summaryrefslogtreecommitdiff
path: root/core/src/fxcodec/codec/fx_codec_fax.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'core/src/fxcodec/codec/fx_codec_fax.cpp')
-rw-r--r--core/src/fxcodec/codec/fx_codec_fax.cpp1936
1 files changed, 968 insertions, 968 deletions
diff --git a/core/src/fxcodec/codec/fx_codec_fax.cpp b/core/src/fxcodec/codec/fx_codec_fax.cpp
index 21c7deb076..979df38197 100644
--- a/core/src/fxcodec/codec/fx_codec_fax.cpp
+++ b/core/src/fxcodec/codec/fx_codec_fax.cpp
@@ -1,968 +1,968 @@
-// 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 "../../../include/fxcodec/fx_codec.h"
-#include "codec_int.h"
-extern const FX_BYTE OneLeadPos[256];
-extern const FX_BYTE ZeroLeadPos[256];
-int _FindBit(const FX_BYTE* data_buf, int max_pos, int start_pos, int bit)
-{
- if (start_pos >= max_pos) {
- return max_pos;
- }
- FX_LPCBYTE leading_pos = bit ? OneLeadPos : ZeroLeadPos;
- if (start_pos % 8) {
- FX_BYTE 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;
- }
- FX_BYTE 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 FX_BYTE* ref_buf, int columns, int a0, FX_BOOL a0color, int& b1, int& b2)
-{
- if (a0color) {
- a0color = 1;
- }
- FX_BYTE 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(FX_LPBYTE 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_memset32(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))
-static const FX_BYTE 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
-};
-static const FX_BYTE 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(FX_LPCBYTE ins_array, const FX_BYTE* src_buf, int& bitpos, int bitsize)
-{
- FX_DWORD code = 0;
- int ins_off = 0;
- while (1) {
- FX_BYTE 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 FX_BYTE* src_buf, int bitsize, int& bitpos, FX_LPBYTE dest_buf, const FX_BYTE* ref_buf, int columns)
-{
- int a0 = -1, a0color = 1;
- 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 FX_BYTE* 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 FX_BYTE* src_buf, int bitsize, int& bitpos, FX_LPBYTE dest_buf, int columns)
-{
- int 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;
-}
-class CCodec_FaxDecoder : public CCodec_ScanlineDecoder
-{
-public:
- CCodec_FaxDecoder();
- virtual ~CCodec_FaxDecoder();
- FX_BOOL Create(FX_LPCBYTE 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);
- virtual void v_DownScale(int dest_width, int dest_height) {}
- virtual FX_BOOL v_Rewind();
- virtual FX_LPBYTE v_GetNextLine();
- virtual FX_DWORD GetSrcOffset();
- int m_Encoding, m_bEndOfLine, m_bByteAlign, m_bBlack;
- int bitpos;
- FX_LPCBYTE m_pSrcBuf;
- FX_DWORD m_SrcSize;
- FX_LPBYTE m_pScanlineBuf, m_pRefBuf;
-};
-CCodec_FaxDecoder::CCodec_FaxDecoder()
-{
- m_pScanlineBuf = NULL;
- m_pRefBuf = NULL;
-}
-CCodec_FaxDecoder::~CCodec_FaxDecoder()
-{
- if (m_pScanlineBuf) {
- FX_Free(m_pScanlineBuf);
- }
- if (m_pRefBuf) {
- FX_Free(m_pRefBuf);
- }
-}
-FX_BOOL CCodec_FaxDecoder::Create(FX_LPCBYTE 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;
- }
- m_Pitch = (m_OrigWidth + 31) / 32 * 4;
- m_OutputWidth = m_OrigWidth;
- m_OutputHeight = m_OrigHeight;
- m_pScanlineBuf = FX_Alloc(FX_BYTE, m_Pitch);
- if (m_pScanlineBuf == NULL) {
- return FALSE;
- }
- m_pRefBuf = FX_Alloc(FX_BYTE, m_Pitch);
- if (m_pRefBuf == NULL) {
- return FALSE;
- }
- 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_memset8(m_pRefBuf, 0xff, m_Pitch);
- bitpos = 0;
- return TRUE;
-}
-FX_LPBYTE CCodec_FaxDecoder::v_GetNextLine()
-{
- int bitsize = m_SrcSize * 8;
- _FaxSkipEOL(m_pSrcBuf, bitsize, bitpos);
- if (bitpos >= bitsize) {
- return NULL;
- }
- FXSYS_memset8(m_pScanlineBuf, 0xff, m_Pitch);
- if (m_Encoding < 0) {
- _FaxG4GetRow(m_pSrcBuf, bitsize, bitpos, m_pScanlineBuf, m_pRefBuf, m_OrigWidth);
- FXSYS_memcpy32(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_memcpy32(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 (int 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;
-}
-extern "C" {
- void _FaxG4Decode(void*, FX_LPCBYTE src_buf, FX_DWORD src_size, int* pbitpos, FX_LPBYTE dest_buf, int width, int height, int pitch)
- {
- if (pitch == 0) {
- pitch = (width + 7) / 8;
- }
- FX_LPBYTE ref_buf = FX_Alloc(FX_BYTE, pitch);
- if (ref_buf == NULL) {
- return;
- }
- FXSYS_memset8(ref_buf, 0xff, pitch);
- int bitpos = *pbitpos;
- for (int iRow = 0; iRow < height; iRow ++) {
- FX_LPBYTE line_buf = dest_buf + iRow * pitch;
- FXSYS_memset8(line_buf, 0xff, pitch);
- _FaxG4GetRow(src_buf, src_size << 3, bitpos, line_buf, ref_buf, width);
- FXSYS_memcpy32(ref_buf, line_buf, pitch);
- }
- FX_Free(ref_buf);
- *pbitpos = bitpos;
- }
-};
-static const FX_BYTE 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,
-};
-static const FX_BYTE 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,
-};
-static const FX_BYTE 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,
-};
-static const FX_BYTE 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,
-};
-static void _AddBitStream(FX_LPBYTE 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 ++;
- }
-}
-static void _FaxEncodeRun(FX_LPBYTE dest_buf, int& dest_bitpos, int run, FX_BOOL bWhite)
-{
- while (run >= 2560) {
- _AddBitStream(dest_buf, dest_bitpos, 0x1f, 12);
- run -= 2560;
- }
- if (run >= 64) {
- int markup = run - run % 64;
- FX_LPCBYTE p = bWhite ? WhiteRunMarkup : BlackRunMarkup;
- p += (markup / 64 - 1) * 2;
- _AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
- }
- run %= 64;
- FX_LPCBYTE p = bWhite ? WhiteRunTerminator : BlackRunTerminator;
- p += run * 2;
- _AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
-}
-static void _FaxEncode2DLine(FX_LPBYTE dest_buf, int& dest_bitpos, FX_LPCBYTE src_buf, FX_LPCBYTE ref_buf, int cols)
-{
- int a0 = -1, a0color = 1;
- while (1) {
- int a1 = _FindBit(src_buf, cols, a0 + 1, 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 = 1 - 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, 1 - a0color);
- a0 = a2;
- }
- if (a0 >= cols) {
- return;
- }
- }
-}
-class CCodec_FaxEncoder : public CFX_Object
-{
-public:
- CCodec_FaxEncoder(FX_LPCBYTE src_buf, int width, int height, int pitch);
- ~CCodec_FaxEncoder();
- void Encode(FX_LPBYTE& dest_buf, FX_DWORD& dest_size);
- void Encode2DLine(FX_LPCBYTE scan_line);
- CFX_BinaryBuf m_DestBuf;
- FX_LPBYTE m_pRefLine, m_pLineBuf;
- int m_Cols, m_Rows, m_Pitch;
- FX_LPCBYTE m_pSrcBuf;
-};
-CCodec_FaxEncoder::CCodec_FaxEncoder(FX_LPCBYTE 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(FX_BYTE, m_Pitch);
- if (m_pRefLine == NULL) {
- return;
- }
- FXSYS_memset8(m_pRefLine, 0xff, m_Pitch);
- m_pLineBuf = FX_Alloc(FX_BYTE, m_Pitch * 8);
- if (m_pLineBuf == NULL) {
- return;
- }
- m_DestBuf.EstimateSize(0, 10240);
-}
-CCodec_FaxEncoder::~CCodec_FaxEncoder()
-{
- if (m_pRefLine) {
- FX_Free(m_pRefLine);
- }
- if (m_pLineBuf) {
- FX_Free(m_pLineBuf);
- }
-}
-void CCodec_FaxEncoder::Encode(FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
-{
- int dest_bitpos = 0;
- FX_BYTE last_byte = 0;
- for (int i = 0; i < m_Rows; i ++) {
- FX_LPCBYTE scan_line = m_pSrcBuf + i * m_Pitch;
- FXSYS_memset32(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_memcpy32(m_pRefLine, scan_line, m_Pitch);
- }
- if (dest_bitpos) {
- m_DestBuf.AppendByte(last_byte);
- }
- dest_buf = m_DestBuf.GetBuffer();
- dest_size = m_DestBuf.GetSize();
- m_DestBuf.DetachBuffer();
-}
-FX_BOOL CCodec_FaxModule::Encode(FX_LPCBYTE src_buf, int width, int height, int pitch, FX_LPBYTE& 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(FX_LPCBYTE 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 = FX_NEW CCodec_FaxDecoder;
- if (pDecoder == NULL) {
- return NULL;
- }
- pDecoder->Create(src_buf, src_size, width, height, K, EndOfLine, EncodedByteAlign, BlackIs1, Columns, Rows);
- return pDecoder;
-}
+// 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 "../../../include/fxcodec/fx_codec.h"
+#include "codec_int.h"
+extern const FX_BYTE OneLeadPos[256];
+extern const FX_BYTE ZeroLeadPos[256];
+int _FindBit(const FX_BYTE* data_buf, int max_pos, int start_pos, int bit)
+{
+ if (start_pos >= max_pos) {
+ return max_pos;
+ }
+ FX_LPCBYTE leading_pos = bit ? OneLeadPos : ZeroLeadPos;
+ if (start_pos % 8) {
+ FX_BYTE 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;
+ }
+ FX_BYTE 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 FX_BYTE* ref_buf, int columns, int a0, FX_BOOL a0color, int& b1, int& b2)
+{
+ if (a0color) {
+ a0color = 1;
+ }
+ FX_BYTE 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(FX_LPBYTE 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_memset32(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))
+static const FX_BYTE 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
+};
+static const FX_BYTE 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(FX_LPCBYTE ins_array, const FX_BYTE* src_buf, int& bitpos, int bitsize)
+{
+ FX_DWORD code = 0;
+ int ins_off = 0;
+ while (1) {
+ FX_BYTE 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 FX_BYTE* src_buf, int bitsize, int& bitpos, FX_LPBYTE dest_buf, const FX_BYTE* ref_buf, int columns)
+{
+ int a0 = -1, a0color = 1;
+ 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 FX_BYTE* 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 FX_BYTE* src_buf, int bitsize, int& bitpos, FX_LPBYTE dest_buf, int columns)
+{
+ int 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;
+}
+class CCodec_FaxDecoder : public CCodec_ScanlineDecoder
+{
+public:
+ CCodec_FaxDecoder();
+ virtual ~CCodec_FaxDecoder();
+ FX_BOOL Create(FX_LPCBYTE 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);
+ virtual void v_DownScale(int dest_width, int dest_height) {}
+ virtual FX_BOOL v_Rewind();
+ virtual FX_LPBYTE v_GetNextLine();
+ virtual FX_DWORD GetSrcOffset();
+ int m_Encoding, m_bEndOfLine, m_bByteAlign, m_bBlack;
+ int bitpos;
+ FX_LPCBYTE m_pSrcBuf;
+ FX_DWORD m_SrcSize;
+ FX_LPBYTE m_pScanlineBuf, m_pRefBuf;
+};
+CCodec_FaxDecoder::CCodec_FaxDecoder()
+{
+ m_pScanlineBuf = NULL;
+ m_pRefBuf = NULL;
+}
+CCodec_FaxDecoder::~CCodec_FaxDecoder()
+{
+ if (m_pScanlineBuf) {
+ FX_Free(m_pScanlineBuf);
+ }
+ if (m_pRefBuf) {
+ FX_Free(m_pRefBuf);
+ }
+}
+FX_BOOL CCodec_FaxDecoder::Create(FX_LPCBYTE 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;
+ }
+ m_Pitch = (m_OrigWidth + 31) / 32 * 4;
+ m_OutputWidth = m_OrigWidth;
+ m_OutputHeight = m_OrigHeight;
+ m_pScanlineBuf = FX_Alloc(FX_BYTE, m_Pitch);
+ if (m_pScanlineBuf == NULL) {
+ return FALSE;
+ }
+ m_pRefBuf = FX_Alloc(FX_BYTE, m_Pitch);
+ if (m_pRefBuf == NULL) {
+ return FALSE;
+ }
+ 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_memset8(m_pRefBuf, 0xff, m_Pitch);
+ bitpos = 0;
+ return TRUE;
+}
+FX_LPBYTE CCodec_FaxDecoder::v_GetNextLine()
+{
+ int bitsize = m_SrcSize * 8;
+ _FaxSkipEOL(m_pSrcBuf, bitsize, bitpos);
+ if (bitpos >= bitsize) {
+ return NULL;
+ }
+ FXSYS_memset8(m_pScanlineBuf, 0xff, m_Pitch);
+ if (m_Encoding < 0) {
+ _FaxG4GetRow(m_pSrcBuf, bitsize, bitpos, m_pScanlineBuf, m_pRefBuf, m_OrigWidth);
+ FXSYS_memcpy32(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_memcpy32(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 (int 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;
+}
+extern "C" {
+ void _FaxG4Decode(void*, FX_LPCBYTE src_buf, FX_DWORD src_size, int* pbitpos, FX_LPBYTE dest_buf, int width, int height, int pitch)
+ {
+ if (pitch == 0) {
+ pitch = (width + 7) / 8;
+ }
+ FX_LPBYTE ref_buf = FX_Alloc(FX_BYTE, pitch);
+ if (ref_buf == NULL) {
+ return;
+ }
+ FXSYS_memset8(ref_buf, 0xff, pitch);
+ int bitpos = *pbitpos;
+ for (int iRow = 0; iRow < height; iRow ++) {
+ FX_LPBYTE line_buf = dest_buf + iRow * pitch;
+ FXSYS_memset8(line_buf, 0xff, pitch);
+ _FaxG4GetRow(src_buf, src_size << 3, bitpos, line_buf, ref_buf, width);
+ FXSYS_memcpy32(ref_buf, line_buf, pitch);
+ }
+ FX_Free(ref_buf);
+ *pbitpos = bitpos;
+ }
+};
+static const FX_BYTE 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,
+};
+static const FX_BYTE 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,
+};
+static const FX_BYTE 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,
+};
+static const FX_BYTE 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,
+};
+static void _AddBitStream(FX_LPBYTE 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 ++;
+ }
+}
+static void _FaxEncodeRun(FX_LPBYTE dest_buf, int& dest_bitpos, int run, FX_BOOL bWhite)
+{
+ while (run >= 2560) {
+ _AddBitStream(dest_buf, dest_bitpos, 0x1f, 12);
+ run -= 2560;
+ }
+ if (run >= 64) {
+ int markup = run - run % 64;
+ FX_LPCBYTE p = bWhite ? WhiteRunMarkup : BlackRunMarkup;
+ p += (markup / 64 - 1) * 2;
+ _AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
+ }
+ run %= 64;
+ FX_LPCBYTE p = bWhite ? WhiteRunTerminator : BlackRunTerminator;
+ p += run * 2;
+ _AddBitStream(dest_buf, dest_bitpos, *p, p[1]);
+}
+static void _FaxEncode2DLine(FX_LPBYTE dest_buf, int& dest_bitpos, FX_LPCBYTE src_buf, FX_LPCBYTE ref_buf, int cols)
+{
+ int a0 = -1, a0color = 1;
+ while (1) {
+ int a1 = _FindBit(src_buf, cols, a0 + 1, 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 = 1 - 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, 1 - a0color);
+ a0 = a2;
+ }
+ if (a0 >= cols) {
+ return;
+ }
+ }
+}
+class CCodec_FaxEncoder : public CFX_Object
+{
+public:
+ CCodec_FaxEncoder(FX_LPCBYTE src_buf, int width, int height, int pitch);
+ ~CCodec_FaxEncoder();
+ void Encode(FX_LPBYTE& dest_buf, FX_DWORD& dest_size);
+ void Encode2DLine(FX_LPCBYTE scan_line);
+ CFX_BinaryBuf m_DestBuf;
+ FX_LPBYTE m_pRefLine, m_pLineBuf;
+ int m_Cols, m_Rows, m_Pitch;
+ FX_LPCBYTE m_pSrcBuf;
+};
+CCodec_FaxEncoder::CCodec_FaxEncoder(FX_LPCBYTE 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(FX_BYTE, m_Pitch);
+ if (m_pRefLine == NULL) {
+ return;
+ }
+ FXSYS_memset8(m_pRefLine, 0xff, m_Pitch);
+ m_pLineBuf = FX_Alloc(FX_BYTE, m_Pitch * 8);
+ if (m_pLineBuf == NULL) {
+ return;
+ }
+ m_DestBuf.EstimateSize(0, 10240);
+}
+CCodec_FaxEncoder::~CCodec_FaxEncoder()
+{
+ if (m_pRefLine) {
+ FX_Free(m_pRefLine);
+ }
+ if (m_pLineBuf) {
+ FX_Free(m_pLineBuf);
+ }
+}
+void CCodec_FaxEncoder::Encode(FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
+{
+ int dest_bitpos = 0;
+ FX_BYTE last_byte = 0;
+ for (int i = 0; i < m_Rows; i ++) {
+ FX_LPCBYTE scan_line = m_pSrcBuf + i * m_Pitch;
+ FXSYS_memset32(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_memcpy32(m_pRefLine, scan_line, m_Pitch);
+ }
+ if (dest_bitpos) {
+ m_DestBuf.AppendByte(last_byte);
+ }
+ dest_buf = m_DestBuf.GetBuffer();
+ dest_size = m_DestBuf.GetSize();
+ m_DestBuf.DetachBuffer();
+}
+FX_BOOL CCodec_FaxModule::Encode(FX_LPCBYTE src_buf, int width, int height, int pitch, FX_LPBYTE& 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(FX_LPCBYTE 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 = FX_NEW CCodec_FaxDecoder;
+ if (pDecoder == NULL) {
+ return NULL;
+ }
+ pDecoder->Create(src_buf, src_size, width, height, K, EndOfLine, EncodedByteAlign, BlackIs1, Columns, Rows);
+ return pDecoder;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 16:20:16 +0000