Add support for programmable samplers in shaders

Source/Engine/GraphicsDevice/Vulkan/GPUSamplerVulkan.cpp

@@ -0,0 +1,56 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#if GRAPHICS_API_VULKAN
+
+#include "GPUSamplerVulkan.h"
+#include "RenderToolsVulkan.h"
+
+bool GPUSamplerVulkan::OnInit()
+{
+    VkSamplerCreateInfo createInfo;
+    RenderToolsVulkan::ZeroStruct(createInfo, VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO);
+    createInfo.magFilter = RenderToolsVulkan::ToVulkanMagFilterMode(_desc.Filter);
+    createInfo.minFilter = RenderToolsVulkan::ToVulkanMinFilterMode(_desc.Filter);
+    createInfo.mipmapMode = RenderToolsVulkan::ToVulkanMipFilterMode(_desc.Filter);
+    const bool supportsMirrorClampToEdge = GPUDeviceVulkan::OptionalDeviceExtensions.HasMirrorClampToEdge;
+    createInfo.addressModeU = RenderToolsVulkan::ToVulkanWrapMode(_desc.AddressU, supportsMirrorClampToEdge);
+    createInfo.addressModeV = RenderToolsVulkan::ToVulkanWrapMode(_desc.AddressV, supportsMirrorClampToEdge);
+    createInfo.addressModeW = RenderToolsVulkan::ToVulkanWrapMode(_desc.AddressW, supportsMirrorClampToEdge);
+    createInfo.mipLodBias = _desc.MipBias;
+    createInfo.anisotropyEnable = _desc.Filter == GPUSamplerFilter::Anisotropic ? VK_TRUE : VK_FALSE;
+    createInfo.maxAnisotropy = (float)_desc.MaxAnisotropy;
+    createInfo.compareEnable = _desc.ComparisonFunction != GPUSamplerCompareFunction::Never ? VK_TRUE : VK_FALSE;
+    createInfo.compareOp = RenderToolsVulkan::ToVulkanSamplerCompareFunction(_desc.ComparisonFunction);
+    createInfo.minLod = _desc.MinMipLevel;
+    createInfo.maxLod = _desc.MaxMipLevel;
+    switch (_desc.BorderColor)
+    {
+    case GPUSamplerBorderColor::TransparentBlack:
+        createInfo.borderColor = VK_BORDER_COLOR_FLOAT_TRANSPARENT_BLACK;
+        break;
+    case GPUSamplerBorderColor::OpaqueBlack:
+        createInfo.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_BLACK;
+        break;
+    case GPUSamplerBorderColor::OpaqueWhite:
+        createInfo.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
+        break;
+    default:
+        return true;
+    }
+    VALIDATE_VULKAN_RESULT(vkCreateSampler(_device->Device, &createInfo, nullptr, &Sampler));
+    return false;
+}
+
+void GPUSamplerVulkan::OnReleaseGPU()
+{
+    if (Sampler != VK_NULL_HANDLE)
+    {
+        _device->DeferredDeletionQueue.EnqueueResource(DeferredDeletionQueueVulkan::Buffer, Sampler);
+        Sampler = VK_NULL_HANDLE;
+    }
+
+    // Base
+    GPUSampler::OnReleaseGPU();
+}
+
+#endif