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Improve ImageAsset scaling (#5110)

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* Do not depend on current device screen while calculating Image Asset size.

* Scale the image asset to the exact requested size.

* Process image assets natively, pass keepAspectRatio based on the stretch property and Asset options.

* Fixed the splashscreen resource name as it cannot be read when containing a dot.

* Updated the Image Asset scale and rotate logic based on the Native one.

* Make the ImageAsset size more important than the Image decode size as its more specific.

* Fixed tslint errors.

* Added filePath support in the ImageAsset constructor for iOS in order to unify it with the Android implementation, support for relative files and file not found support errors.

* Added unit tests for ImageAssets.

* Added a sample app for UI testing of image-view with ImageAsset src.

* chore: apply PR comments
This commit is contained in:
Dimitar Tachev
2018-02-28 14:04:01 +02:00
committed by Alexander Djenkov
parent 27622d83ba
commit a94ec9946f
17 changed files with 262 additions and 21 deletions
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16
tns-core-modules/image-asset/image-asset.ios.ts
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@@ -1,13 +1,21 @@
import * as common from "./image-asset-common";
import { path as fsPath, knownFolders } from "../file-system";
global.moduleMerge(common, exports);
export class ImageAsset extends common.ImageAsset {
private _ios: PHAsset;
constructor(asset: PHAsset | UIImage) {
constructor(asset: string | PHAsset | UIImage) {
super();
if (asset instanceof UIImage) {
if (typeof asset === "string") {
if (asset.indexOf("~/") === 0) {
asset = fsPath.join(knownFolders.currentApp().path, asset.replace("~/", ""));
}
this.nativeImage = UIImage.imageWithContentsOfFile(asset);
}
else if (asset instanceof UIImage) {
this.nativeImage = asset
}
else {
@@ -24,6 +32,10 @@ export class ImageAsset extends common.ImageAsset {
}
public getImageAsync(callback: (image, error) => void) {
if (!this.ios && !this.nativeImage) {
callback(null, "Asset cannot be found.");
}
let srcWidth = this.nativeImage ? this.nativeImage.size.width : this.ios.pixelWidth;
let srcHeight = this.nativeImage ? this.nativeImage.size.height : this.ios.pixelHeight;
let requestedSize = common.getRequestedImageSize({ width: srcWidth, height: srcHeight }, this.options);