Duckstation/src/util/opengl_context_egl.h

// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)

#pragma once

#include "opengl_context.h"

#include "glad/egl.h"

class OpenGLContextEGL : public OpenGLContext
{
public:
  OpenGLContextEGL(const WindowInfo& wi);
  ~OpenGLContextEGL() override;

  static std::unique_ptr<OpenGLContext> Create(const WindowInfo& wi, std::span<const Version> versions_to_try,
                                               Error* error);

  void* GetProcAddress(const char* name) override;
  virtual bool ChangeSurface(const WindowInfo& new_wi) override;
  virtual void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
  bool SwapBuffers() override;
  bool IsCurrent() const override;
  bool MakeCurrent() override;
  bool DoneCurrent() override;
  bool SupportsNegativeSwapInterval() const override;
  bool SetSwapInterval(s32 interval) override;
  virtual std::unique_ptr<OpenGLContext> CreateSharedContext(const WindowInfo& wi, Error* error) override;

protected:
  virtual EGLDisplay GetPlatformDisplay(Error* error);
  virtual EGLSurface CreatePlatformSurface(EGLConfig config, void* win, Error* error);

  EGLDisplay TryGetPlatformDisplay(EGLenum platform, const char* platform_ext);
  EGLSurface TryCreatePlatformSurface(EGLConfig config, void* window, Error* error);
  EGLDisplay GetFallbackDisplay(Error* error);
  EGLSurface CreateFallbackSurface(EGLConfig config, void* window, Error* error);

  bool Initialize(std::span<const Version> versions_to_try, Error* error);
  bool CreateContext(const Version& version, EGLContext share_context);
  bool CreateContextAndSurface(const Version& version, EGLContext share_context, bool make_current);
  bool CreateSurface();
  bool CreatePBufferSurface();
  bool CheckConfigSurfaceFormat(EGLConfig config, GPUTexture::Format format);
  GPUTexture::Format GetSurfaceTextureFormat() const;
  void DestroyContext();
  void DestroySurface();

  EGLDisplay m_display = EGL_NO_DISPLAY;
  EGLSurface m_surface = EGL_NO_SURFACE;
  EGLContext m_context = EGL_NO_CONTEXT;

  EGLConfig m_config = {};

  bool m_use_ext_platform_base = false;
  bool m_supports_negative_swap_interval = false;
};