public SlideImage GetSlideThumbnail(int width, int height, bool copyTitle)
{
SlideImage newImage = new SlideImage();
newImage.CopyProperties(this);
using(DataImageSurface thumbnail = this.GetThumbnail(width, height, copyTitle)) {
newImage.FromDataImageSurface(thumbnail);
}
return newImage;
}
protected SlideImage CreateImage(int points, double radius)
{
double percentage;
percentage = ((1d / Frames) * CurrentFrame);
SlideImage image = new SlideImage ();
image.CopyProperties (Source);
image.Pixels = new byte [Target.Stride * Target.Height];
SlideImage draw_image = new SlideImage ();
double cx = Convert.ToInt32 ((Source.Width / 2));
double cy = Convert.ToInt32 ((Source.Height / 2));
double r1 = Target.Width * percentage;
double r2 = Target.Width * percentage * 0.5;
DataImageSurface draw = Source.ToDataImageSurface ();
using (Context gr = new Context (draw))
{
// First paint in black the image.
gr.Save ();
gr.MoveTo (0,0);
gr.LineTo (Target.Width, 0);
gr.LineTo (Target.Width, Target.Height);
gr.LineTo (0, Source.Height);
gr.ClosePath ();
gr.Color = new Color (0,0,0);
gr.Fill ();
gr.Save ();
double x, y;
double x1, y1;
// Draw the points of the star, creating a path with a line
for (int i = 0; i < points; i = i + 2)
{
x = cx + (r1 * System.Math.Cos (i * radius - System.Math.PI / 2));
y = cy + (r1 * System.Math.Sin (i * radius - System.Math.PI / 2));
gr.LineTo (new PointD (x, y));
x1 = cx + (r2 * System.Math.Cos ((i + 1) * radius - System.Math.PI / 2));
y1 = cy + (r2 * System.Math.Sin ((i + 1) * radius - System.Math.PI / 2));
gr.LineTo (new PointD (x1, y1));
}
gr.ClosePath ();
// Fill the resulting polygon with a color
gr.Color = new Color (1, 115, 0);
gr.Fill ();
gr.Restore ();
draw_image.FromDataImageSurface (draw);
bool sourced = percentage < 0.5;
if (sourced)
Array.Copy (Source.Pixels, image.Pixels, Source.Stride * Source.Height);
else
Array.Copy (Target.Pixels, image.Pixels, Target.Stride * Target.Height);
// Draw target image to the star
// Compare Target picture with the temporary
// If in the temporary we have found a black pixel, draw a pixel from the Source slide
// If in the temporary we have found a non-black pixel, draw a pixel from the Target slide
for (int h = 0; h < Target.Height; h++)
{
int pos = h * Target.Stride;
int pos_draw = h * draw_image.Stride;
for (int w = 0; w < Target.Width; w++)
{
if (draw_image.Pixels[pos_draw] != 0) {
if (sourced) {
for (int c = 0; c < Target.Channels; c++)
{
image.Pixels[pos + c] = Target.Pixels[pos + c];
}
}
}else{
if (sourced == false) {
for (int c = 0; c < Target.Channels; c++)
{
image.Pixels[pos + c] = Source.Pixels[pos + c];
}
}
}
pos += Target.Channels;
pos_draw += draw_image.Channels;
}
}
}
((IDisposable) draw).Dispose ();
return image;
}