bodymovin
Version:
After Effects plugin for exporting animations to SVG + JavaScript or canvas + JavaScript
101 lines (89 loc) • 6.42 kB
JavaScript
function SVGProLevelsFilter(filter, filterManager){
this.filterManager = filterManager;
var effectElements = this.filterManager.effectElements;
var feComponentTransfer = document.createElementNS(svgNS,'feComponentTransfer');
var feFuncR, feFuncG, feFuncB;
if(effectElements[9].p.k || effectElements[9].p.v !== 0 || effectElements[10].p.k || effectElements[10].p.v !== 1 || effectElements[11].p.k || effectElements[11].p.v !== 1 || effectElements[12].p.k || effectElements[12].p.v !== 0 || effectElements[13].p.k || effectElements[13].p.v !== 1){
this.feFuncR = this.createFeFunc('feFuncR', feComponentTransfer);
}
if(effectElements[16].p.k || effectElements[16].p.v !== 0 || effectElements[17].p.k || effectElements[17].p.v !== 1 || effectElements[18].p.k || effectElements[18].p.v !== 1 || effectElements[19].p.k || effectElements[19].p.v !== 0 || effectElements[20].p.k || effectElements[20].p.v !== 1){
this.feFuncG = this.createFeFunc('feFuncG', feComponentTransfer);
}
if(effectElements[23].p.k || effectElements[23].p.v !== 0 || effectElements[24].p.k || effectElements[24].p.v !== 1 || effectElements[25].p.k || effectElements[25].p.v !== 1 || effectElements[26].p.k || effectElements[26].p.v !== 0 || effectElements[27].p.k || effectElements[27].p.v !== 1){
this.feFuncB = this.createFeFunc('feFuncB', feComponentTransfer);
}
if(effectElements[30].p.k || effectElements[30].p.v !== 0 || effectElements[31].p.k || effectElements[31].p.v !== 1 || effectElements[32].p.k || effectElements[32].p.v !== 1 || effectElements[33].p.k || effectElements[33].p.v !== 0 || effectElements[34].p.k || effectElements[34].p.v !== 1){
this.feFuncA = this.createFeFunc('feFuncA', feComponentTransfer);
}
if(this.feFuncR || this.feFuncG || this.feFuncB || this.feFuncA){
feComponentTransfer.setAttribute('color-interpolation-filters','sRGB');
filter.appendChild(feComponentTransfer);
feComponentTransfer = document.createElementNS(svgNS,'feComponentTransfer');
}
if(effectElements[2].p.k || effectElements[2].p.v !== 0 || effectElements[3].p.k || effectElements[3].p.v !== 1 || effectElements[4].p.k || effectElements[4].p.v !== 1 || effectElements[5].p.k || effectElements[5].p.v !== 0 || effectElements[6].p.k || effectElements[6].p.v !== 1){
feComponentTransfer.setAttribute('color-interpolation-filters','sRGB');
filter.appendChild(feComponentTransfer);
this.feFuncRComposed = this.createFeFunc('feFuncR', feComponentTransfer);
this.feFuncGComposed = this.createFeFunc('feFuncG', feComponentTransfer);
this.feFuncBComposed = this.createFeFunc('feFuncB', feComponentTransfer);
}
}
SVGProLevelsFilter.prototype.createFeFunc = function(type, feComponentTransfer) {
var feFunc = document.createElementNS(svgNS,type);
feFunc.setAttribute('type','table');
feComponentTransfer.appendChild(feFunc);
return feFunc;
};
SVGProLevelsFilter.prototype.getTableValue = function(inputBlack, inputWhite, gamma, outputBlack, outputWhite) {
var cnt = 0;
var segments = 256;
var perc;
var min = Math.min(inputBlack, inputWhite);
var max = Math.max(inputBlack, inputWhite);
var table = Array.call(null,{length:segments});
var colorValue;
var pos = 0;
var outputDelta = outputWhite - outputBlack;
var inputDelta = inputWhite - inputBlack;
while(cnt <= 256) {
perc = cnt/256;
if(perc <= min){
colorValue = inputDelta < 0 ? outputWhite : outputBlack;
} else if(perc >= max){
colorValue = inputDelta < 0 ? outputBlack : outputWhite;
} else {
colorValue = (outputBlack + outputDelta * Math.pow((perc - inputBlack) / inputDelta, 1 / gamma));
}
table[pos++] = colorValue;
cnt += 256/(segments-1);
}
return table.join(' ');
};
SVGProLevelsFilter.prototype.renderFrame = function(forceRender){
if(forceRender || this.filterManager.mdf){
var val, cnt, perc, bezier;
var effectElements = this.filterManager.effectElements;
if(this.feFuncRComposed && (forceRender || effectElements[2].p.mdf || effectElements[3].p.mdf || effectElements[4].p.mdf || effectElements[5].p.mdf || effectElements[6].p.mdf)){
val = this.getTableValue(effectElements[2].p.v,effectElements[3].p.v,effectElements[4].p.v,effectElements[5].p.v,effectElements[6].p.v);
this.feFuncRComposed.setAttribute('tableValues',val);
this.feFuncGComposed.setAttribute('tableValues',val);
this.feFuncBComposed.setAttribute('tableValues',val);
}
if(this.feFuncR && (forceRender || effectElements[9].p.mdf || effectElements[10].p.mdf || effectElements[11].p.mdf || effectElements[12].p.mdf || effectElements[13].p.mdf)){
val = this.getTableValue(effectElements[9].p.v,effectElements[10].p.v,effectElements[11].p.v,effectElements[12].p.v,effectElements[13].p.v);
this.feFuncR.setAttribute('tableValues',val);
}
if(this.feFuncG && (forceRender || effectElements[16].p.mdf || effectElements[17].p.mdf || effectElements[18].p.mdf || effectElements[19].p.mdf || effectElements[20].p.mdf)){
val = this.getTableValue(effectElements[16].p.v,effectElements[17].p.v,effectElements[18].p.v,effectElements[19].p.v,effectElements[20].p.v);
this.feFuncG.setAttribute('tableValues',val);
}
if(this.feFuncB && (forceRender || effectElements[23].p.mdf || effectElements[24].p.mdf || effectElements[25].p.mdf || effectElements[26].p.mdf || effectElements[27].p.mdf)){
val = this.getTableValue(effectElements[23].p.v,effectElements[24].p.v,effectElements[25].p.v,effectElements[26].p.v,effectElements[27].p.v);
this.feFuncB.setAttribute('tableValues',val);
}
if(this.feFuncA && (forceRender || effectElements[30].p.mdf || effectElements[31].p.mdf || effectElements[32].p.mdf || effectElements[33].p.mdf || effectElements[34].p.mdf)){
val = this.getTableValue(effectElements[30].p.v,effectElements[31].p.v,effectElements[32].p.v,effectElements[33].p.v,effectElements[34].p.v);
this.feFuncA.setAttribute('tableValues',val);
}
}
};