tiny386/vga.h at master · NanoShellOS/tiny386 · GitHub

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#ifndef VGA_H
#define VGA_H

#include <stdbool.h>

typedef struct FBDevice FBDevice;

typedef void SimpleFBDrawFunc(void *opaque,
                              int x, int y, int w, int h);

typedef struct VGAState VGAState;
VGAState *vga_init(char *vga_ram, int vga_ram_size,
                   uint8_t *fb, int width, int height);

int vga_step(VGAState *vga);
void vga_refresh(VGAState *s,
                 SimpleFBDrawFunc *redraw_func, void *opaque, int full_update);

void vga_ioport_write(VGAState *s, uint32_t addr, uint32_t val);
uint32_t vga_ioport_read(VGAState *s, uint32_t addr);

void vbe_write(VGAState *s, uint32_t offset, uint32_t val);
uint32_t vbe_read(VGAState *s, uint32_t offset);

void vga_mem_write(VGAState *s, uint32_t addr, uint8_t val);
uint8_t vga_mem_read(VGAState *s, uint32_t addr);
void vga_mem_write16(VGAState *s, uint32_t addr, uint16_t val);
void vga_mem_write32(VGAState *s, uint32_t addr, uint32_t val);
bool vga_mem_write_string(VGAState *s, uint32_t addr, uint8_t *buf, int len);

typedef struct PCIDevice PCIDevice;
typedef struct PCIBus PCIBus;
PCIDevice *vga_pci_init(VGAState *s, PCIBus *bus,
                        void *o, void (*set_bar)(void *, int, uint32_t, bool));

#ifdef BUILD_ESP32
#define BPP 16
#define SCALE_3_2
#define FULL_UPDATE
#define SWAPXY
#else
#define BPP 32
//#define BPP 16
//#define SCALE_3_2
//#define FULL_UPDATE
//#define SWAPXY  // depends on SCALE_3_2
#endif

#endif /* VGA_H */