Clifford Wolf:

	Added OpenGL 2.0 / OpenCSG check



git-svn-id: http://svn.clifford.at/openscad/trunk@110 b57f626f-c46c-0410-a088-ec61d464b74c

3 files changed, 57 insertions, 13 deletions

diff --git a/glview.cc b/glview.cc
index 338b839..609a3c4 100644
--- a/glview.cc
+++ b/glview.cc
@@ -23,6 +23,7 @@
 #include <QApplication>
 #include <QWheelEvent>
 #include <QMouseEvent>
+#include <QMessageBox>
 
 #define FAR_FAR_AWAY 100000.0
 
@@ -53,6 +54,9 @@ GLView::GLView(QWidget *parent) : QGLWidget(parent)
 	statusLabel = NULL;
 
 	setMouseTracking(true);
+#ifdef ENABLE_OPENCSG
+	opencsg_support = true;
+#endif
 }
 
 extern GLint e1, e2, e3;
@@ -158,11 +162,23 @@ void GLView::initializeGL()
 			}
 		}
 	} else {
-		fprintf(stdout, "GLEW: GL_VERSION_2_0 is not supported!\n");
+		opencsg_support = false;
+		QTimer::singleShot(0, this, SLOT(display_opengl20_warning()));
 	}
 #endif /* ENABLE_OPENCSG */
 }
 
+#ifdef ENABLE_OPENCSG
+void GLView::display_opengl20_warning()
+{
+	QMessageBox::warning(NULL, "GLEW: GL_VERSION_2_0 is not supported!",
+			"Warning: No support for OpenGL 2.0 found! OpenCSG View has been disabled.\n\n"
+			"It is highly recommended to use OpenSCAD on a system with OpenGL 2.0 "
+			"support. Please check if OpenGL 2.0 drivers are available for your "
+			"graphics hardware.");
+}
+#endif
+
 void GLView::resizeGL(int w, int h)
 {
 #ifdef ENABLE_OPENCSG
diff --git a/mainwin.cc b/mainwin.cc
index 23357c7..7631010 100644
--- a/mainwin.cc
+++ b/mainwin.cc
@@ -153,8 +153,12 @@ MainWindow::MainWindow(const char *filename)
 	{
 		QMenu *menu = menuBar()->addMenu("&View");
 #ifdef ENABLE_OPENCSG
-		actViewModeOpenCSG = menu->addAction("OpenCSG", this, SLOT(viewModeOpenCSG()), QKeySequence(Qt::Key_F9));
-		actViewModeOpenCSG->setCheckable(true);
+		if (screen->opencsg_support) {
+			actViewModeOpenCSG = menu->addAction("OpenCSG", this, SLOT(viewModeOpenCSG()), QKeySequence(Qt::Key_F9));
+			actViewModeOpenCSG->setCheckable(true);
+		} else {
+			actViewModeOpenCSG = NULL;
+		}
 #endif
 #ifdef ENABLE_CGAL
 		actViewModeCGALSurface = menu->addAction("CGAL Surfaces", this, SLOT(viewModeCGALSurface()), QKeySequence(Qt::Key_F10));
@@ -214,6 +218,12 @@ MainWindow::MainWindow(const char *filename)
 		setWindowTitle("New Document");
 	}
 
+	setCentralWidget(s1);
+
+	// display this window and check for OpenGL 2.0 (OpenCSG) support
+	viewModeThrownTogether();
+	show();
+
 #ifdef ENABLE_OPENCSG
 	viewModeOpenCSG();
 #else
@@ -221,7 +231,6 @@ MainWindow::MainWindow(const char *filename)
 #endif
 	viewPerspective();
 
-	setCentralWidget(s1);
 	current_win = NULL;
 }
 
@@ -634,7 +643,8 @@ void MainWindow::actionReloadCompile()
 	compile(true);
 
 #ifdef ENABLE_OPENCSG
-	if (!actViewModeOpenCSG->isChecked() && !actViewModeThrownTogether->isChecked()) {
+	if (!(actViewModeOpenCSG && actViewModeOpenCSG->isChecked()) &&
+			!actViewModeThrownTogether->isChecked()) {
 		viewModeOpenCSG();
 	}
 	else
@@ -653,7 +663,8 @@ void MainWindow::actionCompile()
 	compile(!actViewModeAnimate->isChecked());
 
 #ifdef ENABLE_OPENCSG
-	if (!actViewModeOpenCSG->isChecked() && !actViewModeThrownTogether->isChecked()) {
+	if (!(actViewModeOpenCSG && actViewModeOpenCSG->isChecked()) &&
+			!actViewModeThrownTogether->isChecked()) {
 		viewModeOpenCSG();
 	}
 	else
@@ -850,7 +861,8 @@ void MainWindow::actionExportOFF()
 void MainWindow::viewModeActionsUncheck()
 {
 #ifdef ENABLE_OPENCSG
-	actViewModeOpenCSG->setChecked(false);
+	if (actViewModeOpenCSG)
+		actViewModeOpenCSG->setChecked(false);
 #endif
 #ifdef ENABLE_CGAL
 	actViewModeCGALSurface->setChecked(false);
@@ -954,11 +966,19 @@ static void renderGLviaOpenCSG(void *vp)
 
 void MainWindow::viewModeOpenCSG()
 {
-	viewModeActionsUncheck();
-	actViewModeOpenCSG->setChecked(true);
-	screen->renderfunc = renderGLviaOpenCSG;
-	screen->renderfunc_vp = this;
-	screen->updateGL();
+	if (screen->opencsg_support) {
+		viewModeActionsUncheck();
+		actViewModeOpenCSG->setChecked(true);
+		screen->renderfunc = renderGLviaOpenCSG;
+		screen->renderfunc_vp = this;
+		screen->updateGL();
+	} else {
+		if (actViewModeOpenCSG) {
+			delete actViewModeOpenCSG;
+			actViewModeOpenCSG = NULL;
+		}
+		viewModeThrownTogether();
+	}
 }
 
 #endif /* ENABLE_OPENCSG */
diff --git a/openscad.h b/openscad.h
index c090ccf..6a365df 100644
--- a/openscad.h
+++ b/openscad.h
@@ -663,6 +663,9 @@ public:
 	GLint shaderinfo[11];
 
 	QLabel *statusLabel;
+#ifdef ENABLE_OPENCSG
+	bool opencsg_support;
+#endif
 
 	GLView(QWidget *parent = NULL);
 
@@ -680,6 +683,11 @@ protected:
 	void initializeGL();
 	void resizeGL(int w, int h);
 	void paintGL();
+
+#ifdef ENABLE_OPENCSG
+private slots:
+	void display_opengl20_warning();
+#endif
 };
 
 class MainWindow : public QMainWindow
@@ -773,7 +781,7 @@ public:
 	QAction *actViewOrthogonal;
 	void viewModeActionsUncheck();
 
-private slots:
+public slots:
 #ifdef ENABLE_OPENCSG
 	void viewModeOpenCSG();
 #endif