/// <summary>
/// Redraws the screenShot
/// </summary>
/// <param name="highlightIndex">Which of the labels should be highlighted, -1 for none.</param>
/// <param name="showLabels">Show set label rectangles.</param>
/// <param name="whiteThreshold">Preview of white-Threshold. -1 to disable.</param>
/// <param name="manualRectangle">draw a custom rectangle</param>
private void RedrawScreenshot(int highlightIndex = -1, bool showLabels = true, int whiteThreshold = -1, Rectangle manualRectangle = default)
{
if (_screenshot == null ||
OCRDebugLayoutPanel.Controls.Count == 0 ||
!(OCRDebugLayoutPanel.Controls[OCRDebugLayoutPanel.Controls.Count - 1] is PictureBox p)
)
{
return;
}
_redrawingDebouncer.Cancel();
Bitmap b = new Bitmap((whiteThreshold >= 0 ? ArkOcr.RemovePixelsUnderThreshold(ArkOcr.GetGreyScale(_screenshot), (byte)whiteThreshold, true) : _screenshot));
if (showLabels || !manualRectangle.IsEmpty)
{
using (Graphics g = Graphics.FromImage(b))
using (Pen penW = new Pen(Color.White, 2))
using (Pen penY = new Pen(Color.Yellow, 2))
using (Pen penB = new Pen(Color.Black, 2))
{
penW.Alignment = System.Drawing.Drawing2D.PenAlignment.Inset;
penY.Alignment = System.Drawing.Drawing2D.PenAlignment.Inset;
penB.Alignment = System.Drawing.Drawing2D.PenAlignment.Inset;
if (!manualRectangle.IsEmpty)
{
var rec = manualRectangle;
rec.Inflate(2, 2);
g.DrawRectangle(penY, rec);
rec.Inflate(2, 2);
g.DrawRectangle(penB, rec);
}
else
{
for (int r = 0; r < ArkOcr.Ocr.ocrConfig.labelRectangles.Length; r++)
{
var rec = ArkOcr.Ocr.ocrConfig.labelRectangles[r];
rec.Inflate(2, 2);
g.DrawRectangle(r == highlightIndex ? penY : penW, rec);
rec.Inflate(2, 2);
g.DrawRectangle(penB, rec);
}
}
}
var magnifiedRectangle = highlightIndex != -1
? ArkOcr.Ocr.ocrConfig.labelRectangles[highlightIndex]
: !manualRectangle.IsEmpty
? manualRectangle
: Rectangle.Empty;
if (!magnifiedRectangle.IsEmpty)
{
var currentWhiteThreshold = Properties.Settings.Default.OCRWhiteThreshold;
var magnifiedMarginBottom = -1;
var magnifiedMarginTop = -1;
const int recMargin = 30;
if (magnifiedRectangle.Y - OCRDebugLayoutPanel.VerticalScroll.Value >
OCRDebugLayoutPanel.Height / 2)
{
magnifiedMarginTop = recMargin + OCRDebugLayoutPanel.VerticalScroll.Value;
}
else
{
magnifiedMarginBottom = OCRDebugLayoutPanel.Height < b.Height
? b.Height - OCRDebugLayoutPanel.Height + recMargin - OCRDebugLayoutPanel.VerticalScroll.Value
: recMargin;
}
DrawMagnifiedRectangle(b, magnifiedRectangle, currentWhiteThreshold, magnifiedMarginTop, magnifiedMarginBottom);
}
}
Bitmap disp = (Bitmap)p.Image; // take pointer to old image to dispose it soon
p.Image = b;
if (disp != null && disp != _screenshot)
{
disp.Dispose();
}
}