public Task <IBitmap> Load(Stream sourceStream, float?desiredWidth, float?desiredHeight)
{
var data = NSData.FromStream(sourceStream);
var tcs = new TaskCompletionSource <IBitmap>();
#if UIKIT
NSRunLoop.InvokeInBackground(() =>
{
try
{
var bitmap = UIImage.LoadFromData(data);
if (bitmap == null)
{
throw new Exception("Failed to load image");
}
tcs.TrySetResult(new CocoaBitmap(bitmap));
}
catch (Exception ex)
{
LogHost.Default.Debug(ex, "Unable to parse the known colour name.");
tcs.TrySetException(ex);
}
});
#else
tcs.TrySetResult(new CocoaBitmap(new UIImage(data)));
#endif
return(tcs.Task);
}
/// <inheritdoc />
public Task <IBitmap> LoadFromResource(string source, float?desiredWidth, float?desiredHeight)
{
var tcs = new TaskCompletionSource <IBitmap>();
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
try
{
#if UIKIT
var bitmap = UIImage.FromBundle(source);
#else
var bitmap = UIImage.ImageNamed(source);
#endif
if (bitmap == null)
{
throw new Exception("Failed to load image from resource: " + source);
}
tcs.TrySetResult(new CocoaBitmap(bitmap));
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
});
return(tcs.Task);
}
/// <inheritdoc />
public Task <IBitmap> Load(Stream sourceStream, float?desiredWidth, float?desiredHeight)
{
var data = NSData.FromStream(sourceStream);
var tcs = new TaskCompletionSource <IBitmap>();
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
try
{
#if UIKIT
var bitmap = UIImage.LoadFromData(data);
if (bitmap == null)
{
throw new Exception("Failed to load image");
}
tcs.TrySetResult(new CocoaBitmap(bitmap));
#else
tcs.TrySetResult(new CocoaBitmap(new UIImage(data)));
#endif
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
});
return(tcs.Task);
}
/// <summary>
/// Converts a <see cref="UIImage"/> to a splat <see cref="IBitmap"/>.
/// </summary>
/// <param name="value">The native bitmap to convert from.</param>
/// <param name="copy">Whether to copy the android bitmap or not.</param>
/// <returns>A <see cref="IBitmap"/> bitmap.</returns>
public static IBitmap FromNative(this UIImage value, bool copy = false)
{
if (copy)
{
return(new CocoaBitmap((UIImage)value.Copy()));
}
return(new CocoaBitmap(value));
}
/// <summary>
/// Converts a <see cref="UIImage"/> to a splat <see cref="IBitmap"/>.
/// </summary>
/// <param name="value">The native bitmap to convert from.</param>
/// <param name="copy">Whether to copy the android bitmap or not.</param>
/// <returns>A <see cref="IBitmap"/> bitmap.</returns>
public static IBitmap FromNative(this UIImage value, bool copy = false)
{
if (value is null)
{
throw new System.ArgumentNullException(nameof(value));
}
if (copy)
{
return(new CocoaBitmap((UIImage)value.Copy()));
}
return(new CocoaBitmap(value));
}
public object GenerateGlyph(ITextViewLine line, IGlyphTag tag)
{
if (!(tag is T))
{
return(null);
}
#if MAC
if (nsImageCache == null)
{
nsImageCache = (AppKit.NSImage)imageService.GetImage(imageId);
}
var imageView = AppKit.NSImageView.FromImage(nsImageCache);
imageView.SetFrameSize(imageView.FittingSize);
return(imageView);
#else
throw new NotImplementedException();
#endif
}
public Task <IBitmap> LoadFromResource(string source, float?desiredWidth, float?desiredHeight)
{
var tcs = new TaskCompletionSource <IBitmap>();
#if UIKIT
NSRunLoop.InvokeInBackground(() =>
{
try
{
var bitmap = UIImage.FromBundle(source);
if (bitmap == null)
{
throw new Exception("Failed to load image from resource: " + source);
}
tcs.TrySetResult(new CocoaBitmap(bitmap));
}
catch (Exception ex)
{
LogHost.Default.Debug(ex, "Unable to parse the known colour name.");
tcs.TrySetException(ex);
}
});
#else
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
try
{
var bitmap = UIImage.ImageNamed(source);
if (bitmap == null)
{
throw new Exception("Failed to load image from resource: " + source);
}
tcs.TrySetResult(new CocoaBitmap(bitmap));
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
});
#endif
return(tcs.Task);
}
private protected override bool TryOpenSourceSync(out _NativeImage image)
{
// Convert RGB colorspace.
var bgraBuffer = _buffer.Data;
var rgbaBuffer = new byte[bgraBuffer.Length];
for (var i = 0; i < bgraBuffer.Length; i += 4)
{
rgbaBuffer[i + 3] = bgraBuffer[i + 3]; // a
rgbaBuffer[i + 0] = bgraBuffer[i + 2]; // r
rgbaBuffer[i + 1] = bgraBuffer[i + 1]; // g
rgbaBuffer[i + 2] = bgraBuffer[i + 0]; // b
}
using (var dataProvider = new CGDataProvider(rgbaBuffer, 0, rgbaBuffer.Length))
using (var colorSpace = CGColorSpace.CreateDeviceRGB())
{
const int bitsPerComponent = 8;
const int bytesPerPixel = 4;
var img = new CGImage(
PixelWidth,
PixelHeight,
bitsPerComponent: bitsPerComponent,
bitsPerPixel: bitsPerComponent * bytesPerPixel,
bytesPerRow: bytesPerPixel * PixelWidth,
colorSpace,
CGImageAlphaInfo.Last,
dataProvider,
decode: null,
shouldInterpolate: false,
CGColorRenderingIntent.Default);
#if __MACOS__
image = new _NativeImage(img, new CGSize(PixelWidth, PixelHeight));
#else
image = _NativeImage.FromImage(img);
#endif
return(true);
}
}
public static void TestCapture()
{
Foundation.NSNumber mainScreen = (Foundation.NSNumber)AppKit.NSScreen.MainScreen.DeviceDescription["NSScreenNumber"];
using (CoreGraphics.CGImage cgImage = CreateImage(mainScreen.UInt32Value))
{
// https://stackoverflow.com/questions/17334786/get-pixel-from-the-screen-screenshot-in-max-osx/17343305#17343305
// Get byte-array from CGImage
// https://gist.github.com/zhangao0086/5fafb1e1c0b5d629eb76
AppKit.NSBitmapImageRep bitmapRep = new AppKit.NSBitmapImageRep(cgImage);
// var imageData = bitmapRep.representationUsingType(NSBitmapImageFileType.NSPNGFileType, properties: [:])
Foundation.NSData imageData = bitmapRep.RepresentationUsingTypeProperties(AppKit.NSBitmapImageFileType.Png);
long len = imageData.Length;
byte[] bytes = new byte[len];
System.Runtime.InteropServices.GCHandle pinnedArray = System.Runtime.InteropServices.GCHandle.Alloc(bytes, System.Runtime.InteropServices.GCHandleType.Pinned);
System.IntPtr pointer = pinnedArray.AddrOfPinnedObject();
// Do your stuff...
imageData.GetBytes(pointer, new System.IntPtr(len));
pinnedArray.Free();
using (AppKit.NSImage nsImage = new AppKit.NSImage(cgImage, new System.Drawing.SizeF(cgImage.Width, cgImage.Height)))
{
// ImageView.Image = nsImage;
// And now ? How to get the image bytes ?
// https://theconfuzedsourcecode.wordpress.com/2016/02/24/convert-android-bitmap-image-and-ios-uiimage-to-byte-array-in-xamarin/
// https://stackoverflow.com/questions/5645157/nsimage-from-byte-array
// https://stackoverflow.com/questions/53060723/nsimage-source-from-byte-array-cocoa-app-xamarin-c-sharp
// https://gist.github.com/zhangao0086/5fafb1e1c0b5d629eb76
// https://www.quora.com/What-is-a-way-to-convert-UIImage-to-a-byte-array-in-Swift?share=1
// https://stackoverflow.com/questions/17112314/converting-uiimage-to-byte-array
} // End Using nsImage
} // End Using cgImage
} // End Sub TestCapture
public Image(AppKit.NSImage img)
{
var tmp = new CoreGraphics.CGRect();
Init(img.AsCGImage(ref tmp, null, null));
}
