Sakurai/pdf.js
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Replace ImageCanvas by ScratchCanvas

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This commit is contained in:
Julian Viereck 2011-06-22 20:16:04 +02:00
parent b17bf4b20e
commit c9c24ee5c3
1 changed files with 15 additions and 24 deletions
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35
pdf.js
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@ -2269,21 +2269,18 @@ var Encodings = {
}
};
function ImageCanvas(width, height) {
var tmpCanvas = this.canvas = document.createElement("canvas");
tmpCanvas.width = width;
tmpCanvas.height = height;
function ScratchCanvas(width, height) {
var canvas = document.createElement("canvas");
canvas.width = width;
canvas.height = height;
this.ctx = tmpCanvas.getContext("2d");
this.imgData = this.ctx.getImageData(0, 0, width, height);
this.getContext = function(kind) {
return canvas.getContext(kind);
}
ImageCanvas.prototype.putImageData = function(imgData) {
this.ctx.putImageData(imgData, 0, 0);
this.getCanvas = function() {
return canvas;
}
ImageCanvas.prototype.getCanvas = function() {
return this.canvas;
}
var CanvasGraphics = (function() {
@ -2294,7 +2291,7 @@ var CanvasGraphics = (function() {
this.pendingClip = null;
this.res = null;
this.xobjs = null;
this.ImageCanvas = imageCanvas || ImageCanvas;
this.ScratchCanvas = imageCanvas || ScratchCanvas;
}
constructor.prototype = {
@ -3348,15 +3345,9 @@ var CanvasGraphics = (function() {
// handle matte object
}
var tmpCanvas = new this.ImageCanvas(w, h);
// var tmpCanvas = document.createElement("canvas");
// tmpCanvas.width = w;
// tmpCanvas.height = h;
//
// var tmpCtx = tmpCanvas.getContext("2d");
// var imgData = tmpCtx.getImageData(0, 0, w, h);
// var pixels = imgData.data;
var imgData = tmpCanvas.imgData;
var tmpCanvas = new this.ScratchCanvas(w, h);
var tmpCtx = tmpCanvas.getContext("2d");
var imgData = tmpCtx.getImageData(0, 0, w, h);
var pixels = imgData.data;
if (bitsPerComponent != 8)
@ -3423,7 +3414,7 @@ var CanvasGraphics = (function() {
TODO("Images with "+ numComps + " components per pixel");
}
}
tmpCanvas.putImageData(imgData, 0, 0);
tmpCtx.putImageData(imgData, 0, 0);
ctx.drawImage(tmpCanvas.getCanvas(), 0, -h);
this.restore();
},