![]() ![]() Make sure to check the encoder's documentation to confirm the expected data format. In other cases, you will have to provide raw byte data. Some libraries use a default image class (for example, the Swift implementation uses UIImage). Once you have the encoder, you will need to obtain a representation of the image. The key step is to locate an encoder for your chosen language, which can often be found in the woltapp/blurhash repository. The process of generating a blurhash can be accomplished in various languages and server technologies, similar to the one using JavaScript. A value of 9 will give the best results but may take longer to generate the hash. ![]() However, they must be within the range of 1 to 9 and have an aspect ratio similar to the uploaded image. These values can be calculated or hard-coded on the server or specified by the user. I want to put the image in the top of the space. height, componentX, componentY ) Īdditionally, the request can include two parameters: componentX and componentY, are passed through the algorithm. But I still got the whitespace above the image as when I set the resizeMode to contain, it will make the image in the center of the space. const ) const blurhash = encode (data, info. const sharp = require ( 'sharp' ) // Import the encode function from the blurhash package. const multer = require ( 'multer' ) // Sharp allows you to receive a data buffer from the uploaded image. Next, import all required functions from installed packages and initialize multer: // Multer is a middleware for handling `multipart/form-data`. 'scale-down' - The image is sized as if none or contain were specified, whichever would result in a smaller concrete image size. When specified, the exact position can be controlled with contentPosition prop. 'none' - The image is not resized and is centered by default. If necessary, the image will be stretched or squished to fit. 'fill' - The image is sized to entirely fill the container box. 'contain' - The image is scaled down or up to maintain its aspect ratio while fitting within the container box. If the image's aspect ratio does not match the aspect ratio of its box, then the object will be clipped to fit. 'cover' - The image is sized to maintain its aspect ratio while filling the container box. In a variety of ways such as "preserve that aspect ratio" or "stretch up and take up as much space as possible". This property tells the image to fill the container Default: 'cover'ĭetermines how the image should be resized to fit its container.React Native- Resize Image and convert to base64. Refer to 's documentation for more insight, and create your own custom component when needed. I use react native, so any solution for React/Native, node, or native javascript is acceptable. You might not want to use in some cases, since the implementation is basic. To handle this use case, you can use the component, which has the same props as, and add whatever children to it you would like to layer on top of it. Background Image via Nesting Ī common feature request from developers familiar with the web is background-image. Feel free to use it as your data structure to store more information about your image. On the user side, this lets you annotate the object with useful attributes such as the dimension of the image in order to compute the size it's going to be displayed in. via flex), you may need to manually set and transparently support spriting on all the existing call sites. If you need to scale the image dynamically (i.e. Note that image sources required this way include size (width, height) info for the Image. In order for this to work, the image name in require has to be known statically. Images can be distributed via npm packages.The bundler knows the image dimensions, no need to duplicate it in the code.Adding and changing images doesn't require app recompilation, you can refresh the simulator as you normally do. ![]() Only the images that are actually used will be packaged into your app.you don't have to worry about name collisions. Images live in the same folder as your JavaScript code.On Windows, you might need to restart the bundler if you add new images to your project. If there is no image matching the screen density, the closest best option will be selected. For example, will be used on an iPhone 7, while will be used on an iPhone 7 Plus or a Nexus 5. the bundler will bundle and serve the image corresponding to device's screen density. ![]()
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