1 /**
2 * @file lv_draw_vg_lite_box_shadow.c
3 *
4 */
5
6 /*********************
7 * INCLUDES
8 *********************/
9
10 #include "../../misc/lv_area_private.h"
11 #include "lv_draw_vg_lite.h"
12
13 #if LV_USE_DRAW_VG_LITE
14
15 #include "lv_draw_vg_lite_type.h"
16
17 /*********************
18 * DEFINES
19 *********************/
20
21 /**********************
22 * TYPEDEFS
23 **********************/
24
25 /**********************
26 * STATIC PROTOTYPES
27 **********************/
28
29 /**********************
30 * STATIC VARIABLES
31 **********************/
32
33 /**********************
34 * MACROS
35 **********************/
36
37 /**********************
38 * GLOBAL FUNCTIONS
39 **********************/
40
lv_draw_vg_lite_box_shadow(lv_draw_unit_t * draw_unit,const lv_draw_box_shadow_dsc_t * dsc,const lv_area_t * coords)41 void lv_draw_vg_lite_box_shadow(lv_draw_unit_t * draw_unit, const lv_draw_box_shadow_dsc_t * dsc,
42 const lv_area_t * coords)
43 {
44 /*Calculate the rectangle which is blurred to get the shadow in `shadow_area`*/
45 lv_area_t core_area;
46 core_area.x1 = coords->x1 + dsc->ofs_x - dsc->spread;
47 core_area.x2 = coords->x2 + dsc->ofs_x + dsc->spread;
48 core_area.y1 = coords->y1 + dsc->ofs_y - dsc->spread;
49 core_area.y2 = coords->y2 + dsc->ofs_y + dsc->spread;
50
51 /*Calculate the bounding box of the shadow*/
52 lv_area_t shadow_area;
53 shadow_area.x1 = core_area.x1 - dsc->width / 2 - 1;
54 shadow_area.x2 = core_area.x2 + dsc->width / 2 + 1;
55 shadow_area.y1 = core_area.y1 - dsc->width / 2 - 1;
56 shadow_area.y2 = core_area.y2 + dsc->width / 2 + 1;
57
58 /*Get clipped draw area which is the real draw area.
59 *It is always the same or inside `shadow_area`*/
60 lv_area_t draw_area;
61 if(!lv_area_intersect(&draw_area, &shadow_area, draw_unit->clip_area)) return;
62
63 LV_PROFILER_DRAW_BEGIN;
64
65 lv_draw_border_dsc_t border_dsc;
66 lv_draw_border_dsc_init(&border_dsc);
67 border_dsc.width = 3;
68 border_dsc.color = dsc->color;
69 border_dsc.radius = dsc->radius;
70
71 lv_area_move(&draw_area, dsc->ofs_x, dsc->ofs_y);
72 draw_area = core_area;
73 int32_t half_w = dsc->width / 2;
74
75 for(int32_t w = 0; w < half_w; w++) {
76 border_dsc.opa = lv_map(w, 0, half_w, dsc->opa / 4, LV_OPA_0);
77 border_dsc.radius++;
78 lv_area_increase(&draw_area, 1, 1);
79 lv_draw_vg_lite_border(draw_unit, &border_dsc, &draw_area);
80
81 /* fill center */
82 if(dsc->ofs_x || dsc->ofs_y) {
83 lv_draw_fill_dsc_t fill_dsc;
84 lv_draw_fill_dsc_init(&fill_dsc);
85 fill_dsc.radius = dsc->radius;
86 fill_dsc.opa = dsc->opa;
87 fill_dsc.color = dsc->color;
88 lv_draw_vg_lite_fill(draw_unit, &fill_dsc, &core_area);
89 }
90 }
91 LV_PROFILER_DRAW_END;
92 }
93
94 /**********************
95 * STATIC FUNCTIONS
96 **********************/
97
98 #endif /*LV_USE_DRAW_VG_LITE*/
99
