C# Cairo.Context.AppendPath方法代码示例

 internal bool FillContains(Point point)
 {
     using (var context = new Cairo.Context(new Cairo.ImageSurface(Cairo.Format.Argb32, 0, 0)))
     {
         context.AppendPath(Path);
         return context.InFill(point.X, point.Y); 
     }
 }

		public StreamGeometryContextImpl(Cairo.Path path = null)
        {

			_surf = new Cairo.ImageSurface (Cairo.Format.Argb32, 0, 0);
			_context = new Cairo.Context (_surf);
			this.Path = path;

			if (this.Path != null) 
			{
				_context.AppendPath(this.Path);
			}
        }

		// Called from asynchronously from Renderer.OnCompletion ()
		void HandleApply ()
		{
			Debug.WriteLine ("LivePreviewManager.HandleApply()");

			var item = new SimpleHistoryItem (effect.Icon, effect.Name);
			item.TakeSnapshotOfLayer (PintaCore.Layers.CurrentLayerIndex);			
			
			using (var ctx = new Cairo.Context (layer.Surface)) {
				
				ctx.Save ();
				ctx.AppendPath (PintaCore.Workspace.ActiveDocument.Selection.SelectionPath);
				ctx.FillRule = Cairo.FillRule.EvenOdd;
				ctx.Clip ();				
			
				ctx.Operator = Cairo.Operator.Source;
				
				ctx.SetSourceSurface (live_preview_surface, (int)layer.Offset.X, (int)layer.Offset.Y);
				ctx.Paint ();
				ctx.Restore ();
			}
			
			PintaCore.History.PushNewItem (item);
			
			FireLivePreviewEndedEvent(RenderStatus.Completed, null);
			
			live_preview_enabled = false;
			
			PintaCore.Workspace.Invalidate (); //TODO keep track of dirty bounds.
			CleanUp ();
		}

        /// <summary>
        /// Draws the text.
        /// </summary>
        /// <param name="showCursor">Whether or not to show the mouse cursor in the drawing.</param>
        /// <param name="useTextLayer">Whether or not to use the TextLayer (as opposed to the Userlayer).</param>
        private void RedrawText(bool showCursor, bool useTextLayer)
        {
            Rectangle r = CurrentTextEngine.GetLayoutBounds();
            r.Inflate(10 + OutlineWidth, 10 + OutlineWidth);
            CurrentTextBounds = r;

            Rectangle cursorBounds = Rectangle.Zero;

            Cairo.ImageSurface surf;

            if (!useTextLayer)
            {
                //Draw text on the current UserLayer's surface as finalized text.
                surf = PintaCore.Workspace.ActiveDocument.CurrentUserLayer.Surface;
            }
            else
            {
                //Draw text on the current UserLayer's TextLayer's surface as re-editable text.
                surf = PintaCore.Workspace.ActiveDocument.CurrentUserLayer.TextLayer.Surface;

                ClearTextLayer();
            }

            using (var g = new Cairo.Context (surf)) {
                g.Save ();

                // Show selection if on text layer
                if (useTextLayer) {
                    // Selected Text
                    Cairo.Color c = new Cairo.Color (0.7, 0.8, 0.9, 0.5);
                    foreach (Rectangle rect in CurrentTextEngine.SelectionRectangles)
                        g.FillRectangle (rect.ToCairoRectangle (), c);
                }
                g.AppendPath (PintaCore.Workspace.ActiveDocument.Selection.SelectionPath);
                g.FillRule = Cairo.FillRule.EvenOdd;
                g.Clip ();

                g.MoveTo (new Cairo.PointD (CurrentTextEngine.Origin.X, CurrentTextEngine.Origin.Y));

                g.Color = PintaCore.Palette.PrimaryColor;

                //Fill in background
                if (BackgroundFill) {
                    using (var g2 = new Cairo.Context (surf)) {
                        g2.FillRectangle(CurrentTextEngine.GetLayoutBounds().ToCairoRectangle(), PintaCore.Palette.SecondaryColor);
                    }
                }

                // Draw the text
                if (FillText)
                    Pango.CairoHelper.ShowLayout (g, CurrentTextEngine.Layout);

                if (FillText && StrokeText) {
                    g.Color = PintaCore.Palette.SecondaryColor;
                    g.LineWidth = OutlineWidth;

                    Pango.CairoHelper.LayoutPath (g, CurrentTextEngine.Layout);
                    g.Stroke ();
                } else if (StrokeText) {
                    g.Color = PintaCore.Palette.PrimaryColor;
                    g.LineWidth = OutlineWidth;

                    Pango.CairoHelper.LayoutPath (g, CurrentTextEngine.Layout);
                    g.Stroke ();
                }

                if (showCursor) {
                    var loc = CurrentTextEngine.GetCursorLocation ();

                    g.Antialias = Cairo.Antialias.None;
                    g.DrawLine (new Cairo.PointD (loc.X, loc.Y), new Cairo.PointD (loc.X, loc.Y + loc.Height), new Cairo.Color (0, 0, 0, 1), 1);

                    cursorBounds = Rectangle.Inflate (loc, 2, 10);
                }

                g.Restore ();

                if (useTextLayer && (is_editing || ctrlKey) && !CurrentTextEngine.IsEmpty())
                {
                    //Draw the text edit rectangle.

                    g.Save();

                    g.Translate(.5, .5);

                    using (Cairo.Path p = g.CreateRectanglePath(new Cairo.Rectangle(CurrentTextBounds.Left, CurrentTextBounds.Top,
                        CurrentTextBounds.Width, CurrentTextBounds.Height - FontSize)))
                    {
                        g.AppendPath(p);
                    }

                    g.LineWidth = 1;

                    g.Color = new Cairo.Color(1, 1, 1);
                    g.StrokePreserve();
//.........这里部分代码省略.........

        protected override void OnMouseMove(object o, Gtk.MotionNotifyEventArgs args, Cairo.PointD point)
        {
            if (!painting || offset.IsNotSet ())
                return;

            int x = (int)point.X;
            int y = (int)point.Y;

            if (last_point.IsNotSet ()) {
                last_point = new Point (x, y);
                return;
            }

            using (Cairo.Context g = new Cairo.Context (PintaCore.Layers.ToolLayer.Surface)) {
                g.AppendPath (PintaCore.Layers.SelectionPath);
                g.FillRule = Cairo.FillRule.EvenOdd;
                g.Clip ();

                g.Antialias = Cairo.Antialias.Subpixel;

                g.MoveTo (last_point.X, last_point.Y);
                g.LineTo (x, y);

                g.SetSource (PintaCore.Workspace.ActiveDocument.CurrentLayer.Surface, offset.X, offset.Y);
                g.LineWidth = BrushWidth;
                g.LineCap = Cairo.LineCap.Round;

                g.Stroke ();
            }

            var dirty_rect = GetRectangleFromPoints (last_point, new Point (x, y));

            last_point = new Point (x, y);
            surface_modified = true;
            PintaCore.Workspace.Invalidate (dirty_rect);
        }

        private void RedrawText(bool showCursor, bool useToolLayer)
        {
            Cairo.ImageSurface surf;
            var invalidate_cursor = old_cursor_bounds;

            if (!useToolLayer)
                surf = PintaCore.Workspace.ActiveDocument.CurrentLayer.Surface;
            else {
                surf = PintaCore.Workspace.ActiveDocument.ToolLayer.Surface;
                surf.Clear ();
            }

            using (var g = new Cairo.Context (surf)) {
                g.Save ();

                // Show selection if on tool layer
                if (useToolLayer) {
                    // Selected Text
                    Cairo.Color c = new Cairo.Color (0.7, 0.8, 0.9, 0.5);
                    foreach (Rectangle rect in engine.SelectionRectangles)
                        g.FillRectangle (rect.ToCairoRectangle (), c);
                }
                g.AppendPath (PintaCore.Workspace.ActiveDocument.SelectionPath);
                g.FillRule = Cairo.FillRule.EvenOdd;
                g.Clip ();
                g.MoveTo (new Cairo.PointD (engine.Origin.X, engine.Origin.Y));
                g.Color = PintaCore.Palette.PrimaryColor;

                if (BackgroundFill)	{

                    using (var g2 = new Cairo.Context (surf)) {

                        g2.FillRectangle (engine.GetLayoutBounds ().ToCairoRectangle (),PintaCore.Palette.SecondaryColor);

                    }
            }

                if (FillText) {
                    Pango.CairoHelper.ShowLayout (g, engine.Layout);
            }

                if (FillText && StrokeText) {
                    g.Color = PintaCore.Palette.SecondaryColor;
                    g.LineWidth = OutlineWidth;

                    Pango.CairoHelper.LayoutPath (g, engine.Layout);
                    g.Stroke ();
                } else if (StrokeText) {
                    g.Color = PintaCore.Palette.PrimaryColor;
                    g.LineWidth = OutlineWidth;

                    Pango.CairoHelper.LayoutPath (g, engine.Layout);
                    g.Stroke ();
                }

                if (showCursor) {
                    var loc = engine.GetCursorLocation ();

                    g.Antialias = Cairo.Antialias.None;
                    g.DrawLine (new Cairo.PointD (loc.X, loc.Y), new Cairo.PointD (loc.X, loc.Y + loc.Height), new Cairo.Color (0, 0, 0, 1), 1);

                    loc.Inflate (2, 10);
                    old_cursor_bounds = loc;
                }

                g.Restore ();
            }

            Rectangle r = engine.GetLayoutBounds ();
            r.Inflate (10 + OutlineWidth, 10 + OutlineWidth);

            PintaCore.Workspace.Invalidate (old_bounds);
            PintaCore.Workspace.Invalidate (invalidate_cursor);
            PintaCore.Workspace.Invalidate (r);

            old_bounds = r;
        }