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notmasteryet 2012-01-13 18:24:02 -06:00
parent 8af527919a
commit 5b6c06d5c6
1 changed files with 63 additions and 33 deletions
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96
src/stream.js
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@ -835,7 +835,7 @@ var JpegStream = (function JpegStreamClosure() {
return bytesToString(this.bytes);
};
JpegStream.prototype.getChar = function jpegStreamGetChar() {
error('internal error: getChar is not valid on JpegStream');
error('internal error: getChar is not valid on JpegStream');
};
/**
* Checks if the image can be decoded and displayed by the browser without any
@ -873,17 +873,17 @@ var JpegStream = (function JpegStreamClosure() {
* For JPEG 2000's we use a library to decode these images and
* the stream behaves like all the other DecodeStreams.
*/
var JpxStream = (function jpxStream() {
function constructor(bytes, dict) {
var JpxStream = (function JpxStreamClosure() {
function JpxStream(bytes, dict) {
this.dict = dict;
this.bytes = bytes;
DecodeStream.call(this);
}
constructor.prototype = Object.create(DecodeStream.prototype);
JpxStream.prototype = Object.create(DecodeStream.prototype);
constructor.prototype.ensureBuffer = function jpxStreamEnsureBuffer(req) {
JpxStream.prototype.ensureBuffer = function jpxStreamEnsureBuffer(req) {
if (this.bufferLength)
return;
@ -899,45 +899,75 @@ var JpxStream = (function jpxStream() {
var data = new Uint8Array(width * height * componentsCount);
for (var k = 0, kk = jpxImage.tiles.length; k < kk; k++) {
var tile = jpxImage.tiles[k];
var tileWidth = tile[0].width;
var tileHeight = tile[0].height;
var tileLeft = tile[0].left;
var tileTop = tile[0].top;
var tileCompoments = jpxImage.tiles[k];
var tileWidth = tileCompoments[0].width;
var tileHeight = tileCompoments[0].height;
var tileLeft = tileCompoments[0].left;
var tileTop = tileCompoments[0].top;
var data0 = tile[0].items;
var data1 = componentsCount > 1 ? tile[1].items : null;
var data2 = componentsCount > 1 ? tile[2].items : null;
var data3 = componentsCount > 3 ? tile[3].items : null;
var dataPosition, sourcePosition, data0, data1, data2, data3, rowFeed;
switch (componentsCount) {
case 1:
data0 = tileCompoments[0].items;
var dataPosition = (width * tileTop + tileLeft) * componentsCount;
var sourcePosition = 0;
for (var j = 0; j < tileHeight; j++) {
for (var i = 0; i < tileWidth; i++) {
data[dataPosition++] = data0[sourcePosition];
if (componentsCount > 1) {
data[dataPosition++] = data1[sourcePosition];
data[dataPosition++] = data2[sourcePosition];
if (componentsCount > 3)
data[dataPosition++] = data3[sourcePosition];
dataPosition = width * tileTop + tileLeft;
rowFeed = width - tileWidth;
sourcePosition = 0;
for (var j = 0; j < tileHeight; j++) {
for (var i = 0; i < tileWidth; i++)
data[dataPosition++] = data0[sourcePosition++];
dataPosition += rowFeed;
}
sourcePosition++;
}
dataPosition += componentsCount * (width - tileWidth);
break;
case 3:
data0 = tileCompoments[0].items;
data1 = tileCompoments[1].items;
data2 = tileCompoments[2].items;
dataPosition = (width * tileTop + tileLeft) * 3;
rowFeed = (width - tileWidth) * 3;
sourcePosition = 0;
for (var j = 0; j < tileHeight; j++) {
for (var i = 0; i < tileWidth; i++) {
data[dataPosition++] = data0[sourcePosition];
data[dataPosition++] = data1[sourcePosition];
data[dataPosition++] = data2[sourcePosition];
sourcePosition++;
}
dataPosition += rowFeed;
}
break;
case 4:
data0 = tileCompoments[0].items;
data1 = tileCompoments[1].items;
data2 = tileCompoments[2].items;
data3 = tileCompoments[3].items;
dataPosition = (width * tileTop + tileLeft) * 4;
rowFeed = (width - tileWidth) * 4;
sourcePosition = 0;
for (var j = 0; j < tileHeight; j++) {
for (var i = 0; i < tileWidth; i++) {
data[dataPosition++] = data0[sourcePosition];
data[dataPosition++] = data1[sourcePosition];
data[dataPosition++] = data2[sourcePosition];
data[dataPosition++] = data3[sourcePosition];
sourcePosition++;
}
dataPosition += rowFeed;
}
break;
}
}
this.buffer = data;
this.bufferLength = data.length;
};
constructor.prototype.getIR = function jpxStreamGetIR() {
return this.src;
};
constructor.prototype.getChar = function jpxStreamGetChar() {
error('internal error: getChar is not valid on JpxStream');
JpxStream.prototype.getChar = function jpxStreamGetChar() {
error('internal error: getChar is not valid on JpxStream');
};
return constructor;
return JpxStream;
})();
var DecryptStream = (function DecryptStreamClosure() {