| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/univ/glx11.cpp |
| 3 | // Purpose: code common to all X11-based wxGLCanvas implementations |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Created: 2007-04-15 |
| 6 | // RCS-ID: $Id$ |
| 7 | // Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org> |
| 8 | // Licence: wxWindows licence |
| 9 | /////////////////////////////////////////////////////////////////////////////// |
| 10 | |
| 11 | // ============================================================================ |
| 12 | // declarations |
| 13 | // ============================================================================ |
| 14 | |
| 15 | // ---------------------------------------------------------------------------- |
| 16 | // headers |
| 17 | // ---------------------------------------------------------------------------- |
| 18 | |
| 19 | // for compilers that support precompilation, includes "wx.h". |
| 20 | #include "wx/wxprec.h" |
| 21 | |
| 22 | #if wxUSE_GLCANVAS |
| 23 | |
| 24 | #ifndef WX_PRECOMP |
| 25 | #include "wx/log.h" |
| 26 | #endif //WX_PRECOMP |
| 27 | |
| 28 | #include "wx/glcanvas.h" |
| 29 | |
| 30 | // IRIX headers call this differently |
| 31 | #ifdef __SGI__ |
| 32 | #ifndef GLX_SAMPLE_BUFFERS_ARB |
| 33 | #define GLX_SAMPLE_BUFFERS_ARB GLX_SAMPLE_BUFFERS_SGIS |
| 34 | #endif |
| 35 | #ifndef GLX_SAMPLES_ARB |
| 36 | #define GLX_SAMPLES_ARB GLX_SAMPLES_SGIS |
| 37 | #endif |
| 38 | #endif // __SGI__ |
| 39 | |
| 40 | // ============================================================================ |
| 41 | // wxGLContext implementation |
| 42 | // ============================================================================ |
| 43 | |
| 44 | IMPLEMENT_CLASS(wxGLContext, wxObject) |
| 45 | |
| 46 | wxGLContext::wxGLContext(wxGLCanvas *gc, const wxGLContext *other) |
| 47 | { |
| 48 | if ( wxGLCanvas::GetGLXVersion() >= 13 ) |
| 49 | { |
| 50 | GLXFBConfig *fbc = gc->GetGLXFBConfig(); |
| 51 | wxCHECK_RET( fbc, wxT("invalid GLXFBConfig for OpenGL") ); |
| 52 | |
| 53 | m_glContext = glXCreateNewContext( wxGetX11Display(), fbc[0], GLX_RGBA_TYPE, |
| 54 | other ? other->m_glContext : None, |
| 55 | GL_TRUE ); |
| 56 | } |
| 57 | else // GLX <= 1.2 |
| 58 | { |
| 59 | XVisualInfo *vi = gc->GetXVisualInfo(); |
| 60 | wxCHECK_RET( vi, wxT("invalid visual for OpenGL") ); |
| 61 | |
| 62 | m_glContext = glXCreateContext( wxGetX11Display(), vi, |
| 63 | other ? other->m_glContext : None, |
| 64 | GL_TRUE ); |
| 65 | } |
| 66 | |
| 67 | wxASSERT_MSG( m_glContext, wxT("Couldn't create OpenGL context") ); |
| 68 | } |
| 69 | |
| 70 | wxGLContext::~wxGLContext() |
| 71 | { |
| 72 | if ( !m_glContext ) |
| 73 | return; |
| 74 | |
| 75 | if ( m_glContext == glXGetCurrentContext() ) |
| 76 | MakeCurrent(None, NULL); |
| 77 | |
| 78 | glXDestroyContext( wxGetX11Display(), m_glContext ); |
| 79 | } |
| 80 | |
| 81 | bool wxGLContext::SetCurrent(const wxGLCanvas& win) const |
| 82 | { |
| 83 | if ( !m_glContext ) |
| 84 | return false; |
| 85 | |
| 86 | const Window xid = win.GetXWindow(); |
| 87 | wxCHECK2_MSG( xid, return false, wxT("window must be shown") ); |
| 88 | |
| 89 | return MakeCurrent(xid, m_glContext); |
| 90 | } |
| 91 | |
| 92 | // wrapper around glXMakeContextCurrent/glXMakeCurrent depending on GLX |
| 93 | // version |
| 94 | /* static */ |
| 95 | bool wxGLContext::MakeCurrent(GLXDrawable drawable, GLXContext context) |
| 96 | { |
| 97 | if (wxGLCanvas::GetGLXVersion() >= 13) |
| 98 | return glXMakeContextCurrent( wxGetX11Display(), drawable, drawable, context); |
| 99 | else // GLX <= 1.2 doesn't have glXMakeContextCurrent() |
| 100 | return glXMakeCurrent( wxGetX11Display(), drawable, context); |
| 101 | } |
| 102 | |
| 103 | // ============================================================================ |
| 104 | // wxGLCanvasX11 implementation |
| 105 | // ============================================================================ |
| 106 | |
| 107 | // ---------------------------------------------------------------------------- |
| 108 | // initialization methods and dtor |
| 109 | // ---------------------------------------------------------------------------- |
| 110 | |
| 111 | wxGLCanvasX11::wxGLCanvasX11() |
| 112 | { |
| 113 | m_fbc = NULL; |
| 114 | m_vi = NULL; |
| 115 | } |
| 116 | |
| 117 | bool wxGLCanvasX11::InitVisual(const int *attribList) |
| 118 | { |
| 119 | return InitXVisualInfo(attribList, &m_fbc, &m_vi); |
| 120 | } |
| 121 | |
| 122 | wxGLCanvasX11::~wxGLCanvasX11() |
| 123 | { |
| 124 | if ( m_fbc && m_fbc != ms_glFBCInfo ) |
| 125 | XFree(m_fbc); |
| 126 | |
| 127 | if ( m_vi && m_vi != ms_glVisualInfo ) |
| 128 | XFree(m_vi); |
| 129 | } |
| 130 | |
| 131 | // ---------------------------------------------------------------------------- |
| 132 | // working with GL attributes |
| 133 | // ---------------------------------------------------------------------------- |
| 134 | |
| 135 | /* static */ |
| 136 | bool wxGLCanvasBase::IsExtensionSupported(const char *extension) |
| 137 | { |
| 138 | Display * const dpy = wxGetX11Display(); |
| 139 | |
| 140 | return IsExtensionInList(glXQueryExtensionsString(dpy, DefaultScreen(dpy)), |
| 141 | extension); |
| 142 | } |
| 143 | |
| 144 | |
| 145 | /* static */ |
| 146 | bool wxGLCanvasX11::IsGLXMultiSampleAvailable() |
| 147 | { |
| 148 | static int s_isMultiSampleAvailable = -1; |
| 149 | if ( s_isMultiSampleAvailable == -1 ) |
| 150 | s_isMultiSampleAvailable = IsExtensionSupported("GLX_ARB_multisample"); |
| 151 | |
| 152 | return s_isMultiSampleAvailable != 0; |
| 153 | } |
| 154 | |
| 155 | bool |
| 156 | wxGLCanvasX11::ConvertWXAttrsToGL(const int *wxattrs, int *glattrs, size_t n) |
| 157 | { |
| 158 | wxCHECK_MSG( n >= 16, false, wxT("GL attributes buffer too small") ); |
| 159 | |
| 160 | /* |
| 161 | Different versions of GLX API use rather different attributes lists, see |
| 162 | the following URLs: |
| 163 | |
| 164 | - <= 1.2: http://www.opengl.org/sdk/docs/man/xhtml/glXChooseVisual.xml |
| 165 | - >= 1.3: http://www.opengl.org/sdk/docs/man/xhtml/glXChooseFBConfig.xml |
| 166 | |
| 167 | Notice in particular that |
| 168 | - GLX_RGBA is boolean attribute in the old version of the API but a |
| 169 | value of GLX_RENDER_TYPE in the new one |
| 170 | - Boolean attributes such as GLX_DOUBLEBUFFER don't take values in the |
| 171 | old version but must be followed by True or False in the new one. |
| 172 | */ |
| 173 | |
| 174 | if ( !wxattrs ) |
| 175 | { |
| 176 | size_t i = 0; |
| 177 | |
| 178 | // use double-buffered true colour by default |
| 179 | glattrs[i++] = GLX_DOUBLEBUFFER; |
| 180 | |
| 181 | if ( GetGLXVersion() < 13 ) |
| 182 | { |
| 183 | // default settings if attriblist = 0 |
| 184 | glattrs[i++] = GLX_RGBA; |
| 185 | glattrs[i++] = GLX_DEPTH_SIZE; glattrs[i++] = 1; |
| 186 | glattrs[i++] = GLX_RED_SIZE; glattrs[i++] = 1; |
| 187 | glattrs[i++] = GLX_GREEN_SIZE; glattrs[i++] = 1; |
| 188 | glattrs[i++] = GLX_BLUE_SIZE; glattrs[i++] = 1; |
| 189 | glattrs[i++] = GLX_ALPHA_SIZE; glattrs[i++] = 0; |
| 190 | } |
| 191 | else // recent GLX can choose the defaults on its own just fine |
| 192 | { |
| 193 | // we just need to have a value after GLX_DOUBLEBUFFER |
| 194 | glattrs[i++] = True; |
| 195 | } |
| 196 | |
| 197 | glattrs[i] = None; |
| 198 | |
| 199 | wxASSERT_MSG( i < n, wxT("GL attributes buffer too small") ); |
| 200 | } |
| 201 | else // have non-default attributes |
| 202 | { |
| 203 | size_t p = 0; |
| 204 | for ( int arg = 0; wxattrs[arg] != 0; ) |
| 205 | { |
| 206 | // check if we have any space left, knowing that we may insert 2 |
| 207 | // more elements during this loop iteration and we always need to |
| 208 | // terminate the list with None (hence -3) |
| 209 | if ( p > n - 3 ) |
| 210 | return false; |
| 211 | |
| 212 | // indicates whether we have a boolean attribute |
| 213 | bool isBoolAttr = false; |
| 214 | |
| 215 | switch ( wxattrs[arg++] ) |
| 216 | { |
| 217 | case WX_GL_BUFFER_SIZE: |
| 218 | glattrs[p++] = GLX_BUFFER_SIZE; |
| 219 | break; |
| 220 | |
| 221 | case WX_GL_LEVEL: |
| 222 | glattrs[p++] = GLX_LEVEL; |
| 223 | break; |
| 224 | |
| 225 | case WX_GL_RGBA: |
| 226 | if ( GetGLXVersion() >= 13 ) |
| 227 | { |
| 228 | // this is the default GLX_RENDER_TYPE anyhow |
| 229 | continue; |
| 230 | } |
| 231 | |
| 232 | glattrs[p++] = GLX_RGBA; |
| 233 | isBoolAttr = true; |
| 234 | break; |
| 235 | |
| 236 | case WX_GL_DOUBLEBUFFER: |
| 237 | glattrs[p++] = GLX_DOUBLEBUFFER; |
| 238 | isBoolAttr = true; |
| 239 | break; |
| 240 | |
| 241 | case WX_GL_STEREO: |
| 242 | glattrs[p++] = GLX_STEREO; |
| 243 | isBoolAttr = true; |
| 244 | break; |
| 245 | |
| 246 | case WX_GL_AUX_BUFFERS: |
| 247 | glattrs[p++] = GLX_AUX_BUFFERS; |
| 248 | break; |
| 249 | |
| 250 | case WX_GL_MIN_RED: |
| 251 | glattrs[p++] = GLX_RED_SIZE; |
| 252 | break; |
| 253 | |
| 254 | case WX_GL_MIN_GREEN: |
| 255 | glattrs[p++] = GLX_GREEN_SIZE; |
| 256 | break; |
| 257 | |
| 258 | case WX_GL_MIN_BLUE: |
| 259 | glattrs[p++] = GLX_BLUE_SIZE; |
| 260 | break; |
| 261 | |
| 262 | case WX_GL_MIN_ALPHA: |
| 263 | glattrs[p++] = GLX_ALPHA_SIZE; |
| 264 | break; |
| 265 | |
| 266 | case WX_GL_DEPTH_SIZE: |
| 267 | glattrs[p++] = GLX_DEPTH_SIZE; |
| 268 | break; |
| 269 | |
| 270 | case WX_GL_STENCIL_SIZE: |
| 271 | glattrs[p++] = GLX_STENCIL_SIZE; |
| 272 | break; |
| 273 | |
| 274 | case WX_GL_MIN_ACCUM_RED: |
| 275 | glattrs[p++] = GLX_ACCUM_RED_SIZE; |
| 276 | break; |
| 277 | |
| 278 | case WX_GL_MIN_ACCUM_GREEN: |
| 279 | glattrs[p++] = GLX_ACCUM_GREEN_SIZE; |
| 280 | break; |
| 281 | |
| 282 | case WX_GL_MIN_ACCUM_BLUE: |
| 283 | glattrs[p++] = GLX_ACCUM_BLUE_SIZE; |
| 284 | break; |
| 285 | |
| 286 | case WX_GL_MIN_ACCUM_ALPHA: |
| 287 | glattrs[p++] = GLX_ACCUM_ALPHA_SIZE; |
| 288 | break; |
| 289 | |
| 290 | case WX_GL_SAMPLE_BUFFERS: |
| 291 | #ifdef GLX_SAMPLE_BUFFERS_ARB |
| 292 | if ( IsGLXMultiSampleAvailable() ) |
| 293 | { |
| 294 | glattrs[p++] = GLX_SAMPLE_BUFFERS_ARB; |
| 295 | break; |
| 296 | } |
| 297 | #endif // GLX_SAMPLE_BUFFERS_ARB |
| 298 | // if it was specified just to disable it, no problem |
| 299 | if ( !wxattrs[arg++] ) |
| 300 | continue; |
| 301 | |
| 302 | // otherwise indicate that it's not supported |
| 303 | return false; |
| 304 | |
| 305 | case WX_GL_SAMPLES: |
| 306 | #ifdef GLX_SAMPLES_ARB |
| 307 | if ( IsGLXMultiSampleAvailable() ) |
| 308 | { |
| 309 | glattrs[p++] = GLX_SAMPLES_ARB; |
| 310 | break; |
| 311 | } |
| 312 | #endif // GLX_SAMPLES_ARB |
| 313 | |
| 314 | if ( !wxattrs[arg++] ) |
| 315 | continue; |
| 316 | |
| 317 | return false; |
| 318 | |
| 319 | default: |
| 320 | wxLogDebug(wxT("Unsupported OpenGL attribute %d"), |
| 321 | wxattrs[arg - 1]); |
| 322 | continue; |
| 323 | } |
| 324 | |
| 325 | if ( isBoolAttr ) |
| 326 | { |
| 327 | // as explained above, for pre 1.3 API the attribute just needs |
| 328 | // to be present so we only add its value when using the new API |
| 329 | if ( GetGLXVersion() >= 13 ) |
| 330 | glattrs[p++] = True; |
| 331 | } |
| 332 | else // attribute with real (non-boolean) value |
| 333 | { |
| 334 | // copy attribute value as is |
| 335 | glattrs[p++] = wxattrs[arg++]; |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | glattrs[p] = None; |
| 340 | } |
| 341 | |
| 342 | return true; |
| 343 | } |
| 344 | |
| 345 | /* static */ |
| 346 | bool |
| 347 | wxGLCanvasX11::InitXVisualInfo(const int *attribList, |
| 348 | GLXFBConfig **pFBC, |
| 349 | XVisualInfo **pXVisual) |
| 350 | { |
| 351 | int data[512]; |
| 352 | if ( !ConvertWXAttrsToGL(attribList, data, WXSIZEOF(data)) ) |
| 353 | return false; |
| 354 | |
| 355 | Display * const dpy = wxGetX11Display(); |
| 356 | |
| 357 | if ( GetGLXVersion() >= 13 ) |
| 358 | { |
| 359 | int returned; |
| 360 | *pFBC = glXChooseFBConfig(dpy, DefaultScreen(dpy), data, &returned); |
| 361 | |
| 362 | if ( *pFBC ) |
| 363 | { |
| 364 | *pXVisual = glXGetVisualFromFBConfig(wxGetX11Display(), **pFBC); |
| 365 | if ( !*pXVisual ) |
| 366 | { |
| 367 | XFree(*pFBC); |
| 368 | *pFBC = NULL; |
| 369 | } |
| 370 | } |
| 371 | } |
| 372 | else // GLX <= 1.2 |
| 373 | { |
| 374 | *pFBC = NULL; |
| 375 | *pXVisual = glXChooseVisual(dpy, DefaultScreen(dpy), data); |
| 376 | } |
| 377 | |
| 378 | return *pXVisual != NULL; |
| 379 | } |
| 380 | |
| 381 | /* static */ |
| 382 | bool |
| 383 | wxGLCanvasBase::IsDisplaySupported(const int *attribList) |
| 384 | { |
| 385 | GLXFBConfig *fbc = NULL; |
| 386 | XVisualInfo *vi = NULL; |
| 387 | |
| 388 | const bool |
| 389 | isSupported = wxGLCanvasX11::InitXVisualInfo(attribList, &fbc, &vi); |
| 390 | |
| 391 | if ( fbc ) |
| 392 | XFree(fbc); |
| 393 | if ( vi ) |
| 394 | XFree(vi); |
| 395 | |
| 396 | return isSupported; |
| 397 | } |
| 398 | |
| 399 | // ---------------------------------------------------------------------------- |
| 400 | // default visual management |
| 401 | // ---------------------------------------------------------------------------- |
| 402 | |
| 403 | XVisualInfo *wxGLCanvasX11::ms_glVisualInfo = NULL; |
| 404 | GLXFBConfig *wxGLCanvasX11::ms_glFBCInfo = NULL; |
| 405 | |
| 406 | /* static */ |
| 407 | bool wxGLCanvasX11::InitDefaultVisualInfo(const int *attribList) |
| 408 | { |
| 409 | FreeDefaultVisualInfo(); |
| 410 | |
| 411 | return InitXVisualInfo(attribList, &ms_glFBCInfo, &ms_glVisualInfo); |
| 412 | } |
| 413 | |
| 414 | /* static */ |
| 415 | void wxGLCanvasX11::FreeDefaultVisualInfo() |
| 416 | { |
| 417 | if ( ms_glFBCInfo ) |
| 418 | { |
| 419 | XFree(ms_glFBCInfo); |
| 420 | ms_glFBCInfo = NULL; |
| 421 | } |
| 422 | |
| 423 | if ( ms_glVisualInfo ) |
| 424 | { |
| 425 | XFree(ms_glVisualInfo); |
| 426 | ms_glVisualInfo = NULL; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | // ---------------------------------------------------------------------------- |
| 431 | // other GL methods |
| 432 | // ---------------------------------------------------------------------------- |
| 433 | |
| 434 | /* static */ |
| 435 | int wxGLCanvasX11::GetGLXVersion() |
| 436 | { |
| 437 | static int s_glxVersion = 0; |
| 438 | if ( s_glxVersion == 0 ) |
| 439 | { |
| 440 | // check the GLX version |
| 441 | int glxMajorVer, glxMinorVer; |
| 442 | bool ok = glXQueryVersion(wxGetX11Display(), &glxMajorVer, &glxMinorVer); |
| 443 | wxASSERT_MSG( ok, wxT("GLX version not found") ); |
| 444 | if (!ok) |
| 445 | s_glxVersion = 10; // 1.0 by default |
| 446 | else |
| 447 | s_glxVersion = glxMajorVer*10 + glxMinorVer; |
| 448 | } |
| 449 | |
| 450 | return s_glxVersion; |
| 451 | } |
| 452 | |
| 453 | bool wxGLCanvasX11::SwapBuffers() |
| 454 | { |
| 455 | const Window xid = GetXWindow(); |
| 456 | wxCHECK2_MSG( xid, return false, wxT("window must be shown") ); |
| 457 | |
| 458 | glXSwapBuffers(wxGetX11Display(), xid); |
| 459 | return true; |
| 460 | } |
| 461 | |
| 462 | bool wxGLCanvasX11::IsShownOnScreen() const |
| 463 | { |
| 464 | return GetXWindow() && wxGLCanvasBase::IsShownOnScreen(); |
| 465 | } |
| 466 | |
| 467 | #endif // wxUSE_GLCANVAS |
| 468 | |