Adopt UIGraphicsImageRenderer API

Summary:
Apple suggested to this new API on iOS 10+.

> // Any new bitmap drawing code is encouraged to use UIGraphicsImageRenderer in lieu of this API.

WWDC18 Reference: https://developer.apple.com/videos/play/wwdc2018/219/
> Use UIGraphicsImageRenderer to create and draw to an image buffer
Supports Wide Color, unlike UIGraphicsBeginImageContext()
Combine with UIImageView for efficient offscreen rendering

Per https://nshipster.com/image-resizing/#performance-benchmarks, the new API runs even faster than the C version, probably due to more smart context reuses/management.

Changelog:
[iOS][Changed] - Adopt UIGraphicsImageRenderer API

Reviewed By: philIip

Differential Revision: D35699584

fbshipit-source-id: 7a1e2109d5e121fb396c1014f4ed0a892211b0cc

Libraries/Image/RCTImageBlurUtils.m

@@ -22,10 +22,13 @@
  if (CGImageGetBitsPerPixel(imageRef) != 32 ||
  CGImageGetBitsPerComponent(imageRef) != 8 ||
  !((CGImageGetBitmapInfo(imageRef) & kCGBitmapAlphaInfoMask))) {
- UIGraphicsBeginImageContextWithOptions(inputImage.size, NO, inputImage.scale);
- [inputImage drawAtPoint:CGPointZero];
- imageRef = UIGraphicsGetImageFromCurrentImageContext().CGImage;
- UIGraphicsEndImageContext();
+ UIGraphicsImageRendererFormat *const rendererFormat = [UIGraphicsImageRendererFormat defaultFormat];
+ rendererFormat.scale = inputImage.scale;
+ UIGraphicsImageRenderer *const renderer = [[UIGraphicsImageRenderer alloc] initWithSize:inputImage.size format:rendererFormat];
+
+ imageRef = [renderer imageWithActions:^(UIGraphicsImageRendererContext *_Nonnull context) {
+ [inputImage drawAtPoint:CGPointZero];
+ }].CGImage;
  }
 
  vImage_Buffer buffer1, buffer2;
@@ -51,7 +54,7 @@
 
  //create temp buffer
  vImage_Error tempBufferSize = vImageBoxConvolve_ARGB8888(&buffer1, &buffer2, NULL, 0, 0, boxSize, boxSize,
-  NULL, kvImageGetTempBufferSize | kvImageEdgeExtend);
+ NULL, kvImageGetTempBufferSize | kvImageEdgeExtend);
  if (tempBufferSize < 0) {
  free(buffer1.data);
  free(buffer2.data);

Libraries/Image/RCTImageUtils.m

@@ -370,13 +370,14 @@ BOOL RCTUpscalingRequired(CGSize sourceSize, CGFloat sourceScale,
  }
 
  BOOL opaque = !RCTImageHasAlpha(image.CGImage);
- UIGraphicsBeginImageContextWithOptions(destSize, opaque, destScale);
- CGContextRef currentContext = UIGraphicsGetCurrentContext();
- CGContextConcatCTM(currentContext, transform);
- [image drawAtPoint:CGPointZero];
- UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
- UIGraphicsEndImageContext();
- return result;
+ UIGraphicsImageRendererFormat *const rendererFormat = [UIGraphicsImageRendererFormat defaultFormat];
+ rendererFormat.opaque = opaque;
+ rendererFormat.scale = destScale;
+ UIGraphicsImageRenderer *const renderer = [[UIGraphicsImageRenderer alloc] initWithSize:destSize format:rendererFormat];
+ return [renderer imageWithActions:^(UIGraphicsImageRendererContext *_Nonnull context) {
+ CGContextConcatCTM(context.CGContext, transform);
+ [image drawAtPoint:CGPointZero];
+ }];
 }
 
 BOOL RCTImageHasAlpha(CGImageRef image)