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comparison mupdf-source/thirdparty/freeglut/src/fg_window.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * fg_window.c
3 *
4 * Window management methods.
5 *
6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
8 * Creation date: Fri Dec 3 1999
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28 #define FREEGLUT_BUILDING_LIB
29 #include <GL/freeglut.h>
30 #include "fg_internal.h"
31 #include "fg_gl2.h"
32
33 /*
34 * TODO BEFORE THE STABLE RELEASE:
35 *
36 * fgSetupPixelFormat -- ignores the display mode settings
37 * fgOpenWindow() -- check the Win32 version, -iconic handling!
38 * fgCloseWindow() -- check the Win32 version
39 * glutCreateWindow() -- Check when default position and size is {-1,-1}
40 * glutCreateSubWindow() -- Check when default position and size is {-1,-1}
41 * glutDestroyWindow() -- check the Win32 version
42 * glutSetWindow() -- check the Win32 version
43 * glutSetWindowTitle() -- check the Win32 version
44 * glutSetIconTitle() -- check the Win32 version
45 * glutShowWindow() -- check the Win32 version
46 * glutHideWindow() -- check the Win32 version
47 * glutIconifyWindow() -- check the Win32 version
48 * glutPushWindow() -- check the Win32 version
49 * glutPopWindow() -- check the Win32 version
50 */
51
52
53 extern void fgPlatformSetWindow ( SFG_Window *window );
54 extern void fgPlatformOpenWindow( SFG_Window* window, const char* title,
55 GLboolean positionUse, int x, int y,
56 GLboolean sizeUse, int w, int h,
57 GLboolean gameMode, GLboolean isSubWindow );
58 extern void fgPlatformCloseWindow( SFG_Window* window );
59 extern void fgPlatformGlutSetWindowTitle( const char* title );
60 extern void fgPlatformGlutSetIconTitle( const char* title );
61
62
63 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
64
65 int fghIsLegacyContextRequested( void )
66 {
67 return fgState.MajorVersion < 2 || (fgState.MajorVersion == 2 && fgState.MinorVersion <= 1);
68 }
69
70 int fghNumberOfAuxBuffersRequested( void )
71 {
72 if ( fgState.DisplayMode & GLUT_AUX4 ) {
73 return 4;
74 }
75 if ( fgState.DisplayMode & GLUT_AUX3 ) {
76 return 3;
77 }
78 if ( fgState.DisplayMode & GLUT_AUX2 ) {
79 return 2;
80 }
81 if ( fgState.DisplayMode & GLUT_AUX1 ) { /* NOTE: Same as GLUT_AUX! */
82 return fgState.AuxiliaryBufferNumber;
83 }
84 return 0;
85 }
86
87 int fghMapBit( int mask, int from, int to )
88 {
89 return ( mask & from ) ? to : 0;
90
91 }
92
93 void fghContextCreationError( void )
94 {
95 fgError( "Unable to create OpenGL %d.%d context (flags %x, profile %x)",
96 fgState.MajorVersion, fgState.MinorVersion, fgState.ContextFlags,
97 fgState.ContextProfile );
98 }
99
100
101 /* -- SYSTEM-DEPENDENT PRIVATE FUNCTIONS ------------------------------------ */
102
103 /*
104 * Sets the OpenGL context and the fgStructure "Current Window" pointer to
105 * the window structure passed in.
106 */
107 void fgSetWindow ( SFG_Window *window )
108 {
109 fgPlatformSetWindow ( window );
110
111 fgStructure.CurrentWindow = window;
112 }
113
114 /*
115 * Opens a window. Requires a SFG_Window object created and attached
116 * to the freeglut structure. OpenGL context is created here.
117 */
118 void fgOpenWindow( SFG_Window* window, const char* title,
119 GLboolean positionUse, int x, int y,
120 GLboolean sizeUse, int w, int h,
121 GLboolean gameMode, GLboolean isSubWindow )
122 {
123 fgPlatformOpenWindow( window, title,
124 positionUse, x, y,
125 sizeUse, w, h,
126 gameMode, isSubWindow );
127
128 fgSetWindow( window );
129
130 #ifndef EGL_VERSION_1_0
131 window->Window.DoubleBuffered =
132 ( fgState.DisplayMode & GLUT_DOUBLE ) ? 1 : 0;
133
134 if ( ! window->Window.DoubleBuffered )
135 {
136 glDrawBuffer ( GL_FRONT );
137 glReadBuffer ( GL_FRONT );
138 }
139 #else
140 /* - EGL is always double-buffered */
141 /* - No glDrawBuffer/glReadBuffer in GLES */
142 window->Window.DoubleBuffered = 1;
143 #endif
144 window->Window.attribute_v_coord = -1;
145 window->Window.attribute_v_normal = -1;
146 window->Window.attribute_v_texture = -1;
147
148 fgInitGL2();
149
150 window->State.WorkMask |= GLUT_INIT_WORK;
151 }
152
153 /*
154 * Closes a window, destroying the frame and OpenGL context
155 */
156 void fgCloseWindow( SFG_Window* window )
157 {
158 /* if we're in gamemode and we're closing the gamemode window,
159 * call glutLeaveGameMode first to make sure the gamemode is
160 * properly closed before closing the window
161 */
162 if (fgStructure.GameModeWindow != NULL && fgStructure.GameModeWindow->ID==window->ID)
163 glutLeaveGameMode();
164
165 fgPlatformCloseWindow ( window );
166 }
167
168
169 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
170
171 /*
172 * Creates a new top-level freeglut window
173 */
174 int FGAPIENTRY glutCreateWindow( const char* title )
175 {
176 /* XXX GLUT does not exit; it simply calls "glutInit" quietly if the
177 * XXX application has not already done so. The "freeglut" community
178 * XXX decided not to go this route (freeglut-developer e-mail from
179 * XXX Steve Baker, 12/16/04, 4:22 PM CST, "Re: [Freeglut-developer]
180 * XXX Desired 'freeglut' behaviour when there is no current window"
181 */
182 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateWindow" );
183
184 return fgCreateWindow( NULL, title, fgState.Position.Use,
185 fgState.Position.X, fgState.Position.Y,
186 fgState.Size.Use, fgState.Size.X, fgState.Size.Y,
187 GL_FALSE, GL_FALSE )->ID;
188 }
189
190 /*
191 * This function creates a sub window.
192 */
193 int FGAPIENTRY glutCreateSubWindow( int parentID, int x, int y, int w, int h )
194 {
195 int ret = 0;
196 SFG_Window* window = NULL;
197 SFG_Window* parent = NULL;
198
199 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateSubWindow" );
200 parent = fgWindowByID( parentID );
201 freeglut_return_val_if_fail( parent != NULL, 0 );
202 if ( x < 0 )
203 {
204 x = parent->State.Width + x ;
205 if ( w >= 0 ) x -= w ;
206 }
207
208 if ( w < 0 ) w = parent->State.Width - x + w ;
209 if ( w < 0 )
210 {
211 x += w ;
212 w = -w ;
213 }
214
215 if ( y < 0 )
216 {
217 y = parent->State.Height + y ;
218 if ( h >= 0 ) y -= h ;
219 }
220
221 if ( h < 0 ) h = parent->State.Height - y + h ;
222 if ( h < 0 )
223 {
224 y += h ;
225 h = -h ;
226 }
227
228 window = fgCreateWindow( parent, "", GL_TRUE, x, y, GL_TRUE, w, h, GL_FALSE, GL_FALSE );
229 ret = window->ID;
230
231 return ret;
232 }
233
234 /*
235 * Destroys a window and all of its subwindows
236 */
237 void FGAPIENTRY glutDestroyWindow( int windowID )
238 {
239 SFG_Window* window;
240 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDestroyWindow" );
241 window = fgWindowByID( windowID );
242 freeglut_return_if_fail( window != NULL );
243 {
244 fgExecutionState ExecState = fgState.ExecState;
245 fgAddToWindowDestroyList( window );
246 fgState.ExecState = ExecState;
247 }
248 }
249
250 /*
251 * This function selects the specified window as the current window
252 */
253 void FGAPIENTRY glutSetWindow( int ID )
254 {
255 SFG_Window* window = NULL;
256
257 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindow" );
258 if( fgStructure.CurrentWindow != NULL )
259 if( fgStructure.CurrentWindow->ID == ID )
260 return;
261
262 window = fgWindowByID( ID );
263 if( window == NULL )
264 {
265 fgWarning( "glutSetWindow(): window ID %d not found!", ID );
266 return;
267 }
268
269 fgSetWindow( window );
270 }
271
272 /*
273 * This function returns the ID number of the current window, 0 if none exists
274 */
275 int FGAPIENTRY glutGetWindow( void )
276 {
277 SFG_Window *win = fgStructure.CurrentWindow;
278 /*
279 * Since GLUT did not throw an error if this function was called without a prior call to
280 * "glutInit", this function shouldn't do so here. Instead let us return a zero.
281 * See Feature Request "[ 1307049 ] glutInit check".
282 */
283 if ( ! fgState.Initialised )
284 return 0;
285
286 while ( win && win->IsMenu )
287 win = win->Parent;
288 return win ? win->ID : 0;
289 }
290
291 /*
292 * This function makes the current window visible
293 */
294 void FGAPIENTRY glutShowWindow( void )
295 {
296 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutShowWindow" );
297 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutShowWindow" );
298
299 fgStructure.CurrentWindow->State.WorkMask |= GLUT_VISIBILITY_WORK;
300 fgStructure.CurrentWindow->State.DesiredVisibility = DesireNormalState;
301
302 fgStructure.CurrentWindow->State.WorkMask |= GLUT_DISPLAY_WORK;
303 }
304
305 /*
306 * This function hides the current window
307 */
308 void FGAPIENTRY glutHideWindow( void )
309 {
310 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutHideWindow" );
311 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutHideWindow" );
312
313 fgStructure.CurrentWindow->State.WorkMask |= GLUT_VISIBILITY_WORK;
314 fgStructure.CurrentWindow->State.DesiredVisibility = DesireHiddenState;
315
316 fgStructure.CurrentWindow->State.WorkMask &= ~GLUT_DISPLAY_WORK;
317 }
318
319 /*
320 * Iconify the current window (top-level windows only)
321 */
322 void FGAPIENTRY glutIconifyWindow( void )
323 {
324 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutIconifyWindow" );
325 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutIconifyWindow" );
326
327 fgStructure.CurrentWindow->State.WorkMask |= GLUT_VISIBILITY_WORK;
328 fgStructure.CurrentWindow->State.DesiredVisibility = DesireIconicState;
329
330 fgStructure.CurrentWindow->State.WorkMask &= ~GLUT_DISPLAY_WORK;
331 }
332
333 /*
334 * Set the current window's title
335 */
336 void FGAPIENTRY glutSetWindowTitle( const char* title )
337 {
338 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindowTitle" );
339 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetWindowTitle" );
340 if( ! fgStructure.CurrentWindow->Parent )
341 {
342 fgPlatformGlutSetWindowTitle ( title );
343 }
344 }
345
346 /*
347 * Set the current window's iconified title
348 */
349 void FGAPIENTRY glutSetIconTitle( const char* title )
350 {
351 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetIconTitle" );
352 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetIconTitle" );
353
354 if( ! fgStructure.CurrentWindow->Parent )
355 {
356 fgPlatformGlutSetIconTitle ( title );
357 }
358 }
359
360 /*
361 * This function sets the clipboard content to the UTF-8 encoded text.
362 */
363 void FGAPIENTRY glutSetClipboard(int selection, const char *text)
364 {
365 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetClipboard" );
366 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetClipboard" );
367
368 fgPlatformSetClipboard(selection, text);
369 }
370
371 /*
372 * This function returns the clipboard content as UTF-8 encoded text,
373 * or NULL if no content was available.
374 */
375 const char* FGAPIENTRY glutGetClipboard(int selection)
376 {
377 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetClipboard" );
378 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutGetClipboard" );
379
380 return fgPlatformGetClipboard(selection);
381 }
382
383 /*
384 * Change the current window's size
385 */
386 void FGAPIENTRY glutReshapeWindow( int width, int height )
387 {
388 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutReshapeWindow" );
389 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutReshapeWindow" );
390
391 if (glutGet(GLUT_FULL_SCREEN))
392 {
393 /* Leave full screen state before resizing. */
394 glutLeaveFullScreen();
395 }
396
397 fgStructure.CurrentWindow->State.WorkMask |= GLUT_SIZE_WORK;
398 fgStructure.CurrentWindow->State.DesiredWidth = width ;
399 fgStructure.CurrentWindow->State.DesiredHeight = height;
400 }
401
402 /*
403 * Change the current window's position
404 */
405 void FGAPIENTRY glutPositionWindow( int x, int y )
406 {
407 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPositionWindow" );
408 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPositionWindow" );
409
410 if (glutGet(GLUT_FULL_SCREEN))
411 {
412 /* Leave full screen state before moving. */
413 glutLeaveFullScreen();
414 }
415
416 fgStructure.CurrentWindow->State.WorkMask |= GLUT_POSITION_WORK;
417 fgStructure.CurrentWindow->State.DesiredXpos = x;
418 fgStructure.CurrentWindow->State.DesiredYpos = y;
419 }
420
421 /*
422 * Lowers the current window (by Z order change)
423 */
424 void FGAPIENTRY glutPushWindow( void )
425 {
426 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPushWindow" );
427 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPushWindow" );
428
429 fgStructure.CurrentWindow->State.WorkMask |= GLUT_ZORDER_WORK;
430 fgStructure.CurrentWindow->State.DesiredZOrder = -1;
431 }
432
433 /*
434 * Raises the current window (by Z order change)
435 */
436 void FGAPIENTRY glutPopWindow( void )
437 {
438 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPopWindow" );
439 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPopWindow" );
440
441 fgStructure.CurrentWindow->State.WorkMask |= GLUT_ZORDER_WORK;
442 fgStructure.CurrentWindow->State.DesiredZOrder = 1;
443 }
444
445 /*
446 * Resize the current window so that it fits the whole screen
447 */
448 void FGAPIENTRY glutFullScreen( void )
449 {
450 SFG_Window *win;
451
452 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutFullScreen" );
453 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutFullScreen" );
454
455 win = fgStructure.CurrentWindow;
456
457 if (win->Parent)
458 {
459 /* Child windows cannot be made fullscreen, consistent with GLUT's behavior
460 * Also, what would it mean for a child window to be fullscreen, given that it
461 * is confined to its parent?
462 */
463 fgWarning("glutFullScreen called on a child window, ignoring...");
464 return;
465 }
466 else if (fgStructure.GameModeWindow != NULL && fgStructure.GameModeWindow->ID==win->ID && win->State.IsFullscreen)
467 {
468 /* Ignore fullscreen call on GameMode window, those are always fullscreen already
469 * only exception is when first entering GameMode
470 */
471 return;
472 }
473
474 if (!win->State.IsFullscreen)
475 win->State.WorkMask |= GLUT_FULL_SCREEN_WORK;
476 }
477
478 /*
479 * If we are fullscreen, resize the current window back to its original size
480 */
481 void FGAPIENTRY glutLeaveFullScreen( void )
482 {
483 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutFullScreen" );
484 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutFullScreen" );
485
486 if (fgStructure.CurrentWindow->State.IsFullscreen)
487 fgStructure.CurrentWindow->State.WorkMask |= GLUT_FULL_SCREEN_WORK;
488 }
489
490 /*
491 * Toggle the window's full screen state.
492 */
493 void FGAPIENTRY glutFullScreenToggle( void )
494 {
495 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutFullScreenToggle" );
496 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutFullScreenToggle" );
497
498 fgStructure.CurrentWindow->State.WorkMask |= GLUT_FULL_SCREEN_WORK;
499 }
500
501 /*
502 * A.Donev: Set and retrieve the window's user data
503 */
504 void* FGAPIENTRY glutGetWindowData( void )
505 {
506 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetWindowData" );
507 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutGetWindowData" );
508 return fgStructure.CurrentWindow->UserData;
509 }
510
511 void FGAPIENTRY glutSetWindowData(void* data)
512 {
513 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindowData" );
514 FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetWindowData" );
515 fgStructure.CurrentWindow->UserData = data;
516 }
517
518 /*** END OF FILE ***/