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Unified Diff: core/src/fxcodec/codec/fx_codec_fax.cpp

Issue 1800523005: Move core/src/ up to core/. (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master
Patch Set: Created 4 years, 9 months ago
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Index: core/src/fxcodec/codec/fx_codec_fax.cpp
diff --git a/core/src/fxcodec/codec/fx_codec_fax.cpp b/core/src/fxcodec/codec/fx_codec_fax.cpp
deleted file mode 100644
index 36b92f06ffbb3f597a299fb592e74b7d903e39fb..0000000000000000000000000000000000000000
--- a/core/src/fxcodec/codec/fx_codec_fax.cpp
+++ /dev/null
@@ -1,830 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "core/include/fxcodec/fx_codec.h"
-#include "core/src/fxcodec/codec/codec_int.h"
-
-namespace {
-
-const uint8_t OneLeadPos[256] = {
- 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-};
-const uint8_t ZeroLeadPos[256] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8,
-};
-
-int FindBit(const uint8_t* data_buf, int max_pos, int start_pos, int bit) {
- if (start_pos >= max_pos) {
- return max_pos;
- }
- const uint8_t* leading_pos = bit ? OneLeadPos : ZeroLeadPos;
- if (start_pos % 8) {
- uint8_t data = data_buf[start_pos / 8];
- if (bit) {
- data &= 0xff >> (start_pos % 8);
- } else {
- data |= 0xff << (8 - start_pos % 8);
- }
- if (leading_pos[data] < 8) {
- return start_pos / 8 * 8 + leading_pos[data];
- }
- start_pos += 7;
- }
- uint8_t skip = bit ? 0x00 : 0xff;
- int byte_pos = start_pos / 8;
- int max_byte = (max_pos + 7) / 8;
- while (byte_pos < max_byte) {
- if (data_buf[byte_pos] != skip) {
- break;
- }
- byte_pos++;
- }
- if (byte_pos == max_byte) {
- return max_pos;
- }
- int pos = leading_pos[data_buf[byte_pos]] + byte_pos * 8;
- if (pos > max_pos) {
- pos = max_pos;
- }
- return pos;
-}
-
-void FaxG4FindB1B2(const uint8_t* ref_buf,
- int columns,
- int a0,
- bool a0color,
- int& b1,
- int& b2) {
- uint8_t first_bit =
- (a0 < 0) ? 1 : ((ref_buf[a0 / 8] & (1 << (7 - a0 % 8))) != 0);
- b1 = FindBit(ref_buf, columns, a0 + 1, !first_bit);
- if (b1 >= columns) {
- b1 = b2 = columns;
- return;
- }
- if (first_bit == !a0color) {
- b1 = FindBit(ref_buf, columns, b1 + 1, first_bit);
- first_bit = !first_bit;
- }
- if (b1 >= columns) {
- b1 = b2 = columns;
- return;
- }
- b2 = FindBit(ref_buf, columns, b1 + 1, first_bit);
-}
-
-void FaxFillBits(uint8_t* dest_buf, int columns, int startpos, int endpos) {
- if (startpos < 0) {
- startpos = 0;
- }
- if (endpos < 0) {
- endpos = 0;
- }
- if (endpos >= columns) {
- endpos = columns;
- }
- if (startpos >= endpos) {
- return;
- }
- int first_byte = startpos / 8;
- int last_byte = (endpos - 1) / 8;
- if (first_byte == last_byte) {
- for (int i = startpos % 8; i <= (endpos - 1) % 8; i++) {
- dest_buf[first_byte] -= 1 << (7 - i);
- }
- return;
- }
- int i;
- for (i = startpos % 8; i < 8; i++) {
- dest_buf[first_byte] -= 1 << (7 - i);
- }
- for (i = 0; i <= (endpos - 1) % 8; i++) {
- dest_buf[last_byte] -= 1 << (7 - i);
- }
- if (last_byte > first_byte + 1) {
- FXSYS_memset(dest_buf + first_byte + 1, 0, last_byte - first_byte - 1);
- }
-}
-
-#define NEXTBIT \
- src_buf[bitpos / 8] & (1 << (7 - bitpos % 8)); \
- bitpos++;
-#define ADDBIT(code, bit) \
- code = code << 1; \
- if (bit) \
- code++;
-#define GETBIT(bitpos) src_buf[bitpos / 8] & (1 << (7 - bitpos % 8))
-
-const uint8_t FaxBlackRunIns[] = {
- 0, 2, 0x02, 3, 0, 0x03,
- 2, 0, 2, 0x02, 1, 0,
- 0x03, 4, 0, 2, 0x02, 6,
- 0, 0x03, 5, 0, 1, 0x03,
- 7, 0, 2, 0x04, 9, 0,
- 0x05, 8, 0, 3, 0x04, 10,
- 0, 0x05, 11, 0, 0x07, 12,
- 0, 2, 0x04, 13, 0, 0x07,
- 14, 0, 1, 0x18, 15, 0,
- 5, 0x08, 18, 0, 0x0f, 64,
- 0, 0x17, 16, 0, 0x18, 17,
- 0, 0x37, 0, 0, 10, 0x08,
- 0x00, 0x07, 0x0c, 0x40, 0x07, 0x0d,
- 0x80, 0x07, 0x17, 24, 0, 0x18,
- 25, 0, 0x28, 23, 0, 0x37,
- 22, 0, 0x67, 19, 0, 0x68,
- 20, 0, 0x6c, 21, 0, 54,
- 0x12, 1984 % 256, 1984 / 256, 0x13, 2048 % 256, 2048 / 256,
- 0x14, 2112 % 256, 2112 / 256, 0x15, 2176 % 256, 2176 / 256,
- 0x16, 2240 % 256, 2240 / 256, 0x17, 2304 % 256, 2304 / 256,
- 0x1c, 2368 % 256, 2368 / 256, 0x1d, 2432 % 256, 2432 / 256,
- 0x1e, 2496 % 256, 2496 / 256, 0x1f, 2560 % 256, 2560 / 256,
- 0x24, 52, 0, 0x27, 55, 0,
- 0x28, 56, 0, 0x2b, 59, 0,
- 0x2c, 60, 0, 0x33, 320 % 256, 320 / 256,
- 0x34, 384 % 256, 384 / 256, 0x35, 448 % 256, 448 / 256,
- 0x37, 53, 0, 0x38, 54, 0,
- 0x52, 50, 0, 0x53, 51, 0,
- 0x54, 44, 0, 0x55, 45, 0,
- 0x56, 46, 0, 0x57, 47, 0,
- 0x58, 57, 0, 0x59, 58, 0,
- 0x5a, 61, 0, 0x5b, 256 % 256, 256 / 256,
- 0x64, 48, 0, 0x65, 49, 0,
- 0x66, 62, 0, 0x67, 63, 0,
- 0x68, 30, 0, 0x69, 31, 0,
- 0x6a, 32, 0, 0x6b, 33, 0,
- 0x6c, 40, 0, 0x6d, 41, 0,
- 0xc8, 128, 0, 0xc9, 192, 0,
- 0xca, 26, 0, 0xcb, 27, 0,
- 0xcc, 28, 0, 0xcd, 29, 0,
- 0xd2, 34, 0, 0xd3, 35, 0,
- 0xd4, 36, 0, 0xd5, 37, 0,
- 0xd6, 38, 0, 0xd7, 39, 0,
- 0xda, 42, 0, 0xdb, 43, 0,
- 20, 0x4a, 640 % 256, 640 / 256, 0x4b, 704 % 256,
- 704 / 256, 0x4c, 768 % 256, 768 / 256, 0x4d, 832 % 256,
- 832 / 256, 0x52, 1280 % 256, 1280 / 256, 0x53, 1344 % 256,
- 1344 / 256, 0x54, 1408 % 256, 1408 / 256, 0x55, 1472 % 256,
- 1472 / 256, 0x5a, 1536 % 256, 1536 / 256, 0x5b, 1600 % 256,
- 1600 / 256, 0x64, 1664 % 256, 1664 / 256, 0x65, 1728 % 256,
- 1728 / 256, 0x6c, 512 % 256, 512 / 256, 0x6d, 576 % 256,
- 576 / 256, 0x72, 896 % 256, 896 / 256, 0x73, 960 % 256,
- 960 / 256, 0x74, 1024 % 256, 1024 / 256, 0x75, 1088 % 256,
- 1088 / 256, 0x76, 1152 % 256, 1152 / 256, 0x77, 1216 % 256,
- 1216 / 256, 0xff};
-
-const uint8_t FaxWhiteRunIns[] = {
- 0, 0, 0, 6, 0x07, 2,
- 0, 0x08, 3, 0, 0x0B, 4,
- 0, 0x0C, 5, 0, 0x0E, 6,
- 0, 0x0F, 7, 0, 6, 0x07,
- 10, 0, 0x08, 11, 0, 0x12,
- 128, 0, 0x13, 8, 0, 0x14,
- 9, 0, 0x1b, 64, 0, 9,
- 0x03, 13, 0, 0x07, 1, 0,
- 0x08, 12, 0, 0x17, 192, 0,
- 0x18, 1664 % 256, 1664 / 256, 0x2a, 16, 0,
- 0x2B, 17, 0, 0x34, 14, 0,
- 0x35, 15, 0, 12, 0x03, 22,
- 0, 0x04, 23, 0, 0x08, 20,
- 0, 0x0c, 19, 0, 0x13, 26,
- 0, 0x17, 21, 0, 0x18, 28,
- 0, 0x24, 27, 0, 0x27, 18,
- 0, 0x28, 24, 0, 0x2B, 25,
- 0, 0x37, 256 % 256, 256 / 256, 42, 0x02,
- 29, 0, 0x03, 30, 0, 0x04,
- 45, 0, 0x05, 46, 0, 0x0a,
- 47, 0, 0x0b, 48, 0, 0x12,
- 33, 0, 0x13, 34, 0, 0x14,
- 35, 0, 0x15, 36, 0, 0x16,
- 37, 0, 0x17, 38, 0, 0x1a,
- 31, 0, 0x1b, 32, 0, 0x24,
- 53, 0, 0x25, 54, 0, 0x28,
- 39, 0, 0x29, 40, 0, 0x2a,
- 41, 0, 0x2b, 42, 0, 0x2c,
- 43, 0, 0x2d, 44, 0, 0x32,
- 61, 0, 0x33, 62, 0, 0x34,
- 63, 0, 0x35, 0, 0, 0x36,
- 320 % 256, 320 / 256, 0x37, 384 % 256, 384 / 256, 0x4a,
- 59, 0, 0x4b, 60, 0, 0x52,
- 49, 0, 0x53, 50, 0, 0x54,
- 51, 0, 0x55, 52, 0, 0x58,
- 55, 0, 0x59, 56, 0, 0x5a,
- 57, 0, 0x5b, 58, 0, 0x64,
- 448 % 256, 448 / 256, 0x65, 512 % 256, 512 / 256, 0x67,
- 640 % 256, 640 / 256, 0x68, 576 % 256, 576 / 256, 16,
- 0x98, 1472 % 256, 1472 / 256, 0x99, 1536 % 256, 1536 / 256,
- 0x9a, 1600 % 256, 1600 / 256, 0x9b, 1728 % 256, 1728 / 256,
- 0xcc, 704 % 256, 704 / 256, 0xcd, 768 % 256, 768 / 256,
- 0xd2, 832 % 256, 832 / 256, 0xd3, 896 % 256, 896 / 256,
- 0xd4, 960 % 256, 960 / 256, 0xd5, 1024 % 256, 1024 / 256,
- 0xd6, 1088 % 256, 1088 / 256, 0xd7, 1152 % 256, 1152 / 256,
- 0xd8, 1216 % 256, 1216 / 256, 0xd9, 1280 % 256, 1280 / 256,
- 0xda, 1344 % 256, 1344 / 256, 0xdb, 1408 % 256, 1408 / 256,
- 0, 3, 0x08, 1792 % 256, 1792 / 256, 0x0c,
- 1856 % 256, 1856 / 256, 0x0d, 1920 % 256, 1920 / 256, 10,
- 0x12, 1984 % 256, 1984 / 256, 0x13, 2048 % 256, 2048 / 256,
- 0x14, 2112 % 256, 2112 / 256, 0x15, 2176 % 256, 2176 / 256,
- 0x16, 2240 % 256, 2240 / 256, 0x17, 2304 % 256, 2304 / 256,
- 0x1c, 2368 % 256, 2368 / 256, 0x1d, 2432 % 256, 2432 / 256,
- 0x1e, 2496 % 256, 2496 / 256, 0x1f, 2560 % 256, 2560 / 256,
- 0xff,
-};
-
-int FaxGetRun(const uint8_t* ins_array,
- const uint8_t* src_buf,
- int& bitpos,
- int bitsize) {
- FX_DWORD code = 0;
- int ins_off = 0;
- while (1) {
- uint8_t ins = ins_array[ins_off++];
- if (ins == 0xff) {
- return -1;
- }
- if (bitpos >= bitsize) {
- return -1;
- }
- code <<= 1;
- if (src_buf[bitpos / 8] & (1 << (7 - bitpos % 8))) {
- code++;
- }
- bitpos++;
- int next_off = ins_off + ins * 3;
- for (; ins_off < next_off; ins_off += 3) {
- if (ins_array[ins_off] == code) {
- return ins_array[ins_off + 1] + ins_array[ins_off + 2] * 256;
- }
- }
- }
-}
-
-FX_BOOL FaxG4GetRow(const uint8_t* src_buf,
- int bitsize,
- int& bitpos,
- uint8_t* dest_buf,
- const uint8_t* ref_buf,
- int columns) {
- int a0 = -1;
- bool a0color = true;
- while (1) {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- int a1, a2, b1, b2;
- FaxG4FindB1B2(ref_buf, columns, a0, a0color, b1, b2);
- FX_BOOL bit = NEXTBIT;
- int v_delta = 0;
- if (bit) {
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit1 = NEXTBIT;
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit2 = NEXTBIT;
- if (bit1 && bit2) {
- v_delta = 1;
- } else if (bit1) {
- v_delta = -1;
- } else if (bit2) {
- int run_len1 = 0;
- while (1) {
- int run = FaxGetRun(a0color ? FaxWhiteRunIns : FaxBlackRunIns,
- src_buf, bitpos, bitsize);
- run_len1 += run;
- if (run < 64) {
- break;
- }
- }
- if (a0 < 0) {
- run_len1++;
- }
- a1 = a0 + run_len1;
- if (!a0color) {
- FaxFillBits(dest_buf, columns, a0, a1);
- }
- int run_len2 = 0;
- while (1) {
- int run = FaxGetRun(a0color ? FaxBlackRunIns : FaxWhiteRunIns,
- src_buf, bitpos, bitsize);
- run_len2 += run;
- if (run < 64) {
- break;
- }
- }
- a2 = a1 + run_len2;
- if (a0color) {
- FaxFillBits(dest_buf, columns, a1, a2);
- }
- a0 = a2;
- if (a0 < columns) {
- continue;
- }
- return TRUE;
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- bit = NEXTBIT;
- if (bit) {
- if (!a0color) {
- FaxFillBits(dest_buf, columns, a0, b2);
- }
- if (b2 >= columns) {
- return TRUE;
- }
- a0 = b2;
- continue;
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit1 = NEXTBIT;
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit2 = NEXTBIT;
- if (bit1 && bit2) {
- v_delta = 2;
- } else if (bit1) {
- v_delta = -2;
- } else if (bit2) {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- bit = NEXTBIT;
- if (bit) {
- v_delta = 3;
- } else {
- v_delta = -3;
- }
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- bit = NEXTBIT;
- if (bit) {
- bitpos += 3;
- continue;
- } else {
- bitpos += 5;
- return TRUE;
- }
- }
- }
- }
- }
- a1 = b1 + v_delta;
- if (!a0color) {
- FaxFillBits(dest_buf, columns, a0, a1);
- }
- if (a1 >= columns) {
- return TRUE;
- }
- a0 = a1;
- a0color = !a0color;
- }
-}
-
-FX_BOOL FaxSkipEOL(const uint8_t* src_buf, int bitsize, int& bitpos) {
- int startbit = bitpos;
- while (bitpos < bitsize) {
- int bit = NEXTBIT;
- if (bit) {
- if (bitpos - startbit <= 11) {
- bitpos = startbit;
- }
- return TRUE;
- }
- }
- return FALSE;
-}
-
-FX_BOOL FaxGet1DLine(const uint8_t* src_buf,
- int bitsize,
- int& bitpos,
- uint8_t* dest_buf,
- int columns) {
- bool color = true;
- int startpos = 0;
- while (1) {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- int run_len = 0;
- while (1) {
- int run = FaxGetRun(color ? FaxWhiteRunIns : FaxBlackRunIns, src_buf,
- bitpos, bitsize);
- if (run < 0) {
- while (bitpos < bitsize) {
- int bit = NEXTBIT;
- if (bit) {
- return TRUE;
- }
- }
- return FALSE;
- }
- run_len += run;
- if (run < 64) {
- break;
- }
- }
- if (!color) {
- FaxFillBits(dest_buf, columns, startpos, startpos + run_len);
- }
- startpos += run_len;
- if (startpos >= columns) {
- break;
- }
- color = !color;
- }
- return TRUE;
-}
-
-const uint8_t BlackRunTerminator[128] = {
- 0x37, 10, 0x02, 3, 0x03, 2, 0x02, 2, 0x03, 3, 0x03, 4, 0x02, 4,
- 0x03, 5, 0x05, 6, 0x04, 6, 0x04, 7, 0x05, 7, 0x07, 7, 0x04, 8,
- 0x07, 8, 0x18, 9, 0x17, 10, 0x18, 10, 0x08, 10, 0x67, 11, 0x68, 11,
- 0x6c, 11, 0x37, 11, 0x28, 11, 0x17, 11, 0x18, 11, 0xca, 12, 0xcb, 12,
- 0xcc, 12, 0xcd, 12, 0x68, 12, 0x69, 12, 0x6a, 12, 0x6b, 12, 0xd2, 12,
- 0xd3, 12, 0xd4, 12, 0xd5, 12, 0xd6, 12, 0xd7, 12, 0x6c, 12, 0x6d, 12,
- 0xda, 12, 0xdb, 12, 0x54, 12, 0x55, 12, 0x56, 12, 0x57, 12, 0x64, 12,
- 0x65, 12, 0x52, 12, 0x53, 12, 0x24, 12, 0x37, 12, 0x38, 12, 0x27, 12,
- 0x28, 12, 0x58, 12, 0x59, 12, 0x2b, 12, 0x2c, 12, 0x5a, 12, 0x66, 12,
- 0x67, 12,
-};
-
-const uint8_t BlackRunMarkup[80] = {
- 0x0f, 10, 0xc8, 12, 0xc9, 12, 0x5b, 12, 0x33, 12, 0x34, 12, 0x35, 12,
- 0x6c, 13, 0x6d, 13, 0x4a, 13, 0x4b, 13, 0x4c, 13, 0x4d, 13, 0x72, 13,
- 0x73, 13, 0x74, 13, 0x75, 13, 0x76, 13, 0x77, 13, 0x52, 13, 0x53, 13,
- 0x54, 13, 0x55, 13, 0x5a, 13, 0x5b, 13, 0x64, 13, 0x65, 13, 0x08, 11,
- 0x0c, 11, 0x0d, 11, 0x12, 12, 0x13, 12, 0x14, 12, 0x15, 12, 0x16, 12,
- 0x17, 12, 0x1c, 12, 0x1d, 12, 0x1e, 12, 0x1f, 12,
-};
-
-const uint8_t WhiteRunTerminator[128] = {
- 0x35, 8, 0x07, 6, 0x07, 4, 0x08, 4, 0x0B, 4, 0x0C, 4, 0x0E, 4, 0x0F, 4,
- 0x13, 5, 0x14, 5, 0x07, 5, 0x08, 5, 0x08, 6, 0x03, 6, 0x34, 6, 0x35, 6,
- 0x2a, 6, 0x2B, 6, 0x27, 7, 0x0c, 7, 0x08, 7, 0x17, 7, 0x03, 7, 0x04, 7,
- 0x28, 7, 0x2B, 7, 0x13, 7, 0x24, 7, 0x18, 7, 0x02, 8, 0x03, 8, 0x1a, 8,
- 0x1b, 8, 0x12, 8, 0x13, 8, 0x14, 8, 0x15, 8, 0x16, 8, 0x17, 8, 0x28, 8,
- 0x29, 8, 0x2a, 8, 0x2b, 8, 0x2c, 8, 0x2d, 8, 0x04, 8, 0x05, 8, 0x0a, 8,
- 0x0b, 8, 0x52, 8, 0x53, 8, 0x54, 8, 0x55, 8, 0x24, 8, 0x25, 8, 0x58, 8,
- 0x59, 8, 0x5a, 8, 0x5b, 8, 0x4a, 8, 0x4b, 8, 0x32, 8, 0x33, 8, 0x34, 8,
-};
-
-const uint8_t WhiteRunMarkup[80] = {
- 0x1b, 5, 0x12, 5, 0x17, 6, 0x37, 7, 0x36, 8, 0x37, 8, 0x64, 8,
- 0x65, 8, 0x68, 8, 0x67, 8, 0xcc, 9, 0xcd, 9, 0xd2, 9, 0xd3, 9,
- 0xd4, 9, 0xd5, 9, 0xd6, 9, 0xd7, 9, 0xd8, 9, 0xd9, 9, 0xda, 9,
- 0xdb, 9, 0x98, 9, 0x99, 9, 0x9a, 9, 0x18, 6, 0x9b, 9, 0x08, 11,
- 0x0c, 11, 0x0d, 11, 0x12, 12, 0x13, 12, 0x14, 12, 0x15, 12, 0x16, 12,
- 0x17, 12, 0x1c, 12, 0x1d, 12, 0x1e, 12, 0x1f, 12,
-};
-
-void AddBitStream(uint8_t* dest_buf, int& dest_bitpos, int data, int bitlen) {
- for (int i = bitlen - 1; i >= 0; i--) {
- if (data & (1 << i)) {
- dest_buf[dest_bitpos / 8] |= 1 << (7 - dest_bitpos % 8);
- }
- dest_bitpos++;
- }
-}
-
-void FaxEncodeRun(uint8_t* dest_buf, int& dest_bitpos, int run, bool bWhite) {
- while (run >= 2560) {
- AddBitStream(dest_buf, dest_bitpos, 0x1f, 12);
- run -= 2560;
- }
- if (run >= 64) {
- int markup = run - run % 64;
- const uint8_t* p = bWhite ? WhiteRunMarkup : BlackRunMarkup;
- p += (markup / 64 - 1) * 2;
- AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
- }
- run %= 64;
- const uint8_t* p = bWhite ? WhiteRunTerminator : BlackRunTerminator;
- p += run * 2;
- AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
-}
-
-void FaxEncode2DLine(uint8_t* dest_buf,
- int& dest_bitpos,
- const uint8_t* src_buf,
- const uint8_t* ref_buf,
- int cols) {
- int a0 = -1;
- bool a0color = true;
- while (1) {
- int a1 = FindBit(src_buf, cols, a0 + 1, !a0color);
- int b1, b2;
- FaxG4FindB1B2(ref_buf, cols, a0, a0color, b1, b2);
- if (b2 < a1) {
- dest_bitpos += 3;
- dest_buf[dest_bitpos / 8] |= 1 << (7 - dest_bitpos % 8);
- dest_bitpos++;
- a0 = b2;
- } else if (a1 - b1 <= 3 && b1 - a1 <= 3) {
- int delta = a1 - b1;
- switch (delta) {
- case 0:
- dest_buf[dest_bitpos / 8] |= 1 << (7 - dest_bitpos % 8);
- break;
- case 1:
- case 2:
- case 3:
- dest_bitpos += delta == 1 ? 1 : delta + 2;
- dest_buf[dest_bitpos / 8] |= 1 << (7 - dest_bitpos % 8);
- dest_bitpos++;
- dest_buf[dest_bitpos / 8] |= 1 << (7 - dest_bitpos % 8);
- break;
- case -1:
- case -2:
- case -3:
- dest_bitpos += delta == -1 ? 1 : -delta + 2;
- dest_buf[dest_bitpos / 8] |= 1 << (7 - dest_bitpos % 8);
- dest_bitpos++;
- break;
- }
- dest_bitpos++;
- a0 = a1;
- a0color = !a0color;
- } else {
- int a2 = FindBit(src_buf, cols, a1 + 1, a0color);
- dest_bitpos++;
- dest_bitpos++;
- dest_buf[dest_bitpos / 8] |= 1 << (7 - dest_bitpos % 8);
- dest_bitpos++;
- if (a0 < 0) {
- a0 = 0;
- }
- FaxEncodeRun(dest_buf, dest_bitpos, a1 - a0, a0color);
- FaxEncodeRun(dest_buf, dest_bitpos, a2 - a1, !a0color);
- a0 = a2;
- }
- if (a0 >= cols) {
- return;
- }
- }
-}
-
-} // namespace
-
-class CCodec_FaxDecoder : public CCodec_ScanlineDecoder {
- public:
- CCodec_FaxDecoder();
- ~CCodec_FaxDecoder() override;
-
- FX_BOOL Create(const uint8_t* src_buf,
- FX_DWORD src_size,
- int width,
- int height,
- int K,
- FX_BOOL EndOfLine,
- FX_BOOL EncodedByteAlign,
- FX_BOOL BlackIs1,
- int Columns,
- int Rows);
-
- // CCodec_ScanlineDecoder
- void v_DownScale(int dest_width, int dest_height) override {}
- FX_BOOL v_Rewind() override;
- uint8_t* v_GetNextLine() override;
- FX_DWORD GetSrcOffset() override;
-
- int m_Encoding, m_bEndOfLine, m_bByteAlign, m_bBlack;
- int bitpos;
- const uint8_t* m_pSrcBuf;
- FX_DWORD m_SrcSize;
- uint8_t* m_pScanlineBuf;
- uint8_t* m_pRefBuf;
-};
-
-CCodec_FaxDecoder::CCodec_FaxDecoder() {
- m_pScanlineBuf = NULL;
- m_pRefBuf = NULL;
-}
-CCodec_FaxDecoder::~CCodec_FaxDecoder() {
- FX_Free(m_pScanlineBuf);
- FX_Free(m_pRefBuf);
-}
-FX_BOOL CCodec_FaxDecoder::Create(const uint8_t* src_buf,
- FX_DWORD src_size,
- int width,
- int height,
- int K,
- FX_BOOL EndOfLine,
- FX_BOOL EncodedByteAlign,
- FX_BOOL BlackIs1,
- int Columns,
- int Rows) {
- m_Encoding = K;
- m_bEndOfLine = EndOfLine;
- m_bByteAlign = EncodedByteAlign;
- m_bBlack = BlackIs1;
- m_OrigWidth = Columns;
- m_OrigHeight = Rows;
- if (m_OrigWidth == 0) {
- m_OrigWidth = width;
- }
- if (m_OrigHeight == 0) {
- m_OrigHeight = height;
- }
- // Should not overflow. Checked by FPDFAPI_CreateFaxDecoder.
- m_Pitch = (static_cast<FX_DWORD>(m_OrigWidth) + 31) / 32 * 4;
- m_OutputWidth = m_OrigWidth;
- m_OutputHeight = m_OrigHeight;
- m_pScanlineBuf = FX_Alloc(uint8_t, m_Pitch);
- m_pRefBuf = FX_Alloc(uint8_t, m_Pitch);
- m_pSrcBuf = src_buf;
- m_SrcSize = src_size;
- m_nComps = 1;
- m_bpc = 1;
- m_bColorTransformed = FALSE;
- return TRUE;
-}
-FX_BOOL CCodec_FaxDecoder::v_Rewind() {
- FXSYS_memset(m_pRefBuf, 0xff, m_Pitch);
- bitpos = 0;
- return TRUE;
-}
-uint8_t* CCodec_FaxDecoder::v_GetNextLine() {
- int bitsize = m_SrcSize * 8;
- FaxSkipEOL(m_pSrcBuf, bitsize, bitpos);
- if (bitpos >= bitsize) {
- return NULL;
- }
- FXSYS_memset(m_pScanlineBuf, 0xff, m_Pitch);
- if (m_Encoding < 0) {
- FaxG4GetRow(m_pSrcBuf, bitsize, bitpos, m_pScanlineBuf, m_pRefBuf,
- m_OrigWidth);
- FXSYS_memcpy(m_pRefBuf, m_pScanlineBuf, m_Pitch);
- } else if (m_Encoding == 0) {
- FaxGet1DLine(m_pSrcBuf, bitsize, bitpos, m_pScanlineBuf, m_OrigWidth);
- } else {
- FX_BOOL bNext1D = m_pSrcBuf[bitpos / 8] & (1 << (7 - bitpos % 8));
- bitpos++;
- if (bNext1D) {
- FaxGet1DLine(m_pSrcBuf, bitsize, bitpos, m_pScanlineBuf, m_OrigWidth);
- } else {
- FaxG4GetRow(m_pSrcBuf, bitsize, bitpos, m_pScanlineBuf, m_pRefBuf,
- m_OrigWidth);
- }
- FXSYS_memcpy(m_pRefBuf, m_pScanlineBuf, m_Pitch);
- }
- if (m_bEndOfLine) {
- FaxSkipEOL(m_pSrcBuf, bitsize, bitpos);
- }
- if (m_bByteAlign && bitpos < bitsize) {
- int bitpos0 = bitpos;
- int bitpos1 = (bitpos + 7) / 8 * 8;
- while (m_bByteAlign && bitpos0 < bitpos1) {
- int bit = m_pSrcBuf[bitpos0 / 8] & (1 << (7 - bitpos0 % 8));
- if (bit != 0) {
- m_bByteAlign = FALSE;
- } else {
- bitpos0++;
- }
- }
- if (m_bByteAlign) {
- bitpos = bitpos1;
- }
- }
- if (m_bBlack) {
- for (FX_DWORD i = 0; i < m_Pitch; i++) {
- m_pScanlineBuf[i] = ~m_pScanlineBuf[i];
- }
- }
- return m_pScanlineBuf;
-}
-FX_DWORD CCodec_FaxDecoder::GetSrcOffset() {
- FX_DWORD ret = (bitpos + 7) / 8;
- if (ret > m_SrcSize) {
- ret = m_SrcSize;
- }
- return ret;
-}
-
-void FaxG4Decode(const uint8_t* src_buf,
- FX_DWORD src_size,
- int* pbitpos,
- uint8_t* dest_buf,
- int width,
- int height,
- int pitch) {
- if (pitch == 0) {
- pitch = (width + 7) / 8;
- }
- uint8_t* ref_buf = FX_Alloc(uint8_t, pitch);
- FXSYS_memset(ref_buf, 0xff, pitch);
- int bitpos = *pbitpos;
- for (int iRow = 0; iRow < height; iRow++) {
- uint8_t* line_buf = dest_buf + iRow * pitch;
- FXSYS_memset(line_buf, 0xff, pitch);
- FaxG4GetRow(src_buf, src_size << 3, bitpos, line_buf, ref_buf, width);
- FXSYS_memcpy(ref_buf, line_buf, pitch);
- }
- FX_Free(ref_buf);
- *pbitpos = bitpos;
-}
-
-class CCodec_FaxEncoder {
- public:
- CCodec_FaxEncoder(const uint8_t* src_buf, int width, int height, int pitch);
- ~CCodec_FaxEncoder();
- void Encode(uint8_t*& dest_buf, FX_DWORD& dest_size);
- void Encode2DLine(const uint8_t* scan_line);
- CFX_BinaryBuf m_DestBuf;
- uint8_t* m_pRefLine;
- uint8_t* m_pLineBuf;
- int m_Cols, m_Rows, m_Pitch;
- const uint8_t* m_pSrcBuf;
-};
-CCodec_FaxEncoder::CCodec_FaxEncoder(const uint8_t* src_buf,
- int width,
- int height,
- int pitch) {
- m_pSrcBuf = src_buf;
- m_Cols = width;
- m_Rows = height;
- m_Pitch = pitch;
- m_pRefLine = FX_Alloc(uint8_t, m_Pitch);
- FXSYS_memset(m_pRefLine, 0xff, m_Pitch);
- m_pLineBuf = FX_Alloc2D(uint8_t, m_Pitch, 8);
- m_DestBuf.EstimateSize(0, 10240);
-}
-CCodec_FaxEncoder::~CCodec_FaxEncoder() {
- FX_Free(m_pRefLine);
- FX_Free(m_pLineBuf);
-}
-void CCodec_FaxEncoder::Encode(uint8_t*& dest_buf, FX_DWORD& dest_size) {
- int dest_bitpos = 0;
- uint8_t last_byte = 0;
- for (int i = 0; i < m_Rows; i++) {
- const uint8_t* scan_line = m_pSrcBuf + i * m_Pitch;
- FXSYS_memset(m_pLineBuf, 0, m_Pitch * 8);
- m_pLineBuf[0] = last_byte;
- FaxEncode2DLine(m_pLineBuf, dest_bitpos, scan_line, m_pRefLine, m_Cols);
- m_DestBuf.AppendBlock(m_pLineBuf, dest_bitpos / 8);
- last_byte = m_pLineBuf[dest_bitpos / 8];
- dest_bitpos %= 8;
- FXSYS_memcpy(m_pRefLine, scan_line, m_Pitch);
- }
- if (dest_bitpos) {
- m_DestBuf.AppendByte(last_byte);
- }
- dest_size = m_DestBuf.GetSize();
- dest_buf = m_DestBuf.DetachBuffer();
-}
-FX_BOOL CCodec_FaxModule::Encode(const uint8_t* src_buf,
- int width,
- int height,
- int pitch,
- uint8_t*& dest_buf,
- FX_DWORD& dest_size) {
- CCodec_FaxEncoder encoder(src_buf, width, height, pitch);
- encoder.Encode(dest_buf, dest_size);
- return TRUE;
-}
-ICodec_ScanlineDecoder* CCodec_FaxModule::CreateDecoder(
- const uint8_t* src_buf,
- FX_DWORD src_size,
- int width,
- int height,
- int K,
- FX_BOOL EndOfLine,
- FX_BOOL EncodedByteAlign,
- FX_BOOL BlackIs1,
- int Columns,
- int Rows) {
- CCodec_FaxDecoder* pDecoder = new CCodec_FaxDecoder;
- pDecoder->Create(src_buf, src_size, width, height, K, EndOfLine,
- EncodedByteAlign, BlackIs1, Columns, Rows);
- return pDecoder;
-}
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