/* -*- Mode: C++; tab-width: 4; 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 WEBGL_RENDERBUFFER_H_

#define WEBGL_RENDERBUFFER_H_

#include "mozilla/LinkedList.h"

#include "nsWrapperCache.h"

#include "WebGLFramebufferAttachable.h"

#include "WebGLObjectModel.h"

#include "WebGLStrongTypes.h"

namespace mozilla {

namespace webgl {

struct FormatUsageInfo;

}

class WebGLRenderbuffer final

    : public nsWrapperCache

    , public WebGLRefCountedObject<WebGLRenderbuffer>

    , public LinkedListElement<WebGLRenderbuffer>

    , public WebGLRectangleObject

    , public WebGLFramebufferAttachable

{

    friend class WebGLContext;

    friend class WebGLFramebuffer;

    friend class WebGLFBAttachPoint;

public:

    const GLuint mPrimaryRB;

protected:

    const bool mEmulatePackedDepthStencil;

    GLuint mSecondaryRB;

    const webgl::FormatUsageInfo* mFormat;

    GLsizei mSamples;

    WebGLImageDataStatus mImageDataStatus;

    bool mHasBeenBound;

public:

    NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLRenderbuffer)

    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLRenderbuffer)

    explicit WebGLRenderbuffer(WebGLContext* webgl);

    void Delete();

    bool HasUninitializedImageData() const {

        MOZ_ASSERT(mImageDataStatus != WebGLImageDataStatus::NoImageData);

        return mImageDataStatus == WebGLImageDataStatus::UninitializedImageData;

    }

    bool IsDefined() const {

        if (!mFormat) {

            MOZ_ASSERT(!mWidth && !mHeight);

            return false;

        }

        return true;

    }

    GLsizei Samples() const { return mSamples; }

    const webgl::FormatUsageInfo* Format() const { return mFormat; }

    int64_t MemoryUsage() const;

    WebGLContext* GetParentObject() const {

        return mContext;

    }

    void RenderbufferStorage(uint32_t samples, GLenum internalFormat, uint32_t width,

                             uint32_t height);

    // Only handles a subset of `pname`s.

    GLint GetRenderbufferParameter(RBTarget target, RBParam pname) const;

    virtual JSObject* WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto) override;

protected:

    ~WebGLRenderbuffer() {

        DeleteOnce();

    }

    void DoFramebufferRenderbuffer(FBTarget target, GLenum attachment) const;

    GLenum DoRenderbufferStorage(uint32_t samples, const webgl::FormatUsageInfo* format,

                                 uint32_t width, uint32_t height);

};

} // namespace mozilla

#endif // WEBGL_RENDERBUFFER_H_