#define CONTRAST_MIN	0x60
#define CONTRAST_MAX	0xC0

unsigned char* SCREEN_BASE_ADDR;

void initScreen();

void setPixelRGB(unsigned int x, unsigned int y, int r, int g, int b);
void drawLineHorizRGB(unsigned int y, int x1, int x2, int r, int g, int b, int s);
void drawLineVertRGB(unsigned int x, int y1, int y2, int r, int g, int b, int s);
void drawFullHorizRGB(unsigned int y, int r, int g, int b, int s);
void drawFullVertRGB(unsigned int x, int r, int g, int b, int s);
void drawLineBoxRGB(int x1, int y1, int x2, int y2, int r, int g, int b, int s);
void drawFullBoxRGB(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2, int r, int g, int b);
void drawImgBox(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2, unsigned short int* image, int w, int h);
void putCharRGB(int x, int y, char ch, int r, int g, int b);
void drwStrRGB(int x, int y, char* str, int ret, int r, int g, int b);
unsigned short int* getScreen();