src/dawn/native/opengl/TextureGL.h

// Copyright 2017 The Dawn & Tint Authors
//
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#ifndef SRC_DAWN_NATIVE_OPENGL_TEXTUREGL_H_
#define SRC_DAWN_NATIVE_OPENGL_TEXTUREGL_H_

#include "dawn/native/Texture.h"

#include "dawn/native/opengl/opengl_platform.h"

namespace dawn::native::opengl {

class Device;
struct GLFormat;

class Texture final : public TextureBase {
  public:
    static ResultOrError<Ref<Texture>> Create(Device* device,
                                              const UnpackedPtr<TextureDescriptor>& descriptor);
    Texture(Device* device, const UnpackedPtr<TextureDescriptor>& descriptor, GLuint handle);

    GLuint GetHandle() const;
    GLenum GetGLTarget() const;
    const GLFormat& GetGLFormat() const;
    uint32_t GetGenID() const;
    void Touch();

    MaybeError EnsureSubresourceContentInitialized(const SubresourceRange& range);

  private:
    Texture(Device* device, const UnpackedPtr<TextureDescriptor>& descriptor);
    ~Texture() override;

    void DestroyImpl() override;
    MaybeError ClearTexture(const SubresourceRange& range, TextureBase::ClearValue clearValue);

    GLuint mHandle;
    bool mOwnsHandle = false;
    GLenum mTarget;
    uint32_t mGenID = 0;
};

class TextureView final : public TextureViewBase {
  public:
    TextureView(TextureBase* texture, const UnpackedPtr<TextureViewDescriptor>& descriptor);

    GLuint GetHandle() const;
    GLenum GetGLTarget() const;
    void BindToFramebuffer(GLenum target, GLenum attachment, GLuint depthLayer = 0);
    void CopyIfNeeded();

  private:
    ~TextureView() override;
    void DestroyImpl() override;
    GLenum GetInternalFormat() const;

    // TODO(crbug.com/dawn/1355): Delete this handle on texture destroy.
    GLuint mHandle;
    GLenum mTarget;
    bool mOwnsHandle;
    bool mUseCopy = false;
    uint32_t mGenID = 0;
};

}  // namespace dawn::native::opengl

#endif  // SRC_DAWN_NATIVE_OPENGL_TEXTUREGL_H_