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30
bloom/bloom.cpp
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@ -124,12 +124,16 @@ public:
FrameBufferAttachment color, depth;
// Texture target for framebuffer blit
vkTools::VulkanTexture textureTarget;
VkSampler colorSampler;
} offScreenFrameBuf, offScreenFrameBufB;
// Used to store commands for rendering and blitting
// the offscreen scene
VkCommandBuffer offScreenCmdBuffer = VK_NULL_HANDLE;
// Semaphore used to synchronize between offscreen and final scene rendering
VkSemaphore offscreenSemaphore = VK_NULL_HANDLE;
VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
{
zoom = -10.25f;
@ -192,6 +196,7 @@ public:
vkTools::destroyUniformData(device, &uniformData.fsHorzBlur);
vkFreeCommandBuffers(device, cmdPool, 1, &offScreenCmdBuffer);
vkDestroySemaphore(device, offscreenSemaphore, nullptr);
textureLoader->destroyTexture(textures.cubemap);
}
@ -394,18 +399,22 @@ public:
VulkanExampleBase::flushCommandBuffer(cmdBuffer, queue, true);
}
void createOffscreenCommandBuffer()
{
VkCommandBufferAllocateInfo cmd = vkTools::initializers::commandBufferAllocateInfo(
cmdPool,
VK_COMMAND_BUFFER_LEVEL_PRIMARY,
1);
VK_CHECK_RESULT(vkAllocateCommandBuffers(device, &cmd, &offScreenCmdBuffer));
}
// Render the 3D scene into a texture target
// Sets up the command buffer that renders the scene to the offscreen frame buffer
// The blur method used in this example is multi pass and renders the vertical
// blur first and then the horizontal one.
// While it's possible to blur in one pass, this method is widely used as it
// requires far less samples to generate the blur
void buildOffscreenCommandBuffer()
{
if (offScreenCmdBuffer == VK_NULL_HANDLE)
{
offScreenCmdBuffer = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, false);
}
// Create a semaphore used to synchronize offscreen rendering and usage
VkSemaphoreCreateInfo semaphoreCreateInfo = vkTools::initializers::semaphoreCreateInfo();
VK_CHECK_RESULT(vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &offscreenSemaphore));
VkCommandBufferBeginInfo cmdBufInfo = vkTools::initializers::commandBufferBeginInfo();
// Horizontal blur
@ -1207,7 +1216,6 @@ public:
preparePipelines();
setupDescriptorPool();
setupDescriptorSet();
createOffscreenCommandBuffer();
buildCommandBuffers();
prepared = true;
}