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8c70a5f38a
fpc/rtl/inc/graph/vesa.inc
Jonas Maebe 8c70a5f38a * forgot log tag in previous commit
1999-07-12 13:28:33 +00:00

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{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 1993,99 by Carl Eric Codere
This include implements VESA basic access.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
type
pModeList = ^tModeList;
tModeList = Array [0..255] of word; {list of modes terminated by -1}
{VESA modes are >=100h}
palrec = packed record { record used for set/get DAC palette }
align: byte;
blue : byte;
green: byte;
red: byte;
end;
const
{ VESA attributes }
attrSwitchDAC = $01; { DAC is switchable (1.2) }
attrNotVGACompatible = $02; { Video is NOT VGA compatible (2.0) }
attrSnowCheck = $04; { Video must use snow checking(2.0) }
{ mode attribute bits }
modeAvail = $01; { Hardware supports this mode (1.0) }
modeExtendInfo = $02; { Extended information (1.0) }
modeBIOSSupport = $04; { TTY BIOS Support (1.0) }
modeColor = $08; { This is a color mode (1.0) }
modeGraphics = $10; { This is a graphics mode (1.0) }
modeNotVGACompatible = $20; { this mode is NOT I/O VGA compatible (2.0)}
modeNoWindowed = $40; { This mode does not support Windows (2.0) }
modeLinearBuffer = $80; { This mode supports linear buffers (2.0) }
{ window attributes }
winSupported = $01;
winReadable = $02;
winWritable = $04;
{ memory model }
modelText = $00;
modelCGA = $01;
modelHerc = $02;
model4plane = $03;
modelPacked = $04;
modelModeX = $05;
modelRGB = $06;
modelYUV = $07;
TYPE
TVESAinfo = packed record { VESA Information request }
signature : array [1..4] of char; { This should be VESA }
version : word; { VESA revision }
str : pChar; { pointer to OEM string }
caps : longint; { video capabilities }
modeList : pModeList; { pointer to SVGA modes }
pad : array [18..260] of byte; { extra padding more then }
end; { VESA standard because of bugs on }
{ some video cards. }
TVESAModeInfo = packed record
attr : word; { mode attributes (1.0) }
winAAttr,
winBAttr : byte; { window attributes (1.0) }
winGranularity : word; {in K} { Window granularity (1.0) }
winSize : word; {in K} { window size (1.0) }
winASeg, { Window A Segment address (1.0) }
winBSeg : word; { Window B Segment address (1.0) }
winFunct : procedure; { Function to swtich bank }
BytesPerScanLine: word; {bytes per scan line (1.0) }
{ extended information }
xRes, yRes : word; {pixels}
xCharSize,
yCharSize : byte;
planes : byte;
bitsPixel : byte;
banks : byte;
memModel : byte;
bankSize : byte; {in K}
NumberOfPages: byte;
pad : array [29..260] of byte; { always put some more space then required}
end;
var
VESAInfo : TVESAInfo; { VESA Driver information }
ModeInfo : TVESAModeInfo; { Current Mode information }
BytesPerLine: word; { Number of bytes per scanline }
{ window management }
ReadWindow : byte; { Window number for reading. }
WriteWindow: byte; { Window number for writing. }
winReadSeg : word; { Address of segment for read }
winWriteSeg: word; { Address of segment for writes}
CurrentReadBank : integer; { active read bank }
CurrentWriteBank: integer; { active write bank }
BankShift : word; { address to shift by when switching banks. }
hasVesa: Boolean; { true if we have a VESA compatible graphics card}
{ initialized in QueryAdapterInfo in graph.inc }
function hexstr(val : longint;cnt : byte) : string;
const
HexTbl : array[0..15] of char='0123456789ABCDEF';
var
i : longint;
begin
hexstr[0]:=char(cnt);
for i:=cnt downto 1 do
begin
hexstr[i]:=hextbl[val and $f];
val:=val shr 4;
end;
end;
{$IFDEF DPMI}
function getVESAInfo(var VESAInfo: TVESAInfo) : boolean;
var
ptrlong : longint;
VESAPtr : ^TVESAInfo;
regs : TDPMIRegisters;
ModeSel: word;
offs: longint;
{ added... }
modelist: PmodeList;
modeptr : pointer;
i: longint;
RealSeg : word;
begin
{ Allocate real mode buffer }
{$ifndef fpc}
Ptrlong:=GlobalDosAlloc(sizeof(TVESAInfo));
{ Get selector value }
VESAPtr := pointer(Ptrlong shl 16);
{$else fpc}
Ptrlong:=Global_Dos_Alloc(sizeof(TVESAInfo));
Getmem(VESAPtr,SizeOf(TVESAInfo));
{$endif fpc}
{ Get segment value }
RealSeg := word(Ptrlong shr 16);
if not assigned(VESAPtr) then
RunError(203);
FillChar(regs, sizeof(TDPMIRegisters), #0);
{ Get VESA Mode information ... }
regs.eax := $4f00;
regs.es := RealSeg;
regs.edi := $00;
RealIntr($10, regs);
{$ifdef fpc}
{ no far pointer support in FPC yet, so move the vesa info into a memory }
{ block in the DS slector space (JM) }
dosmemget(RealSeg,0,VesaPtr^,SizeOf(TVESAInfo));
{$endif fpc}
if VESAPtr^.Signature <> 'VESA' then
begin
getVesaInfo := FALSE;
{$ifndef fpc}
GlobalDosFree(word(PtrLong and $ffff));
{$else fpc}
Global_Dos_Free(word(PtrLong and $ffff));
{ also free the extra allocated buffer }
Freemem(VESAPtr,SizeOf(TVESAInfo));
{$endif fpc}
exit;
end
else
getVesaInfo := TRUE;
{$ifndef fpc}
{ The mode pointer buffer points to a real mode memory }
{ Therefore steps to get the modes: }
{ 1. Allocate Selector and SetLimit to max number of }
{ of possible modes. }
ModeSel := AllocSelector(0);
SetSelectorLimit(ModeSel, 256*sizeof(word));
{ 2. Set Selector linear address to the real mode pointer }
{ returned. }
offs := longint(longint(VESAPtr^.ModeList) shr 16) shl 4;
{shouldn't the OR in the next line be a + ?? (JM)}
offs := offs OR (Longint(VESAPtr^.ModeList) and $ffff);
SetSelectorBase(ModeSel, offs);
{ copy VESA mode information to a protected mode buffer and }
{ then free the real mode buffer... }
Move(VESAPtr^, VESAInfo, sizeof(TVESAInfo));
GlobalDosFree(word(PtrLong and $ffff));
{ ModeList points to the mode list }
{ We must copy it somewhere... }
ModeList := Ptr(ModeSel, 0);
{$else fpc}
{ No far pointer support, so the Ptr(ModeSel, 0) doesn't work. }
{ Immediately copy everything to a buffer in the DS selector space }
New(ModeList);
{ The following may copy data from outside the VESA buffer, but it }
{ shouldn't get past the 1MB limit, since that would mean the buffer }
{ has been allocated in the BIOS or high memory region, which seems }
{ impossible to me (JM)}
DosMemGet(word(longint(VESAPtr^.ModeList) shr 16),
word(longint(VESAPtr^.ModeList) and $ffff), ModeList^,256*sizeof(word));
{ copy VESA mode information to a protected mode buffer and }
{ then free the real mode buffer... }
Move(VESAPtr^, VESAInfo, sizeof(TVESAInfo));
Global_Dos_Free(word(PtrLong and $ffff));
Freemem(VESAPtr,SizeOf(TVESAInfo));
{$endif fpc}
i:=0;
new(VESAInfo.ModeList);
while ModeList^[i]<> $ffff do
begin
VESAInfo.ModeList^[i] := ModeList^[i];
Inc(i);
end;
VESAInfo.ModeList^[i]:=$ffff;
{ Free the temporary selector used to get mode information }
{$ifndef fpc}
FreeSelector(ModeSel);
{$else fpc}
Dispose(ModeList);
{$endif fpc}
end;
function getModeInfo(var ModeInfo: TVESAModeInfo;mode:word):boolean;
var
Ptr: longint;
{$ifndef fpc}
VESAPtr : ^TModeInfo;
{$endif fpc}
regs : TDPMIRegisters;
RealSeg: word;
begin
{ Alllocate real mode buffer }
{$ifndef fpc}
Ptr:=GlobalDosAlloc(sizeof(TModeInfo));
{ get the selector value }
VESAPtr := pointer(longint(Ptr shl 16));
if not assigned(VESAPtr) then
RunError(203);
{$else fpc}
Ptr:=Global_Dos_Alloc(sizeof(TModeInfo));
{$endif fpc}
{ get the segment value }
RealSeg := word(Ptr shr 16);
{ setup interrupt registers }
FillChar(regs, sizeof(TDPMIRegisters), #0);
{ call VESA mode information...}
regs.eax := $4f01;
regs.es := RealSeg;
regs.edi := $00;
regs.ecx := mode;
RealIntr($10, regs);
if word(regs.eax) <> $4f then
getModeInfo := FALSE
else
getModeInfo := TRUE;
{ copy to protected mode buffer ... }
{$ifndef fpc}
Move(VESAPtr^, ModeInfo, sizeof(TModeInfo));
{$else fpc}
DosMemGet(RealSeg,0,ModeInfo,sizeof(TModeInfo));
{$endif fpc}
{ free real mode memory }
{$ifndef fpc}
GlobalDosFree(Word(Ptr and $ffff));
{$else fpc}
Global_Dos_Free(Word(Ptr and $ffff));
{$endif fpc}
end;
{$ELSE}
function getVESAInfo(var VESAInfo: TVESAInfo) : boolean; assembler;
asm
mov ax,4F00h
les di,VESAInfo
int 10h
sub ax,004Fh {make sure we got 004Fh back}
cmp ax,1
sbb al,al
cmp word ptr es:[di],'V'or('E'shl 8) {signature should be 'VESA'}
jne @@ERR
cmp word ptr es:[di+2],'S'or('A'shl 8)
je @@X
@@ERR:
mov al,0
@@X:
end;
function getModeInfo(var ModeInfo: TVESAModeInfo;mode:word):boolean;assembler;
asm
mov ax,4F01h
mov cx,mode
les di,ModeInfo
int 10h
sub ax,004Fh {make sure it's 004Fh}
cmp ax,1
sbb al,al
end;
{$ENDIF}
function SearchVESAModes(mode: Word): boolean;
{********************************************************}
{ Searches for a specific DEFINED vesa mode. If the mode }
{ is not available for some reason, then returns FALSE }
{ otherwise returns TRUE. }
{********************************************************}
var
i: word;
ModeSupported : Boolean;
begin
i:=0;
{ let's assume it's not available ... }
ModeSupported := FALSE;
{ This is a STUB VESA implementation }
if VESAInfo.ModeList^[0] = $FFFF then exit;
repeat
if VESAInfo.ModeList^[i] = mode then
begin
{ we found it, the card supports this mode... }
ModeSupported := TRUE;
break;
end;
Inc(i);
until VESAInfo.ModeList^[i] = $ffff;
{ now check if the hardware supports it... }
If ModeSupported then
begin
{ we have to init everything to zero, since VBE < 1.1 }
{ may not setup fields correctly. }
FillChar(ModeInfo, sizeof(ModeInfo), #0);
GetModeInfo(ModeInfo, Mode);
if (ModeInfo.attr and modeAvail) <> 0 then
ModeSupported := TRUE
else
ModeSupported := FALSE;
end;
SearchVESAModes := ModeSupported;
end;
procedure SetBankIndex(win: byte; BankNr: Integer); assembler;
asm
mov ax,4f05h
mov bh,00h
mov bl,[Win]
mov dx,[BankNr]
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
end;
{********************************************************}
{ There are two routines for setting banks. This may in }
{ in some cases optimize a bit some operations, if the }
{ hardware supports it, because one window is used for }
{ reading and one window is used for writing. }
{********************************************************}
procedure SetReadBank(BankNr: Integer);
begin
{ check if this is the current bank... if so do nothing. }
if BankNr = CurrentReadBank then exit;
CurrentReadBank := BankNr; { save current bank number }
BankNr := BankNr shl BankShift; { adjust to window granularity }
{ we set both banks, since one may read only }
SetBankIndex(ReadWindow, BankNr);
{ if the hardware supports only one window }
{ then there is only one single bank, so }
{ update both bank numbers. }
if ReadWindow = WriteWindow then
CurrentWriteBank := CurrentReadBank;
end;
procedure SetWriteBank(BankNr: Integer);
begin
{ check if this is the current bank... if so do nothing. }
if BankNr = CurrentWriteBank then exit;
CurrentWriteBank := BankNr; { save current bank number }
BankNr := BankNr shl BankShift; { adjust to window granularity }
{ we set both banks, since one may read only }
SetBankIndex(WriteWindow, BankNr);
{ if the hardware supports only one window }
{ then there is only one single bank, so }
{ update both bank numbers. }
if ReadWindow = WriteWindow then
CurrentReadBank := CurrentWriteBank;
end;
{************************************************************************}
{* 8-bit pixels VESA mode routines *}
{************************************************************************}
procedure PutPixVESA256(x, y : integer; color : word); far;
var
bank : word;
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
{ convert to absolute coordinates and then verify clipping...}
if ClipPixels then
Begin
if (X < StartXViewPort) or (X > (StartXViewPort + ViewWidth)) then
exit;
if (Y < StartYViewPort) or (Y > (StartYViewPort + ViewHeight)) then
exit;
end;
offs := longint(y) * BytesPerLine + x;
SetWriteBank(integer(offs shr 16));
mem[WinWriteSeg : word(offs)] := byte(color);
end;
procedure DirectPutPixVESA256(x, y : integer); far;
var
bank : word;
offs : longint;
begin
offs := longint(y) * BytesPerLine + x;
SetWriteBank(integer(offs shr 16));
mem[WinWriteSeg : word(offs)] := byte(CurrentColor);
end;
function GetPixVESA256(x, y : integer): word; far;
var
bank : word;
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
offs := longint(y) * BytesPerLine + x;
SetReadBank(integer(offs shr 16));
GetPixVESA256:=mem[WinWriteSeg : word(offs)];
end;
{************************************************************************}
{* 15/16bit pixels VESA mode routines *}
{************************************************************************}
procedure PutPixVESA32k(x, y : integer; color : word); far;
var
bank : word;
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
{ convert to absolute coordinates and then verify clipping...}
if ClipPixels then
Begin
if (X < StartXViewPort) or (X > (StartXViewPort + ViewWidth)) then
exit;
if (Y < StartYViewPort) or (Y > (StartYViewPort + ViewHeight)) then
exit;
end;
offs := longint(y) * BytesPerLine + 2*x;
SetWriteBank(integer(offs shr 16));
memW[WinWriteSeg : word(offs)] := color;
end;
procedure PutPixVESA64k(x, y : integer; color : word); far;
var
bank : word;
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
{ convert to absolute coordinates and then verify clipping...}
if ClipPixels then
Begin
if (X < StartXViewPort) or (X > (StartXViewPort + ViewWidth)) then
exit;
if (Y < StartYViewPort) or (Y > (StartYViewPort + ViewHeight)) then
exit;
end;
offs := longint(y) * BytesPerLine + 2*x;
SetWriteBank(integer(offs shr 16));
memW[WinWriteSeg : word(offs)] := color;
end;
function GetPixVESA32k(x, y : integer): word; far;
var
bank : word;
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
offs := longint(y) * BytesPerLine + 2*x;
SetReadBank(integer(offs shr 16));
GetPixVESA32k:=memW[WinWriteSeg : word(offs)];
end;
function GetPixVESA64k(x, y : integer): word; far;
var
bank : word;
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
offs := longint(y) * BytesPerLine + 2*x;
SetReadBank(integer(offs shr 16));
GetPixVESA64k:=memW[WinWriteSeg : word(offs)];
end;
procedure DirectPutPixVESA32k(x, y : integer); far;
var
bank : word;
offs : longint;
begin
offs := longint(y) * BytesPerLine + 2*x;
SetWriteBank(integer((offs shr 16) and $ff));
memW[WinWriteSeg : word(offs)] := CurrentColor;
end;
procedure DirectPutPixVESA64k(x, y : integer); far;
var
bank : word;
offs : longint;
begin
offs := longint(y) * BytesPerLine + 2*x;
SetWriteBank(integer(offs shr 16));
memW[WinWriteSeg : word(offs)] := CurrentColor;
end;
{************************************************************************}
{* 4-bit pixels VESA mode routines *}
{************************************************************************}
procedure PutPixVESA16(x, y : integer; color : word); far;
var
bank : word;
offs : longint;
dummy_read : byte;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
{ convert to absolute coordinates and then verify clipping...}
if ClipPixels then
Begin
if (X < StartXViewPort) or (X > (StartXViewPort + ViewWidth)) then
exit;
if (Y < StartYViewPort) or (Y > (StartYViewPort + ViewHeight)) then
exit;
end;
{ this can be done only once at InitGraph }
PortW[$3C4] := $0f02;
PortW[$3CE] := $0003;
PortW[$3CE] := $0205;
{ }
offs := longint(y) * BytesPerLine + (x div 8);
SetWriteBank(integer(offs shr 16));
port[$3CE] := $08;
port[$3CF] := ($80 shr (x and 7));
dummy_read := mem[WinWriteSeg : word(offs)];
mem[winWriteSeg : offs] := byte(color);
{ this can be done only once at DoneGraph..}
PortW[$3CE] := $FF08;
PortW[$3CE] := $0005;
{ }
end;
procedure DirectPutPixVESA16(x, y : integer); far;
var
bank : word;
offs : longint;
dummy_read : byte;
begin
{ this can be done only once at InitGraph }
PortW[$3C4] := $0f02;
PortW[$3CE] := $0003;
PortW[$3CE] := $0205;
{ }
offs := longint(y) * BytesPerLine + (x div 8);
SetWriteBank(integer(offs shr 16));
port[$3CE] := $08;
port[$3CF] := ($80 shr (x and 7));
dummy_read := mem[WinWriteSeg : word(offs)];
mem[winWriteSeg : offs] := byte(CurrentColor);
{ this can be done only once at DoneGraph..}
PortW[$3CE] := $FF08;
PortW[$3CE] := $0005;
{ }
end;
{************************************************************************}
{* VESA Palette entries *}
{************************************************************************}
{$IFDEF DPMI}
Procedure SetVESARGBPalette(ColorNum, RedValue, GreenValue,
BlueValue : Integer);
var
FunctionNr : byte; { use blankbit or normal RAMDAC programming? }
pal: palrec;
Error : boolean; { VBE call error }
regs: TDPMIRegisters;
Ptr: longint;
{$ifndef fpc}
PalPtr : ^PalRec;
{$endif fpc}
RealSeg: word;
begin
if DirectColor then
Begin
_GraphResult := grError;
exit;
end;
Error := TRUE;
pal.align := 0;
pal.red := byte(RedValue);
pal.green := byte(GreenValue);
pal.blue := byte(BlueValue);
{ use the set/get palette function }
if VESAInfo.Version >= $0200 then
Begin
{ check if blanking bit must be set when programming }
{ the RAMDAC. }
if (VESAInfo.caps and attrSnowCheck) <> 0 then
FunctionNr := $80
else
FunctionNr := $00;
{ Alllocate real mode buffer }
{$ifndef fpc}
Ptr:=GlobalDosAlloc(sizeof(palrec));
{ get the selector values }
PalPtr := pointer(Ptr shl 16);
if not assigned(PalPtr) then
RunError(203);
{$else fpc}
Ptr:=Global_Dos_Alloc(sizeof(palrec));
{$endif fpc}
{get the segment value}
RealSeg := word(Ptr shr 16);
{ setup interrupt registers }
FillChar(regs, sizeof(TDPMIRegisters), #0);
{ copy palette values to real mode buffer }
{$ifndef fpc}
move(pal, palptr^, sizeof(palrec));
{$else fpc}
DosMemPut(RealSeg,0,pal,sizeof(palrec));
{$endif fpc}
regs.eax := $4F09;
regs.ebx := FunctionNr;
regs.ecx := $01;
regs.edx := ColorNum;
regs.es := RealSeg;
regs.edi := 0; { offset is always zero }
RealIntr($10, regs);
{ free real mode memory }
{$ifndef fpc}
GlobalDosFree(word(Ptr and $ffff));
{$else fpc}
Global_Dos_Free(word(Ptr and $ffff));
{$endif fpc}
if word(regs.eax) <> $004F then
begin
_GraphResult := grError;
exit;
end;
end
else
{ assume it's fully VGA compatible palette-wise. }
Begin
SetVGARGBPalette(ColorNum, RedValue, GreenValue, BlueValue);
end;
end;
Procedure GetVESARGBPalette(ColorNum: integer; Var
RedValue, GreenValue, BlueValue : integer);
var
pal: PalRec;
Error: boolean;
palptr : ^PalRec;
regs : TDPMIRegisters;
RealSeg: word;
ptr: longint;
begin
if DirectColor then
Begin
_GraphResult := grError;
exit;
end;
{ use the set/get palette function }
if VESAInfo.Version >= $0200 then
Begin
{ Alllocate real mode buffer }
{$ifndef fpc}
Ptr:=GlobalDosAlloc(sizeof(palrec));
{ get the selector value }
PalPtr := pointer(longint(Ptr and $0000ffff) shl 16);
if not assigned(PalPtr) then
RunError(203);
{$else fpc}
Ptr:=Global_Dos_Alloc(sizeof(palrec));
{$endif fpc}
{ get the segment value }
RealSeg := word(Ptr shr 16);
{ setup interrupt registers }
FillChar(regs, sizeof(TDPMIRegisters), #0);
regs.eax := $4F09;
regs.ebx := $01; { get palette data }
regs.ecx := $01;
regs.edx := ColorNum;
regs.es := RealSeg;
regs.edi := 0; { offset is always zero }
RealIntr($10, regs);
{ copy to protected mode buffer ... }
{$ifndef fpc}
Move(PalPtr^, Pal, sizeof(palrec));
{$else fpc}
DosMemGet(RealSeg,0,Pal,sizeof(palrec));
{$endif fpc}
{ free real mode memory }
{$ifndef fpc}
GlobalDosFree(word(Ptr and $ffff));
{$else fpc}
Global_Dos_Free(word(Ptr and $ffff));
{$endif fpc}
if word(regs.eax) <> $004F then
begin
_GraphResult := grError;
exit;
end
else
begin
RedValue := Integer(pal.Red);
GreenValue := Integer(pal.Green);
BlueValue := Integer(pal.Blue);
end;
end
else
GetVGARGBPalette(ColorNum, RedValue, GreenValue, BlueValue);
end;
{$ELSE}
Procedure SetVESARGBPalette(ColorNum, RedValue, GreenValue,
BlueValue : Integer); far;
var
FunctionNr : byte; { use blankbit or normal RAMDAC programming? }
pal: ^palrec;
Error : boolean; { VBE call error }
begin
if DirectColor then
Begin
_GraphResult := grError;
exit;
end;
Error := FALSE;
new(pal);
if not assigned(pal) then RunError(203);
pal^.align := 0;
pal^.red := byte(RedValue);
pal^.green := byte(GreenValue);
pal^.blue := byte(BlueValue);
{ use the set/get palette function }
if VESAInfo.Version >= $0200 then
Begin
{ check if blanking bit must be set when programming }
{ the RAMDAC. }
if (VESAInfo.caps and attrSnowCheck) <> 0 then
FunctionNr := $80
else
FunctionNr := $00;
asm
mov ax, 4F09h { Set/Get Palette data }
mov bl, [FunctionNr] { Set palette data }
mov cx, 01h { update one palette reg. }
mov dx, [ColorNum] { register number to update }
les di, [pal] { get palette address }
int 10h
cmp ax, 004Fh { check if success }
jz @noerror
mov [Error], TRUE
@noerror:
end;
if not Error then
Dispose(pal)
else
begin
_GraphResult := grError;
exit;
end;
end
else
{ assume it's fully VGA compatible palette-wise. }
Begin
SetVGARGBPalette(ColorNum, RedValue, GreenValue, BlueValue);
end;
end;
Procedure GetVESARGBPalette(ColorNum: integer; Var
RedValue, GreenValue, BlueValue : integer); far;
var
Error: boolean;
pal: ^palrec;
begin
if DirectColor then
Begin
_GraphResult := grError;
exit;
end;
Error := FALSE;
new(pal);
if not assigned(pal) then RunError(203);
FillChar(pal^, sizeof(palrec), #0);
{ use the set/get palette function }
if VESAInfo.Version >= $0200 then
Begin
asm
mov ax, 4F09h { Set/Get Palette data }
mov bl, 01h { Set palette data }
mov cx, 01h { update one palette reg. }
mov dx, [ColorNum] { register number to update }
les di, [pal] { get palette address }
int 10h
cmp ax, 004Fh { check if success }
jz @noerror
mov [Error], TRUE
@noerror:
end;
if not Error then
begin
RedValue := Integer(pal^.Red);
GreenValue := Integer(pal^.Green);
BlueValue := Integer(pal^.Blue);
Dispose(pal);
end
else
begin
_GraphResult := grError;
exit;
end;
end
else
GetVGARGBPalette(ColorNum, RedValue, GreenValue, BlueValue);
end;
{$ENDIF}
procedure SetupLinear(var ModeInfo: TVESAModeInfo);
begin
{ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! }
end;
procedure SetupWindows(var ModeInfo: TVESAModeInfo);
begin
{ now we check the windowing scheme ...}
if (ModeInfo.WinAAttr and WinSupported) <> 0 then
{ is this window supported ... }
begin
{ now check if the window is R/W }
if (ModeInfo.WinAAttr and WinReadable) <> 0 then
begin
ReadWindow := 0;
WinReadSeg := ModeInfo.WinASeg;
end;
if (ModeInfo.WinAAttr and WinWritable) <> 0 then
begin
WriteWindow := 0;
WinWriteSeg := ModeInfo.WinASeg;
end;
end;
if (ModeInfo.WinBAttr and WinSupported) <> 0 then
{ is this window supported ... }
begin
{ OPTIMIZATION ... }
{ if window A supports both read/write, then we try to optimize }
{ everything, by using a different window for Read and/or write.}
if (WinReadSeg <> 0) and (WinWriteSeg <> 0) then
begin
{ check if winB supports read }
if (ModeInfo.WinBAttr and winReadable) <> 0 then
begin
WinReadSeg := ModeInfo.WinBSeg;
ReadWindow := 1;
end
else
{ check if WinB supports write }
if (ModeInfo.WinBAttr and WinWritable) <> 0 then
begin
WinWriteSeg := ModeInfo.WinBSeg;
WriteWindow := 1;
end;
end
else
{ Window A only supported Read OR Write, no we have to make }
{ sure that window B supports the other mode. }
if (WinReadSeg = 0) and (WinWriteSeg<>0) then
begin
if (ModeInfo.WinBAttr and WinReadable <> 0) then
begin
ReadWindow := 1;
WinReadSeg := ModeInfo.WinBSeg;
end
else
{ impossible, this VESA mode is WRITE only! }
begin
WriteLn('Invalid VESA Window attribute.');
Halt(255);
end;
end
else
if (winWriteSeg = 0) and (WinReadSeg<>0) then
begin
if (ModeInfo.WinBAttr and WinWritable) <> 0 then
begin
WriteWindow := 1;
WinWriteSeg := ModeInfo.WinBSeg;
end
else
{ impossible, this VESA mode is READ only! }
begin
WriteLn('Invalid VESA Window attribute.');
Halt(255);
end;
end
else
if (winReadSeg = 0) and (winWriteSeg = 0) then
{ no read/write in this mode! }
begin
WriteLn('Invalid VESA Window attribute.');
Halt(255);
end;
end;
{ if both windows are not supported, then we can assume }
{ that there is ONE single NON relocatable window. }
if (WinWriteSeg = 0) and (WinReadSeg = 0) then
begin
WinWriteSeg := ModeInfo.WinASeg;
WinReadSeg := ModeInfo.WinASeg;
end;
{ 16-bit Protected mode checking code... }
{ change segment values to protected mode }
{ selectors. }
if WinReadSeg = $A000 then
WinReadSeg := SegA000
else
if WinReadSeg = $B000 then
WinReadSeg := SegB000
else
if WinReadSeg = $B800 then
WinReadSeg := SegB800
else
begin
WriteLn('Invalid segment address.');
Halt(255);
end;
if WinWriteSeg = $A000 then
WinWriteSeg := SegA000
else
if WinWriteSeg = $B000 then
WinWriteSeg := SegB000
else
if WinWriteSeg = $B800 then
WinWriteSeg := SegB800
else
begin
WriteLn('Invalid segment address.');
Halt(255);
end;
end;
function setVESAMode(mode:word):boolean;
var i:word;
begin
{ Init mode information, for compatibility with VBE < 1.1 }
FillChar(ModeInfo, sizeof(ModeInfo), #0);
{ get the video mode information }
if getModeInfo(modeinfo, mode) then
begin
{ checks if the hardware supports the video mode. }
if (ModeInfo.attr and modeAvail) <> 0 then
begin
SetVESAMode := TRUE;
end
else
begin
SetVESAmode := TRUE;
_GraphResult := grError;
exit;
end;
BankShift := 0;
while (64 shl BankShift) <> ModeInfo.WinGranularity do
Inc(BankShift);
CurrentWriteBank := -1;
CurrentReadBank := -1;
BytesPerLine := ModeInfo.BytesPerScanLine;
{ These are the window adresses ... }
WinWriteSeg := 0; { This is the segment to use for writes }
WinReadSeg := 0; { This is the segment to use for reads }
ReadWindow := 0;
WriteWindow := 0;
{ VBE 2.0 and higher supports >= non VGA linear buffer types...}
{ this is backward compatible. }
if ((ModeInfo.Attr and ModeNoWindowed) <> 0) and
((ModeInfo.Attr and ModeLinearBuffer) <> 0) then
SetupLinear(ModeInfo)
else
{ if linear and windowed is supported, then use windowed }
{ method. }
SetUpWindows(ModeInfo);
asm
mov ax,4F02h
mov bx,mode
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
sub ax,004Fh
cmp ax,1
sbb al,al
mov @RESULT,al
end;
end;
end;
function getVESAMode:word;assembler;
asm {return -1 if error}
mov ax,4F03h
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
cmp ax,004Fh
je @@OK
mov ax,-1
jmp @@X
@@OK:
mov ax,bx
@@X:
end;
{************************************************************************}
{* VESA Modes inits *}
{************************************************************************}
procedure Init1280x1024x64k; far;
begin
SetVesaMode(m1280x1024x64k);
end;
procedure Init1280x1024x32k; far;
begin
SetVESAMode(m1280x1024x32k);
end;
procedure Init1280x1024x256; far;
begin
SetVESAMode(m1280x1024x256);
end;
procedure Init1280x1024x16; far;
begin
SetVESAMode(m1280x1024x16);
end;
procedure Init1024x768x64k; far;
begin
SetVESAMode(m1024x768x64k);
end;
procedure Init640x480x32k; far;
begin
SetVESAMode(m640x480x32k);
end;
procedure Init1024x768x256; far;
begin
SetVESAMode(m1024x768x256);
end;
procedure Init1024x768x16; far;
begin
SetVESAMode(m1024x768x16);
end;
procedure Init800x600x64k; far;
begin
SetVESAMode(m800x600x64k);
end;
procedure Init800x600x32k; far;
begin
SetVESAMode(m800x600x32k);
end;
procedure Init800x600x256; far;
begin
SetVESAMode(m800x600x256);
end;
procedure Init800x600x16; far;
begin
SetVesaMode(m800x600x16);
end;
procedure Init640x480x64k; far;
begin
SetVESAMode(m640x480x64k);
end;
procedure Init640x480x256; far;
begin
SetVESAMode(m640x480x256);
end;
procedure Init640x400x256; far;
begin
SetVESAMode(m640x400x256);
end;
procedure Init320x200x64k; far;
begin
SetVESAMode(m320x200x64k);
end;
procedure Init320x200x32k; far;
begin
SetVESAMode(m320x200x32k);
end;
{$IFDEF DPMI}
Procedure SaveStateVESA;
var
PtrLong: longint;
regs: TDPMIRegisters;
begin
SaveSupported := FALSE;
SavePtr := nil;
{ Get the video mode }
asm
mov ah,0fh
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
mov [VideoMode], al
end;
{ Prepare to save video state...}
asm
mov ax, 4F04h { get buffer size to save state }
mov dx, 00h
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
mov [StateSize], bx
cmp al,04fh
jnz @notok
mov [SaveSupported],TRUE
@notok:
end;
if SaveSupported then
begin
{$ifndef fpc}
PtrLong:=GlobalDosAlloc(64*StateSize); { values returned in 64-byte blocks }
{$else fpc}
PtrLong:=Global_Dos_Alloc(64*StateSize); { values returned in 64-byte blocks }
{$endif fpc}
if PtrLong = 0 then
RunError(203);
SavePtr := pointer(longint(PtrLong and $0000ffff) shl 16);
{$ifndef fpc}
{ In FPC mode, we can't do anything with this (no far pointers) }
{ However, we still need to keep it to be able to free the }
{ memory afterwards. Since this data is not accessed in PM code, }
{ there's no need to save it in a seperate buffer (JM) }
if not assigned(SavePtr) then
RunError(203);
{$endif fpc}
RealStateSeg := word(PtrLong shr 16);
FillChar(regs, sizeof(regs), #0);
{ call the real mode interrupt ... }
regs.eax := $4F04; { save the state buffer }
regs.ecx := $0F; { Save DAC / Data areas / Hardware states }
regs.edx := $01; { save state }
regs.es := RealStateSeg;
regs.ebx := 0;
RealIntr($10,regs);
FillChar(regs, sizeof(regs), #0);
{ restore state, according to Ralph Brown Interrupt list }
{ some BIOS corrupt the hardware after a save... }
regs.eax := $4F04; { restore the state buffer }
regs.ecx := $0F; { rest DAC / Data areas / Hardware states }
regs.edx := $02;
regs.es := RealStateSeg;
regs.ebx := 0;
RealIntr($10,regs);
end;
end;
procedure RestoreStateVESA;
var
regs:TDPMIRegisters;
begin
{ go back to the old video mode...}
asm
mov ah,00
mov al,[VideoMode]
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
end;
{ then restore all state information }
{$ifndef fpc}
if assigned(SavePtr) and (SaveSupported=TRUE) then
{$else fpc}
{ No far pointer support, so it's possible that that assigned(SavePtr) }
{ would return false under FPC. Just check if it's different from nil. }
if (SavePtr <> nil) and (SaveSupported=TRUE) then
{$endif fpc}
begin
FillChar(regs, sizeof(regs), #0);
{ restore state, according to Ralph Brown Interrupt list }
{ some BIOS corrupt the hardware after a save... }
regs.eax := $4F04; { restore the state buffer }
regs.ecx := $0F; { rest DAC / Data areas / Hardware states }
regs.edx := $02; { restore state }
regs.es := RealStateSeg;
regs.ebx := 0;
RealIntr($10,regs);
{$ifndef fpc}
if GlobalDosFree(longint(SavePtr) shr 16)<>0 then
{$else fpc}
if Not(Global_Dos_Free(longint(SavePtr) shr 16)) then
{$endif fpc}
RunError(216);
SavePtr := nil;
end;
end;
{$ELSE}
{**************************************************************}
{* Real mode routines *}
{**************************************************************}
Procedure SaveStateVESA; far;
begin
SavePtr := nil;
SaveSupported := FALSE;
{ Get the video mode }
asm
mov ah,0fh
int 10h
mov [VideoMode], al
end;
{ Prepare to save video state...}
asm
mov ax, 1C00h { get buffer size to save state }
mov cx, 00000111b { Save DAC / Data areas / Hardware states }
int 10h
mov [StateSize], bx
cmp al,01ch
jnz @notok
mov [SaveSupported],TRUE
@notok:
end;
if SaveSupported then
Begin
GetMem(SavePtr, 64*StateSize); { values returned in 64-byte blocks }
if not assigned(SavePtr) then
RunError(203);
asm
mov ax, 4F04h { save the state buffer }
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
mov dx, 01h
mov es, WORD PTR [SavePtr+2]
mov bx, WORD PTR [SavePtr]
int 10h
end;
{ restore state, according to Ralph Brown Interrupt list }
{ some BIOS corrupt the hardware after a save... }
asm
mov ax, 4F04h { save the state buffer }
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
mov dx, 02h
mov es, WORD PTR [SavePtr+2]
mov bx, WORD PTR [SavePtr]
int 10h
end;
end;
end;
procedure RestoreStateVESA; far;
begin
{ go back to the old video mode...}
asm
mov ah,00
mov al,[VideoMode]
int 10h
end;
{ then restore all state information }
if assigned(SavePtr) and (SaveSupported=TRUE) then
begin
{ restore state, according to Ralph Brown Interrupt list }
asm
mov ax, 4F04h { save the state buffer }
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
mov dx, 02h { restore state }
mov es, WORD PTR [SavePtr+2]
mov bx, WORD PTR [SavePtr]
int 10h
end;
FreeMem(SavePtr, 64*StateSize);
SavePtr := nil;
end;
end;
{$ENDIF DPMI}
{************************************************************************}
{* VESA Page flipping routines *}
{************************************************************************}
{ Note: These routines, according to the VBE3 specification, will NOT }
{ work with the 24 bpp modes, because of the alignment. }
{************************************************************************}
procedure SetVisualVESA(page: word); far;
{ two page support... }
begin
if page > HardwarePages then exit;
end;
procedure SetActiveVESA(page: word); far;
{ two page support... }
begin
end;
{
$Log$
Revision 1.5 1999-07-12 13:28:33 jonas
* forgot log tag in previous commit
}
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