added Flip mode (in progress)

dwss.cc

@@ -35,7 +35,8 @@ int main (int argc, char *argv[])
     GnomeScreensaver gs(&argc, &argv, configure, expose, update, 12);
 
     Mode *modes[] = {
-        new Spin()
+        new Spin(),
+        new Flip()
     };
 
     glShadeModel(GL_SMOOTH);

modes/Flip.cc

@@ -0,0 +1,64 @@
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#include "Flip.h"
+
+#define FLIP_TICKS 1000
+#define STATIC_TICKS 200
+#define SPAN_Y 5
+
+Flip::Flip()
+{
+    m_state = WAITING;
+    m_span_x = 6;
+    m_span_y = 5;
+}
+
+bool Flip::expose (GnomeScreensaver & gs)
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    glPushMatrix();
+
+    glTranslatef(m_x, m_y, 0.0);
+    m_logobox.draw();
+
+    glPopMatrix();
+
+    return true;
+}
+
+bool Flip::configure (GnomeScreensaver & gs)
+{
+    glViewport(0, 0, gs.getWidth(), gs.getHeight());
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    gluPerspective(60.0, gs.getAspectRatio(), 0.01, 1000.0);
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    gluLookAt(0, 0, SPAN_Y * m_logobox.getDepth(), 0, 0, 0, 0, 1, 0);
+
+    m_span_x = (int) (m_span_y * gs.getAspectRatio()
+        / (m_logobox.getWidth() / m_logobox.getDepth()) + 0.5);
+    m_y = 0.0f;
+    m_x = -(1 - (m_span_x & 0x1)) * m_logobox.getWidth() / 2.0;
+    m_last_ticks = gs.getTicks();
+
+    return true;
+}
+
+bool Flip::update (GnomeScreensaver & gs)
+{
+    switch (m_state)
+    {
+        case WAITING:
+            break;
+        case FLIPPING:
+            break;
+    }
+    return true;
+}
+

modes/Flip.h

@@ -0,0 +1,31 @@
+
+#ifndef FLIP_H
+#define FLIP_H
+
+#include "LogoBox.h"
+#include "Mode.h"
+#include "GnomeScreensaver.h"
+
+class Flip : public Mode
+{
+    public:
+        typedef enum
+        {
+            WAITING,
+            FLIPPING
+        } State;
+        Flip();
+        bool expose (GnomeScreensaver & gs);
+        bool configure (GnomeScreensaver & gs);
+        bool update (GnomeScreensaver & gs);
+    protected:
+        LogoBox m_logobox;
+        State m_state;
+        int m_span_x, m_span_y;
+        float m_x, m_y;
+        int m_flip_direction;
+        int m_last_ticks;
+};
+
+#endif /* FLIP_H */
+