public static void CachedDraw(this Cairo.Context self, ref SurfaceWrapper surface, Gdk.Rectangle region,
object parameters = null, float opacity = 1.0f, Action <Cairo.Context, float> draw = null, double?forceScale = null)
{
double displayScale = forceScale.HasValue ? forceScale.Value : QuartzSurface.GetRetinaScale(self);
int targetWidth = (int)(region.Width * displayScale);
int targetHeight = (int)(region.Height * displayScale);
bool redraw = false;
if (surface == null || surface.Width != targetWidth || surface.Height != targetHeight)
{
if (surface != null)
{
surface.Dispose();
}
surface = new SurfaceWrapper(self, targetWidth, targetHeight);
redraw = true;
}
else if ((surface.Data == null && parameters != null) || (surface.Data != null && !surface.Data.Equals(parameters)))
{
redraw = true;
}
if (redraw)
{
surface.Data = parameters;
using (var context = new Cairo.Context(surface.Surface)) {
context.Operator = Operator.Clear;
context.Paint();
context.Operator = Operator.Over;
context.Save();
context.Scale(displayScale, displayScale);
draw(context, 1.0f);
context.Restore();
}
}
self.Save();
self.Translate(region.X, region.Y);
self.Scale(1 / displayScale, 1 / displayScale);
self.SetSourceSurface(surface.Surface, 0, 0);
self.PaintWithAlpha(opacity);
self.Restore();
}
public static void CachedDraw(this Cairo.Context self, ref SurfaceWrapper surface, Gdk.Rectangle region,
object parameters = null, float opacity = 1.0f, Action<Cairo.Context, float> draw = null, double? forceScale = null)
{
double displayScale = forceScale.HasValue ? forceScale.Value : QuartzSurface.GetRetinaScale (self);
int targetWidth = (int) (region.Width * displayScale);
int targetHeight = (int) (region.Height * displayScale);
bool redraw = false;
if (surface == null || surface.Width != targetWidth || surface.Height != targetHeight) {
if (surface != null)
surface.Dispose ();
surface = new SurfaceWrapper (self, targetWidth, targetHeight);
redraw = true;
} else if ((surface.Data == null && parameters != null) || (surface.Data != null && !surface.Data.Equals (parameters))) {
redraw = true;
}
if (redraw) {
surface.Data = parameters;
using (var context = new Cairo.Context (surface.Surface)) {
context.Operator = Operator.Clear;
context.Paint();
context.Operator = Operator.Over;
context.Save ();
context.Scale (displayScale, displayScale);
draw(context, 1.0f);
context.Restore ();
}
}
self.Save ();
self.Translate (region.X, region.Y);
self.Scale (1 / displayScale, 1 / displayScale);
self.SetSourceSurface (surface.Surface, 0, 0);
self.PaintWithAlpha (opacity);
self.Restore ();
}
public static void CachedDraw(this Cairo.Context self, ref SurfaceWrapper surface, Gdk.Point position, Gdk.Size size,
object parameters = null, float opacity = 1.0f, Action<Cairo.Context, float> draw = null, double? forceScale = null)
{
self.CachedDraw (ref surface, new Gdk.Rectangle (position, size), parameters, opacity, draw, forceScale);
}
void RenderIcon(Cairo.Context context, SurfaceWrapper surface, double opacity)
{
context.SetSourceSurface(surface.Surface,
Allocation.X + (Allocation.Width - surface.Width) / 2,
Allocation.Y + (Allocation.Height - surface.Height) / 2);
context.PaintWithAlpha(opacity);
}
protected override void OnRealized()
{
base.OnRealized();
using (Cairo.Context context = Gdk.CairoHelper.Create(GdkWindow))
{
primarySurface = new SurfaceWrapper(context, primary);
secondarySurface = new SurfaceWrapper(context, secondary);
context.Dispose();
}
primary.Dispose();
primary = null;
secondary.Dispose();
secondary = null;
}
public static void CachedDraw(this Cairo.Context self, ref SurfaceWrapper surface, Gdk.Point position, Gdk.Size size,
object parameters = null, float opacity = 1.0f, Action <Cairo.Context, float> draw = null, double?forceScale = null)
{
self.CachedDraw(ref surface, new Gdk.Rectangle(position, size), parameters, opacity, draw, forceScale);
}
