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Add JpegStreamProxy - doesnt seem to be used anywhere in the example.pdf file

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This commit is contained in:
Julian Viereck 2011-06-22 14:02:54 +02:00
parent ddd8aeffb9
commit 04cec20384
3 changed files with 64 additions and 8 deletions
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44
canvas_proxy.js
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@ -19,6 +19,38 @@ ImageCanvasProxy.prototype.getCanvas = function() {
return this;
}
var JpegStreamProxyCounter = 0;
// WebWorker Proxy for JpegStream.
var JpegStreamProxy = (function() {
function constructor(bytes, dict) {
this.id = JpegStreamProxyCounter++;
this.dict = dict;
// create DOM image.
postMessage("jpeg_stream");
postMessage({
id: this.id,
str: bytesToString(bytes)
});
// var img = new Image();
// img.src = "data:image/jpeg;base64," + window.btoa(bytesToString(bytes));
// this.domImage = img;
}
constructor.prototype = {
getImage: function() {
return this;
// return this.domImage;
},
getChar: function() {
error("internal error: getChar is not valid on JpegStream");
}
};
return constructor;
})();
function CanvasProxy(width, height) {
var stack = this.$stack = [];
@ -72,9 +104,11 @@ function CanvasProxy(width, height) {
"$showText"
];
this.drawImage = function(canvas, x, y) {
if (canvas instanceof ImageCanvasProxy) {
stack.push(["$drawCanvas", [canvas.imgData, x, y, canvas.width, canvas.height]]);
this.drawImage = function(image, x, y, width, height, sx, sy, swidth, sheight) {
if (image instanceof ImageCanvasProxy) {
stack.push(["$drawCanvas", [image.imgData, x, y, image.width, image.height]]);
} else if(image instanceof JpegStreamProxy) {
stack.push(["$drawImage", [image.id, x, y, sx, sy, swidth, sheight]])
} else {
throw "unkown type to drawImage";
}
@ -139,9 +173,7 @@ function CanvasProxy(width, height) {
}
CanvasProxy.prototype.flush = function() {
// postMessage("log");
// postMessage(JSON.stringify([this.$stack.length]));
postMessage("canvas_proxy_stack");
postMessage(JSON.stringify(this.$stack));
postMessage(this.$stack);
this.$stack.length = 0;
}