netsurf/atari/plot/fontplot.c

/*
 * Copyright 2010 Ole Loots <ole@monochrom.net>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * NetSurf is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdbool.h>
#include <assert.h>
#include <stdlib.h>
#include <mt_gem.h>

#include "desktop/mouse.h"
#include "desktop/plot_style.h"

#include "atari/bitmap.h"
#include "atari/plot/fontplot.h"

const struct s_font_driver_table_entry font_driver_table[] =
{
#ifdef WITH_VDI_FONT_DRIVER
	{"vdi", ctor_font_plotter_vdi, 0},
#endif
#ifdef WITH_FREETYPE_FONT_DRIVER
	{"freetype", ctor_font_plotter_freetype, 0},
#endif
#ifdef WITH_INTERNAL_FONT_DRIVER
	{"internal", ctor_font_plotter_internal, 0},
#endif
	{(char*)NULL, NULL, 0}
};

void dump_font_drivers(void)
{
	int i = 0;
	while( font_driver_table[i].name != NULL ) {
		printf("%s -> flags: %d\n", font_driver_table[i].name,
				font_driver_table[i].flags);
		i++;
	}
}


/**
 * Create an new text plotter object.
 *
 * Available: "vdi", "freetype", "internal"
 *
 * \param vdihandle the vdi handle to act upon,
 * \param name selector ID (string) of the font plotter.
 * \param flags configration flags of the plotter, available flags:
 *	             FONTPLOT_FLAG_MONOGLYPH - Enable 1 bit font plotting
 * \param error set to != 0 when errors occur
 * \return the new font plotter instance on success, or NULL on failure.
 */
FONT_PLOTTER new_font_plotter(int vdihandle, char * name, unsigned long flags,
		int * error)
{
	int i=0;
	int res = 0-ERR_PLOTTER_NOT_AVAILABLE;
	FONT_PLOTTER fplotter = NULL;

	/* set the default error code: */
	*error = 0-ERR_PLOTTER_NOT_AVAILABLE;


	/* Find the selector string in the font plotter table,  */
	/* and bail out when the font plotter is not available: */
	for (i = 0; font_driver_table[i].name != NULL; i++) {

		/* found selector in driver table? */
		if (strcmp(name, font_driver_table[i].name) == 0) {

			/* allocate the font plotter instance: */
			fplotter = (FONT_PLOTTER)malloc(sizeof(struct s_font_plotter));
			if (fplotter == NULL) {
				*error = 0-ERR_NO_MEM;
				return(NULL);
			}

			/* Initialize the font plotter with the requested settings: */
			memset( fplotter, 0, sizeof(FONT_PLOTTER));
			fplotter->vdi_handle = vdihandle;
			fplotter->name = name;
			fplotter->flags = 0;
			fplotter->flags |= flags;

			/* Execute the constructor: */
			assert(font_driver_table[i].ctor);
			res = font_driver_table[i].ctor(fplotter);

			/* success? */
			if (res < 0) {
				/* NO success! */
				free(fplotter);
				*error = res;
				return(NULL);
			}
			*error = 0;
			break;
		}
	}

	return(fplotter);
}

/*
	Free an font plotter
*/
int delete_font_plotter(FONT_PLOTTER p)
{
	if (p) {
		p->dtor(p);
		free(p);
		p = NULL;
	}
	else
		return(-1);
	return(0);
}