protected override Gdk.Rectangle OnMouseMove (Context g, Color strokeColor, ImageSurface surface,
int x, int y, int lastX, int lastY)
{
// Cairo does not support a single-pixel-long single-pixel-wide line
if (x == lastX && y == lastY && g.LineWidth == 1 &&
PintaCore.Workspace.ActiveWorkspace.PointInCanvas (new PointD(x,y))) {
surface.Flush ();
ColorBgra source = surface.GetColorBgraUnchecked (x, y);
source = UserBlendOps.NormalBlendOp.ApplyStatic (source, strokeColor.ToColorBgra ());
surface.SetColorBgra (source, x, y);
surface.MarkDirty ();
return new Gdk.Rectangle (x - 1, y - 1, 3, 3);
}
g.MoveTo (lastX + 0.5, lastY + 0.5);
g.LineTo (x + 0.5, y + 0.5);
g.StrokePreserve ();
Gdk.Rectangle dirty = g.FixedStrokeExtents ().ToGdkRectangle ();
// For some reason (?!) we need to inflate the dirty
// rectangle for small brush widths in zoomed images
dirty.Inflate (1, 1);
return dirty;
}
private void Draw(DrawingArea drawingarea1, Color tool_color, Cairo.PointD point, bool first_pixel)
{
int x = (int)point.X;
int y = (int) point.Y;
if (last_point.Equals (point_empty)) {
last_point = new Point (x, y);
if (!first_pixel)
return;
}
Document doc = PintaCore.Workspace.ActiveDocument;
if (doc.Workspace.PointInCanvas (point))
surface_modified = true;
ImageSurface surf = PintaCore.Layers.CurrentLayer.Surface;
if (first_pixel) {
// Does Cairo really not support a single-pixel-long single-pixel-wide line?
surf.Flush ();
int shiftedX = (int)point.X;
int shiftedY = (int)point.Y;
ColorBgra source = surf.GetColorBgraUnchecked (shiftedX, shiftedY);
source = UserBlendOps.NormalBlendOp.ApplyStatic (source, tool_color.ToColorBgra ());
surf.SetColorBgra (source, shiftedX, shiftedY);
surf.MarkDirty ();
} else {
using (Context g = new Context (surf)) {
g.AppendPath (doc.Selection.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Clip ();
g.Antialias = Antialias.None;
// Adding 0.5 forces cairo into the correct square:
// See https://bugs.launchpad.net/bugs/672232
g.MoveTo (last_point.X + 0.5, last_point.Y + 0.5);
g.LineTo (x + 0.5, y + 0.5);
g.Color = tool_color;
g.LineWidth = 1;
g.LineCap = LineCap.Square;
g.Stroke ();
}
}
Gdk.Rectangle r = GetRectangleFromPoints (last_point, new Point (x, y));
doc.Workspace.Invalidate (r);
last_point = new Point (x, y);
}
