public SurfaceWrapper(Cairo.Context similar, Gdk.Pixbuf source)
{
// IMPORTANT: do not store parameter "similar" here inside! it will be disposed after this call!
Cairo.Surface surface;
// There is a bug in Cairo for OSX right now that prevents creating additional accellerated surfaces.
if (Platform.IsMac)
{
surface = new QuartzSurface(Format.ARGB32, source.Width, source.Height);
}
else if (Platform.IsWindows)
{
using (var t = similar.GetTarget()) {
surface = t.CreateSimilar(Content.ColorAlpha, source.Width, source.Height);
}
}
else
{
surface = new ImageSurface(Format.ARGB32, source.Width, source.Height);
}
using (Context context = new Context(surface)) {
Gdk.CairoHelper.SetSourcePixbuf(context, source, 0, 0);
context.Paint();
}
Surface = surface;
Width = source.Width;
Height = source.Height;
}
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 SurfaceWrapper(Cairo.Context similar, int width, int height)
{
if (Platform.IsMac)
{
Surface = new QuartzSurface(Cairo.Format.ARGB32, width, height);
}
else if (Platform.IsWindows)
{
using (var target = similar.GetTarget()) {
Surface = target.CreateSimilar(Cairo.Content.ColorAlpha, width, height);
}
}
else
{
Surface = new ImageSurface(Cairo.Format.ARGB32, width, height);
}
Width = width;
Height = height;
}
public SurfaceWrapper(Cairo.Context similar, Gdk.Pixbuf source)
{
// IMPORTANT: do not store parameter "similar" here inside! it will be disposed after this call!
Cairo.Surface surface;
// There is a bug in Cairo for OSX right now that prevents creating additional accellerated surfaces.
if (Platform.IsMac) {
surface = new QuartzSurface (Format.ARGB32, source.Width, source.Height);
} else if (Platform.IsWindows) {
using (var t = similar.GetTarget ()) {
surface = t.CreateSimilar (Content.ColorAlpha, source.Width, source.Height);
}
} else {
surface = new ImageSurface (Format.ARGB32, source.Width, source.Height);
}
using (Context context = new Context (surface)) {
Gdk.CairoHelper.SetSourcePixbuf (context, source, 0, 0);
context.Paint ();
}
Surface = surface;
Width = source.Width;
Height = source.Height;
}
public SurfaceWrapper(Cairo.Context similar, int width, int height)
{
if (Platform.IsMac) {
Surface = new QuartzSurface (Cairo.Format.ARGB32, width, height);
} else if (Platform.IsWindows) {
using (var target = similar.GetTarget ()) {
Surface = target.CreateSimilar (Cairo.Content.ColorAlpha, width, height);
}
} else {
Surface = new ImageSurface (Cairo.Format.ARGB32, width, height);
}
Width = width;
Height = height;
}
