| // 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 <limits.h> |
| |
| #include "core/include/fpdfapi/fpdf_module.h" |
| #include "core/include/fpdfapi/fpdf_parser.h" |
| #include "core/include/fxcodec/fx_codec.h" |
| |
| #define _STREAM_MAX_SIZE_ 20 * 1024 * 1024 |
| |
| const FX_WORD PDFDocEncoding[256] = { |
| 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, |
| 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011, |
| 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x02d8, 0x02c7, 0x02c6, |
| 0x02d9, 0x02dd, 0x02db, 0x02da, 0x02dc, 0x0020, 0x0021, 0x0022, 0x0023, |
| 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, |
| 0x002d, 0x002e, 0x002f, 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, |
| 0x0036, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, |
| 0x003f, 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, |
| 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, 0x0050, |
| 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, |
| 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, 0x0060, 0x0061, 0x0062, |
| 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006a, 0x006b, |
| 0x006c, 0x006d, 0x006e, 0x006f, 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, |
| 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, |
| 0x007e, 0x0000, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, 0x2013, 0x0192, |
| 0x2044, 0x2039, 0x203a, 0x2212, 0x2030, 0x201e, 0x201c, 0x201d, 0x2018, |
| 0x2019, 0x201a, 0x2122, 0xfb01, 0xfb02, 0x0141, 0x0152, 0x0160, 0x0178, |
| 0x017d, 0x0131, 0x0142, 0x0153, 0x0161, 0x017e, 0x0000, 0x20ac, 0x00a1, |
| 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, 0x00a8, 0x00a9, 0x00aa, |
| 0x00ab, 0x00ac, 0x0000, 0x00ae, 0x00af, 0x00b0, 0x00b1, 0x00b2, 0x00b3, |
| 0x00b4, 0x00b5, 0x00b6, 0x00b7, 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, |
| 0x00bd, 0x00be, 0x00bf, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, |
| 0x00c6, 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, |
| 0x00cf, 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, |
| 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, 0x00e0, |
| 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, 0x00e8, 0x00e9, |
| 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, 0x00f0, 0x00f1, 0x00f2, |
| 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, 0x00f8, 0x00f9, 0x00fa, 0x00fb, |
| 0x00fc, 0x00fd, 0x00fe, 0x00ff}; |
| |
| FX_DWORD A85Decode(const uint8_t* src_buf, |
| FX_DWORD src_size, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size) { |
| dest_size = 0; |
| dest_buf = NULL; |
| if (src_size == 0) { |
| return 0; |
| } |
| FX_DWORD zcount = 0; |
| FX_DWORD pos = 0; |
| while (pos < src_size) { |
| uint8_t ch = src_buf[pos]; |
| if (ch < '!' && ch != '\n' && ch != '\r' && ch != ' ' && ch != '\t') { |
| break; |
| } |
| if (ch == 'z') { |
| zcount++; |
| } else if (ch > 'u') { |
| break; |
| } |
| pos++; |
| } |
| if (pos == 0) { |
| return 0; |
| } |
| if (zcount > UINT_MAX / 4) { |
| return (FX_DWORD)-1; |
| } |
| if (zcount * 4 > UINT_MAX - (pos - zcount)) { |
| return (FX_DWORD)-1; |
| } |
| dest_buf = FX_Alloc(uint8_t, zcount * 4 + (pos - zcount)); |
| int state = 0; |
| uint32_t res = 0; |
| pos = dest_size = 0; |
| while (pos < src_size) { |
| uint8_t ch = src_buf[pos++]; |
| if (PDFCharIsLineEnding(ch) || ch == ' ' || ch == '\t') |
| continue; |
| |
| if (ch == 'z') { |
| FXSYS_memset(dest_buf + dest_size, 0, 4); |
| state = 0; |
| res = 0; |
| dest_size += 4; |
| } else { |
| if (ch < '!' || ch > 'u') { |
| break; |
| } |
| res = res * 85 + ch - 33; |
| state++; |
| if (state == 5) { |
| for (int i = 0; i < 4; i++) { |
| dest_buf[dest_size++] = (uint8_t)(res >> (3 - i) * 8); |
| } |
| state = 0; |
| res = 0; |
| } |
| } |
| } |
| if (state) { |
| int i; |
| for (i = state; i < 5; i++) { |
| res = res * 85 + 84; |
| } |
| for (i = 0; i < state - 1; i++) { |
| dest_buf[dest_size++] = (uint8_t)(res >> (3 - i) * 8); |
| } |
| } |
| if (pos < src_size && src_buf[pos] == '>') { |
| pos++; |
| } |
| return pos; |
| } |
| FX_DWORD HexDecode(const uint8_t* src_buf, |
| FX_DWORD src_size, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size) { |
| FX_DWORD i; |
| for (i = 0; i < src_size; i++) |
| if (src_buf[i] == '>') { |
| break; |
| } |
| dest_buf = FX_Alloc(uint8_t, i / 2 + 1); |
| dest_size = 0; |
| FX_BOOL bFirstDigit = TRUE; |
| for (i = 0; i < src_size; i++) { |
| uint8_t ch = src_buf[i]; |
| if (PDFCharIsLineEnding(ch) || ch == ' ' || ch == '\t') |
| continue; |
| |
| int digit; |
| if (ch <= '9' && ch >= '0') { |
| digit = ch - '0'; |
| } else if (ch <= 'f' && ch >= 'a') { |
| digit = ch - 'a' + 10; |
| } else if (ch <= 'F' && ch >= 'A') { |
| digit = ch - 'A' + 10; |
| } else if (ch == '>') { |
| i++; |
| break; |
| } else { |
| continue; |
| } |
| if (bFirstDigit) { |
| dest_buf[dest_size] = digit * 16; |
| } else { |
| dest_buf[dest_size++] += digit; |
| } |
| bFirstDigit = !bFirstDigit; |
| } |
| if (!bFirstDigit) { |
| dest_size++; |
| } |
| return i; |
| } |
| FX_DWORD RunLengthDecode(const uint8_t* src_buf, |
| FX_DWORD src_size, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size) { |
| FX_DWORD i = 0; |
| FX_DWORD old; |
| dest_size = 0; |
| while (i < src_size) { |
| if (src_buf[i] < 128) { |
| old = dest_size; |
| dest_size += src_buf[i] + 1; |
| if (dest_size < old) { |
| return (FX_DWORD)-1; |
| } |
| i += src_buf[i] + 2; |
| } else if (src_buf[i] > 128) { |
| old = dest_size; |
| dest_size += 257 - src_buf[i]; |
| if (dest_size < old) { |
| return (FX_DWORD)-1; |
| } |
| i += 2; |
| } else { |
| break; |
| } |
| } |
| if (dest_size >= _STREAM_MAX_SIZE_) { |
| return -1; |
| } |
| dest_buf = FX_Alloc(uint8_t, dest_size); |
| i = 0; |
| int dest_count = 0; |
| while (i < src_size) { |
| if (src_buf[i] < 128) { |
| FX_DWORD copy_len = src_buf[i] + 1; |
| FX_DWORD buf_left = src_size - i - 1; |
| if (buf_left < copy_len) { |
| FX_DWORD delta = copy_len - buf_left; |
| copy_len = buf_left; |
| FXSYS_memset(dest_buf + dest_count + copy_len, '\0', delta); |
| } |
| FXSYS_memcpy(dest_buf + dest_count, src_buf + i + 1, copy_len); |
| dest_count += src_buf[i] + 1; |
| i += src_buf[i] + 2; |
| } else if (src_buf[i] > 128) { |
| int fill = 0; |
| if (i < src_size - 1) { |
| fill = src_buf[i + 1]; |
| } |
| FXSYS_memset(dest_buf + dest_count, fill, 257 - src_buf[i]); |
| dest_count += 257 - src_buf[i]; |
| i += 2; |
| } else { |
| break; |
| } |
| } |
| FX_DWORD ret = i + 1; |
| if (ret > src_size) { |
| ret = src_size; |
| } |
| return ret; |
| } |
| ICodec_ScanlineDecoder* FPDFAPI_CreateFaxDecoder( |
| const uint8_t* src_buf, |
| FX_DWORD src_size, |
| int width, |
| int height, |
| const CPDF_Dictionary* pParams) { |
| int K = 0; |
| FX_BOOL EndOfLine = FALSE; |
| FX_BOOL ByteAlign = FALSE; |
| FX_BOOL BlackIs1 = FALSE; |
| int Columns = 1728; |
| int Rows = 0; |
| if (pParams) { |
| K = pParams->GetInteger(FX_BSTRC("K")); |
| EndOfLine = pParams->GetInteger(FX_BSTRC("EndOfLine")); |
| ByteAlign = pParams->GetInteger(FX_BSTRC("EncodedByteAlign")); |
| BlackIs1 = pParams->GetInteger(FX_BSTRC("BlackIs1")); |
| Columns = pParams->GetInteger(FX_BSTRC("Columns"), 1728); |
| Rows = pParams->GetInteger(FX_BSTRC("Rows")); |
| if (Rows > USHRT_MAX) { |
| Rows = 0; |
| } |
| if (Columns <= 0 || Rows < 0 || Columns > USHRT_MAX || Rows > USHRT_MAX) { |
| return NULL; |
| } |
| } |
| return CPDF_ModuleMgr::Get()->GetFaxModule()->CreateDecoder( |
| src_buf, src_size, width, height, K, EndOfLine, ByteAlign, BlackIs1, |
| Columns, Rows); |
| } |
| static FX_BOOL CheckFlateDecodeParams(int Colors, |
| int BitsPerComponent, |
| int Columns) { |
| if (Columns < 0) { |
| return FALSE; |
| } |
| int check = Columns; |
| if (Colors < 0 || (check > 0 && Colors > INT_MAX / check)) { |
| return FALSE; |
| } |
| check *= Colors; |
| if (BitsPerComponent < 0 || |
| (check > 0 && BitsPerComponent > INT_MAX / check)) { |
| return FALSE; |
| } |
| check *= BitsPerComponent; |
| if (check > INT_MAX - 7) { |
| return FALSE; |
| } |
| return TRUE; |
| } |
| ICodec_ScanlineDecoder* FPDFAPI_CreateFlateDecoder( |
| const uint8_t* src_buf, |
| FX_DWORD src_size, |
| int width, |
| int height, |
| int nComps, |
| int bpc, |
| const CPDF_Dictionary* pParams) { |
| int predictor = 0; |
| int Colors = 0, BitsPerComponent = 0, Columns = 0; |
| if (pParams) { |
| predictor = pParams->GetInteger(FX_BSTRC("Predictor")); |
| Colors = pParams->GetInteger(FX_BSTRC("Colors"), 1); |
| BitsPerComponent = pParams->GetInteger(FX_BSTRC("BitsPerComponent"), 8); |
| Columns = pParams->GetInteger(FX_BSTRC("Columns"), 1); |
| if (!CheckFlateDecodeParams(Colors, BitsPerComponent, Columns)) { |
| return NULL; |
| } |
| } |
| return CPDF_ModuleMgr::Get()->GetFlateModule()->CreateDecoder( |
| src_buf, src_size, width, height, nComps, bpc, predictor, Colors, |
| BitsPerComponent, Columns); |
| } |
| FX_DWORD FPDFAPI_FlateOrLZWDecode(FX_BOOL bLZW, |
| const uint8_t* src_buf, |
| FX_DWORD src_size, |
| CPDF_Dictionary* pParams, |
| FX_DWORD estimated_size, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size) { |
| int predictor = 0; |
| FX_BOOL bEarlyChange = TRUE; |
| int Colors = 0, BitsPerComponent = 0, Columns = 0; |
| if (pParams) { |
| predictor = pParams->GetInteger(FX_BSTRC("Predictor")); |
| bEarlyChange = pParams->GetInteger(FX_BSTRC("EarlyChange"), 1); |
| Colors = pParams->GetInteger(FX_BSTRC("Colors"), 1); |
| BitsPerComponent = pParams->GetInteger(FX_BSTRC("BitsPerComponent"), 8); |
| Columns = pParams->GetInteger(FX_BSTRC("Columns"), 1); |
| if (!CheckFlateDecodeParams(Colors, BitsPerComponent, Columns)) { |
| return (FX_DWORD)-1; |
| } |
| } |
| return CPDF_ModuleMgr::Get()->GetFlateModule()->FlateOrLZWDecode( |
| bLZW, src_buf, src_size, bEarlyChange, predictor, Colors, |
| BitsPerComponent, Columns, estimated_size, dest_buf, dest_size); |
| } |
| FX_BOOL PDF_DataDecode(const uint8_t* src_buf, |
| FX_DWORD src_size, |
| const CPDF_Dictionary* pDict, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size, |
| CFX_ByteString& ImageEncoding, |
| CPDF_Dictionary*& pImageParms, |
| FX_DWORD last_estimated_size, |
| FX_BOOL bImageAcc) |
| |
| { |
| CPDF_Object* pDecoder = |
| pDict ? pDict->GetElementValue(FX_BSTRC("Filter")) : nullptr; |
| if (!pDecoder || (!pDecoder->IsArray() && !pDecoder->IsName())) |
| return FALSE; |
| |
| CPDF_Object* pParams = |
| pDict ? pDict->GetElementValue(FX_BSTRC("DecodeParms")) : nullptr; |
| CFX_ByteStringArray DecoderList; |
| CFX_PtrArray ParamList; |
| if (CPDF_Array* pDecoders = pDecoder->AsArray()) { |
| CPDF_Array* pParamsArray = ToArray(pParams); |
| if (!pParamsArray) |
| pParams = nullptr; |
| |
| for (FX_DWORD i = 0; i < pDecoders->GetCount(); i++) { |
| CFX_ByteStringC str = pDecoders->GetConstString(i); |
| DecoderList.Add(str); |
| ParamList.Add(pParams ? pParamsArray->GetDict(i) : nullptr); |
| } |
| } else { |
| DecoderList.Add(pDecoder->GetConstString()); |
| ParamList.Add(pParams ? pParams->GetDict() : nullptr); |
| } |
| uint8_t* last_buf = (uint8_t*)src_buf; |
| FX_DWORD last_size = src_size; |
| for (int i = 0; i < DecoderList.GetSize(); i++) { |
| int estimated_size = |
| i == DecoderList.GetSize() - 1 ? last_estimated_size : 0; |
| CFX_ByteString decoder = DecoderList[i]; |
| // Use ToDictionary here because we can push NULL into the ParamList. |
| CPDF_Dictionary* pParam = |
| ToDictionary(static_cast<CPDF_Object*>(ParamList[i])); |
| uint8_t* new_buf = nullptr; |
| FX_DWORD new_size = (FX_DWORD)-1; |
| int offset = -1; |
| if (decoder == FX_BSTRC("FlateDecode") || decoder == FX_BSTRC("Fl")) { |
| if (bImageAcc && i == DecoderList.GetSize() - 1) { |
| ImageEncoding = FX_BSTRC("FlateDecode"); |
| dest_buf = (uint8_t*)last_buf; |
| dest_size = last_size; |
| pImageParms = pParam; |
| return TRUE; |
| } |
| offset = FPDFAPI_FlateOrLZWDecode(FALSE, last_buf, last_size, pParam, |
| estimated_size, new_buf, new_size); |
| } else if (decoder == FX_BSTRC("LZWDecode") || decoder == FX_BSTRC("LZW")) { |
| offset = FPDFAPI_FlateOrLZWDecode(TRUE, last_buf, last_size, pParam, |
| estimated_size, new_buf, new_size); |
| } else if (decoder == FX_BSTRC("ASCII85Decode") || |
| decoder == FX_BSTRC("A85")) { |
| offset = A85Decode(last_buf, last_size, new_buf, new_size); |
| } else if (decoder == FX_BSTRC("ASCIIHexDecode") || |
| decoder == FX_BSTRC("AHx")) { |
| offset = HexDecode(last_buf, last_size, new_buf, new_size); |
| } else if (decoder == FX_BSTRC("RunLengthDecode") || |
| decoder == FX_BSTRC("RL")) { |
| if (bImageAcc && i == DecoderList.GetSize() - 1) { |
| ImageEncoding = FX_BSTRC("RunLengthDecode"); |
| dest_buf = (uint8_t*)last_buf; |
| dest_size = last_size; |
| pImageParms = pParam; |
| return TRUE; |
| } |
| offset = RunLengthDecode(last_buf, last_size, new_buf, new_size); |
| } else if (decoder == FX_BSTRC("Crypt")) { |
| continue; |
| } else { |
| // If we get here, assume it's an image decoder. |
| if (decoder == FX_BSTRC("DCT")) { |
| decoder = "DCTDecode"; |
| } else if (decoder == FX_BSTRC("CCF")) { |
| decoder = "CCITTFaxDecode"; |
| } |
| ImageEncoding = decoder; |
| pImageParms = pParam; |
| dest_buf = (uint8_t*)last_buf; |
| dest_size = last_size; |
| if (CPDF_Array* pDecoders = pDecoder->AsArray()) |
| pDecoders->RemoveAt(i + 1, pDecoders->GetCount() - i - 1); |
| return TRUE; |
| } |
| if (last_buf != src_buf) { |
| FX_Free(last_buf); |
| } |
| if (offset == -1) { |
| FX_Free(new_buf); |
| return FALSE; |
| } |
| last_buf = new_buf; |
| last_size = new_size; |
| } |
| ImageEncoding = ""; |
| pImageParms = nullptr; |
| dest_buf = last_buf; |
| dest_size = last_size; |
| return TRUE; |
| } |
| CFX_WideString PDF_DecodeText(const uint8_t* src_data, |
| FX_DWORD src_len, |
| CFX_CharMap* pCharMap) { |
| CFX_WideString result; |
| if (src_len >= 2 && ((src_data[0] == 0xfe && src_data[1] == 0xff) || |
| (src_data[0] == 0xff && src_data[1] == 0xfe))) { |
| FX_BOOL bBE = src_data[0] == 0xfe; |
| FX_DWORD max_chars = (src_len - 2) / 2; |
| if (!max_chars) { |
| return result; |
| } |
| if (src_data[0] == 0xff) { |
| bBE = !src_data[2]; |
| } |
| FX_WCHAR* dest_buf = result.GetBuffer(max_chars); |
| const uint8_t* uni_str = src_data + 2; |
| int dest_pos = 0; |
| for (FX_DWORD i = 0; i < max_chars * 2; i += 2) { |
| FX_WORD unicode = bBE ? (uni_str[i] << 8 | uni_str[i + 1]) |
| : (uni_str[i + 1] << 8 | uni_str[i]); |
| if (unicode == 0x1b) { |
| i += 2; |
| while (i < max_chars * 2) { |
| FX_WORD unicode = bBE ? (uni_str[i] << 8 | uni_str[i + 1]) |
| : (uni_str[i + 1] << 8 | uni_str[i]); |
| i += 2; |
| if (unicode == 0x1b) { |
| break; |
| } |
| } |
| } else { |
| dest_buf[dest_pos++] = unicode; |
| } |
| } |
| result.ReleaseBuffer(dest_pos); |
| } else if (pCharMap == NULL) { |
| FX_WCHAR* dest_buf = result.GetBuffer(src_len); |
| for (FX_DWORD i = 0; i < src_len; i++) { |
| dest_buf[i] = PDFDocEncoding[src_data[i]]; |
| } |
| result.ReleaseBuffer(src_len); |
| } else { |
| return (*pCharMap->m_GetWideString)( |
| pCharMap, CFX_ByteString((const FX_CHAR*)src_data, src_len)); |
| } |
| return result; |
| } |
| CFX_ByteString PDF_EncodeText(const FX_WCHAR* pString, |
| int len, |
| CFX_CharMap* pCharMap) { |
| if (len == -1) { |
| len = FXSYS_wcslen(pString); |
| } |
| CFX_ByteString result; |
| if (pCharMap == NULL) { |
| FX_CHAR* dest_buf1 = result.GetBuffer(len); |
| int i; |
| for (i = 0; i < len; i++) { |
| int code; |
| for (code = 0; code < 256; code++) |
| if (PDFDocEncoding[code] == pString[i]) { |
| break; |
| } |
| if (code == 256) { |
| break; |
| } |
| dest_buf1[i] = code; |
| } |
| result.ReleaseBuffer(i); |
| if (i == len) { |
| return result; |
| } |
| } |
| |
| if (len > INT_MAX / 2 - 1) { |
| result.ReleaseBuffer(0); |
| return result; |
| } |
| |
| int encLen = len * 2 + 2; |
| |
| uint8_t* dest_buf2 = (uint8_t*)result.GetBuffer(encLen); |
| dest_buf2[0] = 0xfe; |
| dest_buf2[1] = 0xff; |
| dest_buf2 += 2; |
| for (int i = 0; i < len; i++) { |
| *dest_buf2++ = pString[i] >> 8; |
| *dest_buf2++ = (uint8_t)pString[i]; |
| } |
| result.ReleaseBuffer(encLen); |
| return result; |
| } |
| CFX_ByteString PDF_EncodeString(const CFX_ByteString& src, FX_BOOL bHex) { |
| CFX_ByteTextBuf result; |
| int srclen = src.GetLength(); |
| if (bHex) { |
| result.AppendChar('<'); |
| for (int i = 0; i < srclen; i++) { |
| result.AppendChar("0123456789ABCDEF"[src[i] / 16]); |
| result.AppendChar("0123456789ABCDEF"[src[i] % 16]); |
| } |
| result.AppendChar('>'); |
| return result.GetByteString(); |
| } |
| result.AppendChar('('); |
| for (int i = 0; i < srclen; i++) { |
| uint8_t ch = src[i]; |
| if (ch == ')' || ch == '\\' || ch == '(') { |
| result.AppendChar('\\'); |
| } else if (ch == 0x0a) { |
| result << FX_BSTRC("\\n"); |
| continue; |
| } else if (ch == 0x0d) { |
| result << FX_BSTRC("\\r"); |
| continue; |
| } |
| result.AppendChar(ch); |
| } |
| result.AppendChar(')'); |
| return result.GetByteString(); |
| } |
| void FlateEncode(const uint8_t* src_buf, |
| FX_DWORD src_size, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size) { |
| CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule(); |
| if (pEncoders) { |
| pEncoders->GetFlateModule()->Encode(src_buf, src_size, dest_buf, dest_size); |
| } |
| } |
| void FlateEncode(const uint8_t* src_buf, |
| FX_DWORD src_size, |
| int predictor, |
| int Colors, |
| int BitsPerComponent, |
| int Columns, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size) { |
| CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule(); |
| if (pEncoders) { |
| pEncoders->GetFlateModule()->Encode(src_buf, src_size, predictor, Colors, |
| BitsPerComponent, Columns, dest_buf, |
| dest_size); |
| } |
| } |
| FX_DWORD FlateDecode(const uint8_t* src_buf, |
| FX_DWORD src_size, |
| uint8_t*& dest_buf, |
| FX_DWORD& dest_size) { |
| CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule(); |
| if (pEncoders) { |
| return pEncoders->GetFlateModule()->FlateOrLZWDecode( |
| FALSE, src_buf, src_size, FALSE, 0, 0, 0, 0, 0, dest_buf, dest_size); |
| } |
| return 0; |
| } |
