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/* ============================================================
*
* This file is a part of kipi-plugins project
* http://www.kipi-plugins.org
*
* Date : 2004-06-08
* Description : Loss less JPEG files transformations.
*
* Copyright (C) 2004 by Ralf Hoelzer <kde at ralfhoelzer.com>
* Copyright (C) 2004-2005 by Marcel Wiesweg <marcel.wiesweg@gmx.de>
* Copyright (C) 2006-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
*
* NOTE: Do not use kdDebug() in this implementation because
* it will be multithreaded. Use qDebug() instead.
* See B.K.O #133026 for details.
*
* 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, 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.
*
* ============================================================ */
// C++ includes.
#include <cstdio>
#include <cstdlib>
// C Ansi includes.
extern "C"
{
#include <sys/types.h>
#include <unistd.h>
#include <setjmp.h>
#include <jpeglib.h>
}
// TQt includes.
#include <tqstring.h>
#include <tqwmatrix.h>
#include <tqfile.h>
// KDE includes.
#include <klocale.h>
#include <ktempfile.h>
// Local includes.
#include "pluginsversion.h"
#include "transupp.h"
#include "jpegtransform.h"
namespace KIPIJPEGLossLessPlugin
{
const Matrix Matrix::none ( 1, 0, 0, 1);
const Matrix Matrix::rotate90 ( 0, -1, 1, 0);
const Matrix Matrix::rotate180 (-1, 0, 0, -1);
const Matrix Matrix::rotate270 ( 0, 1, -1, 0);
const Matrix Matrix::flipHorizontal (-1, 0, 0, 1);
const Matrix Matrix::flipVertical ( 1, 0, 0, -1);
const Matrix Matrix::rotate90flipHorizontal ( 0, 1, 1, 0);
const Matrix Matrix::rotate90flipVertical ( 0, -1, -1, 0);
// To manage Errors/Warnings handling provide by libjpeg
//#define ENABLE_DEBUG_MESSAGES
struct jpegtransform_jpeg_error_mgr : public jpeg_error_mgr
{
jmp_buf setjmp_buffer;
};
static void jpegtransform_jpeg_error_exit(j_common_ptr cinfo);
static void jpegtransform_jpeg_emit_message(j_common_ptr cinfo, int msg_level);
static void jpegtransform_jpeg_output_message(j_common_ptr cinfo);
static void jpegtransform_jpeg_error_exit(j_common_ptr cinfo)
{
jpegtransform_jpeg_error_mgr* myerr = (jpegtransform_jpeg_error_mgr*) cinfo->err;
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message)(cinfo, buffer);
#ifdef ENABLE_DEBUG_MESSAGES
qDebug("%s", buffer)
#endif
longjmp(myerr->setjmp_buffer, 1);
}
static void jpegtransform_jpeg_emit_message(j_common_ptr cinfo, int msg_level)
{
Q_UNUSED(msg_level)
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message)(cinfo, buffer);
#ifdef ENABLE_DEBUG_MESSAGES
qDebug("%s (%i)", buffer, msg_level);
#endif
}
static void jpegtransform_jpeg_output_message(j_common_ptr cinfo)
{
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message)(cinfo, buffer);
#ifdef ENABLE_DEBUG_MESSAGES
qDebug("%s", buffer)
#endif
}
bool transformJPEG(const TQString& src, const TQString& destGiven,
Matrix &userAction, TQString& err)
{
//may be modified
TQString dest(destGiven);
JCOPY_OPTION copyoption = JCOPYOPT_ALL;
jpeg_transform_info transformoption;
transformoption.force_grayscale = false;
transformoption.trim = false;
struct jpeg_decompress_struct srcinfo;
struct jpeg_compress_struct dstinfo;
struct jpegtransform_jpeg_error_mgr jsrcerr, jdsterr;
jvirt_barray_ptr * src_coef_arrays;
jvirt_barray_ptr * dst_coef_arrays;
Matrix exifAction, action;
JXFORM_CODE flip, rotate;
// Initialize the JPEG decompression object with default error handling
srcinfo.err = jpeg_std_error(&jsrcerr);
srcinfo.err->error_exit = jpegtransform_jpeg_error_exit;
srcinfo.err->emit_message = jpegtransform_jpeg_emit_message;
srcinfo.err->output_message = jpegtransform_jpeg_output_message;
// Initialize the JPEG compression object with default error handling
dstinfo.err = jpeg_std_error(&jdsterr);
dstinfo.err->error_exit = jpegtransform_jpeg_error_exit;
dstinfo.err->emit_message = jpegtransform_jpeg_emit_message;
dstinfo.err->output_message = jpegtransform_jpeg_output_message;
FILE *input_file;
FILE *output_file;
input_file = fopen(TQFile::encodeName(src), "rb");
if (!input_file)
{
qDebug("ImageRotate/ImageFlip: Error in opening input file");
err = i18n("Error in opening input file");
return false;
}
output_file = fopen(TQFile::encodeName(dest), "wb");
if (!output_file)
{
fclose(input_file);
qDebug("ImageRotate/ImageFlip: Error in opening output file");
err = i18n("Error in opening output file");
return false;
}
if (setjmp(jsrcerr.setjmp_buffer) || setjmp(jdsterr.setjmp_buffer))
{
jpeg_destroy_decompress(&srcinfo);
jpeg_destroy_compress(&dstinfo);
fclose(input_file);
fclose(output_file);
return false;
}
jpeg_create_decompress(&srcinfo);
jpeg_create_compress(&dstinfo);
jpeg_stdio_src(&srcinfo, input_file);
jcopy_markers_setup(&srcinfo, copyoption);
(void) jpeg_read_header(&srcinfo, true);
// Get Exif orientation action to do.
KExiv2Iface::KExiv2 exiv2Iface;
exiv2Iface.load(src);
getExifAction(exifAction, exiv2Iface.getImageOrientation());
// Compose actions: first exif, then user
action*=exifAction;
action*=userAction;
// Convert action into flip+rotate action
convertTransform(action, flip, rotate);
qDebug("Transforming with option %i %i", flip, rotate);
if (flip == JXFORM_NONE && rotate == JXFORM_NONE)
{
err = "nothing to do"; // magic string
fclose(output_file);
fclose(input_file);
return false;
}
bool twoPass = (flip != JXFORM_NONE);
// If twoPass is true, we need another file (src -> tempFile -> destGiven)
if (twoPass)
{
KTempFile tempFile;
tempFile.setAutoDelete(false);
dest=tempFile.name();
}
output_file = fopen(TQFile::encodeName(dest), "wb");
if (!output_file)
{
fclose(input_file);
qDebug("ImageRotate/ImageFlip: Error in opening output file");
err = i18n("Error in opening output file");
return false;
}
// First rotate - execute even if rotate is JXFORM_NONE to apply new EXIF settings
transformoption.transform=rotate;
jtransform_request_workspace(&srcinfo, &transformoption);
// Read source file as DCT coefficients
src_coef_arrays = jpeg_read_coefficients(&srcinfo);
// Initialize destination compression parameters from source values
jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
src_coef_arrays, &transformoption);
// Specify data destination for compression
jpeg_stdio_dest(&dstinfo, output_file);
// Do not write a JFIF header if previously the image did not contain it
dstinfo.write_JFIF_header = false;
// Start compressor (note no image data is actually written here)
jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
// Copy to the output file any extra markers that we want to preserve
jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
jtransform_execute_transformation(&srcinfo, &dstinfo,
src_coef_arrays, &transformoption);
// Finish compression and release memory
jpeg_finish_compress(&dstinfo);
jpeg_destroy_compress(&dstinfo);
(void) jpeg_finish_decompress(&srcinfo);
jpeg_destroy_decompress(&srcinfo);
fclose(input_file);
fclose(output_file);
// Flip if needed
if (twoPass)
{
// Initialize the JPEG decompression object with default error handling
srcinfo.err = jpeg_std_error(&jsrcerr);
jpeg_create_decompress(&srcinfo);
// Initialize the JPEG compression object with default error handling
dstinfo.err = jpeg_std_error(&jdsterr);
jpeg_create_compress(&dstinfo);
input_file = fopen(TQFile::encodeName(dest), "rb");
if (!input_file)
{
qDebug("ImageRotate/ImageFlip: Error in opening input file");
err = i18n("Error in opening input file");
return false;
}
output_file = fopen(TQFile::encodeName(destGiven), "wb");
if (!output_file)
{
fclose(input_file);
qDebug("ImageRotate/ImageFlip: Error in opening output file");
err = i18n("Error in opening output file");
return false;
}
jpeg_stdio_src(&srcinfo, input_file);
jcopy_markers_setup(&srcinfo, copyoption);
(void) jpeg_read_header(&srcinfo, true);
transformoption.transform=flip;
jtransform_request_workspace(&srcinfo, &transformoption);
// Read source file as DCT coefficients
src_coef_arrays = jpeg_read_coefficients(&srcinfo);
// Initialize destination compression parameters from source values
jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
dst_coef_arrays = jtransform_adjust_parameters(&srcinfo,
&dstinfo,
src_coef_arrays,
&transformoption);
// Specify data destination for compression
jpeg_stdio_dest(&dstinfo, output_file);
// Do not write a JFIF header if previously the image did not contain it
dstinfo.write_JFIF_header = false;
// Start compressor (note no image data is actually written here)
jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
// Copy to the output file any extra markers that we want to preserve
jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
jtransform_execute_transformation(&srcinfo, &dstinfo,
src_coef_arrays, &transformoption);
// Finish compression and release memory
jpeg_finish_compress(&dstinfo);
jpeg_destroy_compress(&dstinfo);
(void) jpeg_finish_decompress(&srcinfo);
jpeg_destroy_decompress(&srcinfo);
fclose(input_file);
fclose(output_file);
// Unlink temp file
unlink(TQFile::encodeName(dest));
}
// And set finaly update the metadata to target file.
TQImage img(destGiven);
TQImage exifThumbnail = img.scale(160, 120, TQ_ScaleMin);
exiv2Iface.load(destGiven);
exiv2Iface.setImageOrientation(KExiv2Iface::KExiv2::ORIENTATION_NORMAL);
exiv2Iface.setImageProgramId(TQString("Kipi-plugins"), TQString(kipiplugins_version));
exiv2Iface.setImageDimensions(img.size());
exiv2Iface.setExifThumbnail(exifThumbnail);
exiv2Iface.save(destGiven);
return true;
}
/** Converts the mathematically correct description
into the primitive operations that can be carried out losslessly.
*/
void convertTransform(Matrix &action, JXFORM_CODE &flip, JXFORM_CODE &rotate)
{
flip = JXFORM_NONE;
rotate = JXFORM_NONE;
if (action == Matrix::rotate90)
{
rotate = JXFORM_ROT_90;
}
else if (action == Matrix::rotate180)
{
rotate = JXFORM_ROT_180;
}
else if (action == Matrix::rotate270)
{
rotate = JXFORM_ROT_270;
}
else if (action == Matrix::flipHorizontal)
{
flip = JXFORM_FLIP_H;
}
else if (action == Matrix::flipVertical)
{
flip = JXFORM_FLIP_V;
}
else if (action == Matrix::rotate90flipHorizontal)
{
//first rotate, then flip!
rotate = JXFORM_ROT_90;
flip = JXFORM_FLIP_H;
}
else if (action == Matrix::rotate90flipVertical)
{
//first rotate, then flip!
rotate = JXFORM_ROT_90;
flip = JXFORM_FLIP_V;
}
}
void getExifAction(Matrix &action, KExiv2Iface::KExiv2::ImageOrientation exifOrientation)
{
switch (exifOrientation)
{
case KExiv2Iface::KExiv2::ORIENTATION_NORMAL:
break;
case KExiv2Iface::KExiv2::ORIENTATION_HFLIP:
action*=Matrix::flipHorizontal;
break;
case KExiv2Iface::KExiv2::ORIENTATION_ROT_180:
action*=Matrix::rotate180;
break;
case KExiv2Iface::KExiv2::ORIENTATION_VFLIP:
action*=Matrix::flipVertical;
break;
case KExiv2Iface::KExiv2::ORIENTATION_ROT_90_HFLIP:
action*=Matrix::rotate90flipHorizontal;
break;
case KExiv2Iface::KExiv2::ORIENTATION_ROT_90:
action*=Matrix::rotate90;
break;
case KExiv2Iface::KExiv2::ORIENTATION_ROT_90_VFLIP:
action*=Matrix::rotate90flipVertical;
break;
case KExiv2Iface::KExiv2::ORIENTATION_ROT_270:
action*=Matrix::rotate270;
break;
case KExiv2Iface::KExiv2::ORIENTATION_UNSPECIFIED:
action*=Matrix::none;
break;
}
}
} // NameSpace KIPIJPEGLossLessPlugin
|