fixed crash in OnSize() handler

[wxWidgets.git] / src / gtk1 / glcanvas.cpp

diff --git a/src/gtk1/glcanvas.cpp b/src/gtk1/glcanvas.cpp
index 16c1cabe06c15352839e5a103511a2bc114e593a..c15057112d81dd4a991232f6566f641f88029ba5 100644 (file)
--- a/src/gtk1/glcanvas.cpp
+++ b/src/gtk1/glcanvas.cpp
@@ -291,51 +291,15 @@ bool wxGLCanvas::Create( wxWindow *parent,
     m_noExpose = TRUE;
     m_nativeSizeEvent = TRUE;
     
-    if (!attribList)
-    {
-        int data[] = { GLX_RGBA, 
-                      GLX_DOUBLEBUFFER, 
-                      GLX_DEPTH_SIZE, 1,  // use largest available depth buffer
-                      GLX_RED_SIZE, 1, 
-                      GLX_GREEN_SIZE, 1, 
-                      GLX_BLUE_SIZE, 1, 
-                      GLX_ALPHA_SIZE, 0, 
-                      None };
-       attribList = (int*) data;
+    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 {
+        vi = (XVisualInfo *) ChooseGLVisual(attribList);
+        m_canFreeVi = TRUE;
     }
-    else
-    {
-      int data[512], arg=0, p=0;
-       
-      while( (attribList[arg]!=0) && (p<512) )
-      {
-        switch( attribList[arg++] )
-        {
-          case WX_GL_RGBA: data[p++] = GLX_RGBA; break;
-          case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break;
-          case WX_GL_DEPTH_SIZE: 
-            data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_RED:
-            data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_GREEN:
-            data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_BLUE:
-            data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break;
-          default:
-            break;
-        }
-      }       
-      data[p] = 0; 
-
-      attribList = (int*) data;
-    }
-    
-    
-    Display *dpy = GDK_DISPLAY();
-    
-    XVisualInfo *vi = glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
-    
-    m_vi = vi;  // safe for later use
+    m_vi = vi;  // save for later use
     
     wxCHECK_MSG( m_vi, FALSE, "required visual couldn't be found" );
 
@@ -369,6 +333,12 @@ bool wxGLCanvas::Create( wxWindow *parent,
     gtk_widget_pop_visual();
     gtk_widget_pop_colormap();
     
+    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;
 }
 
@@ -376,10 +346,79 @@ wxGLCanvas::~wxGLCanvas()
 {
     XVisualInfo *vi = (XVisualInfo *) m_vi;
     
-    if (vi) XFree( vi );
+    if (vi && m_canFreeVi) XFree( vi );
     if (m_glContext) delete m_glContext;
 }
 
+void* wxGLCanvas::ChooseGLVisual(int *attribList)
+{
+    int data[512];
+    if (!attribList)
+    {
+        // default settings if attriblist = 0
+        data[0] = GLX_RGBA;
+        data[1] = GLX_DOUBLEBUFFER;
+        data[2] = GLX_DEPTH_SIZE;   data[3] = 1;
+        data[4] = GLX_RED_SIZE;     data[5] = 1;
+        data[6] = GLX_GREEN_SIZE;   data[7] = 1;
+        data[8] = GLX_BLUE_SIZE;    data[9] = 1;
+        data[10] = GLX_ALPHA_SIZE;  data[11] = 0;
+        data[12] = None;
+
+       attribList = (int*) data;
+    }
+    else
+    {
+      int arg=0, p=0;
+       
+      while( (attribList[arg]!=0) && (p<510) )
+      {
+        switch( attribList[arg++] )
+        {
+          case WX_GL_RGBA: data[p++] = GLX_RGBA; break;
+          case WX_GL_BUFFER_SIZE:
+            data[p++]=GLX_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_LEVEL:
+            data[p++]=GLX_LEVEL; data[p++]=attribList[arg++]; break;
+          case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break;
+          case WX_GL_STEREO: data[p++] = GLX_STEREO; break;
+          case WX_GL_AUX_BUFFERS:
+            data[p++]=GLX_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_RED:
+            data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_GREEN:
+            data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_BLUE:
+            data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_ALPHA:
+            data[p++]=GLX_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_DEPTH_SIZE: 
+            data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_STENCIL_SIZE: 
+            data[p++]=GLX_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_ACCUM_RED:
+            data[p++]=GLX_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_ACCUM_GREEN:
+            data[p++]=GLX_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_ACCUM_BLUE:
+            data[p++]=GLX_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
+          case WX_GL_MIN_ACCUM_ALPHA:
+            data[p++]=GLX_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
+          default:
+            break;
+        }
+      }       
+      data[p] = 0; 
+
+      attribList = (int*) data;
+    }
+    
+    
+    Display *dpy = GDK_DISPLAY();
+    
+    return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
+}
+
 void wxGLCanvas::SwapBuffers()
 {
     if (m_glContext) m_glContext->SwapBuffers();
@@ -427,6 +466,26 @@ void wxGLCanvas::OnInternalIdle()
     wxWindow::OnInternalIdle();
 }
 
+
+
+//---------------------------------------------------------------------------
+// wxGLApp
+//---------------------------------------------------------------------------
+
+IMPLEMENT_CLASS(wxGLApp, wxApp)
+        
+wxGLApp::~wxGLApp()
+{
+    if (m_glVisualInfo) XFree(m_glVisualInfo);
+}
+
+bool wxGLApp::InitGLVisual(int *attribList)
+{
+    if (m_glVisualInfo) XFree(m_glVisualInfo);
+    m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
+    return (m_glVisualInfo != NULL);
+}
+
 #endif
     // wxUSE_GLCANVAS