63 lines
No EOL
2.1 KiB
JavaScript
63 lines
No EOL
2.1 KiB
JavaScript
(function () {
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var ns = $.namespace("pskl.rendering");
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ns.SpritesheetRenderer = function (framesheet) {
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this.framesheet = framesheet;
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};
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ns.SpritesheetRenderer.prototype.renderAsImageDataSpritesheetPNG = function () {
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var canvas = this.createCanvas_();
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for (var i = 0 ; i < this.framesheet.getFrameCount() ; i++) {
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var frame = this.framesheet.getFrameByIndex(i);
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this.drawFrameInCanvas_(frame, canvas, i * this.framesheet.getWidth(), 0);
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}
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return canvas.toDataURL("image/png");
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};
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ns.SpritesheetRenderer.prototype.renderAsImageDataAnimatedGIF = function (fps) {
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var encoder = new GIFEncoder(), dpi = 10;
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encoder.setRepeat(0);
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encoder.setDelay(1000/fps);
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encoder.start();
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encoder.setSize(this.framesheet.getWidth() * dpi, this.framesheet.getHeight() * dpi);
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for (var i = 0 ; i < this.framesheet.frames.length ; i++) {
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var frame = this.framesheet.frames[i];
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var renderer = new pskl.rendering.CanvasRenderer(frame, dpi);
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encoder.addFrame(renderer.render());
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}
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encoder.finish();
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var imageData = 'data:image/gif;base64,' + encode64(encoder.stream().getData());
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return imageData;
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};
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/**
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* TODO(juliandescottes): Mutualize with code already present in FrameRenderer
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*/
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ns.SpritesheetRenderer.prototype.drawFrameInCanvas_ = function (frame, canvas, offsetWidth, offsetHeight) {
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var context = canvas.getContext('2d');
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for(var col = 0, width = frame.getWidth(); col < width; col++) {
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for(var row = 0, height = frame.getHeight(); row < height; row++) {
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var color = frame.getPixel(col, row);
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if(color != Constants.TRANSPARENT_COLOR) {
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context.fillStyle = color;
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context.fillRect(col + offsetWidth, row + offsetHeight, 1, 1);
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}
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}
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}
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};
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ns.SpritesheetRenderer.prototype.createCanvas_ = function () {
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var frameCount = this.framesheet.getFrameCount();
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if (frameCount > 0){
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var width = frameCount * this.framesheet.getWidth();
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var height = this.framesheet.getHeight();
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return pskl.CanvasUtils.createCanvas(width, height);
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} else {
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throw "Cannot render empty Spritesheet";
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}
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};
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})(); |