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{
This file is part of the PTCPas framebuffer library
Copyright (C) 2001-2012 Nikolay Nikolov (nickysn@users.sourceforge.net)
Original C++ version by Christian Nentwich (c.nentwich@cs.ucl.ac.uk)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version
with the following modification:
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules,and
to copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the terms
and conditions of the license of that module. An independent module is a
module which is not derived from or based on this library. If you modify
this library, you may extend this exception to your version of the library,
but you are not obligated to do so. If you do not wish to do so, delete this
exception statement from your version.
This library 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. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
}
{$IFDEF ENABLE_X11_EXTENSION_XF86DGA1}
constructor TX11DGA1Display.Create(ADisplay: PDisplay; AScreen: Integer; const AFlags: TX11Flags);
var
dummy1, dummy2: Integer;
begin
inherited;
LOG('trying to create a DGA 1.0 display');
FInDirect := False;
FInMode := False;
FModeInfo := nil;
{ Check if we are root }
if fpgeteuid <> 0 then
raise TPTCError.Create('Have to be root to switch to DGA mode');
{ Check if the DGA extension and VidMode extension can be used }
if not XF86DGAQueryExtension(FDisplay, @dummy1, @dummy2) then
raise TPTCError.Create('DGA extension not available');
if not XF86VidModeQueryExtension(FDisplay, @dummy1, @dummy2) then
raise TPTCError.Create('VidMode extension not available');
end;
destructor TX11DGA1Display.Destroy;
begin
Close;
inherited Destroy;
end;
procedure TX11DGA1Display.Open(ATitle: string; AWidth, AHeight: Integer; AFormat: IPTCFormat; const AOpenGLAttributes: IPTCOpenGLAttributes);
var
vml: PXF86VidModeModeLine;
dotclock: Integer;
i: Integer;
root: TWindow;
e: TXEvent;
found: Boolean;
r, g, b: Single;
found_mode: Integer;
min_diff: Integer;
d_x, d_y: Integer;
begin
FWidth := AWidth;
FHeight := AHeight;
{ Get all availabe video modes }
XF86VidModeGetAllModeLines(FDisplay, FScreen, @FModeInfoNum, @FModeInfo);
FPreviousMode := -1;
{ Save previous mode }
New(vml);
try
XF86VidModeGetModeLine(FDisplay, FScreen, @dotclock, vml);
try
for i := 0 to FModeInfoNum - 1 do
begin
if (vml^.hdisplay = FModeInfo[i]^.hdisplay) and
(vml^.vdisplay = FModeInfo[i]^.vdisplay) then
begin
FPreviousMode := i;
Break;
end;
end;
finally
if vml^.privsize <> 0 then
XFree(vml^.c_private);
end;
finally
Dispose(vml);
end;
if FPreviousMode = -1 then
raise TPTCError.Create('Current mode not found in modelist?! Err, this shouldn''t happen :)');
{ Find a video mode to set }
{ Normal modesetting first, find exactly matching mode }
found_mode := -1;
for i := 0 to FModeInfoNum - 1 do
if (FModeInfo[i]^.hdisplay = AWidth) and (FModeInfo[i]^.vdisplay = AHeight) then
begin
found_mode := i;
Break;
end;
{ try to find a mode that matches the width first }
if found_mode = -1 then
for i := 0 to FModeInfoNum - 1 do
if (FModeInfo[i]^.hdisplay = AWidth) and
(FModeInfo[i]^.vdisplay >= AHeight) then
begin
found_mode := i;
Break;
end;
{ Next try to match the height }
if found_mode = -1 then
for i := 0 to FModeInfoNum - 1 do
if (FModeInfo[i]^.hdisplay >= AWidth) and
(FModeInfo[i]^.vdisplay = AHeight) then
begin
found_mode := i;
Break;
end;
if found_mode = -1 then
begin
{ Finally, find the mode that is bigger than the requested one and makes }
{ the least difference }
min_diff := 987654321;
for i := 0 to FModeInfoNum - 1 do
if (FModeInfo[i]^.hdisplay >= AWidth) and (FModeInfo[i]^.vdisplay >= AHeight) then
begin
d_x := Sqr(FModeInfo[i]^.hdisplay - AWidth);
d_y := Sqr(FModeInfo[i]^.vdisplay - AHeight);
if (d_x + d_y) < min_diff then
begin
min_diff := d_x + d_y;
found_mode := i;
end;
end;
end;
if found_mode = -1 then
raise TPTCError.Create('Cannot find a video mode to use');
if not XF86VidModeSwitchToMode(FDisplay, FScreen, FModeInfo[found_mode]) then
raise TPTCError.Create('Error switching to requested video mode');
FDestX := (FModeInfo[found_mode]^.hdisplay div 2) - (AWidth div 2);
FDestY := (FModeInfo[found_mode]^.vdisplay div 2) - (AHeight div 2);
XFlush(FDisplay);
FInMode := True;
{ Check if the requested colour mode is available }
FFormat := GetX11Format(AFormat);
{ Grab exclusive control over the keyboard and mouse }
root := XRootWindow(FDisplay, FScreen);
XGrabKeyboard(FDisplay, root, True, GrabModeAsync, GrabModeAsync, CurrentTime);
XGrabPointer(FDisplay, root, True, PointerMotionMask or ButtonPressMask or
ButtonReleaseMask, GrabModeAsync, GrabModeAsync, None, None,
CurrentTime);
XFlush(FDisplay);
{ Get Display information }
XF86DGAGetVideo(FDisplay, FScreen, @FDGAAddr, @FDGALineWidth,
@FDGABankSize, @FDGAMemSize);
{ Don't have to be root anymore }
{ fpsetuid(fpgetuid);...}
XF86DGAGetViewPortSize(FDisplay, FScreen, @FDGAWidth, @FDGAHeight);
if XF86DGAForkApp(FScreen) <> 0 then
raise TPTCError.Create('cannot do safety fork');
if XF86DGADirectVideo(FDisplay, FScreen, XF86DGADirectGraphics or
XF86DGADirectKeyb or XF86DGADirectMouse) = 0 then
raise TPTCError.Create('cannot switch to DGA mode');
FInDirect := True;
FillChar(FDGAAddr^, FDGALineWidth * FDGAHeight * (FFormat.Bits div 8), 0);
XSelectInput(FDisplay, DefaultRootWindow(FDisplay),
KeyPressMask or KeyReleaseMask);
XF86DGASetViewPort(FDisplay, FScreen, 0, 0); { Important.. sort of =) }
found := False;
repeat
{ Stupid loop. The key }
{ events were causing }
{ problems.. }
found := XCheckMaskEvent(FDisplay, KeyPressMask or KeyReleaseMask, @e);
until not found;
{ Create colour map in 8 bit mode }
if FFormat.Bits = 8 then
begin
FColours := GetMem(256 * SizeOf(TXColor));
if FColours = nil then
raise TPTCError.Create('Cannot allocate colour map cells');
FCMap := XCreateColormap(FDisplay, RootWindow(FDisplay, FScreen),
DefaultVisual(FDisplay, FScreen), AllocAll);
if FCMap = 0 then
raise TPTCError.Create('Cannot create colour map');
end
else
FCMap := 0;
{ Set 332 palette, for now }
if (FFormat.Bits = 8) and FFormat.Direct then
begin
{Taken from PTC 0.72, i hope it's fine}
for i := 0 to 255 do
begin
r := ((i and $E0) shr 5) * 255 / 7;
g := ((i and $1C) shr 2) * 255 / 7;
b := (i and $03) * 255 / 3;
FColours[i].pixel := i;
FColours[i].red := Round(r) shl 8;
FColours[i].green := Round(g) shl 8;
FColours[i].blue := Round(b) shl 8;
Byte(FColours[i].flags) := DoRed or DoGreen or DoBlue;
end;
XStoreColors(FDisplay, FCMap, FColours, 256);
XF86DGAInstallColormap(FDisplay, FScreen, FCMap);
end;
{ Set clipping area }
FClip := TPTCArea.Create(0, 0, FWidth, FHeight);
FOpen := True;
end;
{ not in DGA mode }
procedure TX11DGA1Display.Open(AWindow: TWindow; AFormat: IPTCFormat);
begin
if AWindow = 0 Then; { Prevent warnings }
if AFormat = nil Then;
end;
procedure TX11DGA1Display.Open(AWindow: TWindow; AFormat: IPTCFormat; AX, AY, AWidth, AHeight: Integer);
begin
if (AWindow = 0) or
(AFormat = Nil) or
(AX = 0) or
(AY = 0) or
(AWidth = 0) or
(AHeight = 0) Then;
end;
procedure TX11DGA1Display.Close;
begin
FOpen := False;
if FInDirect then
begin
FInDirect := False;
XF86DGADirectVideo(FDisplay, FScreen, 0);
end;
if FInMode then
begin
FInMode := False;
XF86VidModeSwitchToMode(FDisplay, FScreen, FModeInfo[FPreviousMode]);
XUngrabKeyboard(FDisplay, CurrentTime);
XUngrabPointer(FDisplay, CurrentTime);
end;
if FDisplay <> nil then
XFlush(FDisplay);
if FCMap <> 0 then
begin
XFreeColormap(FDisplay, FCMap);
FCMap := 0;
end;
FreeMemAndNil(FColours);
if FModeInfo <> nil then
begin
XFree(FModeInfo);
FModeInfo := nil;
end;
end;
procedure TX11DGA1Display.GetModes(var AModes: TPTCModeList);
begin
SetLength(AModes, 0);
{todo...}
end;
procedure TX11DGA1Display.Update;
begin
end;
procedure TX11DGA1Display.Update(AArea: IPTCArea);
begin
end;
procedure TX11DGA1Display.HandleEvents;
var
e: TXEvent;
NewFocus: Boolean;
NewFocusSpecified: Boolean;
function UsefulEventsPending: Boolean;
var
tmpEvent: TXEvent;
begin
if XCheckTypedEvent(FDisplay, ClientMessage, @tmpEvent) then
begin
Result := True;
XPutBackEvent(FDisplay, @tmpEvent);
exit;
end;
if XCheckMaskEvent(FDisplay, FocusChangeMask or
KeyPressMask or KeyReleaseMask or
ButtonPressMask or ButtonReleaseMask or
PointerMotionMask or ExposureMask, @tmpEvent) then
begin
Result := True;
XPutBackEvent(FDisplay, @tmpEvent);
exit;
end;
Result := False;
end;
begin
NewFocusSpecified := False;
while UsefulEventsPending do
begin
XNextEvent(FDisplay, @e);
case e._type of
FocusIn: begin
NewFocus := True;
NewFocusSpecified := True;
end;
FocusOut: begin
NewFocus := False;
NewFocusSpecified := True;
end;
ClientMessage: begin
{ if (e.xclient.format = 32) and (TAtom(e.xclient.data.l[0]) = m_atom_close) then
Halt(0);}
end;
Expose: begin
{...}
end;
KeyPress, KeyRelease: HandleKeyEvent(e.xkey);
ButtonPress, ButtonRelease: begin
{...}
end;
MotionNotify: begin
{...}
end;
end;
end;
// HandleChangeFocus(NewFocus);
end;
function TX11DGA1Display.NextEvent(out AEvent: IPTCEvent; AWait: Boolean; const AEventMask: TPTCEventMask): Boolean;
var
tmpEvent: TXEvent;
begin
repeat
{ process all events from the X queue and put them on our FEventQueue }
HandleEvents;
{ try to find an event that matches the EventMask }
AEvent := FEventQueue.NextEvent(AEventMask);
if AWait and (AEvent = Nil) then
begin
{ if the X event queue is empty, block until an event is received }
XPeekEvent(FDisplay, @tmpEvent);
end;
until (not AWait) or (AEvent <> Nil);
Result := AEvent <> nil;
end;
function TX11DGA1Display.PeekEvent(AWait: Boolean; const AEventMask: TPTCEventMask): IPTCEvent;
var
tmpEvent: TXEvent;
begin
repeat
{ process all events from the X queue and put them on our FEventQueue }
HandleEvents;
{ try to find an event that matches the EventMask }
Result := FEventQueue.PeekEvent(AEventMask);
if AWait and (Result = Nil) then
begin
{ if the X event queue is empty, block until an event is received }
XPeekEvent(FDisplay, @tmpEvent);
end;
until (not AWait) or (Result <> Nil);
end;
function TX11DGA1Display.Lock: Pointer;
begin
Result := FDGAAddr + FDGALineWidth * FDestY * (FFormat.Bits div 8) +
FDestX * (FFormat.Bits div 8);
end;
procedure TX11DGA1Display.Unlock;
begin
end;
procedure TX11DGA1Display.Palette(APalette: IPTCPalette);
var
pal: PUint32;
i: Integer;
begin
pal := APalette.data;
if not FFormat.Indexed then
exit;
for i := 0 to 255 do
begin
FColours[i].pixel := i;
FColours[i].red := ((pal[i] shr 16) and $FF) shl 8;
FColours[i].green := ((pal[i] shr 8) and $FF) shl 8;
FColours[i].blue := (pal[i] and $FF) shl 8;
Byte(FColours[i].flags) := DoRed or DoGreen or DoBlue;
end;
XStoreColors(FDisplay, FCMap, FColours, 256);
XF86DGAInstallColormap(FDisplay, FScreen, FCMap);
end;
function TX11DGA1Display.GetPitch: Integer;
begin
Result := FDGALineWidth * (FFormat.Bits div 8);
end;
function TX11DGA1Display.GetX11Window: TWindow;
begin
Result := DefaultRootWindow(FDisplay);
end;
function TX11DGA1Display.IsFullScreen: Boolean;
begin
{ DGA is always fullscreen }
Result := True;
end;
function TX11DGA1Display.IsOpen: Boolean;
begin
Result := FOpen;
end;
procedure TX11DGA1Display.SetCursor(AVisible: Boolean);
begin
{nothing... raise exception if visible=true?}
end;
procedure TX11DGA1Display.SetMouseGrab(AGrabMouse: Boolean);
begin
{...}
end;
{$ENDIF ENABLE_X11_EXTENSION_XF86DGA1}
|