144 lines
4.2 KiB
C
144 lines
4.2 KiB
C
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/* -*- Mode: C; c-basic-offset: 3 -*-
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*
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* vbe.h - Support for the VESA BIOS Extension (VBE) video interface.
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*
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* This file is part of Metalkit, a simple collection of modules for
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* writing software that runs on the bare metal. Get the latest code
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* at http://svn.navi.cx/misc/trunk/metalkit/
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*
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* Copyright (c) 2008-2009 Micah Dowty
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __VBE_H__
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#define __VBE_H__
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#include "types.h"
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#include "bios.h"
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#define SIGNATURE_VESA 0x41534556
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#define SIGNATURE_VBE2 0x32454256
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#define MAX_SUPPORTED_MODES 128
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#define VBE_MODEATTR_SUPPORTED (1 << 0)
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#define VBE_MODEATTR_VBE1_2 (1 << 1)
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#define VBE_MODEATTR_BIOS_SUPPORTED (1 << 2)
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#define VBE_MODEATTR_COLOR (1 << 3)
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#define VBE_MODEATTR_GRAPHICS (1 << 4)
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#define VBE_MODEATTR_NONVGA (1 << 5)
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#define VBE_MODEATTR_NOBANKED (1 << 6)
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#define VBE_MODEATTR_LINEAR (1 << 7)
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#define VBE_MODEATTR_DOUBLESCAN (1 << 8)
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#define VBE_MODEFLAG_LINEAR 0x4000
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#define VBE_MEMTYPE_TEXT 0x00
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#define VBE_MEMTYPE_CGA 0x01
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#define VBE_MEMTYPE_HGC 0x02
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#define VBE_MEMTYPE_EGA 0x03
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#define VBE_MEMTYPE_PACKED 0x04
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#define VBE_MEMTYPE_DIRECT 0x06
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typedef struct {
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uint32 signature;
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union {
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uint16 version;
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struct {
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uint8 verMinor;
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uint8 verMajor;
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};
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};
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far_ptr_t oemString;
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uint32 capabilities;
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far_ptr_t videoModes;
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uint16 totalMemory;
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/* VBE 2.0 */
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uint16 oemVersion;
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far_ptr_t vendorName;
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far_ptr_t productName;
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far_ptr_t productRev;
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uint16 vbeAFVersion;
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far_ptr_t accelModes;
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} PACKED VBEControllerInfo;
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typedef struct {
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uint16 attributes;
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uint8 winA, winB;
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uint16 granularity;
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uint16 winSize;
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uint16 segmentA, segmentB;
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far_ptr_t winFunc;
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uint16 bytesPerLine;
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/* OEM mode info */
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uint16 width;
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uint16 height;
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uint8 cellWidth;
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uint8 cellHeight;
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uint8 numPlanes;
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uint8 bitsPerPixel;
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uint8 numBanks;
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uint8 memType;
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uint8 bankSizeKB;
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uint8 pageFit;
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uint8 reserved;
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/* VBE 1.2+ */
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struct {
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uint8 maskSize;
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uint8 fieldPos;
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} red, green, blue, reservedChannel;
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uint8 directColorInfo;
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/* VBE 2.0+ */
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void *linearAddress;
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void *offscreenAddress;
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uint16 offscreenSizeKB;
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} PACKED VBEModeInfo;
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typedef struct {
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VBEControllerInfo cInfo;
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uint8 numModes;
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uint16 modes[MAX_SUPPORTED_MODES];
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struct {
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uint16 mode;
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uint16 flags;
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VBEModeInfo info;
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} current;
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} VBEState;
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extern VBEState gVBE;
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fastcall Bool VBE_Init();
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fastcall void VBE_GetModeInfo(uint16 mode, VBEModeInfo *info);
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fastcall void VBE_SetMode(uint16 mode, uint16 modeFlags);
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fastcall void VBE_SetStartAddress(int x, int y);
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fastcall void VBE_SetPalette(int firstColor, int numColors, uint32 *colors);
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fastcall void VBE_InitSimple(int width, int height, int bpp);
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#endif /* __VBE_H_ */
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