aboutsummaryrefslogtreecommitdiffstats
path: root/VideoPreview/src/lib/JEDI-SDL/SDL/Pas/sdlwindow.pas
blob: 99eea304cf458c1a6b86d3da1cb26d4c7e6280d4 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
unit sdlwindow;
{
  $Id: sdlwindow.pas,v 1.9 2006/10/22 18:55:25 savage Exp $
  
}
{******************************************************************************}
{                                                                              }
{          JEDI-SDL : Pascal units for SDL - Simple DirectMedia Layer          }
{                SDL Window Wrapper                                            }
{                                                                              }
{                                                                              }
{ The initial developer of this Pascal code was :                              }
{ Dominique Louis <Dominique@SavageSoftware.com.au>                            }
{                                                                              }
{ Portions created by Dominique Louis are                                      }
{ Copyright (C) 2004 - 2100 Dominique Louis.                                   }
{                                                                              }
{                                                                              }
{ Contributor(s)                                                               }
{ --------------                                                               }
{ Dominique Louis <Dominique@SavageSoftware.com.au>                            }
{                                                                              }
{ Obtained through:                                                            }
{ Joint Endeavour of Delphi Innovators ( Project JEDI )                        }
{                                                                              }
{ You may retrieve the latest version of this file at the Project              }
{ JEDI home page, located at http://delphi-jedi.org                            }
{                                                                              }
{ The contents of this file are used with permission, subject to               }
{ the Mozilla Public License Version 1.1 (the "License"); you may              }
{ not use this file except in compliance with the License. You may             }
{ obtain a copy of the License at                                              }
{ http://www.mozilla.org/MPL/MPL-1.1.html                                      }
{                                                                              }
{ Software distributed under the License is distributed on an                  }
{ "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or               }
{ implied. See the License for the specific language governing                 }
{ rights and limitations under the License.                                    }
{                                                                              }
{ Description                                                                  }
{ -----------                                                                  }
{   SDL Window Wrapper                                                         }
{                                                                              }
{                                                                              }
{ Requires                                                                     }
{ --------                                                                     }
{   SDL.dll on Windows platforms                                               }
{   libSDL-1.1.so.0 on Linux platform                                          }
{                                                                              }
{ Programming Notes                                                            }
{ -----------------                                                            }
{                                                                              }
{                                                                              }
{                                                                              }
{                                                                              }
{ Revision History                                                             }
{ ----------------                                                             }
{ January    31     2003 - DL : Initial creation                               }
{                                                                              }
{
  $Log: sdlwindow.pas,v $
  Revision 1.9  2006/10/22 18:55:25  savage
  Slight Change to handle OpenGL context

  Revision 1.8  2005/08/03 18:57:32  savage
  Various updates and additions. Mainly to handle OpenGL 3D Window support and better cursor support for the mouse class

  Revision 1.7  2004/09/30 22:35:47  savage
  Changes, enhancements and additions as required to get SoAoS working.

  Revision 1.6  2004/09/12 21:52:58  savage
  Slight changes to fix some issues with the sdl classes.

  Revision 1.5  2004/05/10 21:11:49  savage
  changes required to help get SoAoS off the ground.

  Revision 1.4  2004/05/01 14:59:27  savage
  Updated code

  Revision 1.3  2004/04/23 10:45:28  savage
  Changes made by Dean Ellis to work more modularly.

  Revision 1.2  2004/03/31 10:06:41  savage
  Changed so that it now compiles, but is untested.

  Revision 1.1  2004/02/05 00:08:20  savage
  Module 1.0 release
  
}
{******************************************************************************}

interface

{$i jedi-sdl.inc}

uses
  Classes,
  sdl,
  sdlinput,
  sdlticks;

type
  TSDLNotifyEvent =  procedure {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLUpdateEvent =  procedure( aElapsedTime : single ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLResizeEvent =  procedure( aWidth : integer; aHeight : integer; aBitDepth : integer; aVideoFlags : Uint32 ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLUserEvent =  procedure( aType : UInt8; aCode : integer; aData1 : Pointer; aData2 : Pointer ) {$IFNDEF NOT_OO}of object{$ENDIF};
  TSDLActiveEvent = procedure( aGain: UInt8; aState: UInt8 ) {$IFNDEF NOT_OO}of object{$ENDIF};

  TSDLBaseWindow = class( TObject )
  private
    FDisplaySurface : PSDL_Surface;
    FVideoFlags : Uint32;
    FOnDestroy: TSDLNotifyEvent;
    FOnCreate: TSDLNotifyEvent;
    FOnShow: TSDLNotifyEvent;
    FOnResize: TSDLResizeEvent;
    FOnUpdate: TSDLUpdateEvent;
    FOnRender: TSDLNotifyEvent;
    FOnClose: TSDLNotifyEvent;
    FLoaded: Boolean;
    FRendering: Boolean;
    FHeight: integer;
    FBitDepth: integer;
    FWidth: integer;
    FInputManager: TSDLInputManager;
    FCaptionText : PChar;
    FIconName : PChar;
    FOnActive: TSDLActiveEvent;
    FOnQuit: TSDLNotifyEvent;
    FOnExpose: TSDLNotifyEvent;
    FOnUser: TSDLUserEvent;
    FTimer : TSDLTicks;
  protected
    procedure DoActive( aGain: UInt8; aState: UInt8 );
    procedure DoCreate;
    procedure DoClose;
    procedure DoDestroy;
    procedure DoUpdate( aElapsedTime : single );
    procedure DoQuit;
    procedure DoRender;
    procedure DoResize( aWidth : integer; aHeight : integer; aBitDepth : integer; aVideoFlags : Uint32 );
    procedure DoShow;
    procedure DoUser( aType : UInt8; aCode : integer; aData1 : Pointer; aData2 : Pointer );
    procedure DoExpose;
    procedure Render; virtual;
    procedure Update( aElapsedTime : single ); virtual;
    procedure InitialiseObjects; virtual;
    procedure RestoreObjects; virtual;
    procedure DeleteObjects; virtual;
    function Flip : integer; virtual;
    property OnActive : TSDLActiveEvent read FOnActive write FOnActive;
    property OnClose: TSDLNotifyEvent read FOnClose write FOnClose;
    property OnDestroy : TSDLNotifyEvent read FOnDestroy write FOnDestroy;
    property OnCreate : TSDLNotifyEvent read FOnCreate write FOnCreate;
    property OnUpdate: TSDLUpdateEvent read FOnUpdate write FOnUpdate;
    property OnQuit : TSDLNotifyEvent read FOnQuit write FOnQuit;
    property OnResize : TSDLResizeEvent read FOnResize write FOnResize;
    property OnRender: TSDLNotifyEvent read FOnRender write FOnRender;
    property OnShow : TSDLNotifyEvent read FOnShow write FOnShow;
    property OnUser : TSDLUserEvent read FOnUser write FOnUser;
    property OnExpose : TSDLNotifyEvent read FOnExpose write FOnExpose;
    property DisplaySurface: PSDL_Surface read FDisplaySurface;
  public
    property InputManager : TSDLInputManager read FInputManager;
    property Loaded : Boolean read FLoaded;
    property Width : integer read FWidth;
    property Height : integer read FHeight;
    property BitDepth : integer read FBitDepth;
    property Rendering : Boolean read FRendering write FRendering;
    procedure SetCaption( const aCaptionText : string; const aIconName : string );
    procedure GetCaption( var aCaptionText : string; var aIconName : string );
    procedure SetIcon( aIcon : PSDL_Surface; aMask: UInt8 );
    procedure ActivateVideoMode;
    constructor Create( aWidth : integer; aHeight : integer; aBitDepth : integer; aVideoFlags : Uint32 ); virtual;
    destructor Destroy; override;
    procedure InitialiseEnvironment;
    function Show : Boolean; virtual;
  end;

  TSDLCustomWindow = class( TSDLBaseWindow )
  public
    property OnCreate;
    property OnDestroy;
    property OnClose;
    property OnShow;
    property OnResize;
    property OnRender;
    property OnUpdate;
    property DisplaySurface;
  end;

  TSDL2DWindow = class( TSDLCustomWindow )
  public
    constructor Create( aWidth : integer; aHeight : integer; aBitDepth : integer; aVideoFlags : Uint32 = SDL_DOUBLEBUF or SDL_SWSURFACE); override;
    procedure Render; override;
    procedure Update( aElapsedTime : single ); override;
    procedure InitialiseObjects; override;
    procedure RestoreObjects; override;
    procedure DeleteObjects; override;
    function Flip : integer; override;
  end;

  TSDL3DWindow = class( TSDLCustomWindow )
  public
    constructor Create( aWidth : integer; aHeight : integer; aBitDepth : integer; aVideoFlags : Uint32 = SDL_OPENGL or SDL_DOUBLEBUF); override;
    function Flip : integer; override;
    procedure Render; override;
    procedure Update( aElapsedTime : single ); override;
    procedure InitialiseObjects; override;
    procedure RestoreObjects; override;
    procedure DeleteObjects; override;
  end;



implementation

uses
  logger,
  SysUtils;

{ TSDLBaseWindow }
procedure TSDLBaseWindow.ActivateVideoMode;
begin
  FDisplaySurface := SDL_SetVideoMode( FWidth, FHeight, FBitDepth, FVideoFlags);
  if (FDisplaySurface = nil) then
  begin
    Log.LogError( Format('Could not set video mode: %s', [SDL_GetError]), 'Main');
    exit;
  end;

  SetCaption( 'Made with JEDI-SDL', 'JEDI-SDL Icon' );
end;

constructor TSDLBaseWindow.Create( aWidth : integer; aHeight : integer; aBitDepth : integer; aVideoFlags : Uint32 );
begin
  inherited Create;
  SDL_Init(SDL_INIT_EVERYTHING);
  FInputManager := TSDLInputManager.Create( [ itJoystick, itKeyBoard, itMouse ]);
  FTimer := TSDLTicks.Create;

  FWidth := aWidth;
  FHeight := aHeight;
  FBitDepth := aBitDepth;
  FVideoFlags := aVideoFlags;

  DoCreate;
end;

procedure TSDLBaseWindow.DeleteObjects;
begin
  FLoaded := False;
end;

destructor TSDLBaseWindow.Destroy;
begin
  DoDestroy;
  if FLoaded then
    DeleteObjects;
  if FInputManager <> nil then
    FreeAndNil( FInputManager );
  if FTimer <> nil then
    FreeAndNil( FTimer );
  if FDisplaySurface <> nil then
    SDL_FreeSurface( FDisplaySurface );
  inherited Destroy;
  SDL_Quit;
end;

procedure TSDLBaseWindow.DoActive(aGain, aState: UInt8);
begin
  if Assigned( FOnActive ) then
  begin
    FOnActive( aGain, aState );
  end;
end;

procedure TSDLBaseWindow.DoClose;
begin
  if Assigned( FOnClose ) then
  begin
    FOnClose;
  end;
end;

procedure TSDLBaseWindow.DoCreate;
begin
  if Assigned( FOnCreate ) then
  begin
    FOnCreate;
  end;
end;

procedure TSDLBaseWindow.DoDestroy;
begin
  if Assigned( FOnDestroy ) then
  begin
    FOnDestroy;
  end;
end;

procedure TSDLBaseWindow.DoExpose;
begin
  if Assigned( FOnExpose ) then
  begin
    FOnExpose;
  end;
end;

procedure TSDLBaseWindow.DoUpdate( aElapsedTime : single );
begin
  if Assigned( FOnUpdate ) then
  begin
    FOnUpdate( aElapsedTime );
  end;
end;

procedure TSDLBaseWindow.DoQuit;
begin
  FRendering := false;
  if Assigned( FOnQuit ) then
  begin
    FOnQuit;
  end;
end;

procedure TSDLBaseWindow.DoRender;
begin
  if Assigned(  FOnRender ) then
  begin
    FOnRender;
  end;
end;

procedure TSDLBaseWindow.DoResize( aWidth : integer; aHeight : integer; aBitDepth : integer; aVideoFlags : Uint32 );
begin
  // resize to the new size
  SDL_FreeSurface(FDisplaySurface);
  FWidth := aWidth;
  FHeight := aHeight;
  FBitDepth := aBitDepth;
  FVideoFlags := aVideoFlags;
  FDisplaySurface := SDL_SetVideoMode(aWidth, aHeight, aBitDepth, aVideoFlags);
  if Assigned( FOnResize ) then
  begin
    FOnResize( aWidth, aHeight, aBitDepth, aVideoFlags );
  end;
end;

procedure TSDLBaseWindow.DoShow;
begin
  if Assigned( FOnShow ) then
  begin
    FOnShow;
  end;
end;

procedure TSDLBaseWindow.DoUser(aType: UInt8; aCode: integer; aData1, aData2: Pointer);
begin
  if Assigned(  FOnUser ) then
  begin
    FOnUser( aType, aCode, aData1, aData2 );
  end;
end;

function TSDLBaseWindow.Flip : integer;
begin
  result := 0;
end;

procedure TSDLBaseWindow.GetCaption( var aCaptionText : string; var aIconName : string );
begin
  aCaptionText := string( FCaptionText );
  aIconName := string( FIconName );
end;

procedure TSDLBaseWindow.InitialiseEnvironment;
begin
  InitialiseObjects;
  RestoreObjects;
end;

procedure TSDLBaseWindow.InitialiseObjects;
begin
  FLoaded := True;
end;

procedure TSDLBaseWindow.Update( aElapsedTime : single );
begin
  DoUpdate( aElapsedTime );
end;

procedure TSDLBaseWindow.Render;
begin
  DoRender;
end;

procedure TSDLBaseWindow.RestoreObjects;
begin
  FLoaded := false;
end;

procedure TSDLBaseWindow.SetCaption( const aCaptionText : string; const aIconName : string );
begin
  if FCaptionText <> aCaptionText then
  begin
    FCaptionText := PChar( aCaptionText );
    FIconName := PChar( aIconName );
    SDL_WM_SetCaption( FCaptionText, FIconName );
  end;
end;

procedure TSDLBaseWindow.SetIcon(aIcon: PSDL_Surface; aMask: UInt8);
begin
  SDL_WM_SetIcon( aIcon, aMask );
end;

function TSDLBaseWindow.Show : Boolean;
var
  eBaseWindowEvent : TSDL_Event;
begin
  DoShow;

  FTimer.Init;

  FRendering := true;
  // repeat until we are told not to render
  while FRendering do
  begin
    // wait for an event
    while SDL_PollEvent( @eBaseWindowEvent ) > 0 do
    begin

      // check for a quit event
      case eBaseWindowEvent.type_ of
        SDL_ACTIVEEVENT :
        begin
          DoActive( eBaseWindowEvent.active.gain, eBaseWindowEvent.active.state );
        end;

        SDL_QUITEV :
        begin
          DoQuit;
          DoClose;
        end;

        SDL_USEREVENT :
        begin
          DoUser( eBaseWindowEvent.user.type_, eBaseWindowEvent.user.code, eBaseWindowEvent.user.data1, eBaseWindowEvent.user.data2 );
        end;

        SDL_VIDEOEXPOSE :
        begin
          DoExpose;
        end;

        SDL_VIDEORESIZE :
        begin
          DoResize( eBaseWindowEvent.resize.w, eBaseWindowEvent.resize.h, FDisplaySurface.format.BitsPerPixel, FVideoflags );
        end;


      end;
      InputManager.UpdateInputs( eBaseWindowEvent );
    end;
    // Prepare the Next Frame
    Update( FTimer.GetElapsedSeconds );
    // Display the Next Frame
    Render;
    // Flip the surfaces
    Flip;
  end;

  Result := FRendering;
end;

{ TSDL2DWindow }

constructor TSDL2DWindow.Create(aWidth, aHeight, aBitDepth: integer; aVideoFlags: Uint32);
begin
  // make sure double buffer is always included in the video flags
  inherited Create(aWidth,aHeight, aBitDepth, aVideoFlags or SDL_DOUBLEBUF);
end;

procedure TSDL2DWindow.DeleteObjects;
begin
  inherited;

end;

function TSDL2DWindow.Flip: integer;
begin
  // let's show the back buffer
  result := SDL_Flip( FDisplaySurface );
end;

procedure TSDL2DWindow.InitialiseObjects;
begin
  inherited;

end;

procedure TSDL2DWindow.Update( aElapsedTime : single );
begin
  inherited;

end;

procedure TSDL2DWindow.Render;
begin
  inherited;

end;

procedure TSDL2DWindow.RestoreObjects;
begin
  inherited;

end;

{ TSDL3DWindow }

constructor TSDL3DWindow.Create(aWidth,
  aHeight, aBitDepth: integer; aVideoFlags: Uint32);
begin
  // make sure opengl is always included in the video flags
  inherited Create(aWidth,aHeight, aBitDepth, aVideoFlags or SDL_OPENGL or SDL_DOUBLEBUF);
end;

procedure TSDL3DWindow.DeleteObjects;
begin
  inherited;

end;

function TSDL3DWindow.Flip : integer;
begin
  SDL_GL_SwapBuffers;
  result := 0;
end;

procedure TSDL3DWindow.InitialiseObjects;
begin
  inherited;

end;

procedure TSDL3DWindow.Update( aElapsedTime : single );
begin
  inherited;

end;

procedure TSDL3DWindow.Render;
begin
  inherited;
  
end;

procedure TSDL3DWindow.RestoreObjects;
begin
  inherited;

end;

end.