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/**
* @file lv_draw_sw_gradient.h
*
*/
#ifndef LV_DRAW_SW_GRADIENT_H
#define LV_DRAW_SW_GRADIENT_H
#ifdef __cplusplus
extern "C" {
#endif
/*********************
* INCLUDES
*********************/
#include "../../misc/lv_color.h"
#include "../../misc/lv_style.h"
#if LV_USE_DRAW_SW
/*********************
* DEFINES
*********************/
#if LV_GRADIENT_MAX_STOPS < 2
#error LVGL needs at least 2 stops for gradients. Please increase the LV_GRADIENT_MAX_STOPS
#endif
/**********************
* TYPEDEFS
**********************/
typedef lv_color_t lv_grad_color_t;
typedef struct _lv_gradient_cache_t {
lv_color_t * color_map;
lv_opa_t * opa_map;
uint32_t size;
} lv_grad_t;
/**********************
* PROTOTYPES
**********************/
/** Compute the color in the given gradient and fraction
* Gradient are specified in a virtual [0-255] range, so this function scales the virtual range to the given range
* @param dsc The gradient descriptor to use
* @param range The range to use in computation.
* @param frac The current part used in the range. frac is in [0; range]
*/
void /* LV_ATTRIBUTE_FAST_MEM */ lv_gradient_color_calculate(const lv_grad_dsc_t * dsc, int32_t range,
int32_t frac, lv_grad_color_t * color_out, lv_opa_t * opa_out);
/** Get a gradient cache from the given parameters */
lv_grad_t * lv_gradient_get(const lv_grad_dsc_t * gradient, int32_t w, int32_t h);
/**
* Clean up the gradient item after it was get with `lv_grad_get_from_cache`.
* @param grad pointer to a gradient
*/
void lv_gradient_cleanup(lv_grad_t * grad);
#endif /*LV_USE_DRAW_SW*/
#ifdef __cplusplus
} /*extern "C"*/
#endif
#endif /*LV_DRAW_GRADIENT_H*/
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