diff --git a/src/core/ccitt_stream.js b/src/core/ccitt_stream.js
new file mode 100644
index 000000000..237f26523
--- /dev/null
+++ b/src/core/ccitt_stream.js
@@ -0,0 +1,1016 @@
+/* Copyright 2012 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Dict, isDict } from './primitives';
+import { DecodeStream } from './stream';
+import { info } from '../shared/util';
+
+var CCITTFaxStream = (function CCITTFaxStreamClosure() {
+
+ var ccittEOL = -2;
+ var ccittEOF = -1;
+ var twoDimPass = 0;
+ var twoDimHoriz = 1;
+ var twoDimVert0 = 2;
+ var twoDimVertR1 = 3;
+ var twoDimVertL1 = 4;
+ var twoDimVertR2 = 5;
+ var twoDimVertL2 = 6;
+ var twoDimVertR3 = 7;
+ var twoDimVertL3 = 8;
+
+ var twoDimTable = [
+ [-1, -1], [-1, -1], // 000000x
+ [7, twoDimVertL3], // 0000010
+ [7, twoDimVertR3], // 0000011
+ [6, twoDimVertL2], [6, twoDimVertL2], // 000010x
+ [6, twoDimVertR2], [6, twoDimVertR2], // 000011x
+ [4, twoDimPass], [4, twoDimPass], // 0001xxx
+ [4, twoDimPass], [4, twoDimPass],
+ [4, twoDimPass], [4, twoDimPass],
+ [4, twoDimPass], [4, twoDimPass],
+ [3, twoDimHoriz], [3, twoDimHoriz], // 001xxxx
+ [3, twoDimHoriz], [3, twoDimHoriz],
+ [3, twoDimHoriz], [3, twoDimHoriz],
+ [3, twoDimHoriz], [3, twoDimHoriz],
+ [3, twoDimHoriz], [3, twoDimHoriz],
+ [3, twoDimHoriz], [3, twoDimHoriz],
+ [3, twoDimHoriz], [3, twoDimHoriz],
+ [3, twoDimHoriz], [3, twoDimHoriz],
+ [3, twoDimVertL1], [3, twoDimVertL1], // 010xxxx
+ [3, twoDimVertL1], [3, twoDimVertL1],
+ [3, twoDimVertL1], [3, twoDimVertL1],
+ [3, twoDimVertL1], [3, twoDimVertL1],
+ [3, twoDimVertL1], [3, twoDimVertL1],
+ [3, twoDimVertL1], [3, twoDimVertL1],
+ [3, twoDimVertL1], [3, twoDimVertL1],
+ [3, twoDimVertL1], [3, twoDimVertL1],
+ [3, twoDimVertR1], [3, twoDimVertR1], // 011xxxx
+ [3, twoDimVertR1], [3, twoDimVertR1],
+ [3, twoDimVertR1], [3, twoDimVertR1],
+ [3, twoDimVertR1], [3, twoDimVertR1],
+ [3, twoDimVertR1], [3, twoDimVertR1],
+ [3, twoDimVertR1], [3, twoDimVertR1],
+ [3, twoDimVertR1], [3, twoDimVertR1],
+ [3, twoDimVertR1], [3, twoDimVertR1],
+ [1, twoDimVert0], [1, twoDimVert0], // 1xxxxxx
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0],
+ [1, twoDimVert0], [1, twoDimVert0]
+ ];
+
+ var whiteTable1 = [
+ [-1, -1], // 00000
+ [12, ccittEOL], // 00001
+ [-1, -1], [-1, -1], // 0001x
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 001xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 010xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 011xx
+ [11, 1792], [11, 1792], // 1000x
+ [12, 1984], // 10010
+ [12, 2048], // 10011
+ [12, 2112], // 10100
+ [12, 2176], // 10101
+ [12, 2240], // 10110
+ [12, 2304], // 10111
+ [11, 1856], [11, 1856], // 1100x
+ [11, 1920], [11, 1920], // 1101x
+ [12, 2368], // 11100
+ [12, 2432], // 11101
+ [12, 2496], // 11110
+ [12, 2560] // 11111
+ ];
+
+ var whiteTable2 = [
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000000xx
+ [8, 29], [8, 29], // 00000010x
+ [8, 30], [8, 30], // 00000011x
+ [8, 45], [8, 45], // 00000100x
+ [8, 46], [8, 46], // 00000101x
+ [7, 22], [7, 22], [7, 22], [7, 22], // 0000011xx
+ [7, 23], [7, 23], [7, 23], [7, 23], // 0000100xx
+ [8, 47], [8, 47], // 00001010x
+ [8, 48], [8, 48], // 00001011x
+ [6, 13], [6, 13], [6, 13], [6, 13], // 000011xxx
+ [6, 13], [6, 13], [6, 13], [6, 13],
+ [7, 20], [7, 20], [7, 20], [7, 20], // 0001000xx
+ [8, 33], [8, 33], // 00010010x
+ [8, 34], [8, 34], // 00010011x
+ [8, 35], [8, 35], // 00010100x
+ [8, 36], [8, 36], // 00010101x
+ [8, 37], [8, 37], // 00010110x
+ [8, 38], [8, 38], // 00010111x
+ [7, 19], [7, 19], [7, 19], [7, 19], // 0001100xx
+ [8, 31], [8, 31], // 00011010x
+ [8, 32], [8, 32], // 00011011x
+ [6, 1], [6, 1], [6, 1], [6, 1], // 000111xxx
+ [6, 1], [6, 1], [6, 1], [6, 1],
+ [6, 12], [6, 12], [6, 12], [6, 12], // 001000xxx
+ [6, 12], [6, 12], [6, 12], [6, 12],
+ [8, 53], [8, 53], // 00100100x
+ [8, 54], [8, 54], // 00100101x
+ [7, 26], [7, 26], [7, 26], [7, 26], // 0010011xx
+ [8, 39], [8, 39], // 00101000x
+ [8, 40], [8, 40], // 00101001x
+ [8, 41], [8, 41], // 00101010x
+ [8, 42], [8, 42], // 00101011x
+ [8, 43], [8, 43], // 00101100x
+ [8, 44], [8, 44], // 00101101x
+ [7, 21], [7, 21], [7, 21], [7, 21], // 0010111xx
+ [7, 28], [7, 28], [7, 28], [7, 28], // 0011000xx
+ [8, 61], [8, 61], // 00110010x
+ [8, 62], [8, 62], // 00110011x
+ [8, 63], [8, 63], // 00110100x
+ [8, 0], [8, 0], // 00110101x
+ [8, 320], [8, 320], // 00110110x
+ [8, 384], [8, 384], // 00110111x
+ [5, 10], [5, 10], [5, 10], [5, 10], // 00111xxxx
+ [5, 10], [5, 10], [5, 10], [5, 10],
+ [5, 10], [5, 10], [5, 10], [5, 10],
+ [5, 10], [5, 10], [5, 10], [5, 10],
+ [5, 11], [5, 11], [5, 11], [5, 11], // 01000xxxx
+ [5, 11], [5, 11], [5, 11], [5, 11],
+ [5, 11], [5, 11], [5, 11], [5, 11],
+ [5, 11], [5, 11], [5, 11], [5, 11],
+ [7, 27], [7, 27], [7, 27], [7, 27], // 0100100xx
+ [8, 59], [8, 59], // 01001010x
+ [8, 60], [8, 60], // 01001011x
+ [9, 1472], // 010011000
+ [9, 1536], // 010011001
+ [9, 1600], // 010011010
+ [9, 1728], // 010011011
+ [7, 18], [7, 18], [7, 18], [7, 18], // 0100111xx
+ [7, 24], [7, 24], [7, 24], [7, 24], // 0101000xx
+ [8, 49], [8, 49], // 01010010x
+ [8, 50], [8, 50], // 01010011x
+ [8, 51], [8, 51], // 01010100x
+ [8, 52], [8, 52], // 01010101x
+ [7, 25], [7, 25], [7, 25], [7, 25], // 0101011xx
+ [8, 55], [8, 55], // 01011000x
+ [8, 56], [8, 56], // 01011001x
+ [8, 57], [8, 57], // 01011010x
+ [8, 58], [8, 58], // 01011011x
+ [6, 192], [6, 192], [6, 192], [6, 192], // 010111xxx
+ [6, 192], [6, 192], [6, 192], [6, 192],
+ [6, 1664], [6, 1664], [6, 1664], [6, 1664], // 011000xxx
+ [6, 1664], [6, 1664], [6, 1664], [6, 1664],
+ [8, 448], [8, 448], // 01100100x
+ [8, 512], [8, 512], // 01100101x
+ [9, 704], // 011001100
+ [9, 768], // 011001101
+ [8, 640], [8, 640], // 01100111x
+ [8, 576], [8, 576], // 01101000x
+ [9, 832], // 011010010
+ [9, 896], // 011010011
+ [9, 960], // 011010100
+ [9, 1024], // 011010101
+ [9, 1088], // 011010110
+ [9, 1152], // 011010111
+ [9, 1216], // 011011000
+ [9, 1280], // 011011001
+ [9, 1344], // 011011010
+ [9, 1408], // 011011011
+ [7, 256], [7, 256], [7, 256], [7, 256], // 0110111xx
+ [4, 2], [4, 2], [4, 2], [4, 2], // 0111xxxxx
+ [4, 2], [4, 2], [4, 2], [4, 2],
+ [4, 2], [4, 2], [4, 2], [4, 2],
+ [4, 2], [4, 2], [4, 2], [4, 2],
+ [4, 2], [4, 2], [4, 2], [4, 2],
+ [4, 2], [4, 2], [4, 2], [4, 2],
+ [4, 2], [4, 2], [4, 2], [4, 2],
+ [4, 2], [4, 2], [4, 2], [4, 2],
+ [4, 3], [4, 3], [4, 3], [4, 3], // 1000xxxxx
+ [4, 3], [4, 3], [4, 3], [4, 3],
+ [4, 3], [4, 3], [4, 3], [4, 3],
+ [4, 3], [4, 3], [4, 3], [4, 3],
+ [4, 3], [4, 3], [4, 3], [4, 3],
+ [4, 3], [4, 3], [4, 3], [4, 3],
+ [4, 3], [4, 3], [4, 3], [4, 3],
+ [4, 3], [4, 3], [4, 3], [4, 3],
+ [5, 128], [5, 128], [5, 128], [5, 128], // 10010xxxx
+ [5, 128], [5, 128], [5, 128], [5, 128],
+ [5, 128], [5, 128], [5, 128], [5, 128],
+ [5, 128], [5, 128], [5, 128], [5, 128],
+ [5, 8], [5, 8], [5, 8], [5, 8], // 10011xxxx
+ [5, 8], [5, 8], [5, 8], [5, 8],
+ [5, 8], [5, 8], [5, 8], [5, 8],
+ [5, 8], [5, 8], [5, 8], [5, 8],
+ [5, 9], [5, 9], [5, 9], [5, 9], // 10100xxxx
+ [5, 9], [5, 9], [5, 9], [5, 9],
+ [5, 9], [5, 9], [5, 9], [5, 9],
+ [5, 9], [5, 9], [5, 9], [5, 9],
+ [6, 16], [6, 16], [6, 16], [6, 16], // 101010xxx
+ [6, 16], [6, 16], [6, 16], [6, 16],
+ [6, 17], [6, 17], [6, 17], [6, 17], // 101011xxx
+ [6, 17], [6, 17], [6, 17], [6, 17],
+ [4, 4], [4, 4], [4, 4], [4, 4], // 1011xxxxx
+ [4, 4], [4, 4], [4, 4], [4, 4],
+ [4, 4], [4, 4], [4, 4], [4, 4],
+ [4, 4], [4, 4], [4, 4], [4, 4],
+ [4, 4], [4, 4], [4, 4], [4, 4],
+ [4, 4], [4, 4], [4, 4], [4, 4],
+ [4, 4], [4, 4], [4, 4], [4, 4],
+ [4, 4], [4, 4], [4, 4], [4, 4],
+ [4, 5], [4, 5], [4, 5], [4, 5], // 1100xxxxx
+ [4, 5], [4, 5], [4, 5], [4, 5],
+ [4, 5], [4, 5], [4, 5], [4, 5],
+ [4, 5], [4, 5], [4, 5], [4, 5],
+ [4, 5], [4, 5], [4, 5], [4, 5],
+ [4, 5], [4, 5], [4, 5], [4, 5],
+ [4, 5], [4, 5], [4, 5], [4, 5],
+ [4, 5], [4, 5], [4, 5], [4, 5],
+ [6, 14], [6, 14], [6, 14], [6, 14], // 110100xxx
+ [6, 14], [6, 14], [6, 14], [6, 14],
+ [6, 15], [6, 15], [6, 15], [6, 15], // 110101xxx
+ [6, 15], [6, 15], [6, 15], [6, 15],
+ [5, 64], [5, 64], [5, 64], [5, 64], // 11011xxxx
+ [5, 64], [5, 64], [5, 64], [5, 64],
+ [5, 64], [5, 64], [5, 64], [5, 64],
+ [5, 64], [5, 64], [5, 64], [5, 64],
+ [4, 6], [4, 6], [4, 6], [4, 6], // 1110xxxxx
+ [4, 6], [4, 6], [4, 6], [4, 6],
+ [4, 6], [4, 6], [4, 6], [4, 6],
+ [4, 6], [4, 6], [4, 6], [4, 6],
+ [4, 6], [4, 6], [4, 6], [4, 6],
+ [4, 6], [4, 6], [4, 6], [4, 6],
+ [4, 6], [4, 6], [4, 6], [4, 6],
+ [4, 6], [4, 6], [4, 6], [4, 6],
+ [4, 7], [4, 7], [4, 7], [4, 7], // 1111xxxxx
+ [4, 7], [4, 7], [4, 7], [4, 7],
+ [4, 7], [4, 7], [4, 7], [4, 7],
+ [4, 7], [4, 7], [4, 7], [4, 7],
+ [4, 7], [4, 7], [4, 7], [4, 7],
+ [4, 7], [4, 7], [4, 7], [4, 7],
+ [4, 7], [4, 7], [4, 7], [4, 7],
+ [4, 7], [4, 7], [4, 7], [4, 7]
+ ];
+
+ var blackTable1 = [
+ [-1, -1], [-1, -1], // 000000000000x
+ [12, ccittEOL], [12, ccittEOL], // 000000000001x
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000001xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000010xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000011xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000100xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000101xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000110xx
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000111xx
+ [11, 1792], [11, 1792], [11, 1792], [11, 1792], // 00000001000xx
+ [12, 1984], [12, 1984], // 000000010010x
+ [12, 2048], [12, 2048], // 000000010011x
+ [12, 2112], [12, 2112], // 000000010100x
+ [12, 2176], [12, 2176], // 000000010101x
+ [12, 2240], [12, 2240], // 000000010110x
+ [12, 2304], [12, 2304], // 000000010111x
+ [11, 1856], [11, 1856], [11, 1856], [11, 1856], // 00000001100xx
+ [11, 1920], [11, 1920], [11, 1920], [11, 1920], // 00000001101xx
+ [12, 2368], [12, 2368], // 000000011100x
+ [12, 2432], [12, 2432], // 000000011101x
+ [12, 2496], [12, 2496], // 000000011110x
+ [12, 2560], [12, 2560], // 000000011111x
+ [10, 18], [10, 18], [10, 18], [10, 18], // 0000001000xxx
+ [10, 18], [10, 18], [10, 18], [10, 18],
+ [12, 52], [12, 52], // 000000100100x
+ [13, 640], // 0000001001010
+ [13, 704], // 0000001001011
+ [13, 768], // 0000001001100
+ [13, 832], // 0000001001101
+ [12, 55], [12, 55], // 000000100111x
+ [12, 56], [12, 56], // 000000101000x
+ [13, 1280], // 0000001010010
+ [13, 1344], // 0000001010011
+ [13, 1408], // 0000001010100
+ [13, 1472], // 0000001010101
+ [12, 59], [12, 59], // 000000101011x
+ [12, 60], [12, 60], // 000000101100x
+ [13, 1536], // 0000001011010
+ [13, 1600], // 0000001011011
+ [11, 24], [11, 24], [11, 24], [11, 24], // 00000010111xx
+ [11, 25], [11, 25], [11, 25], [11, 25], // 00000011000xx
+ [13, 1664], // 0000001100100
+ [13, 1728], // 0000001100101
+ [12, 320], [12, 320], // 000000110011x
+ [12, 384], [12, 384], // 000000110100x
+ [12, 448], [12, 448], // 000000110101x
+ [13, 512], // 0000001101100
+ [13, 576], // 0000001101101
+ [12, 53], [12, 53], // 000000110111x
+ [12, 54], [12, 54], // 000000111000x
+ [13, 896], // 0000001110010
+ [13, 960], // 0000001110011
+ [13, 1024], // 0000001110100
+ [13, 1088], // 0000001110101
+ [13, 1152], // 0000001110110
+ [13, 1216], // 0000001110111
+ [10, 64], [10, 64], [10, 64], [10, 64], // 0000001111xxx
+ [10, 64], [10, 64], [10, 64], [10, 64]
+ ];
+
+ var blackTable2 = [
+ [8, 13], [8, 13], [8, 13], [8, 13], // 00000100xxxx
+ [8, 13], [8, 13], [8, 13], [8, 13],
+ [8, 13], [8, 13], [8, 13], [8, 13],
+ [8, 13], [8, 13], [8, 13], [8, 13],
+ [11, 23], [11, 23], // 00000101000x
+ [12, 50], // 000001010010
+ [12, 51], // 000001010011
+ [12, 44], // 000001010100
+ [12, 45], // 000001010101
+ [12, 46], // 000001010110
+ [12, 47], // 000001010111
+ [12, 57], // 000001011000
+ [12, 58], // 000001011001
+ [12, 61], // 000001011010
+ [12, 256], // 000001011011
+ [10, 16], [10, 16], [10, 16], [10, 16], // 0000010111xx
+ [10, 17], [10, 17], [10, 17], [10, 17], // 0000011000xx
+ [12, 48], // 000001100100
+ [12, 49], // 000001100101
+ [12, 62], // 000001100110
+ [12, 63], // 000001100111
+ [12, 30], // 000001101000
+ [12, 31], // 000001101001
+ [12, 32], // 000001101010
+ [12, 33], // 000001101011
+ [12, 40], // 000001101100
+ [12, 41], // 000001101101
+ [11, 22], [11, 22], // 00000110111x
+ [8, 14], [8, 14], [8, 14], [8, 14], // 00000111xxxx
+ [8, 14], [8, 14], [8, 14], [8, 14],
+ [8, 14], [8, 14], [8, 14], [8, 14],
+ [8, 14], [8, 14], [8, 14], [8, 14],
+ [7, 10], [7, 10], [7, 10], [7, 10], // 0000100xxxxx
+ [7, 10], [7, 10], [7, 10], [7, 10],
+ [7, 10], [7, 10], [7, 10], [7, 10],
+ [7, 10], [7, 10], [7, 10], [7, 10],
+ [7, 10], [7, 10], [7, 10], [7, 10],
+ [7, 10], [7, 10], [7, 10], [7, 10],
+ [7, 10], [7, 10], [7, 10], [7, 10],
+ [7, 10], [7, 10], [7, 10], [7, 10],
+ [7, 11], [7, 11], [7, 11], [7, 11], // 0000101xxxxx
+ [7, 11], [7, 11], [7, 11], [7, 11],
+ [7, 11], [7, 11], [7, 11], [7, 11],
+ [7, 11], [7, 11], [7, 11], [7, 11],
+ [7, 11], [7, 11], [7, 11], [7, 11],
+ [7, 11], [7, 11], [7, 11], [7, 11],
+ [7, 11], [7, 11], [7, 11], [7, 11],
+ [7, 11], [7, 11], [7, 11], [7, 11],
+ [9, 15], [9, 15], [9, 15], [9, 15], // 000011000xxx
+ [9, 15], [9, 15], [9, 15], [9, 15],
+ [12, 128], // 000011001000
+ [12, 192], // 000011001001
+ [12, 26], // 000011001010
+ [12, 27], // 000011001011
+ [12, 28], // 000011001100
+ [12, 29], // 000011001101
+ [11, 19], [11, 19], // 00001100111x
+ [11, 20], [11, 20], // 00001101000x
+ [12, 34], // 000011010010
+ [12, 35], // 000011010011
+ [12, 36], // 000011010100
+ [12, 37], // 000011010101
+ [12, 38], // 000011010110
+ [12, 39], // 000011010111
+ [11, 21], [11, 21], // 00001101100x
+ [12, 42], // 000011011010
+ [12, 43], // 000011011011
+ [10, 0], [10, 0], [10, 0], [10, 0], // 0000110111xx
+ [7, 12], [7, 12], [7, 12], [7, 12], // 0000111xxxxx
+ [7, 12], [7, 12], [7, 12], [7, 12],
+ [7, 12], [7, 12], [7, 12], [7, 12],
+ [7, 12], [7, 12], [7, 12], [7, 12],
+ [7, 12], [7, 12], [7, 12], [7, 12],
+ [7, 12], [7, 12], [7, 12], [7, 12],
+ [7, 12], [7, 12], [7, 12], [7, 12],
+ [7, 12], [7, 12], [7, 12], [7, 12]
+ ];
+
+ var blackTable3 = [
+ [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000xx
+ [6, 9], // 000100
+ [6, 8], // 000101
+ [5, 7], [5, 7], // 00011x
+ [4, 6], [4, 6], [4, 6], [4, 6], // 0010xx
+ [4, 5], [4, 5], [4, 5], [4, 5], // 0011xx
+ [3, 1], [3, 1], [3, 1], [3, 1], // 010xxx
+ [3, 1], [3, 1], [3, 1], [3, 1],
+ [3, 4], [3, 4], [3, 4], [3, 4], // 011xxx
+ [3, 4], [3, 4], [3, 4], [3, 4],
+ [2, 3], [2, 3], [2, 3], [2, 3], // 10xxxx
+ [2, 3], [2, 3], [2, 3], [2, 3],
+ [2, 3], [2, 3], [2, 3], [2, 3],
+ [2, 3], [2, 3], [2, 3], [2, 3],
+ [2, 2], [2, 2], [2, 2], [2, 2], // 11xxxx
+ [2, 2], [2, 2], [2, 2], [2, 2],
+ [2, 2], [2, 2], [2, 2], [2, 2],
+ [2, 2], [2, 2], [2, 2], [2, 2]
+ ];
+
+ function CCITTFaxStream(str, maybeLength, params) {
+ this.str = str;
+ this.dict = str.dict;
+
+ if (!isDict(params)) {
+ params = Dict.empty;
+ }
+ this.encoding = params.get('K') || 0;
+ this.eoline = params.get('EndOfLine') || false;
+ this.byteAlign = params.get('EncodedByteAlign') || false;
+ this.columns = params.get('Columns') || 1728;
+ this.rows = params.get('Rows') || 0;
+ var eoblock = params.get('EndOfBlock');
+ if (eoblock === null || eoblock === undefined) {
+ eoblock = true;
+ }
+ this.eoblock = eoblock;
+ this.black = params.get('BlackIs1') || false;
+
+ this.codingLine = new Uint32Array(this.columns + 1);
+ this.refLine = new Uint32Array(this.columns + 2);
+
+ this.codingLine[0] = this.columns;
+ this.codingPos = 0;
+
+ this.row = 0;
+ this.nextLine2D = this.encoding < 0;
+ this.inputBits = 0;
+ this.inputBuf = 0;
+ this.outputBits = 0;
+ this.rowsDone = false;
+
+ var code1;
+ while ((code1 = this.lookBits(12)) === 0) {
+ this.eatBits(1);
+ }
+ if (code1 === 1) {
+ this.eatBits(12);
+ }
+ if (this.encoding > 0) {
+ this.nextLine2D = !this.lookBits(1);
+ this.eatBits(1);
+ }
+
+ DecodeStream.call(this, maybeLength);
+ }
+
+ CCITTFaxStream.prototype = Object.create(DecodeStream.prototype);
+
+ CCITTFaxStream.prototype.readBlock = function() {
+ while (!this.eof) {
+ var c = this.lookChar();
+ this.ensureBuffer(this.bufferLength + 1);
+ this.buffer[this.bufferLength++] = c;
+ }
+ };
+
+ CCITTFaxStream.prototype.addPixels = function(a1, blackPixels) {
+ var codingLine = this.codingLine;
+ var codingPos = this.codingPos;
+
+ if (a1 > codingLine[codingPos]) {
+ if (a1 > this.columns) {
+ info('row is wrong length');
+ this.err = true;
+ a1 = this.columns;
+ }
+ if ((codingPos & 1) ^ blackPixels) {
+ ++codingPos;
+ }
+
+ codingLine[codingPos] = a1;
+ }
+ this.codingPos = codingPos;
+ };
+
+ CCITTFaxStream.prototype.addPixelsNeg = function(a1, blackPixels) {
+ var codingLine = this.codingLine;
+ var codingPos = this.codingPos;
+
+ if (a1 > codingLine[codingPos]) {
+ if (a1 > this.columns) {
+ info('row is wrong length');
+ this.err = true;
+ a1 = this.columns;
+ }
+ if ((codingPos & 1) ^ blackPixels) {
+ ++codingPos;
+ }
+
+ codingLine[codingPos] = a1;
+ } else if (a1 < codingLine[codingPos]) {
+ if (a1 < 0) {
+ info('invalid code');
+ this.err = true;
+ a1 = 0;
+ }
+ while (codingPos > 0 && a1 < codingLine[codingPos - 1]) {
+ --codingPos;
+ }
+ codingLine[codingPos] = a1;
+ }
+
+ this.codingPos = codingPos;
+ };
+
+ CCITTFaxStream.prototype.lookChar = function() {
+ var refLine = this.refLine;
+ var codingLine = this.codingLine;
+ var columns = this.columns;
+
+ var refPos, blackPixels, bits, i;
+
+ if (this.outputBits === 0) {
+ if (this.rowsDone) {
+ this.eof = true;
+ }
+ if (this.eof) {
+ return null;
+ }
+ this.err = false;
+
+ var code1, code2, code3;
+ if (this.nextLine2D) {
+ for (i = 0; codingLine[i] < columns; ++i) {
+ refLine[i] = codingLine[i];
+ }
+ refLine[i++] = columns;
+ refLine[i] = columns;
+ codingLine[0] = 0;
+ this.codingPos = 0;
+ refPos = 0;
+ blackPixels = 0;
+
+ while (codingLine[this.codingPos] < columns) {
+ code1 = this.getTwoDimCode();
+ switch (code1) {
+ case twoDimPass:
+ this.addPixels(refLine[refPos + 1], blackPixels);
+ if (refLine[refPos + 1] < columns) {
+ refPos += 2;
+ }
+ break;
+ case twoDimHoriz:
+ code1 = code2 = 0;
+ if (blackPixels) {
+ do {
+ code1 += (code3 = this.getBlackCode());
+ } while (code3 >= 64);
+ do {
+ code2 += (code3 = this.getWhiteCode());
+ } while (code3 >= 64);
+ } else {
+ do {
+ code1 += (code3 = this.getWhiteCode());
+ } while (code3 >= 64);
+ do {
+ code2 += (code3 = this.getBlackCode());
+ } while (code3 >= 64);
+ }
+ this.addPixels(codingLine[this.codingPos] +
+ code1, blackPixels);
+ if (codingLine[this.codingPos] < columns) {
+ this.addPixels(codingLine[this.codingPos] + code2,
+ blackPixels ^ 1);
+ }
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ break;
+ case twoDimVertR3:
+ this.addPixels(refLine[refPos] + 3, blackPixels);
+ blackPixels ^= 1;
+ if (codingLine[this.codingPos] < columns) {
+ ++refPos;
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ }
+ break;
+ case twoDimVertR2:
+ this.addPixels(refLine[refPos] + 2, blackPixels);
+ blackPixels ^= 1;
+ if (codingLine[this.codingPos] < columns) {
+ ++refPos;
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ }
+ break;
+ case twoDimVertR1:
+ this.addPixels(refLine[refPos] + 1, blackPixels);
+ blackPixels ^= 1;
+ if (codingLine[this.codingPos] < columns) {
+ ++refPos;
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ }
+ break;
+ case twoDimVert0:
+ this.addPixels(refLine[refPos], blackPixels);
+ blackPixels ^= 1;
+ if (codingLine[this.codingPos] < columns) {
+ ++refPos;
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ }
+ break;
+ case twoDimVertL3:
+ this.addPixelsNeg(refLine[refPos] - 3, blackPixels);
+ blackPixels ^= 1;
+ if (codingLine[this.codingPos] < columns) {
+ if (refPos > 0) {
+ --refPos;
+ } else {
+ ++refPos;
+ }
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ }
+ break;
+ case twoDimVertL2:
+ this.addPixelsNeg(refLine[refPos] - 2, blackPixels);
+ blackPixels ^= 1;
+ if (codingLine[this.codingPos] < columns) {
+ if (refPos > 0) {
+ --refPos;
+ } else {
+ ++refPos;
+ }
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ }
+ break;
+ case twoDimVertL1:
+ this.addPixelsNeg(refLine[refPos] - 1, blackPixels);
+ blackPixels ^= 1;
+ if (codingLine[this.codingPos] < columns) {
+ if (refPos > 0) {
+ --refPos;
+ } else {
+ ++refPos;
+ }
+ while (refLine[refPos] <= codingLine[this.codingPos] &&
+ refLine[refPos] < columns) {
+ refPos += 2;
+ }
+ }
+ break;
+ case ccittEOF:
+ this.addPixels(columns, 0);
+ this.eof = true;
+ break;
+ default:
+ info('bad 2d code');
+ this.addPixels(columns, 0);
+ this.err = true;
+ }
+ }
+ } else {
+ codingLine[0] = 0;
+ this.codingPos = 0;
+ blackPixels = 0;
+ while (codingLine[this.codingPos] < columns) {
+ code1 = 0;
+ if (blackPixels) {
+ do {
+ code1 += (code3 = this.getBlackCode());
+ } while (code3 >= 64);
+ } else {
+ do {
+ code1 += (code3 = this.getWhiteCode());
+ } while (code3 >= 64);
+ }
+ this.addPixels(codingLine[this.codingPos] + code1, blackPixels);
+ blackPixels ^= 1;
+ }
+ }
+
+ var gotEOL = false;
+
+ if (this.byteAlign) {
+ this.inputBits &= ~7;
+ }
+
+ if (!this.eoblock && this.row === this.rows - 1) {
+ this.rowsDone = true;
+ } else {
+ code1 = this.lookBits(12);
+ if (this.eoline) {
+ while (code1 !== ccittEOF && code1 !== 1) {
+ this.eatBits(1);
+ code1 = this.lookBits(12);
+ }
+ } else {
+ while (code1 === 0) {
+ this.eatBits(1);
+ code1 = this.lookBits(12);
+ }
+ }
+ if (code1 === 1) {
+ this.eatBits(12);
+ gotEOL = true;
+ } else if (code1 === ccittEOF) {
+ this.eof = true;
+ }
+ }
+
+ if (!this.eof && this.encoding > 0 && !this.rowsDone) {
+ this.nextLine2D = !this.lookBits(1);
+ this.eatBits(1);
+ }
+
+ if (this.eoblock && gotEOL && this.byteAlign) {
+ code1 = this.lookBits(12);
+ if (code1 === 1) {
+ this.eatBits(12);
+ if (this.encoding > 0) {
+ this.lookBits(1);
+ this.eatBits(1);
+ }
+ if (this.encoding >= 0) {
+ for (i = 0; i < 4; ++i) {
+ code1 = this.lookBits(12);
+ if (code1 !== 1) {
+ info('bad rtc code: ' + code1);
+ }
+ this.eatBits(12);
+ if (this.encoding > 0) {
+ this.lookBits(1);
+ this.eatBits(1);
+ }
+ }
+ }
+ this.eof = true;
+ }
+ } else if (this.err && this.eoline) {
+ while (true) {
+ code1 = this.lookBits(13);
+ if (code1 === ccittEOF) {
+ this.eof = true;
+ return null;
+ }
+ if ((code1 >> 1) === 1) {
+ break;
+ }
+ this.eatBits(1);
+ }
+ this.eatBits(12);
+ if (this.encoding > 0) {
+ this.eatBits(1);
+ this.nextLine2D = !(code1 & 1);
+ }
+ }
+
+ if (codingLine[0] > 0) {
+ this.outputBits = codingLine[this.codingPos = 0];
+ } else {
+ this.outputBits = codingLine[this.codingPos = 1];
+ }
+ this.row++;
+ }
+
+ var c;
+ if (this.outputBits >= 8) {
+ c = (this.codingPos & 1) ? 0 : 0xFF;
+ this.outputBits -= 8;
+ if (this.outputBits === 0 && codingLine[this.codingPos] < columns) {
+ this.codingPos++;
+ this.outputBits = (codingLine[this.codingPos] -
+ codingLine[this.codingPos - 1]);
+ }
+ } else {
+ bits = 8;
+ c = 0;
+ do {
+ if (this.outputBits > bits) {
+ c <<= bits;
+ if (!(this.codingPos & 1)) {
+ c |= 0xFF >> (8 - bits);
+ }
+ this.outputBits -= bits;
+ bits = 0;
+ } else {
+ c <<= this.outputBits;
+ if (!(this.codingPos & 1)) {
+ c |= 0xFF >> (8 - this.outputBits);
+ }
+ bits -= this.outputBits;
+ this.outputBits = 0;
+ if (codingLine[this.codingPos] < columns) {
+ this.codingPos++;
+ this.outputBits = (codingLine[this.codingPos] -
+ codingLine[this.codingPos - 1]);
+ } else if (bits > 0) {
+ c <<= bits;
+ bits = 0;
+ }
+ }
+ } while (bits);
+ }
+ if (this.black) {
+ c ^= 0xFF;
+ }
+ return c;
+ };
+
+ // This functions returns the code found from the table.
+ // The start and end parameters set the boundaries for searching the table.
+ // The limit parameter is optional. Function returns an array with three
+ // values. The first array element indicates whether a valid code is being
+ // returned. The second array element is the actual code. The third array
+ // element indicates whether EOF was reached.
+ CCITTFaxStream.prototype.findTableCode = function(start, end, table, limit) {
+ var limitValue = limit || 0;
+ for (var i = start; i <= end; ++i) {
+ var code = this.lookBits(i);
+ if (code === ccittEOF) {
+ return [true, 1, false];
+ }
+ if (i < end) {
+ code <<= end - i;
+ }
+ if (!limitValue || code >= limitValue) {
+ var p = table[code - limitValue];
+ if (p[0] === i) {
+ this.eatBits(i);
+ return [true, p[1], true];
+ }
+ }
+ }
+ return [false, 0, false];
+ };
+
+ CCITTFaxStream.prototype.getTwoDimCode = function() {
+ var code = 0;
+ var p;
+ if (this.eoblock) {
+ code = this.lookBits(7);
+ p = twoDimTable[code];
+ if (p && p[0] > 0) {
+ this.eatBits(p[0]);
+ return p[1];
+ }
+ } else {
+ var result = this.findTableCode(1, 7, twoDimTable);
+ if (result[0] && result[2]) {
+ return result[1];
+ }
+ }
+ info('Bad two dim code');
+ return ccittEOF;
+ };
+
+ CCITTFaxStream.prototype.getWhiteCode = function() {
+ var code = 0;
+ var p;
+ if (this.eoblock) {
+ code = this.lookBits(12);
+ if (code === ccittEOF) {
+ return 1;
+ }
+
+ if ((code >> 5) === 0) {
+ p = whiteTable1[code];
+ } else {
+ p = whiteTable2[code >> 3];
+ }
+
+ if (p[0] > 0) {
+ this.eatBits(p[0]);
+ return p[1];
+ }
+ } else {
+ var result = this.findTableCode(1, 9, whiteTable2);
+ if (result[0]) {
+ return result[1];
+ }
+
+ result = this.findTableCode(11, 12, whiteTable1);
+ if (result[0]) {
+ return result[1];
+ }
+ }
+ info('bad white code');
+ this.eatBits(1);
+ return 1;
+ };
+
+ CCITTFaxStream.prototype.getBlackCode = function() {
+ var code, p;
+ if (this.eoblock) {
+ code = this.lookBits(13);
+ if (code === ccittEOF) {
+ return 1;
+ }
+ if ((code >> 7) === 0) {
+ p = blackTable1[code];
+ } else if ((code >> 9) === 0 && (code >> 7) !== 0) {
+ p = blackTable2[(code >> 1) - 64];
+ } else {
+ p = blackTable3[code >> 7];
+ }
+
+ if (p[0] > 0) {
+ this.eatBits(p[0]);
+ return p[1];
+ }
+ } else {
+ var result = this.findTableCode(2, 6, blackTable3);
+ if (result[0]) {
+ return result[1];
+ }
+
+ result = this.findTableCode(7, 12, blackTable2, 64);
+ if (result[0]) {
+ return result[1];
+ }
+
+ result = this.findTableCode(10, 13, blackTable1);
+ if (result[0]) {
+ return result[1];
+ }
+ }
+ info('bad black code');
+ this.eatBits(1);
+ return 1;
+ };
+
+ CCITTFaxStream.prototype.lookBits = function(n) {
+ var c;
+ while (this.inputBits < n) {
+ if ((c = this.str.getByte()) === -1) {
+ if (this.inputBits === 0) {
+ return ccittEOF;
+ }
+ return ((this.inputBuf << (n - this.inputBits)) &
+ (0xFFFF >> (16 - n)));
+ }
+ this.inputBuf = (this.inputBuf << 8) | c;
+ this.inputBits += 8;
+ }
+ return (this.inputBuf >> (this.inputBits - n)) & (0xFFFF >> (16 - n));
+ };
+
+ CCITTFaxStream.prototype.eatBits = function(n) {
+ if ((this.inputBits -= n) < 0) {
+ this.inputBits = 0;
+ }
+ };
+
+ return CCITTFaxStream;
+})();
+
+export {
+ CCITTFaxStream,
+};
diff --git a/src/core/jbig2_stream.js b/src/core/jbig2_stream.js
new file mode 100644
index 000000000..ed7bec65a
--- /dev/null
+++ b/src/core/jbig2_stream.js
@@ -0,0 +1,79 @@
+/* Copyright 2012 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { isDict, isStream } from './primitives';
+import { DecodeStream } from './stream';
+import { Jbig2Image } from './jbig2';
+import { shadow } from '../shared/util';
+
+/**
+ * For JBIG2's we use a library to decode these images and
+ * the stream behaves like all the other DecodeStreams.
+ */
+var Jbig2Stream = (function Jbig2StreamClosure() {
+ function Jbig2Stream(stream, maybeLength, dict, params) {
+ this.stream = stream;
+ this.maybeLength = maybeLength;
+ this.dict = dict;
+ this.params = params;
+
+ DecodeStream.call(this, maybeLength);
+ }
+
+ Jbig2Stream.prototype = Object.create(DecodeStream.prototype);
+
+ Object.defineProperty(Jbig2Stream.prototype, 'bytes', {
+ get() {
+ // If this.maybeLength is null, we'll get the entire stream.
+ return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength));
+ },
+ configurable: true,
+ });
+
+ Jbig2Stream.prototype.ensureBuffer = function(req) {
+ if (this.bufferLength) {
+ return;
+ }
+
+ var jbig2Image = new Jbig2Image();
+
+ var chunks = [];
+ if (isDict(this.params)) {
+ var globalsStream = this.params.get('JBIG2Globals');
+ if (isStream(globalsStream)) {
+ var globals = globalsStream.getBytes();
+ chunks.push({ data: globals, start: 0, end: globals.length, });
+ }
+ }
+ chunks.push({ data: this.bytes, start: 0, end: this.bytes.length, });
+ var data = jbig2Image.parseChunks(chunks);
+ var dataLength = data.length;
+
+ // JBIG2 had black as 1 and white as 0, inverting the colors
+ for (var i = 0; i < dataLength; i++) {
+ data[i] ^= 0xFF;
+ }
+
+ this.buffer = data;
+ this.bufferLength = dataLength;
+ this.eof = true;
+ };
+
+ return Jbig2Stream;
+})();
+
+export {
+ Jbig2Stream,
+};
diff --git a/src/core/parser.js b/src/core/parser.js
index 743197222..074990e78 100644
--- a/src/core/parser.js
+++ b/src/core/parser.js
@@ -14,8 +14,8 @@
*/
import {
- Ascii85Stream, AsciiHexStream, CCITTFaxStream, FlateStream, Jbig2Stream,
- JpegStream, JpxStream, LZWStream, NullStream, PredictorStream, RunLengthStream
+ Ascii85Stream, AsciiHexStream, FlateStream, JpegStream, JpxStream, LZWStream,
+ NullStream, PredictorStream, RunLengthStream
} from './stream';
import {
assert, FormatError, info, isNum, isString, MissingDataException, StreamType,
@@ -24,6 +24,8 @@ import {
import {
Cmd, Dict, EOF, isCmd, isDict, isEOF, isName, Name, Ref
} from './primitives';
+import { CCITTFaxStream } from './ccitt_stream';
+import { Jbig2Stream } from './jbig2_stream';
var MAX_LENGTH_TO_CACHE = 1000;
diff --git a/src/core/stream.js b/src/core/stream.js
index 38a81d5cb..5c50f434b 100644
--- a/src/core/stream.js
+++ b/src/core/stream.js
@@ -14,10 +14,9 @@
*/
import {
- createObjectURL, FormatError, info, isSpace, shadow, Util
+ createObjectURL, FormatError, isSpace, shadow, Util
} from '../shared/util';
-import { Dict, isDict, isStream } from './primitives';
-import { Jbig2Image } from './jbig2';
+import { isDict } from './primitives';
import { JpegImage } from './jpg';
import { JpxImage } from './jpx';
@@ -1035,62 +1034,6 @@ var JpxStream = (function JpxStreamClosure() {
return JpxStream;
})();
-/**
- * For JBIG2's we use a library to decode these images and
- * the stream behaves like all the other DecodeStreams.
- */
-var Jbig2Stream = (function Jbig2StreamClosure() {
- function Jbig2Stream(stream, maybeLength, dict, params) {
- this.stream = stream;
- this.maybeLength = maybeLength;
- this.dict = dict;
- this.params = params;
-
- DecodeStream.call(this, maybeLength);
- }
-
- Jbig2Stream.prototype = Object.create(DecodeStream.prototype);
-
- Object.defineProperty(Jbig2Stream.prototype, 'bytes', {
- get: function Jbig2Stream_bytes() {
- // If this.maybeLength is null, we'll get the entire stream.
- return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength));
- },
- configurable: true,
- });
-
- Jbig2Stream.prototype.ensureBuffer = function Jbig2Stream_ensureBuffer(req) {
- if (this.bufferLength) {
- return;
- }
-
- var jbig2Image = new Jbig2Image();
-
- var chunks = [];
- if (isDict(this.params)) {
- var globalsStream = this.params.get('JBIG2Globals');
- if (isStream(globalsStream)) {
- var globals = globalsStream.getBytes();
- chunks.push({ data: globals, start: 0, end: globals.length, });
- }
- }
- chunks.push({ data: this.bytes, start: 0, end: this.bytes.length, });
- var data = jbig2Image.parseChunks(chunks);
- var dataLength = data.length;
-
- // JBIG2 had black as 1 and white as 0, inverting the colors
- for (var i = 0; i < dataLength; i++) {
- data[i] ^= 0xFF;
- }
-
- this.buffer = data;
- this.bufferLength = dataLength;
- this.eof = true;
- };
-
- return Jbig2Stream;
-})();
-
var DecryptStream = (function DecryptStreamClosure() {
function DecryptStream(str, maybeLength, decrypt) {
this.str = str;
@@ -1328,1010 +1271,6 @@ var RunLengthStream = (function RunLengthStreamClosure() {
return RunLengthStream;
})();
-var CCITTFaxStream = (function CCITTFaxStreamClosure() {
-
- var ccittEOL = -2;
- var ccittEOF = -1;
- var twoDimPass = 0;
- var twoDimHoriz = 1;
- var twoDimVert0 = 2;
- var twoDimVertR1 = 3;
- var twoDimVertL1 = 4;
- var twoDimVertR2 = 5;
- var twoDimVertL2 = 6;
- var twoDimVertR3 = 7;
- var twoDimVertL3 = 8;
-
- var twoDimTable = [
- [-1, -1], [-1, -1], // 000000x
- [7, twoDimVertL3], // 0000010
- [7, twoDimVertR3], // 0000011
- [6, twoDimVertL2], [6, twoDimVertL2], // 000010x
- [6, twoDimVertR2], [6, twoDimVertR2], // 000011x
- [4, twoDimPass], [4, twoDimPass], // 0001xxx
- [4, twoDimPass], [4, twoDimPass],
- [4, twoDimPass], [4, twoDimPass],
- [4, twoDimPass], [4, twoDimPass],
- [3, twoDimHoriz], [3, twoDimHoriz], // 001xxxx
- [3, twoDimHoriz], [3, twoDimHoriz],
- [3, twoDimHoriz], [3, twoDimHoriz],
- [3, twoDimHoriz], [3, twoDimHoriz],
- [3, twoDimHoriz], [3, twoDimHoriz],
- [3, twoDimHoriz], [3, twoDimHoriz],
- [3, twoDimHoriz], [3, twoDimHoriz],
- [3, twoDimHoriz], [3, twoDimHoriz],
- [3, twoDimVertL1], [3, twoDimVertL1], // 010xxxx
- [3, twoDimVertL1], [3, twoDimVertL1],
- [3, twoDimVertL1], [3, twoDimVertL1],
- [3, twoDimVertL1], [3, twoDimVertL1],
- [3, twoDimVertL1], [3, twoDimVertL1],
- [3, twoDimVertL1], [3, twoDimVertL1],
- [3, twoDimVertL1], [3, twoDimVertL1],
- [3, twoDimVertL1], [3, twoDimVertL1],
- [3, twoDimVertR1], [3, twoDimVertR1], // 011xxxx
- [3, twoDimVertR1], [3, twoDimVertR1],
- [3, twoDimVertR1], [3, twoDimVertR1],
- [3, twoDimVertR1], [3, twoDimVertR1],
- [3, twoDimVertR1], [3, twoDimVertR1],
- [3, twoDimVertR1], [3, twoDimVertR1],
- [3, twoDimVertR1], [3, twoDimVertR1],
- [3, twoDimVertR1], [3, twoDimVertR1],
- [1, twoDimVert0], [1, twoDimVert0], // 1xxxxxx
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0],
- [1, twoDimVert0], [1, twoDimVert0]
- ];
-
- var whiteTable1 = [
- [-1, -1], // 00000
- [12, ccittEOL], // 00001
- [-1, -1], [-1, -1], // 0001x
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 001xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 010xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 011xx
- [11, 1792], [11, 1792], // 1000x
- [12, 1984], // 10010
- [12, 2048], // 10011
- [12, 2112], // 10100
- [12, 2176], // 10101
- [12, 2240], // 10110
- [12, 2304], // 10111
- [11, 1856], [11, 1856], // 1100x
- [11, 1920], [11, 1920], // 1101x
- [12, 2368], // 11100
- [12, 2432], // 11101
- [12, 2496], // 11110
- [12, 2560] // 11111
- ];
-
- var whiteTable2 = [
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000000xx
- [8, 29], [8, 29], // 00000010x
- [8, 30], [8, 30], // 00000011x
- [8, 45], [8, 45], // 00000100x
- [8, 46], [8, 46], // 00000101x
- [7, 22], [7, 22], [7, 22], [7, 22], // 0000011xx
- [7, 23], [7, 23], [7, 23], [7, 23], // 0000100xx
- [8, 47], [8, 47], // 00001010x
- [8, 48], [8, 48], // 00001011x
- [6, 13], [6, 13], [6, 13], [6, 13], // 000011xxx
- [6, 13], [6, 13], [6, 13], [6, 13],
- [7, 20], [7, 20], [7, 20], [7, 20], // 0001000xx
- [8, 33], [8, 33], // 00010010x
- [8, 34], [8, 34], // 00010011x
- [8, 35], [8, 35], // 00010100x
- [8, 36], [8, 36], // 00010101x
- [8, 37], [8, 37], // 00010110x
- [8, 38], [8, 38], // 00010111x
- [7, 19], [7, 19], [7, 19], [7, 19], // 0001100xx
- [8, 31], [8, 31], // 00011010x
- [8, 32], [8, 32], // 00011011x
- [6, 1], [6, 1], [6, 1], [6, 1], // 000111xxx
- [6, 1], [6, 1], [6, 1], [6, 1],
- [6, 12], [6, 12], [6, 12], [6, 12], // 001000xxx
- [6, 12], [6, 12], [6, 12], [6, 12],
- [8, 53], [8, 53], // 00100100x
- [8, 54], [8, 54], // 00100101x
- [7, 26], [7, 26], [7, 26], [7, 26], // 0010011xx
- [8, 39], [8, 39], // 00101000x
- [8, 40], [8, 40], // 00101001x
- [8, 41], [8, 41], // 00101010x
- [8, 42], [8, 42], // 00101011x
- [8, 43], [8, 43], // 00101100x
- [8, 44], [8, 44], // 00101101x
- [7, 21], [7, 21], [7, 21], [7, 21], // 0010111xx
- [7, 28], [7, 28], [7, 28], [7, 28], // 0011000xx
- [8, 61], [8, 61], // 00110010x
- [8, 62], [8, 62], // 00110011x
- [8, 63], [8, 63], // 00110100x
- [8, 0], [8, 0], // 00110101x
- [8, 320], [8, 320], // 00110110x
- [8, 384], [8, 384], // 00110111x
- [5, 10], [5, 10], [5, 10], [5, 10], // 00111xxxx
- [5, 10], [5, 10], [5, 10], [5, 10],
- [5, 10], [5, 10], [5, 10], [5, 10],
- [5, 10], [5, 10], [5, 10], [5, 10],
- [5, 11], [5, 11], [5, 11], [5, 11], // 01000xxxx
- [5, 11], [5, 11], [5, 11], [5, 11],
- [5, 11], [5, 11], [5, 11], [5, 11],
- [5, 11], [5, 11], [5, 11], [5, 11],
- [7, 27], [7, 27], [7, 27], [7, 27], // 0100100xx
- [8, 59], [8, 59], // 01001010x
- [8, 60], [8, 60], // 01001011x
- [9, 1472], // 010011000
- [9, 1536], // 010011001
- [9, 1600], // 010011010
- [9, 1728], // 010011011
- [7, 18], [7, 18], [7, 18], [7, 18], // 0100111xx
- [7, 24], [7, 24], [7, 24], [7, 24], // 0101000xx
- [8, 49], [8, 49], // 01010010x
- [8, 50], [8, 50], // 01010011x
- [8, 51], [8, 51], // 01010100x
- [8, 52], [8, 52], // 01010101x
- [7, 25], [7, 25], [7, 25], [7, 25], // 0101011xx
- [8, 55], [8, 55], // 01011000x
- [8, 56], [8, 56], // 01011001x
- [8, 57], [8, 57], // 01011010x
- [8, 58], [8, 58], // 01011011x
- [6, 192], [6, 192], [6, 192], [6, 192], // 010111xxx
- [6, 192], [6, 192], [6, 192], [6, 192],
- [6, 1664], [6, 1664], [6, 1664], [6, 1664], // 011000xxx
- [6, 1664], [6, 1664], [6, 1664], [6, 1664],
- [8, 448], [8, 448], // 01100100x
- [8, 512], [8, 512], // 01100101x
- [9, 704], // 011001100
- [9, 768], // 011001101
- [8, 640], [8, 640], // 01100111x
- [8, 576], [8, 576], // 01101000x
- [9, 832], // 011010010
- [9, 896], // 011010011
- [9, 960], // 011010100
- [9, 1024], // 011010101
- [9, 1088], // 011010110
- [9, 1152], // 011010111
- [9, 1216], // 011011000
- [9, 1280], // 011011001
- [9, 1344], // 011011010
- [9, 1408], // 011011011
- [7, 256], [7, 256], [7, 256], [7, 256], // 0110111xx
- [4, 2], [4, 2], [4, 2], [4, 2], // 0111xxxxx
- [4, 2], [4, 2], [4, 2], [4, 2],
- [4, 2], [4, 2], [4, 2], [4, 2],
- [4, 2], [4, 2], [4, 2], [4, 2],
- [4, 2], [4, 2], [4, 2], [4, 2],
- [4, 2], [4, 2], [4, 2], [4, 2],
- [4, 2], [4, 2], [4, 2], [4, 2],
- [4, 2], [4, 2], [4, 2], [4, 2],
- [4, 3], [4, 3], [4, 3], [4, 3], // 1000xxxxx
- [4, 3], [4, 3], [4, 3], [4, 3],
- [4, 3], [4, 3], [4, 3], [4, 3],
- [4, 3], [4, 3], [4, 3], [4, 3],
- [4, 3], [4, 3], [4, 3], [4, 3],
- [4, 3], [4, 3], [4, 3], [4, 3],
- [4, 3], [4, 3], [4, 3], [4, 3],
- [4, 3], [4, 3], [4, 3], [4, 3],
- [5, 128], [5, 128], [5, 128], [5, 128], // 10010xxxx
- [5, 128], [5, 128], [5, 128], [5, 128],
- [5, 128], [5, 128], [5, 128], [5, 128],
- [5, 128], [5, 128], [5, 128], [5, 128],
- [5, 8], [5, 8], [5, 8], [5, 8], // 10011xxxx
- [5, 8], [5, 8], [5, 8], [5, 8],
- [5, 8], [5, 8], [5, 8], [5, 8],
- [5, 8], [5, 8], [5, 8], [5, 8],
- [5, 9], [5, 9], [5, 9], [5, 9], // 10100xxxx
- [5, 9], [5, 9], [5, 9], [5, 9],
- [5, 9], [5, 9], [5, 9], [5, 9],
- [5, 9], [5, 9], [5, 9], [5, 9],
- [6, 16], [6, 16], [6, 16], [6, 16], // 101010xxx
- [6, 16], [6, 16], [6, 16], [6, 16],
- [6, 17], [6, 17], [6, 17], [6, 17], // 101011xxx
- [6, 17], [6, 17], [6, 17], [6, 17],
- [4, 4], [4, 4], [4, 4], [4, 4], // 1011xxxxx
- [4, 4], [4, 4], [4, 4], [4, 4],
- [4, 4], [4, 4], [4, 4], [4, 4],
- [4, 4], [4, 4], [4, 4], [4, 4],
- [4, 4], [4, 4], [4, 4], [4, 4],
- [4, 4], [4, 4], [4, 4], [4, 4],
- [4, 4], [4, 4], [4, 4], [4, 4],
- [4, 4], [4, 4], [4, 4], [4, 4],
- [4, 5], [4, 5], [4, 5], [4, 5], // 1100xxxxx
- [4, 5], [4, 5], [4, 5], [4, 5],
- [4, 5], [4, 5], [4, 5], [4, 5],
- [4, 5], [4, 5], [4, 5], [4, 5],
- [4, 5], [4, 5], [4, 5], [4, 5],
- [4, 5], [4, 5], [4, 5], [4, 5],
- [4, 5], [4, 5], [4, 5], [4, 5],
- [4, 5], [4, 5], [4, 5], [4, 5],
- [6, 14], [6, 14], [6, 14], [6, 14], // 110100xxx
- [6, 14], [6, 14], [6, 14], [6, 14],
- [6, 15], [6, 15], [6, 15], [6, 15], // 110101xxx
- [6, 15], [6, 15], [6, 15], [6, 15],
- [5, 64], [5, 64], [5, 64], [5, 64], // 11011xxxx
- [5, 64], [5, 64], [5, 64], [5, 64],
- [5, 64], [5, 64], [5, 64], [5, 64],
- [5, 64], [5, 64], [5, 64], [5, 64],
- [4, 6], [4, 6], [4, 6], [4, 6], // 1110xxxxx
- [4, 6], [4, 6], [4, 6], [4, 6],
- [4, 6], [4, 6], [4, 6], [4, 6],
- [4, 6], [4, 6], [4, 6], [4, 6],
- [4, 6], [4, 6], [4, 6], [4, 6],
- [4, 6], [4, 6], [4, 6], [4, 6],
- [4, 6], [4, 6], [4, 6], [4, 6],
- [4, 6], [4, 6], [4, 6], [4, 6],
- [4, 7], [4, 7], [4, 7], [4, 7], // 1111xxxxx
- [4, 7], [4, 7], [4, 7], [4, 7],
- [4, 7], [4, 7], [4, 7], [4, 7],
- [4, 7], [4, 7], [4, 7], [4, 7],
- [4, 7], [4, 7], [4, 7], [4, 7],
- [4, 7], [4, 7], [4, 7], [4, 7],
- [4, 7], [4, 7], [4, 7], [4, 7],
- [4, 7], [4, 7], [4, 7], [4, 7]
- ];
-
- var blackTable1 = [
- [-1, -1], [-1, -1], // 000000000000x
- [12, ccittEOL], [12, ccittEOL], // 000000000001x
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000001xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000010xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000011xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000100xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000101xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000110xx
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000111xx
- [11, 1792], [11, 1792], [11, 1792], [11, 1792], // 00000001000xx
- [12, 1984], [12, 1984], // 000000010010x
- [12, 2048], [12, 2048], // 000000010011x
- [12, 2112], [12, 2112], // 000000010100x
- [12, 2176], [12, 2176], // 000000010101x
- [12, 2240], [12, 2240], // 000000010110x
- [12, 2304], [12, 2304], // 000000010111x
- [11, 1856], [11, 1856], [11, 1856], [11, 1856], // 00000001100xx
- [11, 1920], [11, 1920], [11, 1920], [11, 1920], // 00000001101xx
- [12, 2368], [12, 2368], // 000000011100x
- [12, 2432], [12, 2432], // 000000011101x
- [12, 2496], [12, 2496], // 000000011110x
- [12, 2560], [12, 2560], // 000000011111x
- [10, 18], [10, 18], [10, 18], [10, 18], // 0000001000xxx
- [10, 18], [10, 18], [10, 18], [10, 18],
- [12, 52], [12, 52], // 000000100100x
- [13, 640], // 0000001001010
- [13, 704], // 0000001001011
- [13, 768], // 0000001001100
- [13, 832], // 0000001001101
- [12, 55], [12, 55], // 000000100111x
- [12, 56], [12, 56], // 000000101000x
- [13, 1280], // 0000001010010
- [13, 1344], // 0000001010011
- [13, 1408], // 0000001010100
- [13, 1472], // 0000001010101
- [12, 59], [12, 59], // 000000101011x
- [12, 60], [12, 60], // 000000101100x
- [13, 1536], // 0000001011010
- [13, 1600], // 0000001011011
- [11, 24], [11, 24], [11, 24], [11, 24], // 00000010111xx
- [11, 25], [11, 25], [11, 25], [11, 25], // 00000011000xx
- [13, 1664], // 0000001100100
- [13, 1728], // 0000001100101
- [12, 320], [12, 320], // 000000110011x
- [12, 384], [12, 384], // 000000110100x
- [12, 448], [12, 448], // 000000110101x
- [13, 512], // 0000001101100
- [13, 576], // 0000001101101
- [12, 53], [12, 53], // 000000110111x
- [12, 54], [12, 54], // 000000111000x
- [13, 896], // 0000001110010
- [13, 960], // 0000001110011
- [13, 1024], // 0000001110100
- [13, 1088], // 0000001110101
- [13, 1152], // 0000001110110
- [13, 1216], // 0000001110111
- [10, 64], [10, 64], [10, 64], [10, 64], // 0000001111xxx
- [10, 64], [10, 64], [10, 64], [10, 64]
- ];
-
- var blackTable2 = [
- [8, 13], [8, 13], [8, 13], [8, 13], // 00000100xxxx
- [8, 13], [8, 13], [8, 13], [8, 13],
- [8, 13], [8, 13], [8, 13], [8, 13],
- [8, 13], [8, 13], [8, 13], [8, 13],
- [11, 23], [11, 23], // 00000101000x
- [12, 50], // 000001010010
- [12, 51], // 000001010011
- [12, 44], // 000001010100
- [12, 45], // 000001010101
- [12, 46], // 000001010110
- [12, 47], // 000001010111
- [12, 57], // 000001011000
- [12, 58], // 000001011001
- [12, 61], // 000001011010
- [12, 256], // 000001011011
- [10, 16], [10, 16], [10, 16], [10, 16], // 0000010111xx
- [10, 17], [10, 17], [10, 17], [10, 17], // 0000011000xx
- [12, 48], // 000001100100
- [12, 49], // 000001100101
- [12, 62], // 000001100110
- [12, 63], // 000001100111
- [12, 30], // 000001101000
- [12, 31], // 000001101001
- [12, 32], // 000001101010
- [12, 33], // 000001101011
- [12, 40], // 000001101100
- [12, 41], // 000001101101
- [11, 22], [11, 22], // 00000110111x
- [8, 14], [8, 14], [8, 14], [8, 14], // 00000111xxxx
- [8, 14], [8, 14], [8, 14], [8, 14],
- [8, 14], [8, 14], [8, 14], [8, 14],
- [8, 14], [8, 14], [8, 14], [8, 14],
- [7, 10], [7, 10], [7, 10], [7, 10], // 0000100xxxxx
- [7, 10], [7, 10], [7, 10], [7, 10],
- [7, 10], [7, 10], [7, 10], [7, 10],
- [7, 10], [7, 10], [7, 10], [7, 10],
- [7, 10], [7, 10], [7, 10], [7, 10],
- [7, 10], [7, 10], [7, 10], [7, 10],
- [7, 10], [7, 10], [7, 10], [7, 10],
- [7, 10], [7, 10], [7, 10], [7, 10],
- [7, 11], [7, 11], [7, 11], [7, 11], // 0000101xxxxx
- [7, 11], [7, 11], [7, 11], [7, 11],
- [7, 11], [7, 11], [7, 11], [7, 11],
- [7, 11], [7, 11], [7, 11], [7, 11],
- [7, 11], [7, 11], [7, 11], [7, 11],
- [7, 11], [7, 11], [7, 11], [7, 11],
- [7, 11], [7, 11], [7, 11], [7, 11],
- [7, 11], [7, 11], [7, 11], [7, 11],
- [9, 15], [9, 15], [9, 15], [9, 15], // 000011000xxx
- [9, 15], [9, 15], [9, 15], [9, 15],
- [12, 128], // 000011001000
- [12, 192], // 000011001001
- [12, 26], // 000011001010
- [12, 27], // 000011001011
- [12, 28], // 000011001100
- [12, 29], // 000011001101
- [11, 19], [11, 19], // 00001100111x
- [11, 20], [11, 20], // 00001101000x
- [12, 34], // 000011010010
- [12, 35], // 000011010011
- [12, 36], // 000011010100
- [12, 37], // 000011010101
- [12, 38], // 000011010110
- [12, 39], // 000011010111
- [11, 21], [11, 21], // 00001101100x
- [12, 42], // 000011011010
- [12, 43], // 000011011011
- [10, 0], [10, 0], [10, 0], [10, 0], // 0000110111xx
- [7, 12], [7, 12], [7, 12], [7, 12], // 0000111xxxxx
- [7, 12], [7, 12], [7, 12], [7, 12],
- [7, 12], [7, 12], [7, 12], [7, 12],
- [7, 12], [7, 12], [7, 12], [7, 12],
- [7, 12], [7, 12], [7, 12], [7, 12],
- [7, 12], [7, 12], [7, 12], [7, 12],
- [7, 12], [7, 12], [7, 12], [7, 12],
- [7, 12], [7, 12], [7, 12], [7, 12]
- ];
-
- var blackTable3 = [
- [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000xx
- [6, 9], // 000100
- [6, 8], // 000101
- [5, 7], [5, 7], // 00011x
- [4, 6], [4, 6], [4, 6], [4, 6], // 0010xx
- [4, 5], [4, 5], [4, 5], [4, 5], // 0011xx
- [3, 1], [3, 1], [3, 1], [3, 1], // 010xxx
- [3, 1], [3, 1], [3, 1], [3, 1],
- [3, 4], [3, 4], [3, 4], [3, 4], // 011xxx
- [3, 4], [3, 4], [3, 4], [3, 4],
- [2, 3], [2, 3], [2, 3], [2, 3], // 10xxxx
- [2, 3], [2, 3], [2, 3], [2, 3],
- [2, 3], [2, 3], [2, 3], [2, 3],
- [2, 3], [2, 3], [2, 3], [2, 3],
- [2, 2], [2, 2], [2, 2], [2, 2], // 11xxxx
- [2, 2], [2, 2], [2, 2], [2, 2],
- [2, 2], [2, 2], [2, 2], [2, 2],
- [2, 2], [2, 2], [2, 2], [2, 2]
- ];
-
- function CCITTFaxStream(str, maybeLength, params) {
- this.str = str;
- this.dict = str.dict;
-
- if (!isDict(params)) {
- params = Dict.empty;
- }
- this.encoding = params.get('K') || 0;
- this.eoline = params.get('EndOfLine') || false;
- this.byteAlign = params.get('EncodedByteAlign') || false;
- this.columns = params.get('Columns') || 1728;
- this.rows = params.get('Rows') || 0;
- var eoblock = params.get('EndOfBlock');
- if (eoblock === null || eoblock === undefined) {
- eoblock = true;
- }
- this.eoblock = eoblock;
- this.black = params.get('BlackIs1') || false;
-
- this.codingLine = new Uint32Array(this.columns + 1);
- this.refLine = new Uint32Array(this.columns + 2);
-
- this.codingLine[0] = this.columns;
- this.codingPos = 0;
-
- this.row = 0;
- this.nextLine2D = this.encoding < 0;
- this.inputBits = 0;
- this.inputBuf = 0;
- this.outputBits = 0;
- this.rowsDone = false;
-
- var code1;
- while ((code1 = this.lookBits(12)) === 0) {
- this.eatBits(1);
- }
- if (code1 === 1) {
- this.eatBits(12);
- }
- if (this.encoding > 0) {
- this.nextLine2D = !this.lookBits(1);
- this.eatBits(1);
- }
-
- DecodeStream.call(this, maybeLength);
- }
-
- CCITTFaxStream.prototype = Object.create(DecodeStream.prototype);
-
- CCITTFaxStream.prototype.readBlock = function CCITTFaxStream_readBlock() {
- while (!this.eof) {
- var c = this.lookChar();
- this.ensureBuffer(this.bufferLength + 1);
- this.buffer[this.bufferLength++] = c;
- }
- };
-
- CCITTFaxStream.prototype.addPixels =
- function ccittFaxStreamAddPixels(a1, blackPixels) {
- var codingLine = this.codingLine;
- var codingPos = this.codingPos;
-
- if (a1 > codingLine[codingPos]) {
- if (a1 > this.columns) {
- info('row is wrong length');
- this.err = true;
- a1 = this.columns;
- }
- if ((codingPos & 1) ^ blackPixels) {
- ++codingPos;
- }
-
- codingLine[codingPos] = a1;
- }
- this.codingPos = codingPos;
- };
-
- CCITTFaxStream.prototype.addPixelsNeg =
- function ccittFaxStreamAddPixelsNeg(a1, blackPixels) {
- var codingLine = this.codingLine;
- var codingPos = this.codingPos;
-
- if (a1 > codingLine[codingPos]) {
- if (a1 > this.columns) {
- info('row is wrong length');
- this.err = true;
- a1 = this.columns;
- }
- if ((codingPos & 1) ^ blackPixels) {
- ++codingPos;
- }
-
- codingLine[codingPos] = a1;
- } else if (a1 < codingLine[codingPos]) {
- if (a1 < 0) {
- info('invalid code');
- this.err = true;
- a1 = 0;
- }
- while (codingPos > 0 && a1 < codingLine[codingPos - 1]) {
- --codingPos;
- }
- codingLine[codingPos] = a1;
- }
-
- this.codingPos = codingPos;
- };
-
- CCITTFaxStream.prototype.lookChar = function CCITTFaxStream_lookChar() {
- var refLine = this.refLine;
- var codingLine = this.codingLine;
- var columns = this.columns;
-
- var refPos, blackPixels, bits, i;
-
- if (this.outputBits === 0) {
- if (this.rowsDone) {
- this.eof = true;
- }
- if (this.eof) {
- return null;
- }
- this.err = false;
-
- var code1, code2, code3;
- if (this.nextLine2D) {
- for (i = 0; codingLine[i] < columns; ++i) {
- refLine[i] = codingLine[i];
- }
- refLine[i++] = columns;
- refLine[i] = columns;
- codingLine[0] = 0;
- this.codingPos = 0;
- refPos = 0;
- blackPixels = 0;
-
- while (codingLine[this.codingPos] < columns) {
- code1 = this.getTwoDimCode();
- switch (code1) {
- case twoDimPass:
- this.addPixels(refLine[refPos + 1], blackPixels);
- if (refLine[refPos + 1] < columns) {
- refPos += 2;
- }
- break;
- case twoDimHoriz:
- code1 = code2 = 0;
- if (blackPixels) {
- do {
- code1 += (code3 = this.getBlackCode());
- } while (code3 >= 64);
- do {
- code2 += (code3 = this.getWhiteCode());
- } while (code3 >= 64);
- } else {
- do {
- code1 += (code3 = this.getWhiteCode());
- } while (code3 >= 64);
- do {
- code2 += (code3 = this.getBlackCode());
- } while (code3 >= 64);
- }
- this.addPixels(codingLine[this.codingPos] +
- code1, blackPixels);
- if (codingLine[this.codingPos] < columns) {
- this.addPixels(codingLine[this.codingPos] + code2,
- blackPixels ^ 1);
- }
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- break;
- case twoDimVertR3:
- this.addPixels(refLine[refPos] + 3, blackPixels);
- blackPixels ^= 1;
- if (codingLine[this.codingPos] < columns) {
- ++refPos;
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- }
- break;
- case twoDimVertR2:
- this.addPixels(refLine[refPos] + 2, blackPixels);
- blackPixels ^= 1;
- if (codingLine[this.codingPos] < columns) {
- ++refPos;
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- }
- break;
- case twoDimVertR1:
- this.addPixels(refLine[refPos] + 1, blackPixels);
- blackPixels ^= 1;
- if (codingLine[this.codingPos] < columns) {
- ++refPos;
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- }
- break;
- case twoDimVert0:
- this.addPixels(refLine[refPos], blackPixels);
- blackPixels ^= 1;
- if (codingLine[this.codingPos] < columns) {
- ++refPos;
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- }
- break;
- case twoDimVertL3:
- this.addPixelsNeg(refLine[refPos] - 3, blackPixels);
- blackPixels ^= 1;
- if (codingLine[this.codingPos] < columns) {
- if (refPos > 0) {
- --refPos;
- } else {
- ++refPos;
- }
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- }
- break;
- case twoDimVertL2:
- this.addPixelsNeg(refLine[refPos] - 2, blackPixels);
- blackPixels ^= 1;
- if (codingLine[this.codingPos] < columns) {
- if (refPos > 0) {
- --refPos;
- } else {
- ++refPos;
- }
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- }
- break;
- case twoDimVertL1:
- this.addPixelsNeg(refLine[refPos] - 1, blackPixels);
- blackPixels ^= 1;
- if (codingLine[this.codingPos] < columns) {
- if (refPos > 0) {
- --refPos;
- } else {
- ++refPos;
- }
- while (refLine[refPos] <= codingLine[this.codingPos] &&
- refLine[refPos] < columns) {
- refPos += 2;
- }
- }
- break;
- case ccittEOF:
- this.addPixels(columns, 0);
- this.eof = true;
- break;
- default:
- info('bad 2d code');
- this.addPixels(columns, 0);
- this.err = true;
- }
- }
- } else {
- codingLine[0] = 0;
- this.codingPos = 0;
- blackPixels = 0;
- while (codingLine[this.codingPos] < columns) {
- code1 = 0;
- if (blackPixels) {
- do {
- code1 += (code3 = this.getBlackCode());
- } while (code3 >= 64);
- } else {
- do {
- code1 += (code3 = this.getWhiteCode());
- } while (code3 >= 64);
- }
- this.addPixels(codingLine[this.codingPos] + code1, blackPixels);
- blackPixels ^= 1;
- }
- }
-
- var gotEOL = false;
-
- if (this.byteAlign) {
- this.inputBits &= ~7;
- }
-
- if (!this.eoblock && this.row === this.rows - 1) {
- this.rowsDone = true;
- } else {
- code1 = this.lookBits(12);
- if (this.eoline) {
- while (code1 !== ccittEOF && code1 !== 1) {
- this.eatBits(1);
- code1 = this.lookBits(12);
- }
- } else {
- while (code1 === 0) {
- this.eatBits(1);
- code1 = this.lookBits(12);
- }
- }
- if (code1 === 1) {
- this.eatBits(12);
- gotEOL = true;
- } else if (code1 === ccittEOF) {
- this.eof = true;
- }
- }
-
- if (!this.eof && this.encoding > 0 && !this.rowsDone) {
- this.nextLine2D = !this.lookBits(1);
- this.eatBits(1);
- }
-
- if (this.eoblock && gotEOL && this.byteAlign) {
- code1 = this.lookBits(12);
- if (code1 === 1) {
- this.eatBits(12);
- if (this.encoding > 0) {
- this.lookBits(1);
- this.eatBits(1);
- }
- if (this.encoding >= 0) {
- for (i = 0; i < 4; ++i) {
- code1 = this.lookBits(12);
- if (code1 !== 1) {
- info('bad rtc code: ' + code1);
- }
- this.eatBits(12);
- if (this.encoding > 0) {
- this.lookBits(1);
- this.eatBits(1);
- }
- }
- }
- this.eof = true;
- }
- } else if (this.err && this.eoline) {
- while (true) {
- code1 = this.lookBits(13);
- if (code1 === ccittEOF) {
- this.eof = true;
- return null;
- }
- if ((code1 >> 1) === 1) {
- break;
- }
- this.eatBits(1);
- }
- this.eatBits(12);
- if (this.encoding > 0) {
- this.eatBits(1);
- this.nextLine2D = !(code1 & 1);
- }
- }
-
- if (codingLine[0] > 0) {
- this.outputBits = codingLine[this.codingPos = 0];
- } else {
- this.outputBits = codingLine[this.codingPos = 1];
- }
- this.row++;
- }
-
- var c;
- if (this.outputBits >= 8) {
- c = (this.codingPos & 1) ? 0 : 0xFF;
- this.outputBits -= 8;
- if (this.outputBits === 0 && codingLine[this.codingPos] < columns) {
- this.codingPos++;
- this.outputBits = (codingLine[this.codingPos] -
- codingLine[this.codingPos - 1]);
- }
- } else {
- bits = 8;
- c = 0;
- do {
- if (this.outputBits > bits) {
- c <<= bits;
- if (!(this.codingPos & 1)) {
- c |= 0xFF >> (8 - bits);
- }
- this.outputBits -= bits;
- bits = 0;
- } else {
- c <<= this.outputBits;
- if (!(this.codingPos & 1)) {
- c |= 0xFF >> (8 - this.outputBits);
- }
- bits -= this.outputBits;
- this.outputBits = 0;
- if (codingLine[this.codingPos] < columns) {
- this.codingPos++;
- this.outputBits = (codingLine[this.codingPos] -
- codingLine[this.codingPos - 1]);
- } else if (bits > 0) {
- c <<= bits;
- bits = 0;
- }
- }
- } while (bits);
- }
- if (this.black) {
- c ^= 0xFF;
- }
- return c;
- };
-
- // This functions returns the code found from the table.
- // The start and end parameters set the boundaries for searching the table.
- // The limit parameter is optional. Function returns an array with three
- // values. The first array element indicates whether a valid code is being
- // returned. The second array element is the actual code. The third array
- // element indicates whether EOF was reached.
- CCITTFaxStream.prototype.findTableCode =
- function ccittFaxStreamFindTableCode(start, end, table, limit) {
-
- var limitValue = limit || 0;
- for (var i = start; i <= end; ++i) {
- var code = this.lookBits(i);
- if (code === ccittEOF) {
- return [true, 1, false];
- }
- if (i < end) {
- code <<= end - i;
- }
- if (!limitValue || code >= limitValue) {
- var p = table[code - limitValue];
- if (p[0] === i) {
- this.eatBits(i);
- return [true, p[1], true];
- }
- }
- }
- return [false, 0, false];
- };
-
- CCITTFaxStream.prototype.getTwoDimCode =
- function ccittFaxStreamGetTwoDimCode() {
-
- var code = 0;
- var p;
- if (this.eoblock) {
- code = this.lookBits(7);
- p = twoDimTable[code];
- if (p && p[0] > 0) {
- this.eatBits(p[0]);
- return p[1];
- }
- } else {
- var result = this.findTableCode(1, 7, twoDimTable);
- if (result[0] && result[2]) {
- return result[1];
- }
- }
- info('Bad two dim code');
- return ccittEOF;
- };
-
- CCITTFaxStream.prototype.getWhiteCode =
- function ccittFaxStreamGetWhiteCode() {
-
- var code = 0;
- var p;
- if (this.eoblock) {
- code = this.lookBits(12);
- if (code === ccittEOF) {
- return 1;
- }
-
- if ((code >> 5) === 0) {
- p = whiteTable1[code];
- } else {
- p = whiteTable2[code >> 3];
- }
-
- if (p[0] > 0) {
- this.eatBits(p[0]);
- return p[1];
- }
- } else {
- var result = this.findTableCode(1, 9, whiteTable2);
- if (result[0]) {
- return result[1];
- }
-
- result = this.findTableCode(11, 12, whiteTable1);
- if (result[0]) {
- return result[1];
- }
- }
- info('bad white code');
- this.eatBits(1);
- return 1;
- };
-
- CCITTFaxStream.prototype.getBlackCode =
- function ccittFaxStreamGetBlackCode() {
-
- var code, p;
- if (this.eoblock) {
- code = this.lookBits(13);
- if (code === ccittEOF) {
- return 1;
- }
- if ((code >> 7) === 0) {
- p = blackTable1[code];
- } else if ((code >> 9) === 0 && (code >> 7) !== 0) {
- p = blackTable2[(code >> 1) - 64];
- } else {
- p = blackTable3[code >> 7];
- }
-
- if (p[0] > 0) {
- this.eatBits(p[0]);
- return p[1];
- }
- } else {
- var result = this.findTableCode(2, 6, blackTable3);
- if (result[0]) {
- return result[1];
- }
-
- result = this.findTableCode(7, 12, blackTable2, 64);
- if (result[0]) {
- return result[1];
- }
-
- result = this.findTableCode(10, 13, blackTable1);
- if (result[0]) {
- return result[1];
- }
- }
- info('bad black code');
- this.eatBits(1);
- return 1;
- };
-
- CCITTFaxStream.prototype.lookBits = function CCITTFaxStream_lookBits(n) {
- var c;
- while (this.inputBits < n) {
- if ((c = this.str.getByte()) === -1) {
- if (this.inputBits === 0) {
- return ccittEOF;
- }
- return ((this.inputBuf << (n - this.inputBits)) &
- (0xFFFF >> (16 - n)));
- }
- this.inputBuf = (this.inputBuf << 8) | c;
- this.inputBits += 8;
- }
- return (this.inputBuf >> (this.inputBits - n)) & (0xFFFF >> (16 - n));
- };
-
- CCITTFaxStream.prototype.eatBits = function CCITTFaxStream_eatBits(n) {
- if ((this.inputBits -= n) < 0) {
- this.inputBits = 0;
- }
- };
-
- return CCITTFaxStream;
-})();
-
var LZWStream = (function LZWStreamClosure() {
function LZWStream(str, maybeLength, earlyChange) {
this.str = str;
@@ -2476,11 +1415,9 @@ var NullStream = (function NullStreamClosure() {
export {
Ascii85Stream,
AsciiHexStream,
- CCITTFaxStream,
DecryptStream,
DecodeStream,
FlateStream,
- Jbig2Stream,
JpegStream,
JpxStream,
NullStream,