2f107db...5202af9

Barotrauma/BarotraumaClient/Source/Utils/TextureLoader.cs

@@ -1,6 +1,7 @@
 using Microsoft.Xna.Framework.Graphics;
 using System;
 using System.IO;
+using System.Threading;
 using Color = Microsoft.Xna.Framework.Color;
 
 namespace Barotrauma
@@ -48,7 +49,7 @@ namespace Barotrauma
                     var texture = Texture2D.FromStream(_graphicsDevice, fileStream);
                     if (preMultiplyAlpha)
                     {
-                        PreMultiplyAlpha(texture);
+                        PreMultiplyAlpha(ref texture);
                     }
                     return texture;
                 }
@@ -66,7 +67,7 @@ namespace Barotrauma
             try
             {
                 var texture = Texture2D.FromStream(_graphicsDevice, fileStream);
-                PreMultiplyAlpha(texture);
+                PreMultiplyAlpha(ref texture);
                 return texture;
             }
             catch (Exception e)
@@ -76,37 +77,40 @@ namespace Barotrauma
             }
         }
 
-        private static void PreMultiplyAlpha(Texture2D texture)
+        private static void PreMultiplyAlpha(ref Texture2D texture)
         {
-            // Setup a render target to hold our final texture which will have premulitplied alpha values
-            using (RenderTarget2D renderTarget = new RenderTarget2D(_graphicsDevice, texture.Width, texture.Height))
+            UInt32[] data = new UInt32[texture.Width * texture.Height];
+            texture.GetData(data);
+
+            for (int i = 0; i < data.Length; i++)
             {
-                Viewport viewportBackup = _graphicsDevice.Viewport;
-                _graphicsDevice.SetRenderTarget(renderTarget);
-                _graphicsDevice.Clear(Color.Black);
-
-                // Multiply each color by the source alpha, and write in just the color values into the final texture
-                _spriteBatch.Begin(SpriteSortMode.Immediate, BlendColorBlendState);
-                _spriteBatch.Draw(texture, texture.Bounds, Color.White);
-                _spriteBatch.End();
-
-                // Now copy over the alpha values from the source texture to the final one, without multiplying them
-                _spriteBatch.Begin(SpriteSortMode.Immediate, BlendAlphaBlendState);
-                _spriteBatch.Draw(texture, texture.Bounds, Color.White);
-                _spriteBatch.End();
-
-                // Release the GPU back to drawing to the screen
-                _graphicsDevice.SetRenderTarget(null);
-                _graphicsDevice.Viewport = viewportBackup;
-
-                // Store data from render target because the RenderTarget2D is volatile
-                Color[] data = new Color[texture.Width * texture.Height];
-                renderTarget.GetData(data);
-
-                // Unset texture from graphic device and set modified data back to it
-                _graphicsDevice.Textures[0] = null;
-                texture.SetData(data);
+                uint a = (data[i] & 0xff000000) >> 24;
+                if (a == 0)
+                {
+                    data[i] = 0;
+                    continue;
+                }
+                else if (a == uint.MaxValue)
+                {
+                    continue;
+                }
+                uint r = (data[i] & 0x00ff0000) >> 16;
+                uint g = (data[i] & 0x0000ff00) >> 8;
+                uint b = (data[i] & 0x000000ff);
+                // Monogame 3.7 needs the line below.
+                a *= a; a /= 255;
+                b *= a; b /= 255;
+                g *= a; g /= 255;
+                r *= a; r /= 255;
+                data[i] = (a << 24) | (r << 16) | (g << 8) | b;
             }
+            
+            //not sure why this is needed, but it seems to cut the memory usage of the game almost in half
+            //GetData/SetData might be leaking memory?
+            int width = texture.Width; int height = texture.Height;
+            texture.Dispose();
+            texture = new Texture2D(_graphicsDevice, width, height);
+            texture.SetData(data);
         }