mirror of
https://github.com/invoiceninja/invoiceninja.git
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224 lines
6.5 KiB
JavaScript
224 lines
6.5 KiB
JavaScript
/** @preserve
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jsPDF addImage plugin (JPEG only at this time)
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Copyright (c) 2012 https://github.com/siefkenj/
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*/
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/**
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* ====================================================================
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*/
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;(function(jsPDFAPI) {
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'use strict'
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var namespace = 'addImage_'
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// takes a string imgData containing the raw bytes of
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// a jpeg image and returns [width, height]
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// Algorithm from: http://www.64lines.com/jpeg-width-height
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var getJpegSize = function(imgData) {
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'use strict'
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var width, height;
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// Verify we have a valid jpeg header 0xff,0xd8,0xff,0xe0,?,?,'J','F','I','F',0x00
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if (!imgData.charCodeAt(0) === 0xff ||
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!imgData.charCodeAt(1) === 0xd8 ||
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!imgData.charCodeAt(2) === 0xff ||
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!imgData.charCodeAt(3) === 0xe0 ||
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!imgData.charCodeAt(6) === 'J'.charCodeAt(0) ||
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!imgData.charCodeAt(7) === 'F'.charCodeAt(0) ||
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!imgData.charCodeAt(8) === 'I'.charCodeAt(0) ||
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!imgData.charCodeAt(9) === 'F'.charCodeAt(0) ||
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!imgData.charCodeAt(10) === 0x00) {
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throw new Error('getJpegSize requires a binary jpeg file')
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}
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var blockLength = imgData.charCodeAt(4)*256 + imgData.charCodeAt(5);
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var i = 4, len = imgData.length;
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while ( i < len ) {
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i += blockLength;
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if (imgData.charCodeAt(i) !== 0xff) {
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throw new Error('getJpegSize could not find the size of the image');
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}
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if (imgData.charCodeAt(i+1) === 0xc0) {
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height = imgData.charCodeAt(i+5)*256 + imgData.charCodeAt(i+6);
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width = imgData.charCodeAt(i+7)*256 + imgData.charCodeAt(i+8);
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return [width, height];
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} else {
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i += 2;
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blockLength = imgData.charCodeAt(i)*256 + imgData.charCodeAt(i+1)
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}
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}
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}
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// Image functionality ported from pdf.js
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, putImage = function(img) {
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var objectNumber = this.internal.newObject()
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, out = this.internal.write
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, putStream = this.internal.putStream
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img['n'] = objectNumber
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out('<</Type /XObject')
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out('/Subtype /Image')
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out('/Width ' + img['w'])
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out('/Height ' + img['h'])
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if (img['cs'] === 'Indexed') {
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out('/ColorSpace [/Indexed /DeviceRGB '
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+ (img['pal'].length / 3 - 1) + ' ' + (objectNumber + 1)
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+ ' 0 R]');
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} else {
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out('/ColorSpace /' + img['cs']);
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if (img['cs'] === 'DeviceCMYK') {
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out('/Decode [1 0 1 0 1 0 1 0]');
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}
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}
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out('/BitsPerComponent ' + img['bpc']);
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if ('f' in img) {
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out('/Filter /' + img['f']);
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}
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if ('dp' in img) {
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out('/DecodeParms <<' + img['dp'] + '>>');
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}
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if ('trns' in img && img['trns'].constructor == Array) {
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var trns = '';
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for ( var i = 0; i < img['trns'].length; i++) {
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trns += (img[trns][i] + ' ' + img['trns'][i] + ' ');
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out('/Mask [' + trns + ']');
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}
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}
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if ('smask' in img) {
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out('/SMask ' + (objectNumber + 1) + ' 0 R');
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}
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out('/Length ' + img['data'].length + '>>');
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putStream(img['data']);
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out('endobj');
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}
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, putResourcesCallback = function() {
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var images = this.internal.collections[namespace + 'images']
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for ( var i in images ) {
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putImage.call(this, images[i])
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}
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}
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, putXObjectsDictCallback = function(){
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var images = this.internal.collections[namespace + 'images']
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, out = this.internal.write
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, image
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for (var i in images) {
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image = images[i]
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out(
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'/I' + image['i']
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, image['n']
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, '0'
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, 'R'
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)
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}
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}
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jsPDFAPI.addImage = function(imageData, format, x, y, w, h) {
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'use strict'
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if (typeof imageData === 'object' && imageData.nodeType === 1) {
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var canvas = document.createElement('canvas');
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canvas.width = imageData.clientWidth;
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canvas.height = imageData.clientHeight;
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var ctx = canvas.getContext('2d');
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if (!ctx) {
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throw ('addImage requires canvas to be supported by browser.');
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}
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ctx.drawImage(imageData, 0, 0, canvas.width, canvas.height);
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imageData = canvas.toDataURL('image/jpeg');
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format = "JPEG";
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}
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if (format.toUpperCase() !== 'JPEG') {
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throw new Error('addImage currently only supports format \'JPEG\', not \''+format+'\'');
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}
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var imageIndex
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, images = this.internal.collections[namespace + 'images']
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, coord = this.internal.getCoordinateString
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, vcoord = this.internal.getVerticalCoordinateString;
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// Detect if the imageData is raw binary or Data URL
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if (imageData.substring(0, 23) === 'data:image/jpeg;base64,') {
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imageData = atob(imageData.replace('data:image/jpeg;base64,', ''));
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}
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if (images){
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// this is NOT the first time this method is ran on this instance of jsPDF object.
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imageIndex = Object.keys ?
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Object.keys(images).length :
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(function(o){
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var i = 0
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for (var e in o){if(o.hasOwnProperty(e)){ i++ }}
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return i
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})(images)
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} else {
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// this is the first time this method is ran on this instance of jsPDF object.
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imageIndex = 0
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this.internal.collections[namespace + 'images'] = images = {}
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this.internal.events.subscribe('putResources', putResourcesCallback)
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this.internal.events.subscribe('putXobjectDict', putXObjectsDictCallback)
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}
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var dims = getJpegSize(imageData);
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var info = {
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w : dims[0],
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h : dims[1],
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cs : 'DeviceRGB',
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bpc : 8,
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f : 'DCTDecode',
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i : imageIndex,
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data : imageData
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// n: objectNumber will be added by putImage code
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};
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images[imageIndex] = info
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if (!w && !h) {
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w = -96;
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h = -96;
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}
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if (w < 0) {
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w = (-1) * info['w'] * 72 / w / this.internal.scaleFactor;
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}
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if (h < 0) {
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h = (-1) * info['h'] * 72 / h / this.internal.scaleFactor;
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}
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if (w === 0) {
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w = h * info['w'] / info['h'];
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}
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if (h === 0) {
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h = w * info['h'] / info['w'];
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}
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this.internal.write(
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'q'
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, coord(w)
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, '0 0'
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, coord(h) // TODO: check if this should be shifted by vcoord
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, coord(x)
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, vcoord(y + h)
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, 'cm /I'+info['i']
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, 'Do Q'
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)
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return this
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}
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})(jsPDF.API)
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