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);
}
protected unsafe override void OnFillRegionComputed(IBitVector2D stencil)
{
Document doc = PintaCore.Workspace.ActiveDocument;
ImageSurface surf = doc.ToolLayer.Surface;
using (var g = new Context(surf)) {
g.Operator = Operator.Source;
g.SetSource(doc.CurrentUserLayer.Surface);
g.Paint();
}
SimpleHistoryItem hist = new SimpleHistoryItem(Icon, Name);
hist.TakeSnapshotOfLayer(doc.CurrentUserLayer);
ColorBgra color = fill_color.ToColorBgra();
ColorBgra *dstPtr = (ColorBgra *)surf.DataPtr;
int width = surf.Width;
surf.Flush();
// Color in any pixel that the stencil says we need to fill
Parallel.For(0, stencil.Height, y =>
{
int stencil_width = stencil.Width;
for (int x = 0; x < stencil_width; ++x)
{
if (stencil.GetUnchecked(x, y))
{
surf.SetColorBgra(dstPtr, width, color, x, y);
}
}
});
surf.MarkDirty();
// Transfer the temp layer to the real one,
// respecting any selection area
using (var g = doc.CreateClippedContext()) {
g.Operator = Operator.Source;
g.SetSource(surf);
g.Paint();
}
doc.ToolLayer.Clear();
doc.History.PushNewItem(hist);
doc.Workspace.Invalidate();
}
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 = doc.CurrentUserLayer.Surface;
if (first_pixel && doc.Workspace.PointInCanvas(point))
{
// 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);
if (UseAlphaBlending)
{
source = UserBlendOps.NormalBlendOp.ApplyStatic(source, tool_color.ToColorBgra());
}
else
{
source = tool_color.ToColorBgra();
}
surf.SetColorBgra(source.ToPremultipliedAlpha(), 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.SetSourceColor(tool_color);
if (UseAlphaBlending)
{
g.SetBlendMode(BlendMode.Normal);
}
else
{
g.Operator = Operator.Source;
}
g.LineWidth = 1;
g.LineCap = LineCap.Square;
g.Stroke();
}
}
Gdk.Rectangle r = GetRectangleFromPoints(last_point, new Point(x, y));
doc.Workspace.Invalidate(doc.ClampToImageSize(r));
last_point = new Point(x, y);
}
