// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GL_GL_WGL_API_IMPLEMENTATION_H_
#define UI_GL_GL_WGL_API_IMPLEMENTATION_H_

#include <string>
#include <vector>

#include "base/compiler_specific.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_export.h"

namespace gl {

struct GLWindowSystemBindingInfo;

GL_EXPORT void InitializeStaticGLBindingsWGL();
GL_EXPORT void InitializeDebugGLBindingsWGL();
GL_EXPORT void ClearBindingsWGL();
GL_EXPORT bool GetGLWindowSystemBindingInfoWGL(GLWindowSystemBindingInfo* info);
GL_EXPORT void SetDisabledExtensionsWGL(const std::string& disabled_extensions);
GL_EXPORT bool InitializeExtensionSettingsOneOffWGL();

class GL_EXPORT WGLApiBase : public WGLApi {
 public:
  // Include the auto-generated part of this class. We split this because
  // it means we can easily edit the non-auto generated parts right here in
  // this file instead of having to edit some template or the code generator.
  #include "gl_bindings_api_autogen_wgl.h"

 protected:
  WGLApiBase();
  ~WGLApiBase() override;
  void InitializeBase(DriverWGL* driver);

  DriverWGL* driver_;
};

class GL_EXPORT RealWGLApi : public WGLApiBase {
 public:
  RealWGLApi();
  ~RealWGLApi() override;
  void Initialize(DriverWGL* driver);
  void SetDisabledExtensions(const std::string& disabled_extensions) override;

  const char* wglGetExtensionsStringARBFn(HDC hDC) override;
  const char* wglGetExtensionsStringEXTFn() override;
 private:

  std::vector<std::string> disabled_exts_;
  std::string filtered_arb_exts_;
  std::string filtered_ext_exts_;
};

// Logs debug information for every WGL call.
class GL_EXPORT DebugWGLApi : public WGLApi {
 public:
  DebugWGLApi(WGLApi* wgl_api);
  ~DebugWGLApi() override;
  void SetDisabledExtensions(const std::string& disabled_extensions) override;

  // Include the auto-generated part of this class. We split this because
  // it means we can easily edit the non-auto generated parts right here in
  // this file instead of having to edit some template or the code generator.
  #include "gl_bindings_api_autogen_wgl.h"

 private:
  WGLApi* wgl_api_;
};

// Inserts a TRACE for every WGL call.
class GL_EXPORT TraceWGLApi : public WGLApi {
 public:
  TraceWGLApi(WGLApi* wgl_api) : wgl_api_(wgl_api) { }
  ~TraceWGLApi() override;
  void SetDisabledExtensions(const std::string& disabled_extensions) override;

  // Include the auto-generated part of this class. We split this because
  // it means we can easily edit the non-auto generated parts right here in
  // this file instead of having to edit some template or the code generator.
  #include "gl_bindings_api_autogen_wgl.h"

 private:
  WGLApi* wgl_api_;
};

}  // namespace gl

#endif  // UI_GL_GL_WGL_API_IMPLEMENTATION_H_