public static Gdk.Pixbuf FadeIcon(Gdk.Pixbuf source)
{
Gdk.Pixbuf result = source.Copy ();
result.Fill (0);
result = result.AddAlpha (true, 0, 0, 0);
source.Composite (result, 0, 0, source.Width, source.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, 128);
return result;
}
public static Gdk.Pixbuf AddIconOverlay(Gdk.Pixbuf target, Gdk.Pixbuf overlay)
{
Gdk.Pixbuf res = new Gdk.Pixbuf (target.Colorspace, target.HasAlpha, target.BitsPerSample, target.Width, target.Height);
res.Fill (0);
target.CopyArea (0, 0, target.Width, target.Height, res, 0, 0);
overlay.Composite (res, 0, 0, overlay.Width, overlay.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, 255);
return res;
}
void AddOverlay (ref Gdk.Pixbuf icon, Gdk.Pixbuf overlay)
{
Gdk.Pixbuf cached = Context.GetComposedIcon (icon, overlay);
if (cached != null) {
icon = cached;
return;
}
int dx = 2;
int dy = 2;
Gdk.Pixbuf res = new Gdk.Pixbuf (icon.Colorspace, icon.HasAlpha, icon.BitsPerSample, icon.Width + dx, icon.Height + dy);
res.Fill (0);
icon.CopyArea (0, 0, icon.Width, icon.Height, res, 0, 0);
overlay.Composite (res,
res.Width - overlay.Width, res.Height - overlay.Height,
overlay.Width, overlay.Height,
res.Width - overlay.Width, res.Height - overlay.Height,
1, 1, Gdk.InterpType.Bilinear, 255);
Context.CacheComposedIcon (icon, overlay, res);
icon = res;
}
//caller should check null and that sizes match
static Gdk.Pixbuf MergeIcons (Gdk.Pixbuf icon1, Gdk.Pixbuf icon2)
{
Gdk.Pixbuf res = new Gdk.Pixbuf (icon1.Colorspace, icon1.HasAlpha, icon1.BitsPerSample, icon1.Width, icon1.Height);
res.Fill (0);
icon1.CopyArea (0, 0, icon1.Width, icon1.Height, res, 0, 0);
icon2.Composite (res, 0, 0, icon2.Width, icon2.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, 255);
return res;
}
public static Gdk.Pixbuf MakeTransparent (Gdk.Pixbuf icon, double opacity)
{
Gdk.Pixbuf result = icon.Copy ();
result.Fill (0);
result = result.AddAlpha (true, 0, 0, 0);
icon.Composite (result, 0, 0, icon.Width, icon.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, (int)(256 * opacity));
return result;
}
public static Gdk.Pixbuf ScaleToAspect (Gdk.Pixbuf orig, int width, int height)
{
Gdk.Rectangle pos;
double scale = Fit (orig, width, height, false, out pos.Width, out pos.Height);
pos.X = (width - pos.Width) / 2;
pos.Y = (height - pos.Height) / 2;
Pixbuf scaled = new Pixbuf (Colorspace.Rgb, false, 8, width, height);
scaled.Fill (0x000000);
orig.Composite (scaled, pos.X, pos.Y,
pos.Width, pos.Height,
pos.X, pos.Y, scale, scale,
Gdk.InterpType.Bilinear,
255);
return scaled;
}
public static Gdk.Pixbuf CreateEmblemedPixbuf(Gdk.Pixbuf icon, Gdk.Pixbuf emblem)
{
if (icon == null || emblem == null) return null;
if (icon.Width <= emblem.Width || icon.Height <= emblem.Height) return null;
Gdk.Pixbuf dest = new Gdk.Pixbuf(icon.Colorspace, true, icon.BitsPerSample, icon.Width, icon.Height);
dest.Fill(0x00000000);
try
{
icon.Composite(dest,
0,
0,
dest.Width,
dest.Height,
0,
0,
1.0,
1.0,
Gdk.InterpType.Bilinear,
255);
emblem.Composite(dest,
icon.Width - emblem.Width - 1,
icon.Height - emblem.Height - 1,
emblem.Width,
emblem.Height,
icon.Width - emblem.Width - 1,
icon.Height - emblem.Height - 1,
1.0,
1.0,
Gdk.InterpType.Bilinear,
255);
}
catch(Exception e)
{
dest = null;
}
return dest;
}
public Gdk.Pixbuf MakeTransparent(Gdk.Pixbuf icon, double opacity)
{
// If somebody knows a better way of doing this, please redo.
Gdk.Pixbuf gicon = icon.Copy ();
gicon.Fill (0);
gicon = gicon.AddAlpha (true,0,0,0);
icon.Composite (gicon, 0, 0, icon.Width, icon.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, (int)(256 * opacity));
return gicon;
}
Gdk.Pixbuf ExpandImageVertically (Gdk.Pixbuf img, int newHeight)
{
if (newHeight <= img.Height)
return img.Copy ();
var res = new Gdk.Pixbuf (img.Colorspace, img.HasAlpha, img.BitsPerSample, img.Width, newHeight);
var h1 = img.Height / 2;
var h2 = img.Height - h1;
res.Fill (0xff000000);
img.Composite (res, 0, h1, res.Width, newHeight - img.Height, 0, 0, 1, (double)newHeight / (double)img.Height, InterpType.Bilinear, 255);
img.Composite (res, 0, 0, img.Width, h1, 0, 0, 1, 1, InterpType.Bilinear, 255);
img.Composite (res, 0, newHeight - h2, img.Width, h2, 0, newHeight - img.Height, 1, 1, InterpType.Bilinear, 255);
return res;
}
//caller should check that sizes match
public static Gdk.Pixbuf MergeIcons (Gdk.Pixbuf icon1, Gdk.Pixbuf icon2)
{
if (icon2 == null)
return icon1;
if (icon1 == null)
return icon2;
Gdk.Pixbuf res = new Gdk.Pixbuf (icon1.Colorspace, icon1.HasAlpha, icon1.BitsPerSample, icon1.Width, icon1.Height);
res.Fill (0);
icon1.CopyArea (0, 0, icon1.Width, icon1.Height, res, 0, 0);
icon2.Composite (res, 0, 0, icon2.Width, icon2.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, 255);
var icon1_2x = Get2xIconVariant (icon1);
var icon2_2x = Get2xIconVariant (icon2);
if (icon1_2x != null || icon2_2x != null) {
if (icon1_2x == null)
icon1_2x = ScaleIcon (icon1, icon1.Width * 2, icon1.Height * 2);
if (icon2_2x == null)
icon2_2x = ScaleIcon (icon2, icon2.Width * 2, icon2.Height * 2);
var res2x = MergeIcons (icon1_2x, icon2_2x);
Set2xIconVariant (res, res2x);
}
return res;
}