public DrawingLayer CalculateHistogram(DrawingLayer originalLayer)
{
DrawingLayer ping = originalLayer.Factory.CreateDrawingLayer(originalLayer.Width, originalLayer.Height);
DrawingLayer pong = originalLayer.Factory.CreateDrawingLayer(originalLayer.Width, originalLayer.Height);
float kernelHeight = 2;
Rectangle rect = new Rectangle(0, 0, originalLayer.Width, (int)Math.Ceiling(originalLayer.Height / kernelHeight));
DrawingLayer source = ping;
DrawingLayer target = pong;
SourceHeight = rect.Height;
originalLayer.ApplyEffect(this, source, rect, false);
rect.Height = (int)Math.Ceiling(rect.Height / kernelHeight);
while (rect.Height > 1)
{
SourceHeight = rect.Height;
source.ApplyEffect(this, target, rect, false);
//Swap layers for next round
DrawingLayer temp = source;
source = target;
target = temp;
rect.Height = (int)Math.Ceiling(rect.Height / kernelHeight);
}
//Target was switched with source, so source points to last result
return source;
}
internal void CopyToDrawingLayer(DrawingLayer drawingLayer, Rectangle destRect)
{
IntPtr pBuffer;
int bufferSize;
int stride = 0;
int hr = 0;
var rect = new WICRect
{
X = 0,
Y = 0,
Width = Width,
Height = Height
};
IWICBitmapLock imageLock;
hr = m_internalBitmap.Lock(ref rect,
WICBitmapLockFlags.WICBitmapLockRead,
out imageLock);
if(hr != 0)
throw new Exception("Could not lock the image");
hr = imageLock.GetDataPointer(out bufferSize, out pBuffer);
imageLock.GetStride(out stride);
if(destRect.IsEmpty)
drawingLayer.D2DRenderTarget.InternalBitmap.FromMemory(pBuffer, stride);
else
drawingLayer.D2DRenderTarget.InternalBitmap.FromMemory(pBuffer,
stride,
destRect.GetInternalRect());
Marshal.ReleaseComObject(imageLock);
}
public ImageData Lock(Rectangle lockRectangle, ImageLock lockType)
{
IWICBitmapLock imageLock;
WICBitmapLockFlags flags;
var rect = new WICRect
{
X = lockRectangle.X,
Y = lockRectangle.Y,
Width = lockRectangle.Width,
Height = lockRectangle.Height
};
switch(lockType)
{
case ImageLock.Read:
flags = WICBitmapLockFlags.WICBitmapLockRead;
break;
case ImageLock.Write:
flags = WICBitmapLockFlags.WICBitmapLockWrite;
break;
case ImageLock.ReadWrite:
flags = WICBitmapLockFlags.WICBitmapLockRead | WICBitmapLockFlags.WICBitmapLockWrite;
break;
default:
throw new ArgumentOutOfRangeException("lockType");
}
int hr = m_internalBitmap.Lock(ref rect,
flags,
out imageLock);
if (hr != 0)
throw new Exception("Could not lock the image");
return new ImageData(imageLock);
}
static Rectangle()
{
m_empty = new Rectangle();
}
public bool Equals(Rectangle other)
{
return other.X == X && other.Y == Y && other.Width == Width && other.Height == Height;
}
public void CopyFromImage(Image sourceImage, Rectangle destRect)
{
sourceImage.CopyToDrawingLayer(this, destRect);
}
public void ApplyEffect(ShaderEffect effect, DrawingLayer output, Rectangle targetRect, bool clearOutput = true)
{
m_directCanvasFactory.ApplyEffect(effect, this, output, targetRect, clearOutput);
}
protected override void DrawLayer(DrawingLayer outputLayer)
{
base.DrawLayer(outputLayer);
DepthFrame.MinThreshold = (ushort)this.MinThreshold;
DepthFrame.MaxThreshold = (ushort)this.MaxThreshold;
ushort minValue;
ushort maxValue;
var img = DepthFrame.ToDirectCanvasImage(Factory, out minValue, out maxValue);
effectLayer.CopyFromImage(img);
Rect crop = DepthFrame.Crop;
Rectangle rect = new Rectangle((int)crop.X, (int)crop.Y, (int)crop.Width, (int)crop.Height);
RectangleF rectf = new RectangleF((float)crop.X, (float)crop.Y, (float)crop.Width, (float)crop.Height);
colorMapEffect.MinThreshold = (float)MinThreshold;
colorMapEffect.MaxThreshold = (float)MaxThreshold;
colorMapEffect.MinValue = minValue;
colorMapEffect.MaxValue = maxValue;
unpackEffect.TexSize = new DirectCanvas.Misc.Size(effectLayer.Width, effectLayer.Height);
effectLayer.ApplyEffect(unpackEffect, effectLayer2, true);
effectLayer2.ApplyEffect(colorMapEffect, outputLayer, true);
outputLayer.BeginDraw();
outputLayer.DrawRectangle(rectBrushBackground, rectf, 3f);
outputLayer.DrawRectangle(rectBrushForeground, rectf, 1f);
outputLayer.EndDraw();
}
internal void ApplyEffect(ShaderEffect effect, DrawingLayer input, DrawingLayer output, Rectangle targetRect, bool clearOutput = true)
{
m_shaderRenderer.Apply(effect, input.RenderTargetTexture, output.RenderTargetTexture, targetRect, clearOutput);
}
/// <summary>
/// Applys a shader effect
/// </summary>
/// <param name="effect">The shader effect to apply</param>
/// <param name="inTexture">The DrawingLayer to be used as input</param>
/// <param name="outTexture">The DrawingLayer to be used as output</param>
/// <param name="targetRect"></param>
/// <param name="clearOutput">Clear the output before writing</param>
public void Apply(ShaderEffect effect, RenderTargetTexture inTexture, RenderTargetTexture outTexture, Rectangle targetRect, bool clearOutput)
{
var device = m_directCanvasFactory.DeviceContext.Device;
if (clearOutput)
outTexture.Clear(new Color4(0, 0, 0, 0));
outTexture.SetRenderTarget(new Viewport(targetRect.X, targetRect.Y, targetRect.Width, targetRect.Height, 0, 1));
device.PixelShader.SetShaderResource(inTexture.InternalShaderResourceView, 0);
if (effect.Filter == ShaderEffectFilter.Linear)
device.PixelShader.SetSampler(m_linearSamplerState, 0);
else if (effect.Filter == ShaderEffectFilter.Point)
device.PixelShader.SetSampler(m_pointSamplerState, 0);
effect.Draw();
}
