private void applySepiaFilter(float sepiaIntensity)
{
// Apply a filter
GPUImageSepiaFilter filter = new GPUImageSepiaFilter();
filter.Intensity = sepiaIntensity;
// Create image object to process
GPUImagePicture stillImageSource = new GPUImagePicture(image, true);
stillImageSource.AddTarget(filter);
filter.AddTarget(imageView);
// Launch the process
stillImageSource.ProcessImage();
}
public async override void ViewDidLoad()
{
base.ViewDidLoad();
filter = new GPUImageTiltShiftFilter();
// This is now needed to make the filter run at the smaller output size
filter.ForceProcessingAtSize(imageView.SizeInPixels);
filter.AddTarget(imageView);
var inputImage = UIImage.FromBundle("WID-small.jpg");
picture = new GPUImagePicture(inputImage, true);
picture.AddTarget(filter);
await picture.ProcessImageAsync();
}
async partial void OnResampleSelectorChanged(UISegmentedControl sender)
{
switch (sender.SelectedSegment)
{
case 0:
// Linear downsampling
var passthroughFilter = new GPUImageBrightnessFilter();
passthroughFilter.ForceProcessingAtSize(new CGSize(640.0, 480.0));
var linearImageSource = new GPUImagePicture(inputImage);
linearImageSource.AddTarget(passthroughFilter);
passthroughFilter.UseNextFrameForImageCapture();
await linearImageSource.ProcessImageAsync();
imageView.Image = passthroughFilter.ToImage(UIImageOrientation.Up);
break;
case 1:
// Lanczos downsampling
var lanczosResamplingFilter = new GPUImageLanczosResamplingFilter();
lanczosResamplingFilter.ForceProcessingAtSize(new CGSize(640.0, 480.0));
var lanczosImageSource = new GPUImagePicture(inputImage);
lanczosImageSource.AddTarget(lanczosResamplingFilter);
lanczosResamplingFilter.UseNextFrameForImageCapture();
await lanczosImageSource.ProcessImageAsync();
imageView.Image = lanczosResamplingFilter.ToImage(UIImageOrientation.Up);
break;
case 2:
// Trilinear downsampling
var passthroughFilter2 = new GPUImageBrightnessFilter();
passthroughFilter2.ForceProcessingAtSize(new CGSize(640.0, 480.0));
var trilinearImageSource = new GPUImagePicture(inputImage, true);
trilinearImageSource.AddTarget(passthroughFilter2);
passthroughFilter2.UseNextFrameForImageCapture();
await trilinearImageSource.ProcessImageAsync();
imageView.Image = passthroughFilter2.ToImage(UIImageOrientation.Up);
break;
}
}
async partial void OnResampleSelectorChanged (UISegmentedControl sender)
{
switch (sender.SelectedSegment) {
case 0:
// Linear downsampling
var passthroughFilter = new GPUImageBrightnessFilter ();
passthroughFilter.ForceProcessingAtSize (new CGSize (640.0, 480.0));
var linearImageSource = new GPUImagePicture (inputImage);
linearImageSource.AddTarget (passthroughFilter);
passthroughFilter.UseNextFrameForImageCapture ();
await linearImageSource.ProcessImageAsync ();
imageView.Image = passthroughFilter.ToImage (UIImageOrientation.Up);
break;
case 1:
// Lanczos downsampling
var lanczosResamplingFilter = new GPUImageLanczosResamplingFilter ();
lanczosResamplingFilter.ForceProcessingAtSize (new CGSize (640.0, 480.0));
var lanczosImageSource = new GPUImagePicture (inputImage);
lanczosImageSource.AddTarget (lanczosResamplingFilter);
lanczosResamplingFilter.UseNextFrameForImageCapture ();
await lanczosImageSource.ProcessImageAsync ();
imageView.Image = lanczosResamplingFilter.ToImage (UIImageOrientation.Up);
break;
case 2:
// Trilinear downsampling
var passthroughFilter2 = new GPUImageBrightnessFilter ();
passthroughFilter2.ForceProcessingAtSize (new CGSize (640.0, 480.0));
var trilinearImageSource = new GPUImagePicture (inputImage, true);
trilinearImageSource.AddTarget (passthroughFilter2);
passthroughFilter2.UseNextFrameForImageCapture ();
await trilinearImageSource.ProcessImageAsync ();
imageView.Image = passthroughFilter2.ToImage (UIImageOrientation.Up);
break;
}
}
private void applySepiaFilter(float sepiaIntensity)
{
// Apply a filter
GPUImageSepiaFilter filter = new GPUImageSepiaFilter();
filter.Intensity = sepiaIntensity;
// Create image object to process
GPUImagePicture stillImageSource = new GPUImagePicture(image, true);
stillImageSource.AddTarget(filter);
filter.AddTarget(imageView);
// Launch the process
stillImageSource.ProcessImage();
}
async partial void OnFilterSelectorChanged(UISegmentedControl sender)
{
switch (sender.SelectedSegment)
{
case 0:
// Set up a manual image filtering chain
var vignetteFilter = new GPUImageVignetteFilter();
vignetteFilter.VignetteEnd = 0.6f;
vignetteFilter.VignetteStart = 0.4f;
var sepiaFilter = new GPUImageSepiaFilter();
sepiaFilter.AddTarget(vignetteFilter);
var imageSource = new GPUImagePicture(inputImageUrl);
imageSource.AddTarget(sepiaFilter);
vignetteFilter.UseNextFrameForImageCapture();
await imageSource.ProcessImageAsync();
using (var currentImage = vignetteFilter.ToImage())
using (var pngData = currentImage.AsPNG()) {
pngData.Save(path1, true);
}
imageView.Image = UIImage.FromFile(path1);
break;
case 1:
// Do a simpler image filtering
var imageFilter = new GPUImageSketchFilter();
using (var quickFilteredImage = imageFilter.CreateFilteredImage(inputImage))
using (var pngData = quickFilteredImage.AsPNG()) {
pngData.Save(path2, true);
}
imageView.Image = UIImage.FromFile(path2);
break;
}
}
async partial void OnFilterSelectorChanged (UISegmentedControl sender)
{
switch (sender.SelectedSegment) {
case 0:
// Set up a manual image filtering chain
var vignetteFilter = new GPUImageVignetteFilter ();
vignetteFilter.VignetteEnd = 0.6f;
vignetteFilter.VignetteStart = 0.4f;
var sepiaFilter = new GPUImageSepiaFilter ();
sepiaFilter.AddTarget (vignetteFilter);
var imageSource = new GPUImagePicture (inputImageUrl);
imageSource.AddTarget (sepiaFilter);
vignetteFilter.UseNextFrameForImageCapture ();
await imageSource.ProcessImageAsync ();
using (var currentImage = vignetteFilter.ToImage ())
using (var pngData = currentImage.AsPNG ()) {
pngData.Save (path1, true);
}
imageView.Image = UIImage.FromFile (path1);
break;
case 1:
// Do a simpler image filtering
var imageFilter = new GPUImageSketchFilter ();
using (var quickFilteredImage = imageFilter.CreateFilteredImage (inputImage))
using (var pngData = quickFilteredImage.AsPNG ()) {
pngData.Save (path2, true);
}
imageView.Image = UIImage.FromFile (path2);
break;
}
}
