libtthimage/pnm.c

/*

	PNM aka "portable net map" functions.

	-------------------------------------------------

	14 Feb 2000: I don't know if using '-' as a filename for
	means STDOUT is really a good thing ?
	
	5 June 2001: a priori, pas de "BOUTISME" dans ces fonctions.

	2 Oct 2001: voir aussi 'pov_hf15.c' pour une sauvegarde des
	height_fields en PGM 15 bits.
	
*/

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

#include  "tthimage.h"

#define TAILLE_MAX_LIGNE 75
#define VERSION_STRING  "December 2009"

/*::------------------------------------------------------------------::*/
/*
 *	this func write a bitmap from the hight bit of the
 *	selected channel: R, G or B.
 *	Parameter 'channel' is not case sensitive.
 */
int
Image_wr_pbm_0(char *nom, Image_Desc *im, char channel)
{
FILE		*fp;
int		x, y;
int		r, g, b;
int		par_ligne;

/*
 *	maybe we can here make a sanity check on the 'channel' par ?
 */
if ( ! strcmp("-", nom))
	{
	fputs("PBM go to stdout...\n", stderr);
	fp = stdout;
	}
else
	{
#if DEBUG_LEVEL
	fprintf(stderr, "create the PBM file '%s'\n", nom);
#endif
	if ((fp=fopen(nom, "w")) == NULL)
		{
		fputs("ecriture PBM err fopen\n", stderr);
		return FILE_CREATE_ERR;
		}
	}

fprintf(fp, "P1\n %d %d\n", im->width, im->height);
fprintf(fp, "# written by libimage v %s, pnm module %s\n",
			IMAGE_VERSION_STRING, VERSION_STRING);	

if (strlen(im->name) > 0)
	{
	fprintf(fp, "# image name: %s\n", im->name);
	}

par_ligne = 0;
for (y=0; y<im->height; y++)
	{

	for (x=0; x<im->width; x++)
		{
		Image_getRGB(im, x, y, &r, &g, &b);

		switch (channel)
			{
			case 'R':	case 'r':
				if (r & 0x80)	fputs("0", fp);
				else		fputs("1", fp);
				break;

			case 'G':	case 'g':
				if (g & 0x80)	fputs("0", fp);
				else		fputs("1", fp);
				break;

			case 'B':	case 'b':
				if (b & 0x80)	fputs("0", fp);
				else		fputs("1", fp);
				break;

			default:
				fprintf(stderr, "bad channel %c\n", channel);
				break;
			}

		par_ligne += 1;
		/*
		 *   logic for limiting length of lines
		 */
		if (par_ligne > 74)
			{
			fputs("\n", fp);
			par_ligne = 0;
			}
		}
	}

#if DEBUG_LEVEL
fprintf(fp, "# hello %d times, f.m.b.l folks !\n", getpid());
#endif

fputs("\n", fp);
fclose(fp);

im->modified   = 0;

return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
/*
 *	si mode == 0 alors "ascii" sinon "rawbits"
 *	que faire si l'image a un canal 'alpha' ?
 *
 *	27 Jan 2003: En fait, le nom officiel est 'Portable Pix Map',
 *		donc le nom de la fonction est _tr<EFBFBD>s_ mal choisi.
 *
 */
int
Image_wr_pnm_0(char *nom, Image_Desc *im, int mode)
{
fprintf(stderr, "*** WARNING. Use 'Image_wr_ppm_0' now !\n");
return Image_wr_ppm_0(nom, im, mode);
}
/*
 *	27 Jan 2003: je renomme donc la fonction, et je cr<EFBFBD>e un alias
 *		pour la sacro-sainte compatibilit<EFBFBD> ascendante :)
 */
#define PPM_BUFSIZE	20000
int
Image_wr_ppm_0(char *nom, Image_Desc *im, int mode)
{
FILE	*fp;
int	par_ligne, foo, x, y, r, g, b;
#if DEBUG_LEVEL
char	buffer[PPM_BUFSIZE];
#endif

#if DEBUG_LEVEL
fprintf(stderr, "ecriture image %p dans PPM %s (mode %d)\n", im, nom, mode);
#endif

if ( ! strcmp("-", nom))
	{
	fputs("PPM go to stdout...\n", stderr);
	fp = stdout;
	}
else
	{
#if DEBUG_LEVEL
	fprintf(stderr, "create a PPM file named '%s'\n", nom);
#endif
	if ((fp=fopen(nom, "w")) == NULL)
		{
		fputs("ecriture PPM err fopen\n", stderr);
		return FILE_CREATE_ERR;
		}
	/* new December 27, 2005 */
	/* setbuffer(fp, buffer, PPM_BUFSIZE);*/
	}

fprintf(fp, "P3\n%d %d\n255\n", im->width, im->height);
fprintf(fp, "# written by libimage v %s, ppm module '%s'\n\n",
			IMAGE_VERSION_STRING, VERSION_STRING);	

if (strlen(im->name) > 0)
	{
	fprintf(fp, "# image name: %s\n", im->name);
	}

for (y=0; y<im->height; y++)
	{
	par_ligne = 0;

	for (x=0; x<im->width; x++)
		{
		/* Image_getRGB(im, x, y, &r, &g, &b); */
		r = (im->Rpix[y])[x];
		g = (im->Gpix[y])[x];
		b = (im->Bpix[y])[x];
		foo = fprintf(fp, "%d %d %d ", r, g, b);
		par_ligne += foo;
		if (par_ligne > TAILLE_MAX_LIGNE)
			{
			fputs("\n", fp);
			par_ligne = 0;
			}
		}
#if DEBUG_LEVEL
	fprintf(fp, "# end line %d\n", y);
#else
	fputs("\n", fp);
#endif
	}

if (fp != stdout)	fclose(fp);

im->modified   = 0;	

return 0;
}
/*::------------------------------------------------------------------::*/
int
Image_ppm_load_0(char *name, Image_Desc *p_ou, int reserved)
{

fprintf(stderr, "Image: charger PNM %s dans %p\n", name, p_ou);

/*
 *       bon, maintenant, on est au pied du mur, il faut
 *       parser l'en-tete.
 */

return FUNC_NOT_FINISH;
}
/*::------------------------------------------------------------------::*/
/*::------------------------------------------------------------------::*/
int
Image_wr_pgm_0(char *nom, Image_Desc *im, char channel)
{
FILE		*fp;
int		x, y, foo, pixel, par_ligne;

if ( ! strcmp("-", nom))
	{
	fputs("PGM go to stdout...\n", stderr);
	fp = stdout;
	}
else
	{
	fprintf(stderr, "create a PGM file named '%s'\n", nom);
	if ((fp=fopen(nom, "w")) == NULL)
		{
		fputs("ecriture PGM err fopen\n", stderr);
		return FILE_CREATE_ERR;
		}
	}

fprintf(fp, "P2\n%d %d\n255\n", im->width, im->height);
fprintf(fp, "\n# written by libimage v %s\n# pnm module %s\n\n",
			IMAGE_VERSION_STRING, VERSION_STRING);	

for (y=0; y<im->height; y++)
	{
	par_ligne = 0;

	for (x=0; x<im->width; x++)
		{
		switch (channel)
			{
			case 'r':	case 'R':
				pixel = Image_R_pixel(im, x, y);
				break;
			case 'g':	case 'G':
				pixel = Image_G_pixel(im, x, y);
				break;
			case 'b':	case 'B':
				pixel = Image_B_pixel(im, x, y);
				break;
			default:
				pixel = 42;
				break;
			}

		foo = fprintf(fp, "%d ", pixel);
		par_ligne += foo;

		if (par_ligne > TAILLE_MAX_LIGNE)
			{
			fputs("\n", fp);
			par_ligne = 0;
			}
		}
#if DEBUG_LEVEL
	fprintf(fp, "\n#  end of image line %d\n", y);
#else
	fputs("\n", fp);
#endif
	}

if (fp != stdout)	fclose(fp);

return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
/*
 *	oulala, il reste du travail, l<EFBFBD>...
 */
int
Image_pgm_alloc_load(char *nom)
{

fprintf(stderr, "Image_pgm_alloc_load(%s): pas fait...\n", nom);

return FULL_NUCKED;
}
/*::------------------------------------------------------------------::*/