69 lines
2.1 KiB
JavaScript
69 lines
2.1 KiB
JavaScript
function Filter_Chromatic()
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{
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Filter.call(this);
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this.parameters = [Value, Position];
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//value is maximum distance pixels are shifted
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//position is where the pixels are shifted from, defaults to half the image
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this.render = function(cmd)
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{
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var position = cmd.position() ? cmd.position() : new Position(ronin.surface.size.width,ronin.surface.size.height);
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var value = cmd.value() ? cmd.value().float : 5;
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ronin.overlay.clear();
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this.draw(this.context(),value,position);
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ronin.overlay.clear();
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}
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this.preview = function(cmd)
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{
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if(cmd.position()){
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ronin.overlay.clear();
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ronin.overlay.draw_pointer(cmd.position());
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}
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}
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this.draw = function(context = this.context(), value, position)
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{
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var w = ronin.surface.size.width;
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var h = ronin.surface.size.height;
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//no longer letting you set how far each chanel is shifted, not sure how to receive extra data any more
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var s = {r:value,g:value*.5,b:0};
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var context = ronin.surface.active_layer.context();
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//now need two imagedatas to sample off of, for some reason I cant just dump the new pixels into an empty array :/
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var originalData = context.getImageData(0, 0, w*2, h*2);
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var imageData = context.getImageData(0, 0, w*2, h*2);
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var maxLength = Math.sqrt(w*w+h*h);
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for (var i=0; i<w*2; i++) {
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for(var j=0; j<h*2; j++){
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var x = i-position.x;
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var y = j-position.y;
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var a = Math.atan2(y,x);
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var d = Math.sqrt(x*x+y*y);
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var f = (d-s.r*d/maxLength);
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x = Math.cos(a)*f+position.x;
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y = Math.sin(a)*f+position.y;
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var r = this.get_color_bilinear(originalData, x, y);
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f = (d-s.g*d/maxLength);
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x = Math.cos(a)*f+position.x;
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y = Math.sin(a)*f+position.y;
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var g = this.get_color_bilinear(originalData, x, y);
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f = (d-s.b*d/maxLength);
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x = Math.cos(a)*f+position.x;
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y = Math.sin(a)*f+position.y;
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var b = this.get_color_bilinear(originalData, x, y);
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var c = {r:r.r, g:g.g, b:b.b,a:Math.max(r.a, Math.max(g.a,b.a))};
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this.set_color(imageData, c, i,j);
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}
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}
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ronin.surface.active_layer.clear();
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context.putImageData(imageData, 0, 0);
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}
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}
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