зеркало из https://github.com/mozilla/pjs.git
749 строки
23 KiB
C++
749 строки
23 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Bas Schouten <bschouten@mozilla.com>
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* Vladimir Vukicevic <vladimir@pobox.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "GLContextProvider.h"
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#include "GLContext.h"
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#include "nsDebug.h"
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#include "nsIWidget.h"
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#include "WGLLibrary.h"
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#include "gfxASurface.h"
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#include "gfxImageSurface.h"
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#include "gfxPlatform.h"
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#include "gfxWindowsSurface.h"
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#include "prenv.h"
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namespace mozilla {
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namespace gl {
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WGLLibrary sWGLLibrary;
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static HWND gSharedWindow = 0;
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static HDC gSharedWindowDC = 0;
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static HGLRC gSharedWindowGLContext = 0;
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static int gSharedWindowPixelFormat = 0;
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static PRBool gUseDoubleBufferedWindows = PR_FALSE;
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static HWND
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CreateDummyWindow(HDC *aWindowDC = nsnull)
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{
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WNDCLASSW wc;
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if (!GetClassInfoW(GetModuleHandle(NULL), L"GLContextWGLClass", &wc)) {
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ZeroMemory(&wc, sizeof(WNDCLASSW));
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wc.style = CS_OWNDC;
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wc.hInstance = GetModuleHandle(NULL);
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wc.lpfnWndProc = DefWindowProc;
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wc.lpszClassName = L"GLContextWGLClass";
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if (!RegisterClassW(&wc)) {
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NS_WARNING("Failed to register GLContextWGLClass?!");
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// er. failed to register our class?
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return NULL;
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}
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}
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HWND win = CreateWindowW(L"GLContextWGLClass", L"GLContextWGL", 0,
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0, 0, 16, 16,
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NULL, NULL, GetModuleHandle(NULL), NULL);
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NS_ENSURE_TRUE(win, NULL);
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HDC dc = GetDC(win);
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NS_ENSURE_TRUE(dc, NULL);
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if (gSharedWindowPixelFormat == 0) {
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PIXELFORMATDESCRIPTOR pfd;
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ZeroMemory(&pfd, sizeof(PIXELFORMATDESCRIPTOR));
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pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
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if (gUseDoubleBufferedWindows)
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pfd.dwFlags |= PFD_DOUBLEBUFFER;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 24;
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pfd.cRedBits = 8;
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pfd.cGreenBits = 8;
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pfd.cBlueBits = 8;
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pfd.cAlphaBits = 8;
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pfd.cDepthBits = 0;
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pfd.iLayerType = PFD_MAIN_PLANE;
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gSharedWindowPixelFormat = ChoosePixelFormat(dc, &pfd);
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}
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if (!SetPixelFormat(dc, gSharedWindowPixelFormat, NULL)) {
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NS_WARNING("SetPixelFormat failed!");
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DestroyWindow(win);
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return NULL;
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}
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if (aWindowDC) {
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*aWindowDC = dc;
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}
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return win;
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}
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PRBool
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WGLLibrary::EnsureInitialized()
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{
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if (mInitialized)
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return PR_TRUE;
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if (!mOGLLibrary) {
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mOGLLibrary = PR_LoadLibrary("Opengl32.dll");
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if (!mOGLLibrary) {
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NS_WARNING("Couldn't load OpenGL DLL.");
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return PR_FALSE;
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}
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}
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gUseDoubleBufferedWindows = PR_GetEnv("MOZ_WGL_DB") != nsnull;
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LibrarySymbolLoader::SymLoadStruct earlySymbols[] = {
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{ (PRFuncPtr*) &fCreateContext, { "wglCreateContext", NULL } },
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{ (PRFuncPtr*) &fMakeCurrent, { "wglMakeCurrent", NULL } },
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{ (PRFuncPtr*) &fGetProcAddress, { "wglGetProcAddress", NULL } },
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{ (PRFuncPtr*) &fDeleteContext, { "wglDeleteContext", NULL } },
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{ (PRFuncPtr*) &fGetCurrentContext, { "wglGetCurrentContext", NULL } },
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{ (PRFuncPtr*) &fGetCurrentDC, { "wglGetCurrentDC", NULL } },
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{ (PRFuncPtr*) &fShareLists, { "wglShareLists", NULL } },
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{ NULL, { NULL } }
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};
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if (!LibrarySymbolLoader::LoadSymbols(mOGLLibrary, &earlySymbols[0])) {
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NS_WARNING("Couldn't find required entry points in OpenGL DLL (early init)");
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return PR_FALSE;
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}
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// This is ridiculous -- we have to actually create a context to
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// get the OpenGL ICD to load.
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gSharedWindow = CreateDummyWindow(&gSharedWindowDC);
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NS_ENSURE_TRUE(gSharedWindow, PR_FALSE);
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// create rendering context
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gSharedWindowGLContext = fCreateContext(gSharedWindowDC);
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NS_ENSURE_TRUE(gSharedWindowGLContext, PR_FALSE);
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HGLRC curCtx = fGetCurrentContext();
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HDC curDC = fGetCurrentDC();
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if (!fMakeCurrent((HDC)gSharedWindowDC, (HGLRC)gSharedWindowGLContext)) {
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NS_WARNING("wglMakeCurrent failed");
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return PR_FALSE;
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}
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// Now we can grab all the other symbols that we couldn't without having
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// a context current.
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LibrarySymbolLoader::SymLoadStruct pbufferSymbols[] = {
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{ (PRFuncPtr*) &fCreatePbuffer, { "wglCreatePbufferARB", "wglCreatePbufferEXT", NULL } },
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{ (PRFuncPtr*) &fDestroyPbuffer, { "wglDestroyPbufferARB", "wglDestroyPbufferEXT", NULL } },
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{ (PRFuncPtr*) &fGetPbufferDC, { "wglGetPbufferDCARB", "wglGetPbufferDCEXT", NULL } },
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{ (PRFuncPtr*) &fBindTexImage, { "wglBindTexImageARB", "wglBindTexImageEXT", NULL } },
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{ (PRFuncPtr*) &fReleaseTexImage, { "wglReleaseTexImageARB", "wglReleaseTexImageEXT", NULL } },
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{ NULL, { NULL } }
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};
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LibrarySymbolLoader::SymLoadStruct pixFmtSymbols[] = {
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{ (PRFuncPtr*) &fChoosePixelFormat, { "wglChoosePixelFormatARB", "wglChoosePixelFormatEXT", NULL } },
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{ (PRFuncPtr*) &fGetPixelFormatAttribiv, { "wglGetPixelFormatAttribivARB", "wglGetPixelFormatAttribivEXT", NULL } },
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{ NULL, { NULL } }
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};
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if (!LibrarySymbolLoader::LoadSymbols(mOGLLibrary, &pbufferSymbols[0],
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(LibrarySymbolLoader::PlatformLookupFunction)fGetProcAddress))
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{
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// this isn't an error, just means that pbuffers aren't supported
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fCreatePbuffer = nsnull;
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}
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if (!LibrarySymbolLoader::LoadSymbols(mOGLLibrary, &pixFmtSymbols[0],
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(LibrarySymbolLoader::PlatformLookupFunction)fGetProcAddress))
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{
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// this isn't an error, just means that we don't have the pixel format extension
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fChoosePixelFormat = nsnull;
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}
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// reset back to the previous context, just in case
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fMakeCurrent(curDC, curCtx);
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mInitialized = PR_TRUE;
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// Call this to create the global GLContext instance,
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// and to check for errors. Note that this must happen /after/
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// setting mInitialized to TRUE, or an infinite loop results.
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if (GLContextProviderWGL::GetGlobalContext() == nsnull) {
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mInitialized = PR_FALSE;
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return PR_FALSE;
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}
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return PR_TRUE;
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}
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class GLContextWGL : public GLContext
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{
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public:
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GLContextWGL(const ContextFormat& aFormat,
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GLContext *aSharedContext,
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HDC aDC,
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HGLRC aContext,
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HWND aWindow = nsnull,
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PRBool aIsOffscreen = PR_FALSE)
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: GLContext(aFormat, aIsOffscreen, aSharedContext),
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mDC(aDC),
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mContext(aContext),
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mWnd(aWindow),
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mPBuffer(NULL),
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mPixelFormat(0),
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mIsDoubleBuffered(PR_FALSE)
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{
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}
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GLContextWGL(const ContextFormat& aFormat,
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GLContext *aSharedContext,
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HANDLE aPbuffer,
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HDC aDC,
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HGLRC aContext,
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int aPixelFormat)
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: GLContext(aFormat, PR_TRUE, aSharedContext),
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mDC(aDC),
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mContext(aContext),
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mWnd(NULL),
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mPBuffer(aPbuffer),
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mPixelFormat(aPixelFormat),
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mIsDoubleBuffered(PR_FALSE)
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{
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}
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~GLContextWGL()
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{
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MarkDestroyed();
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sWGLLibrary.fDeleteContext(mContext);
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if (mPBuffer)
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sWGLLibrary.fDestroyPbuffer(mPBuffer);
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if (mWnd)
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DestroyWindow(mWnd);
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}
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GLContextType GetContextType() {
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return ContextTypeWGL;
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}
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PRBool Init()
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{
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if (!mDC || !mContext)
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return PR_FALSE;
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MakeCurrent();
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SetupLookupFunction();
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return InitWithPrefix("gl", PR_TRUE);
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}
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PRBool MakeCurrentImpl(PRBool aForce = PR_FALSE)
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{
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BOOL succeeded = PR_TRUE;
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// wglGetCurrentContext seems to just pull the HGLRC out
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// of its TLS slot, so no need to do our own tls slot.
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// You would think that wglMakeCurrent would avoid doing
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// work if mContext was already current, but not so much..
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if (aForce || sWGLLibrary.fGetCurrentContext() != mContext) {
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succeeded = sWGLLibrary.fMakeCurrent(mDC, mContext);
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NS_ASSERTION(succeeded, "Failed to make GL context current!");
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}
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return succeeded;
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}
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void SetIsDoubleBuffered(PRBool aIsDB) {
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mIsDoubleBuffered = aIsDB;
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}
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virtual PRBool IsDoubleBuffered() {
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return mIsDoubleBuffered;
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}
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virtual PRBool SwapBuffers() {
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if (!mIsDoubleBuffered)
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return PR_FALSE;
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return ::SwapBuffers(mDC);
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}
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PRBool SetupLookupFunction()
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{
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mLookupFunc = (PlatformLookupFunction)sWGLLibrary.fGetProcAddress;
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return PR_TRUE;
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}
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void *GetNativeData(NativeDataType aType)
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{
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switch (aType) {
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case NativeGLContext:
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return mContext;
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default:
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return nsnull;
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}
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}
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PRBool BindTex2DOffscreen(GLContext *aOffscreen);
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void UnbindTex2DOffscreen(GLContext *aOffscreen);
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PRBool ResizeOffscreen(const gfxIntSize& aNewSize);
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HGLRC Context() { return mContext; }
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virtual already_AddRefed<TextureImage>
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CreateBasicTextureImage(GLuint aTexture,
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const nsIntSize& aSize,
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TextureImage::ContentType aContentType,
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GLContext* aContext);
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protected:
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friend class GLContextProviderWGL;
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HDC mDC;
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HGLRC mContext;
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HWND mWnd;
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HANDLE mPBuffer;
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int mPixelFormat;
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PRPackedBool mIsDoubleBuffered;
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};
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PRBool
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GLContextWGL::BindTex2DOffscreen(GLContext *aOffscreen)
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{
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if (aOffscreen->GetContextType() != ContextTypeWGL) {
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NS_WARNING("non-WGL context");
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return PR_FALSE;
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}
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if (!aOffscreen->IsOffscreen()) {
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NS_WARNING("non-offscreen context");
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return PR_FALSE;
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}
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GLContextWGL *offs = static_cast<GLContextWGL*>(aOffscreen);
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if (offs->mPBuffer) {
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BOOL ok = sWGLLibrary.fBindTexImage(offs->mPBuffer,
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LOCAL_WGL_FRONT_LEFT_ARB);
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if (!ok) {
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NS_WARNING("CanvasLayerOGL::Updated wglBindTexImageARB failed");
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return PR_FALSE;
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}
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} else if (offs->mOffscreenTexture) {
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if (offs->GetSharedContext() != GLContextProviderWGL::GetGlobalContext())
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{
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NS_WARNING("offscreen FBO context can only be bound with context sharing!");
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return PR_FALSE;
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}
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fBindTexture(LOCAL_GL_TEXTURE_2D, offs->mOffscreenTexture);
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} else {
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NS_WARNING("don't know how to bind this!");
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return PR_FALSE;
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}
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return PR_TRUE;
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}
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void
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GLContextWGL::UnbindTex2DOffscreen(GLContext *aOffscreen)
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{
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NS_ASSERTION(aOffscreen->GetContextType() == ContextTypeWGL, "wrong type");
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GLContextWGL *offs = static_cast<GLContextWGL*>(aOffscreen);
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if (offs->mPBuffer) {
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// XXX so, according to the extension, ReleaseTexImage is not required to
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// preserve color buffer contents. This sucks, but everywhere that I've
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// tried it the color buffer is preserved. So let's cross our fingers..
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sWGLLibrary.fReleaseTexImage(offs->mPBuffer, LOCAL_WGL_FRONT_LEFT_ARB);
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}
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}
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PRBool
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GLContextWGL::ResizeOffscreen(const gfxIntSize& aNewSize)
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{
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if (mPBuffer) {
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int pbattrs[] = {
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LOCAL_WGL_TEXTURE_FORMAT_ARB,
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mCreationFormat.alpha > 0 ? LOCAL_WGL_TEXTURE_RGBA_ARB
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: LOCAL_WGL_TEXTURE_RGB_ARB,
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LOCAL_WGL_TEXTURE_TARGET_ARB, LOCAL_WGL_TEXTURE_2D_ARB,
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0
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};
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HANDLE newbuf = sWGLLibrary.fCreatePbuffer(gSharedWindowDC, mPixelFormat,
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aNewSize.width, aNewSize.height,
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pbattrs);
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if (!newbuf)
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return PR_FALSE;
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bool isCurrent = false;
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if (sWGLLibrary.fGetCurrentContext() == mContext) {
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sWGLLibrary.fMakeCurrent(NULL, NULL);
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isCurrent = true;
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}
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sWGLLibrary.fDestroyPbuffer(mPBuffer);
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mPBuffer = newbuf;
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mDC = sWGLLibrary.fGetPbufferDC(mPBuffer);
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mOffscreenSize = aNewSize;
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mOffscreenActualSize = aNewSize;
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MakeCurrent();
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ClearSafely();
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return PR_TRUE;
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}
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return ResizeOffscreenFBO(aNewSize);
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}
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static GLContextWGL *
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GetGlobalContextWGL()
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{
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return static_cast<GLContextWGL*>(GLContextProviderWGL::GetGlobalContext());
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}
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class TextureImageWGL : public BasicTextureImage
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{
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friend already_AddRefed<TextureImage>
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GLContextWGL::CreateBasicTextureImage(GLuint,
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const nsIntSize&,
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TextureImage::ContentType,
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GLContext*);
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protected:
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virtual already_AddRefed<gfxASurface>
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CreateUpdateSurface(const gfxIntSize& aSize, ImageFormat aFmt)
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{
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mUpdateSize = aSize;
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mUpdateFormat = aFmt;
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return gfxPlatform::GetPlatform()->CreateOffscreenSurface(aSize, gfxASurface::ContentFromFormat(aFmt));
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}
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virtual already_AddRefed<gfxImageSurface>
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GetImageForUpload(gfxASurface* aUpdateSurface)
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{
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nsRefPtr<gfxImageSurface> uploadImage;
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if (aUpdateSurface->GetType() == gfxASurface::SurfaceTypeWin32) {
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gfxWindowsSurface* ws = static_cast<gfxWindowsSurface*>(aUpdateSurface);
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uploadImage = ws->GetImageSurface();
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} else {
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uploadImage = new gfxImageSurface(mUpdateSize, mUpdateFormat);
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nsRefPtr<gfxContext> cx(new gfxContext(uploadImage));
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cx->SetSource(aUpdateSurface);
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cx->SetOperator(gfxContext::OPERATOR_SOURCE);
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cx->Paint();
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}
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return uploadImage.forget();
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}
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private:
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TextureImageWGL(GLuint aTexture,
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const nsIntSize& aSize,
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ContentType aContentType,
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GLContext* aContext)
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: BasicTextureImage(aTexture, aSize, aContentType, aContext)
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{}
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gfxIntSize mUpdateSize;
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ImageFormat mUpdateFormat;
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};
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already_AddRefed<TextureImage>
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GLContextWGL::CreateBasicTextureImage(GLuint aTexture,
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const nsIntSize& aSize,
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TextureImage::ContentType aContentType,
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GLContext* aContext)
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{
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nsRefPtr<TextureImageWGL> teximage(
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new TextureImageWGL(aTexture, aSize, aContentType, aContext));
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return teximage.forget();
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}
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already_AddRefed<GLContext>
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GLContextProviderWGL::CreateForWindow(nsIWidget *aWidget)
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{
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if (!sWGLLibrary.EnsureInitialized()) {
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return nsnull;
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}
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/**
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* We need to make sure we call SetPixelFormat -after- calling
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* EnsureInitialized, otherwise it can load/unload the dll and
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* wglCreateContext will fail.
|
|
*/
|
|
|
|
HDC dc = (HDC)aWidget->GetNativeData(NS_NATIVE_GRAPHIC);
|
|
|
|
SetPixelFormat(dc, gSharedWindowPixelFormat, NULL);
|
|
HGLRC context = sWGLLibrary.fCreateContext(dc);
|
|
if (!context) {
|
|
return nsnull;
|
|
}
|
|
|
|
GLContextWGL *shareContext = GetGlobalContextWGL();
|
|
if (shareContext &&
|
|
!sWGLLibrary.fShareLists(shareContext->Context(), context))
|
|
{
|
|
shareContext = nsnull;
|
|
}
|
|
|
|
nsRefPtr<GLContextWGL> glContext = new GLContextWGL(ContextFormat(ContextFormat::BasicRGB24),
|
|
shareContext, dc, context);
|
|
if (!glContext->Init()) {
|
|
return nsnull;
|
|
}
|
|
|
|
glContext->SetIsDoubleBuffered(gUseDoubleBufferedWindows);
|
|
|
|
return glContext.forget();
|
|
}
|
|
|
|
static already_AddRefed<GLContextWGL>
|
|
CreatePBufferOffscreenContext(const gfxIntSize& aSize,
|
|
const ContextFormat& aFormat)
|
|
{
|
|
#define A1(_a,_x) do { _a.AppendElement(_x); } while(0)
|
|
#define A2(_a,_x,_y) do { _a.AppendElement(_x); _a.AppendElement(_y); } while(0)
|
|
|
|
nsTArray<int> attrs;
|
|
|
|
A2(attrs, LOCAL_WGL_SUPPORT_OPENGL_ARB, LOCAL_GL_TRUE);
|
|
A2(attrs, LOCAL_WGL_DRAW_TO_PBUFFER_ARB, LOCAL_GL_TRUE);
|
|
A2(attrs, LOCAL_WGL_DOUBLE_BUFFER_ARB, LOCAL_GL_FALSE);
|
|
|
|
A2(attrs, LOCAL_WGL_ACCELERATION_ARB, LOCAL_WGL_FULL_ACCELERATION_ARB);
|
|
|
|
A2(attrs, LOCAL_WGL_COLOR_BITS_ARB, aFormat.colorBits());
|
|
A2(attrs, LOCAL_WGL_RED_BITS_ARB, aFormat.red);
|
|
A2(attrs, LOCAL_WGL_GREEN_BITS_ARB, aFormat.green);
|
|
A2(attrs, LOCAL_WGL_BLUE_BITS_ARB, aFormat.blue);
|
|
A2(attrs, LOCAL_WGL_ALPHA_BITS_ARB, aFormat.alpha);
|
|
|
|
A2(attrs, LOCAL_WGL_DEPTH_BITS_ARB, aFormat.depth);
|
|
|
|
if (aFormat.alpha > 0) {
|
|
A2(attrs, LOCAL_WGL_BIND_TO_TEXTURE_RGBA_ARB, LOCAL_GL_TRUE);
|
|
} else {
|
|
A2(attrs, LOCAL_WGL_BIND_TO_TEXTURE_RGB_ARB, LOCAL_GL_TRUE);
|
|
}
|
|
|
|
A2(attrs, LOCAL_WGL_DOUBLE_BUFFER_ARB, LOCAL_GL_FALSE);
|
|
A2(attrs, LOCAL_WGL_STEREO_ARB, LOCAL_GL_FALSE);
|
|
|
|
A1(attrs, 0);
|
|
|
|
nsTArray<int> pbattrs;
|
|
A2(pbattrs, LOCAL_WGL_TEXTURE_TARGET_ARB, LOCAL_WGL_TEXTURE_2D_ARB);
|
|
|
|
if (aFormat.alpha > 0) {
|
|
A2(pbattrs, LOCAL_WGL_TEXTURE_FORMAT_ARB, LOCAL_WGL_TEXTURE_RGBA_ARB);
|
|
} else {
|
|
A2(pbattrs, LOCAL_WGL_TEXTURE_FORMAT_ARB, LOCAL_WGL_TEXTURE_RGB_ARB);
|
|
}
|
|
A1(pbattrs, 0);
|
|
|
|
UINT numFormats = 256;
|
|
int formats[256];
|
|
|
|
if (!sWGLLibrary.fChoosePixelFormat(gSharedWindowDC,
|
|
attrs.Elements(), NULL,
|
|
numFormats, formats, &numFormats)
|
|
|| numFormats == 0)
|
|
{
|
|
return nsnull;
|
|
}
|
|
|
|
// XXX add back the priority choosing code here
|
|
int chosenFormat = formats[0];
|
|
|
|
HANDLE pbuffer = sWGLLibrary.fCreatePbuffer(gSharedWindowDC, chosenFormat,
|
|
aSize.width, aSize.height,
|
|
pbattrs.Elements());
|
|
if (!pbuffer) {
|
|
return nsnull;
|
|
}
|
|
|
|
HDC pbdc = sWGLLibrary.fGetPbufferDC(pbuffer);
|
|
NS_ASSERTION(pbdc, "expected a dc");
|
|
|
|
HGLRC context = sWGLLibrary.fCreateContext(pbdc);
|
|
if (!context) {
|
|
sWGLLibrary.fDestroyPbuffer(pbuffer);
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsRefPtr<GLContextWGL> glContext = new GLContextWGL(aFormat,
|
|
nsnull,
|
|
pbuffer,
|
|
pbdc,
|
|
context,
|
|
chosenFormat);
|
|
|
|
return glContext.forget();
|
|
}
|
|
|
|
static already_AddRefed<GLContextWGL>
|
|
CreateWindowOffscreenContext(const gfxIntSize& aSize,
|
|
const ContextFormat& aFormat)
|
|
{
|
|
// CreateWindowOffscreenContext must return a global-shared context
|
|
GLContextWGL *shareContext = GetGlobalContextWGL();
|
|
if (!shareContext) {
|
|
return nsnull;
|
|
}
|
|
|
|
HDC dc;
|
|
HWND win = CreateDummyWindow(&dc);
|
|
if (!win) {
|
|
return nsnull;
|
|
}
|
|
|
|
HGLRC context = sWGLLibrary.fCreateContext(dc);
|
|
if (!context) {
|
|
return nsnull;
|
|
}
|
|
|
|
if (!sWGLLibrary.fShareLists(shareContext->Context(), context)) {
|
|
NS_WARNING("wglShareLists failed!");
|
|
|
|
sWGLLibrary.fDeleteContext(context);
|
|
DestroyWindow(win);
|
|
return nsnull;
|
|
}
|
|
|
|
nsRefPtr<GLContextWGL> glContext = new GLContextWGL(aFormat, shareContext,
|
|
dc, context, win, PR_TRUE);
|
|
|
|
return glContext.forget();
|
|
}
|
|
|
|
already_AddRefed<GLContext>
|
|
GLContextProviderWGL::CreateOffscreen(const gfxIntSize& aSize,
|
|
const ContextFormat& aFormat)
|
|
{
|
|
if (!sWGLLibrary.EnsureInitialized()) {
|
|
return nsnull;
|
|
}
|
|
|
|
nsRefPtr<GLContextWGL> glContext;
|
|
|
|
// Always try to create a pbuffer context first, because we
|
|
// want the context isolation.
|
|
if (sWGLLibrary.fCreatePbuffer &&
|
|
sWGLLibrary.fChoosePixelFormat)
|
|
{
|
|
glContext = CreatePBufferOffscreenContext(aSize, aFormat);
|
|
}
|
|
|
|
// If it failed, then create a window context and use a FBO.
|
|
if (!glContext) {
|
|
glContext = CreateWindowOffscreenContext(aSize, aFormat);
|
|
}
|
|
|
|
if (!glContext ||
|
|
!glContext->Init())
|
|
{
|
|
return nsnull;
|
|
}
|
|
|
|
glContext->mOffscreenSize = aSize;
|
|
glContext->mOffscreenActualSize = aSize;
|
|
|
|
if (!glContext->mPBuffer &&
|
|
!glContext->ResizeOffscreenFBO(aSize))
|
|
{
|
|
return nsnull;
|
|
}
|
|
|
|
return glContext.forget();
|
|
}
|
|
|
|
already_AddRefed<GLContext>
|
|
GLContextProviderWGL::CreateForNativePixmapSurface(gfxASurface *aSurface)
|
|
{
|
|
return nsnull;
|
|
}
|
|
|
|
static nsRefPtr<GLContextWGL> gGlobalContext;
|
|
|
|
GLContext *
|
|
GLContextProviderWGL::GetGlobalContext()
|
|
{
|
|
if (!sWGLLibrary.EnsureInitialized()) {
|
|
return nsnull;
|
|
}
|
|
|
|
static bool triedToCreateContext = false;
|
|
|
|
if (!triedToCreateContext && !gGlobalContext) {
|
|
triedToCreateContext = true;
|
|
|
|
// conveniently, we already have what we need...
|
|
gGlobalContext = new GLContextWGL(ContextFormat(ContextFormat::BasicRGB24), nsnull,
|
|
gSharedWindowDC, gSharedWindowGLContext);
|
|
if (!gGlobalContext->Init()) {
|
|
NS_WARNING("Global context GLContext initialization failed?");
|
|
gGlobalContext = nsnull;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
gGlobalContext->SetIsGlobalSharedContext(PR_TRUE);
|
|
}
|
|
|
|
return static_cast<GLContext*>(gGlobalContext);
|
|
}
|
|
|
|
void
|
|
GLContextProviderWGL::Shutdown()
|
|
{
|
|
gGlobalContext = nsnull;
|
|
}
|
|
|
|
} /* namespace gl */
|
|
} /* namespace mozilla */
|