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+ RestoreCRTMode

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* GetModeRange returned one mode too much
  + Some cleanup
This commit is contained in:
carl 1999-04-24 18:56:13 +00:00
parent 1a45ac6847
commit aa8128e317
1 changed files with 182 additions and 0 deletions
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182
rtl/inc/graph/modes.inc
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@ -13,6 +13,9 @@
**********************************************************************}
{-----------------------------------------------------------------------}
{ Internal routines }
{-----------------------------------------------------------------------}
procedure addmode(mode: TModeInfo);
{********************************************************}
@ -103,4 +106,183 @@
end;
end;
{-----------------------------------------------------------------------}
{ External routines }
{-----------------------------------------------------------------------}
function GetModeName(ModeNumber: integer): string;
{********************************************************}
{ Function GetModeName() }
{--------------------------------------------------------}
{ Checks the known video list, and returns ModeName }
{ string. On error returns an empty string. }
{********************************************************}
var
mode: PModeInfo;
begin
mode:=nil;
GetModeName:='';
{ only search in the current driver modes ... }
mode:=SearchMode(IntCurrentDriver,ModeNumber);
if assigned(mode) then
GetModeName:=Mode^.ModeName
else
_GraphResult := grInvalidMode;
end;
function GetGraphMode: Integer;
begin
GetGraphMode := IntCurrentMode;
end;
function GetMaxMode: word;
{ I know , i know, this routine is very slow, and it would }
{ be much easier to sort the linked list of possible modes }
{ instead of doing this, but I'm lazy!! And anyways, the }
{ speed of the routine here is not that important.... }
var
i: word;
mode: PModeInfo;
begin
mode:=nil;
i:=0;
repeat
inc(i);
{ mode 0 always exists... }
{ start search at 1.. }
mode:=SearchMode(IntCurrentDriver,i);
until not assigned(mode);
GetMaxMode:=i;
end;
procedure GetModeRange(GraphDriver: Integer; var LoMode,
HiMode: Integer);
var
i : integer;
mode : PModeInfo;
begin
LoMode:=-1;
HiMode:=-1;
mode := nil;
{ First search if the graphics driver is supported .. }
{ since mode zero is always supported.. if that driver }
{ is supported it should return something... }
mode := SearchMode(GraphDriver, 0);
{ driver not supported...}
if not assigned(mode) then exit;
{ now it exists... find highest available mode... }
LoMode := 0;
mode:=nil;
i:=-1;
repeat
inc(i);
{ start search at 0.. }
mode:=SearchMode(GraphDriver,i);
until not assigned(mode);
HiMode := i-1;
end;
procedure SetGraphMode(mode: Integer);
var
modeinfo: PModeInfo;
begin
{ check if the mode exists... }
modeinfo := searchmode(IntcurrentDriver,mode);
if not assigned(modeinfo) then
begin
_GraphResult := grInvalidMode;
exit;
end;
{ reset all hooks...}
DefaultHooks;
{ arccall not reset - tested against VGA BGI driver }
{ Setup all hooks if none, keep old defaults...}
{ required hooks - returns error if no hooks to these }
{ routines. }
if assigned(modeinfo^.DirectPutPixel) then
DirectPutPixel := modeinfo^.DirectPutPixel
else
begin
_Graphresult := grInvalidMode;
exit;
end;
if assigned(modeinfo^.PutPixel) then
PutPixel := modeinfo^.PutPixel
else
begin
_Graphresult := grInvalidMode;
exit;
end;
if assigned(modeinfo^.GetPixel) then
GetPixel := modeinfo^.GetPixel
else
begin
_Graphresult := grInvalidMode;
exit;
end;
{ optional hooks. }
if assigned(modeinfo^.ClearViewPort) then
ClearViewPort := modeinfo^.ClearViewPort;
if assigned(modeinfo^.PutImage) then
PutImage := modeinfo^.PutImage;
if assigned(modeinfo^.GetImage) then
GetImage := modeinfo^.GetImage;
if assigned(modeinfo^.ImageSize) then
ImageSize := modeinfo^.ImageSize;
if assigned(modeinfo^.GetScanLine) then
GetScanLine := modeinfo^.GetScanLine;
if assigned(modeinfo^.Line) then
Line := modeinfo^.Line;
if assigned(modeinfo^.InternalEllipse) then
InternalEllipse := modeinfo^.InternalEllipse;
if assigned(modeinfo^.PatternLine) then
PatternLine := modeinfo^.PatternLine;
if assigned(modeinfo^.HLine) then
Hline := modeinfo^.Hline;
if assigned(modeinfo^.Vline) then
VLine := modeinfo^.VLine;
IntCurrentMode := modeinfo^.ModeNumber;
IntCurrentDriver := modeinfo^.DriverNumber;
XAspect := modeinfo^.XAspect;
YAspect := modeinfo^.YAspect;
MaxX := modeinfo^.MaxX;
MaxY := modeinfo^.MaxY;
MaxColor := modeinfo^.MaxColor;
{ now actually initialize the video mode...}
{ check first if the routine exists }
if not assigned(modeinfo^.InitMode) then
begin
_GraphResult := grInvalidMode;
exit;
end;
modeinfo^.InitMode;
{ It is very important that this call be made }
{ AFTER the other variables have been setup. }
{ Since it calls some routines which rely on }
{ those variables. }
GraphDefaults;
SetViewPort(0,0,MaxX,MaxY,TRUE);
end;
procedure RestoreCrtMode;
{********************************************************}
{ Procedure RestoreCRTMode() }
{--------------------------------------------------------}
{ Returns to the video mode which was set before the }
{ InitGraph. Hardware state is set to the old values. }
{--------------------------------------------------------}
{ NOTE: - }
{ - }
{********************************************************}
begin
RestoreVideoState;
end;