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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // Name: glcanvas.cpp | |
3 | // Purpose: wxGLCanvas, for using OpenGL with wxWindows under Macintosh | |
4 | // Author: AUTHOR | |
5 | // Modified by: | |
6 | // Created: ??/??/98 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) AUTHOR | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | #ifdef __GNUG__ | |
13 | #pragma implementation "glcanvas.h" | |
14 | #endif | |
15 | ||
16 | #include "wx/wxprec.h" | |
17 | ||
18 | #if defined(__BORLANDC__) | |
19 | #pragma hdrstop | |
20 | #endif | |
21 | ||
22 | #include "wx/setup.h" | |
23 | ||
24 | #if wxUSE_GLCANVAS | |
25 | ||
26 | #ifndef WX_PRECOMP | |
27 | #include "wx/frame.h" | |
28 | #endif | |
29 | ||
30 | #include "wx/settings.h" | |
31 | #include "wx/log.h" | |
32 | ||
33 | #include "wx/glcanvas.h" | |
34 | #include "wx/mac/uma.h" | |
35 | ||
0a67a93b SC |
36 | /* |
37 | * GLContext implementation | |
38 | */ | |
39 | ||
40 | wxGLContext::wxGLContext( | |
41 | AGLPixelFormat fmt, wxGLCanvas *win, | |
42 | const wxPalette& palette, | |
43 | const wxGLContext *other /* for sharing display lists */ | |
44 | ) | |
45 | { | |
46 | m_window = win; | |
47 | ||
48 | m_drawable = (AGLDrawable) UMAGetWindowPort(win->GetMacRootWindow()); | |
49 | ||
50 | m_glContext = aglCreateContext(fmt, other ? other->m_glContext : NULL); | |
51 | wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") ); | |
52 | ||
53 | GLboolean b; | |
54 | b = aglSetDrawable(m_glContext, m_drawable); | |
55 | wxCHECK_RET( b, wxT("Couldn't bind OpenGl context") ); | |
56 | aglEnable(m_glContext , AGL_BUFFER_RECT ) ; | |
57 | b = aglSetCurrentContext(m_glContext); | |
58 | wxCHECK_RET( b, wxT("Couldn't activate OpenGl context") ); | |
59 | } | |
60 | ||
61 | wxGLContext::~wxGLContext() | |
62 | { | |
63 | if (m_glContext) | |
64 | { | |
65 | aglSetCurrentContext(NULL); | |
66 | aglDestroyContext(m_glContext); | |
67 | } | |
68 | } | |
69 | ||
70 | void wxGLContext::SwapBuffers() | |
71 | { | |
72 | if (m_glContext) | |
73 | { | |
74 | aglSwapBuffers(m_glContext); | |
75 | } | |
76 | } | |
77 | ||
78 | void wxGLContext::SetCurrent() | |
79 | { | |
80 | if (m_glContext) | |
81 | { | |
82 | aglSetCurrentContext(m_glContext); | |
83 | } | |
84 | } | |
85 | ||
86 | void wxGLContext::Update() | |
87 | { | |
88 | if (m_glContext) | |
89 | { | |
90 | aglUpdateContext(m_glContext); | |
91 | } | |
92 | } | |
93 | ||
94 | void wxGLContext::SetColour(const char *colour) | |
95 | { | |
96 | float r = 0.0; | |
97 | float g = 0.0; | |
98 | float b = 0.0; | |
99 | wxColour *col = wxTheColourDatabase->FindColour(colour); | |
100 | if (col) | |
101 | { | |
102 | r = (float)(col->Red()/256.0); | |
103 | g = (float)(col->Green()/256.0); | |
104 | b = (float)(col->Blue()/256.0); | |
105 | glColor3f( r, g, b); | |
106 | } | |
107 | } | |
108 | ||
109 | ||
110 | /* | |
111 | * wxGLCanvas implementation | |
112 | */ | |
113 | ||
4660d7e5 | 114 | IMPLEMENT_CLASS(wxGLCanvas, wxWindow) |
0a67a93b | 115 | |
4660d7e5 | 116 | BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow) |
0a67a93b SC |
117 | EVT_SIZE(wxGLCanvas::OnSize) |
118 | END_EVENT_TABLE() | |
119 | ||
120 | wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id, | |
121 | const wxPoint& pos, const wxSize& size, long style, const wxString& name, | |
122 | int *attribList, const wxPalette& palette) | |
123 | { | |
124 | Create(parent, NULL, id, pos, size, style, name, attribList, palette); | |
125 | } | |
126 | ||
127 | wxGLCanvas::wxGLCanvas( wxWindow *parent, | |
128 | const wxGLContext *shared, wxWindowID id, | |
129 | const wxPoint& pos, const wxSize& size, long style, const wxString& name, | |
130 | int *attribList, const wxPalette& palette ) | |
131 | { | |
132 | Create(parent, shared, id, pos, size, style, name, attribList, palette); | |
133 | } | |
134 | ||
135 | wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID id, | |
136 | const wxPoint& pos, const wxSize& size, long style, const wxString& name, | |
137 | int *attribList, const wxPalette& palette ) | |
138 | { | |
139 | Create(parent, shared ? shared->GetContext() : NULL, id, pos, size, style, name, attribList, palette); | |
140 | } | |
141 | ||
142 | wxGLCanvas::~wxGLCanvas() | |
143 | { | |
144 | if (m_glContext) | |
145 | delete m_glContext; | |
146 | } | |
147 | ||
16506231 | 148 | static AGLPixelFormat ChoosePixelFormat(const int *attribList) |
0a67a93b | 149 | { |
0a67a93b | 150 | GLint data[512]; |
16506231 | 151 | GLint defaultAttribs[] = { AGL_RGBA, |
0a67a93b SC |
152 | AGL_DOUBLEBUFFER, |
153 | AGL_MINIMUM_POLICY, | |
154 | AGL_DEPTH_SIZE, 1, // use largest available depth buffer | |
155 | AGL_RED_SIZE, 1, | |
156 | AGL_GREEN_SIZE, 1, | |
157 | AGL_BLUE_SIZE, 1, | |
158 | AGL_ALPHA_SIZE, 0, | |
159 | AGL_NONE }; | |
160 | GLint *attribs; | |
161 | if (!attribList) | |
162 | { | |
16506231 | 163 | attribs = defaultAttribs; |
0a67a93b SC |
164 | } |
165 | else | |
166 | { | |
16506231 | 167 | int arg=0, p=0; |
0a67a93b SC |
168 | |
169 | data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX | |
170 | while( (attribList[arg]!=0) && (p<512) ) | |
171 | { | |
172 | switch( attribList[arg++] ) | |
173 | { | |
174 | case WX_GL_RGBA: data[p++] = AGL_RGBA; break; | |
175 | case WX_GL_BUFFER_SIZE: | |
176 | data[p++]=AGL_BUFFER_SIZE; data[p++]=attribList[arg++]; break; | |
177 | case WX_GL_LEVEL: | |
178 | data[p++]=AGL_LEVEL; data[p++]=attribList[arg++]; break; | |
179 | case WX_GL_DOUBLEBUFFER: data[p++] = AGL_DOUBLEBUFFER; break; | |
180 | case WX_GL_STEREO: data[p++] = AGL_STEREO; break; | |
181 | case WX_GL_AUX_BUFFERS: | |
182 | data[p++]=AGL_AUX_BUFFERS; data[p++]=attribList[arg++]; break; | |
183 | case WX_GL_MIN_RED: | |
184 | data[p++]=AGL_RED_SIZE; data[p++]=attribList[arg++]; break; | |
185 | case WX_GL_MIN_GREEN: | |
186 | data[p++]=AGL_GREEN_SIZE; data[p++]=attribList[arg++]; break; | |
187 | case WX_GL_MIN_BLUE: | |
188 | data[p++]=AGL_BLUE_SIZE; data[p++]=attribList[arg++]; break; | |
189 | case WX_GL_MIN_ALPHA: | |
190 | data[p++]=AGL_ALPHA_SIZE; data[p++]=attribList[arg++]; break; | |
191 | case WX_GL_DEPTH_SIZE: | |
192 | data[p++]=AGL_DEPTH_SIZE; data[p++]=attribList[arg++]; break; | |
193 | case WX_GL_STENCIL_SIZE: | |
194 | data[p++]=AGL_STENCIL_SIZE; data[p++]=attribList[arg++]; break; | |
195 | case WX_GL_MIN_ACCUM_RED: | |
196 | data[p++]=AGL_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break; | |
197 | case WX_GL_MIN_ACCUM_GREEN: | |
198 | data[p++]=AGL_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break; | |
199 | case WX_GL_MIN_ACCUM_BLUE: | |
200 | data[p++]=AGL_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break; | |
201 | case WX_GL_MIN_ACCUM_ALPHA: | |
202 | data[p++]=AGL_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break; | |
203 | default: | |
204 | break; | |
205 | } | |
206 | } | |
207 | data[p] = 0; | |
208 | ||
16506231 | 209 | attribs = data; |
0a67a93b | 210 | } |
16506231 GD |
211 | |
212 | return aglChoosePixelFormat(NULL, 0, attribs); | |
213 | } | |
214 | ||
215 | bool wxGLCanvas::Create(wxWindow *parent, const wxGLContext *shared, wxWindowID id, | |
216 | const wxPoint& pos, const wxSize& size, long style, const wxString& name, | |
217 | int *attribList, const wxPalette& palette) | |
218 | { | |
219 | m_macEraseOnRedraw = false ; | |
4660d7e5 | 220 | wxWindow::Create( parent, id, pos, size, style, name ); |
0a67a93b | 221 | |
16506231 | 222 | AGLPixelFormat fmt = ChoosePixelFormat(attribList); |
0a67a93b SC |
223 | wxCHECK_MSG( fmt, false, wxT("Couldn't create OpenGl pixel format") ); |
224 | ||
225 | m_glContext = new wxGLContext(fmt, this, palette, shared); | |
226 | ||
227 | aglDestroyPixelFormat(fmt); | |
228 | ||
229 | return true; | |
230 | } | |
231 | ||
232 | void wxGLCanvas::SwapBuffers() | |
233 | { | |
234 | if (m_glContext) | |
235 | m_glContext->SwapBuffers(); | |
236 | } | |
237 | ||
238 | void wxGLCanvas::UpdateContext() | |
239 | { | |
240 | if (m_glContext) | |
241 | m_glContext->Update(); | |
242 | } | |
243 | ||
244 | void wxGLCanvas::SetViewport() | |
245 | { | |
246 | // viewport is initially set to entire port | |
247 | // adjust glViewport to just this window | |
248 | int x = 0 ; | |
249 | int y = 0 ; | |
250 | ||
251 | MacClientToRootWindow( &x , &y ) ; | |
252 | int width, height; | |
253 | GetClientSize(& width, & height); | |
254 | Rect bounds ; | |
255 | GetWindowPortBounds( GetMacRootWindow() , &bounds ) ; | |
256 | GLint parms[4] ; | |
257 | parms[0] = x ; | |
258 | parms[1] = bounds.bottom - bounds.top - ( y + height ) ; | |
259 | parms[2] = width ; | |
260 | parms[3] = height ; | |
261 | ||
262 | aglSetInteger( m_glContext->m_glContext , AGL_BUFFER_RECT , parms ) ; | |
263 | } | |
264 | ||
265 | void wxGLCanvas::OnSize(wxSizeEvent& event) | |
266 | { | |
267 | if (m_glContext) | |
268 | { | |
269 | UpdateContext(); | |
270 | m_glContext->SetCurrent(); | |
271 | ||
272 | SetViewport(); | |
273 | glMatrixMode(GL_PROJECTION); | |
274 | glLoadIdentity(); | |
275 | glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 ); | |
276 | glMatrixMode(GL_MODELVIEW); | |
277 | } | |
278 | } | |
279 | ||
280 | void wxGLCanvas::SetCurrent() | |
281 | { | |
282 | if (m_glContext) | |
283 | { | |
284 | m_glContext->SetCurrent(); | |
285 | } | |
286 | } | |
287 | ||
288 | void wxGLCanvas::SetColour(const char *colour) | |
289 | { | |
290 | if (m_glContext) | |
291 | m_glContext->SetColour(colour); | |
292 | } | |
293 | ||
16506231 GD |
294 | |
295 | //--------------------------------------------------------------------------- | |
296 | // wxGLApp | |
297 | //--------------------------------------------------------------------------- | |
298 | ||
299 | IMPLEMENT_CLASS(wxGLApp, wxApp) | |
300 | ||
301 | bool wxGLApp::InitGLVisual(int *attribList) | |
302 | { | |
303 | AGLPixelFormat fmt = ChoosePixelFormat(attribList); | |
bf44306e GD |
304 | if (fmt != NULL) { |
305 | aglDestroyPixelFormat(fmt); | |
306 | return true; | |
307 | } else | |
308 | return false; | |
16506231 GD |
309 | } |
310 | ||
311 | wxGLApp::~wxGLApp(void) | |
312 | { | |
313 | } | |
314 | ||
0a67a93b | 315 | #endif // wxUSE_GLCANVAS |