RPRendererOpenGL.h

/*
 *  Copyright (C) 2017-2018 Team Kodi
 *  This file is part of Kodi - https://kodi.tv
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *  See LICENSES/README.md for more information.
 */

#pragma once

#include "RPBaseRenderer.h"
#include "cores/RetroPlayer/process/RPProcessInfo.h"
#include "guilib/TextureGL.h"

#include <map>
#include <memory>

#include "system_gl.h"

namespace KODI
{
namespace RETRO
{
class CRenderContext;
class CRenderBufferOpenGL;

class CRendererFactoryOpenGL : public IRendererFactory
{
public:
  ~CRendererFactoryOpenGL() override = default;

  // implementation of IRendererFactory
  std::string RenderSystemName() const override;
  CRPBaseRenderer* CreateRenderer(const CRenderSettings& settings,
                                  CRenderContext& context,
                                  std::shared_ptr<IRenderBufferPool> bufferPool) override;
  RenderBufferPoolVector CreateBufferPools(CRenderContext& context) override;
};

class CRPRendererOpenGL : public CRPBaseRenderer
{
public:
  CRPRendererOpenGL(const CRenderSettings& renderSettings,
                    CRenderContext& context,
                    std::shared_ptr<IRenderBufferPool> bufferPool);
  ~CRPRendererOpenGL() override;

  // implementation of CRPBaseRenderer
  bool Supports(RENDERFEATURE feature) const override;
  SCALINGMETHOD GetDefaultScalingMethod() const override { return SCALINGMETHOD::NEAREST; }

  static bool SupportsScalingMethod(SCALINGMETHOD method);

protected:
  struct PackedVertex
  {
    float x, y, z;
    float u1, v1;
  };
  struct Svertex
  {
    float x;
    float y;
    float z;
  };
  struct RenderBufferTextures
  {
    CGLTexture source;
    CGLTexture target;
  };

  // implementation of CRPBaseRenderer
  void RenderInternal(bool clear, uint8_t alpha) override;
  void FlushInternal() override;

  void ClearBackBuffer();

  void DrawBlackBars();

  virtual void Render(uint8_t alpha);

  std::map<CRenderBufferOpenGL*, std::unique_ptr<RenderBufferTextures>> m_RBTexturesMap;

  GLuint m_mainVAO;
  GLuint m_mainVertexVBO;
  GLuint m_mainIndexVBO;

  GLuint m_blackbarsVAO;
  GLuint m_blackbarsVertexVBO;

  GLenum m_textureTarget = GL_TEXTURE_2D;
  float m_clearColour = 0.0f;
};
} // namespace RETRO
} // namespace KODI