ftp.nice.ch/pub/next/graphics/viewer/ToyViewer.2.6a.s.tar.gz#/ToyViewer2.6a/src/ImageOpr.bproj/resize.c

This is resize.c in view mode; [Download] [Up]

#include  <stdio.h>
#include  <libc.h>
#include  <objc/objc.h>
#include  <stdlib.h>
#include  "../common.h"
#include  "../getpixel.h"

static void resizeCopy(float factor, commonInfo *newinf,
		unsigned char *map[], unsigned char *newmap[])
{
	int i, x, y, px, nx, pnum, alp;
	int elm[MAXPLANE];
	unsigned char *pp[MAXPLANE];
	int rstab[MAXWidth];

	pnum = (newinf->numcolors == 1) ? 1 : 3;
	alp = (newinf->alpha) ? pnum : 0;
	if ((x = newinf->width) < newinf->height)
		x = newinf->height;
	for (i = 0; i < x; i++)
		rstab[i] = (float)i / factor;
	for (i = 0; i < 5; i++)
		pp[i] = newmap[i];
	for (y = 0; y < newinf->height; y++) {
		resetPixel(map, rstab[y]);
		for (px = -1, x = 0; x < newinf->width; x++) {
			for (nx = rstab[x]; px < nx; px++)
				getPixelA(elm);
			for (i = 0; i < pnum; i++)
				*pp[i]++ = elm[i];
			if (alp)
				*pp[alp]++ = elm[ALPHA];
		}
	}
}

commonInfo *makeResizedMap(float factor, commonInfo *cinf,
		unsigned char *map[], unsigned char *newmap[])
{
	commonInfo *newinf = NULL;
	unsigned char *planes[MAXPLANE];
	int pn;

	planes[0] = NULL;
	if ((newinf = (commonInfo *)malloc(sizeof(commonInfo))) == NULL)
		goto ErrEXIT;
	*newinf = *cinf;
	newinf->width = cinf->width * factor;
	newinf->height = cinf->height * factor;
	newinf->xbytes = byte_length(newinf->bits, newinf->width);
	if (newinf->cspace == NX_OneIsBlackColorSpace)
		newinf->cspace = NX_OneIsWhiteColorSpace;
	newinf->isplanar = YES;
	if (newinf->width > MAXWidth)
		goto ErrEXIT;
	newinf->palette = NULL;
	if (cinf->palette) {
		newinf->palette = copyPalette(cinf->palette, cinf->palsteps);
		if (newinf->palette == NULL)
			goto ErrEXIT;
	}
	pn = (cinf->numcolors == 1) ? 1 : 3;
	if (cinf->alpha) ++pn;
	if (allocImage(planes, newinf->width, newinf->height, 8, pn))
		goto ErrEXIT;
	if (initGetPixel(cinf) != 0)
		goto ErrEXIT;
	resizeCopy(factor, newinf, map, planes);

	if (newinf->bits == 8) {
		int i;
		for (i = 0; i < pn; i++)
			newmap[i] = planes[i];
	}else {
		if (allocImage(newmap,
			newinf->width, newinf->height, newinf->bits, pn))
			goto ErrEXIT;
		packWorkingImage(newinf, pn, planes, newmap);
		free((void *)planes[0]);
	}
	return newinf;

ErrEXIT:
	if (newinf) {
		if (newinf->palette) free((void *)newinf->palette);
		free((void *)newinf);
	}
	if (planes[0]) free((void *)planes[0]);
	return NULL;
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.