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#include "mf_font.h"
#include <stdbool.h>
/* This will be made into a list of included fonts using macro magic. */
#define MF_INCLUDED_FONTS 0
/* Included fonts begin here */
#include MF_FONT_FILE_NAME
/* Include fonts end here */
uint8_t mf_render_character(const struct mf_font_s *font,
int16_t x0, int16_t y0,
mf_char character,
mf_pixel_callback_t callback,
void *state)
{
uint8_t width;
width = font->render_character(font, x0, y0, character, callback, state);
if (!width)
{
width = font->render_character(font, x0, y0, font->fallback_character,
callback, state);
}
return width;
}
uint8_t mf_character_width(const struct mf_font_s *font,
mf_char character)
{
uint8_t width;
width = font->character_width(font, character);
if (!width)
{
width = font->character_width(font, font->fallback_character);
}
return width;
}
struct whitespace_state
{
uint8_t min_x, min_y;
uint8_t max_x, max_y;
};
static void whitespace_callback(int16_t x, int16_t y, uint8_t count,
uint8_t alpha, void *state)
{
struct whitespace_state *s = state;
if (alpha > 7)
{
if (s->min_x > x) s->min_x = x;
if (s->min_y > y) s->min_y = y;
x += count - 1;
if (s->max_x < x) s->max_x = x;
if (s->max_y < y) s->max_y = y;
}
}
MF_EXTERN void mf_character_whitespace(const struct mf_font_s *font,
mf_char character,
uint8_t *left, uint8_t *top,
uint8_t *right, uint8_t *bottom)
{
struct whitespace_state state = {255, 255, 0, 0};
mf_render_character(font, 0, 0, character, whitespace_callback, &state);
if (state.min_x == 255 && state.min_y == 255)
{
/* Character is whitespace */
if (left) *left = font->width;
if (top) *top = font->height;
if (right) *right = 0;
if (bottom) *bottom = 0;
}
else
{
if (left) *left = state.min_x;
if (top) *top = state.min_y;
if (right) *right = font->width - state.max_x - 1;
if (bottom) *bottom = font->height - state.max_y - 1;
}
}
/* Avoids a dependency on libc */
static bool strequals(const char *a, const char *b)
{
while (*a)
{
if (*a++ != *b++)
return false;
}
return (!*b);
}
const struct mf_font_s *mf_find_font(const char *name)
{
const struct mf_font_list_s *f;
f = MF_INCLUDED_FONTS;
while (f)
{
if (strequals(f->font->full_name, name) ||
strequals(f->font->short_name, name))
{
return f->font;
}
f = f->next;
}
return 0;
}
const struct mf_font_list_s *mf_get_font_list()
{
return MF_INCLUDED_FONTS;
}
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