mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-11-04 14:49:34 +01:00
319 lines
9.6 KiB
ObjectPascal
319 lines
9.6 KiB
ObjectPascal
{
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*****************************************************************************
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* *
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* See the file COPYING.modifiedLGPL.txt, included in this distribution, *
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* for details about the copyright. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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*****************************************************************************
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Author: Mattias Gaertner
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ToDo: MultiSampling, AuxBuffers
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}
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unit GLCarbonAGLContext;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, LCLProc, LCLType, gl, Forms,
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MacOSAll,
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AGL, CarbonProc, CarbonDef, CarbonPrivate,
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WSLCLClasses, CarbonUtils,
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Controls;
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procedure LOpenGLViewport(Left, Top, Width, Height: integer);
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procedure LOpenGLSwapBuffers(Handle: HWND);
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function LOpenGLMakeCurrent(Handle: HWND): boolean;
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procedure LOpenGLClip(Handle: HWND);
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function LOpenGLCreateContext(AWinControl: TWinControl;
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{%H-}WSPrivate: TWSPrivateClass; SharedControl: TWinControl;
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DoubleBuffered, RGBA: boolean;
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const MultiSampling, AlphaBits, DepthBits, StencilBits, AUXBuffers: Cardinal;
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const {%H-}AParams: TCreateParams): HWND;
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procedure LOpenGLDestroyContextInfo(AWinControl: TWinControl);
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function CreateOpenGLContextAttrList(DoubleBuffered: boolean; RGBA: boolean;
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MultiSampling, AlphaBits, DepthBits, StencilBits: cardinal): PInteger;
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type
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TAGLControlInfo = record
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Control: ControlRef;
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WinControl: TWinControl;
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AGLContext: TAGLContext;
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end;
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PAGLControlInfo = ^TAGLControlInfo;
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var
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AGLControlInfo_FOURCC: FourCharCode;
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function CreateAGLControlInfo(Control: ControlRef; AGLContext: TAGLContext;
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WinControl: TWinControl): PAGLControlInfo;
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function GetAGLControlInfo(Control: ControlRef): PAGLControlInfo;
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procedure FreeAGLControlInfo(Control: ControlRef);
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function GetAGLContext(Control: ControlRef): TAGLContext;
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implementation
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procedure LOpenGLViewport(Left, Top, Width, Height: integer);
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begin
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glViewport(Left,Top,Width,Height);
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end;
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procedure LOpenGLSwapBuffers(Handle: HWND);
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var
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AGLContext: TAGLContext;
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begin
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AGLContext:=GetAGLContext(ControlRef(Handle));
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aglSwapBuffers(AGLContext);
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end;
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function LOpenGLMakeCurrent(Handle: HWND): boolean;
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var
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AGLContext: TAGLContext;
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Info: PAGLControlInfo;
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Control: TCarbonCustomControl;
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begin
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Control:=TCarbonCustomControl(Handle);
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Info:=GetAGLControlInfo(Control.Widget);
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if Info=nil then exit;
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AGLContext:=Info^.AGLContext;
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Result:=aglSetCurrentContext(AGLContext)<>0;
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end;
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procedure LOpenGLClip(Handle: HWND);
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var
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AGLContext: TAGLContext;
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Info: PAGLControlInfo;
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Form: TCustomForm;
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Win: WindowRef;
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//b: Rect;
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clipRgn: RgnHandle;
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Control: TCarbonCustomControl;
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begin
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Control:=TCarbonCustomControl(Handle);
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Info:=GetAGLControlInfo(Control.Widget);
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debugln(['LOpenGLMakeCurrent AAA0']);
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if Info=nil then exit;
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AGLContext:=Info^.AGLContext;
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aglSetCurrentContext(AGLContext);
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debugln(['LOpenGLMakeCurrent AAA1 ',dbgs(Handle)]);
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debugln(['LOpenGLMakeCurrent AAA2']);
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Form:=GetParentForm(Info^.WinControl);
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debugln(['LOpenGLMakeCurrent AAA3']);
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Win:=TCarbonWindow(Form.Handle).Window;
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debugln(['LOpenGLMakeCurrent ']);
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//GetWindowPortBounds(Win,b);
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clipRgn:=NewRgn;
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SetRectRgn(clipRgn,10,10,100,100);
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aglSetInteger(TAGLContext(GetWRefCon(Win)),AGL_CLIP_REGION,clipRgn);
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aglEnable(TAGLContext(GetWRefCon(Win)),AGL_CLIP_REGION);
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DisposeRgn(clipRgn);
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end;
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procedure ResizeOGLControl(AWidget: TCarbonWidget);
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var
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info : PAGLControlInfo;
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r : array [0..3] of Integer;
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bnd : HIRect;
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str : MacOSAll.Rect;
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win : WindowRef;
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begin
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info:=GetAGLControlInfo(AWidget.Widget);
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if not Assigned(info) then Exit;
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win:=HIViewGetWindow(AWidget.Widget);
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if not Assigned(win) then Exit;
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GetWindowBounds(win, kWindowStructureRgn, str);
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HIViewGetBounds(AWidget.Widget, bnd);
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HIViewConvertPoint(bnd.origin, AWidget.Widget, nil);
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r[0]:=Round(bnd.origin.x);
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r[1]:=Round((str.bottom-str.top)- bnd.origin.y-bnd.size.height);
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r[2]:=Round(bnd.size.width);
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r[3]:=Round(bnd.size.height);
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aglEnable(info^.aglContext, AGL_BUFFER_RECT);
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aglSetInteger(info^.aglContext, AGL_BUFFER_RECT, @r[0]);
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end;
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function CarbonGLControl_Resize(ANextHandler: EventHandlerCallRef;
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AEvent: EventRef;
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AWidget: TCarbonWidget): OSStatus; {$IFDEF darwin}mwpascal;{$ENDIF}
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begin
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Result:=CallNextEventHandler(ANextHandler, AEvent);
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ResizeOGLControl(AWidget);
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end;
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function CarbonGLControl_WindowChange(ANextHandler: EventHandlerCallRef;
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AEvent: EventRef;
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AWidget: TCarbonWidget): OSStatus; {$IFDEF darwin}mwpascal;{$ENDIF}
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var
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win : WindowRef;
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begin
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Result:=CallNextEventHandler(ANextHandler, AEvent);
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if GetEventParameter(AEvent, kEventParamControlCurrentOwningWindow, typeWindowRef,
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nil, sizeof(win), nil, @win) = noErr then
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if Assigned(win) then ResizeOGLControl(AWidget);
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end;
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function LOpenGLCreateContext(AWinControl: TWinControl;
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WSPrivate: TWSPrivateClass; SharedControl: TWinControl;
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DoubleBuffered, RGBA: boolean;
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const MultiSampling, AlphaBits, DepthBits, StencilBits, AUXBuffers: Cardinal;
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const AParams: TCreateParams): HWND;
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var
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disp: GDHandle;
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aglPixFmt: TAGLPixelFormat;
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aglContext: TAGLContext;
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Control: TCarbonCustomControl;
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AttrList: PInteger;
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C: TCreateParams;
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AGLInfo: PAGLControlInfo;
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TempSpec: EventTypeSpec;
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begin
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Result:=0;
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if AWinControl.Parent=nil then
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RaiseGDBException('GLCarbonAGLContext.LOpenGLCreateContext no parent');
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C.X := AWinControl.Left;
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C.Y := AWinControl.Top;
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C.Width := AWinControl.Width;
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C.Height := AWinControl.Height;
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// create a custom control
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Control := TCarbonCustomControl.Create(AWinControl, C);
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//debugln(['LOpenGLCreateContext ',dbgsName(Control)]);
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// create the AGL context
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disp := GetMainDevice ();
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AttrList:=CreateOpenGLContextAttrList(DoubleBuffered,RGBA,
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MultiSampling,AlphaBits,DepthBits,StencilBits);
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aglPixFmt := aglChoosePixelFormat (@disp, 1, AttrList);
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System.FreeMem(AttrList);
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aglContext := aglCreateContext (aglPixFmt, NIL);
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aglDestroyPixelFormat(aglPixFmt);
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aglSetDrawable(aglContext,
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GetWindowPort(TCarbonWindow(GetParentForm(AWinControl).Handle).Window));
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AGLControlInfo_FOURCC := MakeFourCC('ACI ');
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AGLInfo:=CreateAGLControlInfo(Control.Widget, AGLContext, AWinControl);
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if AGLInfo<>GetAGLControlInfo(Control.Widget) then
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RaiseGDBException('GLCarbonAGLContext.LOpenGLCreateContext inconsistency');
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ResizeOGLControl(Control);
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TempSpec:=MakeEventSpec(kEventClassControl, kEventControlBoundsChanged);
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InstallControlEventHandler(Control.Widget, RegisterEventHandler(@CarbonGLControl_Resize),
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1, @TempSpec, Control, nil);
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TempSpec:=MakeEventSpec(kEventClassControl, kEventControlOwningWindowChanged);
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// The control might be embeded into a window, after the its creation
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// the example of the situation is give at bug report #17244
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InstallControlEventHandler(Control.Widget, RegisterEventHandler(@CarbonGLControl_WindowChange),
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1, @TempSpec, Control, nil);
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Result:=HWnd(Control);
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//debugln(['LOpenGLCreateContext ',dbgs(Result)]);
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end;
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procedure LOpenGLDestroyContextInfo(AWinControl: TWinControl);
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var
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Ref: ControlRef;
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Info: PAGLControlInfo;
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begin
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if not AWinControl.HandleAllocated then exit;
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Ref := ControlRef(TCarbonControl(AWinControl.Handle).Widget);
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Info := GetAGLControlInfo(Ref);
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if Info=nil then exit;
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aglDestroyContext(Info^.AGLContext);
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Info^.AGLContext := nil;
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FreeAGLControlInfo(Ref);
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end;
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function CreateOpenGLContextAttrList(DoubleBuffered: boolean; RGBA: boolean;
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MultiSampling, AlphaBits, DepthBits, StencilBits: cardinal): PInteger;
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var
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p: integer;
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procedure Add(i: integer);
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begin
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if Result<>nil then
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Result[p]:=i;
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inc(p);
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end;
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procedure CreateList;
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begin
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Add(AGL_WINDOW);
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if DoubleBuffered then
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Add(AGL_DOUBLEBUFFER);
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if RGBA then
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Add(AGL_RGBA);
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Add(AGL_NO_RECOVERY);
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Add(AGL_MAXIMUM_POLICY);
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Add(AGL_SINGLE_RENDERER);
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Add(AGL_RED_SIZE); Add(1);
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Add(AGL_GREEN_SIZE); Add(1);
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Add(AGL_BLUE_SIZE); Add(1);
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Add(AGL_ALPHA_SIZE); Add(AlphaBits);
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Add(AGL_DEPTH_SIZE); Add(DepthBits);
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Add(AGL_STENCIL_SIZE); Add(StencilBits);
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Add(AGL_NONE);
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end;
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begin
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Result:=nil;
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p:=0;
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CreateList;
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GetMem(Result,SizeOf(integer)*p);
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p:=0;
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CreateList;
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end;
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function CreateAGLControlInfo(Control: ControlRef; AGLContext: TAGLContext;
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WinControl: TWinControl): PAGLControlInfo;
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begin
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New(Result);
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FillByte(Result^, SizeOf(Result^), 0);
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Result^.Control:=Control;
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Result^.WinControl:=WinControl;
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Result^.AGLContext:=AGLContext;
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SetControlProperty(Control, LAZARUS_FOURCC, AGLControlInfo_FOURCC,
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SizeOf(Result), @Result);
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end;
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function GetAGLControlInfo(Control: ControlRef): PAGLControlInfo;
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var
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m: LongWord;
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begin
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GetControlProperty(Control, LAZARUS_FOURCC, AGLControlInfo_FOURCC,
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SizeOf(Result), @m, @Result);
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end;
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procedure FreeAGLControlInfo(Control: ControlRef);
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var
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Info: PAGLControlInfo;
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begin
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Info:=GetAGLControlInfo(Control);
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if Info=nil then exit;
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RemoveControlProperty(Control, LAZARUS_FOURCC, AGLControlInfo_FOURCC);
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System.FreeMem(Info);
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end;
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function GetAGLContext(Control: ControlRef): TAGLContext;
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begin
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Result:=GetAGLControlInfo(TCarbonCustomControl(Control).Widget)^.AGLContext;
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end;
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initialization
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finalization
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end.
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