protected unsafe override void OnMouseMove(Document document, ToolMouseEventArgs e)
{
ColorBgra old_color;
ColorBgra new_color;
// This should have been created in OnMouseDown
if (stencil is null)
{
return;
}
if (mouse_button == MouseButton.Left)
{
old_color = Palette.PrimaryColor.ToColorBgra();
new_color = Palette.SecondaryColor.ToColorBgra();
}
else if (mouse_button == MouseButton.Right)
{
old_color = Palette.SecondaryColor.ToColorBgra();
new_color = Palette.PrimaryColor.ToColorBgra();
}
else
{
last_point = point_empty;
return;
}
var x = e.Point.X;
var y = e.Point.Y;
if (last_point.Equals(point_empty))
{
last_point = new Point(x, y);
}
if (document.Workspace.PointInCanvas(e.PointDouble))
{
surface_modified = true;
}
var surf = document.Layers.CurrentUserLayer.Surface;
var tmp_layer = document.Layers.ToolLayer.Surface;
var roi = CairoExtensions.GetRectangleFromPoints(last_point, new Point(x, y), BrushWidth + 2);
roi = workspace.ClampToImageSize(roi);
var myTolerance = (int)(Tolerance * 256);
tmp_layer.Flush();
var tmp_data_ptr = (ColorBgra *)tmp_layer.DataPtr;
var tmp_width = tmp_layer.Width;
var surf_data_ptr = (ColorBgra *)surf.DataPtr;
var surf_width = surf.Width;
// The stencil lets us know if we've already checked this
// pixel, providing a nice perf boost
// Maybe this should be changed to a BitVector2DSurfaceAdapter?
for (var i = roi.X; i <= roi.GetRight(); i++)
{
for (var j = roi.Y; j <= roi.GetBottom(); j++)
{
if (stencil[i, j])
{
continue;
}
if (ColorBgra.ColorsWithinTolerance(new_color, surf.GetColorBgraUnchecked(surf_data_ptr, surf_width, i, j), myTolerance))
{
*tmp_layer.GetPointAddressUnchecked(tmp_data_ptr, tmp_width, i, j) = AdjustColorDifference(new_color, old_color, surf.GetColorBgraUnchecked(surf_data_ptr, surf_width, i, j));
}
stencil[i, j] = true;
}
}
tmp_layer.MarkDirty();
using (var g = document.CreateClippedContext()) {
g.Antialias = UseAntialiasing ? Antialias.Subpixel : Antialias.None;
g.MoveTo(last_point.X, last_point.Y);
g.LineTo(x, y);
g.LineWidth = BrushWidth;
g.LineJoin = LineJoin.Round;
g.LineCap = LineCap.Round;
g.SetSource(tmp_layer);
g.Stroke();
}
document.Workspace.Invalidate(roi);
last_point = new Point(x, y);
}