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1 | /////////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/mac/carbon/glcanvas.cpp | |
3 | // Purpose: wxGLCanvas, for using OpenGL with wxWidgets under Macintosh | |
4 | // Author: Stefan Csomor | |
5 | // Modified by: | |
6 | // Created: 1998-01-01 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) Stefan Csomor | |
9 | // Licence: wxWindows licence | |
10 | /////////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | // ============================================================================ | |
13 | // declarations | |
14 | // ============================================================================ | |
15 | ||
16 | // ---------------------------------------------------------------------------- | |
17 | // headers | |
18 | // ---------------------------------------------------------------------------- | |
19 | ||
20 | #include "wx/wxprec.h" | |
21 | ||
22 | #if defined(__BORLANDC__) | |
23 | #pragma hdrstop | |
24 | #endif | |
25 | ||
26 | #if wxUSE_GLCANVAS | |
27 | ||
28 | #include "wx/glcanvas.h" | |
29 | ||
30 | #ifndef WX_PRECOMP | |
31 | #include "wx/frame.h" | |
32 | #include "wx/log.h" | |
33 | #include "wx/settings.h" | |
34 | #endif | |
35 | ||
36 | #include "wx/osx/uma.h" | |
37 | ||
38 | #include "wx/osx/private.h" | |
39 | ||
40 | // ---------------------------------------------------------------------------- | |
41 | // helper functions | |
42 | // ---------------------------------------------------------------------------- | |
43 | ||
44 | static void wxLogAGLError(const char *func) | |
45 | { | |
46 | const int err = aglGetError(); | |
47 | ||
48 | wxLogError(_("OpenGL function \"%s\" failed: %s (error %d)"), | |
49 | func, aglErrorString(err), err); | |
50 | } | |
51 | ||
52 | // ============================================================================ | |
53 | // implementation | |
54 | // ============================================================================ | |
55 | ||
56 | // ---------------------------------------------------------------------------- | |
57 | // wxGLContext | |
58 | // ---------------------------------------------------------------------------- | |
59 | ||
60 | wxGLContext::wxGLContext(wxGLCanvas *win, const wxGLContext *other) | |
61 | { | |
62 | m_aglContext = aglCreateContext(win->GetAGLPixelFormat(), | |
63 | other ? other->m_aglContext : NULL); | |
64 | if ( !m_aglContext ) | |
65 | wxLogAGLError("aglCreateContext"); | |
66 | } | |
67 | ||
68 | wxGLContext::~wxGLContext() | |
69 | { | |
70 | if ( m_aglContext ) | |
71 | { | |
72 | // it's ok to pass the current context to this function | |
73 | if ( !aglDestroyContext(m_aglContext) ) | |
74 | wxLogAGLError("aglDestroyContext"); | |
75 | } | |
76 | } | |
77 | ||
78 | bool wxGLContext::SetCurrent(const wxGLCanvas& win) const | |
79 | { | |
80 | if ( !m_aglContext ) | |
81 | return false; | |
82 | ||
83 | AGLDrawable drawable = (AGLDrawable)GetWindowPort( | |
84 | MAC_WXHWND(win.MacGetTopLevelWindowRef())); | |
85 | if ( !aglSetDrawable(m_aglContext, drawable) ) | |
86 | { | |
87 | wxLogAGLError("aglSetDrawable"); | |
88 | return false; | |
89 | } | |
90 | ||
91 | if ( !aglSetCurrentContext(m_aglContext) ) | |
92 | { | |
93 | wxLogAGLError("aglSetCurrentContext"); | |
94 | return false; | |
95 | } | |
96 | ||
97 | wx_const_cast(wxGLCanvas&, win).SetViewport(); | |
98 | return true; | |
99 | } | |
100 | ||
101 | // ---------------------------------------------------------------------------- | |
102 | // wxGLCanvas | |
103 | // ---------------------------------------------------------------------------- | |
104 | ||
105 | IMPLEMENT_CLASS(wxGLCanvas, wxWindow) | |
106 | ||
107 | BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow) | |
108 | EVT_SIZE(wxGLCanvas::OnSize) | |
109 | END_EVENT_TABLE() | |
110 | ||
111 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
112 | wxWindowID id, | |
113 | const int *attribList, | |
114 | const wxPoint& pos, | |
115 | const wxSize& size, | |
116 | long style, | |
117 | const wxString& name, | |
118 | const wxPalette& palette) | |
119 | { | |
120 | Create(parent, id, pos, size, style, name, attribList, palette); | |
121 | } | |
122 | ||
123 | #if WXWIN_COMPATIBILITY_2_8 | |
124 | ||
125 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
126 | wxWindowID id, | |
127 | const wxPoint& pos, | |
128 | const wxSize& size, | |
129 | long style, | |
130 | const wxString& name, | |
131 | const int *attribList, | |
132 | const wxPalette& palette) | |
133 | { | |
134 | if ( Create(parent, id, pos, size, style, name, attribList, palette) ) | |
135 | m_glContext = new wxGLContext(this); | |
136 | } | |
137 | ||
138 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
139 | const wxGLContext *shared, | |
140 | wxWindowID id, | |
141 | const wxPoint& pos, | |
142 | const wxSize& size, | |
143 | long style, | |
144 | const wxString& name, | |
145 | const int *attribList, | |
146 | const wxPalette& palette) | |
147 | { | |
148 | if ( Create(parent, id, pos, size, style, name, attribList, palette) ) | |
149 | m_glContext = new wxGLContext(this, shared); | |
150 | } | |
151 | ||
152 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
153 | const wxGLCanvas *shared, | |
154 | wxWindowID id, | |
155 | const wxPoint& pos, | |
156 | const wxSize& size, | |
157 | long style, | |
158 | const wxString& name, | |
159 | const int *attribList, | |
160 | const wxPalette& palette) | |
161 | { | |
162 | if ( Create(parent, id, pos, size, style, name, attribList, palette) ) | |
163 | m_glContext = new wxGLContext(this, shared ? shared->m_glContext : NULL); | |
164 | } | |
165 | ||
166 | #endif // WXWIN_COMPATIBILITY_2_8 | |
167 | ||
168 | /* static */ | |
169 | bool wxGLCanvasBase::IsExtensionSupported(const char *extension) | |
170 | { | |
171 | // we need a valid context to query for extensions. | |
172 | const GLint defaultAttribs[] = { AGL_RGBA, AGL_DOUBLEBUFFER, AGL_NONE }; | |
173 | AGLPixelFormat fmt = aglChoosePixelFormat(NULL, 0, defaultAttribs); | |
174 | AGLContext ctx = aglCreateContext(fmt, NULL); | |
175 | if ( !ctx ) | |
176 | return false; | |
177 | ||
178 | wxString extensions = wxString::FromAscii(glGetString(GL_EXTENSIONS)); | |
179 | ||
180 | aglDestroyPixelFormat(fmt); | |
181 | aglDestroyContext(ctx); | |
182 | ||
183 | return IsExtensionInList(extensions, extension); | |
184 | } | |
185 | ||
186 | /* static */ | |
187 | bool wxGLCanvas::IsAGLMultiSampleAvailable() | |
188 | { | |
189 | static int s_isMultiSampleAvailable = -1; | |
190 | if ( s_isMultiSampleAvailable == -1 ) | |
191 | s_isMultiSampleAvailable = IsExtensionSupported("GL_ARB_multisample"); | |
192 | ||
193 | return s_isMultiSampleAvailable != 0; | |
194 | } | |
195 | ||
196 | static AGLPixelFormat ChoosePixelFormat(const int *attribList) | |
197 | { | |
198 | GLint data[512]; | |
199 | const GLint defaultAttribs[] = | |
200 | { | |
201 | AGL_RGBA, | |
202 | AGL_DOUBLEBUFFER, | |
203 | AGL_MINIMUM_POLICY, // never choose less than requested | |
204 | AGL_DEPTH_SIZE, 1, // use largest available depth buffer | |
205 | AGL_RED_SIZE, 1, | |
206 | AGL_GREEN_SIZE, 1, | |
207 | AGL_BLUE_SIZE, 1, | |
208 | AGL_ALPHA_SIZE, 0, | |
209 | AGL_NONE | |
210 | }; | |
211 | ||
212 | const GLint *attribs; | |
213 | if ( !attribList ) | |
214 | { | |
215 | attribs = defaultAttribs; | |
216 | } | |
217 | else | |
218 | { | |
219 | unsigned p = 0; | |
220 | data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX | |
221 | ||
222 | for ( unsigned arg = 0; attribList[arg] !=0 && p < WXSIZEOF(data); ) | |
223 | { | |
224 | switch ( attribList[arg++] ) | |
225 | { | |
226 | case WX_GL_RGBA: | |
227 | data[p++] = AGL_RGBA; | |
228 | break; | |
229 | ||
230 | case WX_GL_BUFFER_SIZE: | |
231 | data[p++] = AGL_BUFFER_SIZE; | |
232 | data[p++] = attribList[arg++]; | |
233 | break; | |
234 | ||
235 | case WX_GL_LEVEL: | |
236 | data[p++]=AGL_LEVEL; | |
237 | data[p++]=attribList[arg++]; | |
238 | break; | |
239 | ||
240 | case WX_GL_DOUBLEBUFFER: | |
241 | data[p++] = AGL_DOUBLEBUFFER; | |
242 | break; | |
243 | ||
244 | case WX_GL_STEREO: | |
245 | data[p++] = AGL_STEREO; | |
246 | break; | |
247 | ||
248 | case WX_GL_AUX_BUFFERS: | |
249 | data[p++] = AGL_AUX_BUFFERS; | |
250 | data[p++] = attribList[arg++]; | |
251 | break; | |
252 | ||
253 | case WX_GL_MIN_RED: | |
254 | data[p++] = AGL_RED_SIZE; | |
255 | data[p++] = attribList[arg++]; | |
256 | break; | |
257 | ||
258 | case WX_GL_MIN_GREEN: | |
259 | data[p++] = AGL_GREEN_SIZE; | |
260 | data[p++] = attribList[arg++]; | |
261 | break; | |
262 | ||
263 | case WX_GL_MIN_BLUE: | |
264 | data[p++] = AGL_BLUE_SIZE; | |
265 | data[p++] = attribList[arg++]; | |
266 | break; | |
267 | ||
268 | case WX_GL_MIN_ALPHA: | |
269 | data[p++] = AGL_ALPHA_SIZE; | |
270 | data[p++] = attribList[arg++]; | |
271 | break; | |
272 | ||
273 | case WX_GL_DEPTH_SIZE: | |
274 | data[p++] = AGL_DEPTH_SIZE; | |
275 | data[p++] = attribList[arg++]; | |
276 | break; | |
277 | ||
278 | case WX_GL_STENCIL_SIZE: | |
279 | data[p++] = AGL_STENCIL_SIZE; | |
280 | data[p++] = attribList[arg++]; | |
281 | break; | |
282 | ||
283 | case WX_GL_MIN_ACCUM_RED: | |
284 | data[p++] = AGL_ACCUM_RED_SIZE; | |
285 | data[p++] = attribList[arg++]; | |
286 | break; | |
287 | ||
288 | case WX_GL_MIN_ACCUM_GREEN: | |
289 | data[p++] = AGL_ACCUM_GREEN_SIZE; | |
290 | data[p++] = attribList[arg++]; | |
291 | break; | |
292 | ||
293 | case WX_GL_MIN_ACCUM_BLUE: | |
294 | data[p++] = AGL_ACCUM_BLUE_SIZE; | |
295 | data[p++] = attribList[arg++]; | |
296 | break; | |
297 | ||
298 | case WX_GL_MIN_ACCUM_ALPHA: | |
299 | data[p++] = AGL_ACCUM_ALPHA_SIZE; | |
300 | data[p++] = attribList[arg++]; | |
301 | break; | |
302 | ||
303 | case WX_GL_SAMPLE_BUFFERS: | |
304 | if ( !wxGLCanvas::IsAGLMultiSampleAvailable() ) | |
305 | { | |
306 | if ( !attribList[arg++] ) | |
307 | break; | |
308 | ||
309 | return false; | |
310 | } | |
311 | ||
312 | data[p++] = AGL_SAMPLE_BUFFERS_ARB; | |
313 | if ( (data[p++] = attribList[arg++]) == true ) | |
314 | { | |
315 | // don't use software fallback | |
316 | data[p++] = AGL_NO_RECOVERY; | |
317 | } | |
318 | break; | |
319 | ||
320 | case WX_GL_SAMPLES: | |
321 | if ( !wxGLCanvas::IsAGLMultiSampleAvailable() ) | |
322 | { | |
323 | if ( !attribList[arg++] ) | |
324 | break; | |
325 | ||
326 | return false; | |
327 | } | |
328 | ||
329 | data[p++] = AGL_SAMPLES_ARB; | |
330 | data[p++] = attribList[arg++]; | |
331 | break; | |
332 | } | |
333 | } | |
334 | ||
335 | data[p] = AGL_NONE; | |
336 | ||
337 | attribs = data; | |
338 | } | |
339 | ||
340 | return aglChoosePixelFormat(NULL, 0, attribs); | |
341 | } | |
342 | ||
343 | bool wxGLCanvas::Create(wxWindow *parent, | |
344 | wxWindowID id, | |
345 | const wxPoint& pos, | |
346 | const wxSize& size, | |
347 | long style, | |
348 | const wxString& name, | |
349 | const int *attribList, | |
350 | const wxPalette& WXUNUSED(palette)) | |
351 | { | |
352 | m_needsUpdate = false; | |
353 | m_macCanvasIsShown = false; | |
354 | ||
355 | m_aglFormat = ChoosePixelFormat(attribList); | |
356 | if ( !m_aglFormat ) | |
357 | return false; | |
358 | ||
359 | if ( !wxWindow::Create(parent, id, pos, size, style, name) ) | |
360 | return false; | |
361 | ||
362 | m_macCanvasIsShown = true; | |
363 | ||
364 | return true; | |
365 | } | |
366 | ||
367 | wxGLCanvas::~wxGLCanvas() | |
368 | { | |
369 | if ( m_aglFormat ) | |
370 | aglDestroyPixelFormat(m_aglFormat); | |
371 | } | |
372 | ||
373 | /* static */ | |
374 | bool wxGLCanvasBase::IsDisplaySupported(const int *attribList) | |
375 | { | |
376 | AGLPixelFormat aglFormat = ChoosePixelFormat(attribList); | |
377 | ||
378 | if ( !aglFormat ) | |
379 | return false; | |
380 | ||
381 | aglDestroyPixelFormat(aglFormat); | |
382 | ||
383 | return true; | |
384 | } | |
385 | ||
386 | bool wxGLCanvas::SwapBuffers() | |
387 | { | |
388 | AGLContext context = aglGetCurrentContext(); | |
389 | wxCHECK_MSG(context, false, _T("should have current context")); | |
390 | ||
391 | aglSwapBuffers(context); | |
392 | return true; | |
393 | } | |
394 | ||
395 | void wxGLCanvas::SetViewport() | |
396 | { | |
397 | if ( !m_needsUpdate ) | |
398 | return; | |
399 | ||
400 | m_needsUpdate = false; | |
401 | ||
402 | AGLContext context = aglGetCurrentContext(); | |
403 | if ( !context ) | |
404 | return; | |
405 | ||
406 | // viewport is initially set to entire port, adjust it to just this window | |
407 | int x = 0, | |
408 | y = 0; | |
409 | MacClientToRootWindow(&x , &y); | |
410 | ||
411 | int width, height; | |
412 | GetClientSize(&width, &height); | |
413 | ||
414 | Rect bounds; | |
415 | GetWindowPortBounds(MAC_WXHWND(MacGetTopLevelWindowRef()) , &bounds); | |
416 | ||
417 | #if 0 | |
418 | // TODO in case we adopt point vs pixel coordinates, this will make the conversion | |
419 | HIRect hiRect = CGRectMake( x, y, width, height ); | |
420 | HIRectConvert( &hiRect, kHICoordSpace72DPIGlobal, NULL, kHICoordSpaceScreenPixel, NULL); | |
421 | HIRect hiBounds = CGRectMake( 0, 0, bounds.right - bounds.left , bounds.bottom - bounds.top ); | |
422 | HIRectConvert( &hiBounds, kHICoordSpace72DPIGlobal, NULL, kHICoordSpaceScreenPixel, NULL); | |
423 | GLint parms[4]; | |
424 | parms[0] = hiRect.origin.x; | |
425 | parms[1] = hiBounds.size.height - (hiRect.origin.y + hiRect.size.height); | |
426 | parms[2] = hiRect.size.width; | |
427 | parms[3] = hiRect.size.height; | |
428 | #else | |
429 | GLint parms[4]; | |
430 | parms[0] = x; | |
431 | parms[1] = bounds.bottom - bounds.top - ( y + height ); | |
432 | parms[2] = width; | |
433 | parms[3] = height; | |
434 | #endif | |
435 | ||
436 | // move the buffer rect out of sight if we're hidden | |
437 | if ( !m_macCanvasIsShown ) | |
438 | parms[0] += 20000; | |
439 | ||
440 | if ( !aglSetInteger(context, AGL_BUFFER_RECT, parms) ) | |
441 | wxLogAGLError("aglSetInteger(AGL_BUFFER_RECT)"); | |
442 | ||
443 | if ( !aglEnable(context, AGL_BUFFER_RECT) ) | |
444 | wxLogAGLError("aglEnable(AGL_BUFFER_RECT)"); | |
445 | ||
446 | if ( !aglUpdateContext(context) ) | |
447 | wxLogAGLError("aglUpdateContext"); | |
448 | } | |
449 | ||
450 | void wxGLCanvas::OnSize(wxSizeEvent& event) | |
451 | { | |
452 | MacUpdateView(); | |
453 | event.Skip(); | |
454 | } | |
455 | ||
456 | void wxGLCanvas::MacUpdateView() | |
457 | { | |
458 | m_needsUpdate = true; | |
459 | Refresh(false); | |
460 | } | |
461 | ||
462 | void wxGLCanvas::MacSuperChangedPosition() | |
463 | { | |
464 | MacUpdateView(); | |
465 | wxWindow::MacSuperChangedPosition(); | |
466 | } | |
467 | ||
468 | void wxGLCanvas::MacTopLevelWindowChangedPosition() | |
469 | { | |
470 | MacUpdateView(); | |
471 | wxWindow::MacTopLevelWindowChangedPosition(); | |
472 | } | |
473 | ||
474 | void wxGLCanvas::MacVisibilityChanged() | |
475 | { | |
476 | if ( IsShownOnScreen() != m_macCanvasIsShown ) | |
477 | { | |
478 | m_macCanvasIsShown = !m_macCanvasIsShown; | |
479 | MacUpdateView(); | |
480 | } | |
481 | ||
482 | wxWindowMac::MacVisibilityChanged(); | |
483 | } | |
484 | ||
485 | // ---------------------------------------------------------------------------- | |
486 | // wxGLApp | |
487 | // ---------------------------------------------------------------------------- | |
488 | ||
489 | bool wxGLApp::InitGLVisual(const int *attribList) | |
490 | { | |
491 | AGLPixelFormat fmt = ChoosePixelFormat(attribList); | |
492 | if ( !fmt ) | |
493 | return false; | |
494 | ||
495 | aglDestroyPixelFormat(fmt); | |
496 | return true; | |
497 | } | |
498 | ||
499 | #endif // wxUSE_GLCANVAS |