public override void Fill(AnnContainer container, LeadRectD bounds, string color)
{
if (_image == null)
{
return;
}
try
{
var fill = new FillCommand(RasterColor.Black);
_image.AddRectangleToRegion(null, bounds.ToLeadRect(), RasterRegionCombineMode.Set);
fill.Run(_image);
}
finally
{
_image.MakeRegionEmpty();
}
}
private void _invertImageUnderOverlayRectButton_Click(object sender, EventArgs e)
{
RasterImage image = _imageViewer.Image;
// Add the overlay rect as a region to the image
// The overlay rect is in image coordinates already but it is at top-left
// view perspective, the image might not be. If you load a BMP file or click
// the fast rotate buttons, you will notice this.
// We can do one of two things:
// 1. Use RasterRegionXForm to tell the AddRectangleToRegion method the
// rect passed is in TopLeft:
/*
* RasterRegionXForm xForm = RasterRegionXForm.Default;
* xForm.ViewPerspective = RasterViewPerspective.TopLeft;
* image.AddRectangleToRegion(xForm, _overlayRect, RasterRegionCombineMode.Set);
*/
// RasterRegionXForm is a matrix that allows you to perform many more actions,
// such as transform the rectangle from any coordinates to another.
// 2. Use RasterImage.RectangleToImage to convert the rect from TopLeft
// to the view perspective of the image:
LeadRect dataRect = image.RectangleToImage(RasterViewPerspective.TopLeft, _overlayRect);
image.AddRectangleToRegion(null, dataRect, RasterRegionCombineMode.Set);
InvertCommand cmd = new InvertCommand();
cmd.Run(image);
// Remove the region
image.MakeRegionEmpty();
}