Merge pull request #4619 from AvaloniaUI/fixes/vmem-optimizations

Change GPU defaults

src/Avalonia.OpenGL/AngleOptions.cs

@@ -10,9 +10,6 @@ namespace Avalonia.OpenGL
 			DirectX11
         }
 
-        public List<PlatformApi> AllowedPlatformApis = new List<PlatformApi>
+        public IList<PlatformApi> AllowedPlatformApis { get; set; } = null;
-        {
-            PlatformApi.DirectX9
-        };
     }
 }

src/Avalonia.OpenGL/EglConsts.cs

@@ -186,6 +186,9 @@ namespace Avalonia.OpenGL
         public const int EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE = 0x3206;
         public const int EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE = 0x320A;
         public const int EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE = 0x345E;
+
+        public const int EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE = 0x320D;
+        public const int EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE = 0x320E;
         
         //EGL_ANGLE_platform_angle_d3d
         public const int EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE = 0x3209;

src/Avalonia.OpenGL/EglDisplay.cs

@@ -36,7 +36,11 @@ namespace Avalonia.OpenGL
                         throw new OpenGlException("eglGetPlatformDisplayEXT is not supported by libegl.dll");
 
                     var allowedApis = AvaloniaLocator.Current.GetService<AngleOptions>()?.AllowedPlatformApis
-                                      ?? new List<AngleOptions.PlatformApi> {AngleOptions.PlatformApi.DirectX9};
+                                      ?? new []
+                                      {
+                                          AngleOptions.PlatformApi.DirectX11, 
+                                          AngleOptions.PlatformApi.DirectX9
+                                      };
 
                     foreach (var platformApi in allowedApis)
                     {

src/Skia/Avalonia.Skia/SkiaOptions.cs

@@ -16,6 +16,10 @@ namespace Avalonia
         /// <summary>
         /// The maximum number of bytes for video memory to store textures and resources.
         /// </summary>
-        public long? MaxGpuResourceSizeBytes { get; set; }
+        /// <remarks>
+        /// This is set by default to the recommended value for Avalonia.
+        /// Setting this to null will give you the default Skia value.
+        /// </remarks>
+        public long? MaxGpuResourceSizeBytes { get; set; } = 1024 * 600 * 4 * 12; // ~28mb 12x 1024 x 600 textures. 
     }
 }