Smooth paint brush

[ryan-de-boer]

For me the paint brush always has a hard edge is there any way to make it smooth? I found BrushCollectionAddin_1.0,0.mpack but it needs Pinta 1.7 and I couldn't install 1.7 due to urls missing. If I got the brush collection working, would that give me a brush with a smooth edge? I might try building 1.7 to see if it works.
It has smooth replace in this video: https://www.youtube.com/watch?v=tVDOnpba4Ww
Perhaps that might work well, or maybe modified a bit.
In paint dot net it has a hardness setting where you set it to lower % values to get smoother results. Perhaps do the same here? Oh it looks like clone stamp tool doesn't have smooth support either, in paint dot net it uses the hardness setting again.
I really need smooth edges working before tackling the layer mask, I want to be able to paint black smooth.

[ryan-de-boer]

I've managed to add a smooth brush to master. I took the code from BrushCollectionAddin, ported it to latest style and fixed a fade to black instead of fade to transparent on smooth edges.

Here are the changes I made:

CoreToolsExtension.cs:
PintaCore.PaintBrushes.AddPaintBrush (new Brushes.CircleBrush ());
Add:
PintaCore.PaintBrushes.AddPaintBrush (new Brushes.SmoothBrush ());

And this is the SmoothBrush.cs, put it in with CircleBrush.cs:
SmoothBrush.cs.txt

I may do a proper pull request later.

Here is an example of me using the smooth brush with black and then white on top:

Smooth stamp tool is still todo.
I might just close this idea, and maybe raise another one when I want to do the stamp tool.

[ryan-de-boer]

For smoother edges on clone stamp tool:
Replace OnMouseMove in CloneStampTool.cs with:
CloneStampTool.cs_2.txt
I'm not sure that its perfect but it is better.

To make clone work on mouse down you can add to end of MouseDown:
`// But we also want to stamp this location.

last_point = e.Point;
OnMouseMove(document, e);`

Whole mouse down:
` protected override void OnMouseDown (Document document, ToolMouseEventArgs e)
{
// We only do stuff with the left mouse button
if (e.MouseButton != MouseButton.Left)
return;

	// Ctrl click is set origin, regular click is begin drawing
	if (!e.IsControlPressed) {
		if (!origin.HasValue)
			return;

		painting = true;

		if (!offset.HasValue)
			offset = new (e.Point.X - origin.Value.X, e.Point.Y - origin.Value.Y);

		document.Layers.ToolLayer.Clear ();
		document.Layers.ToolLayer.Hidden = false;

		surface_modified = false;
		undo_surface = document.Layers.CurrentUserLayer.Surface.Clone ();

		// But we also want to stamp this location.
		last_point = e.Point;
		OnMouseMove(document, e);
	} else {
		origin = e.Point;
		offset = null;
	}
}`

[ryan-de-boer]

TODO:
It should be easy to be able to tweak the smoothness (hardness) with a slider.
See this issue: #751

[ryan-de-boer]

Now we have a proper pull request:
#1988

And a fork with the changes if you want to compile:
https://github.com/ryan-de-boer
See rdeboer_smooth branch