libtthimage/ptlist.c

/*
		ptlist.c
		========
	primitives for lists of picture points.
	new 1999, 2001 ?
*/

#include  <stdio.h>
#include  <string.h>
#include  <stdlib.h>

#include  "tthimage.h"

/*::------------------------------------------------------------------::*/
int
Image_print_point(Image_Point *ppt)
{
printf(" xy %-4d %-4d  c %-3d  h %d\n", ppt->x, ppt->y, ppt->c, ppt->h);
return FUNC_IS_ALPHA;
}
/*::------------------------------------------------------------------::*/
int
Image_ptl_dump(Image_PtList *pl, char *txt)
{
fprintf(stderr, "---+---------------\n");
fprintf(stderr, "   |  %s\n", txt);
fprintf(stderr, "   | ptlist @ %p\n", pl);
fprintf(stderr, "   | w %d  h %d\n", pl->width, pl->height);
fprintf(stderr, "   | name '%s'\n", pl->name);
fprintf(stderr, "   | nbre %d alloc %d\n", pl->nbre, pl->alloc);
fprintf(stderr, "---+---------------\n");
return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
Image_PtList *
Image_ptl_alloc(int nbre, char *name)
{
Image_PtList *ptr;

#if DEBUG_LEVEL
fprintf(stderr, "Image PtList: alloc: %d '%s'\n", nbre, name);
#endif

if ( (ptr=malloc(sizeof(Image_PtList)))==NULL)
	{
	fprintf(stderr, "Image PtList: struct malloc failed\n");
#if FORCE_ABORT
	abort();
#endif
	return NULL;
	}

ptr->control = 0xfde9601a;	/* oh, a fucking magic number */
ptr->width = ptr->height = 0;
ptr->nbre = 0;
ptr->alloc = nbre;
if (strlen(name) < IMG_OBJNAME_LEN)
	strcpy(ptr->name, name);
else
	strcpy(ptr->name, "name too long");

if ( (ptr->points=malloc(sizeof(Image_Point)*nbre))==NULL)
	{
	fprintf(stderr, "Image PtList: array malloc failed\n");
#if FORCE_ABORT
	abort();
#endif
	return NULL;
	}

return ptr;
}
/*::------------------------------------------------------------------::*/
int
Image_ptl_add(Image_PtList *ptl, int x, int y, int h, int c)
{
Image_Point *ptrpt;
int newsize, idx;

#if DEBUG_LEVEL > 2
fprintf(stderr, "Image PtList: addpt to %p: %5d %5d %5d %5d\n",
				 ptl, x, y, h, c);
#endif

/* in first, we check if this is a valid point list */

if (ptl->control != 0xfde9601a)
	{
	fprintf(stderr, "ptl addpt: invalid point list %p\n", ptl);
#if FORCE_ABORT
	abort();
#endif
	return FULL_NUCKED;
	}
/*
 * in second, we check if we have room for the new point.
 */
if (ptl->nbre==ptl->alloc)
	{
	newsize = ptl->alloc + 200;
	fprintf(stderr, "ptl: realloc array %d\n", newsize);
	if ((ptrpt=realloc(ptl->points, sizeof(Image_Point)*newsize))==NULL)
		{
		fprintf(stderr, "%s: REALLOC FAIL\n", __func__);
		exit(5);
		}
	ptl->points = ptrpt;
	ptl->alloc = newsize;
	}

idx = ptl->nbre;
ptl->points[idx].x = x;
ptl->points[idx].y = y;
ptl->points[idx].h = h;
ptl->points[idx].c = c;
ptl->nbre = idx + 1;

return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
/*
 *	attention, il est _important_ de respecter le format d'<EFBFBD>criture
 *	parce que les fichiers de liste de points sont parfois relus par
 *	des programmes FORTRAN, beaucoup plus pointilleux sur le 
 *	formatage des donn<EFBFBD>es.
 */
int
Image_ptl_write(char *filename, Image_PtList *ptl)
{
FILE	*fp;
int	foo;

if ( (fp=fopen(filename, "w"))==NULL )
	{
	fprintf(stderr, "Image PtList: write: fopen fail.\n");
	return FILE_CREATE_ERR;
	}

fprintf(fp, "%8d\n", ptl->nbre);
fprintf(fp, "%08d%08d\n", ptl->width, ptl->height);
fprintf(fp, "%08d%08d\n", 42, 42);			/* reserved */
for (foo=0; foo<ptl->nbre; foo++)
	{
	fprintf(fp, "%8d%8d%8d%8d\n",
				ptl->points[foo].x, ptl->points[foo].y,
				ptl->points[foo].h, ptl->points[foo].c);
	}

fclose(fp);

return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
int
Image_ptl_read(char *filename, Image_PtList *ptl)
{
FILE	*fp;
int	foo;

#if DEBUG_LEVEL
fprintf(stderr, "%s ( '%s' %p )\n", __func__, filename, ptl);
#endif

if (ptl->control != 0xfde9601a)
	{
	fprintf(stderr, "%s: no deadbeef in %p\n", __func__, ptl);
	return 666;
	}

/* doit-on utiliser un "must_open" ici ? */


return FULL_NUCKED;
}
/*::------------------------------------------------------------------::*/
/*		destruction d'une liste de points			*/
int
Image_ptl_kill(Image_PtList *ptl, char *msg)
{
#if DEBUG_LEVEL
fprintf(stderr, "Killing point list %p for '%s'\n", ptl, msg);
#endif

if (ptl->control != 0xfde9601a)
	{
	fprintf(stderr, "%s: no deadbeef in %p\n", __func__, ptl);
	return 666;
	}

/* killing the array */
free(ptl->points);	ptl->points = NULL;
ptl->control = 0;

/* killing the struct */
free(ptl);

return FULL_NUCKED;
}
/*::------------------------------------------------------------------::*/
int
Image_ptl_get_size(Image_PtList *ptl, int *nbre, int *alloc)
{
if (ptl->control != 0xfde9601a)
	{
	fprintf(stderr, "%s: no deadbeef in %p\n", __func__, ptl);
	return 666;
	}
if (NULL != nbre)		*nbre = ptl->nbre;
if (NULL != alloc)		*alloc = ptl->alloc;

return OLL_KORRECT;
}
/*::------------------------------------------------------------------::*/
int 
Image_ptl_get_point(Image_PtList *ptl, Image_Point *pt, int idx)
{
if (ptl->control != 0xfde9601a)
	{
	fprintf(stderr, "%s: no deadbeef in %p\n", __func__, ptl);
	return 666;
	}
if (idx < 0)
	{
	fprintf(stderr, "%s:%s point idx %d is negative, so bad !\n",
			__FILE__, __func__, idx);
	return FULL_NUCKED;
	}	
if (idx>ptl->nbre)
	{
	fprintf(stderr, "%s:%s point idx %d is too big, so bad !\n",
			__FILE__, __func__, idx);
	return FULL_NUCKED;
	}	

memcpy(pt, &(ptl->points[idx]), sizeof(Image_Point));

#if DEBUG_LEVEL > 3
fprintf(stderr, "%s: %p %d -> %d %d\n", __func__, ptl, idx, pt->x, pt->y);
#endif

return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
int
Image_ptl_boundingbox(Image_PtList *ptl, Image_Rect *box)
{
int	xmin, ymin, xmax, ymax;
int	foo;

if (ptl->control != 0xfde9601a)
	{
	fprintf(stderr, "%s: no deadbeef in %p\n", __func__, ptl);
	return 666;
	}

xmin = ymin =  999999999;
xmax = ymax = -999999999;

for (foo=0; foo<ptl->nbre; foo++)
	{
	if (ptl->points[foo].x < xmin)		xmin = ptl->points[foo].x;
	if (ptl->points[foo].x > xmax)		xmax = ptl->points[foo].x;
	if (ptl->points[foo].y < ymin)		ymin = ptl->points[foo].y;
	if (ptl->points[foo].y > ymax)		ymax = ptl->points[foo].y;
	}

box->x = xmin;			box->y = ymin;
box->w = xmax - xmin;		box->h = ymax - ymin;

#if DEBUG_LEVEL
Image_dump_rect(box, "calcul bounding box of a ptlist", 1);
#endif

return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/