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feat(image-asset-ios): add autoScaleFactor option to switch auto scaling (#6127)

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This commit is contained in:
Alexander Djenkov
2018-07-31 10:12:27 +03:00
committed by GitHub
parent 7e89f942b4
commit 81e63ee19e
5 changed files with 32 additions and 11 deletions
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9
tns-core-modules/image-asset/image-asset.ios.ts
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@@ -50,7 +50,7 @@ export class ImageAsset extends common.ImageAsset {
let imageRequestOptions = PHImageRequestOptions.alloc().init();
imageRequestOptions.deliveryMode = PHImageRequestOptionsDeliveryMode.HighQualityFormat;
imageRequestOptions.networkAccessAllowed = true;
PHImageManager.defaultManager().requestImageForAssetTargetSizeContentModeOptionsResultHandler(this.ios, requestedSize, PHImageContentMode.AspectFit, imageRequestOptions,
(image, imageResultInfo) => {
if (image) {
@@ -64,8 +64,11 @@ export class ImageAsset extends common.ImageAsset {
);
}
private scaleImage(image: UIImage, requestedSize: {width: number, height: number}): UIImage {
UIGraphicsBeginImageContextWithOptions(requestedSize, false, 0.0);
private scaleImage(image: UIImage, requestedSize: { width: number, height: number }): UIImage {
// scaleFactor = 0 takes the scale factor of the devices's main screen.
const scaleFactor = this.options && this.options.autoScaleFactor === false ? 1.0 : 0.0;
UIGraphicsBeginImageContextWithOptions(requestedSize, false, scaleFactor);
image.drawInRect(CGRectMake(0, 0, requestedSize.width, requestedSize.height));
let resultImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();