src/dawn/native/RenderPassWorkaroundsHelper.h

// Copyright 2024 The Dawn & Tint Authors
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#ifndef SRC_DAWN_NATIVE_RENDERPASSWORKAROUNDSHELPER_H_
#define SRC_DAWN_NATIVE_RENDERPASSWORKAROUNDSHELPER_H_

#include <functional>

#include "dawn/common/NonMovable.h"
#include "dawn/common/Ref.h"
#include "dawn/common/ityp_array.h"
#include "dawn/common/ityp_bitset.h"
#include "dawn/native/Error.h"
#include "dawn/native/IntegerTypes.h"

namespace dawn::native {
struct BeginRenderPassCmd;
class CommandEncoder;
class RenderPassEncoder;
struct RenderPassDescriptor;
class RenderPassResourceUsageTracker;
class TextureBase;
class TextureViewBase;

// This class does several render pass' workarounds at various steps:
// - When post processing encoded BeginRenderPassCmd.
// - After render pass starts.
class RenderPassWorkaroundsHelper : NonMovable {
  public:
    RenderPassWorkaroundsHelper();
    ~RenderPassWorkaroundsHelper();

    MaybeError Initialize(CommandEncoder* encoder,
                          const RenderPassDescriptor* renderPassDescriptor);
    MaybeError ApplyOnPostEncoding(CommandEncoder* encoder,
                                   RenderPassResourceUsageTracker* usageTracker,
                                   BeginRenderPassCmd* cmd,
                                   std::function<void()>* passEndCallbackOut);

    MaybeError ApplyOnRenderPassStart(RenderPassEncoder* rpEncoder,
                                      const RenderPassDescriptor* rpDesc);

  private:
    struct TextureAndView {
        Ref<TextureBase> texture;
        Ref<TextureViewBase> view;
    };
    // Temporary resolve targets to replace the original resolve targets.
    PerColorAttachment<TextureAndView> mTempResolveTargets;
    ColorAttachmentMask mTempResolveTargetsMask;

    // Should we apply ExpandResolveTexture step?
    bool mShouldApplyExpandResolveEmulation = false;
};

}  // namespace dawn::native

#endif