/**
  * @file lv_rlottie.c
  *
  */
 
 /*********************
  *      INCLUDES
  *********************/
 #include "lv_rlottie.h"
 #if LV_USE_RLOTTIE
 
 #include <rlottie_capi.h>
 
 /*********************
 *      DEFINES
 *********************/
 #define MY_CLASS &lv_rlottie_class
 #define LV_ARGB32   32
 
 /**********************
 *      TYPEDEFS
 **********************/
 #define LV_ARGB32   32
 
 /**********************
  *  STATIC PROTOTYPES
  **********************/
 static void lv_rlottie_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
 static void lv_rlottie_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
 static void next_frame_task_cb(lv_timer_t * t);
 
 /**********************
  *  STATIC VARIABLES
  **********************/
 const lv_obj_class_t lv_rlottie_class = {
     .constructor_cb = lv_rlottie_constructor,
     .destructor_cb = lv_rlottie_destructor,
     .instance_size = sizeof(lv_rlottie_t),
     .base_class = &lv_img_class
 };
 
 static lv_coord_t create_width;
 static lv_coord_t create_height;
 static const char * rlottie_desc_create;
 static const char * path_create;
 
 /**********************
  *      MACROS
  **********************/
 
 /**********************
  *   GLOBAL FUNCTIONS
  **********************/
 
 lv_obj_t * lv_rlottie_create_from_file(lv_obj_t * parent, lv_coord_t width, lv_coord_t height, const char * path)
 {
 
     create_width = width;
     create_height = height;
     path_create = path;
     rlottie_desc_create = NULL;
 
     LV_LOG_INFO("begin");
     lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
     lv_obj_class_init_obj(obj);
 
     return obj;
 
 }
 
 lv_obj_t * lv_rlottie_create_from_raw(lv_obj_t * parent, lv_coord_t width, lv_coord_t height, const char * rlottie_desc)
 {
 
     create_width = width;
     create_height = height;
     rlottie_desc_create = rlottie_desc;
     path_create = NULL;
 
     LV_LOG_INFO("begin");
     lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
     lv_obj_class_init_obj(obj);
 
     return obj;
 }
 
 void lv_rlottie_set_play_mode(lv_obj_t * obj, const lv_rlottie_ctrl_t ctrl)
 {
     lv_rlottie_t * rlottie = (lv_rlottie_t *) obj;
     rlottie->play_ctrl = ctrl;
 
     if(rlottie->task && (rlottie->dest_frame != rlottie->current_frame ||
                          (rlottie->play_ctrl & LV_RLOTTIE_CTRL_PAUSE) == LV_RLOTTIE_CTRL_PLAY)) {
         lv_timer_resume(rlottie->task);
     }
 }
 
 void lv_rlottie_set_current_frame(lv_obj_t * obj, const size_t goto_frame)
 {
     lv_rlottie_t * rlottie = (lv_rlottie_t *) obj;
     rlottie->current_frame = goto_frame < rlottie->total_frames ? goto_frame : rlottie->total_frames - 1;
 }
 
 /**********************
  *   STATIC FUNCTIONS
  **********************/
 
 static void lv_rlottie_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
 {
     LV_UNUSED(class_p);
     lv_rlottie_t * rlottie = (lv_rlottie_t *) obj;
 
     if(rlottie_desc_create) {
         rlottie->animation = lottie_animation_from_data(rlottie_desc_create, rlottie_desc_create, "");
     }
     else if(path_create) {
         rlottie->animation = lottie_animation_from_file(path_create);
     }
     if(rlottie->animation == NULL) {
         LV_LOG_WARN("The aniamtion can't be opened");
         return;
     }
 
     rlottie->total_frames = lottie_animation_get_totalframe(rlottie->animation);
     rlottie->framerate = (size_t)lottie_animation_get_framerate(rlottie->animation);
     rlottie->current_frame = 0;
 
     rlottie->scanline_width = create_width * LV_ARGB32 / 8;
 
     size_t allocaled_buf_size = (create_width * create_height * LV_ARGB32 / 8);
     rlottie->allocated_buf = lv_mem_alloc(allocaled_buf_size);
     if(rlottie->allocated_buf != NULL) {
         rlottie->allocated_buffer_size = allocaled_buf_size;
         memset(rlottie->allocated_buf, 0, allocaled_buf_size);
     }
 
     rlottie->imgdsc.header.always_zero = 0;
     rlottie->imgdsc.header.cf = LV_IMG_CF_TRUE_COLOR_ALPHA;
     rlottie->imgdsc.header.h = create_height;
     rlottie->imgdsc.header.w = create_width;
     rlottie->imgdsc.data = (void *)rlottie->allocated_buf;
     rlottie->imgdsc.data_size = allocaled_buf_size;
 
     lv_img_set_src(obj, &rlottie->imgdsc);
 
     rlottie->play_ctrl = LV_RLOTTIE_CTRL_FORWARD | LV_RLOTTIE_CTRL_PLAY | LV_RLOTTIE_CTRL_LOOP;
     rlottie->dest_frame = rlottie->total_frames; /* invalid destination frame so it's possible to pause on frame 0 */
 
     rlottie->task = lv_timer_create(next_frame_task_cb, 1000 / rlottie->framerate, obj);
 
     lv_obj_update_layout(obj);
 }
 
 
 static void lv_rlottie_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
 {
     LV_UNUSED(class_p);
     lv_rlottie_t * rlottie = (lv_rlottie_t *) obj;
 
     if(rlottie->animation) {
         lottie_animation_destroy(rlottie->animation);
         rlottie->animation = 0;
         rlottie->current_frame = 0;
         rlottie->framerate = 0;
         rlottie->scanline_width = 0;
         rlottie->total_frames = 0;
     }
 
     if(rlottie->task) {
         lv_timer_del(rlottie->task);
         rlottie->task = NULL;
         rlottie->play_ctrl = LV_RLOTTIE_CTRL_FORWARD;
         rlottie->dest_frame = 0;
     }
 
     lv_img_cache_invalidate_src(&rlottie->imgdsc);
     if(rlottie->allocated_buf) {
         lv_mem_free(rlottie->allocated_buf);
         rlottie->allocated_buf = NULL;
         rlottie->allocated_buffer_size = 0;
     }
 
 }
 
 #if LV_COLOR_DEPTH == 16
 static void convert_to_rgba5658(uint32_t * pix, const size_t width, const size_t height)
 {
     /* rlottie draws in ARGB32 format, but LVGL only deal with RGB565 format with (optional 8 bit alpha channel)
        so convert in place here the received buffer to LVGL format. */
     uint8_t * dest = (uint8_t *)pix;
     uint32_t * src = pix;
     for(size_t y = 0; y < height; y++) {
         /* Convert a 4 bytes per pixel in format ARGB to R5G6B5A8 format
             naive way:
                         r = ((c & 0xFF0000) >> 19)
                         g = ((c & 0xFF00) >> 10)
                         b = ((c & 0xFF) >> 3)
                         rgb565 = (r << 11) | (g << 5) | b
                         a = c >> 24;
             That's 3 mask, 6 bitshift and 2 or operations
 
             A bit better:
                         r = ((c & 0xF80000) >> 8)
                         g = ((c & 0xFC00) >> 5)
                         b = ((c & 0xFF) >> 3)
                         rgb565 = r | g | b
                         a = c >> 24;
             That's 3 mask, 3 bitshifts and 2 or operations */
         for(size_t x = 0; x < width; x++) {
             uint32_t in = src[x];
 #if LV_COLOR_16_SWAP == 0
             uint16_t r = (uint16_t)(((in & 0xF80000) >> 8) | ((in & 0xFC00) >> 5) | ((in & 0xFF) >> 3));
 #else
             /* We want: rrrr rrrr GGGg gggg bbbb bbbb => gggb bbbb rrrr rGGG */
             uint16_t r = (uint16_t)(((in & 0xF80000) >> 16) | ((in & 0xFC00) >> 13) | ((in & 0x1C00) << 3) | ((in & 0xF8) << 5));
 #endif
 
             lv_memcpy(dest, &r, sizeof(r));
             dest[sizeof(r)] = (uint8_t)(in >> 24);
             dest += LV_IMG_PX_SIZE_ALPHA_BYTE;
         }
         src += width;
     }
 }
 #endif
 
 static void next_frame_task_cb(lv_timer_t * t)
 {
     lv_obj_t * obj = t->user_data;
     lv_rlottie_t * rlottie = (lv_rlottie_t *) obj;
 
     if((rlottie->play_ctrl & LV_RLOTTIE_CTRL_PAUSE) == LV_RLOTTIE_CTRL_PAUSE) {
         if(rlottie->current_frame == rlottie->dest_frame) {
             /* Pause the timer too when it has run once to avoid CPU consumption */
             lv_timer_pause(t);
             return;
         }
         rlottie->dest_frame = rlottie->current_frame;
     }
     else {
         if((rlottie->play_ctrl & LV_RLOTTIE_CTRL_BACKWARD) == LV_RLOTTIE_CTRL_BACKWARD) {
             if(rlottie->current_frame > 0)
                 --rlottie->current_frame;
             else { /* Looping ? */
                 if((rlottie->play_ctrl & LV_RLOTTIE_CTRL_LOOP) == LV_RLOTTIE_CTRL_LOOP)
                     rlottie->current_frame = rlottie->total_frames - 1;
                 else {
                     lv_event_send(obj, LV_EVENT_READY, NULL);
                     lv_timer_pause(t);
                     return;
                 }
             }
         }
         else {
             if(rlottie->current_frame < rlottie->total_frames)
                 ++rlottie->current_frame;
             else { /* Looping ? */
                 if((rlottie->play_ctrl & LV_RLOTTIE_CTRL_LOOP) == LV_RLOTTIE_CTRL_LOOP)
                     rlottie->current_frame = 0;
                 else {
                     lv_event_send(obj, LV_EVENT_READY, NULL);
                     lv_timer_pause(t);
                     return;
                 }
             }
         }
     }
 
     lottie_animation_render(
         rlottie->animation,
         rlottie->current_frame,
         rlottie->allocated_buf,
         rlottie->imgdsc.header.w,
         rlottie->imgdsc.header.h,
         rlottie->scanline_width
     );
 
 #if LV_COLOR_DEPTH == 16
     convert_to_rgba5658(rlottie->allocated_buf, rlottie->imgdsc.header.w, rlottie->imgdsc.header.h);
 #endif
 
     lv_obj_invalidate(obj);
 }
 
 #endif /*LV_USE_RLOTTIE*/

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