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PngExportController.js
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PngExportController.js
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(function () {
var ns = $.namespace('pskl.controller.settings.exportimage');
var dimensionInfoPattern = '{{width}} x {{height}} px, {{frames}}<br/>{{columns}}, {{rows}}.';
var replace = pskl.utils.Template.replace;
// Helper to return "X items" or "1 item" if X is 1.
var pluralize = function (word, count) {
if (count === 1) {
return '1 ' + word;
}
return count + ' ' + word + 's';
};
ns.PngExportController = function (piskelController, exportController) {
this.piskelController = piskelController;
this.exportController = exportController;
this.onScaleChanged_ = this.onScaleChanged_.bind(this);
};
pskl.utils.inherit(ns.PngExportController, pskl.controller.settings.AbstractSettingController);
ns.PngExportController.prototype.init = function () {
this.layoutContainer = document.querySelector('.png-export-layout-section');
this.dimensionInfo = document.querySelector('.png-export-dimension-info');
this.rowsInput = document.querySelector('#png-export-rows');
this.columnsInput = document.querySelector('#png-export-columns');
var downloadButton = document.querySelector('.png-download-button');
var downloadPixiButton = document.querySelector('.png-pixi-download-button');
var dataUriButton = document.querySelector('.datauri-open-button');
this.initLayoutSection_();
this.updateDimensionLabel_();
this.addEventListener(this.columnsInput, 'input', this.onColumnsInput_);
this.addEventListener(downloadButton, 'click', this.onDownloadClick_);
this.addEventListener(downloadPixiButton, 'click', this.onPixiDownloadClick_);
this.addEventListener(dataUriButton, 'click', this.onDataUriClick_);
$.subscribe(Events.EXPORT_SCALE_CHANGED, this.onScaleChanged_);
};
ns.PngExportController.prototype.destroy = function () {
$.unsubscribe(Events.EXPORT_SCALE_CHANGED, this.onScaleChanged_);
this.superclass.destroy.call(this);
};
/**
* Initalize all controls related to the spritesheet layout.
*/
ns.PngExportController.prototype.initLayoutSection_ = function () {
var frames = this.piskelController.getFrameCount();
if (frames === 1) {
// Hide the layout section if only one frame is defined.
this.layoutContainer.style.display = 'none';
} else {
this.columnsInput.setAttribute('max', frames);
this.columnsInput.value = this.getBestFit_();
this.onColumnsInput_();
}
};
ns.PngExportController.prototype.updateDimensionLabel_ = function () {
var zoom = this.exportController.getExportZoom();
var frames = this.piskelController.getFrameCount();
var width = this.piskelController.getWidth() * zoom;
var height = this.piskelController.getHeight() * zoom;
var columns = this.getColumns_();
var rows = this.getRows_();
width = columns * width;
height = rows * height;
this.dimensionInfo.innerHTML = replace(dimensionInfoPattern, {
width: width,
height: height,
rows: pluralize('row', rows),
columns: pluralize('column', columns),
frames: pluralize('frame', frames),
});
};
ns.PngExportController.prototype.getColumns_ = function () {
return parseInt(this.columnsInput.value || 1, 10);
};
ns.PngExportController.prototype.getRows_ = function () {
return parseInt(this.rowsInput.value || 1, 10);
};
ns.PngExportController.prototype.getBestFit_ = function () {
var ratio = this.piskelController.getWidth() / this.piskelController.getHeight();
var frameCount = this.piskelController.getFrameCount();
var bestFit = Math.round(Math.sqrt(frameCount / ratio));
return pskl.utils.Math.minmax(bestFit, 1, frameCount);
};
ns.PngExportController.prototype.onScaleChanged_ = function () {
this.updateDimensionLabel_();
};
/**
* Synchronise column and row inputs, called everytime a user input updates one of the
* two inputs by the SynchronizedInputs widget.
*/
ns.PngExportController.prototype.onColumnsInput_ = function () {
var value = this.columnsInput.value;
if (value === '') {
// Skip the synchronization if the input is empty.
return;
}
value = parseInt(value, 10);
if (isNaN(value)) {
value = 1;
}
// Force the value to be in bounds, if the user tried to update it by directly typing
// a value.
value = pskl.utils.Math.minmax(value, 1, this.piskelController.getFrameCount());
this.columnsInput.value = value;
// Update readonly rowsInput
this.rowsInput.value = Math.ceil(this.piskelController.getFrameCount() / value);
this.updateDimensionLabel_();
};
ns.PngExportController.prototype.createPngSpritesheet_ = function () {
var renderer = new pskl.rendering.PiskelRenderer(this.piskelController);
var outputCanvas = renderer.renderAsCanvas(this.getColumns_(), this.getRows_());
var width = outputCanvas.width;
var height = outputCanvas.height;
var zoom = this.exportController.getExportZoom();
if (zoom != 1) {
outputCanvas = pskl.utils.ImageResizer.resize(outputCanvas, width * zoom, height * zoom, false);
}
return outputCanvas;
};
ns.PngExportController.prototype.onDownloadClick_ = function (evt) {
// Create PNG export.
var canvas = this.createPngSpritesheet_();
this.downloadCanvas_(canvas);
};
// Used and overridden in casper integration tests.
ns.PngExportController.prototype.downloadCanvas_ = function (canvas) {
// Generate file name
var name = this.piskelController.getPiskel().getDescriptor().name;
var fileName = name + '.png';
// Transform to blob and start download.
pskl.utils.BlobUtils.canvasToBlob(canvas, function(blob) {
pskl.utils.FileUtils.downloadAsFile(blob, fileName);
});
};
ns.PngExportController.prototype.onPixiDownloadClick_ = function () {
var zip = new window.JSZip();
// Create PNG export.
var canvas = this.createPngSpritesheet_();
var name = this.piskelController.getPiskel().getDescriptor().name;
zip.file(name + '.png', pskl.utils.CanvasUtils.getBase64FromCanvas(canvas) + '\n', {base64: true});
var width = canvas.width / this.getColumns_();
var height = canvas.height / this.getRows_();
var numFrames = this.piskelController.getFrameCount();
var frames = {};
for (var i = 0; i < numFrames; i++) {
var column = i % this.getColumns_();
var row = (i - column) / this.getColumns_();
var frame = {
'frame': {'x': width * column,'y': height * row,'w': width,'h': height},
'rotated': false,
'trimmed': false,
'spriteSourceSize': {'x': 0,'y': 0,'w': width,'h': height},
'sourceSize': {'w': width,'h': height}
};
frames[name + i + '.png'] = frame;
}
var json = {
'frames': frames,
'meta': {
'app': 'https://github.com/piskelapp/piskel/',
'version': '1.0',
'image': name + '.png',
'format': 'RGBA8888',
'size': {'w': canvas.width,'h': canvas.height}
}
};
zip.file(name + '.json', JSON.stringify(json));
var blob = zip.generate({
type : 'blob'
});
pskl.utils.FileUtils.downloadAsFile(blob, name + '.zip');
};
ns.PngExportController.prototype.onDataUriClick_ = function (evt) {
var popup = window.open('about:blank');
var dataUri = this.createPngSpritesheet_().toDataURL('image/png');
window.setTimeout(function () {
var html = pskl.utils.Template.getAndReplace('data-uri-export-partial', {
src: dataUri
});
popup.document.title = dataUri;
popup.document.body.innerHTML = html;
}.bind(this), 500);
};
})();