private void HandlePintaCoreActionsImageAutoCropActivated(object sender, EventArgs e)
{
Document doc = PintaCore.Workspace.ActiveDocument;
PintaCore.Tools.Commit();
Cairo.ImageSurface image = doc.CurrentUserLayer.Surface;
Gdk.Rectangle rect = image.GetBounds();
Cairo.Color borderColor = image.GetPixel(0, 0);
bool cropSide = true;
int depth = -1;
//From the top down
while (cropSide)
{
depth++;
for (int i = 0; i < image.Width; i++)
{
if (!borderColor.Equals(image.GetPixel(i, depth)))
{
cropSide = false;
break;
}
}
//Check if the image is blank/mono-coloured, only need to do it on this scan
if (depth == image.Height)
{
return;
}
}
rect = new Gdk.Rectangle(rect.X, rect.Y + depth, rect.Width, rect.Height - depth);
depth = image.Height;
cropSide = true;
//From the bottom up
while (cropSide)
{
depth--;
for (int i = 0; i < image.Width; i++)
{
if (!borderColor.Equals(image.GetPixel(i, depth)))
{
cropSide = false;
break;
}
}
}
rect = new Gdk.Rectangle(rect.X, rect.Y, rect.Width, depth - rect.Y);
depth = 0;
cropSide = true;
//From left to right
while (cropSide)
{
depth++;
for (int i = 0; i < image.Height; i++)
{
if (!borderColor.Equals(image.GetPixel(depth, i)))
{
cropSide = false;
break;
}
}
}
rect = new Gdk.Rectangle(rect.X + depth, rect.Y, rect.Width - depth, rect.Height);
depth = image.Width;
cropSide = true;
//From right to left
while (cropSide)
{
depth--;
for (int i = 0; i < image.Height; i++)
{
if (!borderColor.Equals(image.GetPixel(depth, i)))
{
cropSide = false;
break;
}
}
}
rect = new Gdk.Rectangle(rect.X, rect.Y, depth - rect.X, rect.Height);
CropImageToRectangle(doc, rect);
}
