Image loading improvements:

- Added TextureExtensions.PremultipliedCopy for textures
- Create a premultiplied copy of UiParser images to support usage with KNI

CHANGELOG.md

@@ -17,9 +17,14 @@ Jump to version:
 
 ## 7.1.1 (In Development)
 
+### MLEM
+Additions
+- Added TextureExtensions.PremultipliedCopy for textures
+
 ### MLEM.Ui
 Improvements
 - Construct images in UiParser.ParseImage on the main thread to support usage with KNI
+- Create a premultiplied copy of UiParser images to support usage with KNI
 
 ## 7.1.0
 

MLEM.Data/Content/Texture2DReader.cs

@@ -17,18 +17,8 @@ namespace MLEM.Data.Content {
 #endif
 
             // premultiply the texture's color to be in line with the pipeline's texture reader
-            using (var texture = Texture2D.FromStream(manager.GraphicsDevice, stream)) {
-                var ret = new Texture2D(manager.GraphicsDevice, texture.Width, texture.Height);
-                using (var textureData = texture.GetTextureData()) {
-                    using (var retData = ret.GetTextureData()) {
-                        for (var x = 0; x < ret.Width; x++) {
-                            for (var y = 0; y < ret.Height; y++)
-                                retData[x, y] = Color.FromNonPremultiplied(textureData[x, y].ToVector4());
-                        }
-                    }
-                }
-                return ret;
-            }
+            using (var texture = Texture2D.FromStream(manager.GraphicsDevice, stream))
+                return texture.PremultipliedCopy();
         }
 
         /// <inheritdoc />

MLEM.Ui/Parsers/UiParser.cs

@@ -156,8 +156,10 @@ namespace MLEM.Ui.Parsers {
                     if (!bytesNull) {
                         Texture2D tex;
                         lock (bytesLock) {
-                            using (var stream = new MemoryStream(bytes))
-                                tex = Texture2D.FromStream(this.GraphicsDevice, stream);
+                            using (var stream = new MemoryStream(bytes)) {
+                                using (var read = Texture2D.FromStream(this.GraphicsDevice, stream))
+                                    tex = read.PremultipliedCopy();
+                            }
                             bytes = null;
                         }
                         image = new TextureRegion(tex);

MLEM/Textures/TextureExtensions.cs

@@ -18,6 +18,24 @@ namespace MLEM.Textures {
             return new TextureData(texture);
         }
 
+        /// <summary>
+        /// Creates and returns a copy of the given <paramref name="texture"/> with all colors converted to premultiplied alpha, which is the format that MonoGame's content pipeline loads textures in. This method uses <see cref="Color.FromNonPremultiplied(Microsoft.Xna.Framework.Vector4)"/> for all pixels in the <paramref name="texture"/>.
+        /// </summary>
+        /// <param name="texture">The texture of which to create a premultiplied copy.</param>
+        /// <returns>The premultiplied copy of the <paramref name="texture"/>.</returns>
+        public static Texture2D PremultipliedCopy(this Texture2D texture) {
+            var ret = new Texture2D(texture.GraphicsDevice, texture.Width, texture.Height);
+            using (var textureData = texture.GetTextureData()) {
+                using (var retData = ret.GetTextureData()) {
+                    for (var x = 0; x < ret.Width; x++) {
+                        for (var y = 0; y < ret.Height; y++)
+                            retData[x, y] = Color.FromNonPremultiplied(textureData[x, y].ToVector4());
+                    }
+                }
+            }
+            return ret;
+        }
+
         /// <summary>
         /// A struct that represents the data of a texture, accessed through <see cref="TextureExtensions.GetTextureData"/>.
         /// </summary>