SSAO.h

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#pragma once
 
#include "../core/GraphicsPipeline.h"
#include "../core/Texture.h"
#include <SDL3/SDL_gpu.h>
 
namespace candlewick {
namespace ssao {
  struct SsaoPass {
    SDL_GPUDevice *_device = nullptr;
    SDL_GPUTexture *inDepthMap = nullptr;
    SDL_GPUTexture *inNormalMap = nullptr;
    SDL_GPUSampler *texSampler = nullptr;
    GraphicsPipeline pipeline{NoInit};
    Texture ssaoMap{NoInit};
    Uint32 kernelSize = 16u;
    struct SsaoNoise {
      Texture tex{NoInit};
      SDL_GPUSampler *sampler = nullptr;
      // The texture will be N x N where N is this value.
      Uint32 pixel_window_size;
    } ssaoNoise;
    GraphicsPipeline blurPipeline{NoInit};
    // first blur pass target
    Texture blurPass1Tex{NoInit};
 
    SsaoPass(NoInitT) {}
    SsaoPass(const RenderContext &renderer, SDL_GPUTexture *inNormalMap,
             SDL_GPUTexture *inDepthTex, Uint32 kernelSize = 16u);
 
    SsaoPass(SsaoPass &&other) noexcept;
    SsaoPass &operator=(SsaoPass &&other) noexcept;
 
    void render(CommandBuffer &cmdBuf, const Camera &camera);
 
    // cleanup function
    void release() noexcept;
 
    ~SsaoPass() noexcept { this->release(); }
  };
 
} // namespace ssao
} // namespace candlewick