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Add led crossfading

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This commit is contained in:
Fred Sundvik 2016-04-24 16:20:00 +03:00
parent 891edbd533
commit 0530ebb77d
2 changed files with 64 additions and 6 deletions
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68
led_test.c
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@ -26,27 +26,41 @@ SOFTWARE.
#include "math.h"
keyframe_animation_t led_test_animation = {
.num_frames = 4,
.num_frames = 8,
.loop = true,
.frame_lengths = {
MS2ST(1000),
MS2ST(1000),
MS2ST(1000),
MS2ST(3000)},
MS2ST(1000), // fade in
MS2ST(1000), // no op (leds on)
MS2ST(1000), // fade out
MS2ST(1000), // crossfade
MS2ST(3000), // left to rigt
MS2ST(1000), // crossfade
MS2ST(3000), // top_to_bottom
MS2ST(1000), // crossfade
},
.frame_functions = {
keyframe_fade_in_all_leds,
keyframe_no_operation,
keyframe_fade_out_all_leds,
keyframe_led_crossfade,
keyframe_led_left_to_right_gradient,
keyframe_led_crossfade,
keyframe_led_top_to_bottom_gradient,
keyframe_led_crossfade
},
};
static void keyframe_fade_all_leds_from_to(keyframe_animation_t* animation, uint8_t from, uint8_t to) {
static uint8_t fade_led_color(keyframe_animation_t* animation, uint8_t from, uint8_t to) {
int frame_length = animation->frame_lengths[animation->current_frame];
int current_pos = frame_length - animation->time_left_in_frame;
int delta = to - from;
int luma = (delta * current_pos) / frame_length;
luma += from;
return luma;
}
static void keyframe_fade_all_leds_from_to(keyframe_animation_t* animation, uint8_t from, uint8_t to) {
uint8_t luma = fade_led_color(animation, from, to);
color_t color = LUMA2COLOR(luma);
gdispGClear(LED_DISPLAY, color);
gdispGFlush(LED_DISPLAY);
@ -56,6 +70,9 @@ static void keyframe_fade_all_leds_from_to(keyframe_animation_t* animation, uint
#define NUM_ROWS 7
#define NUM_COLS 7
static uint8_t crossfade_start_frame[NUM_ROWS][NUM_COLS];
static uint8_t crossfade_end_frame[NUM_ROWS][NUM_COLS];
static uint8_t compute_gradient_color(float t, float index, float num) {
float d = fabs(index - t);
if (d > num / 2.0f) {
@ -85,5 +102,44 @@ bool keyframe_led_left_to_right_gradient(keyframe_animation_t* animation, visual
uint8_t color = compute_gradient_color(t, i, NUM_COLS);
gdispGDrawLine(LED_DISPLAY, i, 0, i, NUM_ROWS - 1, LUMA2COLOR(color));
}
gdispGFlush(LED_DISPLAY);
return true;
}
bool keyframe_led_top_to_bottom_gradient(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)state;
int frame_length = animation->frame_lengths[animation->current_frame];
int current_pos = frame_length - animation->time_left_in_frame;
float t = current_pos / frame_length;
for (int i=0; i< NUM_ROWS; i++) {
uint8_t color = compute_gradient_color(t, i, NUM_ROWS);
gdispGDrawLine(LED_DISPLAY, 0, i, NUM_COLS - 1, i, LUMA2COLOR(color));
}
gdispGFlush(LED_DISPLAY);
return true;
}
static void copy_current_led_state(uint8_t* dest) {
for (int i=0;i<NUM_ROWS;i++) {
for (int j=0;j<NUM_COLS;j++) {
dest[i*NUM_COLS + j] = gdispGGetPixelColor(LED_DISPLAY, j, i);
}
}
}
bool keyframe_led_crossfade(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)state;
if (animation->first_update_of_frame) {
copy_current_led_state(&crossfade_start_frame[0][0]);
run_next_keyframe(animation, state);
copy_current_led_state(&crossfade_end_frame[0][0]);
}
for (int i=0;i<NUM_ROWS;i++) {
for (int j=0;j<NUM_COLS;j++) {
color_t color = LUMA2COLOR(fade_led_color(animation, crossfade_start_frame[i][j], crossfade_end_frame[i][j]));
gdispGDrawPixel(LED_DISPLAY, j, i, color);
}
}
gdispGFlush(LED_DISPLAY);
return true;
}

2
led_test.h
View file

@ -30,6 +30,8 @@ SOFTWARE.
bool keyframe_fade_in_all_leds(keyframe_animation_t* animation, visualizer_state_t* state);
bool keyframe_fade_out_all_leds(keyframe_animation_t* animation, visualizer_state_t* state);
bool keyframe_led_left_to_right_gradient(keyframe_animation_t* animation, visualizer_state_t* state);
bool keyframe_led_top_to_bottom_gradient(keyframe_animation_t* animation, visualizer_state_t* state);
bool keyframe_led_crossfade(keyframe_animation_t* animation, visualizer_state_t* state);
extern keyframe_animation_t led_test_animation;