{
$Id: vesa.inc,v 1.9 2002/09/07 16:01:19 peter Exp $
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 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
palrec = packed record { record used for set/get DAC palette }
blue, green, red, align: 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 = $07;
{$ifndef dpmi}
{$i vesah.inc}
{ otherwise it's already included in graph.pp }
{$endif dpmi}
var
BytesPerLine: word; { Number of bytes per scanline }
YOffset : word; { Pixel offset for VESA page flipping }
{ 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. }
{ linear mode specific stuff }
InLinear : boolean; { true if in linear mode }
LinearPageOfs : longint; { offset used to set active page }
FrameBufferLinearAddress : longint;
ScanLines: word; { maximum number of scan lines for mode }
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;
st : string[4];
regs : TDPMIRegisters;
{$ifndef fpc}
ModeSel: word;
offs: longint;
{$endif fpc}
{ added... }
modelist: PmodeList;
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));
New(VESAPtr);
{$endif fpc}
{ Get segment value }
RealSeg := word(Ptrlong shr 16);
if not assigned(VESAPtr) then
RunError(203);
FillChar(regs, sizeof(regs), #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));
{$endif fpc}
St:=Vesaptr^.signature;
if st<>'VESA' then
begin
{$ifdef logging}
LogLn('No VESA detected.');
{$endif logging}
getVesaInfo := FALSE;
{$ifndef fpc}
GlobalDosFree(word(PtrLong and $ffff));
{$else fpc}
If not Global_Dos_Free(word(PtrLong and $ffff)) then
RunError(216);
{ also free the extra allocated buffer }
Dispose(VESAPtr);
{$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(VESAInfo));
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(VESAInfo));
If not Global_Dos_Free(word(PtrLong and $ffff)) then
RunError(216);
Dispose(VESAPtr);
{$endif fpc}
i:=0;
new(VESAInfo.ModeList);
while ModeList^[i]<> $ffff do
begin
{$ifdef logging}
LogLn('Found mode $'+hexstr(ModeList^[i],4));
{$endif loggin}
VESAInfo.ModeList^[i] := ModeList^[i];
Inc(i);
end;
VESAInfo.ModeList^[i]:=$ffff;
{ Free the temporary selector used to get mode information }
{$ifdef logging}
LogLn(strf(i) + ' modes found.');
{$endif logging}
{$ifndef fpc}
FreeSelector(ModeSel);
{$else fpc}
Dispose(ModeList);
{$endif fpc}
end;
function getVESAModeInfo(var ModeInfo: TVESAModeInfo;mode:word):boolean;
var
Ptr: longint;
{$ifndef fpc}
VESAPtr : ^TVESAModeInfo;
{$endif fpc}
regs : TDPMIRegisters;
RealSeg: word;
begin
{ Alllocate real mode buffer }
{$ifndef fpc}
Ptr:=GlobalDosAlloc(sizeof(TVESAModeInfo));
{ get the selector value }
VESAPtr := pointer(longint(Ptr shl 16));
if not assigned(VESAPtr) then
RunError(203);
{$else fpc}
Ptr:=Global_Dos_Alloc(sizeof(TVESAModeInfo));
{$endif fpc}
{ get the segment value }
RealSeg := word(Ptr shr 16);
{ setup interrupt registers }
FillChar(regs, sizeof(regs), #0);
{ call VESA mode information...}
regs.eax := $4f01;
regs.es := RealSeg;
regs.edi := $00;
regs.ecx := mode;
RealIntr($10, regs);
if word(regs.eax) <> $4f then
getVESAModeInfo := FALSE
else
getVESAModeInfo := TRUE;
{ copy to protected mode buffer ... }
{$ifndef fpc}
Move(VESAPtr^, ModeInfo, sizeof(ModeInfo));
{$else fpc}
DosMemGet(RealSeg,0,ModeInfo,sizeof(ModeInfo));
{$endif fpc}
{ free real mode memory }
{$ifndef fpc}
GlobalDosFree(Word(Ptr and $ffff));
{$else fpc}
If not Global_Dos_Free(Word(Ptr and $ffff)) then
RunError(216);
{$endif fpc}
end;
{$ELSE}
function getVESAInfo(var VESAInfo: TVESAInfo) : boolean; assembler;
asm
mov ax,4F00h
les di,VESAInfo
int 10h
sub ax,004Fh {make sure we got 004Fh back}
cmp ax,1
sbb al,al
cmp word ptr es:[di],'V'or('E'shl 8) {signature should be 'VESA'}
jne @@ERR
cmp word ptr es:[di+2],'S'or('A'shl 8)
je @@X
@@ERR:
mov al,0
@@X:
end;
function getVESAModeInfo(var ModeInfo: TVESAModeInfo;mode:word):boolean;assembler;
asm
mov ax,4F01h
mov cx,mode
les di,ModeInfo
int 10h
sub ax,004Fh {make sure it's 004Fh}
cmp ax,1
sbb al,al
end;
{$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] = $ffff;
{ now check if the hardware supports it... }
If ModeSupported then
begin
{ we have to init everything to zero, since VBE < 1.1 }
{ may not setup fields correctly. }
FillChar(VESAModeInfo, sizeof(VESAModeInfo), #0);
If GetVESAModeInfo(VESAModeInfo, Mode) And
((VESAModeInfo.attr and modeAvail) <> 0) then
ModeSupported := TRUE
else
ModeSupported := FALSE;
end;
SearchVESAModes := ModeSupported;
end;
procedure SetBankIndex(win: byte; BankNr: Integer); assembler;
asm
mov ax,4f05h
mov bh,00h
mov bl,[Win]
mov dx,[BankNr]
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
end;
{********************************************************}
{ There are two routines for setting banks. This may in }
{ in some cases optimize a bit some operations, if the }
{ hardware supports it, because one window is used for }
{ reading and one window is used for writing. }
{********************************************************}
procedure SetReadBank(BankNr: Integer);
begin
{ check if this is the current bank... if so do nothing. }
if BankNr = CurrentReadBank then exit;
{$ifdef logging}
{ LogLn('Setting read bank to '+strf(BankNr));}
{$endif logging}
CurrentReadBank := BankNr; { save current bank number }
BankNr := BankNr shl BankShift; { adjust to window granularity }
{ we set both banks, since one may read only }
SetBankIndex(ReadWindow, BankNr);
{ if the hardware supports only one window }
{ then there is only one single bank, so }
{ update both bank numbers. }
if ReadWindow = WriteWindow then
CurrentWriteBank := CurrentReadBank;
end;
procedure SetWriteBank(BankNr: Integer);
begin
{ check if this is the current bank... if so do nothing. }
if BankNr = CurrentWriteBank then exit;
{$ifdef logging}
{ LogLn('Setting write bank to '+strf(BankNr));}
{$endif logging}
CurrentWriteBank := BankNr; { save current bank number }
BankNr := BankNr shl BankShift; { adjust to window granularity }
{ we set both banks, since one may read only }
SetBankIndex(WriteWindow, BankNr);
{ if the hardware supports only one window }
{ then there is only one single bank, so }
{ update both bank numbers. }
if ReadWindow = WriteWindow then
CurrentReadBank := CurrentWriteBank;
end;
{************************************************************************}
{* 8-bit pixels VESA mode routines *}
{************************************************************************}
procedure PutPixVESA256(x, y : integer; color : word); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
{ convert to absolute coordinates and then verify clipping...}
if ClipPixels then
Begin
if (X < StartXViewPort) or (X > (StartXViewPort + ViewWidth)) then
exit;
if (Y < StartYViewPort) or (Y > (StartYViewPort + ViewHeight)) then
exit;
end;
Y := Y + YOffset; { adjust pixel for correct virtual page }
offs := longint(y) * BytesPerLine + x;
begin
SetWriteBank(integer(offs shr 16));
mem[WinWriteSeg : word(offs)] := byte(color);
end;
end;
procedure DirectPutPixVESA256(x, y : integer); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
col : byte;
begin
offs := (longint(y) + YOffset) * BytesPerLine + x;
Case CurrentWriteMode of
XorPut:
Begin
SetReadBank(integer(offs shr 16));
col := mem[WinReadSeg : word(offs)] xor byte(CurrentColor);
End;
AndPut:
Begin
SetReadBank(integer(offs shr 16));
col := mem[WinReadSeg : word(offs)] And byte(CurrentColor);
End;
OrPut:
Begin
SetReadBank(integer(offs shr 16));
col := mem[WinReadSeg : word(offs)] or byte(currentcolor);
End
else
Begin
If CurrentWriteMode <> NotPut then
col := Byte(CurrentColor)
else col := Not(Byte(CurrentColor));
End
End;
SetWriteBank(integer(offs shr 16));
mem[WinWriteSeg : word(offs)] := Col;
end;
function GetPixVESA256(x, y : integer): word; {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort + YOffset;
offs := longint(y) * BytesPerLine + x;
SetReadBank(integer(offs shr 16));
GetPixVESA256:=mem[WinReadSeg : word(offs)];
end;
Procedure GetScanLineVESA256(x1, x2, y: integer; var data); {$ifndef fpc}far;{$endif}
var offs: Longint;
l, amount, bankrest, index, pixels: longint;
curbank: integer;
begin
inc(x1,StartXViewPort);
inc(x2,StartXViewPort);
{$ifdef logging}
LogLn('getscanline256 '+strf(x1)+' - '+strf(x2)+' at '+strf(y+StartYViewPort));
{$endif logging}
index := 0;
amount := x2-x1+1;
Offs:=(Longint(y)+StartYViewPort+YOffset)*bytesperline+x1;
Repeat
curbank := integer(offs shr 16);
SetReadBank(curbank);
{$ifdef logging}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging}
If ((amount >= 4) and
((offs and 3) = 0)) or
(amount >= 4+4-(offs and 3)) Then
{ allign target }
Begin
If (offs and 3) <> 0 then
{ this cannot go past a window boundary bacause the }
{ size of a window is always a multiple of 4 }
Begin
{$ifdef logging}
LogLn('Alligning by reading '+strf(4-(offs and 3))+' pixels');
{$endif logging}
for l := 1 to 4-(offs and 3) do
WordArray(Data)[index+l-1] :=
Mem[WinReadSeg:word(offs)+l-1];
inc(index, l);
inc(offs, l);
dec(amount, l);
End;
{$ifdef logging}
LogLn('Offset is now '+hexstr(offs,8)+', amount left: '+strf(amount));
{$endif logging}
{ offs is now 4-bytes alligned }
If amount <= ($10000-(Offs and $ffff)) Then
bankrest := amount
else {the rest won't fit anymore in the current window }
bankrest := $10000 - (Offs and $ffff);
{ it is possible that by aligning, we ended up in a new }
{ bank, so set the correct bank again to make sure }
setreadbank(offs shr 16);
{$ifdef logging}
LogLn('Rest to be read from this window: '+strf(bankrest));
{$endif logging}
For l := 0 to (Bankrest div 4)-1 Do
begin
pixels := MemL[WinWriteSeg:word(offs)+l*4];
WordArray(Data)[index+l*4] := pixels and $ff;
pixels := pixels shr 8;
WordArray(Data)[index+l*4+1] := pixels and $ff;
pixels := pixels shr 8;
WordArray(Data)[index+l*4+2] := pixels and $ff;
pixels := pixels shr 8;
WordArray(Data)[index+l*4+3] := pixels{ and $ff};
end;
inc(index,l*4+4);
inc(offs,l*4+4);
dec(amount,l*4+4);
{$ifdef logging}
LogLn('Offset is now '+hexstr(offs,8)+', amount left: '+strf(amount));
{$endif logging}
End
Else
Begin
{$ifdef logging}
LogLn('Leftover: '+strf(amount)+' at offset '+hexstr(offs,8));
{$endif logging}
For l := 0 to amount - 1 do
begin
{ this may cross a bank at any time, so adjust }
{ because this loop alwys runs for very little pixels, }
{ there's little gained by splitting it up }
setreadbank(offs shr 16);
WordArray(Data)[index+l] := mem[WinReadSeg:word(offs)];
inc(offs);
end;
amount := 0
End
Until amount = 0;
end;
procedure HLineVESA256(x,x2,y: integer); {$ifndef fpc}far;{$endif fpc}
var Offs: Longint;
mask, l, bankrest: longint;
curbank, hlength: integer;
Begin
{ must we swap the values? }
if x > x2 then
Begin
x := x xor x2;
x2 := x xor x2;
x:= x xor x2;
end;
{ First convert to global coordinates }
X := X + StartXViewPort;
X2 := X2 + StartXViewPort;
Y := Y + StartYViewPort;
if ClipPixels then
Begin
if LineClipped(x,y,x2,y,StartXViewPort,StartYViewPort,
StartXViewPort+ViewWidth, StartYViewPort+ViewHeight) then
exit;
end;
{$ifdef logging2}
LogLn('hline '+strf(x)+' - '+strf(x2)+' on '+strf(y)+' in mode '+strf(currentwritemode));
{$endif logging2}
HLength := x2 - x + 1;
{$ifdef logging2}
LogLn('length: '+strf(hlength));
{$endif logging2}
if HLength>0 then
begin
Offs:=(Longint(y)+YOffset)*bytesperline+x;
{$ifdef logging2}
LogLn('Offs: '+strf(offs)+' -- '+hexstr(offs,8));
{$endif logging2}
Mask := byte(CurrentColor)+byte(CurrentColor) shl 8;
Mask := Mask + Mask shl 16;
Case CurrentWriteMode of
AndPut:
Begin
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
SetReadBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging2}
If ((HLength >= 4) and
((offs and 3) = 0)) or
(HLength >= 4+4-(offs and 3)) Then
{ align target }
Begin
l := 0;
If (offs and 3) <> 0 then
{ this cannot go past a window boundary bacause the }
{ size of a window is always a multiple of 4 }
Begin
{$ifdef logging2}
LogLn('Alligning by drawing '+strf(4-(offs and 3))+' pixels');
{$endif logging2}
for l := 1 to 4-(offs and 3) do
Mem[WinWriteSeg:word(offs)+l-1] :=
Mem[WinReadSeg:word(offs)+l-1] And Byte(CurrentColor);
End;
Dec(HLength, l);
inc(offs, l);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
{ offs is now 4-bytes alligned }
If HLength <= ($10000-(Offs and $ffff)) Then
bankrest := HLength
else {the rest won't fit anymore in the current window }
bankrest := $10000 - (Offs and $ffff);
{ it is possible that by aligningm we ended up in a new }
{ bank, so set the correct bank again to make sure }
setwritebank(offs shr 16);
setreadbank(offs shr 16);
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging}
For l := 0 to (Bankrest div 4)-1 Do
MemL[WinWriteSeg:word(offs)+l*4] :=
MemL[WinReadSeg:word(offs)+l*4] And Mask;
inc(offs,l*4+4);
dec(hlength,l*4+4);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
End
Else
Begin
{$ifdef logging2}
LogLn('Drawing leftover: '+strf(HLength)+' at offset '+hexstr(offs,8));
{$endif logging}
For l := 0 to HLength - 1 do
begin
{ this may cross a bank at any time, so adjust }
{ becauese this loop alwys runs for very little pixels, }
{ there's little gained by splitting it up }
setreadbank(offs shr 16);
setwritebank(offs shr 16);
Mem[WinWriteSeg:word(offs)] :=
Mem[WinReadSeg:word(offs)] And byte(currentColor);
inc(offs);
end;
HLength := 0
End
Until HLength = 0;
End;
XorPut:
Begin
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
SetReadBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging}
If ((HLength >= 4) and
((offs and 3) = 0)) or
(HLength >= 4+4-(offs and 3)) Then
{ allign target }
Begin
l := 0;
If (offs and 3) <> 0 then
{ this cannot go past a window boundary bacause the }
{ size of a window is always a multiple of 4 }
Begin
{$ifdef logging2}
LogLn('Alligning by drawing '+strf(4-(offs and 3))+' pixels');
{$endif logging}
for l := 1 to 4-(offs and 3) do
Mem[WinWriteSeg:word(offs)+l-1] :=
Mem[WinReadSeg:word(offs)+l-1] Xor Byte(CurrentColor);
End;
Dec(HLength, l);
inc(offs, l);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
{ offs is now 4-bytes alligned }
If HLength <= ($10000-(Offs and $ffff)) Then
bankrest := HLength
else {the rest won't fit anymore in the current window }
bankrest := $10000 - (Offs and $ffff);
{ it is possible that by aligningm we ended up in a new }
{ bank, so set the correct bank again to make sure }
setwritebank(offs shr 16);
setreadbank(offs shr 16);
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging}
For l := 0 to (Bankrest div 4)-1 Do
MemL[WinWriteSeg:word(offs)+l*4] :=
MemL[WinReadSeg:word(offs)+l*4] Xor Mask;
inc(offs,l*4+4);
dec(hlength,l*4+4);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
End
Else
Begin
{$ifdef logging2}
LogLn('Drawing leftover: '+strf(HLength)+' at offset '+hexstr(offs,8));
{$endif logging}
For l := 0 to HLength - 1 do
begin
{ this may cross a bank at any time, so adjust }
{ because this loop alwys runs for very little pixels, }
{ there's little gained by splitting it up }
setreadbank(offs shr 16);
setwritebank(offs shr 16);
Mem[WinWriteSeg:word(offs)] :=
Mem[WinReadSeg:word(offs)] xor byte(currentColor);
inc(offs);
end;
HLength := 0
End
Until HLength = 0;
End;
OrPut:
Begin
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
SetReadBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging}
If ((HLength >= 4) and
((offs and 3) = 0)) or
(HLength >= 4+4-(offs and 3)) Then
{ allign target }
Begin
l := 0;
If (offs and 3) <> 0 then
{ this cannot go past a window boundary bacause the }
{ size of a window is always a multiple of 4 }
Begin
{$ifdef logging2}
LogLn('Alligning by drawing '+strf(4-(offs and 3))+' pixels');
{$endif logging}
for l := 1 to 4-(offs and 3) do
Mem[WinWriteSeg:word(offs)+l-1] :=
Mem[WinReadSeg:word(offs)+l-1] Or Byte(CurrentColor);
End;
Dec(HLength, l);
inc(offs, l);
{ it is possible that by aligningm we ended up in a new }
{ bank, so set the correct bank again to make sure }
setwritebank(offs shr 16);
setreadbank(offs shr 16);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
{ offs is now 4-bytes alligned }
If HLength <= ($10000-(Offs and $ffff)) Then
bankrest := HLength
else {the rest won't fit anymore in the current window }
bankrest := $10000 - (Offs and $ffff);
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging}
For l := 0 to (Bankrest div 4)-1 Do
MemL[WinWriteSeg:offs+l*4] :=
MemL[WinReadSeg:word(offs)+l*4] Or Mask;
inc(offs,l*4+4);
dec(hlength,l*4+4);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
End
Else
Begin
{$ifdef logging2}
LogLn('Drawing leftover: '+strf(HLength)+' at offset '+hexstr(offs,8));
{$endif logging}
For l := 0 to HLength - 1 do
begin
{ this may cross a bank at any time, so adjust }
{ because this loop alwys runs for very little pixels, }
{ there's little gained by splitting it up }
setreadbank(offs shr 16);
setwritebank(offs shr 16);
Mem[WinWriteSeg:word(offs)] :=
Mem[WinReadSeg:word(offs)] And byte(currentColor);
inc(offs);
end;
HLength := 0
End
Until HLength = 0;
End
Else
Begin
If CurrentWriteMode = NotPut Then
Mask := Not(Mask);
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8)+' -- '+strf(offs));
{$endif logging}
If ((HLength >= 4) and
((offs and 3) = 0)) or
(HLength >= 4+4-(offs and 3)) Then
{ allign target }
Begin
l := 0;
If (offs and 3) <> 0 then
{ this cannot go past a window boundary bacause the }
{ size of a window is always a multiple of 4 }
Begin
{$ifdef logging2}
LogLn('Alligning by drawing '+strf(4-(offs and 3))+' pixels');
{$endif logging}
for l := 1 to 4-(offs and 3) do
Mem[WinWriteSeg:word(offs)+l-1] := Byte(Mask);
End;
Dec(HLength, l);
inc(offs, l);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
{ offs is now 4-bytes alligned }
If HLength <= ($10000-(Offs and $ffff)) Then
bankrest := HLength
else {the rest won't fit anymore in the current window }
bankrest := $10000 - (Offs and $ffff);
{ it is possible that by aligningm we ended up in a new }
{ bank, so set the correct bank again to make sure }
setwritebank(offs shr 16);
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest)+' -- '+hexstr(bankrest,8));
{$endif logging}
For l := 0 to (Bankrest div 4)-1 Do
MemL[WinWriteSeg:word(offs)+l*4] := Mask;
inc(offs,l*4+4);
dec(hlength,l*4+4);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(hlength));
{$endif logging}
End
Else
Begin
{$ifdef logging2}
LogLn('Drawing leftover: '+strf(HLength)+' at offset '+hexstr(offs,8));
{$endif logging}
For l := 0 to HLength - 1 do
begin
{ this may cross a bank at any time, so adjust }
{ because this loop alwys runs for very little pixels, }
{ there's little gained by splitting it up }
setwritebank(offs shr 16);
Mem[WinWriteSeg:word(offs)] := byte(mask);
inc(offs);
end;
HLength := 0
End
Until HLength = 0;
End;
End;
end;
end;
procedure VLineVESA256(x,y,y2: integer); {$ifndef fpc}far;{$endif fpc}
var Offs: Longint;
l, bankrest: longint;
curbank, vlength: integer;
col: byte;
Begin
{ must we swap the values? }
if y > y2 then
Begin
y := y xor y2;
y2 := y xor y2;
y:= y xor y2;
end;
{ First convert to global coordinates }
X := X + StartXViewPort;
Y := Y + StartYViewPort;
Y2 := Y2 + StartYViewPort;
if ClipPixels then
Begin
if LineClipped(x,y,x,y2,StartXViewPort,StartYViewPort,
StartXViewPort+ViewWidth, StartYViewPort+ViewHeight) then
exit;
end;
Col := Byte(CurrentColor);
{$ifdef logging2}
LogLn('vline '+strf(y)+' - '+strf(y2)+' on '+strf(x)+' in mode '+strf(currentwritemode));
{$endif logging}
VLength := y2 - y + 1;
{$ifdef logging2}
LogLn('length: '+strf(vlength));
{$endif logging}
if VLength>0 then
begin
Offs:=(Longint(y)+YOffset)*bytesperline+x;
{$ifdef logging2}
LogLn('Offs: '+strf(offs)+' -- '+hexstr(offs,8));
{$endif logging}
Case CurrentWriteMode of
AndPut:
Begin
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
SetReadBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging}
If (VLength-1)*bytesperline <= ($10000-(Offs and $ffff)) Then
bankrest := VLength
else {the rest won't fit anymore in the current window }
bankrest := (($10000 - (Offs and $ffff)) div bytesperline)+1;
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging}
For l := 0 to Bankrest-1 Do
begin
Mem[WinWriteSeg:word(offs)] :=
Mem[WinReadSeg:word(offs)] And Col;
inc(offs,bytesperline);
end;
dec(VLength,l+1);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(vlength));
{$endif logging}
Until VLength = 0;
End;
XorPut:
Begin
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
SetReadBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging}
If (VLength-1)*bytesperline <= ($10000-(Offs and $ffff)) Then
bankrest := VLength
else {the rest won't fit anymore in the current window }
bankrest := (($10000 - (Offs and $ffff)) div bytesperline)+1;
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging}
For l := 0 to Bankrest-1 Do
begin
Mem[WinWriteSeg:word(offs)] :=
Mem[WinReadSeg:word(offs)] Xor Col;
inc(offs,bytesperline);
end;
dec(VLength,l+1);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(vlength));
{$endif logging}
Until VLength = 0;
End;
OrPut:
Begin
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
SetReadBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging}
If (VLength-1)*bytesperline <= ($10000-(Offs and $ffff)) Then
bankrest := VLength
else {the rest won't fit anymore in the current window }
bankrest := (($10000 - (Offs and $ffff)) div bytesperline)+1;
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging}
For l := 0 to Bankrest-1 Do
begin
Mem[WinWriteSeg:word(offs)] :=
Mem[WinReadSeg:word(offs)] Or Col;
inc(offs,bytesperline);
end;
dec(VLength,l+1);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(vlength));
{$endif logging}
Until VLength = 0;
End;
Else
Begin
If CurrentWriteMode = NotPut Then
Col := Not(Col);
Repeat
curbank := integer(offs shr 16);
SetWriteBank(curbank);
{$ifdef logging2}
LogLn('set bank '+strf(curbank)+' for offset '+hexstr(offs,8));
{$endif logging}
If (VLength-1)*bytesperline <= ($10000-(Offs and $ffff)) Then
bankrest := VLength
else {the rest won't fit anymore in the current window }
bankrest := (($10000 - (Offs and $ffff)) div bytesperline)+1;
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging}
For l := 0 to Bankrest-1 Do
begin
Mem[WinWriteSeg:word(offs)] := Col;
inc(offs,bytesperline);
end;
dec(VLength,l+1);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(vlength));
{$endif logging}
Until VLength = 0;
End;
End;
end;
end;
procedure PatternLineVESA256(x1,x2,y: smallint); {$ifndef fpc}far;{$endif fpc}
{********************************************************}
{ Draws a horizontal patterned line according to the }
{ current Fill Settings. }
{********************************************************}
{ Important notes: }
{ - CurrentColor must be set correctly before entering }
{ this routine. }
{********************************************************}
type
TVESA256Fill = Record
case byte of
0: (data1, data2: longint);
1: (pat: array[0..7] of byte);
end;
var
fill: TVESA256Fill;
bankrest, l : longint;
offs, amount: longint;
i : smallint;
j : smallint;
OldWriteMode : word;
TmpFillPattern, patternPos : byte;
begin
{ convert to global coordinates ... }
x1 := x1 + StartXViewPort;
x2 := x2 + StartXViewPort;
y := y + StartYViewPort;
{ if line was fully clipped then exit...}
if LineClipped(x1,y,x2,y,StartXViewPort,StartYViewPort,
StartXViewPort+ViewWidth, StartYViewPort+ViewHeight) then
exit;
OldWriteMode := CurrentWriteMode;
CurrentWriteMode := NormalPut;
{ Get the current pattern }
TmpFillPattern := FillPatternTable
[FillSettings.Pattern][((y + startYViewPort) and $7)+1];
{$ifdef logging2}
LogLn('patternline '+strf(x1)+' - '+strf(x2)+' on '+strf(y));
{$endif logging2}
{ how long is the line }
amount := x2 - x1 + 1;
{ offset to start at }
offs := (longint(y)+yoffset)*bytesperline+x1;
{ convert the pattern data into the actual color sequence }
j := 1;
FillChar(fill,sizeOf(fill),byte(currentBkColor));
for i := 0 to 7 do
begin
if TmpFillPattern and j <> 0 then
fill.pat[7-i] := currentColor;
{$ifopt q+}
{$q-}
{$define overflowOn}
{$endif}
j := j shl 1;
{$ifdef overflowOn}
{$q+}
{$undef overflowOn}
{$endif}
end;
Repeat
SetWriteBank(integer(offs shr 16));
If (amount > 7) and
(((offs and 7) = 0) or
(amount > 7+8-(offs and 7))) Then
Begin
{ align target }
l := 0;
If (offs and 7) <> 0 then
{ this cannot go past a window boundary bacause the }
{ size of a window is always a multiple of 8 }
Begin
{ position in the pattern where to start }
patternPos := offs and 7;
{$ifdef logging2}
LogLn('Aligning by drawing '+strf(8-(offs and 7))+' pixels');
{$endif logging2}
for l := 1 to 8-(offs and 7) do
begin
Mem[WinWriteSeg:word(offs)+l-1] := fill.pat[patternPos and 7];
inc(patternPos)
end;
End;
Dec(amount, l);
inc(offs, l);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(amount));
{$endif logging2}
{ offs is now 8-bytes alligned }
If amount <= ($10000-(Offs and $ffff)) Then
bankrest := amount
else {the rest won't fit anymore in the current window }
bankrest := $10000 - (Offs and $ffff);
{ it is possible that by aligningm we ended up in a new }
{ bank, so set the correct bank again to make sure }
setwritebank(offs shr 16);
{$ifdef logging2}
LogLn('Rest to be drawn in this window: '+strf(bankrest));
{$endif logging2}
for l := 0 to (bankrest div 8)-1 Do
begin
MemL[WinWriteSeg:word(offs)+l*8] := fill.data1;
MemL[WinWriteSeg:word(offs)+l*8+4] := fill.data2;
end;
inc(offs,l*8+8);
dec(amount,l*8+8);
{$ifdef logging2}
LogLn('Offset is now '+hexstr(offs,8)+', length left: '+strf(amount));
{$endif logging2}
End
Else
Begin
{$ifdef logging2}
LogLn('Drawing leftover: '+strf(amount)+' at offset '+hexstr(offs,8));
{$endif logging2}
patternPos := offs and 7;
For l := 0 to amount - 1 do
begin
{ this may cross a bank at any time, so adjust }
{ because this loop alwys runs for very little pixels, }
{ there's little gained by splitting it up }
setwritebank(offs shr 16);
Mem[WinWriteSeg:word(offs)] := fill.pat[patternPos and 7];
inc(offs);
inc(patternPos);
end;
amount := 0;
End
Until amount = 0;
currentWriteMode := oldWriteMode;
end;
{************************************************************************}
{* 256 colors VESA mode routines Linear mode *}
{************************************************************************}
{$ifdef FPC}
type
pbyte = ^byte;
pword = ^word;
procedure DirectPutPixVESA256Linear(x, y : integer); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
col : byte;
begin
offs := longint(y) * BytesPerLine + x;
Case CurrentWriteMode of
XorPut:
Begin
if UseNoSelector then
col:=pbyte(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@col),1);
col := col xor byte(CurrentColor);
End;
AndPut:
Begin
if UseNoSelector then
col:=pbyte(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@col),1);
col := col and byte(CurrentColor);
End;
OrPut:
Begin
if UseNoSelector then
col:=pbyte(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@col),1);
col := col or byte(CurrentColor);
End
else
Begin
If CurrentWriteMode <> NotPut then
col := Byte(CurrentColor)
else col := Not(Byte(CurrentColor));
End
End;
if UseNoSelector then
pbyte(LFBPointer+offs+LinearPageOfs)^:=col
else
seg_move(get_ds,longint(@col),WinWriteSeg,offs+LinearPageOfs,1);
end;
procedure PutPixVESA256Linear(x, y : integer; color : word); {$ifndef fpc}far;{$endif fpc}
var
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;
{$ifdef logging}
logln('putpix offset: '+hexstr(offs,8)+', color: '+strf(color)+', lpo: $'+
hexstr(LinearPageOfs,8));
{$endif logging}
if UseNoSelector then
pbyte(LFBPointer+offs+LinearPageOfs)^:=byte(color)
else
seg_move(get_ds,longint(@color),WinWriteSeg,offs+LinearPageOfs,1);
end;
function GetPixVESA256Linear(x, y : integer): word; {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
col : byte;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
offs := longint(y) * BytesPerLine + x;
{$ifdef logging}
logln('getpix offset: '+hexstr(offs,8)+', lpo: $'+
hexstr(LinearPageOfs,8));
{$endif logging}
if UseNoSelector then
col:=pbyte(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@col),1);
GetPixVESA256Linear:=col;
end;
(*
function SetVESADisplayStart(PageNum : word;x,y : integer):Boolean;
var
dregs : registers;
begin
if PageNum>VesaModeInfo.NumberOfPages then
PageNum:=0;
{$ifdef DEBUG}
if PageNum>0 then
writeln(stderr,'Setting Display Page ',PageNum);
{$endif DEBUG}
dregs.RealEBX:=0{ $80 for Wait for retrace };
dregs.RealECX:=x;
dregs.RealEDX:=y+PageNum*maxy;
dregs.RealSP:=0;
dregs.RealSS:=0;
dregs.RealEAX:=$4F07; RealIntr($10,dregs);
{ idem as above !!! }
if (dregs.RealEAX and $1FF) <> $4F then
begin
{$ifdef DEBUG}
writeln(stderr,'Set Display start error');
{$endif DEBUG}
SetVESADisplayStart:=false;
end
else
SetVESADisplayStart:=true;
end;
*)
{$endif FPC}
{************************************************************************}
{* 15/16bit pixels VESA mode routines *}
{************************************************************************}
procedure PutPixVESA32kOr64k(x, y : integer; color : word); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
begin
{$ifdef logging}
logln('putpixvesa32kor64k('+strf(x)+','+strf(y)+')');
{$endif logging}
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;
Y := Y + YOffset; { adjust pixel for correct virtual page }
offs := longint(y) * BytesPerLine + 2*x;
SetWriteBank(integer(offs shr 16));
{$ifdef logging}
logln('putpixvesa32kor64k offset: '+strf(word(offs)));
{$endif logging}
memW[WinWriteSeg : word(offs)] := color;
end;
function GetPixVESA32kOr64k(x, y : integer): word; {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort + YOffset;
offs := longint(y) * BytesPerLine + 2*x;
SetReadBank(integer(offs shr 16));
GetPixVESA32kOr64k:=memW[WinReadSeg : word(offs)];
end;
procedure DirectPutPixVESA32kOr64k(x, y : integer); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
col : word;
begin
{$ifdef logging}
logln('directputpixvesa32kor64k('+strf(x)+','+strf(y)+')');
{$endif logging}
y:= Y + YOffset;
offs := longint(y) * BytesPerLine + 2*x;
SetWriteBank(integer((offs shr 16) and $ff));
Case CurrentWriteMode of
XorPut:
Begin
SetReadBank(integer(offs shr 16));
memW[WinWriteSeg : word(offs)] := memW[WinReadSeg : word(offs)] xor currentcolor;
End;
AndPut:
Begin
SetReadBank(integer(offs shr 16));
memW[WinWriteSeg : word(offs)] := memW[WinReadSeg : word(offs)] And currentcolor;
End;
OrPut:
Begin
SetReadBank(integer(offs shr 16));
memW[WinWriteSeg : word(offs)] := memW[WinReadSeg : word(offs)] or currentcolor;
End
else
Begin
If CurrentWriteMode <> NotPut Then
col := CurrentColor
Else col := Not(CurrentColor);
{$ifdef logging}
logln('directputpixvesa32kor64k offset: '+strf(word(offs)));
{$endif logging}
memW[WinWriteSeg : word(offs)] := Col;
End
End;
end;
{$ifdef FPC}
{************************************************************************}
{* 15/16bit pixels VESA mode routines Linear mode *}
{************************************************************************}
procedure PutPixVESA32kor64kLinear(x, y : integer; color : word); {$ifndef fpc}far;{$endif fpc}
var
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;
if UseNoSelector then
pword(LFBPointer+offs+LinearPageOfs)^:=color
else
seg_move(get_ds,longint(@color),WinWriteSeg,offs+LinearPageOfs,2);
end;
function GetPixVESA32kor64kLinear(x, y : integer): word; {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
color : word;
begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
offs := longint(y) * BytesPerLine + 2*x;
if UseNoSelector then
color:=pword(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@color),2);
GetPixVESA32kor64kLinear:=color;
end;
procedure DirectPutPixVESA32kor64kLinear(x, y : integer); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
col : word;
begin
offs := longint(y) * BytesPerLine + 2*x;
Case CurrentWriteMode of
XorPut:
Begin
if UseNoSelector then
col:=pword(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@col),2);
col := col xor currentcolor;
End;
AndPut:
Begin
if UseNoSelector then
col:=pword(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@col),2);
col := col and currentcolor;
End;
OrPut:
Begin
if UseNoSelector then
col:=pword(LFBPointer+offs+LinearPageOfs)^
else
seg_move(WinWriteSeg,offs+LinearPageOfs,get_ds,longint(@col),2);
col := col or currentcolor;
End
else
Begin
If CurrentWriteMode <> NotPut Then
col := CurrentColor
Else col := Not(CurrentColor);
End
End;
if UseNoSelector then
pword(LFBPointer+offs+LinearPageOfs)^:=col
else
seg_move(get_ds,longint(@col),WinWriteSeg,offs+LinearPageOfs,2);
end;
{$endif FPC}
{************************************************************************}
{* 4-bit pixels VESA mode routines *}
{************************************************************************}
procedure PutPixVESA16(x, y : integer; color : word); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
dummy : 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;
Y := Y + YOffset; { adjust pixel for correct virtual page }
{ }
offs := longint(y) * BytesPerLine + (x div 8);
SetWriteBank(integer(offs shr 16));
PortW[$3ce] := $0f01; { Index 01 : Enable ops on all 4 planes }
PortW[$3ce] := color shl 8; { Index 00 : Enable correct plane and write color }
Port[$3ce] := 8; { Index 08 : Bitmask register. }
Port[$3cf] := $80 shr (x and $7); { Select correct bits to modify }
dummy := Mem[WinWriteSeg: offs]; { Latch the data into host space. }
Mem[WinWriteSeg: offs] := dummy; { Write the data into video memory }
PortW[$3ce] := $ff08; { Enable all bit planes. }
PortW[$3ce] := $0001; { Index 01 : Disable ops on all four planes. }
{ }
end;
Function GetPixVESA16(X,Y: Integer):word; {$ifndef fpc}far;{$endif fpc}
Var dummy, offset: Word;
shift: byte;
Begin
X:= X + StartXViewPort;
Y:= Y + StartYViewPort + YOffset;
offset := longint(Y) * BytesPerLine + (x div 8);
SetReadBank(integer(offset shr 16));
Port[$3ce] := 4;
shift := 7 - (X and 7);
Port[$3cf] := 0;
dummy := (Mem[WinReadSeg:offset] shr shift) and 1;
Port[$3cf] := 1;
dummy := dummy or (((Mem[WinReadSeg:offset] shr shift) and 1) shl 1);
Port[$3cf] := 2;
dummy := dummy or (((Mem[WinReadSeg:offset] shr shift) and 1) shl 2);
Port[$3cf] := 3;
dummy := dummy or (((Mem[WinReadSeg:offset] shr shift) and 1) shl 3);
GetPixVESA16 := dummy;
end;
procedure DirectPutPixVESA16(x, y : integer); {$ifndef fpc}far;{$endif fpc}
var
offs : longint;
dummy : byte;
Color : word;
begin
y:= Y + YOffset;
case CurrentWriteMode of
XORPut:
begin
{ getpixel wants local/relative coordinates }
Color := GetPixVESA16(x-StartXViewPort,y-StartYViewPort);
Color := CurrentColor Xor Color;
end;
OrPut:
begin
{ getpixel wants local/relative coordinates }
Color := GetPixVESA16(x-StartXViewPort,y-StartYViewPort);
Color := CurrentColor Or Color;
end;
AndPut:
begin
{ getpixel wants local/relative coordinates }
Color := GetPixVESA16(x-StartXViewPort,y-StartYViewPort);
Color := CurrentColor And Color;
end;
NotPut:
begin
Color := Not Color;
end
else
Color := CurrentColor;
end;
offs := longint(y) * BytesPerLine + (x div 8);
SetWriteBank(integer(offs shr 16));
PortW[$3ce] := $0f01; { Index 01 : Enable ops on all 4 planes }
PortW[$3ce] := color shl 8; { Index 00 : Enable correct plane and write color }
Port[$3ce] := 8; { Index 08 : Bitmask register. }
Port[$3cf] := $80 shr (x and $7); { Select correct bits to modify }
dummy := Mem[WinWriteSeg: offs]; { Latch the data into host space. }
Mem[WinWriteSeg: offs] := dummy; { Write the data into video memory }
PortW[$3ce] := $ff08; { Enable all bit planes. }
PortW[$3ce] := $0001; { Index 01 : Disable ops on all four planes. }
end;
{************************************************************************}
{* VESA Palette entries *}
{************************************************************************}
{$IFDEF DPMI}
{$ifdef fpc}
Procedure SetVESARGBAllPalette(const Palette:PaletteType);
var
pal: array[0..255] of palrec;
regs: TDPMIRegisters;
c, Ptr: longint;
RealSeg: word;
FunctionNr : byte; { use blankbit or normal RAMDAC programming? }
begin
if DirectColor then
Begin
_GraphResult := grError;
exit;
end;
{ 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;
fillChar(pal,sizeof(pal),0);
{ Convert to vesa format }
for c := 0 to 255 do
begin
pal[c].red := byte(palette.colors[c].red);
pal[c].green := byte(palette.colors[c].green);
pal[c].blue := byte(palette.colors[c].blue);
end;
{ Alllocate real mode buffer }
Ptr:=Global_Dos_Alloc(sizeof(pal));
{get the segment value}
RealSeg := word(Ptr shr 16);
{ setup interrupt registers }
FillChar(regs, sizeof(regs), #0);
{ copy palette values to real mode buffer }
DosMemPut(RealSeg,0,pal,sizeof(pal));
regs.eax := $4F09;
regs.ebx := FunctionNr;
regs.ecx := 256;
regs.edx := 0;
regs.es := RealSeg;
regs.edi := 0; { offset is always zero }
RealIntr($10, regs);
{ free real mode memory }
If not Global_Dos_Free(word(Ptr and $ffff)) then
RunError(216);
if word(regs.eax) <> $004F then
begin
_GraphResult := grError;
exit;
end;
end
else
{ assume it's fully VGA compatible palette-wise. }
Begin
SetVGARGBAllPalette(palette);
end;
setallpalettedefault(palette);
end;
{$endif fpc}
Procedure SetVESARGBPalette(ColorNum, RedValue, GreenValue,
BlueValue : Integer);
var
pal: palrec;
regs: TDPMIRegisters;
Ptr: longint;
{$ifndef fpc}
PalPtr : ^PalRec;
{$endif fpc}
RealSeg: word;
FunctionNr : byte; { use blankbit or normal RAMDAC programming? }
begin
if DirectColor then
Begin
{$ifdef logging}
logln('setvesargbpalette called with directcolor = true');
{$endif logging}
_GraphResult := grError;
exit;
end;
pal.align := 0;
pal.red := byte(RedValue) shr 2;
pal.green := byte(GreenValue) shr 2;
pal.blue := byte(BlueValue) shr 2;
{ 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(regs), #0);
{ copy palette values to real mode buffer }
{$ifndef fpc}
move(pal, palptr^, sizeof(pal));
{$else fpc}
DosMemPut(RealSeg,0,pal,sizeof(pal));
{$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}
If not Global_Dos_Free(word(Ptr and $ffff)) then
RunError(216);
{$endif fpc}
if word(regs.eax) <> $004F then
begin
{$ifdef logging}
logln('setvesargbpalette failed while directcolor = false!');
{$endif logging}
_GraphResult := grError;
exit;
end;
end
else
{ assume it's fully VGA compatible palette-wise. }
Begin
SetVGARGBPalette(ColorNum, RedValue, GreenValue, BlueValue);
end;
end;
Procedure GetVESARGBPalette(ColorNum: integer; Var
RedValue, GreenValue, BlueValue : integer);
var
pal: PalRec;
{$ifndef fpc}
palptr : ^PalRec;
{$endif fpc}
regs : TDPMIRegisters;
RealSeg: word;
ptr: longint;
begin
if DirectColor then
Begin
{$ifdef logging}
logln('getvesargbpalette called with directcolor = true');
{$endif logging}
_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(regs), #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(pal));
{$else fpc}
DosMemGet(RealSeg,0,Pal,sizeof(pal));
{$endif fpc}
{ free real mode memory }
{$ifndef fpc}
GlobalDosFree(word(Ptr and $ffff));
{$else fpc}
If not Global_Dos_Free(word(Ptr and $ffff)) then
RunError(216);
{$endif fpc}
if word(regs.eax) <> $004F then
begin
{$ifdef logging}
logln('getvesargbpalette failed while directcolor = false!');
{$endif logging}
_GraphResult := grError;
exit;
end
else
begin
RedValue := Integer(pal.Red);
GreenValue := Integer(pal.Green);
BlueValue := Integer(pal.Blue);
end;
end
else
GetVGARGBPalette(ColorNum, RedValue, GreenValue, BlueValue);
end;
{$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}
type
heaperrorproc=function(size:longint):integer;
Const
HeapErrorIsHooked : boolean = false;
OldHeapError : HeapErrorProc = nil;
DsLimit : dword = 0;
function NewHeapError(size : longint) : integer;
begin
set_segment_limit(get_ds,DsLimit);
NewHeapError:=OldHeapError(size);
DsLimit:=get_segment_limit(get_ds);
{ The base of ds can be changed
we need to compute the address again PM }
LFBPointer:=pointer(FrameBufferLinearAddress-get_segment_base_address(get_ds));
if dword(LFBPointer)+dword(VESAInfo.TotalMem shl 16)-1 > DsLimit then
set_segment_limit(get_ds,dword(LFBPointer)+dword(VESAInfo.TotalMem shl 16)-1);
end;
procedure HookHeapError;
begin
if HeapErrorIsHooked then
exit;
DsLimit:=get_segment_limit(get_ds);
OldHeapError:=HeapErrorProc(HeapError);
HeapError:=@NewHeapError;
HeapErrorIsHooked:=true;
end;
procedure UnHookHeapError;
begin
if not HeapErrorIsHooked then
exit;
LFBPointer:=nil;
set_segment_limit(get_ds,DsLimit);
HeapError:=OldHeapError;
HeapErrorIsHooked:=false;
end;
function SetupLinear(var ModeInfo: TVESAModeInfo;mode : word) : boolean;
begin
SetUpLinear:=false;
{$ifdef FPC}
case mode of
m320x200x32k,
m320x200x64k,
m640x480x32k,
m640x480x64k,
m800x600x32k,
m800x600x64k,
m1024x768x32k,
m1024x768x64k,
m1280x1024x32k,
m1280x1024x64k :
begin
DirectPutPixel:=@DirectPutPixVESA32kor64kLinear;
PutPixel:=@PutPixVESA32kor64kLinear;
GetPixel:=@GetPixVESA32kor64kLinear;
{ linear mode for lines not yet implemented PM }
HLine:=@HLineDefault;
VLine:=@VLineDefault;
GetScanLine := @GetScanLineDefault;
PatternLine := @PatternLineDefault;
end;
m640x400x256,
m640x480x256,
m800x600x256,
m1024x768x256,
m1280x1024x256:
begin
DirectPutPixel:=@DirectPutPixVESA256Linear;
PutPixel:=@PutPixVESA256Linear;
GetPixel:=@GetPixVESA256Linear;
{ linear mode for lines not yet implemented PM }
HLine:=@HLineDefault;
VLine:=@VLineDefault;
GetScanLine := @GetScanLineDefault;
PatternLine := @PatternLineDefault;
end;
else
exit;
end;
FrameBufferLinearAddress:=Get_linear_addr(VESAModeInfo.PhysAddress and $FFFF0000,
VESAInfo.TotalMem shl 16);
{$ifdef logging}
logln('framebuffer linear address: '+hexstr(FrameBufferLinearAddress div (1024*1024),8));
logln('total mem shl 16: '+strf(vesainfo.totalmem shl 16));
{$endif logging}
if int31error<>0 then
begin
{$ifdef logging}
logln('Unable to get linear address for '+hexstr(VESAModeInfo.PhysAddress,8));
{$endif logging}
writeln(stderr,'Unable to get linear address for ',hexstr(VESAModeInfo.PhysAddress,8));
exit;
end;
if UseNoSelector then
begin
HookHeapError;
LFBPointer:=pointer(FrameBufferLinearAddress-get_segment_base_address(get_ds));
if dword(LFBPointer)+dword(VESAInfo.TotalMem shl 16)-1 > dword(get_segment_limit(get_ds)) then
set_segment_limit(get_ds,dword(LFBPointer)+dword(VESAInfo.TotalMem shl 16)-1);
end
else
begin
WinWriteSeg:=allocate_ldt_descriptors(1);
{$ifdef logging}
logln('writeseg1: '+hexstr(winwriteseg,8));
{$endif logging}
set_segment_base_address(WinWriteSeg,FrameBufferLinearAddress);
set_segment_limit(WinWriteSeg,(VESAInfo.TotalMem shl 16)-1);
lock_linear_region(FrameBufferLinearAddress,(VESAInfo.TotalMem shl 16));
if int31error<>0 then
begin
{$ifdef logging}
logln('Error in linear memory selectors creation');
{$endif logging}
writeln(stderr,'Error in linear memory selectors creation');
exit;
end;
end;
LinearPageOfs := 0;
InLinear:=true;
SetUpLinear:=true;
{ WinSize:=(VGAInfo.TotalMem shl 16);
WinLoMask:=(VGAInfo.TotalMem shl 16)-1;
WinShift:=15;
Temp:=VGAInfo.TotalMem;
while Temp>0 do
begin
inc(WinShift);
Temp:=Temp shr 1;
end; }
{$endif FPC}
end;
procedure SetupWindows(var ModeInfo: TVESAModeInfo);
begin
InLinear:=false;
{ 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;
YOffset := 0;
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 = $B800 then
WinWriteSeg := SegB800
else
begin
WriteLn('Invalid segment address.');
Halt(255);
end;
end;
function setVESAMode(mode:word):boolean;
var i:word;
res: boolean;
begin
{ Init mode information, for compatibility with VBE < 1.1 }
FillChar(VESAModeInfo, sizeof(TVESAModeInfo), #0);
{ get the video mode information }
if getVESAModeInfo(VESAmodeinfo, mode) then
begin
{ checks if the hardware supports the video mode. }
if (VESAModeInfo.attr and modeAvail) = 0 then
begin
SetVESAmode := FALSE;
{$ifdef logging}
logln(' vesa mode '+strf(mode)+' not supported!!!');
{$endif logging}
_GraphResult := grError;
exit;
end;
SetVESAMode := TRUE;
BankShift := 0;
while (64 shr BankShift) <> VESAModeInfo.WinGranularity do
Inc(BankShift);
CurrentWriteBank := -1;
CurrentReadBank := -1;
BytesPerLine := VESAModeInfo.BytesPerScanLine;
{ These are the window adresses ... }
WinWriteSeg := 0; { This is the segment to use for writes }
WinReadSeg := 0; { This is the segment to use for reads }
ReadWindow := 0;
WriteWindow := 0;
{ VBE 2.0 and higher supports >= non VGA linear buffer types...}
{ this is backward compatible. }
if (((VESAModeInfo.Attr and ModeNoWindowed) <> 0) or UseLFB) and
((VESAModeInfo.Attr and ModeLinearBuffer) <> 0) then
begin
if not SetupLinear(VESAModeInfo,mode) then
SetUpWindows(VESAModeInfo);
end
else
{ if linear and windowed is supported, then use windowed }
{ method. }
SetUpWindows(VESAModeInfo);
{$ifdef logging}
LogLn('Entering vesa mode '+strf(mode));
LogLn('Read segment: $'+hexstr(winreadseg,4));
LogLn('Write segment: $'+hexstr(winwriteseg,4));
LogLn('Window granularity: '+strf(VESAModeInfo.WinGranularity)+'kb');
LogLn('Window size: '+strf(VESAModeInfo.winSize)+'kb');
LogLn('Bytes per line: '+strf(bytesperline));
{$endif logging}
{ Select the correct mode number if we're going to use linear access! }
if InLinear then
inc(mode,$4000);
asm
mov ax,4F02h
mov bx,mode
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
sub ax,004Fh
cmp ax,1
sbb al,al
mov res,al
end;
if not res then
_GraphResult := GrNotDetected
else _GraphResult := grOk;
end;
end;
(*
function getVESAMode:word;assembler;
asm {return -1 if error}
mov ax,4F03h
{$ifdef fpc}
push ebp
{$endif fpc}
int 10h
{$ifdef fpc}
pop ebp
{$endif fpc}
cmp ax,004Fh
je @@OK
mov ax,-1
jmp @@X
@@OK:
mov ax,bx
@@X:
end;
*)
{************************************************************************}
{* VESA Modes inits *}
{************************************************************************}
{$IFDEF DPMI}
{******************************************************** }
{ Function GetMaxScanLines() }
{-------------------------------------------------------- }
{ This routine returns the maximum number of scan lines }
{ possible for this mode. This is done using the Get }
{ Scan Line length VBE function. }
{******************************************************** }
function GetMaxScanLines: word;
var
regs : TDPMIRegisters;
begin
FillChar(regs, sizeof(regs), #0);
{ play it safe, call the real mode int, the 32-bit entry point }
{ may not be defined as stated in VBE v3.0 }
regs.eax := $4f06; {_ setup function }
regs.ebx := $0001; { get scan line length }
RealIntr($10, regs);
GetMaxScanLines := (regs.edx and $0000ffff);
end;
{$ELSE}
function GetMaxScanLines: word; assembler;
asm
mov ax, 4f06h
mov bx, 0001h
int 10h
mov ax, dx
end;
{$ENDIF}
procedure Init1280x1024x64k; {$ifndef fpc}far;{$endif fpc}
begin
SetVesaMode(m1280x1024x64k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init1280x1024x32k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m1280x1024x32k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init1280x1024x256; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m1280x1024x256);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init1280x1024x16; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m1280x1024x16);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init1024x768x64k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m1024x768x64k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init640x480x32k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m640x480x32k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init1024x768x256; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m1024x768x256);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init1024x768x16; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m1024x768x16);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init800x600x64k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m800x600x64k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init800x600x32k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m800x600x32k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init800x600x256; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m800x600x256);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init800x600x16; {$ifndef fpc}far;{$endif fpc}
begin
SetVesaMode(m800x600x16);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init640x480x64k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m640x480x64k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init640x480x256; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m640x480x256);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init640x400x256; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m640x400x256);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init320x200x64k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m320x200x64k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
procedure Init320x200x32k; {$ifndef fpc}far;{$endif fpc}
begin
SetVESAMode(m320x200x32k);
{ Get maximum number of scanlines for page flipping }
ScanLines := GetMaxScanLines;
end;
{$IFDEF DPMI}
Procedure SaveStateVESA; {$ifndef fpc}far;{$endif fpc}
var
PtrLong: longint;
regs: TDPMIRegisters;
begin
SaveSupported := FALSE;
SavePtr := nil;
{$ifdef logging}
LogLn('Get the video mode...');
{$endif logging}
{ 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;
{ saving/restoring video state screws up Windows (JM) }
if inWindows then
exit;
{$ifdef logging}
LogLn('Prepare to save VESA video state');
{$endif logging}
{ 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;
regs.eax := $4f04;
regs.edx := $0000;
regs.ecx := $000F;
RealIntr($10, regs);
StateSize := word(regs.ebx);
if byte(regs.eax) = $4f then
SaveSupported := TRUE;
if SaveSupported then
begin
{$ifdef logging}
LogLn('allocating VESA save buffer of '+strf(64*StateSize));
{$endif logging}
{$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($10,regs);
end;
end;
procedure RestoreStateVESA; {$ifndef fpc}far;{$endif fpc}
var
regs:TDPMIRegisters;
begin
{ go back to the old video mode...}
asm
mov ah,00
mov al,[VideoMode]
{$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;
{$ELSE}
{**************************************************************}
{* Real mode routines *}
{**************************************************************}
Procedure SaveStateVESA; far;
begin
SavePtr := nil;
SaveSupported := FALSE;
{ Get the video mode }
asm
mov ah,0fh
int 10h
mov [VideoMode], al
end;
{ Prepare to save video state...}
asm
mov ax, 4f04h { get buffer size to save state }
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
mov dx, 00h
int 10h
mov [StateSize], bx
cmp al,04fh
jnz @notok
mov [SaveSupported],TRUE
@notok:
end;
if SaveSupported then
Begin
GetMem(SavePtr, 64*StateSize); { values returned in 64-byte blocks }
if not assigned(SavePtr) then
RunError(203);
asm
mov ax, 4F04h { save the state buffer }
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
mov dx, 01h
mov es, WORD PTR [SavePtr+2]
mov bx, WORD PTR [SavePtr]
int 10h
end;
{ restore state, according to Ralph Brown Interrupt list }
{ some BIOS corrupt the hardware after a save... }
asm
mov ax, 4F04h { save the state buffer }
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
mov dx, 02h
mov es, WORD PTR [SavePtr+2]
mov bx, WORD PTR [SavePtr]
int 10h
end;
end;
end;
procedure RestoreStateVESA; far;
begin
{ go back to the old video mode...}
asm
mov ah,00
mov al,[VideoMode]
int 10h
end;
{ then restore all state information }
if assigned(SavePtr) and (SaveSupported=TRUE) then
begin
{ restore state, according to Ralph Brown Interrupt list }
asm
mov ax, 4F04h { save the state buffer }
mov cx, 00001111b { Save DAC / Data areas / Hardware states }
mov dx, 02h { restore state }
mov es, WORD PTR [SavePtr+2]
mov bx, WORD PTR [SavePtr]
int 10h
end;
FreeMem(SavePtr, 64*StateSize);
SavePtr := nil;
end;
end;
{$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() }
{-------------------------------------------------------- }
{ This routine changes the page which will be displayed }
{ on the screen, since the method has changed somewhat }
{ between VBE versions , we will use the old method where }
{ the new pixel offset is used to display different pages }
{******************************************************** }
procedure SetVisualVESA(page: word); {$ifndef fpc}far;{$endif fpc}
var
newStartVisible : word;
begin
if page > HardwarePages then
begin
_graphresult := grError;
exit;
end;
newStartVisible := (MaxY+1)*page;
if newStartVisible > ScanLines then
begin
_graphresult := grError;
exit;
end;
asm
mov ax, 4f07h
mov bx, 0000h { set display start }
mov cx, 0000h { pixel zero ! }
mov dx, [NewStartVisible] { new scanline }
{$ifdef fpc}
push ebp
{$endif}
int 10h
{$ifdef fpc}
pop ebp
{$endif}
end;
end;
procedure SetActiveVESA(page: word); {$ifndef fpc}far;{$endif fpc}
begin
{ video offset is in pixels under VESA VBE! }
{ This value is reset after a mode set to page ZERO = YOffset = 0 ) }
if page > HardwarePages then
begin
_graphresult := grError;
exit;
end;
YOffset := (MaxY+1)*page;
LinearPageOfs := YOffset*(MaxX+1);
end;
{
$Log: vesa.inc,v $
Revision 1.9 2002/09/07 16:01:19 peter
* old logs removed and tabs fixed
}
syntax highlighted by Code2HTML, v. 0.9.1