gfx/gl/WGLLibrary.h

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   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 <windows.h>
   8
   9 struct PRLibrary;
  10
  11 namespace mozilla {
  12 namespace gl {
  13
  14 class WGLLibrary
  15 {
  16 public:
  17     WGLLibrary()
  18       : mInitialized(false),
  19         mOGLLibrary(nullptr),
  20         mHasRobustness(false),
  21         mWindow (0),
  22         mWindowDC(0),
  23         mWindowGLContext(0),
  24         mWindowPixelFormat (0)
  25     {}
  26
  27     typedef HGLRC (GLAPIENTRY * PFNWGLCREATECONTEXTPROC) (HDC);
  28     PFNWGLCREATECONTEXTPROC fCreateContext;
  29     typedef BOOL (GLAPIENTRY * PFNWGLDELETECONTEXTPROC) (HGLRC);
  30     PFNWGLDELETECONTEXTPROC fDeleteContext;
  31     typedef BOOL (GLAPIENTRY * PFNWGLMAKECURRENTPROC) (HDC, HGLRC);
  32     PFNWGLMAKECURRENTPROC fMakeCurrent;
  33     typedef PROC (GLAPIENTRY * PFNWGLGETPROCADDRESSPROC) (LPCSTR);
  34     PFNWGLGETPROCADDRESSPROC fGetProcAddress;
  35     typedef HGLRC (GLAPIENTRY * PFNWGLGETCURRENTCONTEXT) (void);
  36     PFNWGLGETCURRENTCONTEXT fGetCurrentContext;
  37     typedef HDC (GLAPIENTRY * PFNWGLGETCURRENTDC) (void);
  38     PFNWGLGETCURRENTDC fGetCurrentDC;
  39     typedef BOOL (GLAPIENTRY * PFNWGLSHARELISTS) (HGLRC oldContext, HGLRC newContext);
  40     PFNWGLSHARELISTS fShareLists;
  41
  42     typedef HANDLE (WINAPI * PFNWGLCREATEPBUFFERPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int* piAttribList);
  43     PFNWGLCREATEPBUFFERPROC fCreatePbuffer;
  44     typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFERPROC) (HANDLE hPbuffer);
  45     PFNWGLDESTROYPBUFFERPROC fDestroyPbuffer;
  46     typedef HDC (WINAPI * PFNWGLGETPBUFFERDCPROC) (HANDLE hPbuffer);
  47     PFNWGLGETPBUFFERDCPROC fGetPbufferDC;
  48
  49     typedef BOOL (WINAPI * PFNWGLBINDTEXIMAGEPROC) (HANDLE hPbuffer, int iBuffer);
  50     PFNWGLBINDTEXIMAGEPROC fBindTexImage;
  51     typedef BOOL (WINAPI * PFNWGLRELEASETEXIMAGEPROC) (HANDLE hPbuffer, int iBuffer);
  52     PFNWGLRELEASETEXIMAGEPROC fReleaseTexImage;
  53
  54     typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATPROC) (HDC hdc, const int* piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
  55     PFNWGLCHOOSEPIXELFORMATPROC fChoosePixelFormat;
  56     typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int* piAttributes, int *piValues);
  57     PFNWGLGETPIXELFORMATATTRIBIVPROC fGetPixelFormatAttribiv;
  58
  59     typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGPROC) (HDC hdc);
  60     PFNWGLGETEXTENSIONSSTRINGPROC fGetExtensionsString;
  61
  62     typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSPROC) (HDC hdc, HGLRC hShareContext, const int *attribList);
  63     PFNWGLCREATECONTEXTATTRIBSPROC fCreateContextAttribs;
  64
  65     bool EnsureInitialized();
  66     HWND CreateDummyWindow(HDC *aWindowDC = nullptr);
  67
  68     bool HasRobustness() const { return mHasRobustness; }
  69     bool IsInitialized() const { return mInitialized; }
  70     HWND GetWindow() const { return mWindow; }
  71     HDC GetWindowDC() const {return mWindowDC; }
  72     HGLRC GetWindowGLContext() const {return mWindowGLContext; }
  73     int GetWindowPixelFormat() const { return mWindowPixelFormat; }
  74     PRLibrary *GetOGLLibrary() { return mOGLLibrary; }
  75
  76 private:
  77     bool mInitialized;
  78     PRLibrary *mOGLLibrary;
  79     bool mHasRobustness;
  80
  81     HWND mWindow;
  82     HDC mWindowDC;
  83     HGLRC mWindowGLContext;
  84     int mWindowPixelFormat;
  85
  86 };
  87
  88 // a global WGLLibrary instance
  89 extern WGLLibrary sWGLLibrary;
  90
  91 } /* namespace gl */
  92 } /* namespace mozilla */
  93