Sakurai/pdf.js
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draws a broken image

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sbarman 2011-06-24 10:24:31 -07:00
parent 1ea51ed62d
commit 383bc110cc
1 changed files with 34 additions and 23 deletions
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pdf.js
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@ -4,7 +4,7 @@
"use strict"; "use strict";
var ERRORS = 0, WARNINGS = 1, TODOS = 5; var ERRORS = 0, WARNINGS = 1, TODOS = 5;
var verbosity = WARNINGS; var verbosity = ERRORS;
function log(msg) { function log(msg) {
if (console && console.log) if (console && console.log)
@ -889,7 +889,7 @@ var CCITTFaxStream = (function() {
const twoDimVertR3 = 7; const twoDimVertR3 = 7;
const twoDimVertL3 = 8; const twoDimVertL3 = 8;
const twoDimTable1 = [ const twoDimTable = [
[-1, -1], [-1, -1], // 000000x [-1, -1], [-1, -1], // 000000x
[7, twoDimVertL3], // 0000010 [7, twoDimVertL3], // 0000010
[7, twoDimVertR3], // 0000011 [7, twoDimVertR3], // 0000011
@ -1304,33 +1304,34 @@ var CCITTFaxStream = (function() {
[2, 2], [2, 2], [2, 2], [2, 2] [2, 2], [2, 2], [2, 2], [2, 2]
]; ];
function constructor(str) { function constructor(str, params) {
this.str = str; this.str = str;
var dict = str.dict; this.dict = str.dict;
this.dict = dict;
this.encoding = dict.get("K") || 0; params = params || new Dict();
this.eoline = dict.get("EndOfLine") || false;
this.byteAlign = dict.get("EncodedByteAlign") || false; this.encoding = params.get("K") || 0;
this.columns = dict.get("Columns") || 1728; this.eoline = params.get("EndOfLine") || false;
this.rows = dict.get("Rows") || 0; this.byteAlign = params.get("EncodedByteAlign") || false;
var eoblock = dict.get("EndOfBlock"); this.columns = params.get("Columns") || 1728;
this.rows = params.get("Rows") || 0;
var eoblock = params.get("EndOfBlock");
if (typeof eoblock == "undefined") if (typeof eoblock == "undefined")
eoblock = true; eoblock = true;
this.black = dict.get("BlackIs1") || false; this.eoblock = eoblock;
this.black = params.get("BlackIs1") || false;
this.codingLine = new Uint8Array(this.columns + 1); this.codingLine = new Uint32Array(this.columns + 1);
this.codingLine[0] = this.columns; this.codingLine[0] = this.columns;
this.codingPos = 0; this.codingPos = 0;
this.refLine = new Uint8Array(this.columns + 2); this.refLine = new Uint32Array(this.columns + 2);
this.row = 0; this.row = 0;
this.nextLine2D = this.encoding < 0; this.nextLine2D = this.encoding < 0;
this.inputBits = 0; this.inputBits = 0;
this.inputBuf; this.inputBuf;
this.outputBits = 0; this.outputBits = 0;
this.buf = EOF; this.buf = EOF;
this.err = false;
var code1; var code1;
while ((code1 = this.lookBits(12)) == 0) { while ((code1 = this.lookBits(12)) == 0) {
@ -1352,10 +1353,8 @@ var CCITTFaxStream = (function() {
while (!this.eof) { while (!this.eof) {
var c = this.lookChar(); var c = this.lookChar();
this.buf = EOF; this.buf = EOF;
if (this.bufferLength <= this.pos) this.ensureBuffer(this.bufferLength + 1);
this.ensureBuffer(this.pos + 1); this.buffer[this.bufferLength++] = c;
this.buffer[this.pos++] = c;
} }
}; };
constructor.prototype.addPixels = function(a1, blackPixels) { constructor.prototype.addPixels = function(a1, blackPixels) {
@ -1419,6 +1418,8 @@ var CCITTFaxStream = (function() {
if (this.eof) if (this.eof)
return; return;
this.err = false;
if (this.nextLine2D) { if (this.nextLine2D) {
for (var i = 0; codingLine[i] < columns; ++i) for (var i = 0; codingLine[i] < columns; ++i)
refLine[i] = codingLine[i]; refLine[i] = codingLine[i];
@ -1431,7 +1432,7 @@ var CCITTFaxStream = (function() {
blackPixels = 0; blackPixels = 0;
while (codingLine[this.codingPos] < columns) { while (codingLine[this.codingPos] < columns) {
var code1 = this.getTwoDumCode(); var code1 = this.getTwoDimCode();
switch (code1) { switch (code1) {
case twoDimPass: case twoDimPass:
this.addPixels(refLine[refPos + 1], blackPixels); this.addPixels(refLine[refPos + 1], blackPixels);
@ -1530,7 +1531,7 @@ var CCITTFaxStream = (function() {
else else
++refPos; ++refPos;
while (refLine[refPos] <= codingLine[this.codingPos] && while (refLine[refPos] <= codingLine[this.codingPos] &&
refLine[redPos] < columns) refLine[refPos] < columns)
refPos += 2; refPos += 2;
} }
break; break;
@ -2466,7 +2467,7 @@ var Parser = (function() {
return new Ascii85Stream(stream); return new Ascii85Stream(stream);
} else if (name == "CCITTFaxDecode") { } else if (name == "CCITTFaxDecode") {
TODO("implement fax stream"); TODO("implement fax stream");
return new CCITTFaxStream(stream); return new CCITTFaxStream(stream, params);
} else { } else {
error("filter '" + name + "' not supported yet"); error("filter '" + name + "' not supported yet");
} }
@ -4272,12 +4273,14 @@ var CanvasGraphics = (function() {
tmpCanvas.width = w; tmpCanvas.width = w;
tmpCanvas.height = h; tmpCanvas.height = h;
var tmpCtx = tmpCanvas.getContext("2d"); var tmpCtx = tmpCanvas.getContext("2d");
tmpCtx.fillStyle = "#000";
tmpCtx.fillRect(0, 0, w, h);
var imgData = tmpCtx.getImageData(0, 0, w, h); var imgData = tmpCtx.getImageData(0, 0, w, h);
var pixels = imgData.data; var pixels = imgData.data;
var mask = 128; var mask = 128;
var b = 0; var b = 0;
for (var i = 0; i < length; i += 4) { for (var i = 0, length = imgArray.length*8*4; i < length; i += 4) {
mask <<= 1; mask <<= 1;
if (mask >= 256) { if (mask >= 256) {
b = imgArray[imgIdx++]; b = imgArray[imgIdx++];
@ -4285,11 +4288,19 @@ var CanvasGraphics = (function() {
} }
var p = b & mask; var p = b & mask;
if (p > 0)
p = 1;
else
p = 0;
pixels[i] = 255 * p; pixels[i] = 255 * p;
pixels[i+1] = 255 * p; pixels[i+1] = 255 * p;
pixels[i+2] = 255 * p; pixels[i+2] = 255 * p;
pixels[i+3] = 255; pixels[i+3] = 255;
} }
tmpCtx.putImageData(imgData, 0, 0);
ctx.drawImage(tmpCanvas, 0, -h);
this.restore();
return; return;
} }