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@ -15,7 +15,7 @@ namespace Avalonia.Cairo.Media |
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using Cairo = global::Cairo; |
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/// <summary>
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/// Draws using Direct2D1.
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/// Draws using Cairo.
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/// </summary>
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public class DrawingContext : IDrawingContextImpl, IDisposable |
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{ |
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@ -24,6 +24,8 @@ namespace Avalonia.Cairo.Media |
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/// </summary>
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private readonly Cairo.Context _context; |
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private readonly Stack<BrushImpl> _maskStack = new Stack<BrushImpl>(); |
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/// <summary>
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/// Initializes a new instance of the <see cref="DrawingContext"/> class.
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/// </summary>
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@ -83,31 +85,31 @@ namespace Avalonia.Cairo.Media |
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_context.Scale(scale.X, scale.Y); |
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destRect /= scale; |
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if (opacityOverride < 1.0f) { |
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_context.PushGroup (); |
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Gdk.CairoHelper.SetSourcePixbuf ( |
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_context, |
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impl.Surface, |
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-sourceRect.X + destRect.X, |
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-sourceRect.Y + destRect.Y); |
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_context.Rectangle (destRect.ToCairo ()); |
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_context.Fill (); |
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_context.PopGroupToSource (); |
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_context.PaintWithAlpha (opacityOverride); |
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} else { |
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_context.PushGroup (); |
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Gdk.CairoHelper.SetSourcePixbuf ( |
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_context, |
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impl.Surface, |
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-sourceRect.X + destRect.X, |
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-sourceRect.Y + destRect.Y); |
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_context.Rectangle (destRect.ToCairo ()); |
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_context.Fill (); |
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_context.PopGroupToSource (); |
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_context.PaintWithAlpha (opacityOverride); |
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} |
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if (opacityOverride < 1.0f) { |
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_context.PushGroup (); |
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Gdk.CairoHelper.SetSourcePixbuf ( |
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_context, |
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impl.Surface, |
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-sourceRect.X + destRect.X, |
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-sourceRect.Y + destRect.Y); |
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_context.Rectangle (destRect.ToCairo ()); |
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_context.Fill (); |
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_context.PopGroupToSource (); |
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_context.PaintWithAlpha (opacityOverride); |
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} else { |
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_context.PushGroup (); |
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Gdk.CairoHelper.SetSourcePixbuf ( |
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_context, |
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impl.Surface, |
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-sourceRect.X + destRect.X, |
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-sourceRect.Y + destRect.Y); |
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_context.Rectangle (destRect.ToCairo ()); |
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_context.Fill (); |
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_context.PopGroupToSource (); |
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_context.PaintWithAlpha (opacityOverride); |
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} |
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_context.Restore(); |
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} |
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@ -121,12 +123,12 @@ namespace Avalonia.Cairo.Media |
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{ |
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var size = new Rect(p1, p2).Size; |
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using (var p = SetPen(pen, size)) |
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{ |
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_context.MoveTo(p1.ToCairo()); |
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_context.LineTo(p2.ToCairo()); |
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_context.Stroke(); |
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} |
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using (var p = SetPen(pen, size)) |
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{ |
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_context.MoveTo(p1.ToCairo()); |
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_context.LineTo(p2.ToCairo()); |
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_context.Stroke(); |
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} |
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} |
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/// <summary>
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@ -177,11 +179,11 @@ namespace Avalonia.Cairo.Media |
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/// <param name="rect">The rectangle bounds.</param>
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public void DrawRectangle(Pen pen, Rect rect, float cornerRadius) |
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{ |
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using (var p = SetPen(pen, rect.Size)) |
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{ |
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_context.Rectangle(rect.ToCairo ()); |
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_context.Stroke(); |
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} |
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using (var p = SetPen(pen, rect.Size)) |
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{ |
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_context.Rectangle(rect.ToCairo ()); |
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_context.Stroke(); |
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} |
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} |
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/// <summary>
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@ -195,10 +197,10 @@ namespace Avalonia.Cairo.Media |
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var layout = ((FormattedTextImpl)text.PlatformImpl).Layout; |
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_context.MoveTo(origin.X, origin.Y); |
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using (var b = SetBrush(foreground, new Size(0, 0))) |
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{ |
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Pango.CairoHelper.ShowLayout(_context, layout); |
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} |
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using (var b = SetBrush(foreground, new Size(0, 0))) |
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{ |
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Pango.CairoHelper.ShowLayout(_context, layout); |
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} |
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} |
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/// <summary>
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@ -208,11 +210,11 @@ namespace Avalonia.Cairo.Media |
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/// <param name="rect">The rectangle bounds.</param>
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public void FillRectangle(IBrush brush, Rect rect, float cornerRadius) |
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{ |
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using (var b = SetBrush(brush, rect.Size)) |
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{ |
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_context.Rectangle(rect.ToCairo ()); |
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_context.Fill(); |
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} |
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using (var b = SetBrush(brush, rect.Size)) |
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{ |
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_context.Rectangle(rect.ToCairo ()); |
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_context.Fill(); |
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} |
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} |
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/// <summary>
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@ -269,50 +271,57 @@ namespace Avalonia.Cairo.Media |
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}); |
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} |
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private double opacityOverride = 1.0f; |
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private double opacityOverride = 1.0f; |
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private IDisposable SetBrush(IBrush brush, Size destinationSize) |
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{ |
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_context.Save (); |
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_context.Save(); |
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BrushImpl impl = CreateBrushImpl(brush, destinationSize); |
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_context.SetSource(impl.PlatformBrush); |
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return Disposable.Create(() => |
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{ |
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impl.Dispose(); |
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_context.Restore(); |
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}); |
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} |
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private BrushImpl CreateBrushImpl(IBrush brush, Size destinationSize) |
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{ |
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var solid = brush as SolidColorBrush; |
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var linearGradientBrush = brush as LinearGradientBrush; |
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var radialGradientBrush = brush as RadialGradientBrush; |
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var imageBrush = brush as ImageBrush; |
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var visualBrush = brush as VisualBrush; |
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BrushImpl impl = null; |
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if (solid != null) |
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{ |
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impl = new SolidColorBrushImpl(solid, opacityOverride); |
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} |
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else if (linearGradientBrush != null) |
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{ |
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impl = new LinearGradientBrushImpl(linearGradientBrush, destinationSize); |
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} |
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BrushImpl impl = null; |
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if (solid != null) |
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{ |
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impl = new SolidColorBrushImpl(solid, opacityOverride); |
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} |
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else if (linearGradientBrush != null) |
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{ |
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impl = new LinearGradientBrushImpl(linearGradientBrush, destinationSize); |
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} |
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else if (radialGradientBrush != null) |
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{ |
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impl = new RadialGradientBrushImpl(radialGradientBrush, destinationSize); |
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} |
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else if (imageBrush != null) |
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{ |
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impl = new ImageBrushImpl(imageBrush, destinationSize); |
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} |
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else if (visualBrush != null) |
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{ |
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impl = new VisualBrushImpl(visualBrush, destinationSize); |
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} |
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else |
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{ |
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impl = new SolidColorBrushImpl(null, opacityOverride); |
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} |
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_context.SetSource(impl.PlatformBrush); |
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return Disposable.Create(() => |
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{ |
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impl.Dispose(); |
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_context.Restore(); |
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}); |
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else if (imageBrush != null) |
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{ |
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impl = new ImageBrushImpl(imageBrush, destinationSize); |
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} |
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else if (visualBrush != null) |
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{ |
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impl = new VisualBrushImpl(visualBrush, destinationSize); |
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} |
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else |
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{ |
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impl = new SolidColorBrushImpl(null, opacityOverride); |
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} |
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return impl; |
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} |
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private IDisposable SetPen(Pen pen, Size destinationSize) |
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@ -335,10 +344,35 @@ namespace Avalonia.Cairo.Media |
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_context.LineJoin = Cairo.LineJoin.Miter; |
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_context.LineCap = Cairo.LineCap.Butt; |
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if (pen.Brush == null) |
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return Disposable.Empty; |
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return SetBrush(pen.Brush, destinationSize); |
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if (pen.Brush == null) |
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return Disposable.Empty; |
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return SetBrush(pen.Brush, destinationSize); |
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} |
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public void PushGeometryClip(Geometry clip) |
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{ |
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_context.Save(); |
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_context.AppendPath(((StreamGeometryImpl)clip.PlatformImpl).Path); |
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_context.Clip(); |
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} |
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public void PopGeometryClip() |
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{ |
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_context.Restore(); |
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} |
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public void PushOpacityMask(IBrush mask, Rect bounds) |
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{ |
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_context.PushGroup(); |
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var impl = CreateBrushImpl(mask, bounds.Size); |
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_maskStack.Push(impl); |
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} |
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public void PopOpacityMask() |
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{ |
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_context.PopGroupToSource(); |
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_context.Mask(_maskStack.Pop().PlatformBrush); |
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} |
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} |
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} |
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Steven Kirk
10 years ago