topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

#graphic-flex-image-effects-05-Flex-ColorBurnTest.ax

#graphic-flex-image-effects-05-Flex-ColorBurnTest.ax [swf] [flash] flex


  package {
  
          import flash.display.Bitmap;
          import flash.display.BitmapData;
          import flash.display.BlendMode;
          import flash.display.Shader;
          import flash.filters.ShaderFilter;
          import flash.events.Event;
          import flash.geom.Point;
  
          [SWF(width=1200, height=600, backgroundColor=0x000000)]

Demonstrates use of shader for new blend modes using a Color Burn shader with opacity settings.


  
          public class @ax-graphic-flex-image-effects-05-Flex-ColorBurnTest extends graphic_flex_image_effects_05_Flex_DualImageTest {
  
                  private var _shaderProxy:graphic_flex_image_effects_05_Flex_ShaderProxy;

Method that is called once both images load in super class. This sets up loading of shader, or applies shader if bytes have been embedded.


  
                  override protected function operateOnImages():void {
                          // update path if shader is kept in different directory
                          _shaderProxy = new graphic_flex_image_effects_05_Flex_ShaderProxy("graphic-flex-image-effects-05-assets-colorBurn.pbj");
                          if (_shaderProxy.shader == null) {
                                  _shaderProxy.addEventListener(Event.COMPLETE, onShaderLoaded);
                          } else {
                                  applyShader();
                          }
                  }

Copies the two loaded bitmaps, stacks the copies and applies the blend mode shader.


  
                  private function applyShader():void {
                          var bitmap0:Bitmap = getChildAt(0) as Bitmap;
                          var bitmap1:Bitmap = getChildAt(1) as Bitmap;
                          // two new bitmaps showing the loaded data
                          var bottomBitmap:Bitmap = new Bitmap(bitmap0.bitmapData);
                          var topBitmap:Bitmap = new Bitmap(bitmap1.bitmapData);
                          addChild(bottomBitmap);
                          addChild(topBitmap);
                          // places both new bitmaps at the right
                          topBitmap.x = bottomBitmap.x = bitmap1.x + bitmap1.width;
                          // sets the blend mode alpha and applies the shader
                          _shaderProxy.percent = 0.6;
                          topBitmap.blendShader = _shaderProxy.shader;
                  }

Handler for when the shader completes loading. Calls applyShader().
parameter: event Event dispatched by ShaderProxy.


  
                  private function onShaderLoaded(event:Event):void {
                          applyShader();
                  }
  
          }
  
  }

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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