1 #include "../../lv_examples.h"
2 #if LV_USE_CANVAS&& LV_BUILD_EXAMPLES
3 
4 #define CANVAS_WIDTH  50
5 #define CANVAS_HEIGHT  50
6 
7 /**
8  * Draw a line to the canvas
9  */
lv_example_canvas_7(void)10 void lv_example_canvas_7(void)
11 {
12     /*Create a buffer for the canvas*/
13     LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
14     LV_DRAW_BUF_INIT_STATIC(draw_buf);
15 
16     /*Create a canvas and initialize its palette*/
17     lv_obj_t * canvas = lv_canvas_create(lv_screen_active());
18     lv_canvas_set_draw_buf(canvas, &draw_buf);
19     lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
20     lv_obj_center(canvas);
21 
22     lv_layer_t layer;
23     lv_canvas_init_layer(canvas, &layer);
24 
25     lv_draw_line_dsc_t dsc;
26     lv_draw_line_dsc_init(&dsc);
27     dsc.color = lv_palette_main(LV_PALETTE_RED);
28     dsc.width = 4;
29     dsc.round_end = 1;
30     dsc.round_start = 1;
31     dsc.p1.x = 15;
32     dsc.p1.y = 15;
33     dsc.p2.x = 35;
34     dsc.p2.y = 10;
35     lv_draw_line(&layer, &dsc);
36 
37     lv_canvas_finish_layer(canvas, &layer);
38 
39 }
40 #endif
41