public void DrawImage(Image image, Rectangle destRect, float srcX, float srcY, float srcWidth, float srcHeight, GraphicsUnit srcUnit, ImageAttributes imageAttrs)
{
if (image == null)
throw new ArgumentNullException ("image");
var srcRect1 = new RectangleF(srcX, srcY,srcWidth,srcHeight);
// If the source units are not the same we need to convert them
// The reason we check for Pixel here is that our graphics already has the Pixel's baked into the model view transform
if (srcUnit != graphicsUnit && srcUnit != GraphicsUnit.Pixel)
{
ConversionHelpers.GraphicsUnitConversion (srcUnit, graphicsUnit, image.HorizontalResolution, image.VerticalResolution, ref srcRect1);
}
// Obtain the subImage
var subImage = image.NativeCGImage.WithImageInRect (srcRect1);
// If we do not have anything to draw then we exit here
if (subImage.Width == 0 || subImage.Height == 0)
return;
// var transform = image.imageTransform;
//// // Reset our height on the transform to account for subImage
// transform.y0 = subImage.Height;
////
//// // Make sure we scale the image in case the source rectangle
//// // overruns our subimage bouncs width and/or height
// float scaleX = subImage.Width/srcRect1.Width;
// float scaleY = subImage.Height/srcRect1.Height;
// transform.Scale (scaleX, scaleY);
bool attributesSet = imageAttrs.isColorMatrixSet || imageAttrs.isGammaSet;
if (attributesSet) {
InitializeImagingContext ();
CIImage result = subImage;
if (imageAttrs.isColorMatrixSet) {
var ciFilter = CIFilter.FromName ("CIColorMatrix");
ciFilter.SetDefaults ();
ciFilter.SetValueForKey (result, new NSString ("inputImage"));
var inputRVector = new CIVector (imageAttrs.colorMatrix.Matrix00, imageAttrs.colorMatrix.Matrix01, imageAttrs.colorMatrix.Matrix02, imageAttrs.colorMatrix.Matrix03);
var inputGVector = new CIVector (imageAttrs.colorMatrix.Matrix10, imageAttrs.colorMatrix.Matrix11, imageAttrs.colorMatrix.Matrix12, imageAttrs.colorMatrix.Matrix13);
var inputBVector = new CIVector (imageAttrs.colorMatrix.Matrix20, imageAttrs.colorMatrix.Matrix21, imageAttrs.colorMatrix.Matrix22, imageAttrs.colorMatrix.Matrix23);
var inputAVector = new CIVector (imageAttrs.colorMatrix.Matrix30, imageAttrs.colorMatrix.Matrix31, imageAttrs.colorMatrix.Matrix32, imageAttrs.colorMatrix.Matrix33);
var inputBiasVector = new CIVector (imageAttrs.colorMatrix.Matrix40, imageAttrs.colorMatrix.Matrix41, imageAttrs.colorMatrix.Matrix42, imageAttrs.colorMatrix.Matrix43);
ciFilter.SetValueForKey (inputRVector, new NSString ("inputRVector"));
ciFilter.SetValueForKey (inputGVector, new NSString ("inputGVector"));
ciFilter.SetValueForKey (inputBVector, new NSString ("inputBVector"));
ciFilter.SetValueForKey (inputAVector, new NSString ("inputAVector"));
ciFilter.SetValueForKey (inputBiasVector, new NSString ("inputBiasVector"));
result = (CIImage)ciFilter.ValueForKey (new NSString ("outputImage"));
}
if (imageAttrs.isGammaSet) {
var ciFilter = CIFilter.FromName ("CIGammaAdjust");
ciFilter.SetDefaults ();
ciFilter.SetValueForKey (result, new NSString ("inputImage"));
var inputPower = NSNumber.FromFloat (imageAttrs.gamma);
ciFilter.SetValueForKey (inputPower, new NSString ("inputPower"));
result = (CIImage)ciFilter.ValueForKey (new NSString ("outputImage"));
}
subImage = ciContext.CreateCGImage (result, result.Extent);
}
transform = image.imageTransform;
transform.y0 = subImage.Height;
float scaleX1 = subImage.Width/srcRect1.Width;
float scaleY1 = subImage.Height/srcRect1.Height;
transform.Scale (scaleX1, scaleY1);
// Now draw our image
DrawImage (destRect, subImage, transform);
}
private void UpdateFilterProperties()
{
RectangleF rect = Window.ContentView.Frame;
var extent = new CIVector(rect.Left, rect.Bottom, rect.Width, rect.Height);
var center = new CIVector(rect.GetMidX(),rect.GetMidY());
copyMachineTransition.Extent = extent;
var xScale = rect.Width / transitionInputMaskImage.Extent.Width;
var yScale = rect.Height / transitionInputMaskImage.Extent.Height;
disintegrateTransform.Scale = yScale;
disintegrateTransform.AspectRatio = xScale / yScale;
disintegrateTransition.Mask = (CIImage) disintegrateTransform.ValueForKey((NSString) "outputImage");
flashTransition.Center = center;
flashTransition.Extent = extent;
modTransition.Center = center;
pageCurlShadowTransition.SetValueForKey(extent, (NSString) "inputExtent");
pageCurlShadowTransition.SetValueForKey(extent, (NSString) "inputShadowExtent");
rippleTransition.Center = center;
rippleTransition.Extent = extent;
}