Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #4889 from CodingFabian/optimize-jpg-loops

Browse Source 
Optimized loops in JPG conversion.
This commit is contained in:
Yury Delendik 2014-06-04 15:34:48 -05:00
commit 43a103d5d3
1 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/core/jpg.js
View File

@ -870,7 +870,7 @@ var JpegImage = (function jpegImage() {
_convertYccToRgb: function convertYccToRgb(data) { _convertYccToRgb: function convertYccToRgb(data) {
var Y, Cb, Cr; var Y, Cb, Cr;
for (var i = 0; i < data.length; i += this.numComponents) { for (var i = 0, length = data.length; i < length; i += 3) {
Y = data[i ]; Y = data[i ];
Cb = data[i + 1]; Cb = data[i + 1];
Cr = data[i + 2]; Cr = data[i + 2];
@ -884,7 +884,7 @@ var JpegImage = (function jpegImage() {
_convertYcckToRgb: function convertYcckToRgb(data) { _convertYcckToRgb: function convertYcckToRgb(data) {
var Y, Cb, Cr, k, CbCb, CbCr, CbY, Cbk, CrCr, Crk, CrY, YY, Yk, kk; var Y, Cb, Cr, k, CbCb, CbCr, CbY, Cbk, CrCr, Crk, CrY, YY, Yk, kk;
var offset = 0; var offset = 0;
for (var i = 0; i < data.length; i += this.numComponents) { for (var i = 0, length = data.length; i < length; i += 4) {
Y = data[i]; Y = data[i];
Cb = data[i + 1]; Cb = data[i + 1];
Cr = data[i + 2]; Cr = data[i + 2];
@ -937,7 +937,7 @@ var JpegImage = (function jpegImage() {
_convertYcckToCmyk: function convertYcckToCmyk(data) { _convertYcckToCmyk: function convertYcckToCmyk(data) {
var Y, Cb, Cr; var Y, Cb, Cr;
for (var i = 0; i < data.length; i += this.numComponents) { for (var i = 0, length = data.length; i < length; i += 4) {
Y = data[i]; Y = data[i];
Cb = data[i + 1]; Cb = data[i + 1];
Cr = data[i + 2]; Cr = data[i + 2];
@ -952,14 +952,13 @@ var JpegImage = (function jpegImage() {
_convertCmykToRgb: function convertCmykToRgb(data) { _convertCmykToRgb: function convertCmykToRgb(data) {
var c, m, y, k; var c, m, y, k;
var offset = 0; var offset = 0;
var length = data.length;
var min = -255 * 255 * 255; var min = -255 * 255 * 255;
var scale = 1 / 255 / 255; var scale = 1 / 255 / 255;
for (var i = 0; i < length;) { for (var i = 0, length = data.length; i < length; i += 4) {
c = data[i++]; c = data[i];
m = data[i++]; m = data[i + 1];
y = data[i++]; y = data[i + 2];
k = data[i++]; k = data[i + 3];
var r = var r =
c * (-4.387332384609988 * c + 54.48615194189176 * m + c * (-4.387332384609988 * c + 54.48615194189176 * m +