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////////////////////////////////////////////////////////
//
// GEM - Graphics Environment for Multimedia
//
// zmoelnig@iem.at
//
// Implementation file
//
// Copyright (c) 1997-1999 Mark Danks.
// Copyright (c) Günther Geiger.
// Copyright (c) 2001-2011 IOhannes m zmölnig. forum::für::umläute. IEM. zmoelnig@iem.at
// For information on usage and redistribution, and for a DISCLAIMER OF ALL
// WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
//
/////////////////////////////////////////////////////////
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include "imageSTB.h"
#include "Gem/RTE.h"
#include "plugins/PluginFactory.h"
#ifndef HAVE_LIBSTB
# define STB_IMAGE_IMPLEMENTATION
# define STB_IMAGE_WRITE_IMPLEMENTATION
#endif
#ifdef HAVE_STB_STB_IMAGE_H
# include "stb/stb_image.h"
# include "stb/stb_image_write.h"
#else
# include "stb_image.h"
# include "stb_image_write.h"
#endif
using namespace gem::plugins;
REGISTER_IMAGELOADERFACTORY("STB", imageSTB);
REGISTER_IMAGESAVERFACTORY ("STB", imageSTB);
/////////////////////////////////////////////////////////
//
// imageSTB
//
/////////////////////////////////////////////////////////
// Constructor
//
/////////////////////////////////////////////////////////
imageSTB :: imageSTB(void)
{
}
imageSTB :: ~imageSTB(void)
{
}
/////////////////////////////////////////////////////////
// really open the file ! (OS dependent)
//
/////////////////////////////////////////////////////////
bool imageSTB :: load(std::string filename, imageStruct&result,
gem::Properties&props)
{
int xsize, ysize, csize;
unsigned char *data = stbi_load(filename.c_str(), &xsize, &ysize, &csize, 4);
if(!data)
return(false);
result.xsize=xsize;
result.ysize=ysize;
result.setCsizeByFormat(GEM_RGBA);
result.reallocate();
#ifdef __APPLE__
result.fromARGB(data);
result.swapRedBlue();
#else
result.fromRGBA(data);
#endif
stbi_image_free(data);
return true;
}
bool imageSTB::save(const imageStruct&image, const std::string&filename,
const std::string&mimetype, const gem::Properties&props)
{
int err = 0;
imageStruct img;
double fquality=100;
int quality=fquality;
if(props.get("quality", fquality)) {
quality=fquality;
}
image.convertTo(&img, GEM_RGBA);
#ifdef __APPLE__
/* OSX postprocessing to get really RGBA */
img.fromABGR(img.data);
#endif /* !APPLE */
if(!img.upsidedown)
stbi_flip_vertically_on_write(1);
if("image/png" == mimetype) {
err = stbi_write_png(filename.c_str(), img.xsize, img.ysize, img.csize, img.data, img.xsize * img.csize);
} else if ("image/bmp" == mimetype) {
err = stbi_write_bmp(filename.c_str(), img.xsize, img.ysize, img.csize, img.data);
} else if ("image/targa" == mimetype) {
err = stbi_write_tga(filename.c_str(), img.xsize, img.ysize, img.csize, img.data);
} else if ("image/jpeg" == mimetype) {
err = stbi_write_jpg(filename.c_str(), img.xsize, img.ysize, img.csize, img.data, quality);
}
return (0!=err);
}
float imageSTB::estimateSave(const imageStruct&img,
const std::string&filename, const std::string&mimetype,
const gem::Properties&props)
{
float result=0;
if("image/png" == mimetype) {
result+=80;
} else if ("image/bmp" == mimetype) {
result+=80;
} else if ("image/targa" == mimetype) {
result+=80;
} else if ("image/jpeg" == mimetype) {
result+=80;
if(gem::Properties::UNSET != props.type("quality")) {
result += 1.;
}
}
return result;
}
void imageSTB::getWriteCapabilities(std::vector<std::string>&mimetypes,
gem::Properties&props)
{
mimetypes.clear();
props.clear();
mimetypes.push_back("image/png");
mimetypes.push_back("image/bmp");
mimetypes.push_back("image/targa");
mimetypes.push_back("image/jpeg");
//mimetypes.push_back("image/hdr"); // ??; expects float
gem::any value;
value=100.f;
props.set("quality", value);
}
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