axal 0.1.0

Framework to greatly simply emulation core development. Provides methods to auto-generate bindings for libretro in addition to a stand-alone UI.
Documentation 
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#ifndef AXAL_VIEWPORT_H
#define AXAL_VIEWPORT_H 1

#include <QOpenGLWidget>
#include <QOpenGLFunctions>
#include <QOpenGLVertexArrayObject>
#include <QKeyEvent>
#include <unordered_map>

#include "axal.h"

namespace ax {

class Player;
class Runtime;

class Viewport : public QOpenGLWidget, protected QOpenGLFunctions {
 Q_OBJECT

 public:
  Viewport(QWidget* parent);
  virtual ~Viewport() noexcept;

  void setViewportVisible(bool v);
  void setPixelFormat(axal_format fmt);

 public slots:
  void updateFramebuffer(void* framebuffer, unsigned w, unsigned h);

 signals:
  void framebufferUpdated(void* framebuffer, unsigned w, unsigned h);

 protected:
  virtual void initializeGL();
  virtual void paintGL();
  virtual void resizeGL(int w, int h);

  virtual void keyPressEvent(QKeyEvent*);
  virtual void keyReleaseEvent(QKeyEvent*);

 private:
  friend class Player;
  friend class Runtime;

  static void _video_refresh(void* userdata,
    uint8_t* data, uint32_t width, uint32_t height, uint32_t pitch);

  bool _visible;

  GLuint _texture;
  QOpenGLVertexArrayObject _vao;

  GLuint _vbo;
  GLuint _ebo;

  GLuint _shader;

  std::unordered_map<int, axal_key> _qkey_to_axkey;
  std::unordered_map<axal_key, bool> _key_state;

  unsigned _width;
  unsigned _height;

  GLint _tex_internalFormat;
  GLenum _tex_format;
  GLenum _tex_type;

};

}  // namespace ax

#endif  // AXAL_VIEWPORT_H