71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
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/**
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* @file lv_draw_sw_dither.h
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*
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*/
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#ifndef LV_DRAW_SW_DITHER_H
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#define LV_DRAW_SW_DITHER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*********************
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* INCLUDES
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*********************/
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#include "../../core/lv_obj_pos.h"
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/*********************
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* DEFINES
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*********************/
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#if LV_COLOR_DEPTH < 32 && LV_DITHER_GRADIENT == 1
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#define _DITHER_GRADIENT 1
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#else
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#define _DITHER_GRADIENT 0
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#endif
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/**********************
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* TYPEDEFS
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**********************/
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#if _DITHER_GRADIENT
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/*A signed error color component*/
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typedef struct {
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int8_t r, g, b;
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} lv_scolor24_t;
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struct _lv_gradient_cache_t;
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typedef void (*lv_dither_func_t)(struct _lv_gradient_cache_t * grad, lv_coord_t x, lv_coord_t y, lv_coord_t w);
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#endif
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/**********************
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* PROTOTYPES
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**********************/
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#if LV_DRAW_COMPLEX
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#if _DITHER_GRADIENT
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LV_ATTRIBUTE_FAST_MEM void lv_dither_none(struct _lv_gradient_cache_t * grad, lv_coord_t x, lv_coord_t y, lv_coord_t w);
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LV_ATTRIBUTE_FAST_MEM void lv_dither_ordered_hor(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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LV_ATTRIBUTE_FAST_MEM void lv_dither_ordered_ver(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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#if LV_DITHER_ERROR_DIFFUSION == 1
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LV_ATTRIBUTE_FAST_MEM void lv_dither_err_diff_hor(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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LV_ATTRIBUTE_FAST_MEM void lv_dither_err_diff_ver(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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#endif /* LV_DITHER_ERROR_DIFFUSION */
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#endif /* _DITHER_GRADIENT */
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#endif
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif
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