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GLContextProviderGLX.cpp
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GLContextProviderGLX.cpp
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/* -*- 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)
#include <QWidget>
#define GET_NATIVE_WINDOW(aWidget) static_cast<QWidget*>(aWidget->GetNativeData(NS_NATIVE_SHELLWIDGET))->winId()
#endif
#include <X11/Xlib.h>
#include <X11/Xutil.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 "gfxImageSurface.h"
#include "gfxPlatform.h"
#include "GLContext.h"
#include "gfxUtils.h"
#include "gfxCrashReporterUtils.h"
#ifdef MOZ_WIDGET_GTK
#include "gfxPlatformGtk.h"
#endif
namespace mozilla {
namespace gl {
static bool gIsATI = false;
static bool gClientIsMesa = false;
static int gGLXMajorVersion = 0, gGLXMinorVersion = 0;
// Check that we have at least version aMajor.aMinor .
static inline bool
GLXVersionCheck(int aMajor, int aMinor)
{
return aMajor < gGLXMajorVersion ||
(aMajor == gGLXMajorVersion && aMinor <= gGLXMinorVersion);
}
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 (http://dri.freedesktop.org/wiki/S3TC)
PR_SetEnv("force_s3tc_enable=true");
if (!mOGLLibrary) {
// 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__
const char *libGLfilename = "libGL.so";
#else
const char *libGLfilename = "libGL.so.1";
#endif
ScopedGfxFeatureReporter reporter(libGLfilename);
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", NULL } },
{ (PRFuncPtr*) &xMakeCurrentInternal, { "glXMakeCurrent", NULL } },
{ (PRFuncPtr*) &xSwapBuffersInternal, { "glXSwapBuffers", NULL } },
{ (PRFuncPtr*) &xQueryVersionInternal, { "glXQueryVersion", NULL } },
{ (PRFuncPtr*) &xGetCurrentContextInternal, { "glXGetCurrentContext", NULL } },
{ (PRFuncPtr*) &xWaitGLInternal, { "glXWaitGL", NULL } },
{ (PRFuncPtr*) &xWaitXInternal, { "glXWaitX", NULL } },
/* functions introduced in GLX 1.1 */
{ (PRFuncPtr*) &xQueryExtensionsStringInternal, { "glXQueryExtensionsString", NULL } },
{ (PRFuncPtr*) &xGetClientStringInternal, { "glXGetClientString", NULL } },
{ (PRFuncPtr*) &xQueryServerStringInternal, { "glXQueryServerString", NULL } },
{ NULL, { NULL } }
};
GLLibraryLoader::SymLoadStruct symbols13[] = {
/* functions introduced in GLX 1.3 */
{ (PRFuncPtr*) &xChooseFBConfigInternal, { "glXChooseFBConfig", NULL } },
{ (PRFuncPtr*) &xGetFBConfigAttribInternal, { "glXGetFBConfigAttrib", NULL } },
// WARNING: xGetFBConfigs not set in symbols13_ext
{ (PRFuncPtr*) &xGetFBConfigsInternal, { "glXGetFBConfigs", NULL } },
// WARNING: symbols13_ext sets xCreateGLXPixmapWithConfig instead
{ (PRFuncPtr*) &xCreatePixmapInternal, { "glXCreatePixmap", NULL } },
{ (PRFuncPtr*) &xDestroyPixmapInternal, { "glXDestroyPixmap", NULL } },
{ (PRFuncPtr*) &xCreateNewContextInternal, { "glXCreateNewContext", NULL } },
{ NULL, { NULL } }
};
GLLibraryLoader::SymLoadStruct symbols13_ext[] = {
/* extension equivalents for functions introduced in GLX 1.3 */
// GLX_SGIX_fbconfig extension
{ (PRFuncPtr*) &xChooseFBConfigInternal, { "glXChooseFBConfigSGIX", NULL } },
{ (PRFuncPtr*) &xGetFBConfigAttribInternal, { "glXGetFBConfigAttribSGIX", NULL } },
// WARNING: no xGetFBConfigs equivalent in extensions
// WARNING: different from symbols13:
{ (PRFuncPtr*) &xCreateGLXPixmapWithConfigInternal, { "glXCreateGLXPixmapWithConfigSGIX", NULL } },
{ (PRFuncPtr*) &xDestroyPixmapInternal, { "glXDestroyGLXPixmap", NULL } }, // not from ext
{ (PRFuncPtr*) &xCreateNewContextInternal, { "glXCreateContextWithConfigSGIX", NULL } },
{ NULL, { NULL } }
};
GLLibraryLoader::SymLoadStruct symbols14[] = {
/* functions introduced in GLX 1.4 */
{ (PRFuncPtr*) &xGetProcAddressInternal, { "glXGetProcAddress", NULL } },
{ NULL, { NULL } }
};
GLLibraryLoader::SymLoadStruct symbols14_ext[] = {
/* extension equivalents for functions introduced in GLX 1.4 */
// GLX_ARB_get_proc_address extension
{ (PRFuncPtr*) &xGetProcAddressInternal, { "glXGetProcAddressARB", NULL } },
{ NULL, { NULL } }
};
GLLibraryLoader::SymLoadStruct symbols_texturefrompixmap[] = {
{ (PRFuncPtr*) &xBindTexImageInternal, { "glXBindTexImageEXT", NULL } },
{ (PRFuncPtr*) &xReleaseTexImageInternal, { "glXReleaseTexImageEXT", NULL } },
{ NULL, { NULL } }
};
GLLibraryLoader::SymLoadStruct symbols_robustness[] = {
{ (PRFuncPtr*) &xCreateContextAttribsInternal, { "glXCreateContextAttribsARB", NULL } },
{ NULL, { NULL } }
};
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, &gGLXMajorVersion, &gGLXMinorVersion)) {
gGLXMajorVersion = 0;
gGLXMinorVersion = 0;
return false;
}
if (!GLXVersionCheck(1, 1))
// Not possible to query for extensions.
return false;
const char *clientVendor = xGetClientString(display, GLX_VENDOR);
const char *serverVendor = xQueryServerString(display, screen, 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::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;
}
gIsATI = serverVendor && DoesStringMatch(serverVendor, "ATI");
gClientIsMesa = clientVendor && DoesStringMatch(clientVendor, "Mesa");
mInitialized = true;
return true;
}
bool
GLXLibrary::SupportsTextureFromPixmap(gfxASurface* aSurface)
{
if (!EnsureInitialized()) {
return false;
}
if (aSurface->GetType() != gfxASurface::SurfaceTypeXlib || !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;
PR_FLOOR_LOG2(alphaSize, direct.alphaMask + 1);
NS_ASSERTION((1 << alphaSize) - 1 == direct.alphaMask,
"Unexpected render format with non-adjacent alpha bits");
int attribs[] = { GLX_DOUBLEBUFFER, False,
GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
GLX_ALPHA_SIZE, alphaSize,
(alphaSize ? GLX_BIND_TO_TEXTURE_RGBA_EXT
: GLX_BIND_TO_TEXTURE_RGB_EXT), True,
GLX_RENDER_TYPE, 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], 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.
if (depth != format->depth && 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
// 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],
GLX_ALPHA_SIZE, &size);
if (size != alphaSize) {
continue;
}
}
matchIndex = i;
break;
}
if (matchIndex == -1) {
NS_WARNING("[GLX] Couldn't find a FBConfig matching Pixmap format");
return None;
}
int pixmapAttribs[] = { GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
GLX_TEXTURE_FORMAT_EXT,
(alphaSize ? GLX_TEXTURE_FORMAT_RGBA_EXT
: GLX_TEXTURE_FORMAT_RGB_EXT),
None};
GLXPixmap glxpixmap = xCreatePixmap(display,
cfgs[matchIndex],
xs->XDrawable(),
pixmapAttribs);
return glxpixmap;
}
void
GLXLibrary::DestroyPixmap(GLXPixmap aPixmap)
{
if (!mUseTextureFromPixmap) {
return;
}
Display *display = DefaultXDisplay();
xDestroyPixmap(display, aPixmap);
}
void
GLXLibrary::BindTexImage(GLXPixmap aPixmap)
{
if (!mUseTextureFromPixmap) {
return;
}
Display *display = DefaultXDisplay();
// Make sure all X drawing to the surface has finished before binding to a texture.
if (gClientIsMesa) {
// 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(display);
} else {
xWaitX();
}
xBindTexImage(display, aPixmap, GLX_FRONT_LEFT_EXT, NULL);
}
void
GLXLibrary::ReleaseTexImage(GLXPixmap aPixmap)
{
if (!mUseTextureFromPixmap) {
return;
}
Display *display = DefaultXDisplay();
xReleaseTexImage(display, aPixmap, GLX_FRONT_LEFT_EXT);
}
#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;
}
GLXLibrary sGLXLibrary;
class GLContextGLX : public GLContext
{
public:
static already_AddRefed<GLContextGLX>
CreateGLContext(const ContextFormat& format,
Display *display,
GLXDrawable drawable,
GLXFBConfig cfg,
GLContextGLX *shareContext,
bool deleteDrawable,
gfxXlibSurface *pixmap = nullptr)
{
int db = 0, err;
err = sGLXLibrary.xGetFBConfigAttrib(display, cfg,
GLX_DOUBLEBUFFER, &db);
if (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;
if (sGLXLibrary.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,
0,
};
context = sGLXLibrary.xCreateContextAttribs(display,
cfg,
shareContext ? shareContext->mContext : NULL,
True,
attrib_list);
} else {
context = sGLXLibrary.xCreateNewContext(display,
cfg,
GLX_RGBA_TYPE,
shareContext ? shareContext->mContext : NULL,
True);
}
if (context) {
glContext = new GLContextGLX(format,
shareContext,
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()
{
MarkDestroyed();
// see bug 659842 comment 76
#ifdef DEBUG
bool success =
#endif
sGLXLibrary.xMakeCurrent(mDisplay, None, nullptr);
NS_ABORT_IF_FALSE(success,
"glXMakeCurrent failed to release GL context before we call glXDestroyContext!");
sGLXLibrary.xDestroyContext(mDisplay, mContext);
if (mDeleteDrawable) {
sGLXLibrary.xDestroyPixmap(mDisplay, mDrawable);
}
}
GLContextType GetContextType() {
return ContextTypeGLX;
}
bool Init()
{
MakeCurrent();
SetupLookupFunction();
if (!InitWithPrefix("gl", true)) {
return false;
}
if (!IsExtensionSupported(EXT_framebuffer_object))
return false;
InitFramebuffers();
return true;
}
bool MakeCurrentImpl(bool aForce = false)
{
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 || sGLXLibrary.xGetCurrentContext() != mContext) {
succeeded = sGLXLibrary.xMakeCurrent(mDisplay, mDrawable, mContext);
NS_ASSERTION(succeeded, "Failed to make GL context current!");
}
return succeeded;
}
virtual bool IsCurrent() {
return sGLXLibrary.xGetCurrentContext() == mContext;
}
bool SetupLookupFunction()
{
mLookupFunc = (PlatformLookupFunction)&GLXLibrary::xGetProcAddress;
return true;
}
void *GetNativeData(NativeDataType aType)
{
switch(aType) {
case NativeGLContext:
return mContext;
case NativeThebesSurface:
return mPixmap;
default:
return nullptr;
}
}
bool IsDoubleBuffered()
{
return mDoubleBuffered;
}
bool SupportsRobustness()
{
return sGLXLibrary.HasRobustness();
}
bool SwapBuffers()
{
if (!mDoubleBuffered)
return false;
sGLXLibrary.xSwapBuffers(mDisplay, mDrawable);
sGLXLibrary.xWaitGL();
return true;
}
bool TextureImageSupportsGetBackingSurface()
{
return sGLXLibrary.UseTextureFromPixmap();
}
virtual already_AddRefed<TextureImage>
CreateTextureImage(const nsIntSize& aSize,
TextureImage::ContentType aContentType,
GLenum aWrapMode,
TextureImage::Flags aFlags = TextureImage::NoFlags);
private:
friend class GLContextProviderGLX;
GLContextGLX(const ContextFormat& aFormat,
GLContext *aShareContext,
Display *aDisplay,
GLXDrawable aDrawable,
GLXContext aContext,
bool aDeleteDrawable,
bool aDoubleBuffered,
gfxXlibSurface *aPixmap)
: GLContext(aFormat, aDeleteDrawable ? true : false, aShareContext),
mContext(aContext),
mDisplay(aDisplay),
mDrawable(aDrawable),
mDeleteDrawable(aDeleteDrawable),
mDoubleBuffered(aDoubleBuffered),
mPixmap(aPixmap)
{ }
GLXContext mContext;
Display *mDisplay;
GLXDrawable mDrawable;
bool mDeleteDrawable;
bool mDoubleBuffered;
nsRefPtr<gfxXlibSurface> mPixmap;
};
class TextureImageGLX : public TextureImage
{
friend already_AddRefed<TextureImage>
GLContextGLX::CreateTextureImage(const nsIntSize&,
ContentType,
GLenum,
TextureImage::Flags);
public:
virtual ~TextureImageGLX()
{
mGLContext->MakeCurrent();
mGLContext->fDeleteTextures(1, &mTexture);
sGLXLibrary.DestroyPixmap(mPixmap);
}
virtual gfxASurface* BeginUpdate(nsIntRegion& aRegion)
{
mInUpdate = true;
return mUpdateSurface;
}
virtual void EndUpdate()
{
mInUpdate = false;
}
virtual bool DirectUpdate(gfxASurface* aSurface, const nsIntRegion& aRegion, const nsIntPoint& aFrom)
{
nsRefPtr<gfxContext> ctx = new gfxContext(mUpdateSurface);
gfxUtils::ClipToRegion(ctx, aRegion);
ctx->SetSource(aSurface, aFrom);
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
ctx->Paint();
return true;
}
virtual void BindTexture(GLenum aTextureUnit)
{
mGLContext->fActiveTexture(aTextureUnit);
mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
sGLXLibrary.BindTexImage(mPixmap);
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
}
virtual void ReleaseTexture()
{
sGLXLibrary.ReleaseTexImage(mPixmap);
}
virtual already_AddRefed<gfxASurface> GetBackingSurface()
{
nsRefPtr<gfxASurface> copy = mUpdateSurface;
return copy.forget();
}
virtual bool InUpdate() const { return mInUpdate; }
virtual GLuint GetTextureID() {
return mTexture;
}
private: