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<h1 class="file-heading">File: src/pixi/renderers/canvas/utils/CanvasTinter.js</h1>
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<pre class="code prettyprint linenums">
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/**
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* @author Mat Groves
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*
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*
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*/
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PIXI.CanvasTinter = function()
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{
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/// this.textureCach
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};
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//PIXI.CanvasTinter.cachTint = true;
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PIXI.CanvasTinter.getTintedTexture = function(sprite, color)
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{
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//
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// cach on sprite
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// cach on texture
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// no cache
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var texture = sprite.texture;
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color = PIXI.CanvasTinter.roundColor(color);
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var stringColor = "#" + ("00000" + ( color | 0).toString(16)).substr(-6);
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texture.tintCache = texture.tintCache || {};
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if(texture.tintCache[stringColor]) return texture.tintCache[stringColor];
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// clone texture..
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var canvas = PIXI.CanvasTinter.canvas || document.createElement("canvas");
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//PIXI.CanvasTinter.tintWithPerPixel(texture, stringColor, canvas);
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PIXI.CanvasTinter.tintMethod(texture, color, canvas);
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if(PIXI.CanvasTinter.convertTintToImage)
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{
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// is this better?
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var tintImage = new Image();
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tintImage.src = canvas.toDataURL();
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texture.tintCache[stringColor] = tintImage;
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}
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else
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{
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texture.tintCache[stringColor] = canvas;
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// if we are not converting the texture to an image then we need to lose the refferance to the canvas
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PIXI.CanvasTinter.canvas = null;
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}
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return canvas;
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};
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PIXI.CanvasTinter.tintWithMultiply = function(texture, color, canvas)
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{
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var context = canvas.getContext( "2d" );
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var frame = texture.frame;
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canvas.width = frame.width;
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canvas.height = frame.height;
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context.fillStyle = "#" + ("00000" + ( color | 0).toString(16)).substr(-6);
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context.fillRect(0, 0, frame.width, frame.height);
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context.globalCompositeOperation = "multiply";
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context.drawImage(texture.baseTexture.source,
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frame.x,
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frame.y,
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frame.width,
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frame.height,
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0,
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0,
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frame.width,
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frame.height);
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context.globalCompositeOperation = "destination-atop";
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context.drawImage(texture.baseTexture.source,
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frame.x,
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frame.y,
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frame.width,
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frame.height,
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0,
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0,
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frame.width,
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frame.height);
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};
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PIXI.CanvasTinter.tintWithOverlay = function(texture, color, canvas)
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{
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var context = canvas.getContext( "2d" );
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var frame = texture.frame;
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canvas.width = frame.width;
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canvas.height = frame.height;
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context.globalCompositeOperation = "copy";
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context.fillStyle = "#" + ("00000" + ( color | 0).toString(16)).substr(-6);
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context.fillRect(0, 0, frame.width, frame.height);
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context.globalCompositeOperation = "destination-atop";
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context.drawImage(texture.baseTexture.source,
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frame.x,
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frame.y,
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frame.width,
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frame.height,
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0,
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0,
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frame.width,
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frame.height);
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//context.globalCompositeOperation = "copy";
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};
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PIXI.CanvasTinter.tintWithPerPixel = function(texture, color, canvas)
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{
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var context = canvas.getContext( "2d" );
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var frame = texture.frame;
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canvas.width = frame.width;
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canvas.height = frame.height;
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context.globalCompositeOperation = "copy";
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context.drawImage(texture.baseTexture.source,
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frame.x,
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frame.y,
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frame.width,
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frame.height,
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0,
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0,
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frame.width,
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frame.height);
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var rgbValues = PIXI.hex2rgb(color);
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var r = rgbValues[0], g = rgbValues[1], b = rgbValues[2];
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var pixelData = context.getImageData(0, 0, frame.width, frame.height);
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var pixels = pixelData.data;
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for (var i = 0; i < pixels.length; i += 4)
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{
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pixels[i+0] *= r;
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pixels[i+1] *= g;
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pixels[i+2] *= b;
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}
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context.putImageData(pixelData, 0, 0);
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};
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PIXI.CanvasTinter.roundColor = function(color)
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{
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var step = PIXI.CanvasTinter.cacheStepsPerColorChannel;
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var rgbValues = PIXI.hex2rgb(color);
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rgbValues[0] = Math.round(rgbValues[0] * step) / step;
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rgbValues[1] = Math.round(rgbValues[1] * step) / step;
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rgbValues[2] = Math.round(rgbValues[2] * step) / step;
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return PIXI.rgb2hex(rgbValues);
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};
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PIXI.CanvasTinter.cacheStepsPerColorChannel = 8;
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PIXI.CanvasTinter.convertTintToImage = false;
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PIXI.CanvasTinter.canUseMultiply = PIXI.canUseNewCanvasBlendModes();
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PIXI.CanvasTinter.tintMethod = PIXI.CanvasTinter.canUseMultiply ? PIXI.CanvasTinter.tintWithMultiply : PIXI.CanvasTinter.tintWithPerPixel;
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</pre>
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