public override void Draw (Gdk.Rectangle viewport, Texture previous, Texture next)
{
for (int i = 0; i < color.Length; i++)
color [i] = percent;
bool supported = GlExtensionLoader.LoadExtension ("GL_ARB_multitexture");
if (!supported) {
System.Console.WriteLine ("GL_ARB_multitexture not supported");
return;
}
Gl.glViewport (0, 0, viewport.Width, viewport.Height);
Gl.glMatrixMode (Gl.GL_PROJECTION);
Gl.glLoadIdentity ();
Glu.gluOrtho2D (0, viewport.Width, 0, viewport.Height);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glLoadIdentity ();
Gl.glDisable (Gl.GL_TEXTURE_RECTANGLE_ARB);
Gl.glActiveTextureARB (Gl.GL_TEXTURE0);
Gl.glEnable (Gl.GL_TEXTURE_RECTANGLE_ARB);
//Gl.glTexEnvi(Gl.GL_TEXTURE_ENV, Gl.GL_TEXTURE_ENV_MODE, Gl.GL_REPLACE);
next.Bind ();
Fit (viewport, next);
Gl.glActiveTextureARB (Gl.GL_TEXTURE1);
//Gl.glDisable (Gl.GL_TEXTURE_RECTANGLE_ARB);
Gl.glEnable (Gl.GL_TEXTURE_RECTANGLE_ARB);
previous.Bind ();
Fit (viewport, previous);
Gl.glTexEnvi (Gl.GL_TEXTURE_ENV, Gl.GL_TEXTURE_ENV_MODE, Gl.GL_COMBINE);
Gl.glTexEnvf (Gl.GL_TEXTURE_ENV, Gl.GL_COMBINE_RGB, Gl.GL_INTERPOLATE);
Gl.glTexEnvfv (Gl.GL_TEXTURE_ENV,
Gl.GL_TEXTURE_ENV_COLOR,
color);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glBegin (Gl.GL_QUADS);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE0, 0, 0);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE1, 0, 0);
Gl.glVertex3f (0, viewport.Height, 0);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE0, next.Width, 0);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE1, previous.Width, 0);
Gl.glVertex3f (viewport.Width, viewport.Height, 0);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE0, next.Width, next.Height);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE1, previous.Width, previous.Height);
Gl.glVertex3f (viewport.Width, 0, 0);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE0, 0, next.Height);
Gl.glMultiTexCoord2fARB (Gl.GL_TEXTURE1, 0, previous.Height);
Gl.glVertex3f (0, 0, 0);
Gl.glEnd ();
Gl.glDisable (Gl.GL_TEXTURE_RECTANGLE_ARB);
Gl.glActiveTextureARB (Gl.GL_TEXTURE0);
}
private void PreloadNext ()
{
if (next == null)
next = CreateTexture ();
}
private Texture CreateTexture ()
{
if (glx == null || GdkWindow == null)
return null;
glx.MakeCurrent (GdkWindow);
Texture tex;
try {
using (ImageFile img = ImageFile.Create (item.Current.DefaultVersionUri)) {
using (Gdk.Pixbuf pixbuf = img.Load ()) {
tex = new Texture (pixbuf);
}
}
} catch (Exception) {
tex = new Texture (PixbufUtils.ErrorPixbuf);
}
return tex;
}
private void PreloadNext ()
{
Next = CreateTexture ();
}
public override void Draw (Gdk.Rectangle viewport, Texture previous, Texture next)
{
Gl.glViewport (0, 0, viewport.Width, viewport.Height);
Gl.glMatrixMode (Gl.GL_PROJECTION);
Gl.glLoadIdentity ();
Glu.gluOrtho2D (0, viewport.Width, 0, viewport.Height);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glLoadIdentity ();
Gl.glPushMatrix ();
Gl.glTranslatef (viewport.Width - viewport.Width * percent, 0, 0);
RenderPlane (viewport, previous);
Gl.glPopMatrix ();
Gl.glPushMatrix ();
Gl.glTranslatef (-viewport.Width * percent, 0, 0);
RenderPlane (viewport, next);
Gl.glPopMatrix ();
}
protected static void Fit (Gdk.Rectangle viewport, Texture texture)
{
float va = viewport.Width / (float) viewport.Height;
float ta = texture.Width / (float) texture.Height;
Gl.glMatrixMode (Gl.GL_TEXTURE);
Gl.glLoadIdentity ();
if (ta > va)
Gl.glScalef (va/ta, 1, 0);
else
Gl.glScalef (1, ta/va, 0);
}
protected void RenderPlane (Gdk.Rectangle viewport, Texture previous)
{
previous.Bind ();
Fit (viewport, previous);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glBegin (Gl.GL_QUADS);
Gl.glTexCoord2f (0, 0);
Gl.glVertex3f (0, viewport.Height, 0);
Gl.glTexCoord2f (previous.Width, 0);
Gl.glVertex3f (viewport.Width, viewport.Height, 0);
Gl.glTexCoord2f (previous.Width, previous.Height);
Gl.glVertex3f (viewport.Width, 0, 0);
Gl.glTexCoord2f (0, previous.Height);
Gl.glVertex3f (0, 0, 0);
Gl.glEnd ();
}
public override void Draw (Gdk.Rectangle viewport, Texture previous, Texture next)
{
Gl.glViewport (0, 0, viewport.Width, viewport.Height);
Gl.glMatrixMode (Gl.GL_PROJECTION);
Gl.glLoadIdentity ();
Glu.gluPerspective (40, viewport.Width / (float) viewport.Height, 0.1, 50.0);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glLoadIdentity ();
Glu.gluLookAt (0.0, 0.0, 3.0,
0.0, 0.0, 0.0,
0.0, 1.0, 0.0);
Gl.glTranslatef (0, 0, -3);
Gl.glPushMatrix ();
Gl.glTranslatef (0, 0, 0.5f);
Texture t = previous;
t.Bind ();
RenderPlane (new Gdk.Rectangle (-2, -1, 2, 2), t);
Gl.glBegin (Gl.GL_QUADS);
Gl.glTexCoord2f (0, 0);
Gl.glVertex3f (-2, -1, 0);
Gl.glTexCoord2f (t.Width, 0);
Gl.glVertex3f (-2, 1, 0);
Gl.glTexCoord2f (t.Width, t.Height);
Gl.glVertex3f (0, 1, 0);
Gl.glTexCoord2f (0, t.Height);
Gl.glVertex3f (0, -1, 0);
Gl.glEnd ();
next.Bind ();
Gl.glBegin (Gl.GL_QUADS);
Gl.glTexCoord2f (0, 0);
Gl.glVertex3f (1, -1, 0);
Gl.glTexCoord2f (next.Width, 0);
Gl.glVertex3f (1, 1, 0);
Gl.glTexCoord2f (next.Width, next.Height);
Gl.glVertex3f (2.41421f, 1, -1.41421f);
Gl.glTexCoord2f (0, next.Height);
Gl.glVertex3f (2.41421f, -1, -1.41421f);
Gl.glEnd ();
}
public virtual void Draw (Gdk.Rectangle viewport, Texture start, Texture end)
{
throw new ApplicationException ("the world has come undone");
}
public override void Draw (Gdk.Rectangle viewport, Texture previous, Texture next)
{
Gl.glViewport (0, 0, viewport.Width, viewport.Height);
Gl.glMatrixMode (Gl.GL_PROJECTION);
Gl.glLoadIdentity ();
Glu.gluOrtho2D (0, viewport.Width, 0, viewport.Height);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glLoadIdentity ();
//Gl.glPushMatrix ();
//RenderPlane (viewport, next);
//Gl.glPopMatrix ();
Gl.glPushMatrix ();
//RenderPlane (viewport, next);
//previous.Bind ();
//Fit (viewport, previous);
//Gl.glTexEnvi (Gl.GL_TEXTURE_ENV, Gl.GL_TEXTURE_ENV_MODE, Gl.GL_COMBINE);
//Gl.glTexEnvf (Gl.GL_TEXTURE_ENV, Gl.GL_COMBINE_RGB, Gl.GL_INTERPOLATE);
//float [] color = new float [] { 0, 0, 0, percent};
//Gl.glTexEnvfv (Gl.GL_TEXTURE_ENV,
// Gl.GL_TEXTURE_ENV_COLOR,
// color);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glDisable (Gl.GL_TEXTURE_RECTANGLE_ARB);
Gl.glBegin (Gl.GL_QUADS);
Gl.glShadeModel (Gl.GL_SMOOTH);
//Gl.glTexCoord2f (0, 0);
Gl.glColor4f (1, 1, 1, 0);
Gl.glVertex3f (0, viewport.Height, .5f);
//Gl.glTexCoord2f (previous.Width, 0);
Gl.glColor4f (1, 1, 1, .5f);
Gl.glVertex3f (viewport.Width, viewport.Height, .5f);
//Gl.glTexCoord2f (previous.Width, previous.Height);
Gl.glColor4f (1, 0, 1, .5f);
Gl.glVertex3f (viewport.Width, 0, .5f);
//Gl.glTexCoord2f (0, previous.Height);
Gl.glColor4f (1, 1, 1, 1);
Gl.glVertex3f (0, 0, .5f);
Gl.glPopMatrix ();
Gl.glEnd ();
}
public override void Draw (Gdk.Rectangle viewport, Texture previous, Texture next)
{
Gl.glMatrixMode (Gl.GL_MODELVIEW);
Gl.glLoadIdentity ();
Gl.glViewport (0, 0, viewport.Width, viewport.Height);
Glu.gluLookAt (0, 0, 2,
0, 0, 0,
0, 1, 1);
Gl.glRotatef (90 * -percent, 0, 1, 0);
Gl.glMatrixMode (Gl.GL_PROJECTION);
Gl.glLoadIdentity ();
double fov = 360 * Math.Atan2 (viewport.Height * .5 / (double) viewport.Width, 1.5) / Math.PI;
Glu.gluPerspective (fov, viewport.Width / (double) viewport.Height, 1.1, 15);
Gl.glMatrixMode (Gl.GL_MODELVIEW);
float scale = 1f/viewport.Width;
Gl.glScalef (scale, scale, scale);
Gl.glPushMatrix ();
Gl.glTranslatef (-viewport.Width *.5f, -viewport.Height * .5f, viewport.Width *.5f);
RenderPlane (viewport, next);
Gl.glRotatef (90, 0, 1, 0);
Gl.glTranslatef (0, 0, viewport.Width);
RenderPlane (viewport, previous);
Gl.glPopMatrix ();
}
protected static void Fit (Gdk.Rectangle viewport, Texture texture)
{
float aspect_scale = (texture.Width / (float) texture.Height) / (viewport.Width / (float) viewport.Height);
float size_scale = Math.Max (viewport.Width / (float) texture.Width, viewport.Height / (float) texture.Height);
bool both_smaller = (viewport.Width / (float) texture.Width) > 1 && (viewport.Height / (float) texture.Height) > 1;
Gl.glMatrixMode (Gl.GL_TEXTURE);
Gl.glLoadIdentity ();
// If the image is smaller than the viewport, center it
if (both_smaller) {
Gl.glTranslatef (-0.5f * (viewport.Width - texture.Width), -0.5f * (viewport.Height - texture.Height), 0);
}
// Adjust for aspect ratio differences
if (aspect_scale == 1) {
// ignore
} else if (aspect_scale < 1) {
size_scale *= aspect_scale;
Gl.glScalef (1 / aspect_scale, 1, 0);
if (!both_smaller) {
Gl.glTranslatef (-0.5f * texture.Width * (1.0f - aspect_scale), 0, 0);
}
} else {
size_scale /= aspect_scale;
Gl.glScalef (1, aspect_scale, 0);
if (!both_smaller) {
Gl.glTranslatef (0, -0.5f * texture.Height * (1.0f - 1.0f/aspect_scale), 0);
}
}
// If the image is smaller than the viewport, ensure it's not stretched
if (both_smaller) {
Gl.glScalef (size_scale, size_scale, 0);
}
}