📅  最后修改于: 2023-12-03 14:59:18.129000             🧑  作者: Mango
Angular Img is a JavaScript library for working with images in Angular applications. It provides various features and utilities to manipulate, modify, and enhance images effortlessly. Whether you need to resize, crop, rotate, compress, or apply filters to images, Angular Img has got you covered.
Image Loading: Angular Img simplifies the image loading process in Angular applications. It provides directives and components that can be easily integrated into your templates to load images asynchronously.
Image Manipulation: With Angular Img, you can perform a wide range of image manipulation operations. These operations include resizing, cropping, rotating, flipping, and watermarking images.
Filter Effects: Angular Img allows you to apply various filter effects to your images. You can apply grayscale, sepia, blur, brightness, contrast, saturation, and other filter effects to enhance the visual appeal of your images.
Image Compression: Reducing the size of images is crucial for better performance and faster loading times. Angular Img provides features for compressing images without compromising their quality. You can set compression algorithms, resize dimensions, and generate optimized output.
Image Annotations: Angular Img enables you to add annotations, text overlays, and stickers to your images. You can easily customize the appearance, position, and style of annotations to make your images more informative and engaging.
Image Conversion: Converting images from one format to another is made easy with Angular Img. You can convert images to different file formats like JPEG, PNG, GIF, and more, without losing any quality.
# Example 1 - Load and Display Image
To load and display an image using Angular Img, you can use the following code:
```html
<img src="path_to_image.jpg" alt="My Image" app-img-loader>
Here, app-img-loader
is a custom directive provided by Angular Img for asynchronous image loading.
To resize and crop an image using Angular Img, you can use the following code:
import { ImgService } from 'angular-img';
// ...
constructor(private imgService: ImgService) {}
resizeAndCropImage(image: File) {
this.imgService.loadImage(image).then((loadedImage) => {
const resizedImage = this.imgService.resize(loadedImage, { width: 300, height: 200 });
const croppedImage = this.imgService.crop(resizedImage, { x: 50, y: 50, width: 200, height: 100 });
// Display the modified image
document.getElementById('modified-image').setAttribute('src', croppedImage.toDataURL());
});
}
This example demonstrates how to resize and crop an image using Angular Img's resize
and crop
methods.
To apply filter effects to an image using Angular Img, you can use the following code:
import { ImgService, Filter } from 'angular-img';
// ...
constructor(private imgService: ImgService) {}
applyFilterEffects(image: File) {
this.imgService.loadImage(image).then((loadedImage) => {
const filteredImage = this.imgService.applyFilters(loadedImage, [Filter.GRAYSCALE, Filter.BLUR, Filter.BRIGHTNESS]);
// Display the filtered image
document.getElementById('filtered-image').setAttribute('src', filteredImage.toDataURL());
});
}
This example demonstrates how to apply grayscale, blur, and brightness filter effects to an image using Angular Img's applyFilters
method.
To compress an image using Angular Img, you can use the following code:
import { ImgService, CompressionAlgorithm } from 'angular-img';
// ...
constructor(private imgService: ImgService) {}
compressImage(image: File) {
this.imgService.loadImage(image).then((loadedImage) => {
const compressedImage = this.imgService.compress(loadedImage, { algorithm: CompressionAlgorithm.WEBP, quality: 0.8 });
// Display the compressed image
document.getElementById('compressed-image').setAttribute('src', compressedImage.toDataURL());
});
}
This example demonstrates how to compress an image using Angular Img's compress
method.
To add annotations to an image using Angular Img, you can use the following code:
import { ImgService, Annotation } from 'angular-img';
// ...
constructor(private imgService: ImgService) {}
addAnnotations(image: File) {
this.imgService.loadImage(image).then((loadedImage) => {
const annotation: Annotation = {
text: 'Sample Annotation',
position: { x: 50, y: 50 },
style: { color: 'red', fontSize: '24px' }
};
const annotatedImage = this.imgService.addAnnotation(loadedImage, annotation);
// Display the annotated image
document.getElementById('annotated-image').setAttribute('src', annotatedImage.toDataURL());
});
}
This example demonstrates how to add text annotations to an image using Angular Img's addAnnotation
method.
Markdown content ends here. Please note that the above code examples assume the basic knowledge of Angular and the installation of the "angular-img" library.
This was just a brief introduction to Angular Img, and there's a lot more to explore and learn. Feel free to dive into the official documentation for more information and detailed usage guidelines.