/**** BMP文件头数据结构 ****/
typedef struct {
unsigned char type[2]; //文件类型
unsigned int size; //文件大小
unsigned short reserved1; //保留字段1
unsigned short reserved2; //保留字段2
unsigned int offset; //到位图数据的偏移量
} __attribute__ ((packed)) bmp_file_header;
/**** 位图信息头数据结构 ****/
typedef struct {
unsigned int size; //位图信息头大小
int width; //图像宽度
int height; //图像高度
unsigned short planes; //位面数
unsigned short bpp; //像素深度
unsigned int compression; //压缩方式
unsigned int image_size; //图像大小
int x_pels_per_meter; //像素/米
int y_pels_per_meter; //像素/米
unsigned int clr_used;
unsigned int clr_omportant;
} __attribute__ ((packed)) bmp_info_header;
/**** 静态全局变量 ****/
static int width; //LCD X分辨率
static int height; //LCD Y分辨率
static unsigned short *screen_base = NULL; //映射后的显存基地址
static unsigned long line_length; //LCD一行的长度(字节为单位)
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From: https://www.cnblogs.com/wxp55/p/18187025