static void Draw(IntPtr context, CairoSurface surface, double factor)
{
Native.CairoSurfaceMarkDirty(surface);
Native.CairoScale(context, 1d / factor, 1d / factor);
Native.CairoSetSourceSurface(context, surface, 0, 0);
Native.CairoPaint(context);
}
public RenderOp(GtkWidget widget, CairoSurface _surface, double factor, int width, int height)
{
_widget = widget;
this._surface = _surface;
_factor = factor;
_width = width;
_height = height;
}
public void Dispose()
{
if (_context == IntPtr.Zero || _surface == null)
{
return;
}
Native.CairoSurfaceMarkDirty(_surface);
Native.CairoScale(_context, 1d / _factor, 1d / _factor);
Native.CairoSetSourceSurface(_context, _surface, 0, 0);
Native.CairoPaint(_context);
_context = IntPtr.Zero;
_surface.Dispose();
_surface = null;
}
public ImageSurfaceFramebuffer(IntPtr context, GtkWidget widget, int width, int height)
{
_context = context;
_widget = widget;
_factor = (int)(Native.GtkWidgetGetScaleFactor?.Invoke(_widget) ?? 1u);
width *= _factor;
height *= _factor;
_surface = Native.CairoImageSurfaceCreate(1, width, height);
Width = width;
Height = height;
Address = Native.CairoImageSurfaceGetData(_surface);
RowBytes = Native.CairoImageSurfaceGetStride(_surface);
Native.CairoSurfaceFlush(_surface);
}
public ImageSurfaceFramebuffer(WindowBaseImpl impl, int width, int height, int factor)
{
_impl = impl;
_widget = impl.GtkWidget;
_factor = factor;
width *= _factor;
height *= _factor;
_surface = Native.CairoImageSurfaceCreate(1, width, height);
Width = width;
Height = height;
Address = Native.CairoImageSurfaceGetData(_surface);
RowBytes = Native.CairoImageSurfaceGetStride(_surface);
Native.CairoSurfaceFlush(_surface);
}
/*
* static Stopwatch St =Stopwatch.StartNew();
* private static int _frames;
* private static int _fps;*/
static void DrawToWidget(GtkWidget widget, CairoSurface surface, int width, int height, double factor)
{
if (surface == null || widget.IsClosed)
{
return;
}
var window = Native.GtkWidgetGetWindow(widget);
if (window == IntPtr.Zero)
{
return;
}
var rc = new GdkRectangle {
Width = width, Height = height
};
Native.GdkWindowBeginPaintRect(window, ref rc);
var context = Native.GdkCairoCreate(window);
Draw(context, surface, factor);
/*
* _frames++;
* var el = St.Elapsed;
* if (el.TotalSeconds > 1)
* {
* _fps = (int) (_frames / el.TotalSeconds);
* _frames = 0;
* St = Stopwatch.StartNew();
* }
*
* Native.CairoSetSourceRgba(context, 1, 0, 0, 1);
* Native.CairoMoveTo(context, 20, 20);
* Native.CairoSetFontSize(context, 30);
* using (var txt = new Utf8Buffer("FPS: " + _fps))
* Native.CairoShowText(context, txt);
*/
Native.CairoDestroy(context);
Native.GdkWindowEndPaint(window);
}
public void Dispose()
{
lock (_lock)
{
if (Dispatcher.UIThread.CheckAccess())
{
if (_impl.CurrentCairoContext != IntPtr.Zero)
{
Draw(_impl.CurrentCairoContext, _surface, _factor);
}
else
{
DrawToWidget(_widget, _surface, Width, Height, _factor);
}
_surface.Dispose();
}
else
{
_impl.SetNextRenderOperation(new RenderOp(_widget, _surface, _factor, Width, Height));
}
_surface = null;
}
}
public void Dispose()
{
_surface?.Dispose();
_surface = null;
}
