added a special thread for making thumbnails (thumb.h thumb.cpp)
git-svn-id: svn://ttmath.org/publicrep/winix/trunk@700 e52654a7-88a9-db11-a3e9-0013d4bc506e
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228
core/thumb.cpp
Executable file
228
core/thumb.cpp
Executable file
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/*
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* This file is a part of Winix
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* and is not publicly distributed
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*
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* Copyright (c) 2010, Tomasz Sowa
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* All rights reserved.
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*
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*/
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#include "thumb.h"
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#include "utf8.h"
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#include "log.h"
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void Thumb::SetConvertCmd(const std::wstring & cmd)
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{
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convert_cmd = cmd;
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}
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void Thumb::SetDb(Db * pdb)
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{
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db = pdb;
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}
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// first thread (objects locked)
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void Thumb::CreateThumb(long item_id, const std::wstring & source, const std::wstring & dst, size_t cx, size_t cy, int aspect_mode)
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{
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item_temp.item_id = item_id;
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item_temp.source = source;
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item_temp.dst = dst;
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item_temp.cx = cx;
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item_temp.cy = cy;
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item_temp.aspect_mode = aspect_mode;
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thumb_tab.insert(thumb_tab.end(), item_temp);
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WakeUpThread();
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}
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// second thread (objects locked)
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bool Thumb::SignalReceived()
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{
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return !thumb_tab.empty();
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}
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// second thread (objects not locked)
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void Thumb::Do()
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{
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ThumbTab::iterator i;
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bool end;
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Lock();
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i = thumb_tab.begin();
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Unlock();
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do
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{
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Lock();
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if( i != thumb_tab.end() )
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{
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item_work = *i;
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thumb_tab.erase(i++);
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end = false;
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}
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else
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{
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end = true;
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}
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Unlock();
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if( !end )
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CreateThumbnail();
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}
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while( !end );
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}
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void Thumb::EscapePath(const std::string & path)
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{
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command << '"';
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for(size_t i=0 ; i<path.size() ; ++i)
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{
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if( path[i] == '"' )
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command << '\\';
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command << path[i];
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}
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command << "\" ";
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}
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/*
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from: http://www.imagemagick.org/script/command-line-processing.php#geometry
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scale% Height and width both scaled by specified percentage.
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scale-x%xscale-y% Height and width individually scaled by specified percentages. (Only one % symbol needed.)
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width Width given, height automagically selected to preserve aspect ratio.
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xheight Height given, width automagically selected to preserve aspect ratio.
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widthxheight Maximum values of height and width given, aspect ratio preserved.
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widthxheight^ Minimum values of width and height given, aspect ratio preserved.
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widthxheight! Width and height emphatically given, original aspect ratio ignored.
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widthxheight> Change as per widthxheight but only if an image dimension exceeds a specified dimension.
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widthxheight< Change dimensions only if both image dimensions exceed specified dimensions.
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*/
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void Thumb::SelectAspect()
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{
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switch( item_work.aspect_mode )
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{
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case WINIX_THUMB_MODE_1:
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command << item_work.cx;
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break;
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case WINIX_THUMB_MODE_3:
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command << item_work.cx << "x" << item_work.cy;
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break;
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case WINIX_THUMB_MODE_4:
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command << '"' << item_work.cx << "x" << item_work.cy << "^\"";
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break;
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case WINIX_THUMB_MODE_5:
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command << '"' << item_work.cx << "x" << item_work.cy << "!\"";
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break;
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case WINIX_THUMB_MODE_6:
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command << '"' << item_work.cx << "x" << item_work.cy << ">\"";
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break;
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case WINIX_THUMB_MODE_7:
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command << '"' << item_work.cx << "x" << item_work.cy << "<\"";
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break;
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case WINIX_THUMB_MODE_2:
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default:
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command << "x" << item_work.cy;
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break;
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}
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}
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// second thread (objects are not locked)
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void Thumb::CreateThumbnail()
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{
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command.Clear();
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Ezc::WideToUTF8(convert_cmd, tempa);
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command << tempa << " -quiet -strip -thumbnail ";
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SelectAspect();
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command << " ";
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Ezc::WideToUTF8(item_work.source, tempa);
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EscapePath(tempa);
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Ezc::WideToUTF8(item_work.dst, tempa);
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EscapePath(tempa);
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if( system(command.CStr()) == 0 )
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{
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Lock();
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log << log3 << "Thumb: created a thumbnail: " << tempa << logend;
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db->EditHasThumbById(true, item_work.item_id);
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Unlock();
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}
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else
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{
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Lock();
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log << log3 << "Thumb: some problems with creating a thumbnail: " << tempa << logend;
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Unlock();
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}
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}
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// second thread (objects are not locked)
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// !! there is a problem with GIF files
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// Bus error (core dumped)
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/*
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#include "wand/MagickWand.h"
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// compiler options:
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// include: -I/usr/local/include/ImageMagick
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// link with: `MagickWand-config --ldflags --libs`
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void Thumb::CreateThumbnail()
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{
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Ezc::WideToUTF8(item_work.source, sourcea);
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Ezc::WideToUTF8(item_work.dst, dsta);
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MagickWandGenesis();
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MagickWand * wand = NewMagickWand();
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if( MagickReadImage(wand, sourcea.c_str()) )
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{
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MagickThumbnailImage(wand, item_work.cx, item_work.cy);
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if( MagickWriteImage(wand, dsta.c_str()) )
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{
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Lock();
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log << log3 << "Thumb: created a thumbnail: " << dsta << logend;
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Unlock();
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}
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}
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DestroyMagickWand(wand);
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MagickWandTerminus();
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}
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*/
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