OneOSARM/fb.h at main · OneDevelopmentPL/OneOSARM · GitHub

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/* OneOS-ARM Framebuffer Driver */

#ifndef FB_H
#define FB_H

typedef struct {
    unsigned int width;
    unsigned int height;
    unsigned int pitch;
    unsigned int bpp;      /* Bits per pixel */
    unsigned char *buffer;
} framebuffer_t;

/* Initialize framebuffer */
void fb_init(void);

/* Get framebuffer info */
framebuffer_t* fb_get(void);

/* Clear screen with color */
void fb_clear(unsigned int color);

/* Draw pixel at (x, y) */
void fb_draw_pixel(int x, int y, unsigned int color);

/* Draw filled rectangle */
void fb_draw_rect(int x, int y, int width, int height, unsigned int color);

/* Draw horizontal line */
void fb_draw_hline(int x, int y, int length, unsigned int color);

/* Draw vertical line */
void fb_draw_vline(int x, int y, int length, unsigned int color);

/* Present backbuffer to screen */
void fb_present(void);

/* Enable/disable backbuffer rendering */
void fb_use_backbuffer(int enable);

/* Color definitions (32-bit BGRX8888) */
#define COLOR_BLACK     0xFF000000
#define COLOR_WHITE     0xFFFFFFFF
#define COLOR_RED       0xFFFF0000
#define COLOR_GREEN     0xFF00FF00
#define COLOR_BLUE      0xFF0000FF
#define COLOR_CYAN      0xFF00FFFF
#define COLOR_MAGENTA   0xFFFF00FF
#define COLOR_YELLOW    0xFFFFFF00
#define COLOR_GRAY      0xFF808080
#define COLOR_LIGHT_GRAY 0xFFC0C0C0
#define COLOR_DARK_BLUE 0xFF000060

/* Default framebuffer physical base (may vary by QEMU/device) */
#define FB_BASE 0x3eff0000

#endif