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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 | #include <AGL/agl.h> | |
40 | ||
41 | // ---------------------------------------------------------------------------- | |
42 | // helper functions | |
43 | // ---------------------------------------------------------------------------- | |
44 | ||
45 | static void wxLogAGLError(const char *func) | |
46 | { | |
47 | const int err = aglGetError(); | |
48 | ||
49 | wxLogError(_("OpenGL function \"%s\" failed: %s (error %d)"), | |
50 | func, aglErrorString(err), err); | |
51 | } | |
52 | ||
53 | // ============================================================================ | |
54 | // implementation | |
55 | // ============================================================================ | |
56 | ||
57 | // ---------------------------------------------------------------------------- | |
58 | // low level implementation routines | |
59 | // ---------------------------------------------------------------------------- | |
60 | ||
61 | WXGLContext WXGLCreateContext( WXGLPixelFormat pixelFormat, WXGLContext shareContext ) | |
62 | { | |
63 | WXGLContext context = aglCreateContext(pixelFormat, shareContext); | |
64 | if ( !context ) | |
65 | wxLogAGLError("aglCreateContext"); | |
66 | return context ; | |
67 | } | |
68 | ||
69 | void WXGLDestroyContext( WXGLContext context ) | |
70 | { | |
71 | if ( context ) | |
72 | { | |
73 | if ( !aglDestroyContext(context) ) | |
74 | { | |
75 | wxLogAGLError("aglDestroyContext"); | |
76 | } | |
77 | } | |
78 | } | |
79 | ||
80 | WXGLContext WXGLGetCurrentContext() | |
81 | { | |
82 | return aglGetCurrentContext(); | |
83 | } | |
84 | ||
85 | bool WXGLSetCurrentContext(WXGLContext context) | |
86 | { | |
87 | if ( !aglSetCurrentContext(context) ) | |
88 | { | |
89 | wxLogAGLError("aglSetCurrentContext"); | |
90 | return false; | |
91 | } | |
92 | ||
93 | return true; | |
94 | } | |
95 | ||
96 | void WXGLDestroyPixelFormat( WXGLPixelFormat pixelFormat ) | |
97 | { | |
98 | if ( pixelFormat ) | |
99 | { | |
100 | aglDestroyPixelFormat(pixelFormat); | |
101 | } | |
102 | } | |
103 | ||
104 | WXGLPixelFormat WXGLChoosePixelFormat(const int *attribList) | |
105 | { | |
106 | GLint data[512]; | |
107 | const GLint defaultAttribs[] = | |
108 | { | |
109 | AGL_RGBA, | |
110 | AGL_DOUBLEBUFFER, | |
111 | AGL_MINIMUM_POLICY, // never choose less than requested | |
112 | AGL_DEPTH_SIZE, 1, // use largest available depth buffer | |
113 | AGL_RED_SIZE, 1, | |
114 | AGL_GREEN_SIZE, 1, | |
115 | AGL_BLUE_SIZE, 1, | |
116 | AGL_ALPHA_SIZE, 0, | |
117 | AGL_NONE | |
118 | }; | |
119 | ||
120 | const GLint *attribs; | |
121 | if ( !attribList ) | |
122 | { | |
123 | attribs = defaultAttribs; | |
124 | } | |
125 | else | |
126 | { | |
127 | unsigned p = 0; | |
128 | data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX | |
129 | ||
130 | for ( unsigned arg = 0; attribList[arg] !=0 && p < WXSIZEOF(data); ) | |
131 | { | |
132 | switch ( attribList[arg++] ) | |
133 | { | |
134 | case WX_GL_RGBA: | |
135 | data[p++] = AGL_RGBA; | |
136 | break; | |
137 | ||
138 | case WX_GL_BUFFER_SIZE: | |
139 | data[p++] = AGL_BUFFER_SIZE; | |
140 | data[p++] = attribList[arg++]; | |
141 | break; | |
142 | ||
143 | case WX_GL_LEVEL: | |
144 | data[p++]=AGL_LEVEL; | |
145 | data[p++]=attribList[arg++]; | |
146 | break; | |
147 | ||
148 | case WX_GL_DOUBLEBUFFER: | |
149 | data[p++] = AGL_DOUBLEBUFFER; | |
150 | break; | |
151 | ||
152 | case WX_GL_STEREO: | |
153 | data[p++] = AGL_STEREO; | |
154 | break; | |
155 | ||
156 | case WX_GL_AUX_BUFFERS: | |
157 | data[p++] = AGL_AUX_BUFFERS; | |
158 | data[p++] = attribList[arg++]; | |
159 | break; | |
160 | ||
161 | case WX_GL_MIN_RED: | |
162 | data[p++] = AGL_RED_SIZE; | |
163 | data[p++] = attribList[arg++]; | |
164 | break; | |
165 | ||
166 | case WX_GL_MIN_GREEN: | |
167 | data[p++] = AGL_GREEN_SIZE; | |
168 | data[p++] = attribList[arg++]; | |
169 | break; | |
170 | ||
171 | case WX_GL_MIN_BLUE: | |
172 | data[p++] = AGL_BLUE_SIZE; | |
173 | data[p++] = attribList[arg++]; | |
174 | break; | |
175 | ||
176 | case WX_GL_MIN_ALPHA: | |
177 | data[p++] = AGL_ALPHA_SIZE; | |
178 | data[p++] = attribList[arg++]; | |
179 | break; | |
180 | ||
181 | case WX_GL_DEPTH_SIZE: | |
182 | data[p++] = AGL_DEPTH_SIZE; | |
183 | data[p++] = attribList[arg++]; | |
184 | break; | |
185 | ||
186 | case WX_GL_STENCIL_SIZE: | |
187 | data[p++] = AGL_STENCIL_SIZE; | |
188 | data[p++] = attribList[arg++]; | |
189 | break; | |
190 | ||
191 | case WX_GL_MIN_ACCUM_RED: | |
192 | data[p++] = AGL_ACCUM_RED_SIZE; | |
193 | data[p++] = attribList[arg++]; | |
194 | break; | |
195 | ||
196 | case WX_GL_MIN_ACCUM_GREEN: | |
197 | data[p++] = AGL_ACCUM_GREEN_SIZE; | |
198 | data[p++] = attribList[arg++]; | |
199 | break; | |
200 | ||
201 | case WX_GL_MIN_ACCUM_BLUE: | |
202 | data[p++] = AGL_ACCUM_BLUE_SIZE; | |
203 | data[p++] = attribList[arg++]; | |
204 | break; | |
205 | ||
206 | case WX_GL_MIN_ACCUM_ALPHA: | |
207 | data[p++] = AGL_ACCUM_ALPHA_SIZE; | |
208 | data[p++] = attribList[arg++]; | |
209 | break; | |
210 | ||
211 | case WX_GL_SAMPLE_BUFFERS: | |
212 | if ( !wxGLCanvas::IsAGLMultiSampleAvailable() ) | |
213 | { | |
214 | if ( !attribList[arg++] ) | |
215 | break; | |
216 | ||
217 | return false; | |
218 | } | |
219 | ||
220 | data[p++] = AGL_SAMPLE_BUFFERS_ARB; | |
221 | if ( (data[p++] = attribList[arg++]) == true ) | |
222 | { | |
223 | // don't use software fallback | |
224 | data[p++] = AGL_NO_RECOVERY; | |
225 | } | |
226 | break; | |
227 | ||
228 | case WX_GL_SAMPLES: | |
229 | if ( !wxGLCanvas::IsAGLMultiSampleAvailable() ) | |
230 | { | |
231 | if ( !attribList[arg++] ) | |
232 | break; | |
233 | ||
234 | return false; | |
235 | } | |
236 | ||
237 | data[p++] = AGL_SAMPLES_ARB; | |
238 | data[p++] = attribList[arg++]; | |
239 | break; | |
240 | } | |
241 | } | |
242 | ||
243 | data[p] = AGL_NONE; | |
244 | ||
245 | attribs = data; | |
246 | } | |
247 | ||
248 | return aglChoosePixelFormat(NULL, 0, attribs); | |
249 | } | |
250 | ||
251 | // ---------------------------------------------------------------------------- | |
252 | // wxGLContext | |
253 | // ---------------------------------------------------------------------------- | |
254 | ||
255 | bool wxGLContext::SetCurrent(const wxGLCanvas& win) const | |
256 | { | |
257 | if ( !m_glContext ) | |
258 | return false; | |
259 | ||
260 | AGLDrawable drawable = (AGLDrawable)GetWindowPort( | |
261 | MAC_WXHWND(win.MacGetTopLevelWindowRef())); | |
262 | ||
263 | GLint bufnummer = win.GetAglBufferName(); | |
264 | aglSetInteger(m_glContext, AGL_BUFFER_NAME, &bufnummer); | |
265 | //win.SetLastContext(m_glContext); | |
266 | ||
267 | const_cast<wxGLCanvas&>(win).SetViewport(); | |
268 | ||
269 | if ( !aglSetDrawable(m_glContext, drawable) ) | |
270 | { | |
271 | wxLogAGLError("aglSetDrawable"); | |
272 | return false; | |
273 | } | |
274 | ||
275 | return WXGLSetCurrentContext(m_glContext); | |
276 | } | |
277 | ||
278 | // ---------------------------------------------------------------------------- | |
279 | // wxGLCanvas | |
280 | // ---------------------------------------------------------------------------- | |
281 | ||
282 | /* | |
283 | ||
284 | sharing contexts under AGL is not straightforward, to quote from | |
285 | ||
286 | http://lists.apple.com/archives/mac-opengl/2003/Jan/msg00402.html : | |
287 | ||
288 | In Carbon OpenGL (AGL) you would use call aglSetInteger to setup a | |
289 | buffer name and attached each context to that same name. From AGL | |
290 | you can do: | |
291 | ||
292 | GLint id = 1; | |
293 | ||
294 | ctx1 = aglCreateContext... | |
295 | aglSetInteger(ctx1, AGL_BUFFER_NAME, &id); // create name | |
296 | aglAttachDrawable (ctx1,...); // create surface with associated with | |
297 | name (first time) | |
298 | ctx2 = aglCreateContext... | |
299 | aglSetInteger(ctx2, AGL_BUFFER_NAME, &id); // uses previously created name | |
300 | aglAttachDrawable (ctx2, ...); // uses existing surface with existing name | |
301 | ||
302 | AGL Docs say: | |
303 | AGL_BUFFER_NAME | |
304 | params contains one value: a non-negative integer name of the surface to be | |
305 | associated to be with the current context. If this value is non-zero, and a | |
306 | surface of this name is not associated to this drawable, a new surface with | |
307 | this name is created and associated with the context when | |
308 | aglSetDrawable is called subsequently. If this is a previously allocated | |
309 | buffer name within the namespace of the current window (e.g., drawable), | |
310 | that previously allocated surface is associated with the context (e.g., no | |
311 | new surface is created) and the subsequent call to aglSetDrawable will | |
312 | attach that surface. This allows multiple contexts to be attached to a single | |
313 | surface. Using the default buffer name zero, returns to one surface per | |
314 | context behavior. | |
315 | */ | |
316 | ||
317 | /* | |
318 | so what I'm doing is to have a dummy aglContext attached to a wxGLCanvas, | |
319 | assign it a buffer number | |
320 | */ | |
321 | ||
322 | ||
323 | bool wxGLCanvas::Create(wxWindow *parent, | |
324 | wxWindowID id, | |
325 | const wxPoint& pos, | |
326 | const wxSize& size, | |
327 | long style, | |
328 | const wxString& name, | |
329 | const int *attribList, | |
330 | const wxPalette& WXUNUSED(palette)) | |
331 | { | |
332 | m_needsUpdate = false; | |
333 | m_macCanvasIsShown = false; | |
334 | ||
335 | m_glFormat = WXGLChoosePixelFormat(attribList); | |
336 | if ( !m_glFormat ) | |
337 | return false; | |
338 | ||
339 | if ( !wxWindow::Create(parent, id, pos, size, style, name) ) | |
340 | return false; | |
341 | ||
342 | m_dummyContext = WXGLCreateContext(m_glFormat, NULL); | |
343 | ||
344 | static GLint gCurrentBufferName = 1; | |
345 | m_bufferName = gCurrentBufferName++; | |
346 | aglSetInteger (m_dummyContext, AGL_BUFFER_NAME, &m_bufferName); | |
347 | ||
348 | AGLDrawable drawable = (AGLDrawable)GetWindowPort(MAC_WXHWND(MacGetTopLevelWindowRef())); | |
349 | aglSetDrawable(m_dummyContext, drawable); | |
350 | ||
351 | m_macCanvasIsShown = true; | |
352 | ||
353 | return true; | |
354 | } | |
355 | ||
356 | wxGLCanvas::~wxGLCanvas() | |
357 | { | |
358 | if ( m_glFormat ) | |
359 | WXGLDestroyPixelFormat(m_glFormat); | |
360 | ||
361 | if ( m_dummyContext ) | |
362 | WXGLDestroyContext(m_dummyContext); | |
363 | } | |
364 | ||
365 | bool wxGLCanvas::SwapBuffers() | |
366 | { | |
367 | WXGLContext context = WXGLGetCurrentContext(); | |
368 | wxCHECK_MSG(context, false, wxT("should have current context")); | |
369 | ||
370 | aglSwapBuffers(context); | |
371 | return true; | |
372 | } | |
373 | ||
374 | void wxGLCanvas::SetViewport() | |
375 | { | |
376 | if ( !m_needsUpdate ) | |
377 | return; | |
378 | ||
379 | m_needsUpdate = false; | |
380 | ||
381 | // AGLContext context = aglGetCurrentContext(); | |
382 | // if ( !context ) | |
383 | // return; | |
384 | ||
385 | // viewport is initially set to entire port, adjust it to just this window | |
386 | int x = 0, | |
387 | y = 0; | |
388 | MacClientToRootWindow(&x , &y); | |
389 | ||
390 | int width, height; | |
391 | GetClientSize(&width, &height); | |
392 | ||
393 | Rect bounds; | |
394 | GetWindowPortBounds(MAC_WXHWND(MacGetTopLevelWindowRef()) , &bounds); | |
395 | ||
396 | GLint parms[4]; | |
397 | parms[0] = x; | |
398 | parms[1] = bounds.bottom - bounds.top - ( y + height ); | |
399 | parms[2] = width; | |
400 | parms[3] = height; | |
401 | ||
402 | // move the buffer rect out of sight if we're hidden | |
403 | if ( !m_macCanvasIsShown ) | |
404 | parms[0] += 20000; | |
405 | ||
406 | if ( !aglSetInteger(m_dummyContext, AGL_BUFFER_RECT, parms) ) | |
407 | wxLogAGLError("aglSetInteger(AGL_BUFFER_RECT)"); | |
408 | ||
409 | if ( !aglEnable(m_dummyContext, AGL_BUFFER_RECT) ) | |
410 | wxLogAGLError("aglEnable(AGL_BUFFER_RECT)"); | |
411 | ||
412 | if ( !aglUpdateContext(m_dummyContext) ) | |
413 | wxLogAGLError("aglUpdateContext"); | |
414 | } | |
415 | ||
416 | void wxGLCanvas::OnSize(wxSizeEvent& event) | |
417 | { | |
418 | MacUpdateView(); | |
419 | event.Skip(); | |
420 | } | |
421 | ||
422 | void wxGLCanvas::MacUpdateView() | |
423 | { | |
424 | m_needsUpdate = true; | |
425 | Refresh(false); | |
426 | } | |
427 | ||
428 | void wxGLCanvas::MacSuperChangedPosition() | |
429 | { | |
430 | MacUpdateView(); | |
431 | SetViewport(); | |
432 | wxWindow::MacSuperChangedPosition(); | |
433 | } | |
434 | ||
435 | void wxGLCanvas::MacTopLevelWindowChangedPosition() | |
436 | { | |
437 | MacUpdateView(); | |
438 | wxWindow::MacTopLevelWindowChangedPosition(); | |
439 | } | |
440 | ||
441 | void wxGLCanvas::MacVisibilityChanged() | |
442 | { | |
443 | if ( IsShownOnScreen() != m_macCanvasIsShown ) | |
444 | { | |
445 | m_macCanvasIsShown = !m_macCanvasIsShown; | |
446 | MacUpdateView(); | |
447 | } | |
448 | ||
449 | wxWindowMac::MacVisibilityChanged(); | |
450 | } | |
451 | ||
452 | #endif // wxUSE_GLCANVAS |