Merge pull request #2 from thegoldenmule/master

Added crop method

Plugins/TextureOps/TextureOps.cs

@@ -247,6 +247,54 @@ public static bool SaveImage( byte[] sourceBytes, string imagePath )
 	#endregion
 
 	#region Texture Operations
+	public static Texture2D Crop( Texture sourceTex, int leftOffset, int topOffset, int width, int height, TextureFormat format = TextureFormat.RGBA32, Options options = new Options() )
+	{
+		if( sourceTex == null )
+			throw new ArgumentException( "Parameter 'sourceTex' is null!" );
+
+		if( width <= 0 || width > sourceTex.width )
+			width = sourceTex.width;
+		if( height <= 0 || height > sourceTex.height )
+			height = sourceTex.height;
+		if( leftOffset <= 0 )
+			leftOffset = 0;
+		else if( leftOffset + width > sourceTex.width )
+			leftOffset = sourceTex.width - width;
+		if( topOffset <= 0 )
+			topOffset = 0;
+		else if( topOffset + height > sourceTex.height )
+			topOffset = sourceTex.height - height;
+
+		Texture2D result = null;
+
+		RenderTexture rt = RenderTexture.GetTemporary( sourceTex.width, sourceTex.height );
+		RenderTexture activeRT = RenderTexture.active;
+
+		try
+		{
+			Graphics.Blit( sourceTex, rt );
+			RenderTexture.active = rt;
+
+			result = new Texture2D( width, height, format, options.generateMipmaps, options.linearColorSpace );
+			result.ReadPixels( new Rect( leftOffset, sourceTex.height - topOffset - height, width, height ), 0, 0, false );
+			result.Apply( options.generateMipmaps, options.markNonReadable );
+		}
+		catch( Exception e )
+		{
+			Debug.LogException( e );
+
+			Object.Destroy( result );
+			result = null;
+		}
+		finally
+		{
+			RenderTexture.active = activeRT;
+			RenderTexture.ReleaseTemporary( rt );
+		}
+
+		return result;
+	}
+
 	public static Texture2D Scale( Texture sourceTex, int targetWidth, int targetHeight, TextureFormat format = TextureFormat.RGBA32, Options options = new Options() )
 	{
 		if( sourceTex == null )
@@ -329,7 +377,7 @@ public static bool SaveImage( byte[] sourceBytes, string imagePath )
 
 		return result;
 	}
-
+	
 	public static Texture2D[] Slice( Texture sourceTex, int sliceTexWidth, int sliceTexHeight, TextureFormat format = TextureFormat.RGBA32, Options options = new Options() )
 	{
 		if( sourceTex == null )

README.md

@@ -42,6 +42,8 @@ Simply import [TextureOps.unitypackage](https://github.com/yasirkula/UnityTextur
 
 **NOTE:** on some Android devices, these functions may not work correctly when called with a *sourceTex* that was created in the same frame. Therefore, if you'd like to call these functions immediately after *LoadImage*, consider instead waiting for at least one frame. You can use `yield return null;` in a coroutine to wait for one frame.
 
+`Texture2D[] TextureOps.Crop( Texture2D, sourceTex, int leftOffset, int topOffset, int width, int height, TextureFormat format = TextureFormat.RGBA32, TextureOps.Options options )`: crops sourceTex and returns the cropped texture.
+
 `Texture2D TextureOps.Scale( Texture2D sourceTex, int targetWidth, int targetHeight, TextureFormat format = TextureFormat.RGBA32, TextureOps.Options options )`: scales *sourceTex* to the specified size and returns the scaled texture. sourceTex's aspect ratio may not be preserved.
 
 `Texture2D TextureOps.ScaleFill( Texture2D sourceTex, int targetWidth, int targetHeight, Color32 fillColor, TextureFormat format = TextureFormat.RGBA32, TextureOps.Options options )`: scales *sourceTex* to the specified size and returns the scaled texture. sourceTex's aspect ratio is preserved and blank space is filled with *fillColor*.