/// <summary>
/// Draws a bitmap image.
/// </summary>
/// <param name="source">The bitmap image.</param>
/// <param name="opacity">The opacity to draw with.</param>
/// <param name="sourceRect">The rect in the image to draw.</param>
/// <param name="destRect">The rect in the output to draw to.</param>
public void DrawImage(IBitmapImpl bitmap, double opacity, Rect sourceRect, Rect destRect)
{
var pixbuf = bitmap as Gdk.Pixbuf;
var rtb = bitmap as RenderTargetBitmapImpl;
var size = new Size(pixbuf?.Width ?? rtb.PixelWidth, pixbuf?.Height ?? rtb.PixelHeight);
var scale = new Vector(destRect.Width / sourceRect.Width, destRect.Height / sourceRect.Height);
_context.Save();
_context.Scale(scale.X, scale.Y);
destRect /= scale;
_context.PushGroup();
if (pixbuf != null)
{
Gdk.CairoHelper.SetSourcePixbuf(
_context,
pixbuf,
-sourceRect.X + destRect.X,
-sourceRect.Y + destRect.Y);
}
else
{
_context.SetSourceSurface(
rtb.Surface,
(int)(-sourceRect.X + destRect.X),
(int)(-sourceRect.Y + destRect.Y));
}
_context.Rectangle(destRect.ToCairo());
_context.Fill();
_context.PopGroupToSource();
_context.PaintWithAlpha(opacityOverride);
_context.Restore();
}
/// <summary>
/// Draws a bitmap image.
/// </summary>
/// <param name="source">The bitmap image.</param>
/// <param name="opacity">The opacity to draw with.</param>
/// <param name="sourceRect">The rect in the image to draw.</param>
/// <param name="destRect">The rect in the output to draw to.</param>
public void DrawImage(IBitmap bitmap, double opacity, Rect sourceRect, Rect destRect)
{
var impl = bitmap.PlatformImpl as BitmapImpl;
var size = new Size(impl.PixelWidth, impl.PixelHeight);
var scale = new Vector(destRect.Width / sourceRect.Width, destRect.Height / sourceRect.Height);
_context.Save();
_context.Scale(scale.X, scale.Y);
destRect /= scale;
if (opacityOverride < 1.0f)
{
_context.PushGroup();
Gdk.CairoHelper.SetSourcePixbuf(
_context,
impl.Surface,
-sourceRect.X + destRect.X,
-sourceRect.Y + destRect.Y);
_context.Rectangle(destRect.ToCairo());
_context.Fill();
_context.PopGroupToSource();
_context.PaintWithAlpha(opacityOverride);
}
else
{
_context.PushGroup();
Gdk.CairoHelper.SetSourcePixbuf(
_context,
impl.Surface,
-sourceRect.X + destRect.X,
-sourceRect.Y + destRect.Y);
_context.Rectangle(destRect.ToCairo());
_context.Fill();
_context.PopGroupToSource();
_context.PaintWithAlpha(opacityOverride);
}
_context.Restore();
}
public void Fill(object backend)
{
var gtkc = (CairoContextBackend)backend;
Cairo.Context ctx = gtkc.Context;
if (gtkc.GlobalAlpha == 1)
{
ctx.Fill();
}
else
{
ctx.PushGroup();
ctx.Fill();
ctx.PopGroupToSource();
ctx.PaintWithAlpha(gtkc.GlobalAlpha);
}
}
public virtual void Render(Cairo.Context cr)
{
double opacity = Opacity;
if (ContentAllocation.Width <= 0 || ContentAllocation.Height <= 0 || opacity <= 0)
{
return;
}
cr.Save();
if (opacity < 1.0)
{
cr.PushGroup();
}
MarginStyle margin_style = MarginStyle;
if (margin_style != null && margin_style != MarginStyle.None)
{
cr.Translate(Math.Round(Allocation.X), Math.Round(Allocation.Y));
cr.Save();
margin_style.Apply(this, cr);
cr.Restore();
cr.Translate(Math.Round(Margin.Left), Math.Round(Margin.Top));
}
else
{
cr.Translate(Math.Round(ContentAllocation.X), Math.Round(ContentAllocation.Y));
}
cr.Antialias = Cairo.Antialias.Default;
ClippedRender(cr);
if (opacity < 1.0)
{
cr.PopGroupToSource();
cr.PaintWithAlpha(Opacity);
}
cr.Restore();
}