/// <summary>
/// Checks if all of the pixels in the column (within the bounds of the rectangle) match the specified color.
/// </summary>
private static bool IsConstantColumn(ImageSurface surf, Cairo.Color color, Gdk.Rectangle rect, int x)
{
for (int y = rect.Top; y < rect.Bottom; ++y)
{
if (!color.Equals(surf.GetPixel(x, y)))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Checks if all of the pixels in the row match the specified color.
/// </summary>
private static bool IsConstantRow(ImageSurface surf, Cairo.Color color, int y)
{
for (int x = 0; x < surf.Width; ++x)
{
if (!color.Equals(surf.GetPixel(x, y)))
{
return(false);
}
}
return(true);
}
private void HandlePintaCoreActionsImageAutoCropActivated (object sender, EventArgs e)
{
Document doc = PintaCore.Workspace.ActiveDocument;
PintaCore.Tools.Commit ();
using (var image = doc.GetFlattenedImage ())
{
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);
// Ignore the current selection when auto-cropping.
CropImageToRectangle (doc, rect, /*selection*/ null);
}
}
