#ifndef __VESA_HPP
#define __VESA_HPP

#include "porttype.hpp"

#pragma pack(1);

//VESA BIOS Extensions
struct SuperVGAInformation {
        uint8       signature[4];
        uint16      version;
        char far *  OEM_name;
        uint8       capabilities[4];
        uint16 far *supported_modes;
        uint8       _filler[242];
};
int VBE_GetInformation(SuperVGAInformation *info);

struct SuperVGAModeInformation {
        uint16 mode_supported : 1;
        uint16 optional_information_available : 1;
        uint16 BIOS_output_supported : 1;
        uint16 color : 1;
        uint16 graphics : 1;
        uint16 _filler1 : 11;

        uint8  windowA_exists : 1;
        uint8  windowA_readable : 1;
        uint8  windowA_writable : 1;
        uint8  _filler2 : 5;

        uint8  windowB_exists : 1;
        uint8  windowB_readable : 1;
        uint8  windowB_writable : 1;
        uint8  _filler3 : 5;

        uint16 window_granularityKB;
        uint16 window_sizeKB;
        uint16 windowA_segment;
        uint16 windowB_segment;
        void (far * window_positioning)();
        uint16 bytes_per_scanline;
        //optional, needed for OEM modes
        uint16 width;
        uint16 height;
        uint8  charcell_width;
        uint8  charcell_height;
        uint8  planes;
        uint8  bpp;
        uint8  banks;
        uint8  memory_model;
        uint8  bank_sizeKB;
        uint8  pages;
        uint8  reserved;
        //VBE 1.2+
        uint8  redmasksize;
        uint8  redfieldpos;
        uint8  greenmasksize;
        uint8  greenfieldpos;
        uint8  bluemasksize;
        uint8  bluefieldpos;
        uint8  reservedmasksize;
        uint8  reservedmaskpos;
        uint8  directcolor_info;
        uint8  _filler[216];
};
#define mm_16color 0x03
#define mm_packedpixel 0x04
#define mm_sequ256 0x05
#define mm_directcolor 0x06
#define mm_YUV 0x07
int VBE_GetModeInformation(SuperVGAModeInformation *info, int mode);

#define VVM_640x400x256   0x0100
#define VVM_640x480x256   0x0101
#define VVM_800x600x16    0x0102
#define VVM_800x600x256   0x0103
#define VVM_1024x768x16   0x0104
#define VVM_1024x768x256  0x0105
#define VVM_1280x1024x16  0x0106
#define VVM_1280x1024x256 0x0107
//text modes omitted
#define VVM_320x200x32K   0x010D
#define VVM_320x200x64K   0x010E
#define VVM_320x200x16M   0x010F
#define VVM_640x480x32K   0x0110
#define VVM_640x480x64K   0x0111
#define VVM_640x480x16M   0x0112
#define VVM_800x600x32K   0x0113
#define VVM_800x600x64K   0x0114
#define VVM_800x600x16M   0x0115
#define VVM_1024x768x32K  0x0116
#define VVM_1024x768x64K  0x0117
#define VVM_1024x768x16M  0x0118
#define VVM_1280x1024x32K 0x0119
#define VVM_1280x1024x64K 0x011A
#define VVM_1280x1024x16M 0x011B
int VBE_SetVideoMode(int mode, int clear=1);

int VBE_GetCurrentVideoMode();

int VBE_QueryVideoStateBufferBytes();
int VBE_SaveVideoState(void *buffer);
int VBE_RestoreVideoState(const void *buffer);

int VBE_SelectVideoMemoryWindow(unsigned addressG, unsigned window);

int SetDACRegisters(void *table, unsigned start, unsigned registers);

#pragma pack();

#endif