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in_pnm.cpp
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in_pnm.cpp
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/*
* in_pnm.cpp -- read a NetPBM PNM bitmap file
* by [email protected] at Sat Mar 2 00:46:54 CET 2002
*
*/
#ifdef __GNUC__
#ifndef __clang__
#pragma implementation
#endif
#endif
#include "image.hpp"
#include "error.hpp"
#if USE_IN_PNM
#include "gensio.hpp"
#include "input-pnm.ci"
#include <string.h>
static Image::Sampled *in_pnm_reader(Image::Loader::UFD* ufd, SimBuffer::Flat const&) {
Image::Sampled *ret=0;
#if 0
FILE *f=((Filter::UngetFILED*)ufd)->getFILE(/*seekable:*/false);
bitmap_type bitmap=pnm_load_image(f);
#else
Filter::UngetFILED* ufdd=(Filter::UngetFILED*)ufd;
bitmap_type bitmap=pnm_load_image(ufdd);
#endif
/* Imp: Work without duplicated memory allocation */
if (BITMAP_PLANES(bitmap)==1) {
Image::Gray *img=new Image::Gray(BITMAP_WIDTH(bitmap), BITMAP_HEIGHT(bitmap), 8);
memcpy(img->getRowbeg(), BITMAP_BITS(bitmap), (slen_t)BITMAP_WIDTH(bitmap)*BITMAP_HEIGHT(bitmap));
ret=img;
} else if (BITMAP_PLANES(bitmap)==3) {
Image::RGB *img=new Image::RGB(BITMAP_WIDTH(bitmap), BITMAP_HEIGHT(bitmap), 8);
memcpy(img->getRowbeg(), BITMAP_BITS(bitmap), (slen_t)3*BITMAP_WIDTH(bitmap)*BITMAP_HEIGHT(bitmap));
/* fwrite(BITMAP_BITS(bitmap), 1, (slen_t)3*BITMAP_WIDTH(bitmap)*BITMAP_HEIGHT(bitmap), stdout); */
ret=img;
} else assert(0 && "invalid PNM depth");
delete [] BITMAP_BITS(bitmap);
if (ufdd->vi_getcc()=='P') {
ufdd->unread("P", 1);
// Error::sev(Error::NOTICE) << "PNM: loading alpha after PNM: "
// " ftell=" << ftell(f) <<
// " bytes=" << ((unsigned)bitmap.width*bitmap.height*bitmap.np) << (Error*)0;
bitmap=pnm_load_image(ufdd);
// fwrite(bitmap.bitmap,1,(unsigned)bitmap.width*bitmap.height*bitmap.np,stdout);
/* Dat: black pixel is transparent */
if (BITMAP_PLANES(bitmap)!=1) Error::sev(Error::EERROR) << "PNM: alpha must be PBM or PGM" << (Error*)0;
if (BITMAP_WIDTH(bitmap)!=ret->getWd() || BITMAP_HEIGHT(bitmap)!=ret->getHt()) {
Error::sev(Error::EERROR) << "PNM: inconsistent width or height in alpha" << (Error*)0;
}
Image::Gray *img=new Image::Gray(BITMAP_WIDTH(bitmap), BITMAP_HEIGHT(bitmap), 8);
memcpy(img->getRowbeg(), BITMAP_BITS(bitmap), (slen_t)BITMAP_WIDTH(bitmap)*BITMAP_HEIGHT(bitmap));
delete [] BITMAP_BITS(bitmap);
Image::Sampled *old=ret;
// old->packPal(); /* automatically called */
if ((ret=old->addAlpha(img))!=old) {
Error::sev(Error::NOTICE) << "PNM: loaded alpha after PNM" << (Error*)0;
delete old;
} else {
Error::sev(Error::NOTICE) << "PNM: loaded alpha, but no transparent pixels" << (Error*)0;
}
delete img;
}
/* fclose(f); */
return ret;
}
static Image::Loader::reader_t in_pnm_checker(char buf[Image::Loader::MAGIC_LEN], char [Image::Loader::MAGIC_LEN], SimBuffer::Flat const&, Image::Loader::UFD*) {
return (buf[0]=='P' && (buf[1]>='1' && buf[1]<='6') &&
(buf[2]=='\t' || buf[2]==' ' || buf[2]=='\r' || buf[2]=='\n' || buf[2]=='#'))
? in_pnm_reader : 0;
}
#else
#define in_pnm_checker NULLP
#endif /* USE_IN_PNM */
Image::Loader in_pnm_loader = { "PNM", in_pnm_checker, 0 };