vkvg backend nearly ok, refresh problem

1 files changed, 12 insertions, 0 deletions

diff --git a/Backends/CairoBackend/src/GLDevice.cs b/Backends/CairoBackend/src/GLDevice.cs
index c7992b74..d90fe1a0 100644
--- a/Backends/CairoBackend/src/GLDevice.cs
+++ b/Backends/CairoBackend/src/GLDevice.cs
@@ -2,6 +2,9 @@
 //
 // This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
 using System;
+using Drawing2D;
+using OpenGL;
+using static OpenGL.Gl;
 
 namespace Crow.CairoBackend
 {
@@ -11,6 +14,15 @@ namespace Crow.CairoBackend
 		public void SetThreadAware (bool value) {
 			NativeMethods.cairo_gl_device_set_thread_aware (handle, value ? 1 : 0);
 		}
+		public virtual ISurface CreateSurface(int width, int height) {
+			uint tex = GenTexture ();
+			BindTexture (TextureTarget.Texture2d, tex);
+			TexImage2D (TextureTarget.Texture2d, 0, InternalFormat.Rgb, width, height,
+				0, PixelFormat.Rgb, PixelType.UnsignedByte, 0);
+			TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, NEAREST);
+			TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, NEAREST);
+			return new GLSurface (this, Content.ColorAlpha, tex, width, height);
+		}
 
 	}
 }