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/***************************************************************************
sq_utils.cpp - description
-------------------
begin : Thu Aug 2 2007
copyright : (C) 2007 by Baryshev Dmitry
email : ksquirrel.iv@gmail.com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tqstring.h>
#include <ksquirrel-libs/fmt_defs.h>
#include "sq_libraryhandler.h"
#include "sq_utils.h"
#ifndef KSQUIRREL_PART
#include <kurl.h>
#include "sq_imageloader.h"
#include "sq_thumbnailinfo.h"
#include "sq_thumbnailsize.h"
#endif
#ifdef SQ_HAVE_KEXIF
#include <libkexif/kexifdata.h>
#endif
void SQ_Utils::exifRotate(const TQString &file, TQImage &im, int o)
{
#ifdef SQ_HAVE_KEXIF
im = im.xForm(SQ_Utils::exifGetMatrix(file, o));
#endif
}
TQWMatrix SQ_Utils::exifGetMatrix(const TQString &file, int o)
{
TQWMatrix matrix;
#ifdef SQ_HAVE_KEXIF
int O;
if(o == -1)
{
KExifData data;
data.readFromFile(file);
O = data.getImageQt::Orientation();
}
else
O = o;
switch(O)
{
case KExifData::HFLIP: matrix.scale(-1,1); break;
case KExifData::ROT_180: matrix.rotate(180); break;
case KExifData::VFLIP: matrix.scale(1,-1); break;
case KExifData::ROT_90_HFLIP: matrix.scale(-1,1); matrix.rotate(90); break;
case KExifData::ROT_90: matrix.rotate(90); break;
case KExifData::ROT_90_VFLIP: matrix.scale(1,-1); matrix.rotate(90); break;
case KExifData::ROT_270: matrix.rotate(270); break;
// normal rotation or unspecified
default: ;
}
#endif
return matrix;
}
TQImage SQ_Utils::scaleImage(unsigned char *im, int w, int h, int fitwithin)
{
if(w <= fitwithin && h <= fitwithin)
{
TQImage scaled(im, w, h, 32, 0, 0, TQImage::LittleEndian);
scaled.setAlphaBuffer(true);
return scaled.copy();
}
TQImage orig(im, w, h, 32, 0, 0, TQImage::LittleEndian);
orig.setAlphaBuffer(true);
// return scaled image
return SQ_Utils::scale(orig, fitwithin, fitwithin, SQ_Utils::SMOOTH_FAST, TQ_ScaleMin);
}
#ifndef KSQUIRREL_PART
bool SQ_Utils::loadThumbnail(const KURL &pixPath, SQ_Thumbnail &t)
{
SQ_LIBRARY *lib = 0;
#ifdef SQ_HAVE_KEXIF
lib = SQ_LibraryHandler::instance()->libraryForFile(pixPath.path());
bool th = false;
if(lib)
{
KExifData data;
data.readFromFile(pixPath.path());
TQImage im = data.getThumbnail();
if(!im.isNull())
{
SQ_Utils::exifRotate(TQString(), im, data.getImageQt::Orientation());
th = true;
t.w = 0;
t.h = 0;
t.mime = lib->mime;
TQString w, h;
w = im.text("Thumb::Image::Width");
h = im.text("Thumb::Image::Height");
t.w = w.toInt();
t.h = h.toInt();
if(!t.w || !t.h)
SQ_ImageLoader::instance()->tasteImage(pixPath.path(), &t.w, &t.h, lib);
t.thumbnail = SQ_Utils::scaleImage((unsigned char *)im.bits(), im.width(),
im.height(), SQ_ThumbnailSize::biggest());
t.thumbnail = t.thumbnail.swapRGB();
}
}
else
return false;
// thumbnail loaded - nothing to do,
// or load thumbnail by hands otherwise.
if(th)
return true;
#endif
fmt_info *finfo;
RGBA *all;
bool b = SQ_ImageLoader::instance()->loadImage(pixPath.path(), SQ_CodecSettings::ThumbnailLoader);
finfo = SQ_ImageLoader::instance()->info();
all = SQ_ImageLoader::instance()->bits();
// memory allocation failed in SQ_ImageLoader::loadImage()
if(!all)
return false;
// another error occured...
if(!b)
{
// if our image is partially corrupted - show it. The image
// is partially corrupted, if number of errors < number of scanlines
// and at least one page was loaded.
if(!finfo->image.size()
|| (SQ_ImageLoader::instance()->errors() == finfo->image[0].h && finfo->image.size() == 1))
{
SQ_ImageLoader::instance()->cleanup();
return false;
}
}
if(!lib) lib = SQ_LibraryHandler::instance()->libraryForFile(pixPath.path());
t.w = finfo->image[0].w;
t.h = finfo->image[0].h;
t.mime = lib->mime;
t.thumbnail = SQ_Utils::scaleImage((unsigned char *)all, finfo->image[0].w,
finfo->image[0].h, SQ_ThumbnailSize::biggest());
SQ_ImageLoader::instance()->cleanup();
// finally, rotate thumbnail using EXIF
SQ_Utils::exifRotate(pixPath.path(), t.thumbnail);
return true;
}
#endif
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