46 lines
1.6 KiB
Haxe
Executable File
46 lines
1.6 KiB
Haxe
Executable File
package haxework.gui.utils;
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import flash.geom.Point;
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import flash.filters.ColorMatrixFilter;
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import flash.geom.ColorTransform;
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import flash.display.BitmapData;
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class BitmapUtil {
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private static var cache:Map<BitmapData, Map<String, BitmapData>> = new Map<BitmapData, Map<String, BitmapData>>();
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private static function fromCache(image:BitmapData, key:String):Null<BitmapData> {
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return cache.exists(image) && cache.get(image).exists(key) ? cache.get(image).get(key) : null;
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}
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private static function toCache(image:BitmapData, key:String, value:BitmapData):Void {
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if (!cache.exists(image)) cache.set(image, new Map<String, BitmapData>());
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cache.get(image).set(key, value);
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}
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public static function multiply(image:BitmapData, m:Float):BitmapData {
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var result = fromCache(image, "multiply:" + m);
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if (result != null) return result;
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var ct:ColorTransform = new ColorTransform(m, m, m, 1.0, 0, 0, 0);
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var out:BitmapData = image.clone();
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out.colorTransform(out.rect, ct);
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toCache(image, "multiply:" + m, out);
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return out;
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}
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public static function grayscale(image:BitmapData, m:Float):BitmapData {
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var result = fromCache(image, "grayscale:" + m);
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if (result != null) return result;
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var matrix:Array<Float> = [];
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matrix = matrix.concat([m, m, m, 0, 0]);
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matrix = matrix.concat([m, m, m, 0, 0]);
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matrix = matrix.concat([m, m, m, 0, 0]);
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matrix = matrix.concat([0, 0, 0, 1, 0]);
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var cmf:ColorMatrixFilter = new ColorMatrixFilter(matrix);
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var out:BitmapData = image.clone();
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out.applyFilter(out, out.rect, new Point(0,0), cmf);
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toCache(image, "grayscale:" + m, out);
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return out;
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}
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} |