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include/liblvgl/draw/sw/lv_draw_sw_dither.h

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