quantum/visualizer/lcd_backlight_keyframes.c

   1 /* Copyright 2017 Fred Sundvik
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include "lcd_backlight_keyframes.h"
  18
  19 bool lcd_backlight_keyframe_animate_color(keyframe_animation_t* animation, visualizer_state_t* state) {
  20     int frame_length = animation->frame_lengths[animation->current_frame];
  21     int current_pos = frame_length - animation->time_left_in_frame;
  22     uint8_t t_h = LCD_HUE(state->target_lcd_color);
  23     uint8_t t_s = LCD_SAT(state->target_lcd_color);
  24     uint8_t t_i = LCD_INT(state->target_lcd_color);
  25     uint8_t p_h = LCD_HUE(state->prev_lcd_color);
  26     uint8_t p_s = LCD_SAT(state->prev_lcd_color);
  27     uint8_t p_i = LCD_INT(state->prev_lcd_color);
  28
  29     uint8_t d_h1 = t_h - p_h; //Modulo arithmetic since we want to wrap around
  30     int d_h2 = t_h - p_h;
  31     // Chose the shortest way around
  32     int d_h = abs(d_h2) < d_h1 ? d_h2 : d_h1;
  33     int d_s = t_s - p_s;
  34     int d_i = t_i - p_i;
  35
  36     int hue = (d_h * current_pos) / frame_length;
  37     int sat = (d_s * current_pos) / frame_length;
  38     int intensity = (d_i * current_pos) / frame_length;
  39     //dprintf("%X -> %X = %X\n", p_h, t_h, hue);
  40     hue += p_h;
  41     sat += p_s;
  42     intensity += p_i;
  43     state->current_lcd_color = LCD_COLOR(hue, sat, intensity);
  44     lcd_backlight_color(
  45             LCD_HUE(state->current_lcd_color),
  46             LCD_SAT(state->current_lcd_color),
  47             LCD_INT(state->current_lcd_color));
  48
  49     return true;
  50 }
  51
  52 bool lcd_backlight_keyframe_set_color(keyframe_animation_t* animation, visualizer_state_t* state) {
  53     (void)animation;
  54     state->prev_lcd_color = state->target_lcd_color;
  55     state->current_lcd_color = state->target_lcd_color;
  56     lcd_backlight_color(
  57             LCD_HUE(state->current_lcd_color),
  58             LCD_SAT(state->current_lcd_color),
  59             LCD_INT(state->current_lcd_color));
  60     return false;
  61 }
  62
  63 bool lcd_backlight_keyframe_disable(keyframe_animation_t* animation, visualizer_state_t* state) {
  64     (void)animation;
  65     (void)state;
  66     lcd_backlight_hal_color(0, 0, 0);
  67     return false;
  68 }
  69
  70 bool lcd_backlight_keyframe_enable(keyframe_animation_t* animation, visualizer_state_t* state) {
  71     (void)animation;
  72     (void)state;
  73     lcd_backlight_color(LCD_HUE(state->current_lcd_color),
  74         LCD_SAT(state->current_lcd_color),
  75         LCD_INT(state->current_lcd_color));
  76     return false;
  77 }