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