75 lines
1.8 KiB
JavaScript
75 lines
1.8 KiB
JavaScript
// računa vrednosti za transform-scale (x, y)
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// transform: scale(x,y) se uporablja za raztegovanje videa, ne pa za približevanje
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// calculates values for transform scale(x, y)
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// transform: scale(x,y) is used for stretching, not zooming.
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class Stretcher {
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// internal variables
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// functions
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constructor(videoData) {
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this.conf = videoData;
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}
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applyConditionalStretch(stretchFactors, actualAr){
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// samo razširjamo, nikoli krčimo
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// only stretch, no shrink
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var x, y;
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x = videoDimensions.width / videoDimensions.actualWidth;
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y = videoDimensions.height / videoDimensions.actualHeight;
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var dmax = 1 + maxDifferencePercent;
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if(x < 1 || x > dmax){
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x = 1;
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}
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if(y < 1 || y > dmax){
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y = 1;
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}
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return {
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x: x,
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y: y
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}
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}
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calculateStretch(actualAr) {
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// naj ponovim: samo razširjamo, nikoli krčimo
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// let me reiterate: only stretch, no shrink
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var playerAr = this.conf.player.dimensions.width / this.conf.player.dimensions.height;
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var videoAr = this.conf.video.videoWidth / this.conf.video.videoHeight;
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if (! actualAr){
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actualAr = playerAr;
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}
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var stretchFactors = {
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xFactor: 1,
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yFactor: 1
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};
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if (actualAr > videoAr) {
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if(videoAr > playerAr) {
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stretchFactors.xFactor = playerAr / videoAr;
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stretchFactors.yFactor = actualAr / videoAr;
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} else {
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stretchFactors.xFactor = 1;
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stretchFactors.yFactor = actualAr / videoAr;
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}
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} else {
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if (videoAr > playerAr) {
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stretchFactors.xFactor = videoAr / actualAr;
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stretchFactors.yFactor = playerAr / actualAr;
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} else {
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stretchFactors.xFactor = playerAr / actualAr;
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stretchFactors.yFactor = 1;
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}
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}
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return stretchFactors;
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}
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} |