src/dawn/native/opengl/ContextEGL.h

// Copyright 2022 The Dawn & Tint Authors
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#ifndef SRC_DAWN_NATIVE_OPENGL_CONTEXTEGL_H_
#define SRC_DAWN_NATIVE_OPENGL_CONTEXTEGL_H_

#include <memory>
#include <utility>

#include "dawn/common/NonMovable.h"
#include "dawn/common/egl_platform.h"
#include "dawn/native/opengl/DeviceGL.h"
#include "dawn/native/opengl/EGLFunctions.h"
#include "partition_alloc/pointers/raw_ptr.h"

namespace dawn::native::opengl {

class DisplayEGL;

class ContextEGL : NonMovable {
  public:
    static ResultOrError<std::unique_ptr<ContextEGL>> Create(const DisplayEGL* display,
                                                             wgpu::BackendType backend,
                                                             bool useRobustness,
                                                             bool useANGLETextureSharing);

    explicit ContextEGL(const DisplayEGL* display);
    ~ContextEGL();

    MaybeError Initialize(wgpu::BackendType backend,
                          bool useRobustness,
                          bool useANGLETextureSharing);

    // Make the surface used by all MakeCurrent until the scoper gets out of scope.
    class ScopedMakeSurfaceCurrent : NonMovable {
      public:
        ScopedMakeSurfaceCurrent(ContextEGL* context, EGLSurface surface);
        ~ScopedMakeSurfaceCurrent();

      private:
        raw_ptr<ContextEGL> mContext;
    };
    [[nodiscard]] ScopedMakeSurfaceCurrent MakeSurfaceCurrentScope(EGLSurface surface);

    void MakeCurrent();

  private:
    raw_ptr<const DisplayEGL> mDisplay;
    EGLContext mContext = EGL_NO_CONTEXT;
    EGLSurface mCurrentSurface = EGL_NO_SURFACE;
    EGLSurface mOffscreenSurface = EGL_NO_SURFACE;
};

}  // namespace dawn::native::opengl

#endif  // SRC_DAWN_NATIVE_OPENGL_CONTEXTEGL_H_