/* === S Y N F I G ========================================================= */
/*! \file trgt_jpeg.cpp
** \brief jpeg_trgt Target Module
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2007 Chris Moore
**
** This package 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 package 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.
** \endlegal
**
** === N O T E S ===========================================================
**
** ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "trgt_jpeg.h"
#include <jpeglib.h>
#include <ETL/stringf>
#include <cstdio>
#include <algorithm>
#include <functional>
#endif
/* === M A C R O S ========================================================= */
using namespace synfig;
using namespace std;
using namespace etl;
/* === G L O B A L S ======================================================= */
SYNFIG_TARGET_INIT(jpeg_trgt);
SYNFIG_TARGET_SET_NAME(jpeg_trgt,"jpeg");
SYNFIG_TARGET_SET_EXT(jpeg_trgt,"jpg");
SYNFIG_TARGET_SET_VERSION(jpeg_trgt,"0.1");
SYNFIG_TARGET_SET_CVS_ID(jpeg_trgt,"$Id$");
/* === M E T H O D S ======================================================= */
jpeg_trgt::jpeg_trgt(const char *Filename, const synfig::TargetParam ¶ms):
file(NULL),
quality(95),
cinfo(),
jerr(),
multi_image(),
ready(false),
imagecount(),
filename(Filename),
buffer(NULL),
color_buffer(NULL),
sequence_separator(params.sequence_separator)
{
set_alpha_mode(TARGET_ALPHA_MODE_FILL);
}
jpeg_trgt::~jpeg_trgt()
{
if(ready)
{
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
ready=false;
}
if(file)
fclose(file);
file=NULL;
delete [] buffer;
delete [] color_buffer;
}
bool
jpeg_trgt::set_rend_desc(RendDesc *given_desc)
{
desc=*given_desc;
imagecount=desc.get_frame_start();
if(desc.get_frame_end()-desc.get_frame_start()>0)
multi_image=true;
else
multi_image=false;
return true;
}
bool
jpeg_trgt::start_frame(synfig::ProgressCallback *callback)
{
int w=desc.get_w(),h=desc.get_h();
if(file && file!=stdout)
fclose(file);
if(filename=="-")
{
if(callback)callback->task(strprintf("(stdout) %d",imagecount).c_str());
file=stdout;
}
else if(multi_image)
{
String newfilename(filename_sans_extension(filename) +
sequence_separator +
etl::strprintf("%04d",imagecount) +
filename_extension(filename));
file=fopen(newfilename.c_str(),POPEN_BINARY_WRITE_TYPE);
if(callback)callback->task(newfilename);
}
else
{
file=fopen(filename.c_str(),POPEN_BINARY_WRITE_TYPE);
if(callback)callback->task(filename);
}
if(!file)
return false;
delete [] buffer;
buffer=new unsigned char[3*w];
delete [] color_buffer;
color_buffer=new Color[w];
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, file);
cinfo.image_width = w; /* image width and height, in pixels */
cinfo.image_height = h;
cinfo.input_components = 3; /* # of color components per pixel */
cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
/* Now use the library's routine to set default compression parameters.
* (You must set at least cinfo.in_color_space before calling this,
* since the defaults depend on the source color space.)
*/
jpeg_set_defaults(&cinfo);
/* Now you can set any non-default parameters you wish to.
* Here we just illustrate the use of quality (quantization table) scaling:
*/
jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
/* Step 4: Start compressor */
/* TRUE ensures that we will write a complete interchange-JPEG file.
* Pass TRUE unless you are very sure of what you're doing.
*/
jpeg_start_compress(&cinfo, TRUE);
ready=true;
return true;
}
void
jpeg_trgt::end_frame()
{
if(ready)
{
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
ready=false;
}
if(file && file!=stdout)
fclose(file);
file=NULL;
imagecount++;
}
Color *
jpeg_trgt::start_scanline(int /*scanline*/)
{
return color_buffer;
}
bool
jpeg_trgt::end_scanline()
{
if(!file || !ready)
return false;
color_to_pixelformat(buffer, color_buffer, PF_RGB, 0, desc.get_w());
JSAMPROW *row_pointer(&buffer);
jpeg_write_scanlines(&cinfo, row_pointer, 1);
return true;
}