e85d191b46
- merge v0.01 --> Añadido fileselector - Añadidas fuentes de Gem y Pure Data - pix2jpg incluído en Gem. Archivos de construcción de Gem modificados. - Añadido fichero ompiling.txt con instrucciones de compilación
697 lines
17 KiB
C++
697 lines
17 KiB
C++
/*
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* fastimg -
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* Faster reading and writing of image files.
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*
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* This code should work on machines with any byte order.
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*
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* Could someone make this run real fast using multiple processors
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* or how about using memory mapped files to speed it up?
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*
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* Paul Haeberli - 1991
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*/
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/*
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* porting to Windows NT
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* Masayuki Mastumoto - 1995
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*/
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/*
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* Modified so that it doesn't exit on error.
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* Added support for reading grayscale, rgb, and rgba images
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* Mark Danks - 1998
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*/
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// FIXXME: use C++ memory allocators
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#include <stdlib.h>
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#include "sgiimage.h"
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#ifndef _WIN32
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# include <unistd.h>
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#endif // for !win32
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#include <string.h>
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#include <stdio.h>
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#include "Gem/RTE.h"
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//#include "m_pd.h"
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/*
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* from image.h
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*
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*/
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typedef struct {
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unsigned short imagic; /* stuff saved on disk . . */
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unsigned short type;
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unsigned short dim;
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unsigned short xsize;
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unsigned short ysize;
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unsigned short zsize;
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unsigned int32 min;
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unsigned int32 max;
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unsigned int32 wastebytes;
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char name[80];
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unsigned int32 colormap;
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int32 file; /* stuff used in core only */
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unsigned short flags;
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short dorev;
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short x;
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short y;
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short z;
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short cnt;
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unsigned short *ptr;
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unsigned short *base;
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unsigned short *tmpbuf;
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unsigned int32 offset;
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unsigned int32 rleend; /* for rle images */
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unsigned int32 *rowstart; /* for rle images */
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int32 *rowsize; /* for rle images */
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} IMAGE;
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#define IMAGIC 0732
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#define TYPEMASK 0xff00
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#define BPPMASK 0x00ff
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#define ITYPE_VERBATIM 0x0000
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#define ITYPE_RLE 0x0100
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#define ISRLE(type) (((type) & 0xff00) == ITYPE_RLE)
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#define ISVERBATIM(type) (((type) & 0xff00) == ITYPE_VERBATIM)
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#define BPP(type) ((type) & BPPMASK)
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#define RLE(bpp) (ITYPE_RLE | (bpp))
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#define VERBATIM(bpp) (ITYPE_VERBATIM | (bpp))
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/*
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* end of image.h stuff
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*
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*/
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#define RINTLUM (79)
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#define GINTLUM (156)
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#define BINTLUM (21)
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#define ILUM(r,g,b) (static_cast<int>(RINTLUM*(r)+GINTLUM*(g)+BINTLUM*(b))>>8)
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#define OFFSET_R 3 /* this is byte order dependent */
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#define OFFSET_G 2
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#define OFFSET_B 1
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#define OFFSET_A 0
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#define CHANOFFSET(z) (3-(z)) /* this is byte order dependent */
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static void expandrow(unsigned char *optr, unsigned char *iptr, int32 z);
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static void setalpha(unsigned char *lptr, int32 n);
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static void copybw(int32 *lptr, int32 n);
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static void lumrow(unsigned char *rgbptr, unsigned char *lumptr, int32 n);
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static int compressrow(unsigned char *lbuf, unsigned char *rlebuf, int32 z, int32 cnt);
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static void interleaverow(unsigned char *lptr, unsigned char *cptr, int32 z, int32 n);
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#define TAGLEN (5)
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/*
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* addlongimgtag -
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* this is used to extract image data from core dumps.
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*
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*/
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unsigned int32 *
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getLongImage(const char *textureFile, int32 *xsize, int32 *ysize, int32 *csize)
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{
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sizeofimage(textureFile, xsize, ysize, csize);
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return longimagedata(textureFile);
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}
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void addlongimgtag(unsigned int32 *dptr, int32 xsize, int32 ysize)
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{
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dptr = dptr+(xsize*ysize);
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dptr[0] = 0x12345678;
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dptr[1] = 0x59493333;
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dptr[2] = 0x69434222;
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dptr[3] = xsize;
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dptr[4] = ysize;
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}
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/*
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* byte order independent read/write of shorts and longs.
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*
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*/
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static unsigned short getshort(FILE *inf)
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{
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unsigned char buf[2];
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size_t count=fread(buf,2,1,inf);
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if(count<1){error("error reading file"); return 0;}
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return (buf[0]<<8)+(buf[1]<<0);
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}
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static unsigned int32 getlong(FILE *inf)
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{
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unsigned char buf[4];
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size_t count = fread(buf,4,1,inf);
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if(count<1){error("error reading file"); return 0;}
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return (buf[0]<<24)+(buf[1]<<16)+(buf[2]<<8)+(buf[3]<<0);
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}
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static void putshort(FILE *outf, unsigned short val)
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{
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unsigned char buf[2];
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buf[0] = (val>>8);
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buf[1] = (val>>0);
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fwrite(buf,2,1,outf);
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}
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static int putlong(FILE *outf, unsigned int32 val)
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{
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unsigned char buf[4];
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buf[0] = static_cast<unsigned char>(val>>24);
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buf[1] = static_cast<unsigned char>(val>>16);
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buf[2] = static_cast<unsigned char>(val>>8);
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buf[3] = static_cast<unsigned char>(val>>0);
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return fwrite(buf,4,1,outf);
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}
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static void readheader(FILE *inf, IMAGE *image)
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{
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memset(image, 0, sizeof(IMAGE));
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image->imagic = getshort(inf);
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image->type = getshort(inf);
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image->dim = getshort(inf);
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image->xsize = getshort(inf);
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image->ysize = getshort(inf);
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image->zsize = getshort(inf);
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}
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static int writeheader(FILE *outf, IMAGE *image)
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{
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IMAGE t;
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memset(&t, 0, sizeof(IMAGE));
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fwrite(&t,sizeof(IMAGE),1,outf);
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fseek(outf,0,SEEK_SET);
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putshort(outf,image->imagic);
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putshort(outf,image->type);
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putshort(outf,image->dim);
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putshort(outf,image->xsize);
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putshort(outf,image->ysize);
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putshort(outf,image->zsize);
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putlong(outf,image->min);
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putlong(outf,image->max);
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putlong(outf,0);
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return fwrite("no name",8,1,outf);
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}
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static int writetab(FILE *outf, unsigned int32 *tab, int32 len)
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{
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int r=0;
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while(len) {
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r = putlong(outf,*tab++);
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len -= 4;
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}
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return r;
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}
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static void readtab(FILE *inf, unsigned int32 *tab, int32 len)
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{
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while(len) {
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*tab++ = getlong(inf);
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len -= 4;
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}
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}
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/*
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* sizeofimage -
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* return the xsize and ysize of an iris image file.
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*
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*/
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int sizeofimage(const char *name, int32 *xsize, int32 *ysize, int32 *csize)
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{
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IMAGE image;
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FILE *inf;
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inf = fopen(name,"rb");
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if(!inf)
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{
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return(0);
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}
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readheader(inf,&image);
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if(image.imagic != IMAGIC)
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{
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fclose(inf);
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return(0);
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}
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*xsize = image.xsize;
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*ysize = image.ysize;
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*csize = image.zsize;
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fclose(inf);
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return(1);
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}
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/*
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* longimagedata -
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* read in a B/W RGB or RGBA iris image file and return a
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* pointer to an array of longs.
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*
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*/
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unsigned int32 *longimagedata(const char *name)
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{
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unsigned int32 *base, *lptr;
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unsigned char *rledat, *verdat;
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unsigned int32 *starttab, *lengthtab;
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FILE *inf;
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IMAGE *image;
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int y, z, tablen;
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int xsize, ysize, zsize;
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int bpp, rle, badorder;
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unsigned int rlebuflen;
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unsigned int cur;
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inf = fopen(name,"rb");
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if(!inf)
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{
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return(NULL);
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}
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image = (IMAGE *)malloc(sizeof(IMAGE));
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readheader(inf,image);
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if(image->imagic != IMAGIC)
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{
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fclose(inf);
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return(NULL);
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}
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rle = ISRLE(image->type);
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bpp = BPP(image->type);
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if(bpp != 1 )
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{
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printf("longimagedata: image must have 1 byte per pix chan\n");
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fclose(inf);
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return(NULL);
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}
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xsize = image->xsize;
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ysize = image->ysize;
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zsize = image->zsize;
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if(rle)
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{
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tablen = ysize*zsize*sizeof(int32);
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starttab = (unsigned int32 *)malloc(tablen);
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lengthtab = (unsigned int32 *)malloc(tablen);
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rlebuflen = static_cast<int32>(1.05*xsize+10);
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rledat = (unsigned char *)malloc(rlebuflen);
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fseek(inf,512,SEEK_SET);
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readtab(inf,starttab,tablen);
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readtab(inf,lengthtab,tablen);
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/* check data order */
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cur = 0;
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badorder = 0;
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for(y=0; y<ysize; y++)
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{
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for(z=0; z<zsize; z++)
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{
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if(starttab[y+z*ysize]<cur)
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{
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badorder = 1;
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break;
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}
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cur = starttab[y+z*ysize];
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}
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if(badorder)
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break;
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}
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fseek(inf,512+2*tablen,SEEK_SET);
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cur = 512+2*tablen;
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base = (unsigned int32 *)
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malloc((xsize*ysize+TAGLEN)*sizeof(int32));
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addlongimgtag(base,xsize,ysize);
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if(badorder)
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{
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for(z=0; z<zsize; z++)
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{
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lptr = base;
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for(y=0; y<ysize; y++)
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{
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if(cur != starttab[y+z*ysize])
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{
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fseek(inf,starttab[y+z*ysize],SEEK_SET);
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cur = starttab[y+z*ysize];
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}
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if(lengthtab[y+z*ysize]>rlebuflen)
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{
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printf("longimagedata: rlebuf(%d) is too small - bad poop : %d\n",rlebuflen, lengthtab[y+z*ysize]);
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return(NULL);
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}
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size_t count=fread(rledat,lengthtab[y+z*ysize],1,inf);
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if(count<1){error("error reading file"); return 0;}
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cur += lengthtab[y+z*ysize];
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#ifdef IRISGL
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expandrow((unsigned char *)lptr,(unsigned char *)rledat,3-z);
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#else
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expandrow((unsigned char *)lptr,(unsigned char *)rledat,z);
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#endif
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lptr += xsize;
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}
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}
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}
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else
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{
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lptr = base;
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for(y=0; y<ysize; y++)
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{
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for(z=0; z<zsize; z++)
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{
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if(cur != starttab[y+z*ysize])
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{
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fseek(inf,starttab[y+z*ysize],SEEK_SET);
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cur = starttab[y+z*ysize];
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}
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size_t count=fread(rledat,lengthtab[y+z*ysize],1,inf);
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if(count<1){error("error reading file"); return 0;}
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cur += lengthtab[y+z*ysize];
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#ifdef IRISGL
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expandrow((unsigned char *)lptr,(unsigned char *)rledat,3-z);
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#else
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expandrow((unsigned char *)lptr,(unsigned char *)rledat,z);
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#endif
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}
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lptr += xsize;
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}
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}
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if(zsize == 3)
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setalpha((unsigned char *)base,xsize*ysize);
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else if(zsize<3)
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copybw((int32 *)base,xsize*ysize);
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fclose(inf);
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free(starttab);
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free(lengthtab);
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free(rledat);
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free(image);
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return base;
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}
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else
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{
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base = (unsigned int32 *)
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malloc((xsize*ysize+TAGLEN)*sizeof(int32));
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addlongimgtag(base,xsize,ysize);
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verdat = (unsigned char *)malloc(xsize);
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fseek(inf,512,SEEK_SET);
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for(z=0; z<zsize; z++)
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{
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lptr = base;
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for(y=0; y<ysize; y++)
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{
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size_t count = fread(verdat,xsize,1,inf);
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if(count<1){error("error reading file"); return 0;}
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#ifdef IRISGL
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interleaverow((unsigned char *)lptr,verdat,3-z,xsize);
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#else
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interleaverow((unsigned char *)lptr,verdat,z,xsize);
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#endif
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lptr += xsize;
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}
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}
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if(zsize == 3)
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setalpha((unsigned char *)base,xsize*ysize);
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else if(zsize<3)
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copybw((int32 *)base,xsize*ysize);
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fclose(inf);
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free(verdat);
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free(image);
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return base;
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}
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}
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/* static utility functions for longimagedata */
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static void interleaverow(unsigned char *lptr, unsigned char *cptr, int32 z, int32 n)
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{
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lptr += z;
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while(n--) {
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*lptr = *cptr++;
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lptr += 4;
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}
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}
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static void copybw(int32 *lptr, int32 n)
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{
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while(n>=8) {
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lptr[0] = 0xff000000+(0x010101*(lptr[0]&0xff));
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lptr[1] = 0xff000000+(0x010101*(lptr[1]&0xff));
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lptr[2] = 0xff000000+(0x010101*(lptr[2]&0xff));
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lptr[3] = 0xff000000+(0x010101*(lptr[3]&0xff));
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lptr[4] = 0xff000000+(0x010101*(lptr[4]&0xff));
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lptr[5] = 0xff000000+(0x010101*(lptr[5]&0xff));
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lptr[6] = 0xff000000+(0x010101*(lptr[6]&0xff));
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lptr[7] = 0xff000000+(0x010101*(lptr[7]&0xff));
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lptr += 8;
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n-=8;
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}
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while(n--) {
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*lptr = 0xff000000+(0x010101*(*lptr&0xff));
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lptr++;
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}
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}
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static void setalpha(unsigned char *lptr, int32 n)
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{
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#ifndef IRISGL
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lptr +=3;
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#endif
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while(n>=8) {
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lptr[0*4] = 0xff;
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lptr[1*4] = 0xff;
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lptr[2*4] = 0xff;
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lptr[3*4] = 0xff;
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lptr[4*4] = 0xff;
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lptr[5*4] = 0xff;
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lptr[6*4] = 0xff;
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lptr[7*4] = 0xff;
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lptr += 4*8;
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n -= 8;
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}
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while(n--) {
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*lptr = 0xff;
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lptr += 4;
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}
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}
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static void expandrow(unsigned char *optr, unsigned char *iptr, int32 z)
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{
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unsigned char pixel, count;
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optr += z;
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while(1) {
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pixel = *iptr++;
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if ( !(count = (pixel & 0x7f)) )
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return;
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if(pixel & 0x80) {
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while(count>=8) {
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optr[0*4] = iptr[0];
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optr[1*4] = iptr[1];
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optr[2*4] = iptr[2];
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optr[3*4] = iptr[3];
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optr[4*4] = iptr[4];
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optr[5*4] = iptr[5];
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optr[6*4] = iptr[6];
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optr[7*4] = iptr[7];
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optr += 8*4;
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iptr += 8;
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count -= 8;
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}
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while(count--) {
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*optr = *iptr++;
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optr+=4;
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}
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} else {
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pixel = *iptr++;
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while(count>=8) {
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optr[0*4] = pixel;
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optr[1*4] = pixel;
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optr[2*4] = pixel;
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optr[3*4] = pixel;
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optr[4*4] = pixel;
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optr[5*4] = pixel;
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optr[6*4] = pixel;
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optr[7*4] = pixel;
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optr += 8*4;
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count -= 8;
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}
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while(count--) {
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*optr = pixel;
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optr+=4;
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}
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}
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}
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}
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/*
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* longstoimage -
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* copy an array of longs to an iris image file. Each long
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* represents one pixel. xsize and ysize specify the dimensions of
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* the pixel array. zsize specifies what kind of image file to
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* write out. if zsize is 1, the luminance of the pixels are
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* calculated, and a sinlge channel black and white image is saved.
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* If zsize is 3, an RGB image file is saved. If zsize is 4, an
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* RGBA image file is saved.
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*
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*/
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int longstoimage(unsigned int32 *lptr, int32 xsize, int32 ysize, int32 zsize, const char *name)
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{
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FILE *outf;
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IMAGE *image;
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int tablen, y, z, pos, len;
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int32 *starttab, *lengthtab;
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unsigned char *rlebuf;
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unsigned int32 *lumbuf;
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int rlebuflen, goodwrite;
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goodwrite = 1;
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outf = fopen(name,"wb");
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if(!outf) {
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printf("longstoimage: can't open output file\n");
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return 0;
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}
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tablen = ysize*zsize*sizeof(int32);
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image = (IMAGE *)malloc(sizeof(IMAGE));
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starttab = (int32 *)malloc(tablen);
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lengthtab = (int32 *)malloc(tablen);
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rlebuflen = static_cast<int32>(1.05*xsize+10);
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rlebuf = (unsigned char *)malloc(rlebuflen);
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lumbuf = (unsigned int32 *)malloc(xsize*sizeof(int32));
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memset(image,0,sizeof(IMAGE));
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image->imagic = IMAGIC;
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image->type = RLE(1);
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if(zsize>1)
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image->dim = 3;
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else
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image->dim = 2;
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image->xsize = static_cast<unsigned short>(xsize);
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image->ysize = static_cast<unsigned short>(ysize);
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image->zsize = static_cast<unsigned short>(zsize);
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image->min = 0;
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image->max = 255;
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goodwrite *= writeheader(outf,image);
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fseek(outf,512+2*tablen,SEEK_SET);
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pos = 512+2*tablen;
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for(y=0; y<ysize; y++) {
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for(z=0; z<zsize; z++) {
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if(zsize == 1) {
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lumrow((unsigned char *)lptr,(unsigned char *)lumbuf,xsize);
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#ifdef IRISGL
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len = compressrow((unsigned char *)lumbuf,rlebuf,CHANOFFSET(z),xsize);
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#else
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len = compressrow((unsigned char *)lumbuf,rlebuf,CHANOFFSET(3-z),xsize);
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#endif
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} else {
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|
#ifdef IRISGL
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|
len = compressrow((unsigned char *)lptr,rlebuf,CHANOFFSET(z),xsize);
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#else
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len = compressrow((unsigned char *)lptr,rlebuf,CHANOFFSET(3-z),xsize);
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|
#endif
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}
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|
if(len>rlebuflen) {
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|
printf("longstoimage: rlebuf is too small - bad poop\n");
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goodwrite=0;
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|
goto longstoimage_close;
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|
}
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|
goodwrite *= fwrite(rlebuf,len,1,outf);
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starttab[y+z*ysize] = pos;
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|
lengthtab[y+z*ysize] = len;
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|
pos += len;
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}
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|
lptr += xsize;
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|
}
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|
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|
fseek(outf,512,SEEK_SET);
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|
goodwrite *= writetab(outf,(unsigned int32 *)starttab,tablen);
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goodwrite *= writetab(outf,(unsigned int32 *)lengthtab,tablen);
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longstoimage_close:
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free(image);
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free(starttab);
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free(lengthtab);
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free(rlebuf);
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free(lumbuf);
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fclose(outf);
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|
if(goodwrite)
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|
return 1;
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|
else {
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|
printf("longstoimage: not enough space for image!!\n");
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|
return 0;
|
|
}
|
|
}
|
|
|
|
/* static utility functions for longstoimage */
|
|
|
|
static void lumrow(unsigned char *rgbptr, unsigned char *lumptr, int32 n)
|
|
{
|
|
lumptr += CHANOFFSET(0);
|
|
while(n--) {
|
|
*lumptr = ILUM(rgbptr[OFFSET_R],rgbptr[OFFSET_G],rgbptr[OFFSET_B]);
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|
lumptr += 4;
|
|
rgbptr += 4;
|
|
}
|
|
}
|
|
|
|
static int compressrow(unsigned char *lbuf, unsigned char *rlebuf, int32 z, int32 cnt)
|
|
{
|
|
unsigned char *iptr, *ibufend, *sptr, *optr;
|
|
short todo, cc;
|
|
int32 count;
|
|
|
|
lbuf += z;
|
|
iptr = lbuf;
|
|
ibufend = iptr+cnt*4;
|
|
optr = rlebuf;
|
|
|
|
while(iptr<ibufend) {
|
|
sptr = iptr;
|
|
iptr += 8;
|
|
while((iptr<ibufend)&& ((iptr[-8]!=iptr[-4])||(iptr[-4]!=iptr[0])))
|
|
iptr+=4;
|
|
iptr -= 8;
|
|
count = (iptr-sptr)/4;
|
|
while(count) {
|
|
todo = static_cast<short>((count > 126) ? 126 : count);
|
|
count -= todo;
|
|
*optr++ = 0x80|todo;
|
|
while(todo>8) {
|
|
optr[0] = sptr[0*4];
|
|
optr[1] = sptr[1*4];
|
|
optr[2] = sptr[2*4];
|
|
optr[3] = sptr[3*4];
|
|
optr[4] = sptr[4*4];
|
|
optr[5] = sptr[5*4];
|
|
optr[6] = sptr[6*4];
|
|
optr[7] = sptr[7*4];
|
|
optr += 8;
|
|
sptr += 8*4;
|
|
todo -= 8;
|
|
}
|
|
while(todo--) {
|
|
*optr++ = *sptr;
|
|
sptr += 4;
|
|
}
|
|
}
|
|
sptr = iptr;
|
|
cc = *iptr;
|
|
iptr += 4;
|
|
while( (iptr<ibufend) && (*iptr == cc) )
|
|
iptr += 4;
|
|
count = (iptr-sptr)/4;
|
|
while(count) {
|
|
todo = static_cast<short>(count>126 ? 126:count);
|
|
count -= todo;
|
|
*optr++ = static_cast<unsigned char>(todo);
|
|
*optr++ = static_cast<unsigned char>(cc);
|
|
}
|
|
}
|
|
*optr++ = 0;
|
|
return optr - rlebuf;
|
|
}
|