/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef TEXTUREIMAGEEGL_H_
#define TEXTUREIMAGEEGL_H_

#include "GLTextureImage.h"

namespace mozilla {
namespace gl {

class TextureImageEGL final
    : public TextureImage
{
public:
    TextureImageEGL(GLuint aTexture,
                    const gfx::IntSize& aSize,
                    GLenum aWrapMode,
                    ContentType aContentType,
                    GLContext* aContext,
                    Flags aFlags = TextureImage::NoFlags,
                    TextureState aTextureState = Created,
                    TextureImage::ImageFormat aImageFormat = SurfaceFormat::UNKNOWN);

    virtual ~TextureImageEGL();

    virtual void GetUpdateRegion(nsIntRegion& aForRegion);

    virtual gfx::DrawTarget* BeginUpdate(nsIntRegion& aRegion);

    virtual void EndUpdate();

    virtual bool DirectUpdate(gfx::DataSourceSurface* aSurf, const nsIntRegion& aRegion, const gfx::IntPoint& aFrom = gfx::IntPoint(0,0));

    virtual void BindTexture(GLenum aTextureUnit);

    virtual GLuint GetTextureID()
    {
        // Ensure the texture is allocated before it is used.
        if (mTextureState == Created) {
            Resize(mSize);
        }
        return mTexture;
    };

    virtual bool InUpdate() const { return !!mUpdateDrawTarget; }

    virtual void Resize(const gfx::IntSize& aSize);

    bool BindTexImage();

    bool ReleaseTexImage();

    virtual bool CreateEGLSurface(gfxASurface* aSurface)
    {
        return false;
    }

    virtual void DestroyEGLSurface(void);

protected:
    typedef gfxImageFormat ImageFormat;

    GLContext* mGLContext;

    gfx::IntRect mUpdateRect;
    gfx::SurfaceFormat mUpdateFormat;
    RefPtr<gfx::DrawTarget> mUpdateDrawTarget;
    EGLImage mEGLImage;
    GLuint mTexture;
    EGLSurface mSurface;
    EGLConfig mConfig;
    TextureState mTextureState;

    bool mBound;
};

already_AddRefed<TextureImage>
CreateTextureImageEGL(GLContext* gl,
                      const gfx::IntSize& aSize,
                      TextureImage::ContentType aContentType,
                      GLenum aWrapMode,
                      TextureImage::Flags aFlags,
                      TextureImage::ImageFormat aImageFormat);

already_AddRefed<TextureImage>
TileGenFuncEGL(GLContext* gl,
               const gfx::IntSize& aSize,
               TextureImage::ContentType aContentType,
               TextureImage::Flags aFlags,
               TextureImage::ImageFormat aImageFormat);

} // namespace gl
} // namespace mozilla

#endif // TEXTUREIMAGEEGL_H_