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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 "imageSGI.h"
#include "Gem/RTE.h"
#include "sgiimage.h"
#include "plugins/PluginFactory.h"
using namespace gem::plugins;
REGISTER_IMAGELOADERFACTORY("SGI", imageSGI);
REGISTER_IMAGESAVERFACTORY ("SGI", imageSGI);
/////////////////////////////////////////////////////////
//
// imageSGI
//
/////////////////////////////////////////////////////////
// Constructor
//
/////////////////////////////////////////////////////////
imageSGI :: imageSGI(void)
{
}
imageSGI :: ~imageSGI(void)
{
}
/////////////////////////////////////////////////////////
// really open the file ! (OS dependent)
//
/////////////////////////////////////////////////////////
bool imageSGI :: load(std::string filename, imageStruct&result,
gem::Properties&props)
{
int32 xsize, ysize, csize;
if (!sizeofimage(filename.c_str(), &xsize, &ysize, &csize) ) {
return(false);
}
result.xsize=xsize;
result.ysize=ysize;
if (csize == 4 || csize == 3) {
result.setCsizeByFormat(GEM_RGBA);
} else if (csize == 1) {
result.setCsizeByFormat(GEM_GRAY);
} else {
fprintf(stderr,
"[GEM:imageSGI] unknown color components in SGI file: %s\n",
filename.c_str());
return(false);
}
result.reallocate();
unsigned int32 *readData = longimagedata((char *)filename.c_str());
if (!readData) {
fprintf(stderr, "[GEM:imageSGI] error reading SGI image file: %s\n",
filename.c_str());
return false;
}
unsigned char *src = reinterpret_cast<unsigned char*>(readData);
const int yStride = result.xsize * result.csize;
unsigned char *dst = &(result.data[0]) + yStride * (result.ysize - 1);
// do RGBA data
if (csize == 4) {
while (ysize--) {
unsigned char *pixels = dst;
int count = xsize;
while(count--) {
pixels[chRed] = src[0];
pixels[chGreen] = src[1];
pixels[chBlue] = src[2];
pixels[chAlpha] = src[3];
pixels += 4;
src += 4;
}
dst -= yStride;
}
} else if (csize == 3) {
// do RGB data
while (ysize--) {
unsigned char *pixels = dst;
int count = xsize;
while(count--) {
pixels[chRed] = src[0];
pixels[chGreen] = src[1];
pixels[chBlue] = src[2];
pixels[chAlpha] = 255;;
pixels += 4;
src += 4;
}
dst -= yStride;
}
} else {
// do grayscale
while (ysize--) {
unsigned char *pixels = dst;
int count = xsize;
while(count--) {
pixels[0] = src[0];
pixels++;
src += 4;
}
dst -= yStride;
}
}
free(readData);
return true;
}
bool imageSGI::save(const imageStruct&image, const std::string&filename,
const std::string&mimetype, const gem::Properties&props)
{
imageStruct img;
image.convertTo(&img, GEM_RGBA);
unsigned int32*data=(unsigned int32*)img.data;
std::string name="";
if (!props.get("imagename", name)) {
name = std::string("Gem image");
}
int result=0;
if(data) {
result=longstoimage(data, img.xsize, img.ysize, 4, filename.c_str(),
name.c_str());
}
return (0!=result);
}
float imageSGI::estimateSave(const imageStruct&img,
const std::string&filename, const std::string&mimetype,
const gem::Properties&props)
{
float result=0;
if("image/sgi" == mimetype) {
result+=100;
} else if ("image/x-rgb" == mimetype) {
result+=50;
}
if(gem::Properties::UNSET != props.type("imagename")) {
result+=1.;
}
return result;
}
void imageSGI::getWriteCapabilities(std::vector<std::string>&mimetypes,
gem::Properties&props)
{
mimetypes.clear();
props.clear();
mimetypes.push_back("image/sgi");
mimetypes.push_back("image/x-rgb"); // ??
gem::any value=std::string("");
props.set("imagename", value);
}
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