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Removes getImageData from canvas.js

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This commit is contained in:
Yury Delendik 2013-05-30 19:42:26 -05:00
parent 297266f1d6
commit 339dc65082
4 changed files with 134 additions and 209 deletions
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48
src/image.js
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@ -206,6 +206,30 @@ var PDFImage = (function PDFImageClosure() {
return temp;
};
PDFImage.createMask = function PDFImage_createMask(imgArray, width, height,
inverseDecode) {
var buffer = new Uint8Array(width * height * 4);
var imgArrayPos = 0;
var i, j, mask, buf;
// removing making non-masked pixels transparent
var bufferPos = 3; // alpha component offset
for (i = 0; i < height; i++) {
mask = 0;
for (j = 0; j < width; j++) {
if (!mask) {
buf = imgArray[imgArrayPos++];
mask = 128;
}
if (!(buf & mask) !== inverseDecode) {
buffer[bufferPos] = 255;
}
bufferPos += 4;
mask >>= 1;
}
}
return {data: buffer, width: width, height: height};
};
PDFImage.prototype = {
get drawWidth() {
if (!this.smask)
@ -362,30 +386,6 @@ var PDFImage = (function PDFImageClosure() {
}
return buf;
},
applyStencilMask: function PDFImage_applyStencilMask(buffer,
inverseDecode) {
var width = this.width, height = this.height;
var bitStrideLength = (width + 7) >> 3;
var imgArray = this.getImageBytes(bitStrideLength * height);
var imgArrayPos = 0;
var i, j, mask, buf;
// removing making non-masked pixels transparent
var bufferPos = 3; // alpha component offset
for (i = 0; i < height; i++) {
mask = 0;
for (j = 0; j < width; j++) {
if (!mask) {
buf = imgArray[imgArrayPos++];
mask = 128;
}
if (!(buf & mask) === inverseDecode) {
buffer[bufferPos] = 0;
}
bufferPos += 4;
mask >>= 1;
}
}
},
fillRgbaBuffer: function PDFImage_fillRgbaBuffer(buffer, width, height) {
var numComps = this.numComps;
var originalWidth = this.width;