Diffstat (limited to 'noncore/graphics/opie-eye/slave/gif_slave.cpp') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/graphics/opie-eye/slave/gif_slave.cpp | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/noncore/graphics/opie-eye/slave/gif_slave.cpp b/noncore/graphics/opie-eye/slave/gif_slave.cpp new file mode 100644 index 0000000..feb69b6 --- a/dev/null +++ b/noncore/graphics/opie-eye/slave/gif_slave.cpp @@ -0,0 +1,305 @@ +#include "gif_slave.h" + +#include "thumbnailtool.h" + +#include <qimage.h> +#include <qobject.h> +#include <qfile.h> +#include <qpixmap.h> + + +PHUNK_VIEW_INTERFACE( "Gif", GifSlave ); + + +namespace { +/* +** $Id$ +** +** Minimal GIF parser, for use in extracting and setting metadata. +** Modified for standalone & KDE calling by Bryce Nesbitt +** +** TODO: +** Support gif comments that span more than one comment block. +** Verify that Unicode utf-8 is fully unmolested by this code. +** Implement gif structure verifier. +** +** Based on: GIFtrans v1.12.2 +** Copyright (C) 24.2.94 by Andreas Ley <ley@rz.uni-karlsruhe.de> +** +******************************************************************************* +** +** Original distribution site is +** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.c +** A man-page by knordlun@fltxa.helsinki.fi (Kai Nordlund) is at +** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.1 +** An online version by taylor@intuitive.com (Dave Taylor) is at +** http://www.intuitive.com/coolweb/Addons/giftrans-doc.html +** To compile for MS-DOS or OS/2, you need getopt: +** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/getopt.c +** MS-DOS executable can be found at +** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.exe +** OS/2 executable can be found at +** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.os2.exe +** A template rgb.txt for use with the MS-DOS version can be found at +** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/rgb.txt +** Additional info can be found on +** http://melmac.corp.harris.com/transparent_images.html +** +** The GIF file format is documented in +** ftp://ftp.uu.net/doc/literary/obi/Standards/Graphics/Formats/gif89a.doc.Z +** A good quick reference is at: +** http://www.goice.co.jp/member/mo/formats/gif.html +** +******************************************************************************* +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License as published by +** the Free Software Foundation; either version 2 of the License, or +** (at your option) any later version. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +** +*/ +#define SUCCESS (0) +#define FAILURE (1) + +#define READ_BINARY "r" +#define WRITE_BINARY "w" + + +static long int pos; +static char skipcomment,verbose; +char *global_comment; + +#define readword(buffer) ((buffer)[0]+256*(buffer)[1]) +#define readflag(buffer) ((buffer)?true:false) +#define hex(c) ('a'<=(c)&&(c)<='z'?(c)-'a'+10:'A'<=(c)&&(c)<='Z'?(c)-'A'+10:(c)-'0') + +static bool debug = false; +static bool output= false; + +void dump(long int, unsigned char *, size_t) { +} + +void skipdata(FILE *src) +{ + unsigned char size,buffer[256]; + + do { + pos=ftell(src); + (void)fread((void *)&size,1,1,src); + if (debug) + dump(pos,&size,1); + if (debug) { + pos=ftell(src); + (void)fread((void *)buffer,(size_t)size,1,src); + dump(pos,buffer,(size_t)size); + } + else + (void)fseek(src,(long int)size,SEEK_CUR); + } while (!feof(src)&&size>0); +} + + +void transdata(FILE *src, FILE *dest) +{ + unsigned char size,buffer[256]; + + do { + pos=ftell(src); + (void)fread((void *)&size,1,1,src); + pos=ftell(src); + (void)fread((void *)buffer,(size_t)size,1,src); + if (debug) + dump(pos,buffer,(size_t)size); + if (output) + (void)fwrite((void *)buffer,(size_t)size,1,dest); + } while (!feof(src)&&size>0); +} + +void transblock(FILE *src, FILE* dest) +{ + unsigned char size,buffer[256]; + + pos=ftell(src); + (void)fread((void *)&size,1,1,src); + if (debug) + dump(pos,&size,1); + if (output) + (void)fwrite((void *)&size,1,1,dest); + pos=ftell(src); + (void)fread((void *)buffer,(size_t)size,1,src); + if (debug) + dump(pos,buffer,(size_t)size); + if (output) + (void)fwrite((void *)buffer,(size_t)size,1,dest); +} + +void dumpcomment(FILE *src, QCString& str) +{ + unsigned char size; + + pos=ftell(src); + (void)fread((void *)&size,1,1,src); + if (debug) + dump(pos,&size,1); + str.resize( size+1 ); + (void)fread((void *)str.data(),size,1,src); + (void)fseek(src,(long int)pos,SEEK_SET); +} + + + + +int giftrans(FILE *src, FILE* dest, QString& str, bool full) +{ + unsigned char buffer[3*256],lsd[7],gct[3*256]; + unsigned int size,gct_size; + + /* Header */ + pos=ftell(src); + (void)fread((void *)buffer,6,1,src); + if (strncmp((char *)buffer,"GIF",3)) { + str = QObject::tr("Not a GIF file"); + (void)fprintf(stderr,"Not GIF file!\n"); + return(1); + } + + /* Logical Screen Descriptor */ + pos=ftell(src); + (void)fread((void *)lsd,7,1,src); + //(void)fprintf(stderr,"Logical Screen Descriptor:\n"); + str += QObject::tr("Dimensions: %1x%2\n").arg( readword(lsd) ).arg( readword(lsd+2 ) ); + //(void)fprintf(stderr,"Global Color Table Flag: %s\n",readflag(lsd[4]&0x80)); + str += QObject::tr("Depth: %1 bits\n").arg( (lsd[4]&0x70>>4 )+1); + //(void)fprintf(stderr,"Depth : %d bits\n",(lsd[4]&0x70>>4)+1); + if (lsd[4]&0x80 && full) { + str += QObject::tr("Sort Flag: %1\n" ).arg(readflag(lsd[4]&0x8) ); + str += QObject::tr("Size of Global Color Table: %1 colors\n" ).arg( 2<<(lsd[4]&0x7)); + str += QObject::tr("Background Color Index: %1\n" ).arg(lsd[5]); + } + if (lsd[6] && full) + str += QObject::tr("Pixel Aspect Ratio: %1 (Aspect Ratio %2)\n" ).arg( lsd[6] ). + arg( ((double)lsd[6]+15)/64 ); + + /* Global Color Table */ + if (lsd[4]&0x80) { + gct_size=2<<(lsd[4]&0x7); + pos=ftell(src); + (void)fread((void *)gct,gct_size,3,src); + } + + do { + pos=ftell(src); + (void)fread((void *)buffer,1,1,src); + switch (buffer[0]) { + case 0x2c: /* Image Descriptor */ + (void)fread((void *)(buffer+1),9,1,src); + /* Local Color Table */ + if (buffer[8]&0x80) { + size=2<<(buffer[8]&0x7); + pos=ftell(src); + (void)fread((void *)buffer,size,3,src); + } + /* Table Based Image Data */ + pos=ftell(src); + (void)fread((void *)buffer,1,1,src); + transdata(src,dest); + break; + case 0x21: /* Extension */ + (void)fread((void *)(buffer+1),1,1,src); + switch (buffer[1]) { + case 0xfe: /* Comment Extension */ + if (true) + { + QCString st; + dumpcomment(src, st); + str += QObject::tr("Comment: %1\n" ).arg( st ); + } + if (skipcomment) + skipdata(src); + else { + transdata(src,dest); + } + break; + case 0x01: /* Plain Text Extension */ + case 0xf9: /* Graphic Control Extension */ + case 0xff: /* Application Extension */ + default: + transblock(src,dest); + transdata(src,dest); + break; + } + break; + case 0x3b: /* Trailer (write comment just before here) */ + break; + default: + (void)fprintf(stderr,"0x%08lx: Error, unknown block 0x%02x!\n",ftell(src)-1,buffer[0]); + return(1); + } + } while (buffer[0]!=0x3b&&!feof(src)); + return(buffer[0]==0x3b?SUCCESS:FAILURE); +} + + +/****************************************************************************/ +extern void get_gif_info( const char * original_filename, QString& str, + bool full =false) +{ +FILE * infile; + + if ((infile = fopen(original_filename, READ_BINARY)) == NULL) { + fprintf(stderr, "can't open gif image '%s'\n", original_filename); + return ; + } + + output = FALSE; + verbose = TRUE; + debug = FALSE; + skipcomment = FALSE; + giftrans( infile, NULL, str, full ); + fclose( infile ); +} + +} + + +GifSlave::GifSlave() + : SlaveInterface(QStringList("gif")) +{} + +GifSlave::~GifSlave() { + +} + +QString GifSlave::iconViewName(const QString& str) { + QString st; + get_gif_info(QFile::encodeName( str ).data(), st ); + return st; +} + +QString GifSlave::fullImageInfo( const QString& str) { + QString st; + get_gif_info(QFile::encodeName( str ).data(), st, true ); + return st; +} + +QPixmap GifSlave::pixmap(const QString& path, int width, int height ) { + static QImage img; + img.load( path ); + if ( img.isNull() ) { + QPixmap pix; + return pix; + } + + return ThumbNailTool::scaleImage( img, width,height ); +} + + |