From 47d455dd55be855e4cc691c32f687f723d9247ee Mon Sep 17 00:00:00 2001 From: toma Date: Wed, 25 Nov 2009 17:56:58 +0000 Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features. BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da --- kviewshell/plugins/djvu/libdjvu/JPEGDecoder.cpp | 413 ++++++++++++++++++++++++ 1 file changed, 413 insertions(+) create mode 100644 kviewshell/plugins/djvu/libdjvu/JPEGDecoder.cpp (limited to 'kviewshell/plugins/djvu/libdjvu/JPEGDecoder.cpp') diff --git a/kviewshell/plugins/djvu/libdjvu/JPEGDecoder.cpp b/kviewshell/plugins/djvu/libdjvu/JPEGDecoder.cpp new file mode 100644 index 00000000..3f611965 --- /dev/null +++ b/kviewshell/plugins/djvu/libdjvu/JPEGDecoder.cpp @@ -0,0 +1,413 @@ +//C- -*- C++ -*- +//C- ------------------------------------------------------------------- +//C- DjVuLibre-3.5 +//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun. +//C- Copyright (c) 2001 AT&T +//C- +//C- This software is subject to, and may be distributed under, the +//C- GNU General Public License, Version 2. The license should have +//C- accompanied the software or you may obtain a copy of the license +//C- from the Free Software Foundation at http://www.fsf.org . +//C- +//C- This program is distributed in the hope that it will be useful, +//C- but WITHOUT ANY WARRANTY; without even the implied warranty of +//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +//C- GNU General Public License for more details. +//C- +//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library +//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech +//C- Software authorized us to replace the original DjVu(r) Reference +//C- Library notice by the following text (see doc/lizard2002.djvu): +//C- +//C- ------------------------------------------------------------------ +//C- | DjVu (r) Reference Library (v. 3.5) +//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved. +//C- | The DjVu Reference Library is protected by U.S. Pat. No. +//C- | 6,058,214 and patents pending. +//C- | +//C- | This software is subject to, and may be distributed under, the +//C- | GNU General Public License, Version 2. The license should have +//C- | accompanied the software or you may obtain a copy of the license +//C- | from the Free Software Foundation at http://www.fsf.org . +//C- | +//C- | The computer code originally released by LizardTech under this +//C- | license and unmodified by other parties is deemed "the LIZARDTECH +//C- | ORIGINAL CODE." Subject to any third party intellectual property +//C- | claims, LizardTech grants recipient a worldwide, royalty-free, +//C- | non-exclusive license to make, use, sell, or otherwise dispose of +//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the +//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU +//C- | General Public License. This grant only confers the right to +//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to +//C- | the extent such infringement is reasonably necessary to enable +//C- | recipient to make, have made, practice, sell, or otherwise dispose +//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to +//C- | any greater extent that may be necessary to utilize further +//C- | modifications or combinations. +//C- | +//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY +//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED +//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF +//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. +//C- +------------------------------------------------------------------ +// +// $Id: JPEGDecoder.cpp,v 1.8 2003/11/07 22:08:22 leonb Exp $ +// $Name: release_3_5_15 $ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif +#if NEED_GNUG_PRAGMAS +# pragma implementation +#endif + +#ifdef NEED_JPEG_DECODER + +#include "JPEGDecoder.h" + +#ifdef __cplusplus +extern "C" { +#endif +#undef HAVE_STDLIB_H +#undef HAVE_STDDEF_H +#include +#include +#include +#include +#ifdef __cplusplus +} +#endif + +#include "ByteStream.h" +#include "GPixmap.h" +#ifdef LIBJPEGNAME +#include "DjVuDynamic.h" +#include "GString.h" +#endif // LIBJPEGNAME + + + +#ifdef HAVE_NAMESPACES +namespace DJVU { +# ifdef NOT_DEFINED // Just to fool emacs c++ mode +} +#endif +#endif + + +class JPEGDecoder::Impl : public JPEGDecoder +{ +public: + static void jpeg_byte_stream_src(j_decompress_ptr, ByteStream &); +}; + +extern "C" +{ + +struct djvu_error_mgr +{ + struct jpeg_error_mgr pub; /* "public" fields */ + + jmp_buf setjmp_buffer; /* for return to caller */ +}; + +typedef struct djvu_error_mgr * djvu_error_ptr; + +METHODDEF(void) +djvu_error_exit (j_common_ptr cinfo) +{ + /* cinfo->err really points to a djvu_error_mgr struct, so coerce pointer */ + djvu_error_ptr djvuerr = (djvu_error_ptr) cinfo->err; + + /* Always display the message. */ + /* We could postpone this until after returning, if we chose. */ + (*cinfo->err->output_message) (cinfo); + + /* Return control to the setjmp point */ + longjmp(djvuerr->setjmp_buffer, 1); +} + +} + +GP +JPEGDecoder::decode(ByteStream & bs ) +{ + GP retval=GPixmap::create(); + G_TRY + { + decode(bs,*retval); + } G_CATCH_ALL + { + retval=0; + } + G_ENDCATCH; + return retval; +} + +void +JPEGDecoder::decode(ByteStream & bs,GPixmap &pix) +{ + struct jpeg_decompress_struct cinfo; + + /* We use our private extension JPEG error handler. */ + struct djvu_error_mgr jerr; + + JSAMPARRAY buffer; /* Output row buffer */ + int row_stride; /* physical row width in output buffer */ + int full_buf_size; + int isGrey,i; + + cinfo.err = jpeg_std_error(&jerr.pub); + + jerr.pub.error_exit = djvu_error_exit; + + if (setjmp(jerr.setjmp_buffer)) + { + + jpeg_destroy_decompress(&cinfo); + G_THROW( ERR_MSG("GPixmap.unk_PPM") ); + } + + jpeg_create_decompress(&cinfo); + + Impl::jpeg_byte_stream_src(&cinfo, bs); + + (void) jpeg_read_header(&cinfo, TRUE); + + jpeg_start_decompress(&cinfo); + + /* We may need to do some setup of our own at this point before reading + * the data. After jpeg_start_decompress() we have the correct scaled + * output image dimensions available, as well as the output colormap + * if we asked for color quantization. + * In this example, we need to make an output work buffer of the right size. + */ + + /* JSAMPLEs per row in output buffer */ + row_stride = cinfo.output_width * cinfo.output_components; + full_buf_size = row_stride * cinfo.output_height; + + /* Make a one-row-high sample array that will go away when done with image */ + buffer = (*cinfo.mem->alloc_sarray) + ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1); + + GP goutputBlock=ByteStream::create(); + ByteStream &outputBlock=*goutputBlock; + outputBlock.format("P6\n%d %d\n%d\n",cinfo.output_width, + cinfo.output_height,255); + + isGrey = ( cinfo.out_color_space == JCS_GRAYSCALE) ? 1 : 0; + + while (cinfo.output_scanline < cinfo.output_height) + { + (void) jpeg_read_scanlines(&cinfo, buffer, 1); + + if ( isGrey == 1 ) + { + for (i=0; isrc; + + src->start_of_stream = TRUE; +} + +METHODDEF(boolean) +fill_input_buffer (j_decompress_ptr cinfo) +{ + byte_stream_src_ptr src = (byte_stream_src_ptr) cinfo->src; + size_t nbytes; + + nbytes = src->byteStream->readall(src->buffer, INPUT_BUF_SIZE); + + if (nbytes <= 0) + { + if (src->start_of_stream) /* Treat empty input as fatal error */ + ERREXIT(cinfo, JERR_INPUT_EMPTY); + WARNMS(cinfo, JWRN_JPEG_EOF); + /* Insert a fake EOI marker */ + src->buffer[0] = (JOCTET) 0xFF; + src->buffer[1] = (JOCTET) JPEG_EOI; + nbytes = 2; + } + + src->pub.next_input_byte = src->buffer; + src->pub.bytes_in_buffer = nbytes; + src->start_of_stream = FALSE; + + return TRUE; +} + + +METHODDEF(void) +skip_input_data (j_decompress_ptr cinfo, long num_bytes) +{ + byte_stream_src_ptr src = (byte_stream_src_ptr) cinfo->src; + + if (num_bytes > (long) src->pub.bytes_in_buffer) + { + src->byteStream->seek((num_bytes - src->pub.bytes_in_buffer), SEEK_CUR); + (void) fill_input_buffer(cinfo); + }else + { + src->pub.bytes_in_buffer -= num_bytes; + src->pub.next_input_byte += num_bytes; + } +} + +METHODDEF(void) +term_source (j_decompress_ptr cinfo) +{ + /* no work necessary here */ +} + +} + +void +JPEGDecoder::Impl::jpeg_byte_stream_src(j_decompress_ptr cinfo,ByteStream &bs) +{ + byte_stream_src_ptr src; + + if (cinfo->src == NULL) + { /* first time for this JPEG object? */ + cinfo->src = (struct jpeg_source_mgr *) + (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, + sizeof(byte_stream_src_mgr)); + src = (byte_stream_src_ptr) cinfo->src; + src->buffer = (JOCTET *) + (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, + INPUT_BUF_SIZE * sizeof(JOCTET)); + } + + src = (byte_stream_src_ptr) cinfo->src; + src->pub.init_source = init_source; + src->pub.fill_input_buffer = fill_input_buffer; + src->pub.skip_input_data = skip_input_data; + src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */ + src->pub.term_source = term_source; + src->byteStream = &bs; + src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */ + src->pub.next_input_byte = NULL; /* until buffer loaded */ +} + +#ifdef LIBJPEGNAME +void * +JPEGDecoder::jpeg_lookup(const GUTF8String &name) +{ + static DjVuDynamic lib(GUTF8String(LIBJPEGNAME)); + void *sym=lib.lookup(name); + if(!sym) + G_THROW(ERR_MSG("DjVuFile.JPEG_bg2")); + return sym; +} + +jpeg_error_mgr * +JPEGDecoder::jpeg_std_error(jpeg_error_mgr *x) +{ + static void *sym=jpeg_lookup("jpeg_std_error"); + return ((jpeg_error_mgr *(*)(jpeg_error_mgr *))sym)(x); +} + +void +JPEGDecoder::jpeg_CreateDecompress(jpeg_decompress_struct *x,int v, size_t s) +{ + static void *sym=jpeg_lookup("jpeg_CreateDecompress"); + ((void (*)(jpeg_decompress_struct *,int,size_t))sym)(x,v,s); +} + +void +JPEGDecoder::jpeg_destroy_decompress(j_decompress_ptr x) +{ + static void *sym=jpeg_lookup("jpeg_destroy_decompress"); + ((void (*)(j_decompress_ptr))sym)(x); +} + +int +JPEGDecoder::jpeg_read_header(j_decompress_ptr x,boolean y) +{ + static void *sym=jpeg_lookup("jpeg_read_header"); + return ((int (*)(j_decompress_ptr,boolean))sym)(x,y); +} + +JDIMENSION +JPEGDecoder::jpeg_read_scanlines(j_decompress_ptr x,JSAMPARRAY y,JDIMENSION z) +{ + static void *sym=jpeg_lookup("jpeg_read_scanlines"); + return ((JDIMENSION (*)(j_decompress_ptr,JSAMPARRAY,JDIMENSION))sym)(x,y,z); +} + +boolean +JPEGDecoder::jpeg_finish_decompress(j_decompress_ptr x) +{ + static void *sym=jpeg_lookup("jpeg_finish_decompress"); + return ((boolean (*)(j_decompress_ptr))sym)(x); +} + +boolean +JPEGDecoder::jpeg_resync_to_restart(jpeg_decompress_struct *x,int d) +{ + static void *sym=jpeg_lookup("jpeg_resync_to_restart"); + return ((boolean (*)(jpeg_decompress_struct *,int))sym)(x,d); +} + +boolean +JPEGDecoder::jpeg_start_decompress(j_decompress_ptr x) +{ + static void *sym=jpeg_lookup("jpeg_start_decompress"); + return ((boolean (*)(j_decompress_ptr))sym)(x); +} + +#endif // LIBJPEGNAME + + +#ifdef HAVE_NAMESPACES +} +# ifndef NOT_USING_DJVU_NAMESPACE +using namespace DJVU; +# endif +#endif + +#endif + -- cgit v1.2.1