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/* Copyright 2017 Fred Sundvik
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "lcd_backlight_keyframes.h"
bool lcd_backlight_keyframe_animate_color(keyframe_animation_t* animation, visualizer_state_t* state) {
int frame_length = animation->frame_lengths[animation->current_frame];
int current_pos = frame_length - animation->time_left_in_frame;
uint8_t t_h = LCD_HUE(state->target_lcd_color);
uint8_t t_s = LCD_SAT(state->target_lcd_color);
uint8_t t_i = LCD_INT(state->target_lcd_color);
uint8_t p_h = LCD_HUE(state->prev_lcd_color);
uint8_t p_s = LCD_SAT(state->prev_lcd_color);
uint8_t p_i = LCD_INT(state->prev_lcd_color);
uint8_t d_h1 = t_h - p_h; // Modulo arithmetic since we want to wrap around
int d_h2 = t_h - p_h;
// Chose the shortest way around
int d_h = abs(d_h2) < d_h1 ? d_h2 : d_h1;
int d_s = t_s - p_s;
int d_i = t_i - p_i;
int hue = (d_h * current_pos) / frame_length;
int sat = (d_s * current_pos) / frame_length;
int intensity = (d_i * current_pos) / frame_length;
// dprintf("%X -> %X = %X\n", p_h, t_h, hue);
hue += p_h;
sat += p_s;
intensity += p_i;
state->current_lcd_color = LCD_COLOR(hue, sat, intensity);
lcd_backlight_color(LCD_HUE(state->current_lcd_color), LCD_SAT(state->current_lcd_color), LCD_INT(state->current_lcd_color));
return true;
}
bool lcd_backlight_keyframe_set_color(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
state->prev_lcd_color = state->target_lcd_color;
state->current_lcd_color = state->target_lcd_color;
lcd_backlight_color(LCD_HUE(state->current_lcd_color), LCD_SAT(state->current_lcd_color), LCD_INT(state->current_lcd_color));
return false;
}
bool lcd_backlight_keyframe_disable(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
(void)state;
lcd_backlight_hal_color(0, 0, 0);
return false;
}
bool lcd_backlight_keyframe_enable(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
(void)state;
lcd_backlight_color(LCD_HUE(state->current_lcd_color), LCD_SAT(state->current_lcd_color), LCD_INT(state->current_lcd_color));
return false;
}
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