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gecko-dev/gfx/gl/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)
#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
namespace mozilla {
namespace gl {
using namespace mozilla::gfx;
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,
0,
};
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,
0
};
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,
0
};
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 */
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