report memory usage for textures

OpenRA.FileFormats/Graphics/IGraphicsDevice.cs

@@ -35,7 +35,8 @@ namespace OpenRA.FileFormats.Graphics
 		ITexture CreateTexture();
 		IShader CreateShader( string name );
 
-		Size WindowSize { get; }
+		Size WindowSize { get; }
+		int GpuMemoryUsed { get; }
 
 		void Clear( Color color );
 		void Present( IInputHandler inputHandler );

OpenRA.Renderer.Cg/GraphicsDevice.cs

@@ -317,6 +317,9 @@ namespace OpenRA.Renderer.Cg
 		public IIndexBuffer CreateIndexBuffer( int size ) { return new IndexBuffer( this, size ); }
 		public ITexture CreateTexture() { return new Texture( this ); }
 		public ITexture CreateTexture( Bitmap bitmap ) { return new Texture( this, bitmap ); }
-		public IShader CreateShader( string name ) { return new Shader( this, name ); }
+		public IShader CreateShader( string name ) { return new Shader( this, name ); }
+
+
+		public int GpuMemoryUsed { get { return 0; } }
 	}
 }

OpenRA.Renderer.Gl/GraphicsDevice.cs

@@ -310,6 +310,8 @@ namespace OpenRA.Renderer.Glsl
 		public IIndexBuffer CreateIndexBuffer( int size ) { return new IndexBuffer( this, size ); }
 		public ITexture CreateTexture() { return new Texture( this ); }
 		public ITexture CreateTexture( Bitmap bitmap ) { return new Texture( this, bitmap ); }
-		public IShader CreateShader( string name ) { return new Shader( this, name ); }
+		public IShader CreateShader( string name ) { return new Shader( this, name ); }
+
+		public int GpuMemoryUsed { get; internal set; }
 	}
 }

OpenRA.Renderer.Gl/Texture.cs

@@ -19,16 +19,22 @@ namespace OpenRA.Renderer.Glsl
 {
 	public class Texture : ITexture
 	{
-		internal int texture;
+		internal int texture;
+		internal int memory;
+		GraphicsDevice dev;
 		
 		public Texture(GraphicsDevice dev)
-		{
+		{
+			this.dev = dev;
+
 			Gl.glGenTextures(1, out texture);
 			GraphicsDevice.CheckGlError();
 		}
 		
 		public Texture(GraphicsDevice dev, Bitmap bitmap)
-		{
+		{
+			this.dev = dev;
+
 			Gl.glGenTextures(1, out texture);
 			GraphicsDevice.CheckGlError();
 			SetData(bitmap);
@@ -48,6 +54,18 @@ namespace OpenRA.Renderer.Glsl
 			GraphicsDevice.CheckGlError();
 			Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAX_LEVEL, 0);
 			GraphicsDevice.CheckGlError();
+		}
+
+		void UpdateMemoryUsage( int newSize )
+		{
+			if (newSize == memory)
+				return;
+
+			dev.GpuMemoryUsed -= memory;
+			memory = newSize;
+			dev.GpuMemoryUsed += memory;
+
+			Log.Write("debug", "GPU Memory: {0:F2} MiB", dev.GpuMemoryUsed / 1024 / 1024f);
 		}
 		
 		public void SetData(byte[] colors, int width, int height)
@@ -65,7 +83,9 @@ namespace OpenRA.Renderer.Glsl
 						0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, intPtr);
 					GraphicsDevice.CheckGlError();
 				}
-			}			
+			}
+
+			UpdateMemoryUsage(colors.Length);
 		}
 
 		// An array of RGBA
@@ -87,7 +107,9 @@ namespace OpenRA.Renderer.Glsl
 						0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, intPtr);
 					GraphicsDevice.CheckGlError();
 				}
-			}			
+			}
+
+			UpdateMemoryUsage(width * height * sizeof(uint));
 		}
 		
 		public void SetData(Bitmap bitmap)
@@ -107,7 +129,9 @@ namespace OpenRA.Renderer.Glsl
 			Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, bits.Width, bits.Height,
 				0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, bits.Scan0);        // todo: weird strides
 			GraphicsDevice.CheckGlError();
-			bitmap.UnlockBits(bits);
+			bitmap.UnlockBits(bits);
+
+			UpdateMemoryUsage(bitmap.Width * bitmap.Height * sizeof(uint));
 		}
 
 		bool IsPowerOf2(int v)

OpenRA.Renderer.Null/NullGraphicsDevice.cs

@@ -46,7 +46,9 @@ namespace OpenRA.Renderer.Null
 		public IIndexBuffer CreateIndexBuffer(int size) { return new NullIndexBuffer(); }
 		public ITexture CreateTexture() { return new NullTexture(); }
 		public ITexture CreateTexture(Bitmap bitmap) { return new NullTexture(); }
-		public IShader CreateShader(string name) { return new NullShader(); }
+		public IShader CreateShader(string name) { return new NullShader(); }
+
+		public int GpuMemoryUsed { get { return 0; } }
 	}
 	
 	public class NullIndexBuffer : IIndexBuffer