1 files changed, 87 insertions, 0 deletions
diff --git a/vcl/skia/zone.cxx b/vcl/skia/zone.cxx
new file mode 100644
index 0000000000..f954173662
--- /dev/null
+++ b/vcl/skia/zone.cxx
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ */
+
+#include <skia/zone.hxx>
+
+#include <officecfg/Office/Common.hxx>
+#include <com/sun/star/util/XFlushable.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+
+#include <sal/log.hxx>
+#include <o3tl/unreachable.hxx>
+
+#include <vcl/skia/SkiaHelper.hxx>
+
+#include <config_skia.h>
+
+using namespace SkiaHelper;
+
+/**
+ * Called from a signal handler or watchdog thread if we get
+ * a crash or hang in some driver.
+ */
+void SkiaZone::hardDisable()
+{
+    // protect ourselves from double calling etc.
+    static bool bDisabled = false;
+    if (bDisabled)
+        return;
+
+    bDisabled = true;
+
+    // Instead of disabling Skia as a whole, only force the CPU-based
+    // raster mode, which should be safe as it does not use drivers.
+    std::shared_ptr<comphelper::ConfigurationChanges> xChanges(
+        comphelper::ConfigurationChanges::create());
+    officecfg::Office::Common::VCL::ForceSkiaRaster::set(true, xChanges);
+    xChanges->commit();
+
+    // Force synchronous config write
+    css::uno::Reference<css::util::XFlushable>(
+        css::configuration::theDefaultProvider::get(comphelper::getProcessComponentContext()),
+        css::uno::UNO_QUERY_THROW)
+        ->flush();
+}
+
+void SkiaZone::checkDebug(int nUnchanged, const CrashWatchdogTimingsValues& aTimingValues)
+{
+    SAL_INFO("vcl.watchdog", "Skia watchdog - unchanged "
+                                 << nUnchanged << " enter count " << enterCount()
+                                 << " breakpoints mid: " << aTimingValues.mnDisableEntries
+                                 << " max " << aTimingValues.mnAbortAfter);
+}
+
+const CrashWatchdogTimingsValues& SkiaZone::getCrashWatchdogTimingsValues()
+{
+    switch (renderMethodToUse())
+    {
+        case RenderVulkan:
+        case RenderMetal:
+        {
+#if defined(SK_RELEASE)
+            static const CrashWatchdogTimingsValues gpuValues = { 6, 20 }; /* 1.5s,  5s */
+#elif defined(SK_DEBUG)
+            static const CrashWatchdogTimingsValues gpuValues = { 60, 200 }; /* 15s,  50s */
+#else
+#error Unknown Skia debug/release setting.
+#endif
+            return gpuValues;
+        }
+        case RenderRaster:
+        {
+            // CPU-based operations with large images may take a noticeably long time,
+            // so use large values. CPU-based rendering shouldn't use any unstable drivers anyway.
+            static const CrashWatchdogTimingsValues rasterValues = { 600, 2000 }; /* 150s,  500s */
+            return rasterValues;
+        }
+    }
+    O3TL_UNREACHABLE;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */