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Optimize Vulkan Framebuffer when not using color blending

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This commit is contained in:
Wojtek Figat
2021-05-18 11:56:21 +02:00
parent 7f6a6f9fff
commit ead65f01ff
5 changed files with 7 additions and 4 deletions
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1
Source/Engine/GraphicsDevice/Vulkan/GPUContextVulkan.cpp
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@@ -338,6 +338,7 @@ void GPUContextVulkan::BeginRenderPass()
framebufferKey.AttachmentCount = _rtCount;
RenderTargetLayoutVulkan layout;
layout.RTsCount = _rtCount;
layout.BlendEnable = _currentState && _currentState->BlendEnable;
layout.DepthFormat = _rtDepth ? _rtDepth->GetFormat() : PixelFormat::Unknown;
for (int32 i = 0; i < GPU_MAX_RT_BINDED; i++)
{

4
Source/Engine/GraphicsDevice/Vulkan/GPUDeviceVulkan.cpp
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@@ -427,6 +427,7 @@ uint32 GetHash(const RenderTargetLayoutVulkan& key)
uint32 hash = (int32)key.MSAA * 11;
CombineHash(hash, (uint32)key.ReadDepth);
CombineHash(hash, (uint32)key.WriteDepth);
CombineHash(hash, (uint32)key.BlendEnable);
CombineHash(hash, (uint32)key.DepthFormat * 93473262);
CombineHash(hash, key.RTsCount * 136);
CombineHash(hash, key.Extent.width);
@@ -505,8 +506,7 @@ RenderPassVulkan::RenderPassVulkan(GPUDeviceVulkan* device, const RenderTargetLa
attachment.flags = 0;
attachment.format = RenderToolsVulkan::ToVulkanFormat(layout.RTVsFormats[i]);
attachment.samples = (VkSampleCountFlagBits)layout.MSAA;
//attachment.loadOp = currentBlendDesc->BlendEnable ? VK_ATTACHMENT_LOAD_OP_LOAD : VK_ATTACHMENT_LOAD_OP_DONT_CARE; // TODO: Only if any destination blend?
attachment.loadOp = VK_ATTACHMENT_LOAD_OP_LOAD; // TODO: only load when using blend mode
attachment.loadOp = layout.BlendEnable ? VK_ATTACHMENT_LOAD_OP_LOAD : VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
attachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;

1
Source/Engine/GraphicsDevice/Vulkan/GPUDeviceVulkan.h
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@@ -235,6 +235,7 @@ public:
MSAALevel MSAA;
bool ReadDepth;
bool WriteDepth;
bool BlendEnable;
PixelFormat DepthFormat;
PixelFormat RTVsFormats[GPU_MAX_RT_BINDED];
VkExtent2D Extent;

3
Source/Engine/GraphicsDevice/Vulkan/GPUPipelineStateVulkan.cpp
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@@ -308,6 +308,7 @@ bool GPUPipelineStateVulkan::Init(const Description& desc)
_desc.pRasterizationState = &_descRasterization;
// Color Blend State
BlendEnable = desc.BlendMode.BlendEnable;
RenderToolsVulkan::ZeroStruct(_descColorBlend, VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO);
{
auto& blend = _descColorBlendAttachments[0];
@@ -321,9 +322,7 @@ bool GPUPipelineStateVulkan::Init(const Description& desc)
blend.colorWriteMask = (VkColorComponentFlags)desc.BlendMode.RenderTargetWriteMask;
}
for (int32 i = 1; i < GPU_MAX_RT_BINDED; i++)
{
_descColorBlendAttachments[i] = _descColorBlendAttachments[i - 1];
}
_descColorBlend.pAttachments = _descColorBlendAttachments;
_descColorBlend.blendConstants[0] = 0.0f;
_descColorBlend.blendConstants[1] = 0.0f;

2
Source/Engine/GraphicsDevice/Vulkan/GPUPipelineStateVulkan.h
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@@ -135,6 +135,8 @@ public:
/// </summary>
uint32 UsedStagesMask;
bool BlendEnable;
/// <summary>
/// The bitmask of stages that have descriptors.
/// </summary>