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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/mac/uma.h" | |
37 | ||
38 | #include "wx/mac/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 | void wxGLContext::SetCurrent(const wxGLCanvas& win) const | |
79 | { | |
80 | if ( !m_aglContext ) | |
81 | return; | |
82 | ||
83 | AGLDrawable drawable = (AGLDrawable)GetWindowPort( | |
84 | MAC_WXHWND(win.MacGetTopLevelWindowRef())); | |
85 | if ( !aglSetDrawable(m_aglContext, drawable) ) | |
86 | wxLogAGLError("aglSetDrawable"); | |
87 | ||
88 | if ( !aglSetCurrentContext(m_aglContext) ) | |
89 | wxLogAGLError("aglSetCurrentContext"); | |
90 | ||
91 | wx_const_cast(wxGLCanvas&, win).SetViewport(); | |
92 | } | |
93 | ||
94 | // ---------------------------------------------------------------------------- | |
95 | // wxGLCanvas | |
96 | // ---------------------------------------------------------------------------- | |
97 | ||
98 | IMPLEMENT_CLASS(wxGLCanvas, wxWindow) | |
99 | ||
100 | BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow) | |
101 | EVT_SIZE(wxGLCanvas::OnSize) | |
102 | END_EVENT_TABLE() | |
103 | ||
104 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
105 | wxWindowID id, | |
106 | const int *attribList, | |
107 | const wxPoint& pos, | |
108 | const wxSize& size, | |
109 | long style, | |
110 | const wxString& name, | |
111 | const wxPalette& palette) | |
112 | { | |
113 | Create(parent, id, pos, size, style, name, attribList, palette); | |
114 | } | |
115 | ||
116 | #if WXWIN_COMPATIBILITY_2_8 | |
117 | ||
118 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
119 | wxWindowID id, | |
120 | const wxPoint& pos, | |
121 | const wxSize& size, | |
122 | long style, | |
123 | const wxString& name, | |
124 | const int *attribList, | |
125 | const wxPalette& palette) | |
126 | { | |
127 | if ( Create(parent, id, pos, size, style, name, attribList, palette) ) | |
128 | m_glContext = new wxGLContext(this); | |
129 | } | |
130 | ||
131 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
132 | const wxGLContext *shared, | |
133 | wxWindowID id, | |
134 | const wxPoint& pos, | |
135 | const wxSize& size, | |
136 | long style, | |
137 | const wxString& name, | |
138 | const int *attribList, | |
139 | const wxPalette& palette) | |
140 | { | |
141 | if ( Create(parent, id, pos, size, style, name, attribList, palette) ) | |
142 | m_glContext = new wxGLContext(this, shared); | |
143 | } | |
144 | ||
145 | wxGLCanvas::wxGLCanvas(wxWindow *parent, | |
146 | const wxGLCanvas *shared, | |
147 | wxWindowID id, | |
148 | const wxPoint& pos, | |
149 | const wxSize& size, | |
150 | long style, | |
151 | const wxString& name, | |
152 | const int *attribList, | |
153 | const wxPalette& palette) | |
154 | { | |
155 | if ( Create(parent, id, pos, size, style, name, attribList, palette) ) | |
156 | m_glContext = new wxGLContext(this, shared ? shared->m_glContext : NULL); | |
157 | } | |
158 | ||
159 | #endif // WXWIN_COMPATIBILITY_2_8 | |
160 | ||
161 | static AGLPixelFormat ChoosePixelFormat(const int *attribList) | |
162 | { | |
163 | GLint data[512]; | |
164 | const GLint defaultAttribs[] = | |
165 | { | |
166 | AGL_RGBA, | |
167 | AGL_DOUBLEBUFFER, | |
168 | AGL_MINIMUM_POLICY, // never choose less than requested | |
169 | AGL_DEPTH_SIZE, 1, // use largest available depth buffer | |
170 | AGL_RED_SIZE, 1, | |
171 | AGL_GREEN_SIZE, 1, | |
172 | AGL_BLUE_SIZE, 1, | |
173 | AGL_ALPHA_SIZE, 0, | |
174 | AGL_NONE | |
175 | }; | |
176 | ||
177 | const GLint *attribs; | |
178 | if ( !attribList ) | |
179 | { | |
180 | attribs = defaultAttribs; | |
181 | } | |
182 | else | |
183 | { | |
184 | unsigned p = 0; | |
185 | data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX | |
186 | ||
187 | for ( unsigned arg = 0; attribList[arg] !=0 && p < WXSIZEOF(data); ) | |
188 | { | |
189 | switch ( attribList[arg++] ) | |
190 | { | |
191 | case WX_GL_RGBA: | |
192 | data[p++] = AGL_RGBA; | |
193 | break; | |
194 | ||
195 | case WX_GL_BUFFER_SIZE: | |
196 | data[p++] = AGL_BUFFER_SIZE; | |
197 | data[p++] = attribList[arg++]; | |
198 | break; | |
199 | ||
200 | case WX_GL_LEVEL: | |
201 | data[p++]=AGL_LEVEL; | |
202 | data[p++]=attribList[arg++]; | |
203 | break; | |
204 | ||
205 | case WX_GL_DOUBLEBUFFER: | |
206 | data[p++] = AGL_DOUBLEBUFFER; | |
207 | break; | |
208 | ||
209 | case WX_GL_STEREO: | |
210 | data[p++] = AGL_STEREO; | |
211 | break; | |
212 | ||
213 | case WX_GL_AUX_BUFFERS: | |
214 | data[p++] = AGL_AUX_BUFFERS; | |
215 | data[p++] = attribList[arg++]; | |
216 | break; | |
217 | ||
218 | case WX_GL_MIN_RED: | |
219 | data[p++] = AGL_RED_SIZE; | |
220 | data[p++] = attribList[arg++]; | |
221 | break; | |
222 | ||
223 | case WX_GL_MIN_GREEN: | |
224 | data[p++] = AGL_GREEN_SIZE; | |
225 | data[p++] = attribList[arg++]; | |
226 | break; | |
227 | ||
228 | case WX_GL_MIN_BLUE: | |
229 | data[p++] = AGL_BLUE_SIZE; | |
230 | data[p++] = attribList[arg++]; | |
231 | break; | |
232 | ||
233 | case WX_GL_MIN_ALPHA: | |
234 | data[p++] = AGL_ALPHA_SIZE; | |
235 | data[p++] = attribList[arg++]; | |
236 | break; | |
237 | ||
238 | case WX_GL_DEPTH_SIZE: | |
239 | data[p++] = AGL_DEPTH_SIZE; | |
240 | data[p++] = attribList[arg++]; | |
241 | break; | |
242 | ||
243 | case WX_GL_STENCIL_SIZE: | |
244 | data[p++] = AGL_STENCIL_SIZE; | |
245 | data[p++] = attribList[arg++]; | |
246 | break; | |
247 | ||
248 | case WX_GL_MIN_ACCUM_RED: | |
249 | data[p++] = AGL_ACCUM_RED_SIZE; | |
250 | data[p++] = attribList[arg++]; | |
251 | break; | |
252 | ||
253 | case WX_GL_MIN_ACCUM_GREEN: | |
254 | data[p++] = AGL_ACCUM_GREEN_SIZE; | |
255 | data[p++] = attribList[arg++]; | |
256 | break; | |
257 | ||
258 | case WX_GL_MIN_ACCUM_BLUE: | |
259 | data[p++] = AGL_ACCUM_BLUE_SIZE; | |
260 | data[p++] = attribList[arg++]; | |
261 | break; | |
262 | ||
263 | case WX_GL_MIN_ACCUM_ALPHA: | |
264 | data[p++] = AGL_ACCUM_ALPHA_SIZE; | |
265 | data[p++] = attribList[arg++]; | |
266 | break; | |
267 | } | |
268 | } | |
269 | ||
270 | data[p] = AGL_NONE; | |
271 | ||
272 | attribs = data; | |
273 | } | |
274 | ||
275 | return aglChoosePixelFormat(NULL, 0, attribs); | |
276 | } | |
277 | ||
278 | bool wxGLCanvas::Create(wxWindow *parent, | |
279 | wxWindowID id, | |
280 | const wxPoint& pos, | |
281 | const wxSize& size, | |
282 | long style, | |
283 | const wxString& name, | |
284 | const int *attribList, | |
285 | const wxPalette& WXUNUSED(palette)) | |
286 | { | |
287 | m_needsUpdate = false; | |
288 | m_macCanvasIsShown = false; | |
289 | ||
290 | m_aglFormat = ChoosePixelFormat(attribList); | |
291 | if ( !m_aglFormat ) | |
292 | return false; | |
293 | ||
294 | if ( !wxWindow::Create(parent, id, pos, size, style, name) ) | |
295 | return false; | |
296 | ||
297 | m_macCanvasIsShown = true; | |
298 | ||
299 | return true; | |
300 | } | |
301 | ||
302 | wxGLCanvas::~wxGLCanvas() | |
303 | { | |
304 | if ( m_aglFormat ) | |
305 | aglDestroyPixelFormat(m_aglFormat); | |
306 | } | |
307 | ||
308 | void wxGLCanvas::SwapBuffers() | |
309 | { | |
310 | AGLContext context = aglGetCurrentContext(); | |
311 | wxCHECK_RET( context, _T("should have current context") ); | |
312 | ||
313 | aglSwapBuffers(context); | |
314 | } | |
315 | ||
316 | void wxGLCanvas::SetViewport() | |
317 | { | |
318 | if ( !m_needsUpdate ) | |
319 | return; | |
320 | ||
321 | m_needsUpdate = false; | |
322 | ||
323 | AGLContext context = aglGetCurrentContext(); | |
324 | if ( !context ) | |
325 | return; | |
326 | ||
327 | // viewport is initially set to entire port, adjust it to just this window | |
328 | int x = 0, | |
329 | y = 0; | |
330 | MacClientToRootWindow(&x , &y); | |
331 | ||
332 | int width, height; | |
333 | GetClientSize(&width, &height); | |
334 | ||
335 | Rect bounds; | |
336 | GetWindowPortBounds(MAC_WXHWND(MacGetTopLevelWindowRef()) , &bounds); | |
337 | ||
338 | #if 0 | |
339 | // TODO in case we adopt point vs pixel coordinates, this will make the conversion | |
340 | HIRect hiRect = CGRectMake( x, y, width, height ); | |
341 | HIRectConvert( &hiRect, kHICoordSpace72DPIGlobal, NULL, kHICoordSpaceScreenPixel, NULL); | |
342 | HIRect hiBounds = CGRectMake( 0, 0, bounds.right - bounds.left , bounds.bottom - bounds.top ); | |
343 | HIRectConvert( &hiBounds, kHICoordSpace72DPIGlobal, NULL, kHICoordSpaceScreenPixel, NULL); | |
344 | GLint parms[4]; | |
345 | parms[0] = hiRect.origin.x; | |
346 | parms[1] = hiBounds.size.height - (hiRect.origin.y + hiRect.size.height); | |
347 | parms[2] = hiRect.size.width; | |
348 | parms[3] = hiRect.size.height; | |
349 | #else | |
350 | GLint parms[4]; | |
351 | parms[0] = x; | |
352 | parms[1] = bounds.bottom - bounds.top - ( y + height ); | |
353 | parms[2] = width; | |
354 | parms[3] = height; | |
355 | #endif | |
356 | ||
357 | // move the buffer rect out of sight if we're hidden | |
358 | if ( !m_macCanvasIsShown ) | |
359 | parms[0] += 20000; | |
360 | ||
361 | if ( !aglSetInteger(context, AGL_BUFFER_RECT, parms) ) | |
362 | wxLogAGLError("aglSetInteger(AGL_BUFFER_RECT)"); | |
363 | ||
364 | if ( !aglEnable(context, AGL_BUFFER_RECT) ) | |
365 | wxLogAGLError("aglEnable(AGL_BUFFER_RECT)"); | |
366 | ||
367 | if ( !aglUpdateContext(context) ) | |
368 | wxLogAGLError("aglUpdateContext"); | |
369 | } | |
370 | ||
371 | void wxGLCanvas::OnSize(wxSizeEvent& event) | |
372 | { | |
373 | MacUpdateView(); | |
374 | event.Skip(); | |
375 | } | |
376 | ||
377 | void wxGLCanvas::MacUpdateView() | |
378 | { | |
379 | m_needsUpdate = true; | |
380 | Refresh(false); | |
381 | } | |
382 | ||
383 | void wxGLCanvas::MacSuperChangedPosition() | |
384 | { | |
385 | MacUpdateView(); | |
386 | wxWindow::MacSuperChangedPosition(); | |
387 | } | |
388 | ||
389 | void wxGLCanvas::MacTopLevelWindowChangedPosition() | |
390 | { | |
391 | MacUpdateView(); | |
392 | wxWindow::MacTopLevelWindowChangedPosition(); | |
393 | } | |
394 | ||
395 | void wxGLCanvas::MacVisibilityChanged() | |
396 | { | |
397 | if ( MacIsReallyShown() != m_macCanvasIsShown ) | |
398 | { | |
399 | m_macCanvasIsShown = !m_macCanvasIsShown; | |
400 | MacUpdateView(); | |
401 | } | |
402 | ||
403 | wxWindowMac::MacVisibilityChanged(); | |
404 | } | |
405 | ||
406 | // ---------------------------------------------------------------------------- | |
407 | // wxGLApp | |
408 | // ---------------------------------------------------------------------------- | |
409 | ||
410 | bool wxGLApp::InitGLVisual(const int *attribList) | |
411 | { | |
412 | AGLPixelFormat fmt = ChoosePixelFormat(attribList); | |
413 | if ( !fmt ) | |
414 | return false; | |
415 | ||
416 | aglDestroyPixelFormat(fmt); | |
417 | return true; | |
418 | } | |
419 | ||
420 | #endif // wxUSE_GLCANVAS |