public void GetProperties()
{
#if MONOMAC
using (var imageSource = CGImageSource.FromUrl(fileUrl)) {
#else
using (var imageSource = CGImageSource.FromUrl(NSUrl.FromFilename(filename))) {
#endif
CGImageOptions options = new CGImageOptions()
{
ShouldCache = false
};
var props = imageSource.GetProperties(options);
Assert.Null(props.PixelWidth, "PixelHeight-0");
Assert.Null(props.PixelHeight, "PixelWidth-0");
// image is "optimized" for devices (and a lot bigger at 10351 bytes ;-)
Assert.That(props.FileSize, Is.AtLeast(7318), "FileSize");
props = imageSource.GetProperties(0, options);
Assert.AreEqual(57, props.PixelWidth, "PixelHeight");
Assert.AreEqual(57, props.PixelHeight, "PixelWidth");
Assert.AreEqual(CGImageColorModel.RGB, props.ColorModel, "ColorModel");
Assert.AreEqual(8, props.Depth, "Depth");
}
}
public object GetImageFromUri(FileUri imageUri, int targetWidth, int targetHeight, int rotation)
{
using (Stream stream = GetFileSystem().OpenFile(imageUri, UniversalFileMode.Open, UniversalFileAccess.Read, UniversalFileShare.Read))
{
CGImageSource source = CGImageSource.FromUrl(imageUri.ToNSUrl());
CGImageOptions options = new CGImageOptions();
options.ShouldCache = false;
var props = source.CopyProperties(options, 0);
int imageWidth = ((NSNumber)props["PixelWidth"]).Int32Value;
int imageHeight = ((NSNumber)props["PixelHeight"]).Int32Value;
int scale = 1;
while (imageWidth / scale / 2 >= (nfloat)targetWidth &&
imageHeight / scale / 2 >= (nfloat)targetHeight)
{
scale *= 2;
}
stream.Seek(0, SeekOrigin.Begin);
UIImage image = UIImage.LoadFromData(NSData.FromUrl(imageUri.ToNSUrl()), scale);
if (rotation != 0)
{
float radians = rotation * (float)Math.PI / 180f;
CGRect imageFrame = new CGRect(0, 0, image.Size.Width, image.Size.Height);
CGAffineTransform t = CGAffineTransform.MakeRotation(radians);
imageFrame = t.TransformRect(imageFrame);
CGSize rotatedSize = new CGSize(imageFrame.Width, imageFrame.Height);
UIGraphics.BeginImageContext(rotatedSize);
using (CGContext context = UIGraphics.GetCurrentContext())
{
context.TranslateCTM(rotatedSize.Width / 2, rotatedSize.Height / 2);
context.RotateCTM(-radians);
context.ScaleCTM(1.0f, -1.0f);
image.Draw(new CGRect(-image.Size.Width / 2, -image.Size.Height / 2, image.Size.Width, image.Size.Height));
image = UIGraphics.GetImageFromCurrentImageContext();
}
UIGraphics.EndImageContext();
}
return(image);
}
}
public ImageSize ImageSizeIos(string localPath)
{
using (var src = CGImageSource.FromUrl(NSUrl.FromFilename(localPath)))
{
CGImageOptions options = new CGImageOptions()
{
ShouldCache = false
};
// do not forget the '0' image index or you won't get what you're looking for!
var p = src.GetProperties(0, options);
return(new ImageSize((int)p.PixelWidth, (int)p.PixelHeight));
}
}
public void CopyMetadata()
{
TestRuntime.AssertXcodeVersion(5, 0);
using (var imageSource = CGImageSource.FromUrl(NSUrl.FromFilename(filename))) {
CGImageOptions options = new CGImageOptions()
{
ShouldCacheImmediately = true
};
using (CGImageMetadata metadata = imageSource.CopyMetadata(0, options)) {
Console.WriteLine();
}
}
}
private CGImage CreateImage(CMSampleBuffer sampleBuffer)
{
CGImage image = null;
CMFormatDescription formatDescription = sampleBuffer.GetFormatDescription();
var subType = formatDescription.MediaSubType;
CMBlockBuffer blockBuffer = sampleBuffer.GetDataBuffer();
if (blockBuffer != null)
{
if (subType != (int)CMVideoCodecType.JPEG)
{
throw new Exception("Block buffer must be JPEG encoded.");
}
var jpegData = new NSMutableData();
jpegData.Length = blockBuffer.DataLength;
blockBuffer.CopyDataBytes(0, blockBuffer.DataLength, jpegData.Bytes);
using (var imageSource = CGImageSource.FromData(jpegData)) {
var decodeOptions = new CGImageOptions {
ShouldAllowFloat = false,
ShouldCache = false
};
image = imageSource.CreateImage(0, decodeOptions);
}
}
else
{
if (subType != (int)CVPixelFormatType.CV32BGRA)
{
throw new Exception("Image buffer must be BGRA encoded.");
}
CVImageBuffer imageBuffer = sampleBuffer.GetImageBuffer();
using (var colorSpace = CGColorSpace.CreateDeviceRGB())
using (var bitmapContext = new CGBitmapContext(imageBuffer.Handle,
(int)imageBuffer.DisplaySize.Width, (int)imageBuffer.DisplaySize.Height, 8, 0, colorSpace, CGImageAlphaInfo.NoneSkipFirst)) {
image = bitmapContext.ToImage();
}
}
return(image);
}
public void CopyMetadata()
{
if (!TestRuntime.CheckSystemAndSDKVersion(7, 0))
{
Assert.Ignore("Only on iOS7+");
}
using (var imageSource = CGImageSource.FromUrl(NSUrl.FromFilename(filename))) {
CGImageOptions options = new CGImageOptions()
{
ShouldCacheImmediately = true
};
using (CGImageMetadata metadata = imageSource.CopyMetadata(0, options)) {
Console.WriteLine();
}
}
}
private CGImage CreateImage (CMSampleBuffer sampleBuffer)
{
CGImage image = null;
CMFormatDescription formatDescription = sampleBuffer.GetFormatDescription ();
var subType = formatDescription.MediaSubType;
CMBlockBuffer blockBuffer = sampleBuffer.GetDataBuffer ();
if (blockBuffer != null) {
if (subType != (int)CMVideoCodecType.JPEG)
throw new Exception ("Block buffer must be JPEG encoded.");
var jpegData = new NSMutableData ();
jpegData.Length = blockBuffer.DataLength;
blockBuffer.CopyDataBytes (0, blockBuffer.DataLength, jpegData.Bytes);
using (var imageSource = CGImageSource.FromData (jpegData)) {
var decodeOptions = new CGImageOptions {
ShouldAllowFloat = false,
ShouldCache = false
};
image = imageSource.CreateImage (0, decodeOptions);
}
} else {
if (subType != (int)CVPixelFormatType.CV32BGRA)
throw new Exception ("Image buffer must be BGRA encoded.");
CVImageBuffer imageBuffer = sampleBuffer.GetImageBuffer ();
using (var colorSpace = CGColorSpace.CreateDeviceRGB ())
using (var bitmapContext = new CGBitmapContext (imageBuffer.Handle,
(int)imageBuffer.DisplaySize.Width, (int)imageBuffer.DisplaySize.Height, 8, 0, colorSpace, CGImageAlphaInfo.NoneSkipFirst)) {
image = bitmapContext.ToImage ();
}
}
return image;
}
