RenderPassCache.h

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#pragma once
 
#include "Image.h"
#include "VulkanConstants.h"
#include <vector>
#include <unordered_map>
 
struct RenderPassConfig
{
    // Config
    VkFormat mDepthFormat = VK_FORMAT_UNDEFINED;
    VkFormat mColorFormats[MAX_RENDER_TARGETS] = {};
    VkAttachmentLoadOp mLoadOp = VK_ATTACHMENT_LOAD_OP_LOAD;
    VkAttachmentStoreOp mStoreOp = VK_ATTACHMENT_STORE_OP_STORE;
    VkAttachmentLoadOp mDepthLoadOp = VK_ATTACHMENT_LOAD_OP_LOAD;
    VkAttachmentStoreOp mDepthStoreOp = VK_ATTACHMENT_STORE_OP_STORE;
    VkImageLayout mPreLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
    VkImageLayout mPostLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
 
    // Debug
    const char* mDebugName = "";
 
    bool operator==(const RenderPassConfig& other) const;
    size_t Hash() const;
};
 
struct FramebufferConfig
{
    // Config
    Image* mDepthImage = nullptr;
    Image* mColorImages[MAX_RENDER_TARGETS] = {};
    VkRenderPass mRenderPass;
 
    // Debug
    const char* mDebugName = "";
 
    bool operator==(const FramebufferConfig& other) const;
    size_t Hash() const;
 
};
 
struct RenderPassHash
{
    size_t operator()(const RenderPassConfig& config) const
    {
        return config.Hash();
    }
};
 
struct FramebufferHash
{
    size_t operator()(const FramebufferConfig& config) const
    {
        return config.Hash();
    }
};
 
class RenderPassCache
{
public:
 
    void Create();
    void Destroy();
    void Clear(bool framebuffersOnly);
 
    VkRenderPass ResolveRenderPass(const RenderPassConfig& config);
    VkFramebuffer ResolveFramebuffer(const FramebufferConfig& config);
 
protected:
 
    std::unordered_map<RenderPassConfig, VkRenderPass, RenderPassHash> mRenderPassMap;
    std::unordered_map<FramebufferConfig, VkFramebuffer, FramebufferHash> mFramebufferMap;
 
};