libtthimage/Lib/text16x24.c

/*
 *		textes en 16x24
 *		---------------
 */

#include  <stdio.h>
#include  <stdlib.h>
#include  <ctype.h>
#include  <string.h>
#include  "../tthimage.h"

/*::------------------------------------------------------------------::*/
typedef struct	{
	short		flags;
	uint16_t	bits[24];
	} Char_16x24;

/* go, go, go, have a global var */
/* 14 septembre 2020, make it static */
static Char_16x24	chars_16x24[256];

/*::------------------------------------------------------------------::*/
/*
	il n'y a encore rien dans cette fonction, car je suis en train
	de construire un <EFBFBD>diteur de fonte adapt<EFBFBD> a _mes_ besoins.
	d<EFBFBD>s qu'il commencera a etre utilisable, et surtout d<EFBFBD>s que les
	sp<EFBFBD>cifications du format de fichier seront relativement fig<EFBFBD>es,
	je commencerais <EFBFBD> coder la chose.
*/
/*	15 septembre 2022 : rien n'est fait, c'est un scandale ! */

int	Image_t16x24_binload(char *fontname, uint8_t *zone, int flag)
{

fprintf(stderr, "Don't know how to load '%s' in binary mode\n", fontname);
fprintf(stderr, "  address %p   flags 0x%x\n", zone, flag);

return FUNC_NOT_FINISH;
}
/*::------------------------------------------------------------------::*/
/* WARNING: this function is a work in progress */

int	Image_t16x24_txtload(char *fontname, uint8_t *zone, int flags)
{
FILE		*fp;
int		numchar;
int		foo,  x, y, eol, mask;
char		ligne[20+1];
uint16_t		mot;

fprintf(stderr, ">>> %s ( '%s' %p 0x%x )\n", __func__, fontname, zone, flags);

if ( NULL == (fp=Image_must_fopen(fontname, "r", 0)) ) {
	fprintf(stderr, "can't open %s\n", fontname);
	return FILE_NOT_FOUND;
	}

/* 16 juin 2015 : now we can erase the whole font by
                  setting bit 0 of flags to one */
if (flags & 1) {
	fprintf(stderr, "erasing 16x24 font at %p\n", chars_16x24);
	memset(chars_16x24, 0, sizeof(chars_16x24));
	}

while ( 1 == fscanf(fp, "%d\n", &numchar) ) {
	if ( (numchar<0) || (numchar>255) ) {
		fprintf(stderr, "char %d out of range\n", numchar);
		break;
		}
#if DEBUG_LEVEL > 1
	fprintf(stderr, "-- char %3d    '%c'\n", numchar,
				isprint(numchar) ? numchar : ' ');
#endif

	for (y=0; y<24; y++) {
		/* lecture d'une ligne d'ascii-pixels */
		memset(ligne, '\0', 20);
		if ( NULL==fgets(ligne, 20, fp) )
			{
			fprintf(stderr, "EOF ?\n");
			}
		foo = strlen(ligne);
		eol = ligne[16];
		if (17!=foo || '\n'!=eol)
			{
			fprintf(stderr, "%s: bad line: %3d  %3d  %3d\n",
					__func__, y, foo, eol);
			fprintf(stderr, "   [%s]\n", ligne);
			abort();	/* very hard, no ? XXX */
			}
		mask = 0x8000;
		mot = 0;
		for (x=0; x<16; x++)
			{
			if (ligne[x]=='*' || ligne[x]=='0')
				{
				mot |= mask;
#if DEBUG_LEVEL > 1
				putchar('O');
#endif
				}
/* ahem, ne serait-il pas bon de filtrer un peu plus les
 * caracteres indesirables ? */
#if DEBUG_LEVEL > 1
			else
				putchar(' ');
#endif
			mask >>= 1;
			}
#if DEBUG_LEVEL > 1
		printf("  |   %04x\n", mot);
#endif
		chars_16x24[numchar].bits[y] = mot;
		}
	/* fin de la boucle sur les caracteres dans le fichier */
	}

fclose(fp);

return 0;
}
/*::------------------------------------------------------------------::*/
int Image_t16x24_pltch_exp(Image_Desc *img, int lettre, int xpos, int ypos)
{
int			x, y;
uint16_t		mask;


#if DEBUG_LEVEL > 1
fprintf(stderr, "%s: lettre %3d   '%c'     %4d %4d\n", __func__, lettre,
			isprint(lettre) ? lettre : ' ', xpos, ypos);
#endif

for (x=0; x<16; x++)
	for (y=0; y<24; y++)
		Image_plotRGB(img, x+xpos, y+ypos, 60, 60, 80);

for (y=0; y<24; y++) {
	mask = 0x8000;
	for (x=0; x<16; x++) {
		if (chars_16x24[lettre].bits[y] & mask)	{
#if DEBUG_LEVEL > 2
			putchar('X');
#endif
			Image_plotRGB(img, x+xpos, y+ypos, 200, 200, 250);
			}
#if DEBUG_LEVEL > 2
		else putchar('-');
#endif
		mask >>= 1;
		}
#if DEBUG_LEVEL > 2
	putchar('\n');
#endif
	}

return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
int	Image_t16x24_pltch_1(Image_Desc *img, int lettre, int xpos, int ypos,
					RGBA *pap, RGBA *ink, int flags)
{
int			x, y, rs, gs, bs;
int			rp, gp, bp;
int			x2, y2;
uint16_t		mask;

if (flags) {
	fprintf(stderr, "in %s, useless flags 0x%x is useless\n",
			__func__,		flags);
	} 

#if DEBUG_LEVEL > 1
fprintf(stderr, "%s: ltr %3d  '%c'     %4d %4d\n", __func__, lettre,
			isprint(lettre) ? lettre : ' ', xpos, ypos);
#endif

for (y=0; y<24; y++) {
	mask = 0x8000;
	y2 = y + ypos;
	for (x=0; x<16; x++) {
		x2 = x + xpos;
		Image_getRGB(img, x2, y2, &rs, &gs, &bs);
		if (chars_16x24[lettre].bits[y] & mask) {
#if DEBUG_LEVEL > 1
			putchar('O');
#endif
                        rp = ((rs*(255-ink->a))+(ink->r*ink->a)) / 255;
                        gp = ((gs*(255-ink->a))+(ink->g*ink->a)) / 255;
                        bp = ((bs*(255-ink->a))+(ink->b*ink->a)) / 255;
			}
		else {
#if DEBUG_LEVEL > 1
			putchar('.');
#endif
                        rp = ((rs*(255-pap->a))+(pap->r*pap->a)) / 255;
                        gp = ((gs*(255-pap->a))+(pap->g*pap->a)) / 255;
                        bp = ((bs*(255-pap->a))+(pap->b*pap->a)) / 255;
			}
		Image_plotRGB(img, x2, y2, rp, gp, bp);
		mask >>= 1;
		} /* finbo x */
#if DEBUG_LEVEL > 1
	putchar('\n');
#endif
	} /* finbo y */

return FUNC_IS_ALPHA;/* BETIC ? */
}
/*::------------------------------------------------------------------::*/
int Image_t16x24_pltstr_1(Image_Desc *img, char *str, int x, int y,
                                         RGBA *paper, RGBA *ink, int flags)
{
int	len, foo;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s: '%s' at %d,%d\n", __func__, str, x, y);
#endif

len = strlen(str);

for (foo=0; foo<len; foo++) {
#if DEBUG_LEVEL > 1
	fprintf(stderr, "%4d  %c\n", foo, str[foo]);
#endif
	Image_t16x24_pltch_1(img, str[foo], x+(foo*16), y, paper, ink, flags);
	}

/* XXX return FUNC_IS_BETA; */
return 0;
}
/*::------------------------------------------------------------------::*/
/*::------------------------------------------------------------------::*/
#define T_ZONE  (256*24*2)	/* please explain this magic number */

int	Image_t16x24_essai(char *fontname, char *texte, char *tganame)
{
Image_Desc	*img;
int		foo;
int		ltxt, largeur;

fprintf(stderr, "*** essai fonte 16x24:  %s -> %s\n", fontname, tganame);
fprintf(stderr, "    texte -> '%s'\n", texte);

foo = Image_t16x24_txtload(fontname, NULL, 0);
Image_print_error("fonte 16x24, txtload", foo);

ltxt = strlen(texte);
largeur = 16 * ltxt;

img = Image_alloc(largeur, 24, 3);
if (NULL == img) {
	fprintf(stderr, "no mem in %s\n", __func__);
	abort();
	}
Image_clear(img, 0, 0, 0);

for (foo=0; foo<ltxt; foo++) {
	Image_t16x24_pltch_exp(img, texte[foo], foo*16, 0);
	}

foo = Image_TGA_save(tganame, img, 0);
Image_DeAllocate(img);

return FUNC_NOT_FINISH;
}
/*::------------------------------------------------------------------::*/
#define S_X (34)
#define S_Y (37)
#define W_IMG (8+(16*S_X))
#define H_IMG (10+(16*S_Y))
int	Image_t16x24_chars_map(char *fontname, char *tganame, int flag)
{
Image_Desc	*img;
int		foo, ix, iy, ichar;
int		px, py;
char		chaine[42];
RGBA		paper, ink;

foo = Image_t16x24_txtload(fontname, NULL, 1);
Image_print_error("fonte 16x24, txtload", foo);

img = Image_alloc(W_IMG, H_IMG, 3);
if (NULL == img) {
	fprintf(stderr, "no mem in %s\n", __func__);
	abort();
	}
Image_clear(img, 0, 0, 0);

Image_load_fnt8x8("8x8thin", NULL, 0);

paper.r = paper.g = paper.b = paper.a = 0;
ink.r = ink.g = ink.b = 192; ink.a = 255;

ichar = 0;
for (ix=0; ix<16; ix++)	{
	px = 4 + (ix * S_X);
	for (iy=0; iy<16; iy++)	{
		py = 4 + (iy * S_Y);
		Image_t16x24_pltch_exp(img, ichar, px+4, py);

		if (flag & 1)
			sprintf(chaine, "$%02x", ichar);
		else
			sprintf(chaine, "%3d", ichar);
			
		Image_trace_chaine_1(img, chaine, px, py+25, NULL,
							&paper, &ink);
		ichar ++;
		}
	}

foo = Image_TGA_save(tganame, img, 0);
Image_DeAllocate(img);	free(img);

return 42;
}
/*::------------------------------------------------------------------::*/