diff options
Diffstat (limited to 'Build/source/libs/poppler/poppler-0.21.0/poppler/JPEG2000Stream.cc')
| -rw-r--r-- | Build/source/libs/poppler/poppler-0.21.0/poppler/JPEG2000Stream.cc | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/Build/source/libs/poppler/poppler-0.21.0/poppler/JPEG2000Stream.cc b/Build/source/libs/poppler/poppler-0.21.0/poppler/JPEG2000Stream.cc new file mode 100644 index 00000000000..e2fd8086b53 --- /dev/null +++ b/Build/source/libs/poppler/poppler-0.21.0/poppler/JPEG2000Stream.cc @@ -0,0 +1,196 @@ +//======================================================================== +// +// JPEG2000Stream.cc +// +// A JPX stream decoder using OpenJPEG +// +// Copyright 2008-2010, 2012 Albert Astals Cid <aacid@kde.org> +// Copyright 2011 Daniel Glöckner <daniel-gl@gmx.net> +// +// Licensed under GPLv2 or later +// +//======================================================================== + +#include "JPEG2000Stream.h" + +#include "config.h" + +JPXStream::JPXStream(Stream *strA) : FilterStream(strA) +{ + inited = gFalse; + image = NULL; + dinfo = NULL; + npixels = 0; + ncomps = 0; +} + +JPXStream::~JPXStream() { + delete str; + close(); +} + +void JPXStream::reset() { + counter = 0; + ccounter = 0; +} + +void JPXStream::close() { + if (image != NULL) { + opj_image_destroy(image); + image = NULL; + npixels = 0; + } + if (dinfo != NULL) { + opj_destroy_decompress(dinfo); + dinfo = NULL; + } +} + +int JPXStream::getPos() { + return counter * ncomps + ccounter; +} + +int JPXStream::getChars(int nChars, Guchar *buffer) { + for (int i = 0; i < nChars; ++i) { + const int c = doGetChar(); + if (likely(c != EOF)) buffer[i] = c; + else return i; + } + return nChars; +} + +int JPXStream::getChar() { + return doGetChar(); +} + +#define BUFFER_INITIAL_SIZE 4096 + +void JPXStream::init() +{ + Object oLen; + if (getDict()) getDict()->lookup("Length", &oLen); + + int bufSize = BUFFER_INITIAL_SIZE; + if (oLen.isInt()) bufSize = oLen.getInt(); + oLen.free(); + + + int length = 0; + unsigned char *buf = str->toUnsignedChars(&length, bufSize); + init2(buf, length, CODEC_JP2); + free(buf); + + if (image) { + npixels = image->comps[0].w * image->comps[0].h; + ncomps = image->numcomps; + for (int component = 0; component < ncomps; component++) { + if (image->comps[component].data == NULL) { + close(); + break; + } + unsigned char *cdata = (unsigned char *)image->comps[component].data; + int adjust = 0; + if (image->comps[component].prec > 8) + adjust = image->comps[component].prec - 8; + int sgndcorr = 0; + if (image->comps[component].sgnd) + sgndcorr = 1 << (image->comps[0].prec - 1); + for (int i = 0; i < npixels; i++) { + int r = image->comps[component].data[i]; + r += sgndcorr; + if (adjust) { + r = (r >> adjust)+((r >> (adjust-1))%2); + if (unlikely(r > 255)) + r = 255; + } + *(cdata++) = r; + } + } + } else + npixels = 0; + + counter = 0; + ccounter = 0; + inited = gTrue; +} + +static void libopenjpeg_error_callback(const char *msg, void * /*client_data*/) { + error(errSyntaxError, -1, "{0:s}", msg); +} + +static void libopenjpeg_warning_callback(const char *msg, void * /*client_data*/) { + error(errSyntaxWarning, -1, "{0:s}", msg); +} + +void JPXStream::init2(unsigned char *buf, int bufLen, OPJ_CODEC_FORMAT format) +{ + opj_cio_t *cio = NULL; + + /* Use default decompression parameters */ + opj_dparameters_t parameters; + opj_set_default_decoder_parameters(¶meters); +#ifdef WITH_OPENJPEG_IGNORE_PCLR_CMAP_CDEF_FLAG + parameters.flags = OPJ_DPARAMETERS_IGNORE_PCLR_CMAP_CDEF_FLAG; +#endif + + /* Configure the event manager to receive errors and warnings */ + opj_event_mgr_t event_mgr; + memset(&event_mgr, 0, sizeof(opj_event_mgr_t)); + event_mgr.error_handler = libopenjpeg_error_callback; + event_mgr.warning_handler = libopenjpeg_warning_callback; + + /* Get the decoder handle of the format */ + dinfo = opj_create_decompress(format); + if (dinfo == NULL) goto error; + + /* Catch events using our callbacks */ + opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, NULL); + + /* Setup the decoder decoding parameters */ + opj_setup_decoder(dinfo, ¶meters); + + /* Open a byte stream */ + cio = opj_cio_open((opj_common_ptr)dinfo, buf, bufLen); + if (cio == NULL) goto error; + + /* Decode the stream and fill the image structure */ + image = opj_decode(dinfo, cio); + + /* Close the byte stream */ + opj_cio_close(cio); + + if (image == NULL) goto error; + else return; + +error: + if (format == CODEC_JP2) { + error(errSyntaxWarning, -1, "Did no succeed opening JPX Stream as JP2, trying as J2K."); + init2(buf, bufLen, CODEC_J2K); + } else if (format == CODEC_J2K) { + error(errSyntaxWarning, -1, "Did no succeed opening JPX Stream as J2K, trying as JPT."); + init2(buf, bufLen, CODEC_JPT); + } else { + error(errSyntaxError, -1, "Did no succeed opening JPX Stream."); + } +} + +int JPXStream::lookChar() { + return doLookChar(); +} + +GooString *JPXStream::getPSFilter(int psLevel, const char *indent) { + return NULL; +} + +GBool JPXStream::isBinary(GBool last) { + return str->isBinary(gTrue); +} + +void JPXStream::getImageParams(int *bitsPerComponent, StreamColorSpaceMode *csMode) { + if (inited == gFalse) init(); + + *bitsPerComponent = 8; + if (image && image->numcomps == 3) *csMode = streamCSDeviceRGB; + else *csMode = streamCSDeviceGray; +} + |