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root 2009-01-15 12:07:26 +01:00
parent d946e6c3bf
commit 07f6c84e18
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326
actions/blend.js Executable file
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/*
* Pixastic Lib - Blend - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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));
var amount1 = 1 - amount;
var amount2 = amount;
if (!image) return false;
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var rect = params.options.rect;
var w = rect.width;
var h = rect.height;
var otherCanvas = document.createElement("canvas");
otherCanvas.width = w;
otherCanvas.height = h;
var otherCtx = otherCanvas.getContext("2d");
otherCtx.drawImage(image,0,0);
var data2 = otherCtx.getImageData(0,0,w,h).data;
var w4 = w*4;
var y = h;
var p = w*h;
switch (mode) {
case "normal" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
data[offset] = r1 * amount1 + amount2 * r2;
data[offset+1] = g1 * amount1 + amount2 * g2;
data[offset+2] = b1 * amount1 + amount2 * b2;
}
break;
case "multiply" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
data[offset] = r1 * amount1 + amount2 * (r1 * r2 / 255);
data[offset+1] = g1 * amount1 + amount2 * (g1 * g2 / 255);
data[offset+2] = b1 * amount1 + amount2 * (b1 * b2 / 255);
}
break;
case "lighten" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
data[offset] = r1 * amount1 + amount2 * (r1 > r2 ? r1 : r2);
data[offset+1] = g1 * amount1 + amount2 * (g1 > g2 ? g1 : g2);
data[offset+2] = b1 * amount1 + amount2 * (b1 > b2 ? b1 : b2);
}
break;
case "darken" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
data[offset] = r1 * amount1 + amount2 * (r1 < r2 ? r1 : r2);
data[offset+1] = g1 * amount1 + amount2 * (g1 < g2 ? g1 : g2);
data[offset+2] = b1 * amount1 + amount2 * (b1 < b2 ? b1 : b2);
}
break;
case "average" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
data[offset] = r1 * amount1 + amount2 * ((r1 + r2) / 2);
data[offset+1] = g1 * amount1 + amount2 * ((g1 + g2) / 2);
data[offset+2] = b1 * amount1 + amount2 * ((b1 + b2) / 2);
}
break;
case "lineardodge" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = r1+r2, g3 = g1+g2, b3 = b1+b2;
data[offset] = r1 * amount1 + amount2 * (r3 > 255 ? 255 : r3);
data[offset+1] = g1 * amount1 + amount2 * (g3 > 255 ? 255 : g3);
data[offset+2] = b1 * amount1 + amount2 * (b3 > 255 ? 255 : b3);
}
break;
case "linearburn" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (r2+r1 < 255) ? 0 : (r2+r1-255);
var g3 = (g2+g1 < 255) ? 0 : (g2+g1-255);
var b3 = (b2+b1 < 255) ? 0 : (b2+b1-255);
data[offset] = r1 * amount1 + amount2 * (r3 < 0 ? 0 : r3);
data[offset+1] = g1 * amount1 + amount2 * (g3 < 0 ? 0 : g3);
data[offset+2] = b1 * amount1 + amount2 * (b3 < 0 ? 0 : b3);
}
break;
case "difference" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = r1-r2, g3 = g1-g2, b3 = b1-b2;
data[offset] = r1 * amount1 + amount2 * (r3 < 0 ? -r3 : r3);
data[offset+1] = g1 * amount1 + amount2 * (g3 < 0 ? -g3 : g3);
data[offset+2] = b1 * amount1 + amount2 * (b3 < 0 ? -b3 : b3);
}
break;
case "screen" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (255 - (((255 - r2) * (255 - r1)) >> 8));
var g3 = (255 - (((255 - g2) * (255 - g1)) >> 8));
var b3 = (255 - (((255 - b2) * (255 - b1)) >> 8));
data[offset] = r1 * amount1 + amount2 * r3;
data[offset+1] = g1 * amount1 + amount2 * g3;
data[offset+2] = b1 * amount1 + amount2 * b3;
}
break;
case "exclusion" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = r2 + r1 - 2 * r2 * r1 / 255;
var g3 = g2 + g1 - 2 * g2 * g1 / 255;
var b3 = b2 + b1 - 2 * b2 * b1 / 255;
data[offset] = r1 * amount1 + amount2 * r3;
data[offset+1] = g1 * amount1 + amount2 * g3;
data[offset+2] = b1 * amount1 + amount2 * b3;
}
break;
case "overlay" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = ((r1 < 128) ? (2*r2*r1/255) : (255-2*(255-r2) * (255-r1)/255));
var g3 = ((g1 < 128) ? (2*g2*g1/255) : (255-2*(255-g2) * (255-g1)/255));
var b3 = ((b1 < 128) ? (2*b2*b1/255) : (255-2*(255-b2) * (255-b1)/255));
data[offset] = r1 * amount1 + amount2 * r3;
data[offset+1] = g1 * amount1 + amount2 * g3;
data[offset+2] = b1 * amount1 + amount2 * b3;
}
break;
case "softlight" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = ((r1 < 128) ? (2*((r2>>1)+64))*(r1/255) : (255-(2*(255-((r2>>1)+64))*(255-r1)/255)));
var g3 = ((g1 < 128) ? (2*((g2>>1)+64))*(g1/255) : (255-(2*(255-((g2>>1)+64))*(255-g1)/255)));
var b3 = ((b1 < 128) ? (2*((b2>>1)+64))*(b1/255) : (255-(2*(255-((b2>>1)+64))*(255-b1)/255)));
data[offset] = r1 * amount1 + amount2 * r3;
data[offset+1] = g1 * amount1 + amount2 * g3;
data[offset+2] = b1 * amount1 + amount2 * b3;
}
break;
case "hardlight" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = ((r2 < 128) ? (2*r1*r2/255) : (255-2*(255-r1) * (255-r2)/255));
var g3 = ((g2 < 128) ? (2*g1*g2/255) : (255-2*(255-g1) * (255-g2)/255));
var b3 = ((b2 < 128) ? (2*b1*b2/255) : (255-2*(255-b1) * (255-b2)/255));
data[offset] = r1 * amount1 + amount2 * r3;
data[offset+1] = g1 * amount1 + amount2 * g3;
data[offset+2] = b1 * amount1 + amount2 * b3;
}
break;
case "colordodge" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (r2 == 255) ? 255 : ((r1<<8)/(255-r2));
var g3 = (g2 == 255) ? 255 : ((g1<<8)/(255-g2));
var b3 = (b2 == 255) ? 255 : ((b1<<8)/(255-b2));
data[offset] = r1 * amount1 + amount2 * (r3 > 255 ? 255 : r3);
data[offset+1] = g1 * amount1 + amount2 * (g3 > 255 ? 255 : g3);
data[offset+2] = b1 * amount1 + amount2 * (b3 > 255 ? 255 : b3);
}
break;
case "colorburn" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (r2 == 0) ? 0 : (255-((255-r1)<<8)/r2);
var g3 = (g2 == 0) ? 0 : (255-((255-g1)<<8)/g2);
var b3 = (b2 == 0) ? 0 : (255-((255-b1)<<8)/b2);
data[offset] = r1 * amount1 + amount2 * (r3 < 0 ? 0 : r3);
data[offset+1] = g1 * amount1 + amount2 * (g3 < 0 ? 0 : g3);
data[offset+2] = b1 * amount1 + amount2 * (b3 < 0 ? 0 : b3);
}
break;
case "linearlight" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (r2 < 128) ? ((2*r2+r1 < 255) ? 0 : (2*r2+r1-255)) : (r1+(2*(r2-128)));
var g3 = (g2 < 128) ? ((2*g2+g1 < 255) ? 0 : (2*g2+g1-255)) : (g1+(2*(g2-128)));
var b3 = (b2 < 128) ? ((2*b2+r1 < 255) ? 0 : (2*b2+r1-255)) : (b1+(2*(b2-128)));
if (r3 > 255) r3 = 255;
if (g3 > 255) g3 = 255;
if (b3 > 255) b3 = 255;
data[offset] = r1 * amount1 + amount2 * (r3 < 0 ? 0 : r3);
data[offset+1] = g1 * amount1 + amount2 * (g3 < 0 ? 0 : g3);
data[offset+2] = b1 * amount1 + amount2 * (b3 < 0 ? 0 : b3);
}
break;
case "vividlight" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (r2 < 128) ? ((r2 == 0) ? 0 : (255-((255-r1)<<8)/(2*r2))) :
(((2*(r2-128)) == 255) ? 255 : ((r1<<8)/(255-(2*(r2-128)))));
var g3 = (g2 < 128) ? ((g2 == 0) ? 0 : (255-((255-g1)<<8)/(2*g2))) :
(((2*(g2-128)) == 255) ? 255 : ((g1<<8)/(255-(2*(g2-128)))));
var b3 = (b2 < 128) ? ((b2 == 0) ? 0 : (255-((255-b1)<<8)/(2*b2))) :
(((2*(b2-128)) == 255) ? 255 : ((b1<<8)/(255-(2*(b2-128)))));
if (r3 > 255) r3 = 255;
if (g3 > 255) g3 = 255;
if (b3 > 255) b3 = 255;
data[offset] = r1 * amount1 + amount2 * (r3 < 0 ? 0 : r3);
data[offset+1] = g1 * amount1 + amount2 * (g3 < 0 ? 0 : g3);
data[offset+2] = b1 * amount1 + amount2 * (b3 < 0 ? 0 : b3);
}
break;
case "pinlight" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (r2 < 128) ? (r1 < (2*r2) ? r1 : (2*r2)) : (r1 > (2*(r2-128)) ? r1 : (2*(r2-128)));
var g3 = (g2 < 128) ? (g1 < (2*g2) ? g1 : (2*g2)) : (g1 > (2*(g2-128)) ? g1 : (2*(g2-128)));
var b3 = (b2 < 128) ? (b1 < (2*b2) ? b1 : (2*b2)) : (b1 > (2*(b2-128)) ? b1 : (2*(b2-128)));
data[offset] = r1 * amount1 + amount2 * r3;
data[offset+1] = g1 * amount1 + amount2 * g3;
data[offset+2] = b1 * amount1 + amount2 * b3;
}
break;
case "hardmix" :
while (p--) {
var offset = p*4;
var r1 = data[offset], g1 = data[offset+1], b1 = data[offset+2];
var r2 = data2[offset], g2 = data2[offset+1], b2 = data2[offset+2];
var r3 = (r2 < 128) ? ((r2 == 0) ? 0 : (255-((255-r1)<<8)/(2*r2))) :
(((2*(r2-128)) == 255) ? 255 : ((r1<<8)/(255-(2*(r2-128)))));
var g3 = (g2 < 128) ? ((g2 == 0) ? 0 : (255-((255-g1)<<8)/(2*g2))) :
(((2*(g2-128)) == 255) ? 255 : ((g1<<8)/(255-(2*(g2-128)))));
var b3 = (b2 < 128) ? ((b2 == 0) ? 0 : (255-((255-b1)<<8)/(2*b2))) :
(((2*(b2-128)) == 255) ? 255 : ((b1<<8)/(255-(2*(b2-128)))));
data[offset] = r1 * amount1 + amount2 * (r3 < 128 ? 0 : 255);
data[offset+1] = g1 * amount1 + amount2 * (g3 < 128 ? 0 : 255);
data[offset+2] = b1 * amount1 + amount2 * (b3 < 128 ? 0 : 255);
}
break;
/*
#define ChannelBlend_HardMix(B,L) ((uint8)((ChannelBlend_VividLight(B,L) < 128) ? 0:255))
#define ChannelBlend_Reflect(B,L) ((uint8)((L == 255) ? L:min(255, (B * B / (255 - L)))))
#define ChannelBlend_Glow(B,L) (ChannelBlend_Reflect(L,B))
#define ChannelBlend_Phoenix(B,L) ((uint8)(min(B,L) - max(B,L) + 255))
#define ChannelBlend_Alpha(B,L,O) ((uint8)(O * B + (1 - O) * L))
#define ChannelBlend_AlphaF(B,L,F,O) (ChannelBlend_Alpha(F(B,L),B,O))
*/
}
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvasImageData();
}
}

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actions/blur.js Executable file
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/*
* Pixastic Lib - Blur filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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());
}
}

81
actions/blurfast.js Executable file
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/*
* Pixastic Lib - Blur Fast - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.blurfast = {
process : function(params) {
var amount = parseFloat(params.options.amount)||0;
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.moveTo(rect.left,rect.top);
ctx.lineTo(rect.left+rect.width,rect.top);
ctx.lineTo(rect.left+rect.width,rect.top+rect.height);
ctx.lineTo(rect.left,rect.top+rect.height);
ctx.lineTo(rect.left,rect.top);
ctx.closePath();
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 = true;
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());
}
}

71
actions/brightness.js Executable file
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/*
* Pixastic Lib - Brightness/Contrast filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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);
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 w4 = w*4;
var y = h;
do {
var offsetY = (y-1)*w4;
var x = w;
do {
var offset = offsetY + (x-1)*4;
if (legacy) {
var r = data[offset] + brightness;
var g = data[offset+1] + brightness;
var b = data[offset+2] + brightness;
} else {
var r = data[offset] * brightMul;
var g = data[offset+1] * brightMul;
var b = data[offset+2] * brightMul;
}
if (contrast != 1) {
r = (r - 128) * contrast + 128;
g = (g - 128) * contrast + 128;
b = (b - 128) * contrast + 128;
}
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();
}
}

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/*
* Pixastic Lib - Color adjust filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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 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] + red;
var g = data[offset+1] + green;
var b = data[offset+2] + blue;
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());
}
}

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/*
* Pixastic Lib - Crop - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.crop = {
process : function(params) {
if (Pixastic.Client.hasCanvas()) {
var rect = params.options.rect;
var copy = document.createElement("canvas");
copy.width = params.width;
copy.height = params.height;
copy.getContext("2d").drawImage(params.canvas,0,0);
params.canvas.width = rect.width;
params.canvas.height = rect.height;
params.canvas.getContext("2d").clearRect(0,0,rect.width,rect.height);
params.canvas.getContext("2d").drawImage(copy,
rect.left,rect.top,rect.width,rect.height,
0,0,rect.width,rect.height
);
params.useData = false;
return true;
}
},
checkSupport : function() {
return Pixastic.Client.hasCanvas();
}
}

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/*
* Pixastic Lib - Desaturation filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.desaturate = {
process : function(params) {
var useAverage = !!params.options.average;
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 brightness = useAverage ?
(data[offset]+data[offset+1]+data[offset+2])/3
: (data[offset]*0.3 + data[offset+1]*0.59 + data[offset+2]*0.11);
data[offset] = data[offset+1] = data[offset+2] = brightness;
} while (--x);
} while (--y);
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " gray";
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
}
}

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/*
* Pixastic Lib - Edge detection filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.edges = {
process : function(params) {
var mono = !!(params.options.mono);
var strength = 1.0;
//if (typeof params.options.strength != "undefined")
// strength = parseFloat(params.options.strength)||0;
var invert = !!(params.options.invert);
if (Pixastic.Client.hasCanvasImageData()) {
var data = Pixastic.prepareData(params);
var dataCopy = Pixastic.prepareData(params, true)
var c = -strength/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();
}
}

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/*
* Pixastic Lib - Edge detection 2 - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*
* 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();
}
}

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/*
* Pixastic Lib - Emboss filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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;
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());
}
}

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actions/fliph.js Executable file
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/*
* Pixastic Lib - Horizontal flip - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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());
}
}

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/*
* Pixastic Lib - Vertical flip - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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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/*
* Pixastic Lib - Glow - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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 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 r = data[offset] + amount * blurData[offset];
var g = data[offset+1] + amount * blurData[offset+1];
var b = data[offset+2] + amount * blurData[offset+2];
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[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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/*
* Pixastic Lib - Histogram - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.histogram = {
process : function(params) {
var average = !!(params.options.average);
var paint = !!(params.options.paint);
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 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 brightness = average ?
Math.round((data[offset]+data[offset+1]+data[offset+2])/3)
: Math.round(data[offset]*0.3 + data[offset+1]*0.59 + data[offset+2]*0.11);
values[brightness]++;
} while (--x);
} while (--y);
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();
}
}

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/*
* Pixastic Lib - HSL Adjust - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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 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 r = data[offset];
var g = data[offset+1];
var b = data[offset+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)/255 * 0.5;
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;
switch (sextant) {
case 0: r = v*255; g = (m+((v-m)*(h-sextant)))*255; b = m*255; break;
case 1: r = (v-((v-m)*(h-sextant)))*255; g = v*255; b = m*255; break;
case 2: r = m*255; g = v*255; b = (m+((v-m)*(h-sextant)))*255; break;
case 3: r = m*255; g = (v-((v-m)*(h-sextant)))*255; b = v*255; break;
case 4: r = (m+((v-m)*(h-sextant)))*255; g = m*255; b = v*255; break;
case 5: r = v*255; g = m*255; b = (v-((v-m)*(h-sextant)))*255; break;
}
}
}
}
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) 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();
}
}

40
actions/invert.js Executable file
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/*
* Pixastic Lib - Invert filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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 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;
data[offset] = 255 - data[offset];
data[offset+1] = 255 - data[offset+1];
data[offset+2] = 255 - data[offset+2];
if (invertAlpha) data[offset+3] = 255 - data[offset+3];
} while (--x);
} while (--y);
return true;
} else if (Pixastic.Client.isIE()) {
params.image.style.filter += " invert";
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
}
}

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actions/laplace.js Executable file
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/*
* Pixastic Lib - Laplace filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.laplace = {
process : function(params) {
var strength = 1.0;
var invert = !!(params.options.invert);
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();
}
}

73
actions/lighten.js Executable file
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/*
* Pixastic Lib - Lighten filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.lighten = {
process : function(params) {
var amount = parseFloat(params.options.amount) || 0;
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];
r += r*amount;
g += g*amount;
b += b*amount;
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;
} 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());
}
}

48
actions/mosaic.js Executable file
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/*
* Pixastic Lib - Mosaic filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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) {
pixelCtx.drawImage(copy, x, y, blockSize, blockSize, 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());
}
}

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/*
* Pixastic Lib - Noise filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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);
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();
}
}

71
actions/pointillize.js Executable file
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/*
* Pixastic Lib - Pointillize filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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;
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);
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;
pixelCtx.drawImage(copy, pixX, pixY, diameter, diameter, 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(rect.left + rndX,rect.top + rndY, radius, 0, Math.PI*2, true);
ctx.closePath();
ctx.fill();
}
}
params.useData = false;
return true;
}
},
checkSupport : function() {
return (Pixastic.Client.hasCanvasImageData());
}
}

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actions/posterize.js Executable file
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/*
* Pixastic Lib - Posterize effect - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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 Executable file
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/*
* Pixastic Lib - Remove noise - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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();
}
}

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actions/sepia.js Executable file
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/*
* Pixastic Lib - Sepia filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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();
}
}

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actions/sharpen.js Executable file
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/*
* Pixastic Lib - Sharpen filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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();
}
}

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actions/solarize - Kopi.js Executable file
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/*
* Pixastic Lib - Solarize filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.solarize = {
process : function(params) {
var useAverage = !!params.options.average;
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];
//r = (r > 127 ? 2 * (r - 127) : 2 * (127 - r));
//g = (g > 127 ? 2 * (g - 127) : 2 * (127 - g));
//b = (b > 127 ? 2 * (b - 127) : 2 * (127 - b));
r = r > 127 ? 255 - r : r;
g = g > 127 ? 255 - g : g;
b = b > 127 ? 255 - b : 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());
}
}

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actions/solarize.js Executable file
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/*
* Pixastic Lib - Solarize filter - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
Pixastic.Actions.solarize = {
process : function(params) {
var useAverage = !!params.options.average;
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());
}
}

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actions/unsharpmask.js Executable file
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/*
* Pixastic Lib - USM - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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();
}
}

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pixastic.core.js Executable file
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/*
* Pixastic Lib - Core Functions - v0.1.0
* Copyright (c) 2008 Jacob Seidelin, cupboy@gmail.com, http://blog.nihilogic.dk/
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*/
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_sumbox__\"></"+"script>");
var script = document.getElementById("__onload_ie_sumbox__");
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() {
if (!Pixastic.parseOnLoad) return;
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 == "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);
}
}
})();
}
}
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) {
}
}
return {
parseOnLoad : false,
debug : false,
applyAction : function(img, dataImg, actionName, options) {
options = options || {};
var imageIsCanvas = (img.tagName == "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;
if (Pixastic.Client.hasCanvas()) {
canvas = document.createElement("canvas");
ctx = canvas.getContext("2d");
}
var w = parseInt(img.offsetWidth);
var h = parseInt(img.offsetHeight);
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
};
}
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()) {
canvas.width = w;
canvas.height = h;
canvas.style.width = w+"px";
canvas.style.height = h+"px";
ctx.drawImage(dataImg,0,0,w,h);
}
var params = {
image : img,
canvas : canvas,
width : w,
height : h,
useData : true,
options : options
}
//var time = new Date().getTime();
var res = Pixastic.Actions[actionName].process(params);
//console.log("Time:",new Date().getTime() - time,"ms");
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.
canvas.getContext("2d").fillRect(0,0,0,0);
}
}
// 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.setAttribute("style", img.getAttribute("style"));
canvas.cssText = img.cssText;
canvas.name = img.name;
canvas.tabIndex = img.tabIndex;
canvas.id = img.id;
if (img.parentNode && img.parentNode.replaceChild) {
img.parentNode.replaceChild(canvas, img);
}
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 == "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 == "CANVAS") {
var res = Pixastic.applyAction(img, img, actionName, options);
if (callback) callback(res);
return res;
}
},
Client : {
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;
}
})(),
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;
}
})(),
isIE : function() {
return !!document.all && !!window.attachEvent && !window.opera;
}
},
Actions : {}
}
})();

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pixastic.jquery.js Executable file
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if (typeof jQuery != "undefined" && jQuery && jQuery.fn) {
jQuery.fn.pixastic = function(action, options) {
var newElements = [];
this.each(
function () {
if (this.tagName == "IMG" && !this.complete) {
return;
}
var res = Pixastic.process(this, action, options);
if (res) {
newElements.push(res);
}
}
);
if (newElements.length > 0)
return jQuery(newElements);
else
return this;
};
};