X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a15107c002d8dee9e64692ecb307e41c5f90d70d..952f8d3c7a729127bf73ba4f819cbadc51753e79:/src/unix/glx11.cpp

diff --git a/src/unix/glx11.cpp b/src/unix/glx11.cpp
index ffa31f4eb4..84fd0d441e 100644
--- a/src/unix/glx11.cpp
+++ b/src/unix/glx11.cpp
@@ -68,26 +68,26 @@ wxGLContext::~wxGLContext()
     glXDestroyContext( wxGetX11Display(), m_glContext );
 }
 
-void wxGLContext::SetCurrent(const wxGLCanvas& win) const
+bool wxGLContext::SetCurrent(const wxGLCanvas& win) const
 {
     if ( !m_glContext )
-        return;
+        return false;
 
     const Window xid = win.GetXWindow();
-    wxCHECK_RET( xid, _T("window must be shown") );
+    wxCHECK2_MSG( xid, return false, _T("window must be shown") );
 
-    MakeCurrent(xid, m_glContext);
+    return MakeCurrent(xid, m_glContext);
 }
 
 // wrapper around glXMakeContextCurrent/glXMakeCurrent depending on GLX
 // version
 /* static */
-void wxGLContext::MakeCurrent(GLXDrawable drawable, GLXContext context)
+bool wxGLContext::MakeCurrent(GLXDrawable drawable, GLXContext context)
 {
     if (wxGLCanvas::GetGLXVersion() >= 13)
-        glXMakeContextCurrent( wxGetX11Display(), drawable, drawable, context);
+        return glXMakeContextCurrent( wxGetX11Display(), drawable, drawable, context);
     else // GLX <= 1.2 doesn't have glXMakeContextCurrent()
-        glXMakeCurrent( wxGetX11Display(), drawable, context);
+        return glXMakeCurrent( wxGetX11Display(), drawable, context);
 }
 
 // ============================================================================
@@ -129,26 +129,26 @@ wxGLCanvasX11::ConvertWXAttrsToGL(const int *wxattrs, int *glattrs, size_t n)
 
     if ( !wxattrs )
     {
-        if ( GetGLXVersion() >= 13 )
-        {
-            // leave GLX >= 1.3 choose the default attributes
-            glattrs[0] = None;
-        }
-        else // GLX < 1.3
+        size_t i = 0;
+
+        // use double-buffered true colour by default
+        glattrs[i++] = GLX_RGBA;            glattrs[i++] = True;
+        glattrs[i++] = GLX_DOUBLEBUFFER;    glattrs[i++] = True;
+
+        if ( GetGLXVersion() < 13 )
         {
             // default settings if attriblist = 0
-            size_t i = 0;
-            glattrs[i++] = GLX_RGBA;
-            glattrs[i++] = GLX_DOUBLEBUFFER;
             glattrs[i++] = GLX_DEPTH_SIZE;   glattrs[i++] = 1;
             glattrs[i++] = GLX_RED_SIZE;     glattrs[i++] = 1;
             glattrs[i++] = GLX_GREEN_SIZE;   glattrs[i++] = 1;
             glattrs[i++] = GLX_BLUE_SIZE;    glattrs[i++] = 1;
             glattrs[i++] = GLX_ALPHA_SIZE;   glattrs[i++] = 0;
-            glattrs[i++] = None;
-
-            wxASSERT_MSG( i < n, _T("GL attributes buffer too small") );
         }
+        //else: recent GLX can choose the defaults on its own just fine
+
+        glattrs[i] = None;
+
+        wxASSERT_MSG( i < n, _T("GL attributes buffer too small") );
     }
     else // have non-default attributes
     {
@@ -158,25 +158,11 @@ wxGLCanvasX11::ConvertWXAttrsToGL(const int *wxattrs, int *glattrs, size_t n)
             // check if we have any space left, knowing that we may insert 2
             // more elements during this loop iteration and we always need to
             // terminate the list with None (hence -3)
-            if ( p >= n - 2 )
+            if ( p > n - 3 )
                 return false;
 
             switch ( wxattrs[arg++] )
             {
-                case WX_GL_RGBA:
-                    // for GLX >= 1.3, GLX_RGBA is useless and apparently
-                    // harmful for some implementations
-                    //
-                    // FIXME: is this true?
-                    if ( GetGLXVersion() <= 12 )
-                    {
-                        glattrs[p++] = GLX_RGBA;
-                    }
-
-                    // use "continue" to skip the assignment of the attribute
-                    // value at the end of the loop
-                    continue;
-
                 case WX_GL_BUFFER_SIZE:
                     glattrs[p++] = GLX_BUFFER_SIZE;
                     break;
@@ -185,17 +171,26 @@ wxGLCanvasX11::ConvertWXAttrsToGL(const int *wxattrs, int *glattrs, size_t n)
                     glattrs[p++] = GLX_LEVEL;
                     break;
 
+                    // the following boolean attributes don't have values in wx
+                    // API (they're turned on if specified) but do have them in
+                    // OpenGL, so do put them into glattrs and also skip the
+                    // copy of wx value after switch by using "continue"
+                    // instead of "break"
+                case WX_GL_RGBA:
+                    glattrs[p++] = GLX_RGBA;
+                    glattrs[p++] = True;
+                    continue;
+
                 case WX_GL_DOUBLEBUFFER:
                     glattrs[p++] = GLX_DOUBLEBUFFER;
                     glattrs[p++] = True;
-
-                    // again, we don't have value for this one in wx list (even
-                    // though OpenGL does use it)
                     continue;
 
                 case WX_GL_STEREO:
                     glattrs[p++] = GLX_STEREO;
-                    break;
+                    glattrs[p++] = True;
+                    continue;
+
 
                 case WX_GL_AUX_BUFFERS:
                     glattrs[p++] = GLX_AUX_BUFFERS;
@@ -293,6 +288,24 @@ wxGLCanvasX11::InitXVisualInfo(const int *attribList,
     return *pXVisual != NULL;
 }
 
+/* static */
+bool
+wxGLCanvasBase::IsDisplaySupported(const int *attribList)
+{
+    GLXFBConfig *fbc = NULL;
+    XVisualInfo *vi = NULL;
+
+    const bool
+        isSupported = wxGLCanvasX11::InitXVisualInfo(attribList, &fbc, &vi);
+
+    if ( fbc )
+        XFree(fbc);
+    if ( vi )
+        XFree(vi);
+
+    return isSupported;
+}
+
 // ----------------------------------------------------------------------------
 // default visual management
 // ----------------------------------------------------------------------------
@@ -347,12 +360,13 @@ int wxGLCanvasX11::GetGLXVersion()
     return s_glxVersion;
 }
 
-void wxGLCanvasX11::SwapBuffers()
+bool wxGLCanvasX11::SwapBuffers()
 {
     const Window xid = GetXWindow();
-    wxCHECK_RET( xid, _T("window must be shown") );
+    wxCHECK2_MSG( xid, return false, _T("window must be shown") );
 
     glXSwapBuffers(wxGetX11Display(), xid);
+    return true;
 }
 
 bool wxGLCanvasX11::IsShownOnScreen() const