diff options
Diffstat (limited to 'src/corelib/x11')
-rw-r--r-- | src/corelib/x11/gfx_x11.pas | 50 |
1 files changed, 46 insertions, 4 deletions
diff --git a/src/corelib/x11/gfx_x11.pas b/src/corelib/x11/gfx_x11.pas index 7fea5804..e505ed1f 100644 --- a/src/corelib/x11/gfx_x11.pas +++ b/src/corelib/x11/gfx_x11.pas @@ -132,6 +132,8 @@ type end; + { TfpgCanvasImpl } + TfpgCanvasImpl = class(TfpgCanvasBase) private FDrawing: boolean; @@ -147,6 +149,8 @@ type FClipRegion: TRegion; FPixHeight, FPixWidth: Integer; + FBufferFreeTimer: TObject; + procedure BufferFreeTimer(Sender: TObject); procedure TryFreePixmap; protected procedure DoSetFontRes(fntres: TfpgFontResourceBase); override; @@ -1688,6 +1692,7 @@ destructor TfpgCanvasImpl.Destroy; begin if FDrawing then DoEndDraw; + FreeAndNil(FBufferFreeTimer); TryFreePixmap; inherited Destroy; end; @@ -1730,13 +1735,41 @@ begin if buffered then begin - if (FastDoubleBuffer = False) or (FBufferPixmap = 0) or (w <> FPixWidth) or (h <> FPixHeight) then + if (FBufferPixmap = 0) + or (FastDoubleBuffer = False) + or (FastDoubleBuffer and (w > FPixWidth) or (h > FPixHeight)) + or ((FastDoubleBuffer = False) and ((w <> FPixWidth) or (h <> FPixHeight))) + then begin + if FastDoubleBuffer and ((w > FPixWidth) or (h > FPixHeight)) then + begin + FPixHeight := h + 30; + FPixWidth := w + 30; + end + else begin + FPixHeight := h; + FPixWidth := w; + end; TryFreePixmap; - FBufferPixmap := XCreatePixmap(xapplication.display, FDrawWindow.FWinHandle, w, h, xapplication.DisplayDepth); + FBufferPixmap := XCreatePixmap(xapplication.display, FDrawWindow.FWinHandle, FPixWidth, FPixHeight, xapplication.DisplayDepth); + end; + if FastDoubleBuffer then + begin + // Rapid paint events reuse the double buffer which resests a delay + // After the delay the double buffer is freed, letting the OS use video + // memory if needed. + // Things like scrolling and resizing are fast + + // Reset the timers next trigger + if FBufferFreeTimer = nil then + begin + FBufferFreeTimer := TfpgTimer.Create(500); + TfpgTimer(FBufferFreeTimer).OnTimer := @BufferFreeTimer; + end + else + TfpgTimer(FBufferFreeTimer).Enabled := False; + TfpgTimer(FBufferFreeTimer).Enabled := True; end; - FPixHeight := h; - FPixWidth := w; FDrawHandle := FBufferPixmap; end else @@ -1836,6 +1869,15 @@ begin Trunc(64 * a1), Trunc(64 * a2)); end; +procedure TfpgCanvasImpl.BufferFreeTimer(Sender: TObject); +begin + {$IFDEF DEBUG} + WriteLn('fpGFX/X11: Freeing Buffer w=', FPixWidth, ' h=', FPixHeight); + {$ENDIF} + TryFreePixmap; + FreeAndNil(FBufferFreeTimer); +end; + procedure TfpgCanvasImpl.TryFreePixmap; begin if FBufferPixmap > 0 then |