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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /gfx/gl/GLContextProviderGLX.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/gl/GLContextProviderGLX.cpp')
-rw-r--r--gfx/gl/GLContextProviderGLX.cpp904
1 files changed, 904 insertions, 0 deletions
diff --git a/gfx/gl/GLContextProviderGLX.cpp b/gfx/gl/GLContextProviderGLX.cpp
new file mode 100644
index 0000000000..a0ecac3751
--- /dev/null
+++ b/gfx/gl/GLContextProviderGLX.cpp
@@ -0,0 +1,904 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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))
+#endif
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include "X11UndefineNone.h"
+
+#include "mozilla/MathAlgorithms.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/layers/CompositorOptions.h"
+#include "mozilla/Range.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Sprintf.h"
+#include "mozilla/StaticPrefs_gfx.h"
+#include "mozilla/StaticPrefs_layout.h"
+#include "mozilla/widget/CompositorWidget.h"
+#include "mozilla/widget/GtkCompositorWidget.h"
+#include "mozilla/Unused.h"
+
+#include "prenv.h"
+#include "GLContextProvider.h"
+#include "GLLibraryLoader.h"
+#include "nsDebug.h"
+#include "nsIWidget.h"
+#include "GLXLibrary.h"
+#include "gfxContext.h"
+#include "gfxEnv.h"
+#include "gfxPlatform.h"
+#include "GLContextGLX.h"
+#include "gfxUtils.h"
+#include "gfx2DGlue.h"
+#include "GLScreenBuffer.h"
+
+#include "gfxCrashReporterUtils.h"
+
+#ifdef MOZ_WIDGET_GTK
+# include "gfxPlatformGtk.h"
+#endif
+
+namespace mozilla::gl {
+
+using namespace mozilla::gfx;
+using namespace mozilla::widget;
+
+GLXLibrary sGLXLibrary;
+
+static inline bool HasExtension(const char* aExtensions,
+ const char* aRequiredExtension) {
+ return GLContext::ListHasExtension(
+ reinterpret_cast<const GLubyte*>(aExtensions), aRequiredExtension);
+}
+
+bool GLXLibrary::EnsureInitialized(Display* aDisplay) {
+ if (mInitialized) {
+ return true;
+ }
+
+ // Don't repeatedly try to initialize.
+ if (mTriedInitializing) {
+ return false;
+ }
+ mTriedInitializing = true;
+
+ MOZ_ASSERT(aDisplay);
+ if (!aDisplay) {
+ return false;
+ }
+
+ // Force enabling s3 texture compression. (Bug 774134)
+ PR_SetEnv("force_s3tc_enable=true");
+
+ if (!mOGLLibrary) {
+ // see e.g. bug 608526: it is intrinsically interesting to know whether we
+ // have dynamically linked to libGL.so.1 because at least the NVIDIA
+ // implementation requires an executable stack, which causes mprotect calls,
+ // which trigger glibc bug
+ // http://sourceware.org/bugzilla/show_bug.cgi?id=12225
+ const char* libGLfilename = "libGL.so.1";
+#if defined(__OpenBSD__) || defined(__NetBSD__)
+ libGLfilename = "libGL.so";
+#endif
+
+ const bool forceFeatureReport = false;
+ ScopedGfxFeatureReporter reporter(libGLfilename, forceFeatureReport);
+ mOGLLibrary = PR_LoadLibrary(libGLfilename);
+ if (!mOGLLibrary) {
+ NS_WARNING("Couldn't load OpenGL shared library.");
+ return false;
+ }
+ reporter.SetSuccessful();
+ }
+
+ if (gfxEnv::MOZ_GLX_DEBUG()) {
+ mDebug = true;
+ }
+
+#define SYMBOL(X) \
+ { \
+ (PRFuncPtr*)&mSymbols.f##X, { \
+ { "glX" #X } \
+ } \
+ }
+#define END_OF_SYMBOLS \
+ { \
+ nullptr, {} \
+ }
+
+ const SymLoadStruct symbols[] = {
+ /* functions that were in GLX 1.0 */
+ SYMBOL(DestroyContext),
+ SYMBOL(MakeCurrent),
+ SYMBOL(SwapBuffers),
+ SYMBOL(QueryVersion),
+ SYMBOL(GetConfig),
+ SYMBOL(GetCurrentContext),
+ SYMBOL(WaitGL),
+ SYMBOL(WaitX),
+
+ /* functions introduced in GLX 1.1 */
+ SYMBOL(QueryExtensionsString),
+ SYMBOL(GetClientString),
+ SYMBOL(QueryServerString),
+
+ /* functions introduced in GLX 1.3 */
+ SYMBOL(ChooseFBConfig),
+ SYMBOL(ChooseVisual),
+ SYMBOL(GetFBConfigAttrib),
+ SYMBOL(GetFBConfigs),
+ SYMBOL(CreatePixmap),
+ SYMBOL(DestroyPixmap),
+ SYMBOL(CreateNewContext),
+
+ // Core in GLX 1.4, ARB extension before.
+ {(PRFuncPtr*)&mSymbols.fGetProcAddress,
+ {{"glXGetProcAddress", "glXGetProcAddressARB"}}},
+ END_OF_SYMBOLS};
+
+ {
+ const SymbolLoader libLoader(*mOGLLibrary);
+ if (!libLoader.LoadSymbols(symbols)) {
+ NS_WARNING("Couldn't load required GLX symbols.");
+ return false;
+ }
+ }
+ const SymbolLoader pfnLoader(mSymbols.fGetProcAddress);
+
+ int screen = DefaultScreen(aDisplay);
+
+ {
+ int major, minor;
+ if (!fQueryVersion(aDisplay, &major, &minor) || major != 1 || minor < 3) {
+ NS_ERROR("GLX version older than 1.3. (released in 1998)");
+ return false;
+ }
+ }
+
+ const SymLoadStruct symbols_createcontext[] = {
+ SYMBOL(CreateContextAttribsARB), END_OF_SYMBOLS};
+
+ const SymLoadStruct symbols_videosync[] = {
+ SYMBOL(GetVideoSyncSGI), SYMBOL(WaitVideoSyncSGI), END_OF_SYMBOLS};
+
+ const SymLoadStruct symbols_swapcontrol[] = {SYMBOL(SwapIntervalEXT),
+ END_OF_SYMBOLS};
+
+ const SymLoadStruct symbols_querydrawable[] = {SYMBOL(QueryDrawable),
+ END_OF_SYMBOLS};
+
+ const auto fnLoadSymbols = [&](const SymLoadStruct* symbols) {
+ if (pfnLoader.LoadSymbols(symbols)) return true;
+
+ ClearSymbols(symbols);
+ return false;
+ };
+
+ const char* clientVendor = fGetClientString(aDisplay, LOCAL_GLX_VENDOR);
+ const char* serverVendor =
+ fQueryServerString(aDisplay, screen, LOCAL_GLX_VENDOR);
+ const char* extensionsStr = fQueryExtensionsString(aDisplay, screen);
+
+ if (HasExtension(extensionsStr, "GLX_ARB_create_context") &&
+ HasExtension(extensionsStr, "GLX_ARB_create_context_profile") &&
+ fnLoadSymbols(symbols_createcontext)) {
+ mHasCreateContextAttribs = true;
+ }
+
+ if (HasExtension(extensionsStr, "GLX_ARB_create_context_robustness")) {
+ mHasRobustness = true;
+ }
+
+ if (HasExtension(extensionsStr, "GLX_NV_robustness_video_memory_purge")) {
+ mHasVideoMemoryPurge = true;
+ }
+
+ if (HasExtension(extensionsStr, "GLX_SGI_video_sync") &&
+ fnLoadSymbols(symbols_videosync)) {
+ mHasVideoSync = true;
+ }
+
+ if (!HasExtension(extensionsStr, "GLX_EXT_swap_control") ||
+ !fnLoadSymbols(symbols_swapcontrol)) {
+ NS_WARNING(
+ "GLX_swap_control unsupported, ASAP mode may still block on buffer "
+ "swaps.");
+ }
+
+ if (HasExtension(extensionsStr, "GLX_EXT_buffer_age") &&
+ fnLoadSymbols(symbols_querydrawable)) {
+ mHasBufferAge = true;
+ }
+
+ mIsATI = serverVendor && DoesStringMatch(serverVendor, "ATI");
+ mIsNVIDIA =
+ serverVendor && DoesStringMatch(serverVendor, "NVIDIA Corporation");
+ mClientIsMesa = clientVendor && DoesStringMatch(clientVendor, "Mesa");
+
+ mInitialized = true;
+
+ // This needs to be after `fQueryServerString` is called so that the
+ // driver is loaded.
+ MesaMemoryLeakWorkaround();
+
+ return true;
+}
+
+bool GLXLibrary::SupportsVideoSync(Display* aDisplay) {
+ if (!EnsureInitialized(aDisplay)) {
+ return false;
+ }
+
+ return mHasVideoSync;
+}
+
+static int (*sOldErrorHandler)(Display*, XErrorEvent*);
+static XErrorEvent sErrorEvent = {};
+
+static int GLXErrorHandler(Display* display, XErrorEvent* ev) {
+ if (!sErrorEvent.error_code) {
+ sErrorEvent = *ev;
+ }
+ return 0;
+}
+
+GLXLibrary::WrapperScope::WrapperScope(const GLXLibrary& glx,
+ const char* const funcName,
+ Display* aDisplay)
+ : mGlx(glx), mFuncName(funcName), mDisplay(aDisplay) {
+ if (mGlx.mDebug) {
+ sOldErrorHandler = XSetErrorHandler(GLXErrorHandler);
+ }
+}
+
+GLXLibrary::WrapperScope::~WrapperScope() {
+ if (mGlx.mDebug) {
+ if (mDisplay) {
+ FinishX(mDisplay);
+ }
+ if (sErrorEvent.error_code) {
+ char buffer[100] = {};
+ if (mDisplay) {
+ XGetErrorText(mDisplay, sErrorEvent.error_code, buffer, sizeof(buffer));
+ } else {
+ SprintfLiteral(buffer, "%d", sErrorEvent.error_code);
+ }
+ printf_stderr("X ERROR after %s: %s (%i) - Request: %i.%i, Serial: %lu",
+ mFuncName, buffer, sErrorEvent.error_code,
+ sErrorEvent.request_code, sErrorEvent.minor_code,
+ sErrorEvent.serial);
+ MOZ_ASSERT_UNREACHABLE("AfterGLXCall sErrorEvent");
+ }
+ const auto was = XSetErrorHandler(sOldErrorHandler);
+ if (was != GLXErrorHandler) {
+ NS_WARNING("Concurrent XSetErrorHandlers");
+ }
+ }
+}
+
+// Returns the GTK display if available; otherwise, if a display was
+// previously opened by this method and is still open, returns a
+// reference to it; otherwise, opens a new connection. (The non-GTK
+// cases are similar to what we do for EGL.)
+std::shared_ptr<XlibDisplay> GLXLibrary::GetDisplay() {
+ std::shared_ptr<XlibDisplay> display;
+
+#ifdef MOZ_WIDGET_GTK
+ static const bool kHaveGtk = !!gdk_display_get_default();
+ if (kHaveGtk) {
+ display = XlibDisplay::Borrow(DefaultXDisplay());
+ }
+#endif
+ if (display) {
+ return display;
+ }
+
+ auto ownDisplay = mOwnDisplay.Lock();
+ display = ownDisplay->lock();
+ if (display) {
+ return display;
+ }
+
+ display = XlibDisplay::Open(nullptr);
+ if (NS_WARN_IF(!display)) {
+ return nullptr;
+ }
+ *ownDisplay = display;
+ return display;
+}
+
+already_AddRefed<GLContextGLX> GLContextGLX::CreateGLContext(
+ const GLContextDesc& desc, std::shared_ptr<XlibDisplay> display,
+ GLXDrawable drawable, GLXFBConfig cfg, Drawable ownedPixmap) {
+ GLXLibrary& glx = sGLXLibrary;
+
+ int isDoubleBuffered = 0;
+ int err = glx.fGetFBConfigAttrib(*display, cfg, LOCAL_GLX_DOUBLEBUFFER,
+ &isDoubleBuffered);
+ if (LOCAL_GLX_BAD_ATTRIBUTE != err) {
+ if (ShouldSpew()) {
+ printf("[GLX] FBConfig is %sdouble-buffered\n",
+ isDoubleBuffered ? "" : "not ");
+ }
+ }
+
+ if (!glx.HasCreateContextAttribs()) {
+ NS_WARNING("Cannot create GLContextGLX without glxCreateContextAttribs");
+ return nullptr;
+ }
+
+ // -
+
+ const auto CreateWithAttribs =
+ [&](const std::vector<int>& attribs) -> RefPtr<GLContextGLX> {
+ auto terminated = attribs;
+ terminated.push_back(0);
+
+ const auto glxContext = glx.fCreateContextAttribs(
+ *display, cfg, nullptr, X11True, terminated.data());
+ if (!glxContext) return nullptr;
+ const RefPtr<GLContextGLX> ret = new GLContextGLX(
+ desc, display, drawable, glxContext, isDoubleBuffered, ownedPixmap);
+
+ if (!ret->Init()) return nullptr;
+
+ return ret;
+ };
+
+ // -
+
+ RefPtr<GLContextGLX> glContext;
+
+ std::vector<int> attribs;
+ attribs.insert(attribs.end(), {
+ LOCAL_GLX_RENDER_TYPE,
+ LOCAL_GLX_RGBA_TYPE,
+ });
+ if (glx.HasVideoMemoryPurge()) {
+ attribs.insert(attribs.end(),
+ {
+ LOCAL_GLX_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV,
+ LOCAL_GL_TRUE,
+ });
+ }
+ const bool useCore =
+ !(desc.flags & CreateContextFlags::REQUIRE_COMPAT_PROFILE);
+ if (useCore) {
+ attribs.insert(attribs.end(), {
+ LOCAL_GLX_CONTEXT_MAJOR_VERSION_ARB,
+ 3,
+ LOCAL_GLX_CONTEXT_MINOR_VERSION_ARB,
+ 2,
+ LOCAL_GLX_CONTEXT_PROFILE_MASK_ARB,
+ LOCAL_GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
+ });
+ }
+
+ if (glx.HasRobustness()) {
+ auto withRobustness = attribs;
+ withRobustness.insert(withRobustness.end(),
+ {
+ LOCAL_GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
+ LOCAL_GLX_LOSE_CONTEXT_ON_RESET_ARB,
+ });
+
+ {
+ auto withRBAB = withRobustness;
+ withRBAB.insert(withRBAB.end(),
+ {
+ LOCAL_GLX_CONTEXT_FLAGS_ARB,
+ LOCAL_GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB,
+ });
+ if (!glContext) {
+ glContext = CreateWithAttribs(withRBAB);
+ if (!glContext) {
+ NS_WARNING("Failed to create+init GLContextGLX with RBAB");
+ }
+ }
+ }
+
+ if (!glContext) {
+ glContext = CreateWithAttribs(withRobustness);
+ if (!glContext) {
+ NS_WARNING("Failed to create+init GLContextGLX with Robustness");
+ }
+ }
+ }
+
+ if (!glContext) {
+ glContext = CreateWithAttribs(attribs);
+ if (!glContext) {
+ NS_WARNING("Failed to create+init GLContextGLX with required attribs");
+ }
+ }
+
+ return glContext.forget();
+}
+
+GLContextGLX::~GLContextGLX() {
+ MarkDestroyed();
+
+ // Wrapped context should not destroy glxContext/Surface
+ if (!mOwnsContext) {
+ return;
+ }
+
+ // see bug 659842 comment 76
+ bool success = mGLX->fMakeCurrent(*mDisplay, X11None, nullptr);
+ if (!success) {
+ NS_WARNING(
+ "glXMakeCurrent failed to release GL context before we call "
+ "glXDestroyContext!");
+ }
+
+ mGLX->fDestroyContext(*mDisplay, mContext);
+
+ // If we own the enclosed X pixmap, then free it after we free the enclosing
+ // GLX pixmap.
+ if (mOwnedPixmap) {
+ mGLX->fDestroyPixmap(*mDisplay, mDrawable);
+ XFreePixmap(*mDisplay, mOwnedPixmap);
+ }
+}
+
+bool GLContextGLX::Init() {
+ if (!GLContext::Init()) {
+ return false;
+ }
+
+ // EXT_framebuffer_object is not supported on Core contexts
+ // so we'll also check for ARB_framebuffer_object
+ if (!IsExtensionSupported(EXT_framebuffer_object) &&
+ !IsSupported(GLFeature::framebuffer_object))
+ return false;
+
+ return true;
+}
+
+bool GLContextGLX::MakeCurrentImpl() const {
+ if (mGLX->IsMesa()) {
+ // Read into the event queue to ensure that Mesa receives a
+ // DRI2InvalidateBuffers event before drawing. See bug 1280653.
+ Unused << XPending(*mDisplay);
+ }
+
+ const bool succeeded = mGLX->fMakeCurrent(*mDisplay, mDrawable, mContext);
+ if (!succeeded) {
+ NS_WARNING("Failed to make GL context current!");
+ }
+
+ if (!IsOffscreen() && mGLX->SupportsSwapControl()) {
+ // Many GLX implementations default to blocking until the next
+ // VBlank when calling glXSwapBuffers. We want to run unthrottled
+ // in ASAP mode. See bug 1280744.
+ const bool swapInterval = gfxVars::SwapIntervalGLX();
+ const bool isASAP = (StaticPrefs::layout_frame_rate() == 0);
+ const int interval = (swapInterval && !isASAP) ? 1 : 0;
+ mGLX->fSwapInterval(*mDisplay, mDrawable, interval);
+ }
+ return succeeded;
+}
+
+bool GLContextGLX::IsCurrentImpl() const {
+ return mGLX->fGetCurrentContext() == mContext;
+}
+
+Maybe<SymbolLoader> GLContextGLX::GetSymbolLoader() const {
+ const auto pfn = sGLXLibrary.GetGetProcAddress();
+ return Some(SymbolLoader(pfn));
+}
+
+bool GLContextGLX::IsDoubleBuffered() const { return mDoubleBuffered; }
+
+bool GLContextGLX::SwapBuffers() {
+ if (!mDoubleBuffered) return false;
+ mGLX->fSwapBuffers(*mDisplay, mDrawable);
+ return true;
+}
+
+GLint GLContextGLX::GetBufferAge() const {
+ if (!sGLXLibrary.SupportsBufferAge()) {
+ return 0;
+ }
+
+ GLuint result = 0;
+ mGLX->fQueryDrawable(*mDisplay, mDrawable, LOCAL_GLX_BACK_BUFFER_AGE_EXT,
+ &result);
+ if (result > INT32_MAX) {
+ // If the result can't fit, just assume the buffer cannot be reused.
+ return 0;
+ }
+ return result;
+}
+
+void GLContextGLX::GetWSIInfo(nsCString* const out) const {
+ int screen = DefaultScreen(mDisplay->get());
+
+ int majorVersion, minorVersion;
+ sGLXLibrary.fQueryVersion(*mDisplay, &majorVersion, &minorVersion);
+
+ out->Append(nsPrintfCString("GLX %u.%u", majorVersion, minorVersion));
+
+ out->AppendLiteral("\nGLX_VENDOR(client): ");
+ out->Append(sGLXLibrary.fGetClientString(*mDisplay, LOCAL_GLX_VENDOR));
+
+ out->AppendLiteral("\nGLX_VENDOR(server): ");
+ out->Append(
+ sGLXLibrary.fQueryServerString(*mDisplay, screen, LOCAL_GLX_VENDOR));
+
+ out->AppendLiteral("\nExtensions: ");
+ out->Append(sGLXLibrary.fQueryExtensionsString(*mDisplay, screen));
+}
+
+bool GLContextGLX::OverrideDrawable(GLXDrawable drawable) {
+ return mGLX->fMakeCurrent(*mDisplay, drawable, mContext);
+}
+
+bool GLContextGLX::RestoreDrawable() {
+ return mGLX->fMakeCurrent(*mDisplay, mDrawable, mContext);
+}
+
+GLContextGLX::GLContextGLX(const GLContextDesc& desc,
+ std::shared_ptr<XlibDisplay> aDisplay,
+ GLXDrawable aDrawable, GLXContext aContext,
+ bool aDoubleBuffered, Drawable aOwnedPixmap)
+ : GLContext(desc, nullptr),
+ mContext(aContext),
+ mDisplay(aDisplay),
+ mDrawable(aDrawable),
+ mOwnedPixmap(aOwnedPixmap),
+ mDoubleBuffered(aDoubleBuffered),
+ mGLX(&sGLXLibrary) {}
+
+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;
+}
+
+already_AddRefed<GLContext> CreateForWidget(Display* aXDisplay, Window aXWindow,
+ bool aHardwareWebRender,
+ bool aForceAccelerated) {
+ if (!sGLXLibrary.EnsureInitialized(aXDisplay)) {
+ 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.
+
+ if (!aXDisplay) {
+ NS_ERROR("X Display required for GLX Context provider");
+ return nullptr;
+ }
+
+ if (!aXWindow) {
+ NS_ERROR("X window required for GLX Context provider");
+ return nullptr;
+ }
+
+ int xscreen = DefaultScreen(aXDisplay);
+
+ ScopedXFree<GLXFBConfig> cfgs;
+ GLXFBConfig config;
+ int visid;
+ if (!GLContextGLX::FindFBConfigForWindow(aXDisplay, xscreen, aXWindow, &cfgs,
+ &config, &visid,
+ aHardwareWebRender)) {
+ return nullptr;
+ }
+
+ CreateContextFlags flags;
+ if (aHardwareWebRender) {
+ flags = CreateContextFlags::NONE; // WR needs GL3.2+
+ } else {
+ flags = CreateContextFlags::REQUIRE_COMPAT_PROFILE;
+ }
+ return GLContextGLX::CreateGLContext(
+ {{flags}, false}, XlibDisplay::Borrow(aXDisplay), aXWindow, config);
+}
+
+already_AddRefed<GLContext> GLContextProviderGLX::CreateForCompositorWidget(
+ CompositorWidget* aCompositorWidget, bool aHardwareWebRender,
+ bool aForceAccelerated) {
+ if (!aCompositorWidget) {
+ MOZ_ASSERT(false);
+ return nullptr;
+ }
+ GtkCompositorWidget* compWidget = aCompositorWidget->AsGTK();
+ MOZ_ASSERT(compWidget);
+
+ return CreateForWidget(DefaultXDisplay(), compWidget->XWindow(),
+ aHardwareWebRender, aForceAccelerated);
+}
+
+static bool ChooseConfig(GLXLibrary* glx, Display* display, int screen,
+ ScopedXFree<GLXFBConfig>* const out_scopedConfigArr,
+ GLXFBConfig* const out_config, int* const out_visid) {
+ ScopedXFree<GLXFBConfig>& scopedConfigArr = *out_scopedConfigArr;
+
+ const int attribs[] = {
+ LOCAL_GLX_RENDER_TYPE,
+ LOCAL_GLX_RGBA_BIT,
+ LOCAL_GLX_DRAWABLE_TYPE,
+ LOCAL_GLX_PIXMAP_BIT,
+ LOCAL_GLX_X_RENDERABLE,
+ X11True,
+ LOCAL_GLX_RED_SIZE,
+ 8,
+ LOCAL_GLX_GREEN_SIZE,
+ 8,
+ LOCAL_GLX_BLUE_SIZE,
+ 8,
+ LOCAL_GLX_ALPHA_SIZE,
+ 8,
+ LOCAL_GLX_DEPTH_SIZE,
+ 0,
+ LOCAL_GLX_STENCIL_SIZE,
+ 0,
+ 0,
+ };
+
+ int numConfigs = 0;
+ scopedConfigArr = glx->fChooseFBConfig(display, screen, attribs, &numConfigs);
+ if (!scopedConfigArr || !numConfigs) return false;
+
+ // Issues with glxChooseFBConfig selection and sorting:
+ // * ALPHA_SIZE is sorted as 'largest total RGBA bits first'. If we don't
+ // request
+ // alpha bits, we'll probably get RGBA anyways, since 32 is more than 24.
+ // * DEPTH_SIZE is sorted largest first, including for `0` inputs.
+ // * STENCIL_SIZE is smallest first, but it might return `8` even though we
+ // ask for
+ // `0`.
+
+ // For now, we don't care about these. We *will* care when we do XPixmap
+ // sharing.
+
+ for (int i = 0; i < numConfigs; ++i) {
+ GLXFBConfig curConfig = scopedConfigArr[i];
+
+ int visid;
+ if (glx->fGetFBConfigAttrib(display, curConfig, LOCAL_GLX_VISUAL_ID,
+ &visid) != Success) {
+ continue;
+ }
+
+ if (!visid) continue;
+
+ *out_config = curConfig;
+ *out_visid = visid;
+ return true;
+ }
+
+ return false;
+}
+
+bool GLContextGLX::FindVisual(Display* display, int screen,
+ int* const out_visualId) {
+ if (!sGLXLibrary.EnsureInitialized(display)) {
+ return false;
+ }
+
+ XVisualInfo visualTemplate;
+ visualTemplate.screen = screen;
+
+ // Get all visuals of screen
+
+ int visualsLen = 0;
+ XVisualInfo* xVisuals =
+ XGetVisualInfo(display, VisualScreenMask, &visualTemplate, &visualsLen);
+ if (!xVisuals) {
+ return false;
+ }
+ const Range<XVisualInfo> visualInfos(xVisuals, visualsLen);
+ auto cleanupVisuals = MakeScopeExit([&] { XFree(xVisuals); });
+
+ // Get default visual info
+
+ Visual* defaultVisual = DefaultVisual(display, screen);
+ const auto defaultVisualInfo = [&]() -> const XVisualInfo* {
+ for (const auto& cur : visualInfos) {
+ if (cur.visual == defaultVisual) {
+ return &cur;
+ }
+ }
+ return nullptr;
+ }();
+ if (!defaultVisualInfo) {
+ MOZ_ASSERT(false);
+ return false;
+ }
+
+ const int bpp = 32;
+
+ for (auto& cur : visualInfos) {
+ const auto fnConfigMatches = [&](const int pname, const int expected) {
+ int actual;
+ if (sGLXLibrary.fGetConfig(display, &cur, pname, &actual)) {
+ return false;
+ }
+ return actual == expected;
+ };
+
+ // Check if visual is compatible.
+ if (cur.depth != bpp || cur.c_class != defaultVisualInfo->c_class) {
+ continue;
+ }
+
+ // Check if visual is compatible to GL requests.
+ if (fnConfigMatches(LOCAL_GLX_USE_GL, 1) &&
+ fnConfigMatches(LOCAL_GLX_DOUBLEBUFFER, 1) &&
+ fnConfigMatches(LOCAL_GLX_RED_SIZE, 8) &&
+ fnConfigMatches(LOCAL_GLX_GREEN_SIZE, 8) &&
+ fnConfigMatches(LOCAL_GLX_BLUE_SIZE, 8) &&
+ fnConfigMatches(LOCAL_GLX_ALPHA_SIZE, 8)) {
+ *out_visualId = cur.visualid;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool GLContextGLX::FindFBConfigForWindow(
+ Display* display, int screen, Window window,
+ ScopedXFree<GLXFBConfig>* const out_scopedConfigArr,
+ GLXFBConfig* const out_config, int* const out_visid, bool aWebRender) {
+ // 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;
+ }
+
+ ScopedXFree<GLXFBConfig>& cfgs = *out_scopedConfigArr;
+ int numConfigs;
+ const int webrenderAttribs[] = {LOCAL_GLX_ALPHA_SIZE,
+ windowAttrs.depth == 32 ? 8 : 0,
+ LOCAL_GLX_DOUBLEBUFFER, X11True, 0};
+
+ if (aWebRender) {
+ cfgs = sGLXLibrary.fChooseFBConfig(display, screen, webrenderAttribs,
+ &numConfigs);
+ } else {
+ cfgs = sGLXLibrary.fGetFBConfigs(display, screen, &numConfigs);
+ }
+
+ if (!cfgs) {
+ NS_WARNING("[GLX] glXGetFBConfigs() failed");
+ return false;
+ }
+ NS_ASSERTION(numConfigs > 0, "No FBConfigs found!");
+
+ 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 = X11None;
+ sGLXLibrary.fGetFBConfigAttrib(display, cfgs[i], LOCAL_GLX_VISUAL_ID,
+ &visid);
+ if (visid) {
+ // WebRender compatible GLX visual is configured
+ // at nsWindow::Create() by GLContextGLX::FindVisual(),
+ // just reuse it here.
+ if (windowVisualID == static_cast<VisualID>(visid)) {
+ *out_config = cfgs[i];
+ *out_visid = visid;
+ return true;
+ }
+ }
+ }
+
+ // We don't have a frame buffer visual which matches the GLX visual
+ // from GLContextGLX::FindVisual(). Let's try to find a near one and hope
+ // we're not on NVIDIA (Bug 1478454) as it causes X11 BadMatch error there.
+ for (int i = 0; i < numConfigs; i++) {
+ int visid = X11None;
+ sGLXLibrary.fGetFBConfigAttrib(display, cfgs[i], LOCAL_GLX_VISUAL_ID,
+ &visid);
+ if (visid) {
+ 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;
+ }
+ }
+ }
+
+ NS_WARNING("[GLX] Couldn't find a FBConfig matching window visual");
+ return false;
+}
+
+static already_AddRefed<GLContextGLX> CreateOffscreenPixmapContext(
+ const GLContextCreateDesc& desc, const IntSize& size,
+ nsACString* const out_failureId) {
+ GLXLibrary* glx = &sGLXLibrary;
+ auto display = glx->GetDisplay();
+
+ if (!display || !glx->EnsureInitialized(*display)) return nullptr;
+
+ int screen = DefaultScreen(display->get());
+
+ ScopedXFree<GLXFBConfig> scopedConfigArr;
+ GLXFBConfig config;
+ int visid;
+ if (!ChooseConfig(glx, *display, screen, &scopedConfigArr, &config, &visid)) {
+ NS_WARNING("Failed to find a compatible config.");
+ return nullptr;
+ }
+
+ Visual* visual;
+ int depth;
+ FindVisualAndDepth(*display, visid, &visual, &depth);
+
+ gfx::IntSize dummySize(16, 16);
+ const auto drawable =
+ XCreatePixmap(*display, DefaultRootWindow(display->get()),
+ dummySize.width, dummySize.height, depth);
+ if (!drawable) {
+ return nullptr;
+ }
+
+ // Handle slightly different signature between glXCreatePixmap and
+ // its pre-GLX-1.3 extension equivalent (though given the ABI, we
+ // might not need to).
+ const auto pixmap = glx->fCreatePixmap(*display, config, drawable, nullptr);
+ if (pixmap == 0) {
+ XFreePixmap(*display, drawable);
+ return nullptr;
+ }
+
+ auto fullDesc = GLContextDesc{desc};
+ fullDesc.isOffscreen = true;
+ return GLContextGLX::CreateGLContext(fullDesc, display, pixmap, config,
+ drawable);
+}
+
+/*static*/
+already_AddRefed<GLContext> GLContextProviderGLX::CreateHeadless(
+ const GLContextCreateDesc& desc, nsACString* const out_failureId) {
+ IntSize dummySize = IntSize(16, 16);
+ return CreateOffscreenPixmapContext(desc, dummySize, out_failureId);
+}
+
+/*static*/
+GLContext* GLContextProviderGLX::GetGlobalContext() {
+ // Context sharing not supported.
+ return nullptr;
+}
+
+/*static*/
+void GLContextProviderGLX::Shutdown() {}
+
+} // namespace mozilla::gl