already_AddRefed<GLContext>
GLContextProviderGLX::CreateForNativePixmapSurface(gfxASurface *aSurface)
{
if (!sGLXLibrary.EnsureInitialized()) {
return nsnull;
}
if (aSurface->GetType() != gfxASurface::SurfaceTypeXlib) {
NS_WARNING("GLContextProviderGLX::CreateForNativePixmapSurface called with non-Xlib surface");
return nsnull;
}
nsAutoTArray<int, 20> attribs;
#define A1_(_x) do { attribs.AppendElement(_x); } while(0)
#define A2_(_x,_y) do { \
attribs.AppendElement(_x); \
attribs.AppendElement(_y); \
} while(0)
A2_(GLX_DOUBLEBUFFER, False);
A2_(GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT);
A1_(0);
int numFormats;
Display *display = DefaultXDisplay();
int xscreen = DefaultScreen(display);
ScopedXFree<GLXFBConfig> cfg(sGLXLibrary.xChooseFBConfig(display,
xscreen,
attribs.Elements(),
&numFormats));
if (!cfg) {
return nsnull;
}
NS_ASSERTION(numFormats > 0,
"glXChooseFBConfig() failed to match our requested format and violated its spec (!)");
gfxXlibSurface *xs = static_cast<gfxXlibSurface*>(aSurface);
GLXPixmap glxpixmap = sGLXLibrary.xCreatePixmap(display,
cfg[0],
xs->XDrawable(),
NULL);
nsRefPtr<GLContextGLX> glContext = GLContextGLX::CreateGLContext(ContextFormat(ContextFormat::BasicRGB24),
display,
glxpixmap,
cfg[0],
NULL,
NULL,
PR_FALSE,
xs);
if (!glContext->Init()) {
return nsnull;
}
return glContext.forget();
}
~GLContextGLX()
{
if (mOffscreenFBO) {
MakeCurrent();
DeleteOffscreenFBO();
}
sGLXLibrary.xDeleteContext(mDisplay, mContext);
if (mDeleteDrawable) {
sGLXLibrary.xDestroyPixmap(mDisplay, mDrawable);
}
}
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;
}
PRBool SwapBuffers()
{
if (!mDoubleBuffered)
return PR_FALSE;
sGLXLibrary.xSwapBuffers(mDisplay, mDrawable);
return PR_TRUE;
}
/* static */ void*
GLXLibrary::xGetProcAddress(const char *procName)
{
BEFORE_GLX_CALL;
void* result = sGLXLibrary.xGetProcAddressInternal(procName);
AFTER_GLX_CALL;
return result;
}
already_AddRefed<GLContext>
GLContextProviderGLX::CreateForWindow(nsIWidget* aWidget, bool aForceAccelerated)
{
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_COMPOSITOR_DISPLAY);
if (!display) {
NS_ERROR("X Display required for GLX Context provider");
return nullptr;
}
int xscreen = DefaultScreen(display);
Window window = GET_NATIVE_WINDOW(aWidget);
ScopedXFree<GLXFBConfig> cfgs;
GLXFBConfig config;
int visid;
if (!GLContextGLX::FindFBConfigForWindow(display, xscreen, window, &cfgs,
&config, &visid))
{
return nullptr;
}
SurfaceCaps caps = SurfaceCaps::Any();
GLContextGLX* shareContext = GetGlobalContextGLX();
RefPtr<GLContextGLX> gl = GLContextGLX::CreateGLContext(CreateContextFlags::NONE,
caps, shareContext, false,
display, window, config,
false);
return gl.forget();
}
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();
}
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: %lu",
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);
MOZ_ASSERT(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::CreateHeadless(bool)
{
gfxIntSize dummySize = gfxIntSize(16, 16);
nsRefPtr<GLContext> glContext = CreateOffscreenPixmapContext(dummySize);
if (!glContext)
return nullptr;
return glContext.forget();
}
already_AddRefed<GLContext>
GLContextProviderGLX::CreateOffscreen(const gfxIntSize& size,
const SurfaceCaps& caps,
bool requireCompatProfile)
{
nsRefPtr<GLContext> glContext = CreateHeadless(requireCompatProfile);
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 */
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;
}
static already_AddRefed<GLContextGLX>
CreateOffscreenPixmapContext(CreateContextFlags flags, const IntSize& size,
const SurfaceCaps& minCaps, nsACString* const out_failureId,
ContextProfile profile = ContextProfile::OpenGLCompatibility)
{
GLXLibrary* glx = &sGLXLibrary;
if (!glx->EnsureInitialized())
return nullptr;
Display* display = DefaultXDisplay();
int screen = DefaultScreen(display);
ScopedXFree<GLXFBConfig> scopedConfigArr;
GLXFBConfig config;
int visid;
if (!ChooseConfig(glx, display, screen, minCaps, &scopedConfigArr, &config, &visid)) {
NS_WARNING("Failed to find a compatible config.");
return nullptr;
}
Visual* visual;
int depth;
FindVisualAndDepth(display, visid, &visual, &depth);
ScopedXErrorHandler xErrorHandler;
bool error = false;
// Must be declared before goto:
Drawable drawable;
GLXPixmap pixmap;
gfx::IntSize dummySize(16, 16);
RefPtr<gfxXlibSurface> surface = gfxXlibSurface::Create(DefaultScreenOfDisplay(display),
visual,
dummySize);
if (surface->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).
drawable = surface->XDrawable();
if (glx->GLXVersionCheck(1, 3)) {
pixmap = glx->xCreatePixmap(display, config, drawable, nullptr);
} else {
pixmap = glx->xCreateGLXPixmapWithConfig(display, config, drawable);
}
if (pixmap == 0) {
error = true;
}
DONE_CREATING_PIXMAP:
bool serverError = xErrorHandler.SyncAndGetError(display);
if (error || serverError)
return nullptr;
GLContextGLX* shareContext = GetGlobalContextGLX();
return GLContextGLX::CreateGLContext(flags, minCaps, shareContext, true, display,
pixmap, config, true, surface, profile);
}
bool
GLContextGLX::FindFBConfigForWindow(Display* display, int screen, Window window,
ScopedXFree<GLXFBConfig>* const out_scopedConfigArr,
GLXFBConfig* const out_config, int* const out_visid)
{
ScopedXFree<GLXFBConfig>& cfgs = *out_scopedConfigArr;
int numConfigs;
if (sGLXLibrary.IsATI() ||
!sGLXLibrary.GLXVersionCheck(1, 3)) {
const int attribs[] = {
LOCAL_GLX_DOUBLEBUFFER, False,
0
};
cfgs = sGLXLibrary.xChooseFBConfig(display,
screen,
attribs,
&numConfigs);
} else {
cfgs = sGLXLibrary.xGetFBConfigs(display,
screen,
&numConfigs);
}
if (!cfgs) {
NS_WARNING("[GLX] glXGetFBConfigs() failed");
return false;
}
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 windowAttrs;
if (!XGetWindowAttributes(display, window, &windowAttrs)) {
NS_WARNING("[GLX] XGetWindowAttributes() failed");
return false;
}
const VisualID windowVisualID = XVisualIDFromVisual(windowAttrs.visual);
#ifdef DEBUG
printf("[GLX] window %lx has VisualID 0x%lx\n", window, windowVisualID);
#endif
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 == windowAttrs.depth &&
AreCompatibleVisuals(windowAttrs.visual, visual)) {
*out_config = cfgs[i];
*out_visid = visid;
return true;
}
} else {
if (windowVisualID == static_cast<VisualID>(visid)) {
*out_config = cfgs[i];
*out_visid = visid;
return true;
}
}
}
NS_WARNING("[GLX] Couldn't find a FBConfig matching window visual");
return false;
}
namespace gl {
static PRBool gIsATI = PR_FALSE;
static PRBool gIsChromium = PR_FALSE;
static int gGLXVersion = 0;
PRBool
GLXLibrary::EnsureInitialized()
{
if (mInitialized) {
return PR_TRUE;
}
if (!mOGLLibrary) {
mOGLLibrary = PR_LoadLibrary("libGL.so.1");
if (!mOGLLibrary) {
NS_WARNING("Couldn't load OpenGL shared library.");
return PR_FALSE;
}
}
LibrarySymbolLoader::SymLoadStruct symbols[] = {
{ (PRFuncPtr*) &xDeleteContext, { "glXDestroyContext", NULL } },
{ (PRFuncPtr*) &xMakeCurrent, { "glXMakeCurrent", NULL } },
{ (PRFuncPtr*) &xGetProcAddress, { "glXGetProcAddress", NULL } },
{ (PRFuncPtr*) &xChooseVisual, { "glXChooseVisual", NULL } },
{ (PRFuncPtr*) &xChooseFBConfig, { "glXChooseFBConfig", NULL } },
{ (PRFuncPtr*) &xGetFBConfigs, { "glXGetFBConfigs", NULL } },
{ (PRFuncPtr*) &xCreatePbuffer, { "glXCreatePbuffer", NULL } },
{ (PRFuncPtr*) &xCreateNewContext, { "glXCreateNewContext", NULL } },
{ (PRFuncPtr*) &xDestroyPbuffer, { "glXDestroyPbuffer", NULL } },
{ (PRFuncPtr*) &xGetVisualFromFBConfig, { "glXGetVisualFromFBConfig", NULL } },
{ (PRFuncPtr*) &xGetFBConfigAttrib, { "glXGetFBConfigAttrib", NULL } },
{ (PRFuncPtr*) &xSwapBuffers, { "glXSwapBuffers", NULL } },
{ (PRFuncPtr*) &xQueryServerString, { "glXQueryServerString", NULL } },
{ (PRFuncPtr*) &xCreatePixmap, { "glXCreatePixmap", NULL } },
{ (PRFuncPtr*) &xDestroyPixmap, { "glXDestroyPixmap", NULL } },
{ (PRFuncPtr*) &xGetClientString, { "glXGetClientString", NULL } },
{ (PRFuncPtr*) &xCreateContext, { "glXCreateContext", NULL } },
{ NULL, { NULL } }
};
if (!LibrarySymbolLoader::LoadSymbols(mOGLLibrary, &symbols[0])) {
NS_WARNING("Couldn't find required entry point in OpenGL shared library");
return PR_FALSE;
}
const char *vendor = xQueryServerString(DefaultXDisplay(),
DefaultScreen(DefaultXDisplay()),
GLX_VENDOR);
const char *serverVersionStr = xQueryServerString(DefaultXDisplay(),
DefaultScreen(DefaultXDisplay()),
GLX_VERSION);
const char *clientVersionStr = xGetClientString(DefaultXDisplay(),
GLX_VERSION);
int serverVersion = 0, clientVersion = 0;
if (serverVersionStr &&
strlen(serverVersionStr) >= 3 &&
serverVersionStr[1] == '.')
{
serverVersion = (serverVersionStr[0] - '0') << 8 | (serverVersionStr[2] - '0');
}
if (clientVersionStr &&
strlen(clientVersionStr) >= 3 &&
clientVersionStr[1] == '.')
{
clientVersion = (clientVersionStr[0] - '0') << 8 | (clientVersionStr[2] - '0');
}
gGLXVersion = PR_MIN(clientVersion, serverVersion);
if (gGLXVersion < 0x0103)
return PR_FALSE;
gIsATI = vendor && strstr(vendor, "ATI");
gIsChromium = (vendor && strstr(vendor, "Chromium")) ||
(serverVersion && strstr(serverVersionStr, "Chromium"));
mInitialized = PR_TRUE;
return PR_TRUE;
}
GLXLibrary sGLXLibrary;
static bool ctxErrorOccurred = false;
static int
ctxErrorHandler(Display *dpy, XErrorEvent *ev)
{
ctxErrorOccurred = true;
return 0;
}
class GLContextGLX : public GLContext
{
public:
static already_AddRefed<GLContextGLX>
CreateGLContext(const ContextFormat& format,
Display *display,
GLXDrawable drawable,
GLXFBConfig cfg,
XVisualInfo *vinfo,
GLContextGLX *shareContext,
PRBool deleteDrawable,
gfxXlibSurface *pixmap = nsnull)
{
int db = 0, err;
err = sGLXLibrary.xGetFBConfigAttrib(display, cfg,
GLX_DOUBLEBUFFER, &db);
if (GLX_BAD_ATTRIBUTE != err) {
#ifdef DEBUG
printf("[GLX] FBConfig is %sdouble-buffered\n", db ? "" : "not ");
#endif
}
ctxErrorOccurred = false;
int (*oldHandler)(Display *, XErrorEvent *);
GLXContext context;
TRY_AGAIN_NO_SHARING:
oldHandler = XSetErrorHandler(&ctxErrorHandler);
if (gGLXVersion >= 0x0103) {
context = sGLXLibrary.xCreateNewContext(display,
cfg,
GLX_RGBA_TYPE,
shareContext ? shareContext->mContext : NULL,
True);
} else {
context = sGLXLibrary.xCreateContext(display,
vinfo,
shareContext ? shareContext->mContext : NULL,
True);
}
XSync(display, False);
XSetErrorHandler(oldHandler);
if (!context || ctxErrorOccurred) {
if (shareContext) {
shareContext = nsnull;
goto TRY_AGAIN_NO_SHARING;
}
NS_WARNING("Failed to create GLXContext!");
return nsnull;
}
nsRefPtr<GLContextGLX> glContext(new GLContextGLX(format,
shareContext,
display,
drawable,
context,
deleteDrawable,
db,
pixmap));
if (!glContext->Init()) {
return nsnull;
}
return glContext.forget();
}
~GLContextGLX()
{
if (mOffscreenFBO) {
MakeCurrent();
DeleteOffscreenFBO();
}
sGLXLibrary.xDeleteContext(mDisplay, mContext);
if (mDeleteDrawable) {
sGLXLibrary.xDestroyPixmap(mDisplay, mDrawable);
}
}
GLContextType GetContextType() {
return ContextTypeGLX;
}
PRBool Init()
{
MakeCurrent();
SetupLookupFunction();
if (!InitWithPrefix("gl", PR_TRUE)) {
return PR_FALSE;
}
return IsExtensionSupported("GL_EXT_framebuffer_object");
}
PRBool MakeCurrent()
{
Bool succeeded = sGLXLibrary.xMakeCurrent(mDisplay, mDrawable, mContext);
NS_ASSERTION(succeeded, "Failed to make GL context current!");
return succeeded;
}
PRBool SetupLookupFunction()
{
mLookupFunc = (PlatformLookupFunction)sGLXLibrary.xGetProcAddress;
return PR_TRUE;
}
void *GetNativeData(NativeDataType aType)
{
switch(aType) {
case NativeGLContext:
return mContext;
case NativeThebesSurface:
return mPixmap;
default:
return nsnull;
}
}
PRBool IsDoubleBuffered()
{
return mDoubleBuffered;
}
PRBool SwapBuffers()
{
if (!mDoubleBuffered)
return PR_FALSE;
sGLXLibrary.xSwapBuffers(mDisplay, mDrawable);
return PR_TRUE;
}
virtual already_AddRefed<TextureImage>
CreateBasicTextureImage(GLuint aTexture,
const nsIntSize& aSize,
TextureImage::ContentType aContentType,
GLContext* aContext);
private:
friend class GLContextProviderGLX;
GLContextGLX(const ContextFormat& aFormat,
GLContext *aShareContext,
Display *aDisplay,
GLXDrawable aDrawable,
GLXContext aContext,
PRBool aDeleteDrawable,
PRBool aDoubleBuffered,
gfxXlibSurface *aPixmap)
: GLContext(aFormat, aDeleteDrawable ? PR_TRUE : PR_FALSE, aShareContext),
mContext(aContext),
mDisplay(aDisplay),
mDrawable(aDrawable),
mDeleteDrawable(aDeleteDrawable),
mDoubleBuffered(aDoubleBuffered),
mPixmap(aPixmap)
{ }
GLXContext mContext;
Display *mDisplay;
GLXDrawable mDrawable;
PRPackedBool mDeleteDrawable;
PRPackedBool mDoubleBuffered;
nsRefPtr<gfxXlibSurface> mPixmap;
};
// FIXME/bug 575505: this is a (very slow!) placeholder
// implementation. Much better would be to create a Pixmap, wrap that
// in a GLXPixmap, and then glXBindTexImage() to our texture.
class TextureImageGLX : public BasicTextureImage
{
friend already_AddRefed<TextureImage>
GLContextGLX::CreateBasicTextureImage(GLuint,
const nsIntSize&,
TextureImage::ContentType,
GLContext*);
protected:
virtual already_AddRefed<gfxASurface>
CreateUpdateSurface(const gfxIntSize& aSize, ImageFormat aFmt)
{
mUpdateFormat = aFmt;
return gfxPlatform::GetPlatform()->CreateOffscreenSurface(aSize, aFmt);
}
virtual already_AddRefed<gfxImageSurface>
GetImageForUpload(gfxASurface* aUpdateSurface)
{
nsRefPtr<gfxImageSurface> image =
new gfxImageSurface(gfxIntSize(mUpdateRect.width,
mUpdateRect.height),
mUpdateFormat);
nsRefPtr<gfxContext> tmpContext = new gfxContext(image);
tmpContext->SetSource(aUpdateSurface);
tmpContext->SetOperator(gfxContext::OPERATOR_SOURCE);
tmpContext->Paint();
return image.forget();
}
private:
TextureImageGLX(GLuint aTexture,
const nsIntSize& aSize,
ContentType aContentType,
GLContext* aContext)
: BasicTextureImage(aTexture, aSize, aContentType, aContext)
{}
ImageFormat mUpdateFormat;
};
already_AddRefed<TextureImage>
GLContextGLX::CreateBasicTextureImage(GLuint aTexture,
const nsIntSize& aSize,
TextureImage::ContentType aContentType,
GLContext* aContext)
{
nsRefPtr<TextureImageGLX> teximage(
new TextureImageGLX(aTexture, aSize, aContentType, aContext));
return teximage.forget();
}
static GLContextGLX *
GetGlobalContextGLX()
{
return static_cast<GLContextGLX*>(GLContextProviderGLX::GetGlobalContext());
}
static PRBool
AreCompatibleVisuals(XVisualInfo *one, XVisualInfo *two)
{
if (one->c_class != two->c_class) {
return PR_FALSE;
}
if (one->depth != two->depth) {
return PR_FALSE;
}
if (one->red_mask != two->red_mask ||
one->green_mask != two->green_mask ||
one->blue_mask != two->blue_mask) {
return PR_FALSE;
}
if (one->bits_per_rgb != two->bits_per_rgb) {
return PR_FALSE;
}
return PR_TRUE;
}
already_AddRefed<GLContext>
GLContextProviderGLX::CreateForWindow(nsIWidget *aWidget)
{
if (!sGLXLibrary.EnsureInitialized()) {
return nsnull;
}
// 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);
int xscreen = DefaultScreen(display);
Window window = GET_NATIVE_WINDOW(aWidget);
int numConfigs;
ScopedXFree<GLXFBConfig> cfgs;
if (gIsATI) {
const int attribs[] = {
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 nsnull;
}
NS_ASSERTION(numConfigs > 0, "No FBConfigs found!");
// XXX the visual ID is almost certainly the 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");
XFree(cfgs);
return nsnull;
}
const VisualID widgetVisualID = XVisualIDFromVisual(widgetAttrs.visual);
#ifdef DEBUG
printf("[GLX] widget has VisualID 0x%lx\n", widgetVisualID);
#endif
ScopedXFree<XVisualInfo> vi;
if (gIsATI) {
XVisualInfo vinfo_template;
int nvisuals;
vinfo_template.visual = widgetAttrs.visual;
vinfo_template.visualid = XVisualIDFromVisual(vinfo_template.visual);
vinfo_template.depth = widgetAttrs.depth;
vinfo_template.screen = xscreen;
vi = XGetVisualInfo(display, VisualIDMask|VisualDepthMask|VisualScreenMask,
&vinfo_template, &nvisuals);
NS_ASSERTION(vi && nvisuals == 1, "Could not locate unique matching XVisualInfo for Visual");
}
int matchIndex = -1;
ScopedXFree<XVisualInfo> vinfo;
for (int i = 0; i < numConfigs; i++) {
vinfo = sGLXLibrary.xGetVisualFromFBConfig(display, cfgs[i]);
if (!vinfo) {
continue;
}
if (gIsATI) {
if (AreCompatibleVisuals(vi, vinfo)) {
matchIndex = i;
break;
}
} else {
if (widgetVisualID == vinfo->visualid) {
matchIndex = i;
break;
}
}
}
if (matchIndex == -1) {
NS_WARNING("[GLX] Couldn't find a FBConfig matching widget visual");
return nsnull;
}
GLContextGLX *shareContext = GetGlobalContextGLX();
nsRefPtr<GLContextGLX> glContext = GLContextGLX::CreateGLContext(ContextFormat(ContextFormat::BasicRGB24),
display,
window,
cfgs[matchIndex],
vinfo,
shareContext,
PR_FALSE);
return glContext.forget();
}
static already_AddRefed<GLContextGLX>
CreateOffscreenPixmapContext(const gfxIntSize& aSize,
const ContextFormat& aFormat,
PRBool aShare)
{
if (!sGLXLibrary.EnsureInitialized()) {
return nsnull;
}
Display *display = DefaultXDisplay();
int xscreen = DefaultScreen(display);
int attribs[] = {
GLX_DOUBLEBUFFER, False,
GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
GLX_X_RENDERABLE, True,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 0,
GLX_DEPTH_SIZE, 0,
0
};
int numConfigs = 0;
ScopedXFree<GLXFBConfig> cfgs;
cfgs = sGLXLibrary.xChooseFBConfig(display,
xscreen,
attribs,
&numConfigs);
if (!cfgs) {
return nsnull;
}
NS_ASSERTION(numConfigs > 0,
"glXChooseFBConfig() failed to match our requested format and violated its spec (!)");
ScopedXFree<XVisualInfo> vinfo;
int chosenIndex;
for (int i = 0; i < numConfigs; ++i) {
int dtype, visid;
if (sGLXLibrary.xGetFBConfigAttrib(display, cfgs[i], GLX_DRAWABLE_TYPE, &dtype) != Success
|| !(dtype & GLX_PIXMAP_BIT))
{
continue;
}
if (sGLXLibrary.xGetFBConfigAttrib(display, cfgs[i], GLX_VISUAL_ID, &visid) != Success
|| visid == 0)
{
continue;
}
vinfo = sGLXLibrary.xGetVisualFromFBConfig(display, cfgs[i]);
if (vinfo) {
chosenIndex = i;
break;
}
}
if (!vinfo) {
NS_WARNING("glXChooseFBConfig() didn't give us any configs with visuals!");
return nsnull;
}
nsRefPtr<gfxXlibSurface> xsurface = gfxXlibSurface::Create(DefaultScreenOfDisplay(display),
vinfo->visual,
gfxIntSize(16, 16));
if (xsurface->CairoStatus() != 0) {
return nsnull;
}
GLXPixmap glxpixmap = sGLXLibrary.xCreatePixmap(display,
cfgs[chosenIndex],
xsurface->XDrawable(),
NULL);
if (glxpixmap == 0) {
return nsnull;
}
GLContextGLX *shareContext = aShare ? GetGlobalContextGLX() : nsnull;
nsRefPtr<GLContextGLX> glContext = GLContextGLX::CreateGLContext(aFormat,
display,
glxpixmap,
cfgs[chosenIndex],
vinfo,
shareContext,
PR_TRUE,
xsurface);
return glContext.forget();
}
already_AddRefed<GLContext>
GLContextProviderGLX::CreateOffscreen(const gfxIntSize& aSize,
const ContextFormat& aFormat)
{
nsRefPtr<GLContextGLX> glContext =
CreateOffscreenPixmapContext(aSize, aFormat, PR_TRUE);
if (!glContext) {
return nsnull;
}
if (!glContext->GetSharedContext()) {
// no point in returning anything if sharing failed, we can't
// render from this
return nsnull;
}
if (!glContext->ResizeOffscreenFBO(aSize)) {
// we weren't able to create the initial
// offscreen FBO, so this is dead
return nsnull;
}
return glContext.forget();
}
already_AddRefed<GLContext>
GLContextProviderGLX::CreateForNativePixmapSurface(gfxASurface *aSurface)
{
if (!sGLXLibrary.EnsureInitialized()) {
return nsnull;
}
if (aSurface->GetType() != gfxASurface::SurfaceTypeXlib) {
NS_WARNING("GLContextProviderGLX::CreateForNativePixmapSurface called with non-Xlib surface");
return nsnull;
}
nsAutoTArray<int, 20> attribs;
#define A1_(_x) do { attribs.AppendElement(_x); } while(0)
#define A2_(_x,_y) do { \
attribs.AppendElement(_x); \
attribs.AppendElement(_y); \
} while(0)
A2_(GLX_DOUBLEBUFFER, False);
A2_(GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT);
A1_(0);
int numFormats;
Display *display = DefaultXDisplay();
int xscreen = DefaultScreen(display);
ScopedXFree<GLXFBConfig> cfg(sGLXLibrary.xChooseFBConfig(display,
xscreen,
attribs.Elements(),
&numFormats));
if (!cfg) {
return nsnull;
}
NS_ASSERTION(numFormats > 0,
"glXChooseFBConfig() failed to match our requested format and violated its spec (!)");
gfxXlibSurface *xs = static_cast<gfxXlibSurface*>(aSurface);
GLXPixmap glxpixmap = sGLXLibrary.xCreatePixmap(display,
cfg[0],
xs->XDrawable(),
NULL);
nsRefPtr<GLContextGLX> glContext = GLContextGLX::CreateGLContext(ContextFormat(ContextFormat::BasicRGB24),
display,
glxpixmap,
cfg[0],
NULL,
NULL,
PR_FALSE,
xs);
if (!glContext->Init()) {
return nsnull;
}
return glContext.forget();
}
static nsRefPtr<GLContext> gGlobalContext;
GLContext *
GLContextProviderGLX::GetGlobalContext()
{
static bool triedToCreateContext = false;
if (!triedToCreateContext && !gGlobalContext) {
triedToCreateContext = true;
gGlobalContext = CreateOffscreenPixmapContext(gfxIntSize(1, 1),
ContextFormat(ContextFormat::BasicRGB24),
PR_FALSE);
if (gGlobalContext)
gGlobalContext->SetIsGlobalSharedContext(PR_TRUE);
}
return gGlobalContext;
}
void
GLContextProviderGLX::Shutdown()
{
gGlobalContext = nsnull;
}
} /* namespace gl */
static already_AddRefed<GLContextGLX>
CreateOffscreenPixmapContext(const gfxIntSize& aSize,
const ContextFormat& aFormat,
PRBool aShare)
{
if (!sGLXLibrary.EnsureInitialized()) {
return nsnull;
}
Display *display = DefaultXDisplay();
int xscreen = DefaultScreen(display);
int attribs[] = {
GLX_DOUBLEBUFFER, False,
GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
GLX_X_RENDERABLE, True,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 0,
GLX_DEPTH_SIZE, 0,
0
};
int numConfigs = 0;
ScopedXFree<GLXFBConfig> cfgs;
cfgs = sGLXLibrary.xChooseFBConfig(display,
xscreen,
attribs,
&numConfigs);
if (!cfgs) {
return nsnull;
}
NS_ASSERTION(numConfigs > 0,
"glXChooseFBConfig() failed to match our requested format and violated its spec (!)");
ScopedXFree<XVisualInfo> vinfo;
int chosenIndex;
for (int i = 0; i < numConfigs; ++i) {
int dtype, visid;
if (sGLXLibrary.xGetFBConfigAttrib(display, cfgs[i], GLX_DRAWABLE_TYPE, &dtype) != Success
|| !(dtype & GLX_PIXMAP_BIT))
{
continue;
}
if (sGLXLibrary.xGetFBConfigAttrib(display, cfgs[i], GLX_VISUAL_ID, &visid) != Success
|| visid == 0)
{
continue;
}
vinfo = sGLXLibrary.xGetVisualFromFBConfig(display, cfgs[i]);
if (vinfo) {
chosenIndex = i;
break;
}
}
if (!vinfo) {
NS_WARNING("glXChooseFBConfig() didn't give us any configs with visuals!");
return nsnull;
}
nsRefPtr<gfxXlibSurface> xsurface = gfxXlibSurface::Create(DefaultScreenOfDisplay(display),
vinfo->visual,
gfxIntSize(16, 16));
if (xsurface->CairoStatus() != 0) {
return nsnull;
}
GLXPixmap glxpixmap = sGLXLibrary.xCreatePixmap(display,
cfgs[chosenIndex],
xsurface->XDrawable(),
NULL);
if (glxpixmap == 0) {
return nsnull;
}
GLContextGLX *shareContext = aShare ? GetGlobalContextGLX() : nsnull;
nsRefPtr<GLContextGLX> glContext = GLContextGLX::CreateGLContext(aFormat,
display,
glxpixmap,
cfgs[chosenIndex],
vinfo,
shareContext,
PR_TRUE,
xsurface);
return glContext.forget();
}
already_AddRefed<GLContext>
GLContextProviderGLX::CreateForWindow(nsIWidget *aWidget)
{
if (!sGLXLibrary.EnsureInitialized()) {
return nsnull;
}
// 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);
int xscreen = DefaultScreen(display);
Window window = GET_NATIVE_WINDOW(aWidget);
int numConfigs;
ScopedXFree<GLXFBConfig> cfgs;
if (gIsATI) {
const int attribs[] = {
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 nsnull;
}
NS_ASSERTION(numConfigs > 0, "No FBConfigs found!");
// XXX the visual ID is almost certainly the 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");
XFree(cfgs);
return nsnull;
}
const VisualID widgetVisualID = XVisualIDFromVisual(widgetAttrs.visual);
#ifdef DEBUG
printf("[GLX] widget has VisualID 0x%lx\n", widgetVisualID);
#endif
ScopedXFree<XVisualInfo> vi;
if (gIsATI) {
XVisualInfo vinfo_template;
int nvisuals;
vinfo_template.visual = widgetAttrs.visual;
vinfo_template.visualid = XVisualIDFromVisual(vinfo_template.visual);
vinfo_template.depth = widgetAttrs.depth;
vinfo_template.screen = xscreen;
vi = XGetVisualInfo(display, VisualIDMask|VisualDepthMask|VisualScreenMask,
&vinfo_template, &nvisuals);
NS_ASSERTION(vi && nvisuals == 1, "Could not locate unique matching XVisualInfo for Visual");
}
int matchIndex = -1;
ScopedXFree<XVisualInfo> vinfo;
for (int i = 0; i < numConfigs; i++) {
vinfo = sGLXLibrary.xGetVisualFromFBConfig(display, cfgs[i]);
if (!vinfo) {
continue;
}
if (gIsATI) {
if (AreCompatibleVisuals(vi, vinfo)) {
matchIndex = i;
break;
}
} else {
if (widgetVisualID == vinfo->visualid) {
matchIndex = i;
break;
}
}
}
if (matchIndex == -1) {
NS_WARNING("[GLX] Couldn't find a FBConfig matching widget visual");
return nsnull;
}
GLContextGLX *shareContext = GetGlobalContextGLX();
nsRefPtr<GLContextGLX> glContext = GLContextGLX::CreateGLContext(ContextFormat(ContextFormat::BasicRGB24),
display,
window,
cfgs[matchIndex],
vinfo,
shareContext,
PR_FALSE);
return glContext.forget();
}
PRBool MakeCurrent()
{
Bool succeeded = sGLXLibrary.xMakeCurrent(mDisplay, mDrawable, mContext);
NS_ASSERTION(succeeded, "Failed to make GL context current!");
return succeeded;
}
static already_AddRefed<GLContextGLX>
CreateGLContext(const ContextFormat& format,
Display *display,
GLXDrawable drawable,
GLXFBConfig cfg,
XVisualInfo *vinfo,
GLContextGLX *shareContext,
PRBool deleteDrawable,
gfxXlibSurface *pixmap = nsnull)
{
int db = 0, err;
err = sGLXLibrary.xGetFBConfigAttrib(display, cfg,
GLX_DOUBLEBUFFER, &db);
if (GLX_BAD_ATTRIBUTE != err) {
#ifdef DEBUG
printf("[GLX] FBConfig is %sdouble-buffered\n", db ? "" : "not ");
#endif
}
ctxErrorOccurred = false;
int (*oldHandler)(Display *, XErrorEvent *);
GLXContext context;
TRY_AGAIN_NO_SHARING:
oldHandler = XSetErrorHandler(&ctxErrorHandler);
if (gGLXVersion >= 0x0103) {
context = sGLXLibrary.xCreateNewContext(display,
cfg,
GLX_RGBA_TYPE,
shareContext ? shareContext->mContext : NULL,
True);
} else {
context = sGLXLibrary.xCreateContext(display,
vinfo,
shareContext ? shareContext->mContext : NULL,
True);
}
XSync(display, False);
XSetErrorHandler(oldHandler);
if (!context || ctxErrorOccurred) {
if (shareContext) {
shareContext = nsnull;
goto TRY_AGAIN_NO_SHARING;
}
NS_WARNING("Failed to create GLXContext!");
return nsnull;
}
nsRefPtr<GLContextGLX> glContext(new GLContextGLX(format,
shareContext,
display,
drawable,
context,
deleteDrawable,
db,
pixmap));
if (!glContext->Init()) {
return nsnull;
}
return glContext.forget();
}
