///////////////////////////////////////////////////////////////////////////// // Name: src/gtk/glcanvas.cpp // Purpose: wxGLCanvas, for using OpenGL/Mesa with wxWidgets and GTK // Author: Robert Roebling // Modified by: // Created: 17/08/98 // RCS-ID: $Id: glcanvas.cpp 60708 2009-05-21 17:58:40Z PC $ // Copyright: (c) Robert Roebling // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #if wxUSE_GLCANVAS #include "wx/glcanvas.h" #ifndef WX_PRECOMP #include "wx/app.h" #include "wx/frame.h" #include "wx/colour.h" #include "wx/module.h" #endif // WX_PRECOMP extern "C" { #include "gtk/gtk.h" #include "gdk/gdk.h" #include "gdk/gdkx.h" } #include "wx/gtk/win_gtk.h" #include "wx/gtk/private.h" // DLL options compatibility check: #include "wx/build.h" WX_CHECK_BUILD_OPTIONS("wxGL") //--------------------------------------------------------------------------- // static variables //--------------------------------------------------------------------------- int wxGLCanvas::m_glxVersion = 0; //--------------------------------------------------------------------------- // global data //--------------------------------------------------------------------------- XVisualInfo *g_vi = (XVisualInfo*) NULL; //--------------------------------------------------------------------------- // wxGLContext //--------------------------------------------------------------------------- IMPLEMENT_CLASS(wxGLContext,wxObject) wxGLContext::wxGLContext(wxWindow* win, const wxGLContext* other) { wxGLCanvas *gc = (wxGLCanvas*) win; if (wxGLCanvas::GetGLXVersion() >= 13) { // GLX >= 1.3 GLXFBConfig *fbc = gc->m_fbc; wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") ); m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, other ? other->m_glContext : None, GL_TRUE ); } else { // GLX <= 1.2 XVisualInfo *vi = (XVisualInfo *) gc->m_vi; wxCHECK_RET( vi, _T("invalid visual for OpenGl") ); m_glContext = glXCreateContext( GDK_DISPLAY(), vi, other ? other->m_glContext : None, GL_TRUE ); } if ( !m_glContext ) { wxFAIL_MSG( _T("Couldn't create OpenGl context") ); } } wxGLContext::~wxGLContext() { if (!m_glContext) return; if (m_glContext == glXGetCurrentContext()) { if (wxGLCanvas::GetGLXVersion() >= 13) // GLX >= 1.3 glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL); else // GLX <= 1.2 glXMakeCurrent( GDK_DISPLAY(), None, NULL); } glXDestroyContext( GDK_DISPLAY(), m_glContext ); } void wxGLContext::SetCurrent(const wxGLCanvas& win) const { if (m_glContext) { GdkWindow *window = GTK_PIZZA(win.m_wxwindow)->bin_window; if (window == NULL) return; if (wxGLCanvas::GetGLXVersion() >= 13) // GLX >= 1.3 glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), GDK_WINDOW_XWINDOW(window), m_glContext ); else // GLX <= 1.2 glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext ); } } //----------------------------------------------------------------------------- // "realize" from m_wxwindow //----------------------------------------------------------------------------- extern "C" { static void gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win ) { if (!win->m_glContext && win->m_createImplicitContext) { wxGLContext *share = win->m_sharedContext; if ( !share && win->m_sharedContextOf ) share = win->m_sharedContextOf->GetContext(); win->m_glContext = new wxGLContext(win, share); } } } //----------------------------------------------------------------------------- // "map" from m_wxwindow //----------------------------------------------------------------------------- extern "C" { static void gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win ) { // CF: Can the "if" line be removed, and the code unconditionally (always) be run? if (win->m_glContext || !win->m_createImplicitContext) { wxPaintEvent event( win->GetId() ); event.SetEventObject( win ); win->GetEventHandler()->ProcessEvent( event ); win->m_exposed = false; win->GetUpdateRegion().Clear(); } } } //----------------------------------------------------------------------------- // "expose_event" of m_wxwindow //----------------------------------------------------------------------------- extern "C" { static gboolean gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win ) { // don't need to install idle handler, its done from "event" signal win->m_exposed = true; win->GetUpdateRegion().Union( gdk_event->area.x, gdk_event->area.y, gdk_event->area.width, gdk_event->area.height ); return false; } } //----------------------------------------------------------------------------- // "size_allocate" of m_wxwindow //----------------------------------------------------------------------------- extern "C" { static void gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win ) { if (g_isIdle) wxapp_install_idle_handler(); if (!win->m_hasVMT) return; wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() ); event.SetEventObject( win ); win->GetEventHandler()->ProcessEvent( event ); } } //----------------------------------------------------------------------------- // emission hook for "parent-set" //----------------------------------------------------------------------------- extern "C" { static gboolean parent_set_hook(GSignalInvocationHint*, guint, const GValue* param_values, void* data) { wxGLCanvas* win = (wxGLCanvas*)data; if (g_value_peek_pointer(¶m_values[0]) == win->m_wxwindow) { const XVisualInfo* xvi = (XVisualInfo*)win->m_vi; GdkVisual* visual = gtk_widget_get_visual(win->m_wxwindow); if (GDK_VISUAL_XVISUAL(visual)->visualid != xvi->visualid) { #if GTK_CHECK_VERSION(2, 2, 0) if (gtk_check_version(2, 2, 0) == NULL) { GdkScreen* screen = gtk_widget_get_screen(win->m_wxwindow); visual = gdk_x11_screen_lookup_visual(screen, xvi->visualid); } else #endif { visual = gdkx_visual_get(xvi->visualid); } GdkColormap* colormap = gdk_colormap_new(visual, false); gtk_widget_set_colormap(win->m_wxwindow, colormap); g_object_unref(colormap); } // remove hook return false; } return true; } } //--------------------------------------------------------------------------- // wxGlCanvas //--------------------------------------------------------------------------- IMPLEMENT_CLASS(wxGLCanvas, wxWindow) BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow) EVT_SIZE(wxGLCanvas::OnSize) END_EVENT_TABLE() wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id, int *attribList, const wxPoint& pos, const wxSize& size, long style, const wxString& name, const wxPalette& palette ) : m_createImplicitContext(false) { Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette ); } wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size, long style, const wxString& name, int *attribList, const wxPalette& palette ) : m_createImplicitContext(true) { Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette ); } wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLContext *shared, wxWindowID id, const wxPoint& pos, const wxSize& size, long style, const wxString& name, int *attribList, const wxPalette& palette ) : m_createImplicitContext(true) { Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette ); } wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID id, const wxPoint& pos, const wxSize& size, long style, const wxString& name, int *attribList, const wxPalette& palette ) : m_createImplicitContext(true) { Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette ); } bool wxGLCanvas::Create( wxWindow *parent, const wxGLContext *shared, const wxGLCanvas *shared_context_of, wxWindowID id, const wxPoint& pos, const wxSize& size, long style, const wxString& name, int *attribList, const wxPalette& palette) { m_sharedContext = (wxGLContext*)shared; // const_cast m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast m_glContext = (wxGLContext*) NULL; m_exposed = false; m_noExpose = true; m_nativeSizeEvent = true; m_fbc = NULL; m_vi = NULL; // to be sure the glx version is known wxGLCanvas::QueryGLXVersion(); if (wxGLCanvas::GetGLXVersion() >= 13) { // GLX >= 1.3 uses a GLXFBConfig GLXFBConfig * fbc = NULL; if (wxTheApp->m_glFBCInfo != NULL) { fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo; m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction } else { fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList); m_canFreeFBC = true; } m_fbc = fbc; // save for later use wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") ); } XVisualInfo *vi = NULL; if (wxTheApp->m_glVisualInfo != NULL) { vi = (XVisualInfo *)wxTheApp->m_glVisualInfo; m_canFreeVi = false; // owned by wxTheApp - don't free upon destruction } else { if (wxGLCanvas::GetGLXVersion() >= 13) // GLX >= 1.3 vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]); else // GLX <= 1.2 vi = (XVisualInfo *) ChooseGLVisual(attribList); m_canFreeVi = true; } m_vi = vi; // save for later use wxCHECK_MSG( m_vi, false, _T("required visual couldn't be found") ); // watch for the "parent-set" signal on m_wxwindow so we can set colormap // before m_wxwindow is realized (which will occur before // wxWindow::Create() returns if parent is already visible) unsigned sig_id = g_signal_lookup("parent-set", GTK_TYPE_WIDGET); g_signal_add_emission_hook(sig_id, 0, parent_set_hook, this, NULL); wxWindow::Create(parent, id, pos, size, style, name); m_glWidget = m_wxwindow; gtk_widget_set_double_buffered( m_glWidget, FALSE ); g_signal_connect(m_wxwindow, "realize", G_CALLBACK(gtk_glwindow_realized_callback), this); g_signal_connect(m_wxwindow, "map", G_CALLBACK(gtk_glwindow_map_callback), this); g_signal_connect(m_wxwindow, "expose_event", G_CALLBACK(gtk_glwindow_expose_callback), this); g_signal_connect(m_widget, "size_allocate", G_CALLBACK(gtk_glcanvas_size_callback), this); // if our parent window is already visible, we had been realized before we // connected to the "realize" signal and hence our m_glContext hasn't been // initialized yet and we have to do it now if (GTK_WIDGET_REALIZED(m_wxwindow)) gtk_glwindow_realized_callback( m_wxwindow, this ); if (GTK_WIDGET_MAPPED(m_wxwindow)) gtk_glwindow_map_callback( m_wxwindow, this ); return true; } wxGLCanvas::~wxGLCanvas() { GLXFBConfig * fbc = (GLXFBConfig *) m_fbc; if (fbc && m_canFreeFBC) XFree( fbc ); XVisualInfo *vi = (XVisualInfo *) m_vi; if (vi && m_canFreeVi) XFree( vi ); delete m_glContext; } void* wxGLCanvas::ChooseGLVisual(int *attribList) { int data[512]; GetGLAttribListFromWX( attribList, data ); attribList = (int*) data; Display *dpy = GDK_DISPLAY(); return glXChooseVisual( dpy, DefaultScreen(dpy), attribList ); } void* wxGLCanvas::ChooseGLFBC(int *attribList) { int data[512]; GetGLAttribListFromWX( attribList, data ); attribList = (int*) data; int returned; return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()), attribList, &returned ); } void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList ) { if (!wx_attribList) { if (wxGLCanvas::GetGLXVersion() >= 13) // leave GLX >= 1.3 choose the default attributes gl_attribList[0] = 0; else { int i = 0; // default settings if attriblist = 0 gl_attribList[i++] = GLX_RGBA; gl_attribList[i++] = GLX_DOUBLEBUFFER; gl_attribList[i++] = GLX_DEPTH_SIZE; gl_attribList[i++] = 1; gl_attribList[i++] = GLX_RED_SIZE; gl_attribList[i++] = 1; gl_attribList[i++] = GLX_GREEN_SIZE; gl_attribList[i++] = 1; gl_attribList[i++] = GLX_BLUE_SIZE; gl_attribList[i++] = 1; gl_attribList[i++] = GLX_ALPHA_SIZE; gl_attribList[i++] = 0; gl_attribList[i++] = None; } } else { int arg=0, p=0; while( (wx_attribList[arg]!=0) && (p<510) ) { switch( wx_attribList[arg++] ) { case WX_GL_RGBA: if (wxGLCanvas::GetGLXVersion() <= 12) // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm) gl_attribList[p++] = GLX_RGBA; break; case WX_GL_BUFFER_SIZE: gl_attribList[p++] = GLX_BUFFER_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_LEVEL: gl_attribList[p++] = GLX_LEVEL; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_DOUBLEBUFFER: if (wxGLCanvas::GetGLXVersion() <= 12) gl_attribList[p++] = GLX_DOUBLEBUFFER; else // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True) // it seems this flag is useless for some hardware opengl implementation. // but for Mesa 6.2.1, this flag is used so don't ignore it. gl_attribList[p++] = GLX_DOUBLEBUFFER; gl_attribList[p++] = 1; break; case WX_GL_STEREO: gl_attribList[p++] = GLX_STEREO; gl_attribList[p++] = 1; break; case WX_GL_AUX_BUFFERS: gl_attribList[p++] = GLX_AUX_BUFFERS; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_RED: gl_attribList[p++] = GLX_RED_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_GREEN: gl_attribList[p++] = GLX_GREEN_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_BLUE: gl_attribList[p++] = GLX_BLUE_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_ALPHA: gl_attribList[p++] = GLX_ALPHA_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_DEPTH_SIZE: gl_attribList[p++] = GLX_DEPTH_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_STENCIL_SIZE: gl_attribList[p++] = GLX_STENCIL_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_ACCUM_RED: gl_attribList[p++] = GLX_ACCUM_RED_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_ACCUM_GREEN: gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_ACCUM_BLUE: gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; case WX_GL_MIN_ACCUM_ALPHA: gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE; gl_attribList[p++] = wx_attribList[arg++]; break; default: break; } } gl_attribList[p] = 0; } } void wxGLCanvas::QueryGLXVersion() { if (m_glxVersion == 0) { // check the GLX version int glxMajorVer, glxMinorVer; bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer); wxASSERT_MSG( ok, _T("GLX version not found") ); if (!ok) m_glxVersion = 10; // 1.0 by default else m_glxVersion = glxMajorVer*10 + glxMinorVer; } } int wxGLCanvas::GetGLXVersion() { wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") ); return m_glxVersion; } void wxGLCanvas::SwapBuffers() { GdkWindow *window = GTK_PIZZA(m_wxwindow)->bin_window; glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) ); } void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event)) { } void wxGLCanvas::SetCurrent(const wxGLContext& RC) const { RC.SetCurrent(*this); } void wxGLCanvas::SetCurrent() { if (m_glContext) m_glContext->SetCurrent(*this); } void wxGLCanvas::SetColour( const wxChar *colour ) { wxColour col = wxTheColourDatabase->Find(colour); if (col.Ok()) { float r = (float)(col.Red()/256.0); float g = (float)(col.Green()/256.0); float b = (float)(col.Blue()/256.0); glColor3f( r, g, b); } } void wxGLCanvas::OnInternalIdle() { if (/*m_glContext &&*/ m_exposed) { wxPaintEvent event( GetId() ); event.SetEventObject( this ); GetEventHandler()->ProcessEvent( event ); m_exposed = false; GetUpdateRegion().Clear(); } wxWindow::OnInternalIdle(); } //--------------------------------------------------------------------------- // wxGLApp //--------------------------------------------------------------------------- IMPLEMENT_CLASS(wxGLApp, wxApp) wxGLApp::~wxGLApp() { if (m_glFBCInfo) XFree(m_glFBCInfo); if (m_glVisualInfo) XFree(m_glVisualInfo); } bool wxGLApp::InitGLVisual(int *attribList) { wxGLCanvas::QueryGLXVersion(); if (wxGLCanvas::GetGLXVersion() >= 13) { // GLX >= 1.3 if (m_glFBCInfo) XFree(m_glFBCInfo); m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList); if (m_glFBCInfo) { if (m_glVisualInfo) XFree(m_glVisualInfo); m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]); } return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL); } else { // GLX <= 1.2 if (m_glVisualInfo) XFree(m_glVisualInfo); m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList); return m_glVisualInfo != NULL; } } #endif // wxUSE_GLCANVAS