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openjpeg support

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Kulikova Svetlana
2022-12-05 16:02:57 +03:00
parent 78dcd9065c
commit b2e5f6a039
2 changed files with 39 additions and 6 deletions
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37
PdfFile/lib/xpdf/Stream.cc
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@ -309,7 +309,42 @@ Stream *Stream::makeFilter(char *name, Stream *str, Object *params,
globals.free();
} else if (!strcmp(name, "JPXDecode")) {
#ifdef USE_EXTERNAL_JPEG2000
str = new JPXStream2(str);
// check_j2000_type, openjpeg support
str->reset();
bool bOpenJpegSupport = false;
unsigned char pBuffer[32] = {0};
for (int i = 0; i < 32; ++i)
{
int nCurrentChar = str->getChar();
if (EOF == nCurrentChar)
break;
pBuffer[i] = nCurrentChar;
}
if (0x00 == pBuffer[0] && 0x00 == pBuffer[1] && 0x00 == pBuffer[2] && 0x0c == pBuffer[3]
&& 0x6a == pBuffer[4] && 0x50 == pBuffer[5] && 0x20 == pBuffer[6] && 0x20 == pBuffer[7]
&& 0x0d == pBuffer[8] && 0x0a == pBuffer[9] && 0x87 == pBuffer[10] && 0x0a == pBuffer[11]
&& 0x00 == pBuffer[12] && 0x00 == pBuffer[13] && 0x00 == pBuffer[14]
&& 0x66 == pBuffer[16] && 0x74 == pBuffer[17] && 0x79 == pBuffer[18] && 0x70 == pBuffer[19]
&& 0x6a == pBuffer[20] && 0x70 == pBuffer[21] && 0x32 == pBuffer[22] && 0x20 == pBuffer[23]
&& 0x00 == pBuffer[24] && 0x00 == pBuffer[25] && 0x00 == pBuffer[26] && 0x00 == pBuffer[27]) {
bOpenJpegSupport = true; // JP2
} else if (0xff == pBuffer[0] && 0x4f == pBuffer[1] && 0xff == pBuffer[2] && 0x51 == pBuffer[3]) {
bOpenJpegSupport = true; // J2K
} else if (0x00 == pBuffer[0] && 0x00 == pBuffer[1] && 0x00 == pBuffer[2] && 0x0c == pBuffer[3]
&& 0x6a == pBuffer[4] && 0x50 == pBuffer[5] && 0x20 == pBuffer[6] && 0x20 == pBuffer[7]
&& 0x0d == pBuffer[8] && 0x0a == pBuffer[9] && 0x87 == pBuffer[10] && 0x0a == pBuffer[11]
&& 0x00 == pBuffer[12] && 0x00 == pBuffer[13] && 0x00 == pBuffer[14] && 0x18 == pBuffer[15]
&& 0x66 == pBuffer[16] && 0x74 == pBuffer[17] && 0x79 == pBuffer[18] && 0x70 == pBuffer[19]
&& 0x6d == pBuffer[20] && 0x6a == pBuffer[21] && 0x70 == pBuffer[22] && 0x32 == pBuffer[23]
&& 0x00 == pBuffer[24] && 0x00 == pBuffer[25] && 0x00 == pBuffer[26] && 0x00 == pBuffer[27]
&& 0x6d == pBuffer[28] && 0x6a == pBuffer[29] && 0x70 == pBuffer[30] && 0x32 == pBuffer[31]) {
bOpenJpegSupport = true; // JPT
}
str->reset();
if (bOpenJpegSupport)
str = new JPXStream2(str);
else
str = new JPXStream(str);
#else
str = new JPXStream(str);
#endif