protected override void OnSizeChanged(EventArgs e)
{
VirtualDevice device = Device;
if (device != null)
{
float xScale = 1;
float yScale = 1;
float ppd = OffscreenGraphics.PixelsPerDip;
CefRect viewportRect = device.ViewportRect;
viewportRect.Scale(OffscreenGraphics.PixelsPerDip);
Rectangle clientRect = this.ClientRectangle;
if (viewportRect.Height > clientRect.Height)
{
yScale = Math.Max(clientRect.Height - 6.0f, 1.0f) / viewportRect.Height;
}
if (viewportRect.Width > clientRect.Width)
{
xScale = Math.Max(clientRect.Width - 6.0f, 1.0f) / viewportRect.Width;
}
device.Scale = Math.Min(xScale, yScale);
CefRect bounds = device.GetBounds(ppd);
device.X = (int)(((clientRect.Width - bounds.Width) >> 1) / ppd);
device.Y = (int)(((clientRect.Height - bounds.Height) >> 1) / ppd);
CefInvalidate();
}
base.OnSizeChanged(e);
}
protected CefRect GetViewportRect()
{
CefRect viewportRect;
VirtualDevice device = Device;
if (device == null)
{
viewportRect = new CefRect(0, 0, this.Width, this.Height);
viewportRect.Scale(OffscreenGraphics.PixelsPerDip);
return(viewportRect);
}
else
{
return(device.GetBounds(OffscreenGraphics.PixelsPerDip));
}
}
public unsafe CefRect Draw(CefPaintEventArgs e)
{
float ppd = OffscreenGraphics.PixelsPerDip;
VirtualDevice device = this.Device;
CefRect[] dirtyRects = e.DirtyRects;
if (dirtyRects.Length == 0)
{
return(new CefRect());
}
CefRect r = dirtyRects[0];
CefRect invalidRect = new CefRect(r.X, r.Y, r.Width, r.Height);
for (int i = 1; i < dirtyRects.Length; i++)
{
invalidRect.Union(dirtyRects[i]);
}
if (device != null)
{
invalidRect.Scale(device.Scale * ppd / device.DevicePixelRatio);
}
if (e.PaintElementType == CefPaintElementType.Popup)
{
invalidRect.Offset(_popupBounds.X, _popupBounds.Y);
}
if (invalidRect.IsNullSize)
{
return(new CefRect());
}
lock (_syncRoot)
{
int width = e.Width;
int height = e.Height;
if (device != null)
{
if (e.PaintElementType == CefPaintElementType.View)
{
width = (int)(_bounds.Width * device.Scale * ppd);
height = (int)(_bounds.Height * device.Scale * ppd);
}
else if (e.PaintElementType == CefPaintElementType.Popup)
{
width = (int)(e.Width / device.DevicePixelRatio * device.Scale * ppd);
height = (int)(e.Height / device.DevicePixelRatio * device.Scale * ppd);
}
}
PixelBuffer pixelBuffer;
if (e.PaintElementType == CefPaintElementType.View)
{
if (ViewPixels == null || ViewPixels.Width != width || ViewPixels.Height != height)
{
if (ViewPixels != null)
{
ViewPixels.Dispose();
}
ViewPixels = new PixelBuffer(width, height);
}
pixelBuffer = ViewPixels;
}
else if (e.PaintElementType == CefPaintElementType.Popup)
{
if (PopupPixels == null || PopupPixels.Width != width || PopupPixels.Height != height)
{
if (PopupPixels != null)
{
PopupPixels.Dispose();
}
PopupPixels = new PixelBuffer(width, height);
}
pixelBuffer = PopupPixels;
}
else
{
return(new CefRect());
}
if (e.Width == pixelBuffer.Width && e.Height == pixelBuffer.Height)
{
long bufferSize = pixelBuffer.Source.ByteCount;
Buffer.MemoryCopy(e.Buffer.ToPointer(), pixelBuffer.Source.GetPixels().ToPointer(), bufferSize, bufferSize);
}
else
{
using (var canvas = new SKCanvas(pixelBuffer.Source))
using (var paint = new SKPaint())
{
canvas.Clear();
paint.FilterQuality = SKFilterQuality.Medium;
using (var source = new SKBitmap())
{
source.InstallPixels(new SKImageInfo(e.Width, e.Height, SKColorType.Bgra8888, SKAlphaType.Opaque), e.Buffer);
canvas.DrawBitmap(source, new SKRect(0, 0, pixelBuffer.Width, pixelBuffer.Height), paint);
}
canvas.Flush();
}
}
}
invalidRect.Inflate(2, 2);
return(invalidRect);
}
public CefRect Draw(CefPaintEventArgs e)
{
float ppd = OffscreenGraphics.PixelsPerDip;
VirtualDevice device = this.Device;
CefRect[] dirtyRects = e.DirtyRects;
if (dirtyRects.Length == 0)
{
return(new CefRect());
}
CefRect r = dirtyRects[0];
CefRect invalidRect = new CefRect(r.X, r.Y, r.Width, r.Height);
for (int i = 1; i < dirtyRects.Length; i++)
{
invalidRect.Union(dirtyRects[i]);
}
if (device != null)
{
invalidRect.Scale(device.Scale * ppd / device.DevicePixelRatio);
}
if (e.PaintElementType == CefPaintElementType.Popup)
{
invalidRect.Offset(_popupBounds.X, _popupBounds.Y);
}
if (invalidRect.IsNullSize)
{
return(new CefRect());
}
lock (_syncRoot)
{
int width = e.Width;
int height = e.Height;
if (device != null)
{
if (e.PaintElementType == CefPaintElementType.View)
{
width = (int)(_bounds.Width * device.Scale * ppd);
height = (int)(_bounds.Height * device.Scale * ppd);
}
else if (e.PaintElementType == CefPaintElementType.Popup)
{
width = (int)(e.Width / device.DevicePixelRatio * device.Scale * ppd);
height = (int)(e.Height / device.DevicePixelRatio * device.Scale * ppd);
}
}
PixelBuffer pixelBuffer;
if (e.PaintElementType == CefPaintElementType.View)
{
if (ViewPixels == null || ViewPixels.Width != width || ViewPixels.Height != height)
{
if (ViewPixels != null)
{
ViewPixels.Dispose();
}
ViewPixels = new PixelBuffer(width, height);
}
pixelBuffer = ViewPixels;
}
else if (e.PaintElementType == CefPaintElementType.Popup)
{
if (PopupPixels == null || PopupPixels.Width != width || PopupPixels.Height != height)
{
if (PopupPixels != null)
{
PopupPixels.Dispose();
}
PopupPixels = new PixelBuffer(width, height);
}
pixelBuffer = PopupPixels;
}
else
{
return(new CefRect());
}
using (Graphics g = Graphics.FromImage(pixelBuffer.Source))
{
Color background = this.Background;
if (background.A > 0)
{
using (var brush = new SolidBrush(background))
{
g.FillRectangle(brush, 0, 0, width, height);
}
}
using (var bitmap = new Bitmap(e.Width, e.Height, e.Width << 2, PixelFormat.Format32bppArgb, e.Buffer))
{
if (e.Width != width || e.Height != height)
{
g.CompositingQuality = CompositingQuality.HighSpeed;
g.InterpolationMode = this.InterpolationMode;
g.DrawImage(bitmap, 0, 0, width, height);
}
else
{
g.DrawImage(bitmap, 0, 0);
}
g.Flush();
}
}
}
invalidRect.Inflate(2, 2);
return(invalidRect);
}