public void DrawBuffer(IDrawingGraphics drawingGraphics)
{
//var dstTop = (drawingGraphics.VisibleRect.Top > 0) ? 0 : drawingGraphics.VisibleRect.Top;
var dstTop = Math.Max(0, drawingGraphics.CalculateY(0));
var dstLeft = drawingGraphics.CalculateX(this.Location.X);
var srcTop = (drawingGraphics.VisibleRect.Top > 0) ? drawingGraphics.VisibleRect.Top : 0;
var dstWidth = _buffer.Image.Width;
var height = this.Parent.Size.Height;
//drawingGraphics.DrawImage(_buffer.Image, 0, 0);
//return;
drawingGraphics.Graphics.DrawImage(_buffer.Image,
dstLeft, dstTop,
new Rectangle(0, srcTop, dstWidth, height), GraphicsUnit.Pixel);
return;
var hSrc = _buffer.Graphics.GetHdc();
var hDst = drawingGraphics.Graphics.GetHdc();
/*
var blendFunction = new BlendFunction
{
BlendOp = (byte)BlendOperation.AcSrcOver,
BlendFlags = (byte)BlendFlags.Zero,
SourceConstantAlpha = 100,
AlphaFormat = 0
};
DrawingAPI.AlphaBlend(hDst, 0, -drawingGraphics.VisibleRect.Top, Size.Width, Size.Height, hSrc,
0, 0, Size.Width, Size.Height, blendFunction);
*/
DrawingAPI.BitBlt(hDst,
dstLeft, dstTop,
dstWidth, height,
hSrc,
0, srcTop,
DrawingAPI.SRCCOPY
);
//DrawingAPI.BitBlt(hDst, 0, -drawingGraphics.VisibleRect.Top, Size.Width, Size.Height,
// hSrc, 0, 0,
// DrawingAPI.SRCCOPY
// );
/*
BitmapData a = _buffer.Image.LockBits(new Rectangle(0, 0, Size.Width, Size.Height), ImageLockMode.ReadOnly,
(PixelFormat) PixelFormatID.PixelFormat32bppARGB);
var factory = (IImagingFactory)Activator.CreateInstance(Type.GetTypeFromCLSID(new Guid("327ABDA8-072B-11D3-9D7B-0000F81EF32E")));
IImage image;
factory.CreateImageFromBuffer(a.Scan0, a., BufferDisposalFlag.BufferDisposalFlagNone, image);
_buffer.Image.UnlockBits(a);
*/
_buffer.Graphics.ReleaseHdc(hSrc);
drawingGraphics.Graphics.ReleaseHdc(hDst);
}
public override void Draw(IDrawingGraphics drawingGraphics)
{
var dg = drawingGraphics;
if (this.clipBitmap == null)
{
this.clipBitmap = new Bitmap(this.Size.Width.ToPixels(), this.Size.Height.ToPixels()-1); // TODO roundup errors!
}
if (CachePanning && panInProgress && this.clipBitmap != null)
{
drawingGraphics.Graphics.DrawImage(this.clipBitmap, drawingGraphics.CalculateX(this.HorizontalOffset - this.panH), drawingGraphics.CalculateY(this.VerticalOffset - this.panV));
}else
{
using (var clipBitmap = drawingGraphics.GetClipBuffer(new Rectangle(0, 0, this.Size.Width, this.Size.Height), this.clipBitmap))
{
/* Do shadows */
if (this.DrawShadows)
{
if (TopShadow == null)
{
TopShadow = new Bitmap(this.Size.Width.ToPixels(), drawingGraphics.CalculateHeight(ShadowHeight));
BottomShadow = new Bitmap(this.Size.Width.ToPixels(), drawingGraphics.CalculateHeight(ShadowHeight));
}
if (this.VerticalOffset < 0)
{
drawingGraphics.GetOpaqueClipBuffer(new Rectangle(0, 0, this.Size.Width, this.ShadowHeight), TopShadow).Dispose();
}
if (this.VerticalOffset > Math.Min(0, -this.Content.Size.Height + this.Size.Height))
{
drawingGraphics.GetOpaqueClipBuffer(new Rectangle(0, this.Size.Height + 1 - ShadowHeight,
this.Size.Width, ShadowHeight), BottomShadow).Dispose();
}
}
this.Content.Draw(clipBitmap.DrawingGr.CreateChild(new Point(this.HorizontalOffset, this.VerticalOffset),
this.content.TransformationScaling, this.content.TransformationCenter));
if (this.ShowScrollbars)
{
this.DrawScrollBar(clipBitmap.DrawingGr);
}
}
}
if (this.DrawShadows)
{
if (this.VerticalOffset < 0)
{
int cheight = 0;
for(int s = 0; s < ShadowSteps; s++)
{
drawingGraphics.Graphics.AlphaBlend(TopShadow,
new Rectangle(dg.CalculateX(0), dg.CalculateY(0)+cheight, TopShadow.Width, TopShadow.Height/ShadowSteps),
new Rectangle(0, cheight, TopShadow.Width, TopShadow.Height/ShadowSteps), 0.95f - 1f/(ShadowSteps+2)*s);
cheight += TopShadow.Height/ShadowSteps;
}
}
if (this.VerticalOffset > Math.Min(0, -this.Content.Size.Height + this.Size.Height))
{
int cheight = 0;
for(int s = 0; s < ShadowSteps; s++)
{
drawingGraphics.Graphics.AlphaBlend(BottomShadow,
new Rectangle(dg.CalculateX(0), dg.CalculateY(this.Size.Height-ShadowHeight)+cheight, BottomShadow.Width, BottomShadow.Height/ShadowSteps),
new Rectangle(0, cheight, BottomShadow.Width, BottomShadow.Height/ShadowSteps), 1f/(ShadowSteps+2)*(s+2));
cheight += BottomShadow.Height/ShadowSteps;
}
}
}
}
public override void Draw(IDrawingGraphics drawingGraphics)
{
var dg = drawingGraphics;
if (this.clipBitmap == null)
{
this.clipBitmap = new Bitmap(this.Size.Width.ToPixels(), this.Size.Height.ToPixels() - 1); // TODO roundup errors!
}
if (CachePanning && panInProgress && this.clipBitmap != null)
{
drawingGraphics.Graphics.DrawImage(this.clipBitmap, drawingGraphics.CalculateX(this.HorizontalOffset - this.panH), drawingGraphics.CalculateY(this.VerticalOffset - this.panV));
}
else
{
using (var clipBitmap = drawingGraphics.GetClipBuffer(new Rectangle(0, 0, this.Size.Width, this.Size.Height), this.clipBitmap))
{
/* Do shadows */
if (this.DrawShadows)
{
if (TopShadow == null)
{
TopShadow = new Bitmap(this.Size.Width.ToPixels(), drawingGraphics.CalculateHeight(ShadowHeight));
BottomShadow = new Bitmap(this.Size.Width.ToPixels(), drawingGraphics.CalculateHeight(ShadowHeight));
}
if (this.VerticalOffset < 0)
{
drawingGraphics.GetOpaqueClipBuffer(new Rectangle(0, 0, this.Size.Width, this.ShadowHeight), TopShadow).Dispose();
}
if (this.VerticalOffset > Math.Min(0, -this.Content.Size.Height + this.Size.Height))
{
drawingGraphics.GetOpaqueClipBuffer(new Rectangle(0, this.Size.Height + 1 - ShadowHeight,
this.Size.Width, ShadowHeight), BottomShadow).Dispose();
}
}
this.Content.Draw(clipBitmap.DrawingGr.CreateChild(new Point(this.HorizontalOffset, this.VerticalOffset),
this.content.TransformationScaling, this.content.TransformationCenter));
if (this.ShowScrollbars)
{
this.DrawScrollBar(clipBitmap.DrawingGr);
}
}
}
if (this.DrawShadows)
{
if (this.VerticalOffset < 0)
{
int cheight = 0;
for (int s = 0; s < ShadowSteps; s++)
{
drawingGraphics.Graphics.AlphaBlend(TopShadow,
new Rectangle(dg.CalculateX(0), dg.CalculateY(0) + cheight, TopShadow.Width, TopShadow.Height / ShadowSteps),
new Rectangle(0, cheight, TopShadow.Width, TopShadow.Height / ShadowSteps), 0.95f - 1f / (ShadowSteps + 2) * s);
cheight += TopShadow.Height / ShadowSteps;
}
}
if (this.VerticalOffset > Math.Min(0, -this.Content.Size.Height + this.Size.Height))
{
int cheight = 0;
for (int s = 0; s < ShadowSteps; s++)
{
drawingGraphics.Graphics.AlphaBlend(BottomShadow,
new Rectangle(dg.CalculateX(0), dg.CalculateY(this.Size.Height - ShadowHeight) + cheight, BottomShadow.Width, BottomShadow.Height / ShadowSteps),
new Rectangle(0, cheight, BottomShadow.Width, BottomShadow.Height / ShadowSteps), 1f / (ShadowSteps + 2) * (s + 2));
cheight += BottomShadow.Height / ShadowSteps;
}
}
}
}