The Tor Browser: gfx/gl/GLContextProviderGLX.cpp@b8a032363ba2 (annotated)

gfx/gl/GLContextProviderGLX.cpp@b8a032363ba2 (annotated)

gfx/gl/GLContextProviderGLX.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifdef MOZ_WIDGET_GTK
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #define GET_NATIVE_WINDOW(aWidget) GDK_WINDOW_XID((GdkWindow *) aWidget->GetNativeData(NS_NATIVE_WINDOW))
 #elif defined(MOZ_WIDGET_QT)
 #define GET_NATIVE_WINDOW(aWidget) (Window)(aWidget->GetNativeData(NS_NATIVE_SHAREABLE_WINDOW))
 #endif
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include "mozilla/MathAlgorithms.h"
 #include "mozilla/StaticPtr.h"
 #include "mozilla/X11Util.h"
 #include "prenv.h"
 #include "GLContextProvider.h"
 #include "GLLibraryLoader.h"
 #include "nsDebug.h"
 #include "nsIWidget.h"
 #include "GLXLibrary.h"
 #include "gfxXlibSurface.h"
 #include "gfxContext.h"
 #include "gfxPlatform.h"
 #include "GLContextGLX.h"
 #include "gfxUtils.h"
 #include "gfx2DGlue.h"
 #include "gfxCrashReporterUtils.h"
 #ifdef MOZ_WIDGET_GTK
 #include "gfxPlatformGtk.h"
 #endif
 using namespace mozilla::gfx;
 namespace mozilla {
 namespace gl {
 GLXLibrary sGLXLibrary;
 // Check that we have at least version aMajor.aMinor .
 bool
 GLXLibrary::GLXVersionCheck(int aMajor, int aMinor)
 {
     return aMajor < mGLXMajorVersion ||
            (aMajor == mGLXMajorVersion && aMinor <= mGLXMinorVersion);
 }
 static inline bool
 HasExtension(const char* aExtensions, const char* aRequiredExtension)
 {
     return GLContext::ListHasExtension(
         reinterpret_cast<const GLubyte*>(aExtensions), aRequiredExtension);
 }
 bool
 GLXLibrary::EnsureInitialized()
 {
     if (mInitialized) {
         return true;
     }
     // Don't repeatedly try to initialize.
     if (mTriedInitializing) {
         return false;
     }
     mTriedInitializing = true;
     // Force enabling s3 texture compression. (Bug 774134)
     PR_SetEnv("force_s3tc_enable=true");
     if (!mOGLLibrary) {
         const char* libGLfilename = nullptr;
         bool forceFeatureReport = false;
         // see e.g. bug 608526: it is intrinsically interesting to know whether we have dynamically linked to libGL.so.1
         // because at least the NVIDIA implementation requires an executable stack, which causes mprotect calls,
         // which trigger glibc bug http://sourceware.org/bugzilla/show_bug.cgi?id=12225
 #ifdef __OpenBSD__
         libGLfilename = "libGL.so";
 #else
         libGLfilename = "libGL.so.1";
 #endif
         ScopedGfxFeatureReporter reporter(libGLfilename, forceFeatureReport);
         mOGLLibrary = PR_LoadLibrary(libGLfilename);
         if (!mOGLLibrary) {
             NS_WARNING("Couldn't load OpenGL shared library.");
             return false;
         }
         reporter.SetSuccessful();
     }
     if (PR_GetEnv("MOZ_GLX_DEBUG")) {
         mDebug = true;
     }
     GLLibraryLoader::SymLoadStruct symbols[] = {
         /* functions that were in GLX 1.0 */
         { (PRFuncPtr*) &xDestroyContextInternal, { "glXDestroyContext", nullptr } },
         { (PRFuncPtr*) &xMakeCurrentInternal, { "glXMakeCurrent", nullptr } },
         { (PRFuncPtr*) &xSwapBuffersInternal, { "glXSwapBuffers", nullptr } },
         { (PRFuncPtr*) &xQueryVersionInternal, { "glXQueryVersion", nullptr } },
         { (PRFuncPtr*) &xGetCurrentContextInternal, { "glXGetCurrentContext", nullptr } },
         { (PRFuncPtr*) &xWaitGLInternal, { "glXWaitGL", nullptr } },
         { (PRFuncPtr*) &xWaitXInternal, { "glXWaitX", nullptr } },
         /* functions introduced in GLX 1.1 */
         { (PRFuncPtr*) &xQueryExtensionsStringInternal, { "glXQueryExtensionsString", nullptr } },
         { (PRFuncPtr*) &xGetClientStringInternal, { "glXGetClientString", nullptr } },
         { (PRFuncPtr*) &xQueryServerStringInternal, { "glXQueryServerString", nullptr } },
         { nullptr, { nullptr } }
     };
     GLLibraryLoader::SymLoadStruct symbols13[] = {
         /* functions introduced in GLX 1.3 */
         { (PRFuncPtr*) &xChooseFBConfigInternal, { "glXChooseFBConfig", nullptr } },
         { (PRFuncPtr*) &xGetFBConfigAttribInternal, { "glXGetFBConfigAttrib", nullptr } },
         // WARNING: xGetFBConfigs not set in symbols13_ext
         { (PRFuncPtr*) &xGetFBConfigsInternal, { "glXGetFBConfigs", nullptr } },
         // WARNING: symbols13_ext sets xCreateGLXPixmapWithConfig instead
         { (PRFuncPtr*) &xCreatePixmapInternal, { "glXCreatePixmap", nullptr } },
         { (PRFuncPtr*) &xDestroyPixmapInternal, { "glXDestroyPixmap", nullptr } },
         { (PRFuncPtr*) &xCreateNewContextInternal, { "glXCreateNewContext", nullptr } },
         { nullptr, { nullptr } }
     };
     GLLibraryLoader::SymLoadStruct symbols13_ext[] = {
         /* extension equivalents for functions introduced in GLX 1.3 */
         // GLX_SGIX_fbconfig extension
         { (PRFuncPtr*) &xChooseFBConfigInternal, { "glXChooseFBConfigSGIX", nullptr } },
         { (PRFuncPtr*) &xGetFBConfigAttribInternal, { "glXGetFBConfigAttribSGIX", nullptr } },
         // WARNING: no xGetFBConfigs equivalent in extensions
         // WARNING: different from symbols13:
         { (PRFuncPtr*) &xCreateGLXPixmapWithConfigInternal, { "glXCreateGLXPixmapWithConfigSGIX", nullptr } },
         { (PRFuncPtr*) &xDestroyPixmapInternal, { "glXDestroyGLXPixmap", nullptr } }, // not from ext
         { (PRFuncPtr*) &xCreateNewContextInternal, { "glXCreateContextWithConfigSGIX", nullptr } },
         { nullptr, { nullptr } }
     };
     GLLibraryLoader::SymLoadStruct symbols14[] = {
         /* functions introduced in GLX 1.4 */
         { (PRFuncPtr*) &xGetProcAddressInternal, { "glXGetProcAddress", nullptr } },
         { nullptr, { nullptr } }
     };
     GLLibraryLoader::SymLoadStruct symbols14_ext[] = {
         /* extension equivalents for functions introduced in GLX 1.4 */
         // GLX_ARB_get_proc_address extension
         { (PRFuncPtr*) &xGetProcAddressInternal, { "glXGetProcAddressARB", nullptr } },
         { nullptr, { nullptr } }
     };
     GLLibraryLoader::SymLoadStruct symbols_texturefrompixmap[] = {
         { (PRFuncPtr*) &xBindTexImageInternal, { "glXBindTexImageEXT", nullptr } },
         { (PRFuncPtr*) &xReleaseTexImageInternal, { "glXReleaseTexImageEXT", nullptr } },
         { nullptr, { nullptr } }
     };
     GLLibraryLoader::SymLoadStruct symbols_robustness[] = {
         { (PRFuncPtr*) &xCreateContextAttribsInternal, { "glXCreateContextAttribsARB", nullptr } },
         { nullptr, { nullptr } }
     };
     if (!GLLibraryLoader::LoadSymbols(mOGLLibrary, &symbols[0])) {
         NS_WARNING("Couldn't find required entry point in OpenGL shared library");
         return false;
     }
     Display *display = DefaultXDisplay();
     int screen = DefaultScreen(display);
     if (!xQueryVersion(display, &mGLXMajorVersion, &mGLXMinorVersion)) {
         mGLXMajorVersion = 0;
         mGLXMinorVersion = 0;
         return false;
     }
     if (!GLXVersionCheck(1, 1))
         // Not possible to query for extensions.
         return false;
     const char *clientVendor = xGetClientString(display, LOCAL_GLX_VENDOR);
     const char *serverVendor = xQueryServerString(display, screen, LOCAL_GLX_VENDOR);
     const char *extensionsStr = xQueryExtensionsString(display, screen);
     GLLibraryLoader::SymLoadStruct *sym13;
     if (!GLXVersionCheck(1, 3)) {
         // Even if we don't have 1.3, we might have equivalent extensions
         // (as on the Intel X server).
         if (!HasExtension(extensionsStr, "GLX_SGIX_fbconfig")) {
             return false;
         }
         sym13 = symbols13_ext;
     } else {
         sym13 = symbols13;
     }
     if (!GLLibraryLoader::LoadSymbols(mOGLLibrary, sym13)) {
         NS_WARNING("Couldn't find required entry point in OpenGL shared library");
         return false;
     }
     GLLibraryLoader::SymLoadStruct *sym14;
     if (!GLXVersionCheck(1, 4)) {
         // Even if we don't have 1.4, we might have equivalent extensions
         // (as on the Intel X server).
         if (!HasExtension(extensionsStr, "GLX_ARB_get_proc_address")) {
             return false;
         }
         sym14 = symbols14_ext;
     } else {
         sym14 = symbols14;
     }
     if (!GLLibraryLoader::LoadSymbols(mOGLLibrary, sym14)) {
         NS_WARNING("Couldn't find required entry point in OpenGL shared library");
         return false;
     }
     if (HasExtension(extensionsStr, "GLX_EXT_texture_from_pixmap") &&
         GLLibraryLoader::LoadSymbols(mOGLLibrary, symbols_texturefrompixmap,
                                          (GLLibraryLoader::PlatformLookupFunction)&xGetProcAddress))
     {
 #ifdef MOZ_WIDGET_GTK
         mUseTextureFromPixmap = gfxPlatformGtk::GetPlatform()->UseXRender();
 #else
         mUseTextureFromPixmap = true;
 #endif
     } else {
         mUseTextureFromPixmap = false;
         NS_WARNING("Texture from pixmap disabled");
     }
     if (HasExtension(extensionsStr, "GLX_ARB_create_context_robustness") &&
         GLLibraryLoader::LoadSymbols(mOGLLibrary, symbols_robustness)) {
         mHasRobustness = true;
     }
     mIsATI = serverVendor && DoesStringMatch(serverVendor, "ATI");
     mIsNVIDIA = serverVendor && DoesStringMatch(serverVendor, "NVIDIA Corporation");
     mClientIsMesa = clientVendor && DoesStringMatch(clientVendor, "Mesa");
     mInitialized = true;
     return true;
 }
 bool
 GLXLibrary::SupportsTextureFromPixmap(gfxASurface* aSurface)
 {
     if (!EnsureInitialized()) {
         return false;
     }
     if (aSurface->GetType() != gfxSurfaceType::Xlib || !mUseTextureFromPixmap) {
         return false;
     }
     return true;
 }
 GLXPixmap
 GLXLibrary::CreatePixmap(gfxASurface* aSurface)
 {
     if (!SupportsTextureFromPixmap(aSurface)) {
         return None;
     }
     gfxXlibSurface *xs = static_cast<gfxXlibSurface*>(aSurface);
     const XRenderPictFormat *format = xs->XRenderFormat();
     if (!format || format->type != PictTypeDirect) {
         return None;
     }
     const XRenderDirectFormat& direct = format->direct;
     int alphaSize = FloorLog2(direct.alphaMask + 1);
     NS_ASSERTION((1 << alphaSize) - 1 == direct.alphaMask,
                  "Unexpected render format with non-adjacent alpha bits");
     int attribs[] = { LOCAL_GLX_DOUBLEBUFFER, False,
                       LOCAL_GLX_DRAWABLE_TYPE, LOCAL_GLX_PIXMAP_BIT,
                       LOCAL_GLX_ALPHA_SIZE, alphaSize,
                       (alphaSize ? LOCAL_GLX_BIND_TO_TEXTURE_RGBA_EXT
                        : LOCAL_GLX_BIND_TO_TEXTURE_RGB_EXT), True,
                       LOCAL_GLX_RENDER_TYPE, LOCAL_GLX_RGBA_BIT,
                       None };
     int numConfigs = 0;
     Display *display = xs->XDisplay();
     int xscreen = DefaultScreen(display);
     ScopedXFree<GLXFBConfig> cfgs(xChooseFBConfig(display,
                                                   xscreen,
                                                   attribs,
                                                   &numConfigs));
     // Find an fbconfig that matches the pixel format used on the Pixmap.
     int matchIndex = -1;
     unsigned long redMask =
         static_cast<unsigned long>(direct.redMask) << direct.red;
     unsigned long greenMask =
         static_cast<unsigned long>(direct.greenMask) << direct.green;
     unsigned long blueMask =
         static_cast<unsigned long>(direct.blueMask) << direct.blue;
     // This is true if the Pixmap has bits for alpha or unused bits.
     bool haveNonColorBits =
         ~(redMask | greenMask | blueMask) != -1UL << format->depth;
     for (int i = 0; i < numConfigs; i++) {
         int id = None;
         sGLXLibrary.xGetFBConfigAttrib(display, cfgs[i], LOCAL_GLX_VISUAL_ID, &id);
         Visual *visual;
         int depth;
         FindVisualAndDepth(display, id, &visual, &depth);
         if (!visual ||
             visual->c_class != TrueColor ||
             visual->red_mask != redMask ||
             visual->green_mask != greenMask ||
             visual->blue_mask != blueMask ) {
             continue;
         }
         // Historically Xlib Visuals did not try to represent an alpha channel
         // and there was no means to use an alpha channel on a Pixmap.  The
         // Xlib Visual from the fbconfig was not intended to have any
         // information about alpha bits.
         //
         // Since then, RENDER has added formats for 32 bit depth Pixmaps.
         // Some of these formats have bits for alpha and some have unused
         // bits.
         //
         // Then the Composite extension added a 32 bit depth Visual intended
         // for Windows with an alpha channel, so bits not in the visual color
         // masks were expected to be treated as alpha bits.
         //
         // Usually GLX counts only color bits in the Visual depth, but the
         // depth of Composite's ARGB Visual includes alpha bits.  However,
         // bits not in the color masks are not necessarily alpha bits because
         // sometimes (NVIDIA) 32 bit Visuals are added for fbconfigs with 32
         // bit BUFFER_SIZE but zero alpha bits and 24 color bits (NVIDIA
         // again).
         //
         // This checks that the depth matches in one of the two ways.
         // NVIDIA now forces format->depth == depth so only the first way
         // is checked for NVIDIA
         if (depth != format->depth &&
             (mIsNVIDIA || depth != format->depth - alphaSize) ) {
             continue;
         }
         // If all bits of the Pixmap are color bits and the Pixmap depth
         // matches the depth of the fbconfig visual, then we can assume that
         // the driver will do whatever is necessary to ensure that any
         // GLXPixmap alpha bits are treated as set.  We can skip the
         // ALPHA_SIZE check in this situation.  We need to skip this check for
         // situations (ATI) where there are no fbconfigs without alpha bits.
         //
         // glXChooseFBConfig should prefer configs with smaller
         // LOCAL_GLX_BUFFER_SIZE, so we should still get zero alpha bits if
         // available, except perhaps with NVIDIA drivers where buffer size is
         // not the specified sum of the component sizes.
         if (haveNonColorBits) {
             // There are bits in the Pixmap format that haven't been matched
             // against the fbconfig visual.  These bits could either represent
             // alpha or be unused, so just check that the number of alpha bits
             // matches.
             int size = 0;
             sGLXLibrary.xGetFBConfigAttrib(display, cfgs[i],
                                            LOCAL_GLX_ALPHA_SIZE, &size);
             if (size != alphaSize) {
                 continue;
             }
         }
         matchIndex = i;
         break;
     }
     if (matchIndex == -1) {
         // GLX can't handle A8 surfaces, so this is not really unexpected. The
         // caller should deal with this situation.
         NS_WARN_IF_FALSE(format->depth == 8,
                          "[GLX] Couldn't find a FBConfig matching Pixmap format");
         return None;
     }
     int pixmapAttribs[] = { LOCAL_GLX_TEXTURE_TARGET_EXT, LOCAL_GLX_TEXTURE_2D_EXT,
                             LOCAL_GLX_TEXTURE_FORMAT_EXT,
                             (alphaSize ? LOCAL_GLX_TEXTURE_FORMAT_RGBA_EXT
                              : LOCAL_GLX_TEXTURE_FORMAT_RGB_EXT),
                             None};
     GLXPixmap glxpixmap = xCreatePixmap(display,
                                         cfgs[matchIndex],
                                         xs->XDrawable(),
                                         pixmapAttribs);
     return glxpixmap;
 }
 void
 GLXLibrary::DestroyPixmap(Display* aDisplay, GLXPixmap aPixmap)
 {
     if (!mUseTextureFromPixmap) {
         return;
     }
     xDestroyPixmap(aDisplay, aPixmap);
 }
 void
 GLXLibrary::BindTexImage(Display* aDisplay, GLXPixmap aPixmap)
 {
     if (!mUseTextureFromPixmap) {
         return;
     }
     // Make sure all X drawing to the surface has finished before binding to a texture.
     if (mClientIsMesa) {
         // Using XSync instead of Mesa's glXWaitX, because its glxWaitX is a
         // noop when direct rendering unless the current drawable is a
         // single-buffer window.
         FinishX(aDisplay);
     } else {
         xWaitX();
     }
     xBindTexImage(aDisplay, aPixmap, LOCAL_GLX_FRONT_LEFT_EXT, nullptr);
 }
 void
 GLXLibrary::ReleaseTexImage(Display* aDisplay, GLXPixmap aPixmap)
 {
     if (!mUseTextureFromPixmap) {
         return;
     }
     xReleaseTexImage(aDisplay, aPixmap, LOCAL_GLX_FRONT_LEFT_EXT);
 }
 void
 GLXLibrary::UpdateTexImage(Display* aDisplay, GLXPixmap aPixmap)
 {
     // NVIDIA drivers don't require a rebind of the pixmap in order
     // to display an updated image, and it's faster not to do it.
     if (mIsNVIDIA) {
         xWaitX();
         return;
     }
     ReleaseTexImage(aDisplay, aPixmap);
     BindTexImage(aDisplay, aPixmap);
 }
 #ifdef DEBUG
 static int (*sOldErrorHandler)(Display *, XErrorEvent *);
 ScopedXErrorHandler::ErrorEvent sErrorEvent;
 static int GLXErrorHandler(Display *display, XErrorEvent *ev)
 {
     if (!sErrorEvent.mError.error_code) {
         sErrorEvent.mError = *ev;
     }
     return 0;
 }
 void
 GLXLibrary::BeforeGLXCall()
 {
     if (mDebug) {
         sOldErrorHandler = XSetErrorHandler(GLXErrorHandler);
     }
 }
 void
 GLXLibrary::AfterGLXCall()
 {
     if (mDebug) {
         FinishX(DefaultXDisplay());
         if (sErrorEvent.mError.error_code) {
             char buffer[2048];
             XGetErrorText(DefaultXDisplay(), sErrorEvent.mError.error_code, buffer, sizeof(buffer));
             printf_stderr("X ERROR: %s (%i) - Request: %i.%i, Serial: %i",
                           buffer,
                           sErrorEvent.mError.error_code,
                           sErrorEvent.mError.request_code,
                           sErrorEvent.mError.minor_code,
                           sErrorEvent.mError.serial);
             NS_ABORT();
         }
         XSetErrorHandler(sOldErrorHandler);
     }
 }
 #define BEFORE_GLX_CALL do {           \
     sGLXLibrary.BeforeGLXCall();       \
 } while (0)
 #define AFTER_GLX_CALL do {            \
     sGLXLibrary.AfterGLXCall();        \
 } while (0)
 #else
 #define BEFORE_GLX_CALL do { } while(0)
 #define AFTER_GLX_CALL do { } while(0)
 #endif
 void
 GLXLibrary::xDestroyContext(Display* display, GLXContext context)
 {
     BEFORE_GLX_CALL;
     xDestroyContextInternal(display, context);
     AFTER_GLX_CALL;
 }
 Bool
 GLXLibrary::xMakeCurrent(Display* display,
                          GLXDrawable drawable,
                          GLXContext context)
 {
     BEFORE_GLX_CALL;
     Bool result = xMakeCurrentInternal(display, drawable, context);
     AFTER_GLX_CALL;
     return result;
 }
 GLXContext
 GLXLibrary::xGetCurrentContext()
 {
     BEFORE_GLX_CALL;
     GLXContext result = xGetCurrentContextInternal();
     AFTER_GLX_CALL;
     return result;
 }
 /* static */ void*
 GLXLibrary::xGetProcAddress(const char *procName)
 {
     BEFORE_GLX_CALL;
     void* result = sGLXLibrary.xGetProcAddressInternal(procName);
     AFTER_GLX_CALL;
     return result;
 }
 GLXFBConfig*
 GLXLibrary::xChooseFBConfig(Display* display,
                             int screen,
                             const int *attrib_list,
                             int *nelements)
 {
     BEFORE_GLX_CALL;
     GLXFBConfig* result = xChooseFBConfigInternal(display, screen, attrib_list, nelements);
     AFTER_GLX_CALL;
     return result;
 }
 GLXFBConfig*
 GLXLibrary::xGetFBConfigs(Display* display,
                           int screen,
                           int *nelements)
 {
     BEFORE_GLX_CALL;
     GLXFBConfig* result = xGetFBConfigsInternal(display, screen, nelements);
     AFTER_GLX_CALL;
     return result;
 }
 GLXContext
 GLXLibrary::xCreateNewContext(Display* display,
                               GLXFBConfig config,
                               int render_type,
                               GLXContext share_list,
                               Bool direct)
 {
     BEFORE_GLX_CALL;
     GLXContext result = xCreateNewContextInternal(display, config,
                                                   render_type,
                                                   share_list, direct);
     AFTER_GLX_CALL;
     return result;
 }
 int
 GLXLibrary::xGetFBConfigAttrib(Display *display,
                                GLXFBConfig config,
                                int attribute,
                                int *value)
 {
     BEFORE_GLX_CALL;
     int result = xGetFBConfigAttribInternal(display, config,
                                             attribute, value);
     AFTER_GLX_CALL;
     return result;
 }
 void
 GLXLibrary::xSwapBuffers(Display *display, GLXDrawable drawable)
 {
     BEFORE_GLX_CALL;
     xSwapBuffersInternal(display, drawable);
     AFTER_GLX_CALL;
 }
 const char *
 GLXLibrary::xQueryExtensionsString(Display *display,
                                    int screen)
 {
     BEFORE_GLX_CALL;
     const char *result = xQueryExtensionsStringInternal(display, screen);
     AFTER_GLX_CALL;
     return result;
 }
 const char *
 GLXLibrary::xGetClientString(Display *display,
                              int screen)
 {
     BEFORE_GLX_CALL;
     const char *result = xGetClientStringInternal(display, screen);
     AFTER_GLX_CALL;
     return result;
 }
 const char *
 GLXLibrary::xQueryServerString(Display *display,
                                int screen, int name)
 {
     BEFORE_GLX_CALL;
     const char *result = xQueryServerStringInternal(display, screen, name);
     AFTER_GLX_CALL;
     return result;
 }
 GLXPixmap
 GLXLibrary::xCreatePixmap(Display *display,
                           GLXFBConfig config,
                           Pixmap pixmap,
                           const int *attrib_list)
 {
     BEFORE_GLX_CALL;
     GLXPixmap result = xCreatePixmapInternal(display, config,
                                              pixmap, attrib_list);
     AFTER_GLX_CALL;
     return result;
 }
 GLXPixmap
 GLXLibrary::xCreateGLXPixmapWithConfig(Display *display,
                                        GLXFBConfig config,
                                        Pixmap pixmap)
 {
     BEFORE_GLX_CALL;
     GLXPixmap result = xCreateGLXPixmapWithConfigInternal(display, config, pixmap);
     AFTER_GLX_CALL;
     return result;
 }
 void
 GLXLibrary::xDestroyPixmap(Display *display, GLXPixmap pixmap)
 {
     BEFORE_GLX_CALL;
     xDestroyPixmapInternal(display, pixmap);
     AFTER_GLX_CALL;
 }
 Bool
 GLXLibrary::xQueryVersion(Display *display,
                           int *major,
                           int *minor)
 {
     BEFORE_GLX_CALL;
     Bool result = xQueryVersionInternal(display, major, minor);
     AFTER_GLX_CALL;
     return result;
 }
 void
 GLXLibrary::xBindTexImage(Display *display,
                           GLXDrawable drawable,
                           int buffer,
                           const int *attrib_list)
 {
     BEFORE_GLX_CALL;
     xBindTexImageInternal(display, drawable, buffer, attrib_list);
     AFTER_GLX_CALL;
 }
 void
 GLXLibrary::xReleaseTexImage(Display *display,
                              GLXDrawable drawable,
                              int buffer)
 {
     BEFORE_GLX_CALL;
     xReleaseTexImageInternal(display, drawable, buffer);
     AFTER_GLX_CALL;
 }
 void
 GLXLibrary::xWaitGL()
 {
     BEFORE_GLX_CALL;
     xWaitGLInternal();
     AFTER_GLX_CALL;
 }
 void
 GLXLibrary::xWaitX()
 {
     BEFORE_GLX_CALL;
     xWaitXInternal();
     AFTER_GLX_CALL;
 }
 GLXContext
 GLXLibrary::xCreateContextAttribs(Display* display,
                                   GLXFBConfig config,
                                   GLXContext share_list,
                                   Bool direct,
                                   const int* attrib_list)
 {
     BEFORE_GLX_CALL;
     GLXContext result = xCreateContextAttribsInternal(display,
                                                       config,
                                                       share_list,
                                                       direct,
                                                       attrib_list);
     AFTER_GLX_CALL;
     return result;
 }
 already_AddRefed<GLContextGLX>
 GLContextGLX::CreateGLContext(
                   const SurfaceCaps& caps,
                   GLContextGLX* shareContext,
                   bool isOffscreen,
                   Display* display,
                   GLXDrawable drawable,
                   GLXFBConfig cfg,
                   bool deleteDrawable,
                   gfxXlibSurface* pixmap)
 {
     GLXLibrary& glx = sGLXLibrary;
     int db = 0;
     int err = glx.xGetFBConfigAttrib(display, cfg,
                                       LOCAL_GLX_DOUBLEBUFFER, &db);
     if (LOCAL_GLX_BAD_ATTRIBUTE != err) {
 #ifdef DEBUG
         if (DebugMode()) {
             printf("[GLX] FBConfig is %sdouble-buffered\n", db ? "" : "not ");
         }
 #endif
     }
     GLXContext context;
     nsRefPtr<GLContextGLX> glContext;
     bool error;
     ScopedXErrorHandler xErrorHandler;
 TRY_AGAIN_NO_SHARING:
     error = false;
     GLXContext glxContext = shareContext ? shareContext->mContext : nullptr;
     if (glx.HasRobustness()) {
         int attrib_list[] = {
             LOCAL_GL_CONTEXT_FLAGS_ARB, LOCAL_GL_CONTEXT_ROBUST_ACCESS_BIT_ARB,
             LOCAL_GL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, LOCAL_GL_LOSE_CONTEXT_ON_RESET_ARB,
 ,
         };
         context = glx.xCreateContextAttribs(
             display,
             cfg,
             glxContext,
             True,
             attrib_list);
     } else {
         context = glx.xCreateNewContext(
             display,
             cfg,
             LOCAL_GLX_RGBA_TYPE,
             glxContext,
             True);
     }
     if (context) {
         glContext = new GLContextGLX(caps,
                                       shareContext,
                                       isOffscreen,
                                       display,
                                       drawable,
                                       context,
                                       deleteDrawable,
                                       db,
                                       pixmap);
         if (!glContext->Init())
             error = true;
     } else {
         error = true;
     }
     error |= xErrorHandler.SyncAndGetError(display);
     if (error) {
         if (shareContext) {
             shareContext = nullptr;
             goto TRY_AGAIN_NO_SHARING;
         }
         NS_WARNING("Failed to create GLXContext!");
         glContext = nullptr; // note: this must be done while the graceful X error handler is set,
                             // because glxMakeCurrent can give a GLXBadDrawable error
     }
     return glContext.forget();
 }
 GLContextGLX::~GLContextGLX()
 {
     MarkDestroyed();
     // Wrapped context should not destroy glxContext/Surface
     if (!mOwnsContext) {
         return;
     }
     // see bug 659842 comment 76
 #ifdef DEBUG
     bool success =
 #endif
     mGLX->xMakeCurrent(mDisplay, None, nullptr);
     NS_ABORT_IF_FALSE(success,
         "glXMakeCurrent failed to release GL context before we call glXDestroyContext!");
     mGLX->xDestroyContext(mDisplay, mContext);
     if (mDeleteDrawable) {
         mGLX->xDestroyPixmap(mDisplay, mDrawable);
     }
 }
 bool
 GLContextGLX::Init()
 {
     SetupLookupFunction();
     if (!InitWithPrefix("gl", true)) {
         return false;
     }
     if (!IsExtensionSupported(EXT_framebuffer_object))
         return false;
     return true;
 }
 bool
 GLContextGLX::MakeCurrentImpl(bool aForce)
 {
     bool succeeded = true;
     // With the ATI FGLRX driver, glxMakeCurrent is very slow even when the context doesn't change.
     // (This is not the case with other drivers such as NVIDIA).
     // So avoid calling it more than necessary. Since GLX documentation says that:
     //     "glXGetCurrentContext returns client-side information.
     //      It does not make a round trip to the server."
     // I assume that it's not worth using our own TLS slot here.
     if (aForce || mGLX->xGetCurrentContext() != mContext) {
         succeeded = mGLX->xMakeCurrent(mDisplay, mDrawable, mContext);
         NS_ASSERTION(succeeded, "Failed to make GL context current!");
     }
     return succeeded;
 }
 bool
 GLContextGLX::IsCurrent() {
     return mGLX->xGetCurrentContext() == mContext;
 }
 bool
 GLContextGLX::SetupLookupFunction()
 {
     mLookupFunc = (PlatformLookupFunction)&GLXLibrary::xGetProcAddress;
     return true;
 }
 bool
 GLContextGLX::IsDoubleBuffered() const
 {
     return mDoubleBuffered;
 }
 bool
 GLContextGLX::SupportsRobustness() const
 {
     return mGLX->HasRobustness();
 }
 bool
 GLContextGLX::SwapBuffers()
 {
     if (!mDoubleBuffered)
         return false;
     mGLX->xSwapBuffers(mDisplay, mDrawable);
     mGLX->xWaitGL();
     return true;
 }
 GLContextGLX::GLContextGLX(
                   const SurfaceCaps& caps,
                   GLContext* shareContext,
                   bool isOffscreen,
                   Display *aDisplay,
                   GLXDrawable aDrawable,
                   GLXContext aContext,
                   bool aDeleteDrawable,
                   bool aDoubleBuffered,
                   gfxXlibSurface *aPixmap)
     : GLContext(caps, shareContext, isOffscreen),//aDeleteDrawable ? true : false, aShareContext, ),
       mContext(aContext),
       mDisplay(aDisplay),
       mDrawable(aDrawable),
       mDeleteDrawable(aDeleteDrawable),
       mDoubleBuffered(aDoubleBuffered),
       mGLX(&sGLXLibrary),
       mPixmap(aPixmap),
       mOwnsContext(true)
 {
     MOZ_ASSERT(mGLX);
     // See 899855
     SetProfileVersion(ContextProfile::OpenGLCompatibility, 200);
 }
 static GLContextGLX *
 GetGlobalContextGLX()
 {
     return static_cast<GLContextGLX*>(GLContextProviderGLX::GetGlobalContext());
 }
 static bool
 AreCompatibleVisuals(Visual *one, Visual *two)
 {
     if (one->c_class != two->c_class) {
         return false;
     }
     if (one->red_mask != two->red_mask ||
         one->green_mask != two->green_mask ||
         one->blue_mask != two->blue_mask) {
         return false;
     }
     if (one->bits_per_rgb != two->bits_per_rgb) {
         return false;
     }
     return true;
 }
 static StaticRefPtr<GLContext> gGlobalContext;
 already_AddRefed<GLContext>
 GLContextProviderGLX::CreateWrappingExisting(void* aContext, void* aSurface)
 {
     if (!sGLXLibrary.EnsureInitialized()) {
         return nullptr;
     }
     if (aContext && aSurface) {
         SurfaceCaps caps = SurfaceCaps::Any();
         nsRefPtr<GLContextGLX> glContext =
             new GLContextGLX(caps,
                              nullptr, // SharedContext
                              false, // Offscreen
                              (Display*)DefaultXDisplay(), // Display
                              (GLXDrawable)aSurface, (GLXContext)aContext,
                              false, // aDeleteDrawable,
                              true,
                              (gfxXlibSurface*)nullptr);
         glContext->mOwnsContext = false;
         gGlobalContext = glContext;
         return glContext.forget();
     }
     return nullptr;
 }
 already_AddRefed<GLContext>
 GLContextProviderGLX::CreateForWindow(nsIWidget *aWidget)
 {
     if (!sGLXLibrary.EnsureInitialized()) {
         return nullptr;
     }
     // Currently, we take whatever Visual the window already has, and
     // try to create an fbconfig for that visual.  This isn't
     // necessarily what we want in the long run; an fbconfig may not
     // be available for the existing visual, or if it is, the GL
     // performance might be suboptimal.  But using the existing visual
     // is a relatively safe intermediate step.
     Display *display = (Display*)aWidget->GetNativeData(NS_NATIVE_DISPLAY);
     if (!display) {
         NS_ERROR("X Display required for GLX Context provider");
         return nullptr;
     }
     int xscreen = DefaultScreen(display);
     Window window = GET_NATIVE_WINDOW(aWidget);
     int numConfigs;
     ScopedXFree<GLXFBConfig> cfgs;
     if (sGLXLibrary.IsATI() ||
         !sGLXLibrary.GLXVersionCheck(1, 3)) {
         const int attribs[] = {
             LOCAL_GLX_DOUBLEBUFFER, False,
 
         };
         cfgs = sGLXLibrary.xChooseFBConfig(display,
                                            xscreen,
                                            attribs,
                                            &numConfigs);
     } else {
         cfgs = sGLXLibrary.xGetFBConfigs(display,
                                          xscreen,
                                          &numConfigs);
     }
     if (!cfgs) {
         NS_WARNING("[GLX] glXGetFBConfigs() failed");
         return nullptr;
     }
     NS_ASSERTION(numConfigs > 0, "No FBConfigs found!");
     // XXX the visual ID is almost certainly the LOCAL_GLX_FBCONFIG_ID, so
     // we could probably do this first and replace the glXGetFBConfigs
     // with glXChooseConfigs.  Docs are sparklingly clear as always.
     XWindowAttributes widgetAttrs;
     if (!XGetWindowAttributes(display, window, &widgetAttrs)) {
         NS_WARNING("[GLX] XGetWindowAttributes() failed");
         return nullptr;
     }
     const VisualID widgetVisualID = XVisualIDFromVisual(widgetAttrs.visual);
 #ifdef DEBUG
     printf("[GLX] widget has VisualID 0x%lx\n", widgetVisualID);
 #endif
     int matchIndex = -1;
     for (int i = 0; i < numConfigs; i++) {
         int visid = None;
         sGLXLibrary.xGetFBConfigAttrib(display, cfgs[i], LOCAL_GLX_VISUAL_ID, &visid);
         if (!visid) {
             continue;
         }
         if (sGLXLibrary.IsATI()) {
             int depth;
             Visual *visual;
             FindVisualAndDepth(display, visid, &visual, &depth);
             if (depth == widgetAttrs.depth &&
                 AreCompatibleVisuals(widgetAttrs.visual, visual)) {
                 matchIndex = i;
                 break;
             }
         } else {
             if (widgetVisualID == static_cast<VisualID>(visid)) {
                 matchIndex = i;
                 break;
             }
         }
     }
     if (matchIndex == -1) {
         NS_WARNING("[GLX] Couldn't find a FBConfig matching widget visual");
         return nullptr;
     }
     GLContextGLX *shareContext = GetGlobalContextGLX();
     SurfaceCaps caps = SurfaceCaps::Any();
     nsRefPtr<GLContextGLX> glContext = GLContextGLX::CreateGLContext(caps,
                                                                      shareContext,
                                                                      false,
                                                                      display,
                                                                      window,
                                                                      cfgs[matchIndex],
                                                                      false);
     return glContext.forget();
 }
 static already_AddRefed<GLContextGLX>
 CreateOffscreenPixmapContext(const gfxIntSize& size)
 {
     GLXLibrary& glx = sGLXLibrary;
     if (!glx.EnsureInitialized()) {
         return nullptr;
     }
     Display *display = DefaultXDisplay();
     int xscreen = DefaultScreen(display);
     int attribs[] = {
         LOCAL_GLX_DRAWABLE_TYPE, LOCAL_GLX_PIXMAP_BIT,
         LOCAL_GLX_X_RENDERABLE, True,
 
     };
     int numConfigs = 0;
     ScopedXFree<GLXFBConfig> cfgs;
     cfgs = glx.xChooseFBConfig(display,
                                xscreen,
                                attribs,
                                &numConfigs);
     if (!cfgs) {
         return nullptr;
     }
     MOZ_ASSERT(numConfigs > 0,
                "glXChooseFBConfig() failed to match our requested format and violated its spec!");
     int visid = None;
     int chosenIndex = 0;
     for (int i = 0; i < numConfigs; ++i) {
         int dtype;
         if (glx.xGetFBConfigAttrib(display, cfgs[i], LOCAL_GLX_DRAWABLE_TYPE, &dtype) != Success
             || !(dtype & LOCAL_GLX_PIXMAP_BIT))
         {
             continue;
         }
         if (glx.xGetFBConfigAttrib(display, cfgs[i], LOCAL_GLX_VISUAL_ID, &visid) != Success
             || visid == 0)
         {
             continue;
         }
         chosenIndex = i;
         break;
     }
     if (!visid) {
         NS_WARNING("glXChooseFBConfig() didn't give us any configs with visuals!");
         return nullptr;
     }
     Visual *visual;
     int depth;
     FindVisualAndDepth(display, visid, &visual, &depth);
     ScopedXErrorHandler xErrorHandler;
     GLXPixmap glxpixmap = 0;
     bool error = false;
     gfxIntSize dummySize(16, 16);
     nsRefPtr<gfxXlibSurface> xsurface = gfxXlibSurface::Create(DefaultScreenOfDisplay(display),
                                                                visual,
                                                                dummySize);
     if (xsurface->CairoStatus() != 0) {
         error = true;
         goto DONE_CREATING_PIXMAP;
     }
     // Handle slightly different signature between glXCreatePixmap and
     // its pre-GLX-1.3 extension equivalent (though given the ABI, we
     // might not need to).
     if (glx.GLXVersionCheck(1, 3)) {
         glxpixmap = glx.xCreatePixmap(display,
                                           cfgs[chosenIndex],
                                           xsurface->XDrawable(),
                                           nullptr);
     } else {
         glxpixmap = glx.xCreateGLXPixmapWithConfig(display,
                                                        cfgs[chosenIndex],
                                                        xsurface->
                                                        XDrawable());
     }
     if (glxpixmap == 0) {
         error = true;
     }
 DONE_CREATING_PIXMAP:
     nsRefPtr<GLContextGLX> glContext;
     bool serverError = xErrorHandler.SyncAndGetError(display);
     if (!error && // earlier recorded error
         !serverError)
     {
         // We might have an alpha channel, but it doesn't matter.
         SurfaceCaps dummyCaps = SurfaceCaps::Any();
         GLContextGLX* shareContext = GetGlobalContextGLX();
         glContext = GLContextGLX::CreateGLContext(dummyCaps,
                                                   shareContext,
                                                   true,
                                                   display,
                                                   glxpixmap,
                                                   cfgs[chosenIndex],
                                                   true,
                                                   xsurface);
     }
     return glContext.forget();
 }
 already_AddRefed<GLContext>
 GLContextProviderGLX::CreateOffscreen(const gfxIntSize& size,
                                       const SurfaceCaps& caps)
 {
     gfxIntSize dummySize = gfxIntSize(16, 16);
     nsRefPtr<GLContextGLX> glContext =
         CreateOffscreenPixmapContext(dummySize);
     if (!glContext)
         return nullptr;
     if (!glContext->InitOffscreen(ToIntSize(size), caps))
         return nullptr;
     return glContext.forget();
 }
 GLContext*
 GLContextProviderGLX::GetGlobalContext()
 {
     static bool checkedContextSharing = false;
     static bool useContextSharing = false;
     if (!checkedContextSharing) {
         useContextSharing = getenv("MOZ_DISABLE_CONTEXT_SHARING_GLX") == 0;
         checkedContextSharing = true;
     }
     // TODO: get GLX context sharing to work well with multiple threads
     if (!useContextSharing) {
         return nullptr;
     }
     static bool triedToCreateContext = false;
     if (!triedToCreateContext && !gGlobalContext) {
         triedToCreateContext = true;
         gfxIntSize dummySize = gfxIntSize(16, 16);
         // StaticPtr doesn't support assignments from already_AddRefed,
         // so use a temporary nsRefPtr to make the reference counting
         // fall out correctly.
         nsRefPtr<GLContext> holder = CreateOffscreenPixmapContext(dummySize);
         gGlobalContext = holder;
     }
     return gGlobalContext;
 }
 void
 GLContextProviderGLX::Shutdown()
 {
     gGlobalContext = nullptr;
 }
 } /* namespace gl */
 } /* namespace mozilla */

The Tor Browser / annotate

gfx/gl/GLContextProviderGLX.cpp@b8a032363ba2 (annotated)

gfx/gl/GLContextProviderGLX.cpp