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_lv_gradient_cache_t struct
To avoid recomputing gradient for each draw operation, it's possible to cache the computation in this structure instance. Whenever possible, this structure is reused instead of recomputing the gradient map
Syntax
typedef struct _lv_gradient_cache_t
{
uint32_t key;
uint32_t life : 30;
uint32_t filled : 1;
uint32_t not_cached: 1;
lv_color_t * map;
lv_coord_t alloc_size;
lv_coord_t size;
#if _DITHER_GRADIENT
lv_color32_t * hmap;
#if LV_DITHER_ERROR_DIFFUSION == 1
lv_scolor24_t * error_acc;
lv_coord_t w;
#endif
#endif
} lv_grad_t;
Fields
Field
Declared as
Description
uint32_t
A discriminating key that's built from the drawing operation. If the key does not match, the cache item is not used.
uint32_t : 30
A life counter that's incremented on usage. Higher counter is less likely to be evicted from the cache.
uint32_t: 1
The cache was too small so this item is not managed by the cache.
The computed gradient low bitdepth color map, points into the cache's buffer, no free needed.