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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
}
constructor TX11Modes.Create(ADisplay: PDisplay; AScreen: cint);
begin
FDisplay := ADisplay;
FScreen := AScreen;
end;
constructor TX11ModesNoModeSwitching.Create(ADisplay: PDisplay; AScreen: cint);
begin
inherited;
FWidth := DisplayWidth(FDisplay, FScreen);
FHeight := DisplayHeight(FDisplay, FScreen);
end;
procedure TX11ModesNoModeSwitching.GetModes(var AModes: TPTCModeList; ACurrentDesktopFormat: IPTCFormat);
begin
SetLength(AModes, 1);
AModes[0] := TPTCMode.Create(FWidth,
FHeight,
ACurrentDesktopFormat);
end;
procedure TX11ModesNoModeSwitching.SetBestMode(AWidth, AHeight: Integer);
begin
FWidth := DisplayWidth(FDisplay, FScreen);
FHeight := DisplayHeight(FDisplay, FScreen);
end;
procedure TX11ModesNoModeSwitching.RestorePreviousMode;
begin
{ do nothing }
end;
function TX11ModesNoModeSwitching.GetWidth: Integer;
begin
Result := FWidth;
end;
function TX11ModesNoModeSwitching.GetHeight: Integer;
begin
Result := FHeight;
end;
{$IFDEF ENABLE_X11_EXTENSION_XRANDR}
constructor TX11ModesXrandr.Create(ADisplay: PDisplay; AScreen: cint);
var
dummy1, dummy2: cint;
Major, Minor: cint;
begin
inherited;
FInMode := False;
if not XRRQueryExtension(FDisplay, @dummy1, @dummy2) then
raise TPTCError.Create('Xrandr extension not available');
XRRQueryVersion(FDisplay, @Major, @Minor); // todo: check
LOG('Xrandr version: ' + IntToStr(Major) + '.' + IntToStr(Minor));
FRoot := RootWindow(FDisplay, FScreen);
{ is this necessary? }
CreateScreenConfig;
DestroyScreenConfig;
end;
destructor TX11ModesXrandr.Destroy;
begin
RestorePreviousMode;
inherited;
end;
procedure TX11ModesXrandr.CreateScreenConfig;
begin
DestroyScreenConfig;
FXRRConfig := XRRGetScreenInfo(FDisplay, FRoot);
if FXRRConfig = nil then
raise TPTCError.Create('XRRGetScreenInfo failed');
end;
procedure TX11ModesXrandr.DestroyScreenConfig;
var
tmp: PXRRScreenConfiguration;
begin
if FXRRConfig <> nil then
begin
tmp := FXRRConfig;
FXRRConfig := nil;
XRRFreeScreenConfigInfo(tmp);
end;
end;
procedure TX11ModesXrandr.GetModes(var AModes: TPTCModeList; ACurrentDesktopFormat: IPTCFormat);
var
ScreenSizes: PXRRScreenSize;
ScreenSizesNum: cint;
I: Integer;
begin
ScreenSizes := XRRConfigSizes(FXRRConfig, @ScreenSizesNum);
SetLength(AModes, ScreenSizesNum);
for I := 0 to ScreenSizesNum - 1 do
AModes[I] := TPTCMode.Create(ScreenSizes[I].width,
ScreenSizes[I].height,
ACurrentDesktopFormat);
end;
class function TX11ModesXrandr.FindBestMode(AScreenSizes: PXRRScreenSize;
AScreenSizesNum: Integer;
ARequestedWidth,
ARequestedHeight: Integer): Integer;
var
I: Integer;
min_diff: Integer;
d_x, d_y: Integer;
found_mode: Integer;
begin
{ Find exact match }
for I := 0 to AScreenSizesNum - 1 do
if (AScreenSizes[I].width = ARequestedWidth) and
(AScreenSizes[I].height = ARequestedHeight) then
exit(I);
{ try to find a mode that matches the width first }
for I := 0 to AScreenSizesNum - 1 do
if (AScreenSizes[I].width = ARequestedWidth) and
(AScreenSizes[I].height >= ARequestedHeight) then
exit(I);
{ Next try to match the height }
for I := 0 to AScreenSizesNum - 1 do
if (AScreenSizes[I].width >= ARequestedWidth) and
(AScreenSizes[I].height = ARequestedHeight) then
exit(I);
{ Finally, find the mode that is bigger than the requested one and makes }
{ the least difference }
found_mode := -1;
min_diff := High(Integer);
for I := 0 to AScreenSizesNum - 1 do
if (AScreenSizes[I].width >= ARequestedWidth) and
(AScreenSizes[I].height >= ARequestedHeight) then
begin
d_x := Sqr(AScreenSizes[I].width - ARequestedWidth);
d_y := Sqr(AScreenSizes[I].height - ARequestedHeight);
if (d_x + d_y) < min_diff then
begin
min_diff := d_x + d_y;
found_mode := I;
end;
end;
if found_mode <> -1 then
exit(found_mode);
raise TPTCError.Create('Cannot find matching video mode');
end;
procedure TX11ModesXrandr.SetBestMode(AWidth, AHeight: Integer);
var
ScreenSizes: PXRRScreenSize;
ScreenSizesNum: cint;
BestMode: Integer;
CurrentRotation: TRotation;
begin
CreateScreenConfig;
try
if not FInMode then
SaveCurrentMode;
ScreenSizes := XRRConfigSizes(FXRRConfig, @ScreenSizesNum);
BestMode := FindBestMode(ScreenSizes, ScreenSizesNum, AWidth, AHeight);
FWidth := ScreenSizes[BestMode].width;
FHeight := ScreenSizes[BestMode].height;
XRRConfigCurrentConfiguration(FXRRConfig, @CurrentRotation);
X11CheckSuccess(XRRSetScreenConfig(FDisplay, FXRRConfig, FRoot, BestMode,
CurrentRotation, CurrentTime),
'XRRSetScreenConfig failed');
FInMode := True;
finally
DestroyScreenConfig;
end;
end;
procedure TX11ModesXrandr.SaveCurrentMode;
var
SizeIndex: TSizeID;
ScreenSizes: PXRRScreenSize;
ScreenSizesNum: cint;
begin
LOG('xrandr: saving previous mode');
SizeIndex := XRRConfigCurrentConfiguration(FXRRConfig, @FSavedMode.Rotation);
FSavedMode.Rate := XRRConfigCurrentRate(FXRRConfig);
ScreenSizes := XRRConfigSizes(FXRRConfig, @ScreenSizesNum);
if (SizeIndex < 0) or (SizeIndex >= ScreenSizesNum) then
raise TPTCError.Create('XRRConfigCurrentConfiguration returned a size index outside the range of screen sizes');
FSavedMode.ScreenSize := ScreenSizes[SizeIndex];
end;
procedure TX11ModesXrandr.RestorePreviousMode;
var
I: Integer;
SizeIndex: cint;
ScreenSizes: PXRRScreenSize;
ScreenSizesNum: cint;
begin
if not FInMode then
exit;
LOG('xrandr: restoring previous mode');
CreateScreenConfig;
try
SizeIndex := -1;
ScreenSizes := XRRConfigSizes(FXRRConfig, @ScreenSizesNum);
for I := 0 to ScreenSizesNum - 1 do
if (ScreenSizes[I].width = FSavedMode.ScreenSize.width ) and
(ScreenSizes[I].height = FSavedMode.ScreenSize.height ) and
(ScreenSizes[I].mwidth = FSavedMode.ScreenSize.mwidth ) and
(ScreenSizes[I].mheight = FSavedMode.ScreenSize.mheight) then
begin
SizeIndex := I;
Break;
end;
if SizeIndex = -1 then
for I := 0 to ScreenSizesNum - 1 do
if (ScreenSizes[I].width = FSavedMode.ScreenSize.width ) and
(ScreenSizes[I].height = FSavedMode.ScreenSize.height) then
begin
SizeIndex := I;
Break;
end;
if SizeIndex = -1 then
raise TPTCError.Create('xrandr: saved mode size not found in size list');
X11CheckSuccess(XRRSetScreenConfigAndRate(FDisplay,
FXRRConfig,
FRoot,
SizeIndex,
FSavedMode.Rotation,
FSavedMode.Rate,
CurrentTime),
'XRRSetScreenConfigAndRate failed');
FInMode := False;
finally
DestroyScreenConfig;
end;
end;
function TX11ModesXrandr.GetWidth: Integer;
begin
Result := FWidth;
end;
function TX11ModesXrandr.GetHeight: Integer;
begin
Result := FHeight;
end;
{$ENDIF ENABLE_X11_EXTENSION_XRANDR}
{$IFDEF ENABLE_X11_EXTENSION_XF86VIDMODE}
constructor TX11ModesXF86VidMode.Create(ADisplay: PDisplay; AScreen: Integer);
var
dummy1, dummy2: cint;
begin
inherited;
FSavedMode := nil;
FSavedDotClock := 0;
FModeList := nil;
FModeListCount := 0;
if not XF86VidModeQueryExtension(FDisplay, @dummy1, @dummy2) then
raise TPTCError.Create('VidMode extension not available');
end;
destructor TX11ModesXF86VidMode.Destroy;
begin
if FSavedMode <> nil then
begin
RestorePreviousMode;
if FSavedMode^.privsize <> 0 then
XFree(FSavedMode^.c_private);
Dispose(FSavedMode);
end;
if FModeList <> nil then
XFree(FModeList);
inherited Destroy;
end;
{todo: move the saving of the previous mode to a separate function...}
procedure TX11ModesXF86VidMode.RetrieveModeList;
begin
{ if we have been called before, do nothing }
if FModeList <> nil then
exit;
{ Save previous mode }
New(FSavedMode);
FillChar(FSavedMode^, SizeOf(FSavedMode^), 0);
XF86VidModeGetModeLine(FDisplay, FScreen, @FSavedDotClock, FSavedMode);
{ Get all available video modes }
XF86VidModeGetAllModeLines(FDisplay, FScreen, @FModeListCount, @FModeList);
end;
procedure TX11ModesXF86VidMode.GetModes(var AModes: TPTCModeList; ACurrentDesktopFormat: IPTCFormat);
var
I: Integer;
begin
RetrieveModeList;
SetLength(AModes, FModeListCount);
for I := 0 to FModeListCount - 1 do
AModes[I] := TPTCMode.Create(FModeList[I]^.hdisplay, FModeList[I]^.vdisplay, ACurrentDesktopFormat);
end;
function TX11ModesXF86VidMode.FindNumberOfBestMode(AWidth, AHeight: Integer): Integer;
var
min_diff: Integer;
d_x, d_y: Integer;
found_mode: Integer;
I: Integer;
begin
{ try an exact match }
for I := 0 to FModeListCount - 1 do
if (FModeList[I]^.hdisplay = AWidth) and (FModeList[I]^.vdisplay = AHeight) then
exit(I);
{ try to find a mode that matches the width first }
for I := 0 to FModeListCount - 1 do
if (FModeList[I]^.hdisplay = AWidth) and (FModeList[I]^.vdisplay >= AHeight) then
exit(I);
{ Next try to match the height }
for I := 0 to FModeListCount - 1 do
if (FModeList[I]^.hdisplay >= AWidth) and (FModeList[I]^.vdisplay = AHeight) then
exit(I);
{ Finally, find the mode that is bigger than the requested one and makes }
{ the least difference }
found_mode := -1;
min_diff := High(Integer);
for I := 0 to FModeListCount - 1 do
if (FModeList[I]^.hdisplay >= AWidth) and (FModeList[I]^.vdisplay >= AHeight) then
begin
d_x := Sqr(FModeList[I]^.hdisplay - AWidth);
d_y := Sqr(FModeList[I]^.vdisplay - AHeight);
if (d_x + d_y) < min_diff then
begin
min_diff := d_x + d_y;
found_mode := I;
end;
end;
if found_mode <> -1 then
Result := found_mode
else
raise TPTCError.Create('Cannot find matching video mode');
end;
procedure TX11ModesXF86VidMode.SetBestMode(AWidth, AHeight: Integer);
var
BestMode: Integer;
begin
RetrieveModeList;
BestMode := FindNumberOfBestMode(AWidth, AHeight);
if not XF86VidModeSwitchToMode(FDisplay, FScreen, FModeList[BestMode]) then
raise TPTCError.Create('Error switching to the requested video mode');
FWidth := FModeList[BestMode]^.hdisplay;
FHeight := FModeList[BestMode]^.vdisplay;
XWarpPointer(FDisplay, None, RootWindow(FDisplay, FScreen), 0, 0, 0, 0,
FWidth div 2,
FHeight div 2);
if not XF86VidModeSetViewPort(FDisplay, FScreen, 0, 0) then
raise TPTCError.Create('Error moving the viewport to the upper-left corner');
end;
procedure TX11ModesXF86VidMode.RestorePreviousMode;
var
ModeInfo: TXF86VidModeModeInfo;
begin
if FSavedMode <> nil then
begin
{FSavedMode is a TXF86VidModeModeLine, but XF86VidModeSwitchToMode wants a
TXF86VidModeModeInfo :}
FillChar(ModeInfo, SizeOf(ModeInfo), 0);
ModeInfo.dotclock := FSavedDotClock;
ModeInfo.hdisplay := FSavedMode^.hdisplay;
ModeInfo.hsyncstart := FSavedMode^.hsyncstart;
ModeInfo.hsyncend := FSavedMode^.hsyncend;
ModeInfo.htotal := FSavedMode^.htotal;
ModeInfo.vdisplay := FSavedMode^.vdisplay;
ModeInfo.vsyncstart := FSavedMode^.vsyncstart;
ModeInfo.vsyncend := FSavedMode^.vsyncend;
ModeInfo.vtotal := FSavedMode^.vtotal;
ModeInfo.flags := FSavedMode^.flags;
ModeInfo.privsize := FSavedMode^.privsize;
ModeInfo.c_private := FSavedMode^.c_private;
XF86VidModeSwitchToMode(FDisplay, FScreen, @ModeInfo);
end;
end;
function TX11ModesXF86VidMode.GetWidth: Integer;
begin
Result := FWidth;
end;
function TX11ModesXF86VidMode.GetHeight: Integer;
begin
Result := FHeight;
end;
{$ENDIF ENABLE_X11_EXTENSION_XF86VIDMODE}
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