gfx/gl/WGLLibrary.h

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "GLContextTypes.h"
   7 #include "GLLibraryLoader.h"
   8 #include "mozilla/UniquePtr.h"
   9 #include <windows.h>
  10
  11 struct PRLibrary;
  12
  13 namespace mozilla {
  14 namespace gl {
  15 /*
  16 struct ScopedDC
  17 {
  18     const HDC mDC;
  19
  20     ScopedDC() = delete;
  21     virtual ~ScopedDC() = 0;
  22 };
  23
  24 struct WindowDC final : public ScopedDC
  25 {
  26     const HWND mWindow;
  27
  28     WindowDC() = delete;
  29     ~WindowDC();
  30 };
  31
  32 struct PBufferDC final : public ScopedDC
  33 {
  34     const HWND mWindow;
  35
  36     PBufferDC() = delete;
  37     ~PBufferDC();
  38 };
  39 */
  40 class WGLLibrary {
  41  public:
  42   ~WGLLibrary() { Reset(); }
  43
  44  private:
  45   void Reset();
  46
  47  public:
  48   struct {
  49     HGLRC(GLAPIENTRY* fCreateContext)(HDC);
  50     BOOL(GLAPIENTRY* fDeleteContext)(HGLRC);
  51     BOOL(GLAPIENTRY* fMakeCurrent)(HDC, HGLRC);
  52     PROC(GLAPIENTRY* fGetProcAddress)(LPCSTR);
  53     HGLRC(GLAPIENTRY* fGetCurrentContext)(void);
  54     HDC(GLAPIENTRY* fGetCurrentDC)(void);
  55     // BOOL   (GLAPIENTRY * fShareLists) (HGLRC oldContext, HGLRC newContext);
  56     HANDLE(GLAPIENTRY* fCreatePbuffer)
  57     (HDC hDC, int iPixelFormat, int iWidth, int iHeight,
  58      const int* piAttribList);
  59     BOOL(GLAPIENTRY* fDestroyPbuffer)(HANDLE hPbuffer);
  60     HDC(GLAPIENTRY* fGetPbufferDC)(HANDLE hPbuffer);
  61     int(GLAPIENTRY* fReleasePbufferDC)(HANDLE hPbuffer, HDC dc);
  62     // BOOL (GLAPIENTRY * fBindTexImage) (HANDLE hPbuffer, int iBuffer);
  63     // BOOL (GLAPIENTRY * fReleaseTexImage) (HANDLE hPbuffer, int iBuffer);
  64     BOOL(GLAPIENTRY* fChoosePixelFormat)
  65     (HDC hdc, const int* piAttribIList, const FLOAT* pfAttribFList,
  66      UINT nMaxFormats, int* piFormats, UINT* nNumFormats);
  67     // BOOL (GLAPIENTRY * fGetPixelFormatAttribiv) (HDC hdc,
  68     //                                             int iPixelFormat,
  69     //                                             int iLayerPlane,
  70     //                                             UINT nAttributes,
  71     //                                             int* piAttributes,
  72     //                                             int* piValues);
  73     const char*(GLAPIENTRY* fGetExtensionsStringARB)(HDC hdc);
  74     HGLRC(GLAPIENTRY* fCreateContextAttribsARB)
  75     (HDC hdc, HGLRC hShareContext, const int* attribList);
  76     // WGL_NV_DX_interop:
  77     BOOL(GLAPIENTRY* fDXSetResourceShareHandleNV)
  78     (void* dxObject, HANDLE shareHandle);
  79     HANDLE(GLAPIENTRY* fDXOpenDeviceNV)(void* dxDevice);
  80     BOOL(GLAPIENTRY* fDXCloseDeviceNV)(HANDLE hDevice);
  81     HANDLE(GLAPIENTRY* fDXRegisterObjectNV)
  82     (HANDLE hDevice, void* dxObject, GLuint name, GLenum type, GLenum access);
  83     BOOL(GLAPIENTRY* fDXUnregisterObjectNV)(HANDLE hDevice, HANDLE hObject);
  84     BOOL(GLAPIENTRY* fDXObjectAccessNV)(HANDLE hObject, GLenum access);
  85     BOOL(GLAPIENTRY* fDXLockObjectsNV)
  86     (HANDLE hDevice, GLint count, HANDLE* hObjects);
  87     BOOL(GLAPIENTRY* fDXUnlockObjectsNV)
  88     (HANDLE hDevice, GLint count, HANDLE* hObjects);
  89   } mSymbols = {};
  90
  91   bool EnsureInitialized();
  92   // UniquePtr<WindowDC> CreateDummyWindow();
  93   HGLRC CreateContextWithFallback(HDC dc, bool tryRobustBuffers) const;
  94
  95   bool HasDXInterop2() const { return bool(mSymbols.fDXOpenDeviceNV); }
  96   bool IsInitialized() const { return mInitialized; }
  97   auto GetOGLLibrary() const { return mOGLLibrary; }
  98   auto RootDc() const { return mRootDc; }
  99   SymbolLoader GetSymbolLoader() const;
 100
 101  private:
 102   bool mInitialized = false;
 103   PRLibrary* mOGLLibrary;
 104   bool mHasRobustness;
 105   HWND mDummyWindow;
 106   HDC mRootDc;
 107   HGLRC mDummyGlrc;
 108 };
 109
 110 // a global WGLLibrary instance
 111 extern WGLLibrary sWGLLib;
 112
 113 } /* namespace gl */
 114 } /* namespace mozilla */