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Code Issues Projects Releases Wiki Activity

Dynamic DPIs !

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This commit is contained in:
Vince
2012-09-08 16:32:28 +02:00
parent bca16a3964
commit ba5500b4b0
4 changed files with 60 additions and 31 deletions
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29
js/rendering/FrameRenderer.js
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@ -17,24 +17,30 @@
this.displayGrid = !!renderingOptions.displayGrid;
this.dpi = renderingOptions.dpi;
this.className = className;
// Flag to know if the config was altered
this.canvasConfigDirty = true;
};
ns.FrameRenderer.prototype.init = function (frame) {
this.createCanvas_(frame);
this.render(frame);
};
ns.FrameRenderer.prototype.updateDPI = function (newDPI) {
this.dpi = newDPI;
this.canvasConfigDirty = true;
};
ns.FrameRenderer.prototype.render = function (frame) {
for(var col = 0, width = frame.getWidth(); col < width; col++) {
for(var row = 0, height = frame.getHeight(); row < height; row++) {
this.drawPixel(col, row, frame, this.canvas, this.dpi);
this.drawPixel(col, row, frame, this.getCanvas_(frame), this.dpi);
}
}
};
ns.FrameRenderer.prototype.drawPixel = function (col, row, frame) {
var context = this.canvas.getContext('2d');
var context = this.getCanvas_(frame).getContext('2d');
var color = frame.getPixel(col, row);
if(color == Constants.TRANSPARENT_COLOR) {
context.clearRect(col * this.dpi, row * this.dpi, this.dpi, this.dpi);
@ -50,17 +56,19 @@
};
ns.FrameRenderer.prototype.clear = function (col, row, frame) {
this.canvas.getContext("2d").clearRect(0, 0, this.canvas.width, this.canvas.height);
var canvas = this.getCanvas_(frame)
canvas.getContext("2d").clearRect(0, 0, canvas.width, canvas.height);
};
/**
* @private
*/
ns.FrameRenderer.prototype.createCanvas_ = function (frame) {
if(this.canvas == undefined) {
ns.FrameRenderer.prototype.getCanvas_ = function (frame) {
if(this.canvasConfigDirty) {
$(this.canvas).remove();
var width = frame.getWidth(),
height = frame.getHeight();
var canvas = document.createElement("canvas");
canvas.setAttribute("width", width * this.dpi);
canvas.setAttribute("height", height * this.dpi);
@ -72,7 +80,10 @@
canvas.setAttribute("class", canvasClassname);
this.canvas = canvas;
this.container.appendChild(this.canvas);
this.canvasConfigDirty = false;
}
this.container.appendChild(this.canvas);
return this.canvas;
};
})();