C语言 将RGB888转换为RGB565
参考链接
致谢：开袋有惊喜

#define RGB888_RED      0x00ff0000
#define RGB888_GREEN    0x0000ff00
#define RGB888_BLUE     0x000000ff
 
#define RGB565_RED      0xf800
#define RGB565_GREEN    0x07e0
#define RGB565_BLUE     0x001f
 
unsigned short RGB888ToRGB565(unsigned int n888Color)
{
    unsigned short n565Color = 0;
 
    // 获取RGB单色，并截取高位
    unsigned char cRed   = (n888Color & RGB888_RED)   >> 19;
    unsigned char cGreen = (n888Color & RGB888_GREEN) >> 10;
    unsigned char cBlue  = (n888Color & RGB888_BLUE)  >> 3;
 
    // 连接
    n565Color = (cRed << 11) + (cGreen << 5) + (cBlue << 0);
    return n565Color;
}
 
unsigned int RGB565ToRGB888(unsigned short n565Color)
{
    unsigned int n888Color = 0;
 
    // 获取RGB单色，并填充低位
    unsigned char cRed   = (n565Color & RGB565_RED)    >> 8;
    unsigned char cGreen = (n565Color & RGB565_GREEN)  >> 3;
    unsigned char cBlue  = (n565Color & RGB565_BLUE)   << 3;
 
    // 连接
    n888Color = (cRed << 16) + (cGreen << 8) + (cBlue << 0);
    return n888Color;
}