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