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lvgl 显示图片示例
2022-07-05 14:57:00 【Neo Wordsworth】
通过 在线图像转换工具 获得一个图片文件,这里提取出数据便于了解图片的显示(这个数据可以通过网络或蓝牙传输过来)
uint8_t myimg_map[] = {
0x00, 0x00, 0xff, 0xff,
0x00, 0x00, 0x00, 0x00,
0xfe, 0x7f,
0xfd, 0xbf,
0xc0, 0x03,
0xd7, 0xdb,
0xcf, 0xeb,
0xdf, 0xf3,
0x9e, 0x79,
0x5d, 0xba,
0x5d, 0xba,
0x9e, 0x79,
0xdf, 0xfb,
0xcf, 0xe3,
0xd7, 0xdb,
0xc0, 0x03,
0xfd, 0xbf,
0xfe, 0x7f,
};
void test1(){
static lv_img_dsc_t myimg;
myimg.header.cf = LV_IMG_CF_INDEXED_1BIT;
myimg.header.always_zero = 0;
myimg.header.reserved = 0;
myimg.header.w = 16;
myimg.header.h = 16;
myimg.data_size = 40;
myimg.data = myimg_map;
lv_obj_t * icon = lv_img_create(lv_scr_act());
lv_obj_center(icon);
lv_img_set_src(icon, &myimg);
//#define LV_MY_RECOLOR 1 //注释这里则显示原来的红色
#if LV_MY_RECOLOR
static lv_style_t img_style;
lv_style_init(&img_style);
lv_style_set_img_recolor(&img_style,lv_color_hex(0x0000ff));
lv_style_set_img_recolor_opa(&img_style,255);
lv_obj_add_style(icon, &img_style, 0);
#endif
}
运行后显示这样一张小图
如果使能定义LV_MY_RECOLOR
可以重新着色,原本的红色,重新着色为蓝色
(LV_IMG_CF_INDEXED_1BIT数据前3比特代表颜色是:蓝、绿、红)
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