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11 commits
legacy ... master

Author SHA1 Message Date
Jacob Seidelin
fa4b9283f0 Merge branch 'master' of github.com:jseidelin/pixastic 2014-09-04 11:17:48 +02:00
Jacob Seidelin
d1b9ab563f fix convolve5x5 to not call convolve3x3 2014-09-04 11:17:28 +02:00
Jacob Seidelin
9bd3e7d71b Merge pull request #22 from phg1024/master 
added a fast mosaic effect
 2014-04-17 15:06:04 +02:00
Peihong Guo
b731aed0a9 added histogram equalization 2013-11-28 03:14:22 -06:00
Peihong Guo
eaacd74ea9 added a fast mosaic effect 2013-11-28 02:40:30 -06:00
Jacob Seidelin
0a99d49911 Merge pull request #14 from balaclark/master 
Allow pixastic.worker.control.js to be in a different location
 2013-06-05 13:48:43 -07:00
Bala Clark
5485a7c700 added worker control path option 2013-05-06 18:07:40 +02:00
Jacob Seidelin
5de8438968 Change sample picture 2013-02-19 23:40:38 +01:00
Jacob Seidelin
753f7cc0db ws 2013-02-19 11:15:32 +01:00
Jacob Seidelin
0a41a80bcc Pixastic rewrite - initial commit 2013-02-19 11:12:26 +01:00
Jacob Seidelin
643bc247eb Clean out old code 2013-02-19 11:10:22 +01:00
43 changed files with 2526 additions and 3240 deletions
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508
actions/blend.js
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@ -1,508 +0,0 @@
/*
* Pixastic Lib - Blend - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.blend = {
process : function(params) {
var amount = parseFloat(params.options.amount);
var mode = (params.options.mode || "normal").toLowerCase();
var image = params.options.image;
amount = Math.max(0,Math.min(1,amount));
if (!image) return false;
if (Pixastic.Client.hasCanvasImageData()) {
var rect = params.options.rect;
var data = Pixastic.prepareData(params);
var w = rect.width;
var h = rect.height;
params.useData = false;
var otherCanvas = document.createElement("canvas");
otherCanvas.width = params.canvas.width;
otherCanvas.height = params.canvas.height;
var otherCtx = otherCanvas.getContext("2d");
otherCtx.drawImage(image,0,0);
var params2 = {canvas:otherCanvas,options:params.options};
var data2 = Pixastic.prepareData(params2);
var dataDesc2 = params2.canvasData;
var p = w*h;
var pix = p*4;
var pix1, pix2;
var r1, g1, b1;
var r2, g2, b2;
var r3, g3, b3;
var r4, g4, b4;
var dataChanged = false;
switch (mode) {
case "normal" :
//while (p--) {
// data2[pix-=4] = data2[pix];
// data2[pix1=pix+1] = data2[pix1];
// data2[pix2=pix+2] = data2[pix2];
//}
break;
case "multiply" :
while (p--) {
data2[pix-=4] = data[pix] * data2[pix] / 255;
data2[pix1=pix+1] = data[pix1] * data2[pix1] / 255;
data2[pix2=pix+2] = data[pix2] * data2[pix2] / 255;
}
dataChanged = true;
break;
case "lighten" :
while (p--) {
if ((r1 = data[pix-=4]) > data2[pix])
data2[pix] = r1;
if ((g1 = data[pix1=pix+1]) > data2[pix1])
data2[pix1] = g1;
if ((b1 = data[pix2=pix+2]) > data2[pix2])
data2[pix2] = b1;
}
dataChanged = true;
break;
case "darken" :
while (p--) {
if ((r1 = data[pix-=4]) < data2[pix])
data2[pix] = r1;
if ((g1 = data[pix1=pix+1]) < data2[pix1])
data2[pix1] = g1;
if ((b1 = data[pix2=pix+2]) < data2[pix2])
data2[pix2] = b1;
}
dataChanged = true;
break;
case "darkercolor" :
while (p--) {
if (((r1 = data[pix-=4])*0.3+(g1 = data[pix1=pix+1])*0.59+(b1 = data[pix2=pix+2])*0.11) <= (data2[pix]*0.3+data2[pix1]*0.59+data2[pix2]*0.11)) {
data2[pix] = r1;
data2[pix1] = g1;
data2[pix2] = b1;
}
}
dataChanged = true;
break;
case "lightercolor" :
while (p--) {
if (((r1 = data[pix-=4])*0.3+(g1 = data[pix1=pix+1])*0.59+(b1 = data[pix2=pix+2])*0.11) > (data2[pix]*0.3+data2[pix1]*0.59+data2[pix2]*0.11)) {
data2[pix] = r1;
data2[pix1] = g1;
data2[pix2] = b1;
}
}
dataChanged = true;
break;
case "lineardodge" :
/*
otherCtx.globalCompositeOperation = "source-over";
otherCtx.drawImage(params.canvas, 0, 0);
otherCtx.globalCompositeOperation = "lighter";
otherCtx.drawImage(image, 0, 0);
*/
while (p--) {
if ((r3 = data[pix-=4] + data2[pix]) > 255)
data2[pix] = 255;
else
data2[pix] = r3;
if ((g3 = data[pix1=pix+1] + data2[pix1]) > 255)
data2[pix1] = 255;
else
data2[pix1] = g3;
if ((b3 = data[pix2=pix+2] + data2[pix2]) > 255)
data2[pix2] = 255;
else
data2[pix2] = b3;
}
dataChanged = true;
break;
case "linearburn" :
while (p--) {
if ((r3 = data[pix-=4] + data2[pix]) < 255)
data2[pix] = 0;
else
data2[pix] = (r3 - 255);
if ((g3 = data[pix1=pix+1] + data2[pix1]) < 255)
data2[pix1] = 0;
else
data2[pix1] = (g3 - 255);
if ((b3 = data[pix2=pix+2] + data2[pix2]) < 255)
data2[pix2] = 0;
else
data2[pix2] = (b3 - 255);
}
dataChanged = true;
break;
case "difference" :
while (p--) {
if ((r3 = data[pix-=4] - data2[pix]) < 0)
data2[pix] = -r3;
else
data2[pix] = r3;
if ((g3 = data[pix1=pix+1] - data2[pix1]) < 0)
data2[pix1] = -g3;
else
data2[pix1] = g3;
if ((b3 = data[pix2=pix+2] - data2[pix2]) < 0)
data2[pix2] = -b3;
else
data2[pix2] = b3;
}
dataChanged = true;
break;
case "screen" :
while (p--) {
data2[pix-=4] = (255 - ( ((255-data2[pix])*(255-data[pix])) >> 8));
data2[pix1=pix+1] = (255 - ( ((255-data2[pix1])*(255-data[pix1])) >> 8));
data2[pix2=pix+2] = (255 - ( ((255-data2[pix2])*(255-data[pix2])) >> 8));
}
dataChanged = true;
break;
case "exclusion" :
var div_2_255 = 2 / 255;
while (p--) {
data2[pix-=4] = (r1 = data[pix]) - (r1 * div_2_255 - 1) * data2[pix];
data2[pix1=pix+1] = (g1 = data[pix1]) - (g1 * div_2_255 - 1) * data2[pix1];
data2[pix2=pix+2] = (b1 = data[pix2]) - (b1 * div_2_255 - 1) * data2[pix2];
}
dataChanged = true;
break;
case "overlay" :
var div_2_255 = 2 / 255;
while (p--) {
if ((r1 = data[pix-=4]) < 128)
data2[pix] = data2[pix]*r1*div_2_255;
else
data2[pix] = 255 - (255-data2[pix])*(255-r1)*div_2_255;
if ((g1 = data[pix1=pix+1]) < 128)
data2[pix1] = data2[pix1]*g1*div_2_255;
else
data2[pix1] = 255 - (255-data2[pix1])*(255-g1)*div_2_255;
if ((b1 = data[pix2=pix+2]) < 128)
data2[pix2] = data2[pix2]*b1*div_2_255;
else
data2[pix2] = 255 - (255-data2[pix2])*(255-b1)*div_2_255;
}
dataChanged = true;
break;
case "softlight" :
var div_2_255 = 2 / 255;
while (p--) {
if ((r1 = data[pix-=4]) < 128)
data2[pix] = ((data2[pix]>>1) + 64) * r1 * div_2_255;
else
data2[pix] = 255 - (191 - (data2[pix]>>1)) * (255-r1) * div_2_255;
if ((g1 = data[pix1=pix+1]) < 128)
data2[pix1] = ((data2[pix1]>>1)+64) * g1 * div_2_255;
else
data2[pix1] = 255 - (191 - (data2[pix1]>>1)) * (255-g1) * div_2_255;
if ((b1 = data[pix2=pix+2]) < 128)
data2[pix2] = ((data2[pix2]>>1)+64) * b1 * div_2_255;
else
data2[pix2] = 255 - (191 - (data2[pix2]>>1)) * (255-b1) * div_2_255;
}
dataChanged = true;
break;
case "hardlight" :
var div_2_255 = 2 / 255;
while (p--) {
if ((r2 = data2[pix-=4]) < 128)
data2[pix] = data[pix] * r2 * div_2_255;
else
data2[pix] = 255 - (255-data[pix]) * (255-r2) * div_2_255;
if ((g2 = data2[pix1=pix+1]) < 128)
data2[pix1] = data[pix1] * g2 * div_2_255;
else
data2[pix1] = 255 - (255-data[pix1]) * (255-g2) * div_2_255;
if ((b2 = data2[pix2=pix+2]) < 128)
data2[pix2] = data[pix2] * b2 * div_2_255;
else
data2[pix2] = 255 - (255-data[pix2]) * (255-b2) * div_2_255;
}
dataChanged = true;
break;
case "colordodge" :
while (p--) {
if ((r3 = (data[pix-=4]<<8)/(255-(r2 = data2[pix]))) > 255 || r2 == 255)
data2[pix] = 255;
else
data2[pix] = r3;
if ((g3 = (data[pix1=pix+1]<<8)/(255-(g2 = data2[pix1]))) > 255 || g2 == 255)
data2[pix1] = 255;
else
data2[pix1] = g3;
if ((b3 = (data[pix2=pix+2]<<8)/(255-(b2 = data2[pix2]))) > 255 || b2 == 255)
data2[pix2] = 255;
else
data2[pix2] = b3;
}
dataChanged = true;
break;
case "colorburn" :
while (p--) {
if ((r3 = 255-((255-data[pix-=4])<<8)/data2[pix]) < 0 || data2[pix] == 0)
data2[pix] = 0;
else
data2[pix] = r3;
if ((g3 = 255-((255-data[pix1=pix+1])<<8)/data2[pix1]) < 0 || data2[pix1] == 0)
data2[pix1] = 0;
else
data2[pix1] = g3;
if ((b3 = 255-((255-data[pix2=pix+2])<<8)/data2[pix2]) < 0 || data2[pix2] == 0)
data2[pix2] = 0;
else
data2[pix2] = b3;
}
dataChanged = true;
break;
case "linearlight" :
while (p--) {
if ( ((r3 = 2*(r2=data2[pix-=4])+data[pix]-256) < 0) || (r2 < 128 && r3 < 0)) {
data2[pix] = 0
} else {
if (r3 > 255)
data2[pix] = 255;
else
data2[pix] = r3;
}
if ( ((g3 = 2*(g2=data2[pix1=pix+1])+data[pix1]-256) < 0) || (g2 < 128 && g3 < 0)) {
data2[pix1] = 0
} else {
if (g3 > 255)
data2[pix1] = 255;
else
data2[pix1] = g3;
}
if ( ((b3 = 2*(b2=data2[pix2=pix+2])+data[pix2]-256) < 0) || (b2 < 128 && b3 < 0)) {
data2[pix2] = 0
} else {
if (b3 > 255)
data2[pix2] = 255;
else
data2[pix2] = b3;
}
}
dataChanged = true;
break;
case "vividlight" :
while (p--) {
if ((r2=data2[pix-=4]) < 128) {
if (r2) {
if ((r3 = 255 - ((255-data[pix])<<8) / (2*r2)) < 0)
data2[pix] = 0;
else
data2[pix] = r3
} else {
data2[pix] = 0;
}
} else if ((r3 = (r4=2*r2-256)) < 255) {
if ((r3 = (data[pix]<<8)/(255-r4)) > 255)
data2[pix] = 255;
else
data2[pix] = r3;
} else {
if (r3 < 0)
data2[pix] = 0;
else
data2[pix] = r3
}
if ((g2=data2[pix1=pix+1]) < 128) {
if (g2) {
if ((g3 = 255 - ((255-data[pix1])<<8) / (2*g2)) < 0)
data2[pix1] = 0;
else
data2[pix1] = g3;
} else {
data2[pix1] = 0;
}
} else if ((g3 = (g4=2*g2-256)) < 255) {
if ((g3 = (data[pix1]<<8)/(255-g4)) > 255)
data2[pix1] = 255;
else
data2[pix1] = g3;
} else {
if (g3 < 0)
data2[pix1] = 0;
else
data2[pix1] = g3;
}
if ((b2=data2[pix2=pix+2]) < 128) {
if (b2) {
if ((b3 = 255 - ((255-data[pix2])<<8) / (2*b2)) < 0)
data2[pix2] = 0;
else
data2[pix2] = b3;
} else {
data2[pix2] = 0;
}
} else if ((b3 = (b4=2*b2-256)) < 255) {
if ((b3 = (data[pix2]<<8)/(255-b4)) > 255)
data2[pix2] = 255;
else
data2[pix2] = b3;
} else {
if (b3 < 0)
data2[pix2] = 0;
else
data2[pix2] = b3;
}
}
dataChanged = true;
break;
case "pinlight" :
while (p--) {
if ((r2=data2[pix-=4]) < 128)
if ((r1=data[pix]) < (r4=2*r2))
data2[pix] = r1;
else
data2[pix] = r4;
else
if ((r1=data[pix]) > (r4=2*r2-256))
data2[pix] = r1;
else
data2[pix] = r4;
if ((g2=data2[pix1=pix+1]) < 128)
if ((g1=data[pix1]) < (g4=2*g2))
data2[pix1] = g1;
else
data2[pix1] = g4;
else
if ((g1=data[pix1]) > (g4=2*g2-256))
data2[pix1] = g1;
else
data2[pix1] = g4;
if ((r2=data2[pix2=pix+2]) < 128)
if ((r1=data[pix2]) < (r4=2*r2))
data2[pix2] = r1;
else
data2[pix2] = r4;
else
if ((r1=data[pix2]) > (r4=2*r2-256))
data2[pix2] = r1;
else
data2[pix2] = r4;
}
dataChanged = true;
break;
case "hardmix" :
while (p--) {
if ((r2 = data2[pix-=4]) < 128)
if (255 - ((255-data[pix])<<8)/(2*r2) < 128 || r2 == 0)
data2[pix] = 0;
else
data2[pix] = 255;
else if ((r4=2*r2-256) < 255 && (data[pix]<<8)/(255-r4) < 128)
data2[pix] = 0;
else
data2[pix] = 255;
if ((g2 = data2[pix1=pix+1]) < 128)
if (255 - ((255-data[pix1])<<8)/(2*g2) < 128 || g2 == 0)
data2[pix1] = 0;
else
data2[pix1] = 255;
else if ((g4=2*g2-256) < 255 && (data[pix1]<<8)/(255-g4) < 128)
data2[pix1] = 0;
else
data2[pix1] = 255;
if ((b2 = data2[pix2=pix+2]) < 128)
if (255 - ((255-data[pix2])<<8)/(2*b2) < 128 || b2 == 0)
data2[pix2] = 0;
else
data2[pix2] = 255;
else if ((b4=2*b2-256) < 255 && (data[pix2]<<8)/(255-b4) < 128)
data2[pix2] = 0;
else
data2[pix2] = 255;
}
dataChanged = true;
break;
}
if (dataChanged)
otherCtx.putImageData(dataDesc2,0,0);
if (amount != 1 && !Pixastic.Client.hasGlobalAlpha()) {
var p = w*h;
var amount2 = amount;
var amount1 = 1 - amount;
while (p--) {
var pix = p*4;
var r = (data[pix] * amount1 + data2[pix] * amount2)>>0;
var g = (data[pix+1] * amount1 + data2[pix+1] * amount2)>>0;
var b = (data[pix+2] * amount1 + data2[pix+2] * amount2)>>0;
data[pix] = r;
data[pix+1] = g;
data[pix+2] = b;
}
params.useData = true;
} else {
var ctx = params.canvas.getContext("2d");
ctx.save();
ctx.globalAlpha = amount;
ctx.drawImage(
otherCanvas,
0,0,rect.width,rect.height,
rect.left,rect.top,rect.width,rect.height
);
ctx.globalAlpha = 1;
ctx.restore();
}
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

126
actions/blur.js
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@ -1,126 +0,0 @@
/*
* Pixastic Lib - Blur filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.blur = {
process : function(params) {
if (typeof params.options.fixMargin == "undefined")
params.options.fixMargin = true;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var dataCopy = Pixastic.prepareData(params, true)
/*
var kernel = [
[0.5, 1, 0.5],
[1, 2, 1],
[0.5, 1, 0.5]
];
*/
var kernel = [
[0, 1, 0],
[1, 2, 1],
[0, 1, 0]
];
var weight = 0;
for (var i=0;i<3;i++) {
for (var j=0;j<3;j++) {
weight += kernel[i][j];
}
}
weight = 1 / (weight*2);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var prevY = (y == 1) ? 0 : y-2;
var nextY = (y == h) ? y - 1 : y;
var offsetYPrev = prevY*w*4;
var offsetYNext = nextY*w*4;
var x = w;
do {
var offset = offsetY + (x*4-4);
var offsetPrev = offsetYPrev + ((x == 1) ? 0 : x-2) * 4;
var offsetNext = offsetYNext + ((x == w) ? x-1 : x) * 4;
data[offset] = (
/*
dataCopy[offsetPrev - 4]
+ dataCopy[offsetPrev+4]
+ dataCopy[offsetNext - 4]
+ dataCopy[offsetNext+4]
+
*/
(dataCopy[offsetPrev]
+ dataCopy[offset-4]
+ dataCopy[offset+4]
+ dataCopy[offsetNext]) * 2
+ dataCopy[offset] * 4
) * weight;
data[offset+1] = (
/*
dataCopy[offsetPrev - 3]
+ dataCopy[offsetPrev+5]
+ dataCopy[offsetNext - 3]
+ dataCopy[offsetNext+5]
+
*/
(dataCopy[offsetPrev+1]
+ dataCopy[offset-3]
+ dataCopy[offset+5]
+ dataCopy[offsetNext+1]) * 2
+ dataCopy[offset+1] * 4
) * weight;
data[offset+2] = (
/*
dataCopy[offsetPrev - 2]
+ dataCopy[offsetPrev+6]
+ dataCopy[offsetNext - 2]
+ dataCopy[offsetNext+6]
+
*/
(dataCopy[offsetPrev+2]
+ dataCopy[offset-2]
+ dataCopy[offset+6]
+ dataCopy[offsetNext+2]) * 2
+ dataCopy[offset+2] * 4
) * weight;
} while (--x);
} while (--y);
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " progid:DXImageTransform.Microsoft.Blur(pixelradius=1.5)";
if (params.options.fixMargin) {
params.image.style.marginLeft = (parseInt(params.image.style.marginLeft,10)||0) - 2 + "px";
params.image.style.marginTop = (parseInt(params.image.style.marginTop,10)||0) - 2 + "px";
}
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
}
}

77
actions/blurfast.js
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@ -1,77 +0,0 @@
/*
* Pixastic Lib - Blur Fast - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.blurfast = {
process : function(params) {
var amount = parseFloat(params.options.amount)||0;
var clear = !!(params.options.clear && params.options.clear != "false");
amount = Math.max(0,Math.min(5,amount));
if (Pixastic.Client.hasCanvas()) {
var rect = params.options.rect;
var ctx = params.canvas.getContext("2d");
ctx.save();
ctx.beginPath();
ctx.rect(rect.left, rect.top, rect.width, rect.height);
ctx.clip();
var scale = 2;
var smallWidth = Math.round(params.width / scale);
var smallHeight = Math.round(params.height / scale);
var copy = document.createElement("canvas");
copy.width = smallWidth;
copy.height = smallHeight;
var clear = false;
var steps = Math.round(amount * 20);
var copyCtx = copy.getContext("2d");
for (var i=0;i<steps;i++) {
var scaledWidth = Math.max(1,Math.round(smallWidth - i));
var scaledHeight = Math.max(1,Math.round(smallHeight - i));
copyCtx.clearRect(0,0,smallWidth,smallHeight);
copyCtx.drawImage(
params.canvas,
0,0,params.width,params.height,
0,0,scaledWidth,scaledHeight
);
if (clear)
ctx.clearRect(rect.left,rect.top,rect.width,rect.height);
ctx.drawImage(
copy,
0,0,scaledWidth,scaledHeight,
0,0,params.width,params.height
);
}
ctx.restore();
params.useData = false;
return true;
} else if (Pixastic.Client.isIE()) {
var radius = 10 * amount;
params.image.style.filter += " progid:DXImageTransform.Microsoft.Blur(pixelradius=" + radius + ")";
if (params.options.fixMargin || 1) {
params.image.style.marginLeft = (parseInt(params.image.style.marginLeft,10)||0) - Math.round(radius) + "px";
params.image.style.marginTop = (parseInt(params.image.style.marginTop,10)||0) - Math.round(radius) + "px";
}
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvas() || Pixastic.Client.isIE());
}
}

79
actions/brightness.js
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@ -1,79 +0,0 @@
/*
* Pixastic Lib - Brightness/Contrast filter - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.brightness = {
process : function(params) {
var brightness = parseInt(params.options.brightness,10) || 0;
var contrast = parseFloat(params.options.contrast)||0;
var legacy = !!(params.options.legacy && params.options.legacy != "false");
if (legacy) {
brightness = Math.min(150,Math.max(-150,brightness));
} else {
var brightMul = 1 + Math.min(150,Math.max(-150,brightness)) / 150;
}
contrast = Math.max(0,contrast+1);
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var p = w*h;
var pix = p*4, pix1, pix2;
var mul, add;
if (contrast != 1) {
if (legacy) {
mul = contrast;
add = (brightness - 128) * contrast + 128;
} else {
mul = brightMul * contrast;
add = - contrast * 128 + 128;
}
} else { // this if-then is not necessary anymore, is it?
if (legacy) {
mul = 1;
add = brightness;
} else {
mul = brightMul;
add = 0;
}
}
var r, g, b;
while (p--) {
if ((r = data[pix-=4] * mul + add) > 255 )
data[pix] = 255;
else if (r < 0)
data[pix] = 0;
else
data[pix] = r;
if ((g = data[pix1=pix+1] * mul + add) > 255 )
data[pix1] = 255;
else if (g < 0)
data[pix1] = 0;
else
data[pix1] = g;
if ((b = data[pix2=pix+2] * mul + add) > 255 )
data[pix2] = 255;
else if (b < 0)
data[pix2] = 0;
else
data[pix2] = b;
}
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

62
actions/coloradjust.js
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/*
* Pixastic Lib - Color adjust filter - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.coloradjust = {
process : function(params) {
var red = parseFloat(params.options.red) || 0;
var green = parseFloat(params.options.green) || 0;
var blue = parseFloat(params.options.blue) || 0;
red = Math.round(red*255);
green = Math.round(green*255);
blue = Math.round(blue*255);
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var p = rect.width*rect.height;
var pix = p*4, pix1, pix2;
var r, g, b;
while (p--) {
pix -= 4;
if (red) {
if ((r = data[pix] + red) < 0 )
data[pix] = 0;
else if (r > 255 )
data[pix] = 255;
else
data[pix] = r;
}
if (green) {
if ((g = data[pix1=pix+1] + green) < 0 )
data[pix1] = 0;
else if (g > 255 )
data[pix1] = 255;
else
data[pix1] = g;
}
if (blue) {
if ((b = data[pix2=pix+2] + blue) < 0 )
data[pix2] = 0;
else if (b > 255 )
data[pix2] = 255;
else
data[pix2] = b;
}
}
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData());
}
}

82
actions/colorhistogram.js
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/*
* Pixastic Lib - Histogram - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.colorhistogram = {
array256 : function(default_value) {
arr = [];
for (var i=0; i<256; i++) { arr[i] = default_value; }
return arr
},
process : function(params) {
var values = [];
if (typeof params.options.returnValue != "object") {
params.options.returnValue = {rvals:[], gvals:[], bvals:[]};
}
var paint = !!(params.options.paint);
var returnValue = params.options.returnValue;
if (typeof returnValue.values != "array") {
returnValue.rvals = [];
returnValue.gvals = [];
returnValue.bvals = [];
}
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
params.useData = false;
var rvals = this.array256(0);
var gvals = this.array256(0);
var bvals = this.array256(0);
var rect = params.options.rect;
var p = rect.width*rect.height;
var pix = p*4;
while (p--) {
rvals[data[pix-=4]]++;
gvals[data[pix+1]]++;
bvals[data[pix+2]]++;
}
returnValue.rvals = rvals;
returnValue.gvals = gvals;
returnValue.bvals = bvals;
if (paint) {
var ctx = params.canvas.getContext("2d");
var vals = [rvals, gvals, bvals];
for (var v=0;v<3;v++) {
var yoff = (v+1) * params.height / 3;
var maxValue = 0;
for (var i=0;i<256;i++) {
if (vals[v][i] > maxValue)
maxValue = vals[v][i];
}
var heightScale = params.height / 3 / maxValue;
var widthScale = params.width / 256;
if (v==0) ctx.fillStyle = "rgba(255,0,0,0.5)";
else if (v==1) ctx.fillStyle = "rgba(0,255,0,0.5)";
else if (v==2) ctx.fillStyle = "rgba(0,0,255,0.5)";
for (var i=0;i<256;i++) {
ctx.fillRect(
i * widthScale, params.height - heightScale * vals[v][i] - params.height + yoff,
widthScale, vals[v][i] * heightScale
);
}
}
}
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

63
actions/crop.js
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/*
* Pixastic Lib - Crop - v0.1.1
* Copyright (c) 2008-2009 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.crop = {
process : function(params) {
if (Pixastic.Client.hasCanvas()) {
var rect = params.options.rect;
var width = rect.width;
var height = rect.height;
var top = rect.top;
var left = rect.left;
if (typeof params.options.left != "undefined")
left = parseInt(params.options.left,10);
if (typeof params.options.top != "undefined")
top = parseInt(params.options.top,10);
if (typeof params.options.height != "undefined")
width = parseInt(params.options.width,10);
if (typeof params.options.height != "undefined")
height = parseInt(params.options.height,10);
if (left < 0) left = 0;
if (left > params.width-1) left = params.width-1;
if (top < 0) top = 0;
if (top > params.height-1) top = params.height-1;
if (width < 1) width = 1;
if (left + width > params.width)
width = params.width - left;
if (height < 1) height = 1;
if (top + height > params.height)
height = params.height - top;
var copy = document.createElement("canvas");
copy.width = params.width;
copy.height = params.height;
copy.getContext("2d").drawImage(params.canvas,0,0);
params.canvas.width = width;
params.canvas.height = height;
params.canvas.getContext("2d").clearRect(0,0,width,height);
params.canvas.getContext("2d").drawImage(copy,
left,top,width,height,
0,0,width,height
);
params.useData = false;
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvas();
}
}

37
actions/desaturate.js
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/*
* Pixastic Lib - Desaturation filter - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.desaturate = {
process : function(params) {
var useAverage = !!(params.options.average && params.options.average != "false");
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var p = w*h;
var pix = p*4, pix1, pix2;
if (useAverage) {
while (p--)
data[pix-=4] = data[pix1=pix+1] = data[pix2=pix+2] = (data[pix]+data[pix1]+data[pix2])/3
} else {
while (p--)
data[pix-=4] = data[pix1=pix+1] = data[pix2=pix+2] = (data[pix]*0.3 + data[pix1]*0.59 + data[pix2]*0.11);
}
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " gray";
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
}
}

115
actions/edges.js
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/*
* Pixastic Lib - Edge detection filter - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.edges = {
process : function(params) {
var mono = !!(params.options.mono && params.options.mono != "false");
var invert = !!(params.options.invert && params.options.invert != "false");
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var dataCopy = Pixastic.prepareData(params, true)
var c = -1/8;
var kernel = [
[c, c, c],
[c, 1, c],
[c, c, c]
];
weight = 1/c;
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var nextY = (y == h) ? y - 1 : y;
var prevY = (y == 1) ? 0 : y-2;
var offsetYPrev = prevY*w*4;
var offsetYNext = nextY*w*4;
var x = w;
do {
var offset = offsetY + (x*4-4);
var offsetPrev = offsetYPrev + ((x == 1) ? 0 : x-2) * 4;
var offsetNext = offsetYNext + ((x == w) ? x-1 : x) * 4;
var r = ((dataCopy[offsetPrev-4]
+ dataCopy[offsetPrev]
+ dataCopy[offsetPrev+4]
+ dataCopy[offset-4]
+ dataCopy[offset+4]
+ dataCopy[offsetNext-4]
+ dataCopy[offsetNext]
+ dataCopy[offsetNext+4]) * c
+ dataCopy[offset]
)
* weight;
var g = ((dataCopy[offsetPrev-3]
+ dataCopy[offsetPrev+1]
+ dataCopy[offsetPrev+5]
+ dataCopy[offset-3]
+ dataCopy[offset+5]
+ dataCopy[offsetNext-3]
+ dataCopy[offsetNext+1]
+ dataCopy[offsetNext+5]) * c
+ dataCopy[offset+1])
* weight;
var b = ((dataCopy[offsetPrev-2]
+ dataCopy[offsetPrev+2]
+ dataCopy[offsetPrev+6]
+ dataCopy[offset-2]
+ dataCopy[offset+6]
+ dataCopy[offsetNext-2]
+ dataCopy[offsetNext+2]
+ dataCopy[offsetNext+6]) * c
+ dataCopy[offset+2])
* weight;
if (mono) {
var brightness = (r*0.3 + g*0.59 + b*0.11)||0;
if (invert) brightness = 255 - brightness;
if (brightness < 0 ) brightness = 0;
if (brightness > 255 ) brightness = 255;
r = g = b = brightness;
} else {
if (invert) {
r = 255 - r;
g = 255 - g;
b = 255 - b;
}
if (r < 0 ) r = 0;
if (g < 0 ) g = 0;
if (b < 0 ) b = 0;
if (r > 255 ) r = 255;
if (g > 255 ) g = 255;
if (b > 255 ) b = 255;
}
data[offset] = r;
data[offset+1] = g;
data[offset+2] = b;
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

103
actions/edges2.js
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/*
* Pixastic Lib - Edge detection 2 - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*
* Contribution by Oliver Hunt (http://nerget.com/, http://nerget.com/canvas/edgeDetection.js). Thanks Oliver!
*
*/
Pixastic.Actions.edges2 = {
process : function(params) {
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var dataCopy = Pixastic.prepareData(params, true)
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w * 4;
var pixel = w4 + 4; // Start at (1,1)
var hm1 = h - 1;
var wm1 = w - 1;
for (var y = 1; y < hm1; ++y) {
// Prepare initial cached values for current row
var centerRow = pixel - 4;
var priorRow = centerRow - w4;
var nextRow = centerRow + w4;
var r1 = - dataCopy[priorRow] - dataCopy[centerRow] - dataCopy[nextRow];
var g1 = - dataCopy[++priorRow] - dataCopy[++centerRow] - dataCopy[++nextRow];
var b1 = - dataCopy[++priorRow] - dataCopy[++centerRow] - dataCopy[++nextRow];
var rp = dataCopy[priorRow += 2];
var gp = dataCopy[++priorRow];
var bp = dataCopy[++priorRow];
var rc = dataCopy[centerRow += 2];
var gc = dataCopy[++centerRow];
var bc = dataCopy[++centerRow];
var rn = dataCopy[nextRow += 2];
var gn = dataCopy[++nextRow];
var bn = dataCopy[++nextRow];
var r2 = - rp - rc - rn;
var g2 = - gp - gc - gn;
var b2 = - bp - bc - bn;
// Main convolution loop
for (var x = 1; x < wm1; ++x) {
centerRow = pixel + 4;
priorRow = centerRow - w4;
nextRow = centerRow + w4;
var r = 127 + r1 - rp - (rc * -8) - rn;
var g = 127 + g1 - gp - (gc * -8) - gn;
var b = 127 + b1 - bp - (bc * -8) - bn;
r1 = r2;
g1 = g2;
b1 = b2;
rp = dataCopy[ priorRow];
gp = dataCopy[++priorRow];
bp = dataCopy[++priorRow];
rc = dataCopy[ centerRow];
gc = dataCopy[++centerRow];
bc = dataCopy[++centerRow];
rn = dataCopy[ nextRow];
gn = dataCopy[++nextRow];
bn = dataCopy[++nextRow];
r += (r2 = - rp - rc - rn);
g += (g2 = - gp - gc - gn);
b += (b2 = - bp - bc - bn);
if (r > 255) r = 255;
if (g > 255) g = 255;
if (b > 255) b = 255;
if (r < 0) r = 0;
if (g < 0) g = 0;
if (b < 0) b = 0;
data[pixel] = r;
data[++pixel] = g;
data[++pixel] = b;
//data[++pixel] = 255; // alpha
pixel+=2;
}
pixel += 8;
}
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

134
actions/emboss.js
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/*
* Pixastic Lib - Emboss filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.emboss = {
process : function(params) {
var strength = parseFloat(params.options.strength)||1;
var greyLevel = typeof params.options.greyLevel != "undefined" ? parseInt(params.options.greyLevel) : 180;
var direction = params.options.direction||"topleft";
var blend = !!(params.options.blend && params.options.blend != "false");
var dirY = 0;
var dirX = 0;
switch (direction) {
case "topleft": // top left
dirY = -1;
dirX = -1;
break;
case "top": // top
dirY = -1;
dirX = 0;
break;
case "topright": // top right
dirY = -1;
dirX = 1;
break;
case "right": // right
dirY = 0;
dirX = 1;
break;
case "bottomright": // bottom right
dirY = 1;
dirX = 1;
break;
case "bottom": // bottom
dirY = 1;
dirX = 0;
break;
case "bottomleft": // bottom left
dirY = 1;
dirX = -1;
break;
case "left": // left
dirY = 0;
dirX = -1;
break;
}
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var dataCopy = Pixastic.prepareData(params, true)
var invertAlpha = !!params.options.invertAlpha;
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var otherY = dirY;
if (y + otherY < 1) otherY = 0;
if (y + otherY > h) otherY = 0;
var offsetYOther = (y-1+otherY)*w*4;
var x = w;
do {
var offset = offsetY + (x-1)*4;
var otherX = dirX;
if (x + otherX < 1) otherX = 0;
if (x + otherX > w) otherX = 0;
var offsetOther = offsetYOther + (x-1+otherX)*4;
var dR = dataCopy[offset] - dataCopy[offsetOther];
var dG = dataCopy[offset+1] - dataCopy[offsetOther+1];
var dB = dataCopy[offset+2] - dataCopy[offsetOther+2];
var dif = dR;
var absDif = dif > 0 ? dif : -dif;
var absG = dG > 0 ? dG : -dG;
var absB = dB > 0 ? dB : -dB;
if (absG > absDif) {
dif = dG;
}
if (absB > absDif) {
dif = dB;
}
dif *= strength;
if (blend) {
var r = data[offset] + dif;
var g = data[offset+1] + dif;
var b = data[offset+2] + dif;
data[offset] = (r > 255) ? 255 : (r < 0 ? 0 : r);
data[offset+1] = (g > 255) ? 255 : (g < 0 ? 0 : g);
data[offset+2] = (b > 255) ? 255 : (b < 0 ? 0 : b);
} else {
var grey = greyLevel - dif;
if (grey < 0) {
grey = 0;
} else if (grey > 255) {
grey = 255;
}
data[offset] = data[offset+1] = data[offset+2] = grey;
}
} while (--x);
} while (--y);
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " progid:DXImageTransform.Microsoft.emboss()";
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
}
}

34
actions/flip.js
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/*
* Pixastic Lib - Flip - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.flip = {
process : function(params) {
var rect = params.options.rect;
var copyCanvas = document.createElement("canvas");
copyCanvas.width = rect.width;
copyCanvas.height = rect.height;
copyCanvas.getContext("2d").drawImage(params.image, rect.left, rect.top, rect.width, rect.height, 0, 0, rect.width, rect.height);
var ctx = params.canvas.getContext("2d");
ctx.clearRect(rect.left, rect.top, rect.width, rect.height);
if (params.options.axis == "horizontal") {
ctx.scale(-1,1);
ctx.drawImage(copyCanvas, -rect.left-rect.width, rect.top, rect.width, rect.height)
} else {
ctx.scale(1,-1);
ctx.drawImage(copyCanvas, rect.left, -rect.top-rect.height, rect.width, rect.height)
}
params.useData = false;
return true;
},
checkSupport : function() {
return Pixastic.Client.hasCanvas();
}
}

33
actions/fliph.js
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/*
* Pixastic Lib - Horizontal flip - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.fliph = {
process : function(params) {
if (Pixastic.Client.hasCanvas()) {
var rect = params.options.rect;
var copyCanvas = document.createElement("canvas");
copyCanvas.width = rect.width;
copyCanvas.height = rect.height;
copyCanvas.getContext("2d").drawImage(params.image, rect.left, rect.top, rect.width, rect.height, 0, 0, rect.width, rect.height);
var ctx = params.canvas.getContext("2d");
ctx.clearRect(rect.left, rect.top, rect.width, rect.height);
ctx.scale(-1,1);
ctx.drawImage(copyCanvas, -rect.left-rect.width, rect.top, rect.width, rect.height)
params.useData = false;
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " fliph";
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvas() || Pixastic.Client.isIE());
}
}

33
actions/flipv.js
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/*
* Pixastic Lib - Vertical flip - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.flipv = {
process : function(params) {
if (Pixastic.Client.hasCanvas()) {
var rect = params.options.rect;
var copyCanvas = document.createElement("canvas");
copyCanvas.width = rect.width;
copyCanvas.height = rect.height;
copyCanvas.getContext("2d").drawImage(params.image, rect.left, rect.top, rect.width, rect.height, 0, 0, rect.width, rect.height);
var ctx = params.canvas.getContext("2d");
ctx.clearRect(rect.left, rect.top, rect.width, rect.height);
ctx.scale(1,-1);
ctx.drawImage(copyCanvas, rect.left, -rect.top-rect.height, rect.width, rect.height)
params.useData = false;
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " flipv";
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvas() || Pixastic.Client.isIE());
}
}

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actions/glow.js
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/*
* Pixastic Lib - Glow - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.glow = {
process : function(params) {
var amount = (parseFloat(params.options.amount)||0);
var blurAmount = parseFloat(params.options.radius)||0;
amount = Math.min(1,Math.max(0,amount));
blurAmount = Math.min(5,Math.max(0,blurAmount));
if (Pixastic.Client.hasCanvasImageData()) {
var rect = params.options.rect;
var blurCanvas = document.createElement("canvas");
blurCanvas.width = params.width;
blurCanvas.height = params.height;
var blurCtx = blurCanvas.getContext("2d");
blurCtx.drawImage(params.canvas,0,0);
var scale = 2;
var smallWidth = Math.round(params.width / scale);
var smallHeight = Math.round(params.height / scale);
var copy = document.createElement("canvas");
copy.width = smallWidth;
copy.height = smallHeight;
var clear = true;
var steps = Math.round(blurAmount * 20);
var copyCtx = copy.getContext("2d");
for (var i=0;i<steps;i++) {
var scaledWidth = Math.max(1,Math.round(smallWidth - i));
var scaledHeight = Math.max(1,Math.round(smallHeight - i));
copyCtx.clearRect(0,0,smallWidth,smallHeight);
copyCtx.drawImage(
blurCanvas,
0,0,params.width,params.height,
0,0,scaledWidth,scaledHeight
);
blurCtx.clearRect(0,0,params.width,params.height);
blurCtx.drawImage(
copy,
0,0,scaledWidth,scaledHeight,
0,0,params.width,params.height
);
}
var data = Pixastic.prepareData(params);
var blurData = Pixastic.prepareData({canvas:blurCanvas,options:params.options});
var p = rect.width * rect.height;
var pix = p*4, pix1 = pix + 1, pix2 = pix + 2, pix3 = pix + 3;
while (p--) {
if ((data[pix-=4] += amount * blurData[pix]) > 255) data[pix] = 255;
if ((data[pix1-=4] += amount * blurData[pix1]) > 255) data[pix1] = 255;
if ((data[pix2-=4] += amount * blurData[pix2]) > 255) data[pix2] = 255;
}
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

74
actions/histogram.js
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/*
* Pixastic Lib - Histogram - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.histogram = {
process : function(params) {
var average = !!(params.options.average && params.options.average != "false");
var paint = !!(params.options.paint && params.options.paint != "false");
var color = params.options.color || "rgba(255,255,255,0.5)";
var values = [];
if (typeof params.options.returnValue != "object") {
params.options.returnValue = {values:[]};
}
var returnValue = params.options.returnValue;
if (typeof returnValue.values != "array") {
returnValue.values = [];
}
values = returnValue.values;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
params.useData = false;
for (var i=0;i<256;i++) {
values[i] = 0;
}
var rect = params.options.rect;
var p = rect.width * rect.height;
var pix = p*4, pix1 = pix + 1, pix2 = pix + 2, pix3 = pix + 3;
var round = Math.round;
if (average) {
while (p--) {
values[ round((data[pix-=4]+data[pix+1]+data[pix+2])/3) ]++;
}
} else {
while (p--) {
values[ round(data[pix-=4]*0.3 + data[pix+1]*0.59 + data[pix+2]*0.11) ]++;
}
}
if (paint) {
var maxValue = 0;
for (var i=0;i<256;i++) {
if (values[i] > maxValue) {
maxValue = values[i];
}
}
var heightScale = params.height / maxValue;
var widthScale = params.width / 256;
var ctx = params.canvas.getContext("2d");
ctx.fillStyle = color;
for (var i=0;i<256;i++) {
ctx.fillRect(
i * widthScale, params.height - heightScale * values[i],
widthScale, values[i] * heightScale
);
}
}
returnValue.values = values;
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

145
actions/hsl.js
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/*
* Pixastic Lib - HSL Adjust - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.hsl = {
process : function(params) {
var hue = parseInt(params.options.hue,10)||0;
var saturation = (parseInt(params.options.saturation,10)||0) / 100;
var lightness = (parseInt(params.options.lightness,10)||0) / 100;
// this seems to give the same result as Photoshop
if (saturation < 0) {
var satMul = 1+saturation;
} else {
var satMul = 1+saturation*2;
}
hue = (hue%360) / 360;
var hue6 = hue * 6;
var rgbDiv = 1 / 255;
var light255 = lightness * 255;
var lightp1 = 1 + lightness;
var lightm1 = 1 - lightness;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var p = rect.width * rect.height;
var pix = p*4, pix1 = pix + 1, pix2 = pix + 2, pix3 = pix + 3;
while (p--) {
var r = data[pix-=4];
var g = data[pix1=pix+1];
var b = data[pix2=pix+2];
if (hue != 0 || saturation != 0) {
// ok, here comes rgb to hsl + adjust + hsl to rgb, all in one jumbled mess.
// It's not so pretty, but it's been optimized to get somewhat decent performance.
// The transforms were originally adapted from the ones found in Graphics Gems, but have been heavily modified.
var vs = r;
if (g > vs) vs = g;
if (b > vs) vs = b;
var ms = r;
if (g < ms) ms = g;
if (b < ms) ms = b;
var vm = (vs-ms);
var l = (ms+vs)/510;
if (l > 0) {
if (vm > 0) {
if (l <= 0.5) {
var s = vm / (vs+ms) * satMul;
if (s > 1) s = 1;
var v = (l * (1+s));
} else {
var s = vm / (510-vs-ms) * satMul;
if (s > 1) s = 1;
var v = (l+s - l*s);
}
if (r == vs) {
if (g == ms)
var h = 5 + ((vs-b)/vm) + hue6;
else
var h = 1 - ((vs-g)/vm) + hue6;
} else if (g == vs) {
if (b == ms)
var h = 1 + ((vs-r)/vm) + hue6;
else
var h = 3 - ((vs-b)/vm) + hue6;
} else {
if (r == ms)
var h = 3 + ((vs-g)/vm) + hue6;
else
var h = 5 - ((vs-r)/vm) + hue6;
}
if (h < 0) h+=6;
if (h >= 6) h-=6;
var m = (l+l-v);
var sextant = h>>0;
if (sextant == 0) {
r = v*255; g = (m+((v-m)*(h-sextant)))*255; b = m*255;
} else if (sextant == 1) {
r = (v-((v-m)*(h-sextant)))*255; g = v*255; b = m*255;
} else if (sextant == 2) {
r = m*255; g = v*255; b = (m+((v-m)*(h-sextant)))*255;
} else if (sextant == 3) {
r = m*255; g = (v-((v-m)*(h-sextant)))*255; b = v*255;
} else if (sextant == 4) {
r = (m+((v-m)*(h-sextant)))*255; g = m*255; b = v*255;
} else if (sextant == 5) {
r = v*255; g = m*255; b = (v-((v-m)*(h-sextant)))*255;
}
}
}
}
if (lightness < 0) {
r *= lightp1;
g *= lightp1;
b *= lightp1;
} else if (lightness > 0) {
r = r * lightm1 + light255;
g = g * lightm1 + light255;
b = b * lightm1 + light255;
}
if (r < 0)
data[pix] = 0
else if (r > 255)
data[pix] = 255
else
data[pix] = r;
if (g < 0)
data[pix1] = 0
else if (g > 255)
data[pix1] = 255
else
data[pix1] = g;
if (b < 0)
data[pix2] = 0
else if (b > 255)
data[pix2] = 255
else
data[pix2] = b;
}
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

36
actions/invert.js
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/*
* Pixastic Lib - Invert filter - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.invert = {
process : function(params) {
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var invertAlpha = !!params.options.invertAlpha;
var rect = params.options.rect;
var p = rect.width * rect.height;
var pix = p*4, pix1 = pix + 1, pix2 = pix + 2, pix3 = pix + 3;
while (p--) {
data[pix-=4] = 255 - data[pix];
data[pix1-=4] = 255 - data[pix1];
data[pix2-=4] = 255 - data[pix2];
if (invertAlpha)
data[pix3-=4] = 255 - data[pix3];
}
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " invert";
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
}
}

112
actions/laplace.js
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/*
* Pixastic Lib - Laplace filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.laplace = {
process : function(params) {
var strength = 1.0;
var invert = !!(params.options.invert && params.options.invert != "false");
var contrast = parseFloat(params.options.edgeStrength)||0;
var greyLevel = parseInt(params.options.greyLevel)||0;
contrast = -contrast;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var dataCopy = Pixastic.prepareData(params, true)
var kernel = [
[-1, -1, -1],
[-1, 8, -1],
[-1, -1, -1]
];
var weight = 1/8;
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var nextY = (y == h) ? y - 1 : y;
var prevY = (y == 1) ? 0 : y-2;
var offsetYPrev = prevY*w*4;
var offsetYNext = nextY*w*4;
var x = w;
do {
var offset = offsetY + (x*4-4);
var offsetPrev = offsetYPrev + ((x == 1) ? 0 : x-2) * 4;
var offsetNext = offsetYNext + ((x == w) ? x-1 : x) * 4;
var r = ((-dataCopy[offsetPrev-4]
- dataCopy[offsetPrev]
- dataCopy[offsetPrev+4]
- dataCopy[offset-4]
- dataCopy[offset+4]
- dataCopy[offsetNext-4]
- dataCopy[offsetNext]
- dataCopy[offsetNext+4])
+ dataCopy[offset] * 8)
* weight;
var g = ((-dataCopy[offsetPrev-3]
- dataCopy[offsetPrev+1]
- dataCopy[offsetPrev+5]
- dataCopy[offset-3]
- dataCopy[offset+5]
- dataCopy[offsetNext-3]
- dataCopy[offsetNext+1]
- dataCopy[offsetNext+5])
+ dataCopy[offset+1] * 8)
* weight;
var b = ((-dataCopy[offsetPrev-2]
- dataCopy[offsetPrev+2]
- dataCopy[offsetPrev+6]
- dataCopy[offset-2]
- dataCopy[offset+6]
- dataCopy[offsetNext-2]
- dataCopy[offsetNext+2]
- dataCopy[offsetNext+6])
+ dataCopy[offset+2] * 8)
* weight;
var brightness = ((r + g + b)/3) + greyLevel;
if (contrast != 0) {
if (brightness > 127) {
brightness += ((brightness + 1) - 128) * contrast;
} else if (brightness < 127) {
brightness -= (brightness + 1) * contrast;
}
}
if (invert) {
brightness = 255 - brightness;
}
if (brightness < 0 ) brightness = 0;
if (brightness > 255 ) brightness = 255;
data[offset] = data[offset+1] = data[offset+2] = brightness;
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

61
actions/lighten.js
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/*
* Pixastic Lib - Lighten filter - v0.1.1
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.lighten = {
process : function(params) {
var amount = parseFloat(params.options.amount) || 0;
amount = Math.max(-1, Math.min(1, amount));
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var p = rect.width * rect.height;
var pix = p*4, pix1 = pix + 1, pix2 = pix + 2;
var mul = amount + 1;
while (p--) {
if ((data[pix-=4] = data[pix] * mul) > 255)
data[pix] = 255;
if ((data[pix1-=4] = data[pix1] * mul) > 255)
data[pix1] = 255;
if ((data[pix2-=4] = data[pix2] * mul) > 255)
data[pix2] = 255;
}
return true;
} else if (Pixastic.Client.isIE()) {
var img = params.image;
if (amount < 0) {
img.style.filter += " light()";
img.filters[img.filters.length-1].addAmbient(
255,255,255,
100 * -amount
);
} else if (amount > 0) {
img.style.filter += " light()";
img.filters[img.filters.length-1].addAmbient(
255,255,255,
100
);
img.filters[img.filters.length-1].addAmbient(
255,255,255,
100 * amount
);
}
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
}
}

55
actions/mosaic.js
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/*
* Pixastic Lib - Mosaic filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.mosaic = {
process : function(params) {
var blockSize = Math.max(1,parseInt(params.options.blockSize,10));
if (Pixastic.Client.hasCanvasImageData()) {
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
var ctx = params.canvas.getContext("2d");
var pixel = document.createElement("canvas");
pixel.width = pixel.height = 1;
var pixelCtx = pixel.getContext("2d");
var copy = document.createElement("canvas");
copy.width = w;
copy.height = h;
var copyCtx = copy.getContext("2d");
copyCtx.drawImage(params.canvas,rect.left,rect.top,w,h, 0,0,w,h);
for (var y=0;y<h;y+=blockSize) {
for (var x=0;x<w;x+=blockSize) {
var blockSizeX = blockSize;
var blockSizeY = blockSize;
if (blockSizeX + x > w)
blockSizeX = w - x;
if (blockSizeY + y > h)
blockSizeY = h - y;
pixelCtx.drawImage(copy, x, y, blockSizeX, blockSizeY, 0, 0, 1, 1);
var data = pixelCtx.getImageData(0,0,1,1).data;
ctx.fillStyle = "rgb(" + data[0] + "," + data[1] + "," + data[2] + ")";
ctx.fillRect(rect.left + x, rect.top + y, blockSize, blockSize);
}
}
params.useData = false;
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData());
}
}

73
actions/noise.js
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/*
* Pixastic Lib - Noise filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.noise = {
process : function(params) {
var amount = 0;
var strength = 0;
var mono = false;
if (typeof params.options.amount != "undefined")
amount = parseFloat(params.options.amount)||0;
if (typeof params.options.strength != "undefined")
strength = parseFloat(params.options.strength)||0;
if (typeof params.options.mono != "undefined")
mono = !!(params.options.mono && params.options.mono != "false");
amount = Math.max(0,Math.min(1,amount));
strength = Math.max(0,Math.min(1,strength));
var noise = 128 * strength;
var noise2 = noise / 2;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
var random = Math.random;
do {
var offsetY = (y-1)*w4;
var x = w;
do {
var offset = offsetY + (x-1)*4;
if (random() < amount) {
if (mono) {
var pixelNoise = - noise2 + random() * noise;
var r = data[offset] + pixelNoise;
var g = data[offset+1] + pixelNoise;
var b = data[offset+2] + pixelNoise;
} else {
var r = data[offset] - noise2 + (random() * noise);
var g = data[offset+1] - noise2 + (random() * noise);
var b = data[offset+2] - noise2 + (random() * noise);
}
if (r < 0 ) r = 0;
if (g < 0 ) g = 0;
if (b < 0 ) b = 0;
if (r > 255 ) r = 255;
if (g > 255 ) g = 255;
if (b > 255 ) b = 255;
data[offset] = r;
data[offset+1] = g;
data[offset+2] = b;
}
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

91
actions/pointillize.js
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/*
* Pixastic Lib - Pointillize filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.pointillize = {
process : function(params) {
var radius = Math.max(1,parseInt(params.options.radius,10));
var density = Math.min(5,Math.max(0,parseFloat(params.options.density)||0));
var noise = Math.max(0,parseFloat(params.options.noise)||0);
var transparent = !!(params.options.transparent && params.options.transparent != "false");
if (Pixastic.Client.hasCanvasImageData()) {
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
var ctx = params.canvas.getContext("2d");
var canvasWidth = params.canvas.width;
var canvasHeight = params.canvas.height;
var pixel = document.createElement("canvas");
pixel.width = pixel.height = 1;
var pixelCtx = pixel.getContext("2d");
var copy = document.createElement("canvas");
copy.width = w;
copy.height = h;
var copyCtx = copy.getContext("2d");
copyCtx.drawImage(params.canvas,rect.left,rect.top,w,h, 0,0,w,h);
var diameter = radius * 2;
if (transparent)
ctx.clearRect(rect.left, rect.top, rect.width, rect.height);
var noiseRadius = radius * noise;
var dist = 1 / density;
for (var y=0;y<h+radius;y+=diameter*dist) {
for (var x=0;x<w+radius;x+=diameter*dist) {
rndX = noise ? (x+((Math.random()*2-1) * noiseRadius))>>0 : x;
rndY = noise ? (y+((Math.random()*2-1) * noiseRadius))>>0 : y;
var pixX = rndX - radius;
var pixY = rndY - radius;
if (pixX < 0) pixX = 0;
if (pixY < 0) pixY = 0;
var cx = rndX + rect.left;
var cy = rndY + rect.top;
if (cx < 0) cx = 0;
if (cx > canvasWidth) cx = canvasWidth;
if (cy < 0) cy = 0;
if (cy > canvasHeight) cy = canvasHeight;
var diameterX = diameter;
var diameterY = diameter;
if (diameterX + pixX > w)
diameterX = w - pixX;
if (diameterY + pixY > h)
diameterY = h - pixY;
if (diameterX < 1) diameterX = 1;
if (diameterY < 1) diameterY = 1;
pixelCtx.drawImage(copy, pixX, pixY, diameterX, diameterY, 0, 0, 1, 1);
var data = pixelCtx.getImageData(0,0,1,1).data;
ctx.fillStyle = "rgb(" + data[0] + "," + data[1] + "," + data[2] + ")";
ctx.beginPath();
ctx.arc(cx, cy, radius, 0, Math.PI*2, true);
ctx.closePath();
ctx.fill();
}
}
params.useData = false;
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData());
}
}

57
actions/posterize.js
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/*
* Pixastic Lib - Posterize effect - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.posterize = {
process : function(params) {
var numLevels = 256;
if (typeof params.options.levels != "undefined")
numLevels = parseInt(params.options.levels,10)||1;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
numLevels = Math.max(2,Math.min(256,numLevels));
var numAreas = 256 / numLevels;
var numValues = 256 / (numLevels-1);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var x = w;
do {
var offset = offsetY + (x-1)*4;
var r = numValues * ((data[offset] / numAreas)>>0);
var g = numValues * ((data[offset+1] / numAreas)>>0);
var b = numValues * ((data[offset+2] / numAreas)>>0);
if (r > 255) r = 255;
if (g > 255) g = 255;
if (b > 255) b = 255;
data[offset] = r;
data[offset+1] = g;
data[offset+2] = b;
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

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actions/removenoise.js
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/*
* Pixastic Lib - Remove noise - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.removenoise = {
process : function(params) {
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var nextY = (y == h) ? y - 1 : y;
var prevY = (y == 1) ? 0 : y-2;
var offsetYPrev = prevY*w*4;
var offsetYNext = nextY*w*4;
var x = w;
do {
var offset = offsetY + (x*4-4);
var offsetPrev = offsetYPrev + ((x == 1) ? 0 : x-2) * 4;
var offsetNext = offsetYNext + ((x == w) ? x-1 : x) * 4;
var minR, maxR, minG, maxG, minB, maxB;
minR = maxR = data[offsetPrev];
var r1 = data[offset-4], r2 = data[offset+4], r3 = data[offsetNext];
if (r1 < minR) minR = r1;
if (r2 < minR) minR = r2;
if (r3 < minR) minR = r3;
if (r1 > maxR) maxR = r1;
if (r2 > maxR) maxR = r2;
if (r3 > maxR) maxR = r3;
minG = maxG = data[offsetPrev+1];
var g1 = data[offset-3], g2 = data[offset+5], g3 = data[offsetNext+1];
if (g1 < minG) minG = g1;
if (g2 < minG) minG = g2;
if (g3 < minG) minG = g3;
if (g1 > maxG) maxG = g1;
if (g2 > maxG) maxG = g2;
if (g3 > maxG) maxG = g3;
minB = maxB = data[offsetPrev+2];
var b1 = data[offset-2], b2 = data[offset+6], b3 = data[offsetNext+2];
if (b1 < minB) minB = b1;
if (b2 < minB) minB = b2;
if (b3 < minB) minB = b3;
if (b1 > maxB) maxB = b1;
if (b2 > maxB) maxB = b2;
if (b3 > maxB) maxB = b3;
if (data[offset] > maxR) {
data[offset] = maxR;
} else if (data[offset] < minR) {
data[offset] = minR;
}
if (data[offset+1] > maxG) {
data[offset+1] = maxG;
} else if (data[offset+1] < minG) {
data[offset+1] = minG;
}
if (data[offset+2] > maxB) {
data[offset+2] = maxB;
} else if (data[offset+2] < minB) {
data[offset+2] = minB;
}
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

36
actions/resize.js
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/*
* Pixastic Lib - Resize - v0.1.0
* Copyright (c) 2009 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.resize = {
process : function(params) {
if (Pixastic.Client.hasCanvas()) {
var width = parseInt(params.options.width,10);
var height = parseInt(params.options.height,10);
var canvas = params.canvas;
if (width < 1) width = 1;
if (width < 2) width = 2;
var copy = document.createElement("canvas");
copy.width = width;
copy.height = height;
copy.getContext("2d").drawImage(canvas,0,0,width,height);
canvas.width = width;
canvas.height = height;
canvas.getContext("2d").drawImage(copy,0,0);
params.useData = false;
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvas();
}
}

53
actions/rotate.js
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/*
* Pixastic Lib - Rotate - v0.1.0
* Copyright (c) 2009 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.rotate = {
process : function(params) {
if (Pixastic.Client.hasCanvas()) {
var canvas = params.canvas;
var width = params.width;
var height = params.height;
var copy = document.createElement("canvas");
copy.width = width;
copy.height = height;
copy.getContext("2d").drawImage(canvas,0,0,width,height);
var angle = -parseFloat(params.options.angle) * Math.PI / 180;
var dimAngle = angle;
if (dimAngle > Math.PI*0.5)
dimAngle = Math.PI - dimAngle;
if (dimAngle < -Math.PI*0.5)
dimAngle = -Math.PI - dimAngle;
var diag = Math.sqrt(width*width + height*height);
var diagAngle1 = Math.abs(dimAngle) - Math.abs(Math.atan2(height, width));
var diagAngle2 = Math.abs(dimAngle) + Math.abs(Math.atan2(height, width));
var newWidth = Math.abs(Math.cos(diagAngle1) * diag);
var newHeight = Math.abs(Math.sin(diagAngle2) * diag);
canvas.width = newWidth;
canvas.height = newHeight;
var ctx = canvas.getContext("2d");
ctx.translate(newWidth/2, newHeight/2);
ctx.rotate(angle);
ctx.drawImage(copy,-width/2,-height/2);
params.useData = false;
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvas();
}
}

60
actions/sepia.js
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/*
* Pixastic Lib - Sepia filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.sepia = {
process : function(params) {
var mode = (parseInt(params.options.mode,10)||0);
if (mode < 0) mode = 0;
if (mode > 1) mode = 1;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var x = w;
do {
var offset = offsetY + (x-1)*4;
if (mode) {
// a bit faster, but not as good
var d = data[offset] * 0.299 + data[offset+1] * 0.587 + data[offset+2] * 0.114;
var r = (d + 39);
var g = (d + 14);
var b = (d - 36);
} else {
// Microsoft
var or = data[offset];
var og = data[offset+1];
var ob = data[offset+2];
var r = (or * 0.393 + og * 0.769 + ob * 0.189);
var g = (or * 0.349 + og * 0.686 + ob * 0.168);
var b = (or * 0.272 + og * 0.534 + ob * 0.131);
}
if (r < 0) r = 0; if (r > 255) r = 255;
if (g < 0) g = 0; if (g > 255) g = 255;
if (b < 0) b = 0; if (b > 255) b = 255;
data[offset] = r;
data[offset+1] = g;
data[offset+2] = b;
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

110
actions/sharpen.js
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/*
* Pixastic Lib - Sharpen filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.sharpen = {
process : function(params) {
var strength = 0;
if (typeof params.options.amount != "undefined")
strength = parseFloat(params.options.amount)||0;
if (strength < 0) strength = 0;
if (strength > 1) strength = 1;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var dataCopy = Pixastic.prepareData(params, true)
var mul = 15;
var mulOther = 1 + 3*strength;
var kernel = [
[0, -mulOther, 0],
[-mulOther, mul, -mulOther],
[0, -mulOther, 0]
];
var weight = 0;
for (var i=0;i<3;i++) {
for (var j=0;j<3;j++) {
weight += kernel[i][j];
}
}
weight = 1 / weight;
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
mul *= weight;
mulOther *= weight;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var nextY = (y == h) ? y - 1 : y;
var prevY = (y == 1) ? 0 : y-2;
var offsetYPrev = prevY*w4;
var offsetYNext = nextY*w4;
var x = w;
do {
var offset = offsetY + (x*4-4);
var offsetPrev = offsetYPrev + ((x == 1) ? 0 : x-2) * 4;
var offsetNext = offsetYNext + ((x == w) ? x-1 : x) * 4;
var r = ((
- dataCopy[offsetPrev]
- dataCopy[offset-4]
- dataCopy[offset+4]
- dataCopy[offsetNext]) * mulOther
+ dataCopy[offset] * mul
);
var g = ((
- dataCopy[offsetPrev+1]
- dataCopy[offset-3]
- dataCopy[offset+5]
- dataCopy[offsetNext+1]) * mulOther
+ dataCopy[offset+1] * mul
);
var b = ((
- dataCopy[offsetPrev+2]
- dataCopy[offset-2]
- dataCopy[offset+6]
- dataCopy[offsetNext+2]) * mulOther
+ dataCopy[offset+2] * mul
);
if (r < 0 ) r = 0;
if (g < 0 ) g = 0;
if (b < 0 ) b = 0;
if (r > 255 ) r = 255;
if (g > 255 ) g = 255;
if (b > 255 ) b = 255;
data[offset] = r;
data[offset+1] = g;
data[offset+2] = b;
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

45
actions/solarize.js
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/*
* Pixastic Lib - Solarize filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.solarize = {
process : function(params) {
var useAverage = !!(params.options.average && params.options.average != "false");
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var x = w;
do {
var offset = offsetY + (x-1)*4;
var r = data[offset];
var g = data[offset+1];
var b = data[offset+2];
if (r > 127) r = 255 - r;
if (g > 127) g = 255 - g;
if (b > 127) b = 255 - b;
data[offset] = r;
data[offset+1] = g;
data[offset+2] = b;
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData());
}
}

111
actions/unsharpmask.js
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/*
* Pixastic Lib - USM - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
Pixastic.Actions.unsharpmask = {
process : function(params) {
var amount = (parseFloat(params.options.amount)||0);
var blurAmount = parseFloat(params.options.radius)||0;
var threshold = parseFloat(params.options.threshold)||0;
amount = Math.min(500,Math.max(0,amount)) / 2;
blurAmount = Math.min(5,Math.max(0,blurAmount)) / 10;
threshold = Math.min(255,Math.max(0,threshold));
threshold--;
var thresholdNeg = -threshold;
amount *= 0.016;
amount++;
if (Pixastic.Client.hasCanvasImageData()) {
var rect = params.options.rect;
var blurCanvas = document.createElement("canvas");
blurCanvas.width = params.width;
blurCanvas.height = params.height;
var blurCtx = blurCanvas.getContext("2d");
blurCtx.drawImage(params.canvas,0,0);
var scale = 2;
var smallWidth = Math.round(params.width / scale);
var smallHeight = Math.round(params.height / scale);
var copy = document.createElement("canvas");
copy.width = smallWidth;
copy.height = smallHeight;
var steps = Math.round(blurAmount * 20);
var copyCtx = copy.getContext("2d");
for (var i=0;i<steps;i++) {
var scaledWidth = Math.max(1,Math.round(smallWidth - i));
var scaledHeight = Math.max(1,Math.round(smallHeight - i));
copyCtx.clearRect(0,0,smallWidth,smallHeight);
copyCtx.drawImage(
blurCanvas,
0,0,params.width,params.height,
0,0,scaledWidth,scaledHeight
);
blurCtx.clearRect(0,0,params.width,params.height);
blurCtx.drawImage(
copy,
0,0,scaledWidth,scaledHeight,
0,0,params.width,params.height
);
}
var data = Pixastic.prepareData(params);
var blurData = Pixastic.prepareData({canvas:blurCanvas,options:params.options});
var w = rect.width;
var h = rect.height;
var w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var x = w;
do {
var offset = offsetY + (x*4-4);
var difR = data[offset] - blurData[offset];
if (difR > threshold || difR < thresholdNeg) {
var blurR = blurData[offset];
blurR = amount * difR + blurR;
data[offset] = blurR > 255 ? 255 : (blurR < 0 ? 0 : blurR);
}
var difG = data[offset+1] - blurData[offset+1];
if (difG > threshold || difG < thresholdNeg) {
var blurG = blurData[offset+1];
blurG = amount * difG + blurG;
data[offset+1] = blurG > 255 ? 255 : (blurG < 0 ? 0 : blurG);
}
var difB = data[offset+2] - blurData[offset+2];
if (difB > threshold || difB < thresholdNeg) {
var blurB = blurData[offset+2];
blurB = amount * difB + blurB;
data[offset+2] = blurB > 255 ? 255 : (blurB < 0 ? 0 : blurB);
}
} while (--x);
} while (--y);
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

185
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<!doctype html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<title>Pixastic</title>
<link rel="stylesheet" href="styles.css" />
<script src="pixastic.js"></script>
<script src="pixastic.effects.js"></script>
<script src="pixastic.worker.js"></script>
<script>
window.onload = function() {
function doTest(test) {
var img = document.getElementById("original-image"),
canvas = document.getElementById("output-canvas"),
ctx = canvas.getContext("2d"),
progress = document.getElementById("progress-inner"),
P;
canvas.style.display = "none";
canvas.width = img.width;
canvas.height = img.height;
canvas.title = test.effect;
ctx.drawImage(img, 0, 0);
P = new Pixastic(ctx);
P[test.effect](test.options).done(function() {
canvas.style.display = "block";
}, function(p) {
progress.style.height = (p * 100) + "%";
});
}
var tests = [
{
effect : "posterize",
options : {
levels : 5
}
}, {
effect : "solarize"
}, {
effect : "colorfilter",
options : {
r : 0,
g : 194 / 255,
b : 177 / 255,
luminosity : 0
}
}, {
effect : "findedges"
}, {
effect : "emboss",
options : {
amount : 0.5,
angle : 135 / 180 * Math.PI
}
}, {
effect : "edgeenhance3x3"
}, {
effect : "edgeenhance5x5"
}, {
effect : "sharpen3x3",
options : {
strength : 0.5
}
}, {
effect : "sharpen5x5",
options : {
strength : 0.1
}
}, {
effect : "soften3x3"
}, {
effect : "soften5x5"
}, {
effect : "laplace3x3"
}, {
effect : "laplace5x5"
}, {
effect : "crossedges",
options : {
strength : 0.5
}
}, {
effect : "coloradjust",
options : {
r : 0,
g : 0.3,
b : 0
}
}, {
effect : "blur",
options : {
kernelSize : 5
}
},{
effect : "glow",
options : {
kernelSize : 5,
amount : 1.0
}
}, {
effect : "hsl",
options : {
hue : -0.8,
saturation : 0.5,
lightness : -0.3
}
},{
effect : "fliph"
},{
effect : "flipv"
},{
effect : "desaturate"
},{
effect : "brightness",
options : {
brightness : -1.00,
contrast : -0.1
}
},{
effect : "sepia",
},{
effect : "invert",
},{
effect : "noise",
options : {
amount : 0.5,
strength : 0.5,
mono : true
}
},{
effect : "removenoise"
},{
effect : "lighten",
options : {
amount : 0.5
}
},
{
effect : 'mosaic',
options : {
blockSize : 8
}
},
{
effect : 'equalize',
options : {
}
}
];
var ul = document.getElementById("testlist"),
li;
for (var i=0;i<tests.length;i++) {
li = document.createElement("li");
li.innerHTML = tests[i].effect;
li.setAttribute("data-test", i);
ul.appendChild(li);
}
ul.addEventListener("click", function(e) {
var target = e.target || e.srcElement,
test;
if (target.tagName == "LI") {
test = tests[target.getAttribute("data-test")];
doTest(test);
}
}, false);
}
</script>
</head>
<body>
<ul id="testlist"></ul>
<img src="sample-images/monalisa.jpg" id="original-image">
<div id="progress"><div id="progress-inner"></div></div>
<canvas id="output-canvas"></canvas>
</body>
</html>

674
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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
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Some devices are designed to deny users access to install or run
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pattern of such abuse occurs in the area of products for individuals to
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stand ready to extend this provision to those domains in future versions
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Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
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avoid the special danger that patents applied to a free program could
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patents cannot be used to render the program non-free.
The precise terms and conditions for copying, distribution and
modification follow.
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How to Apply These Terms to Your New Programs
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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Also add information on how to contact you by electronic and paper mail.
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

0
license.txt → license-mpl.txt Executable file → Normal file
View file

435
pixastic.core.js
View file

@ -1,435 +0,0 @@
/*
* Pixastic Lib - Core Functions - v0.1.3
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
var Pixastic = (function() {
function addEvent(el, event, handler) {
if (el.addEventListener)
el.addEventListener(event, handler, false);
else if (el.attachEvent)
el.attachEvent("on" + event, handler);
}
function onready(handler) {
var handlerDone = false;
var execHandler = function() {
if (!handlerDone) {
handlerDone = true;
handler();
}
}
document.write("<"+"script defer src=\"//:\" id=\"__onload_ie_pixastic__\"></"+"script>");
var script = document.getElementById("__onload_ie_pixastic__");
script.onreadystatechange = function() {
if (script.readyState == "complete") {
script.parentNode.removeChild(script);
execHandler();
}
}
if (document.addEventListener)
document.addEventListener("DOMContentLoaded", execHandler, false);
addEvent(window, "load", execHandler);
}
function init() {
var imgEls = getElementsByClass("pixastic", null, "img");
var canvasEls = getElementsByClass("pixastic", null, "canvas");
var elements = imgEls.concat(canvasEls);
for (var i=0;i<elements.length;i++) {
(function() {
var el = elements[i];
var actions = [];
var classes = el.className.split(" ");
for (var c=0;c<classes.length;c++) {
var cls = classes[c];
if (cls.substring(0,9) == "pixastic-") {
var actionName = cls.substring(9);
if (actionName != "")
actions.push(actionName);
}
}
if (actions.length) {
if (el.tagName.toLowerCase() == "img") {
var dataImg = new Image();
dataImg.src = el.src;
if (dataImg.complete) {
for (var a=0;a<actions.length;a++) {
var res = Pixastic.applyAction(el, el, actions[a], null);
if (res)
el = res;
}
} else {
dataImg.onload = function() {
for (var a=0;a<actions.length;a++) {
var res = Pixastic.applyAction(el, el, actions[a], null)
if (res)
el = res;
}
}
}
} else {
setTimeout(function() {
for (var a=0;a<actions.length;a++) {
var res = Pixastic.applyAction(
el, el, actions[a], null
);
if (res)
el = res;
}
},1);
}
}
})();
}
}
if (typeof pixastic_parseonload != "undefined" && pixastic_parseonload)
onready(init);
// getElementsByClass by Dustin Diaz, http://www.dustindiaz.com/getelementsbyclass/
function getElementsByClass(searchClass,node,tag) {
var classElements = new Array();
if ( node == null )
node = document;
if ( tag == null )
tag = '*';
var els = node.getElementsByTagName(tag);
var elsLen = els.length;
var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
for (i = 0, j = 0; i < elsLen; i++) {
if ( pattern.test(els[i].className) ) {
classElements[j] = els[i];
j++;
}
}
return classElements;
}
var debugElement;
function writeDebug(text, level) {
if (!Pixastic.debug) return;
try {
switch (level) {
case "warn" :
console.warn("Pixastic:", text);
break;
case "error" :
console.error("Pixastic:", text);
break;
default:
console.log("Pixastic:", text);
}
} catch(e) {
}
if (!debugElement) {
}
}
// canvas capability checks
var hasCanvas = (function() {
var c = document.createElement("canvas");
var val = false;
try {
val = !!((typeof c.getContext == "function") && c.getContext("2d"));
} catch(e) {}
return function() {
return val;
}
})();
var hasCanvasImageData = (function() {
var c = document.createElement("canvas");
var val = false;
var ctx;
try {
if (typeof c.getContext == "function" && (ctx = c.getContext("2d"))) {
val = (typeof ctx.getImageData == "function");
}
} catch(e) {}
return function() {
return val;
}
})();
var hasGlobalAlpha = (function() {
var hasAlpha = false;
var red = document.createElement("canvas");
if (hasCanvas() && hasCanvasImageData()) {
red.width = red.height = 1;
var redctx = red.getContext("2d");
redctx.fillStyle = "rgb(255,0,0)";
redctx.fillRect(0,0,1,1);
var blue = document.createElement("canvas");
blue.width = blue.height = 1;
var bluectx = blue.getContext("2d");
bluectx.fillStyle = "rgb(0,0,255)";
bluectx.fillRect(0,0,1,1);
redctx.globalAlpha = 0.5;
redctx.drawImage(blue, 0, 0);
var reddata = redctx.getImageData(0,0,1,1).data;
hasAlpha = (reddata[2] != 255);
}
return function() {
return hasAlpha;
}
})();
// return public interface
return {
parseOnLoad : false,
debug : false,
applyAction : function(img, dataImg, actionName, options) {
options = options || {};
var imageIsCanvas = (img.tagName.toLowerCase() == "canvas");
if (imageIsCanvas && Pixastic.Client.isIE()) {
if (Pixastic.debug) writeDebug("Tried to process a canvas element but browser is IE.");
return false;
}
var canvas, ctx;
var hasOutputCanvas = false;
if (Pixastic.Client.hasCanvas()) {
hasOutputCanvas = !!options.resultCanvas;
canvas = options.resultCanvas || document.createElement("canvas");
ctx = canvas.getContext("2d");
}
var w = img.offsetWidth;
var h = img.offsetHeight;
if (imageIsCanvas) {
w = img.width;
h = img.height;
}
// offsetWidth/Height might be 0 if the image is not in the document
if (w == 0 || h == 0) {
if (img.parentNode == null) {
// add the image to the doc (way out left), read its dimensions and remove it again
var oldpos = img.style.position;
var oldleft = img.style.left;
img.style.position = "absolute";
img.style.left = "-9999px";
document.body.appendChild(img);
w = img.offsetWidth;
h = img.offsetHeight;
document.body.removeChild(img);
img.style.position = oldpos;
img.style.left = oldleft;
} else {
if (Pixastic.debug) writeDebug("Image has 0 width and/or height.");
return;
}
}
if (actionName.indexOf("(") > -1) {
var tmp = actionName;
actionName = tmp.substr(0, tmp.indexOf("("));
var arg = tmp.match(/\((.*?)\)/);
if (arg[1]) {
arg = arg[1].split(";");
for (var a=0;a<arg.length;a++) {
thisArg = arg[a].split("=");
if (thisArg.length == 2) {
if (thisArg[0] == "rect") {
var rectVal = thisArg[1].split(",");
options[thisArg[0]] = {
left : parseInt(rectVal[0],10)||0,
top : parseInt(rectVal[1],10)||0,
width : parseInt(rectVal[2],10)||0,
height : parseInt(rectVal[3],10)||0
}
} else {
options[thisArg[0]] = thisArg[1];
}
}
}
}
}
if (!options.rect) {
options.rect = {
left : 0, top : 0, width : w, height : h
};
} else {
options.rect.left = Math.round(options.rect.left);
options.rect.top = Math.round(options.rect.top);
options.rect.width = Math.round(options.rect.width);
options.rect.height = Math.round(options.rect.height);
}
var validAction = false;
if (Pixastic.Actions[actionName] && typeof Pixastic.Actions[actionName].process == "function") {
validAction = true;
}
if (!validAction) {
if (Pixastic.debug) writeDebug("Invalid action \"" + actionName + "\". Maybe file not included?");
return false;
}
if (!Pixastic.Actions[actionName].checkSupport()) {
if (Pixastic.debug) writeDebug("Action \"" + actionName + "\" not supported by this browser.");
return false;
}
if (Pixastic.Client.hasCanvas()) {
if (canvas !== img) {
canvas.width = w;
canvas.height = h;
}
if (!hasOutputCanvas) {
canvas.style.width = w+"px";
canvas.style.height = h+"px";
}
ctx.drawImage(dataImg,0,0,w,h);
if (!img.__pixastic_org_image) {
canvas.__pixastic_org_image = img;
canvas.__pixastic_org_width = w;
canvas.__pixastic_org_height = h;
} else {
canvas.__pixastic_org_image = img.__pixastic_org_image;
canvas.__pixastic_org_width = img.__pixastic_org_width;
canvas.__pixastic_org_height = img.__pixastic_org_height;
}
} else if (Pixastic.Client.isIE() && typeof img.__pixastic_org_style == "undefined") {
img.__pixastic_org_style = img.style.cssText;
}
var params = {
image : img,
canvas : canvas,
width : w,
height : h,
useData : true,
options : options
}
// Ok, let's do it!
var res = Pixastic.Actions[actionName].process(params);
if (!res) {
return false;
}
if (Pixastic.Client.hasCanvas()) {
if (params.useData) {
if (Pixastic.Client.hasCanvasImageData()) {
canvas.getContext("2d").putImageData(params.canvasData, options.rect.left, options.rect.top);
// Opera doesn't seem to update the canvas until we draw something on it, lets draw a 0x0 rectangle.
// Is this still so?
canvas.getContext("2d").fillRect(0,0,0,0);
}
}
if (!options.leaveDOM) {
// copy properties and stuff from the source image
canvas.title = img.title;
canvas.imgsrc = img.imgsrc;
if (!imageIsCanvas) canvas.alt = img.alt;
if (!imageIsCanvas) canvas.imgsrc = img.src;
canvas.className = img.className;
canvas.style.cssText = img.style.cssText;
canvas.name = img.name;
canvas.tabIndex = img.tabIndex;
canvas.id = img.id;
if (img.parentNode && img.parentNode.replaceChild) {
img.parentNode.replaceChild(canvas, img);
}
}
options.resultCanvas = canvas;
return canvas;
}
return img;
},
prepareData : function(params, getCopy) {
var ctx = params.canvas.getContext("2d");
var rect = params.options.rect;
var dataDesc = ctx.getImageData(rect.left, rect.top, rect.width, rect.height);
var data = dataDesc.data;
if (!getCopy) params.canvasData = dataDesc;
return data;
},
// load the image file
process : function(img, actionName, options, callback) {
if (img.tagName.toLowerCase() == "img") {
var dataImg = new Image();
dataImg.src = img.src;
if (dataImg.complete) {
var res = Pixastic.applyAction(img, dataImg, actionName, options);
if (callback) callback(res);
return res;
} else {
dataImg.onload = function() {
var res = Pixastic.applyAction(img, dataImg, actionName, options)
if (callback) callback(res);
}
}
}
if (img.tagName.toLowerCase() == "canvas") {
var res = Pixastic.applyAction(img, img, actionName, options);
if (callback) callback(res);
return res;
}
},
revert : function(img) {
if (Pixastic.Client.hasCanvas()) {
if (img.tagName.toLowerCase() == "canvas" && img.__pixastic_org_image) {
img.width = img.__pixastic_org_width;
img.height = img.__pixastic_org_height;
img.getContext("2d").drawImage(img.__pixastic_org_image, 0, 0);
if (img.parentNode && img.parentNode.replaceChild) {
img.parentNode.replaceChild(img.__pixastic_org_image, img);
}
return img;
}
} else if (Pixastic.Client.isIE()) {
if (typeof img.__pixastic_org_style != "undefined")
img.style.cssText = img.__pixastic_org_style;
}
},
Client : {
hasCanvas : hasCanvas,
hasCanvasImageData : hasCanvasImageData,
hasGlobalAlpha : hasGlobalAlpha,
isIE : function() {
return !!document.all && !!window.attachEvent && !window.opera;
}
},
Actions : {}
}
})();

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pixastic.jquery.js
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/*
* Pixastic Lib - jQuery plugin
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* License: [http://www.pixastic.com/lib/license.txt]
*/
if (typeof jQuery != "undefined" && jQuery && jQuery.fn) {
jQuery.fn.pixastic = function(action, options) {
var newElements = [];
this.each(
function () {
if (this.tagName.toLowerCase() == "img" && !this.complete) {
return;
}
if (action === "revert") {
var res = Pixastic.revert(this);
} else {
var res = Pixastic.process(this, action, options);
}
if (res) {
newElements.push(res);
}
}
);
if (newElements.length > 0)
return jQuery(newElements);
else
return this;
};
};

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/*!
* Pixastic - JavaScript Image Processing
* http://pixastic.com/
* Copyright 2012, Jacob Seidelin
*
* Dual licensed under the MPL 1.1 or GPLv3 licenses.
* http://pixastic.com/license-mpl.txt
* http://pixastic.com/license-gpl-3.0.txt
*
*/
var Pixastic = (function() {
var worker;
function createImageData(ctx, width, height) {
if (ctx.createImageData) {
return ctx.createImageData(width, height);
} else {
return ctx.getImageData(0, 0, width, height);
}
}
function Pixastic(ctx, workerControlPath) {
var P = {},
width = ctx.canvas.width,
height = ctx.canvas.height,
queue = [],
workerControlPath = workerControlPath || "";
if (!worker) {
if (typeof window.Worker != "undefined") {
try {
worker = new window.Worker(workerControlPath + "pixastic.worker.control.js");
} catch(e) {
if (location.protocol == "file:") {
Pixastic.log("Could not create native worker, running from file://")
} else {
Pixastic.log("Could not create native worker.")
}
}
}
if (!worker) {
worker = new Pixastic.Worker();
}
}
for (var e in Pixastic.Effects) {
if (Pixastic.Effects.hasOwnProperty(e)) {
(function(e) {
P[e] = function(options) {
queue.push({
effect : e,
options : options
});
return P;
}
P.done = function(callback, progress) {
var inData, outData;
try {
inData = ctx.getImageData(0, 0, width, height);
} catch(e) {
if (location.protocol == "file:") {
throw new Error("Could not access image data, running from file://");
} else {
throw new Error("Could not access image data, is canvas tainted by cross-origin data?");
}
}
outData = createImageData(ctx, width, height);
worker.postMessage({
queue : queue,
inData : inData,
outData : outData,
width : width,
height : height
});
worker.onmessage = function(message) {
var d = message.data;
switch (d.event) {
case "done" :
ctx.putImageData(d.data, 0, 0);
if (callback) {
callback();
}
if (progress) {
progress(1);
}
break;
case "progress" :
if (progress) {
progress(d.data);
}
break;
case "error" :
break;
}
}
if (progress) {
progress(0);
}
}
})(e);
}
}
return P;
}
Pixastic.Worker = function() {
var me = this;
function processMessage(data) {
var queue = data.queue,
inData = data.inData,
outData = data.outData,
width = data.width,
height = data.height,
tmpData;
for (var i=0;i<queue.length;i++) {
var e = queue[i].effect,
options = queue[i].options,
progressCallback;
if (i > 0) {
tmpData = inData;
inData = outData;
outData = tmpData;
}
if (typeof importScripts == "function") {
progressCallback = function(p) {
me.onmessage({
data : {
event : "progress",
data : (i + p) / queue.length
}
});
return p;
}
}
Pixastic.Effects[e](inData.data, outData.data, width, height, options, progressCallback);
me.onmessage({
data : {
event : "progress",
data : (i+1) / queue.length
}
});
}
me.onmessage({
data : {
event : "done",
data : outData
}
});
}
this.postMessage = function(data) {
setTimeout(function() {
processMessage(data)
}, 0);
};
this.onmessage = function() {};
}
Pixastic.log = function(str) {
if (typeof console != "undefined" && console.log) {
console.log("Pixastic: " + str);
}
};
function toCanvas(o) {
var canvas;
if (typeof o == "object") {
if (typeof o.tagName == "string") {
if (o.tagName.toLowerCase() == "canvas" || o.tagName.toLowerCase() == "img") {
canvas = document.createElement("canvas");
canvas.width = o.width;
canvas.height = o.height;
canvas.getContext("2d").drawImage(o, 0,0);
}
} else if ((window.ImageData && o instanceof window.ImageData)
|| (typeof o.width == "number" && typeof o.height == "number" && typeof o.data == "object")) {
canvas = document.createElement("canvas");
canvas.width = o.width;
canvas.height = o.height;
canvas.getContext("2d").putImageData(o, 0, 0);
}
}
return canvas;
};
function toImage(o) {
var canvas = toCanvas(o),
image = new Image();
image.width = canvas.width;
image.height = canvas.height;
image.src = canvas.toDataURL();
return image;
};
function toImageData(o) {
var canvas = toCanvas(o),
ctx = canvas.getContext("2d");
return ctx.getImageData(0, 0, canvas.width, canvas.height);
};
function histogram(imageData) {
var values = [],
i, p,
data = imageData.data,
round = Math.round,
maxValue,
n = imageData.width * imageData.height;
for (i=0;i<256;i++) {
values[i] = 0;
}
for (i=0;i<n;i++) {
p = i * 4;
values[ round((data[p]+data[p+1]+data[p+2])/3) ]++;
}
maxValue = 0;
for (i=0;i<256;i++) {
if (values[i] > maxValue) {
maxValue = values[i];
}
}
return {
maxValue : maxValue,
values : values
};
}
Pixastic.toCanvas = toCanvas;
Pixastic.toImage = toImage;
Pixastic.toImageData = toImageData;
Pixastic.histogram = histogram;
Pixastic.Color = {
rgb2hsl : function(r, g, b) {
if (r < 0) r = 0;
if (g < 0) g = 0;
if (b < 0) b = 0;
if (r > 255) r = 0;
if (g > 255) g = 0;
if (b > 255) b = 0;
},
rgb2hsv : function(r, g, b) {
},
rgb2hex : function(r, g, b) {
},
hsl2rgb : function(h, s, l) {
},
hsv2rgb : function(h, s, v) {
}
}
return Pixastic;
})();

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importScripts("pixastic.js");
importScripts("pixastic.effects.js");
var worker = new Pixastic.Worker();
worker.onmessage = function(message) {
postMessage(message.data);
}
onmessage = function(message) {
worker.postMessage(message.data);
}

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Pixastic.Worker = function() {
var me = this;
function processMessage(data) {
var queue = data.queue,
inData = data.inData,
outData = data.outData,
width = data.width,
height = data.height,
tmpData;
for (var i=0;i<queue.length;i++) {
var e = queue[i].effect,
options = queue[i].options;
if (i > 0) {
tmpData = inData;
inData = outData;
outData = tmpData;
}
Pixastic.Effects[e](inData.data, outData.data, width, height, options);
me.onmessage({
data : {
event : "progress",
data : (i+1) / queue.length
}
});
}
me.onmessage({
data : {
event : "done",
data : outData
}
});
}
this.postMessage = function(data) {
setTimeout(function() {
processMessage(data)
}, 0);
}
this.onmessage = function() {};
}

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#original-image,
#output-canvas {
display : block;
float : left;
margin : 10px;
}
ul#testlist {
display : block;
float : left;
width : 300px;
list-style : none;
padding : 0;
margin : 10px;
max-height : 512px;
overflow : auto;
}
ul#testlist li {
margin-bottom : 5px;
background-color : rgb(200,220,255);
padding : 4px;
font-family : sans-serif;
font-size : 14px;
cursor : pointer;
}
ul#testlist li:hover {
background-color : rgb(200,240,255);
}
div#progress {
float : left;
width : 20px;
height : 512px;
margin-top : 10px;
box-sizing : border-box;
border : 1px solid black;
}
div#progress div {
width : 100%;
height : 0;
background-color : rgb(190,220,190);
}