mirror of
https://github.com/gbowne1/ClassicOS.git
synced 2026-01-19 20:05:20 -08:00
68 lines
3.0 KiB
C
68 lines
3.0 KiB
C
#ifndef VESA_H
|
|
#define VESA_H
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
// VESA BIOS Extension 2.0 Function Calls
|
|
#define VBE_FUNCTION_SET_MODE 0x4F02
|
|
#define VBE_FUNCTION_GET_MODE_INFO 0x4F01
|
|
#define VBE_FUNCTION_GET_CONTROLLER_INFO 0x4F00
|
|
#define VBE_FUNCTION_SET_DISPLAY_START 0x4F05
|
|
|
|
// VESA Mode Information Structure (VBE 2.0)
|
|
typedef struct {
|
|
uint16_t ModeAttributes; // Mode attributes
|
|
uint8_t WinAAttributes; // Window A attributes
|
|
uint8_t WinBAttributes; // Window B attributes
|
|
uint16_t WinGranularity; // Window granularity
|
|
uint16_t WinSize; // Window size
|
|
uint16_t WinASegment; // Window A segment address
|
|
uint16_t WinBSegment; // Window B segment address
|
|
uint32_t WinFuncPtr; // Function pointer for window
|
|
uint16_t BytesPerScanLine; // Bytes per scanline
|
|
uint16_t XResolution; // Horizontal resolution in pixels
|
|
uint16_t YResolution; // Vertical resolution in pixels
|
|
uint8_t XCharSize; // Character cell width
|
|
uint8_t YCharSize; // Character cell height
|
|
uint8_t NumberOfPlanes; // Number of memory planes
|
|
uint8_t BitsPerPixel; // Bits per pixel
|
|
uint8_t NumberOfBanks; // Number of banks
|
|
uint8_t MemoryModel; // Memory model type
|
|
uint8_t BankSize; // Bank size in kB
|
|
uint8_t NumberOfImagePages; // Number of image pages
|
|
uint8_t Reserved0; // Reserved
|
|
uint8_t RedMaskSize; // Red mask size
|
|
uint8_t RedFieldPosition; // Red field position
|
|
uint8_t GreenMaskSize; // Green mask size
|
|
uint8_t GreenFieldPosition; // Green field position
|
|
uint8_t BlueMaskSize; // Blue mask size
|
|
uint8_t BlueFieldPosition; // Blue field position
|
|
uint8_t RsvdMaskSize; // Reserved mask size
|
|
uint8_t RsvdFieldPosition; // Reserved field position
|
|
uint8_t DirectColorModeInfo; // Direct color mode info
|
|
uint32_t PhysBasePtr; // Physical base address of the linear framebuffer
|
|
uint32_t OffScreenMemOff; // Offset to off-screen memory
|
|
uint16_t OffScreenMemSize; // Size of off-screen memory
|
|
uint8_t Reserved1[206]; // Reserved
|
|
} __attribute__((packed)) vbe_mode_info_t;
|
|
|
|
// VESA Controller Information
|
|
typedef struct {
|
|
uint8_t VESAVersion[2]; // VESA version
|
|
uint32_t OEMStringPtr; // Pointer to OEM string
|
|
uint8_t Capabilities[4]; // Capabilities of the controller
|
|
uint32_t VideoModePtr; // Pointer to supported video modes
|
|
uint16_t TotalMemory; // Total video memory (in 64KB)
|
|
uint8_t Reserved[4]; // Reserved
|
|
} __attribute__((packed)) vbe_controller_info_t;
|
|
|
|
// Function Prototypes
|
|
bool vesa_set_mode(uint16_t mode);
|
|
bool vesa_get_mode_info(uint16_t mode, vbe_mode_info_t* info);
|
|
bool vesa_get_controller_info(vbe_controller_info_t* info);
|
|
void* vesa_get_framebuffer(void);
|
|
void vesa_clear_screen(uint32_t color);
|
|
|
|
#endif // VESA_H
|