Vulkan: enable textureCompressionBC when the device supports it (#716)

Guest BC1–BC7 textures can be sampled directly when the feature is available; warn when it is not.

src/SharpEmu.Libs/VideoOut/VulkanVideoPresenter.cs

@@ -4131,6 +4131,7 @@ internal static unsafe class VulkanVideoPresenter
                 ShaderStorageImageExtendedFormats = supportedFeatures.ShaderStorageImageExtendedFormats,
                 ShaderStorageImageReadWithoutFormat = supportedFeatures.ShaderStorageImageReadWithoutFormat,
                 ShaderStorageImageWriteWithoutFormat = supportedFeatures.ShaderStorageImageWriteWithoutFormat,
+                TextureCompressionBC = supportedFeatures.TextureCompressionBC,
                 RobustBufferAccess = supportedFeatures.RobustBufferAccess,
             };
 
@@ -4170,6 +4171,13 @@ internal static unsafe class VulkanVideoPresenter
                     "translated shaders using unformatted storage image load/store will fail.");
             }
 
+            if (!supportedFeatures.TextureCompressionBC)
+            {
+                Console.Error.WriteLine(
+                    "[LOADER][WARN] GPU does not support textureCompressionBC " +
+                    "guest BC1-BC7 textures cannot be sampled directly.");
+            }
+
             var maintenance8Features = new PhysicalDeviceMaintenance8FeaturesKHR
             {
                 SType = StructureType.PhysicalDeviceMaintenance8FeaturesKhr,