test at least creating Metal context when initializing Skia

Change-Id: Ic00236e7876039c3f5c0c1e719e829b844d1d2e4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121271
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

1 files changed, 40 insertions, 14 deletions

diff --git a/vcl/skia/SkiaHelper.cxx b/vcl/skia/SkiaHelper.cxx
index 6881ad1cbf83..458f415befa4 100644
--- a/vcl/skia/SkiaHelper.cxx
+++ b/vcl/skia/SkiaHelper.cxx
@@ -158,7 +158,7 @@ static void writeSkiaRasterInfo()
     writeToLog(logFile, "Compiler", skia_compiler_name());
 }
 
-#ifdef SK_VULKAN
+#if defined(SK_VULKAN) || defined(SK_METAL)
 static std::unique_ptr<sk_app::WindowContext> getTemporaryWindowContext();
 #endif
 
@@ -170,6 +170,7 @@ static void checkDeviceDenylisted(bool blockDisable = false)
 
     SkiaZone zone;
 
+    bool useRaster = false;
     switch (renderMethodToUse())
     {
         case RenderVulkan:
@@ -204,32 +205,57 @@ static void checkDeviceDenylisted(bool blockDisable = false)
             if (denylisted && !blockDisable)
             {
                 disableRenderMethod(RenderVulkan);
-                writeSkiaRasterInfo();
+                useRaster = true;
             }
-            break;
 #else
             SAL_WARN("vcl.skia", "Vulkan support not built in");
             (void)blockDisable;
-            [[fallthrough]];
+            useRaster = true;
 #endif
+            break;
         }
         case RenderMetal:
+        {
 #ifdef SK_METAL
-            // Try to assume Metal always works, given that Mac doesn't have such as wide range of HW vendors as PC.
-            // If there turns out to be problems, handle it similarly to Vulkan.
-            SAL_INFO("vcl.skia", "Using Skia Metal mode");
-            writeSkiaMetalInfo();
-            break;
+            // First try if a GrDirectContext already exists.
+            std::unique_ptr<sk_app::WindowContext> temporaryWindowContext;
+            GrDirectContext* grDirectContext = sk_app::getMetalSharedGrDirectContext();
+            if (!grDirectContext)
+            {
+                // Create a temporary window context just to get the GrDirectContext,
+                // as an initial test of Metal functionality.
+                temporaryWindowContext = getTemporaryWindowContext();
+                grDirectContext = sk_app::getMetalSharedGrDirectContext();
+            }
+            if (grDirectContext) // Metal was initialized properly
+            {
+                // Try to assume Metal always works, given that Mac doesn't have such as wide range of HW vendors as PC.
+                // If there turns out to be problems, handle it similarly to Vulkan.
+                SAL_INFO("vcl.skia", "Using Skia Metal mode");
+                writeSkiaMetalInfo();
+            }
+            else
+            {
+                SAL_INFO("vcl.skia", "Metal could not be initialized");
+                disableRenderMethod(RenderMetal);
+                useRaster = true;
+            }
 #else
             SAL_WARN("vcl.skia", "Metal support not built in");
-            [[fallthrough]];
+            useRaster = true;
 #endif
+            break;
+        }
         case RenderRaster:
-            SAL_INFO("vcl.skia", "Using Skia raster mode");
-            // software, never denylisted
-            writeSkiaRasterInfo();
+            useRaster = true;
             break;
     }
+    if (useRaster)
+    {
+        SAL_INFO("vcl.skia", "Using Skia raster mode");
+        // software, never denylisted
+        writeSkiaRasterInfo();
+    }
     done = true;
 }
 
@@ -431,7 +457,7 @@ GrDirectContext* getSharedGrDirectContext()
     return nullptr;
 }
 
-#ifdef SK_VULKAN
+#if defined(SK_VULKAN) || defined(SK_METAL)
 static std::unique_ptr<sk_app::WindowContext> getTemporaryWindowContext()
 {
     if (createGpuWindowContextFunction == nullptr)