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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "mf_scaledfont.h"
#ifndef MF_NO_COMPILE
struct scaled_renderstate
{
mf_pixel_callback_t orig_callback;
void *orig_state;
uint8_t x_scale;
uint8_t y_scale;
int16_t x0;
int16_t y0;
};
static void scaled_pixel_callback(int16_t x, int16_t y, uint8_t count,
uint8_t alpha, void *state)
{
struct scaled_renderstate *rstate = state;
uint8_t dy;
count *= rstate->x_scale;
x = rstate->x0 + x * rstate->x_scale;
y = rstate->y0 + y * rstate->y_scale;
for (dy = 0; dy < rstate->y_scale; dy++)
{
rstate->orig_callback(x, y + dy, count, alpha, rstate->orig_state);
}
}
uint8_t mf_scaled_character_width(const struct mf_font_s *font,
uint16_t character)
{
struct mf_scaledfont_s *sfont = (struct mf_scaledfont_s*)font;
uint8_t basewidth;
basewidth = sfont->basefont->character_width(sfont->basefont, character);
return sfont->x_scale * basewidth;
}
uint8_t mf_scaled_render_character(const struct mf_font_s *font,
int16_t x0, int16_t y0,
uint16_t character,
mf_pixel_callback_t callback,
void *state)
{
struct mf_scaledfont_s *sfont = (struct mf_scaledfont_s*)font;
struct scaled_renderstate rstate;
uint8_t basewidth;
rstate.orig_callback = callback;
rstate.orig_state = state;
rstate.x_scale = sfont->x_scale;
rstate.y_scale = sfont->y_scale;
rstate.x0 = x0;
rstate.y0 = y0;
basewidth = sfont->basefont->render_character(sfont->basefont, 0, 0,
character, scaled_pixel_callback, &rstate);
return sfont->x_scale * basewidth;
}
void mf_scale_font(struct mf_scaledfont_s *newfont,
const struct mf_font_s *basefont,
uint8_t x_scale, uint8_t y_scale)
{
newfont->font = *basefont;
newfont->basefont = basefont;
newfont->font.width *= x_scale;
newfont->font.height *= y_scale;
newfont->font.baseline_x *= x_scale;
newfont->font.baseline_y *= y_scale;
newfont->font.min_x_advance *= x_scale;
newfont->font.max_x_advance *= x_scale;
newfont->font.line_height *= y_scale;
newfont->font.character_width = &mf_scaled_character_width;
newfont->font.render_character = &mf_scaled_render_character;
newfont->x_scale = x_scale;
newfont->y_scale = y_scale;
}
#endif //MF_NO_COMPILE
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