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    <p>Very possible to do with a ColorMatrixFilter, by building the matrix with a 255 offset on the red channel (but an identity matrix otherwise).</p> <p>This sample Document class assumes the FLA library has a 720 x 480 exported symbol "GradientBMD" which is a flash.display.BitmapData subclass:</p> <pre><code>package { import flash.display.Sprite; import flash.display.Bitmap; import flash.display.BitmapData; import flash.geom.Point; import flash.filters.*; public class GreyscaleDemo extends Sprite { public function GreyscaleDemo() { var bmd:BitmapData = new GradientBMD(720,480); var matrix:Array = new Array(); matrix = matrix.concat([1,0,0,0,255]); matrix = matrix.concat([0,1,0,0,0]); matrix = matrix.concat([0,0,1,0,0]); matrix = matrix.concat([0,0,0,1,0]); var colorFilter:ColorMatrixFilter = new ColorMatrixFilter(matrix); bmd.applyFilter(bmd, bmd.rect, new Point(0,0), colorFilter); var bitmap:Bitmap = new Bitmap(bmd); this.addChild(bitmap); } } } </code></pre> <p>You could also create a new bitmapData filled with the color you want the gradient to ramp to (in place of black) and copy it into your gradient with BlendMode.ADD:</p> <pre><code>package { import flash.display.Sprite; import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.BlendMode; import flash.geom.Point; public class GreyscaleDemo extends Sprite { public function GreyscaleDemo() { var bmd:BitmapData = new GradientBMD(720,480); var bitmap:Bitmap = new Bitmap(bmd); this.addChild(bitmap); var bmd2:BitmapData = new BitmapData(720, 480, false, 0xFF0000); bmd.draw(bmd2, null, null, BlendMode.ADD, bmd.rect,false); } } } </code></pre>
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    1. COIn the ColorMatrixFilter example, I special cased it for red. Obviously you can tint your gradient to any arbitrary RGBA color by setting the offsets of each channel. I moved the filter solution to the top of my response because it is the best way to do it if you're tinting to a solid color. You would use the second solution if the tint were non uniform in some way (i.e. you had a second tint bitmap to apply).
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    2. COthanks! Since I deal with a lot of transparencies ColorMatrix filter works best. Posted my final solution below - works well with colored as well as grayscale images.
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      1. USAndrei Taraschuk
 

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