gm | 易学教程

Resize image to exact size by maintaining aspect ratio nodejs

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问题 I want to resize image to an exact size by maintaining aspect ratio and filling the empty space with transparency using nodejs. I am able to do it using canvas. But due to some server os issues I can not use canvas. I tried with imageMagick and gm. But couldn't find any option like these. Please show me a way to do this. Thanks in advance. 回答1: In ImageMagick, you can resize and fill to the exact size by convert image -resize WxH -background none -gravity center -extent WxH output Input: Here

Tampermonkey中文文档

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Userscript Header @name @namespace @version @author @description @homepage, @homepageURL, @website and @source @icon, @iconURL and @defaulticon @icon64 and @icon64URL @updateURL @downloadURL @supportURL @include @match @exclude @require @resource @connect @run-at @grant @noframes @unwrap @nocompat Application Programming Interface unsafeWindow Subresource Integrity GM_addStyle(css)(TM4.0+弃用) GM_deleteValue(name) GM_listValues() GM_addValueChangeListener(name, function(name, old_value, new_value, remote) {}) GM_removeValueChangeListener(listener_id) GM_setValue(name, value) GM_getValue(name,

GraphicsMagick DNG转JPG

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gm 下载与jpg png转换方式请参考： https://www.cnblogs.com/hapday/p/9220865.html gm dng格式图片转jpg出现***错误***： linux 需安装dcraw **yum install dcraw** 来源： CSDN 作者：爱我你会火_ 链接： https://blog.csdn.net/yuzhiqiang_1/article/details/103861610

Nodejs bluebird promise fails while processing image

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问题 //Created a promise for each image size. var promises = sizes.map(function (size) { return new Promise(function (resolve, reject) { var destinationDir = fileUtil.getAbsolutePathOfImage(destinationPath); fileUtil.createDirectoryIfNotExists(destinationDir); destinationDir += size.src; fileUtil.createDirectoryIfNotExists(destinationDir); //Resize the image. //console.log('imagefile : ' + JSON.stringify(imageFile)); //console.log('destinationDir: ' + JSON.stringify(destinationDir)); //Called an

Resize and compose two or more images using gm in Nodejs

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问题 Given two images, say under img (in size of 1024x768) folder (img1.png and img2.png), I need to resize img2 (say 300x300) and put on img1 in x and y (say 100, 200) from top left of img1. The end result should be 1024x768 size image. Using gm (https://github.com/aheckmann/gm), tried this: gm('./img/img1.png') .composite('./img/img2.png') .geometry('300x300+100+200') .write('resultGM.png', (err) => { if (err) console.log(err); }); Expectedly (because of chain on whole operation) it produces

Swift 4: tableView and scopeButtons slide under searchBar in iOS 11

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问题 I made an App in Swift 3 with a tableView that has a searchBar in its header. The searchBar also has a bar with a scopeButton. In iOS 10 the searchBar slid up to where the navigationBar was and everything worked fine. In iOS 11 however the tableView slides under the searchBar when it becomes active, so that the first cell is almost completely covered. When I now tap a cell to move to another View and go back, the scopeButton moved under the searchBar. Now the first cell is visible again but

Swift 4: tableView and scopeButtons slide under searchBar in iOS 11

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I made an App in Swift 3 with a tableView that has a searchBar in its header. The searchBar also has a bar with a scopeButton. In iOS 10 the searchBar slid up to where the navigationBar was and everything worked fine. In iOS 11 however the tableView slides under the searchBar when it becomes active, so that the first cell is almost completely covered. When I now tap a cell to move to another View and go back, the scopeButton moved under the searchBar. Now the first cell is visible again but the distance to the searchBar is a little to big and of course the scopeButton is completely unusable. I

how to pass image buffer data to gm in() GraphicsMagic

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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: var buf = require('fs').readFileSync('test.jpg'); gm().in('-page', '+0+0').in(buf,'test.jpg').write('output.jpg', function (err) { if (err) console.log(err); }) in this case i want to pass buffer data as input to the gm.in() method. Below is the link I'm referencing but in it, an image path is used as an input. I want to use buffer data as an input. How can I do this? Tile four images together using Node.js and GraphicsMagick 回答1: Actually I was creating a poster with two different image one is template image "background" and 2nd is top

JS: Promise doesn't return value

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问题 I need to get a value of an asynchronous function. I tried to use Promise, but that does not work: const res = new Promise(function (resolve, reject) { gm(readStream).size({ bufferStream: true }, function (err, size) { if (!err) resolve(size) }) }) console.log(res) The result I get is Promise { <pending> } 回答1: Promises are an abstraction for callbacks, not magic. They can't make asynchronous code synchronous. The correct solution is: const res = new Promise(function (resolve, reject) { gm

GraphicsMagick的命令概览

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GraphicsMagick 的命令概览 ---------------------------------------------------------------------------- [ convert | identify | mogrify | composite | montage | compare | display | animate | import | conjure ] convert：转换图像格式和大小，模糊，裁剪，驱除污点，抖动，临近，图片上画图片，加入新图片，生成缩略图等。 identify：描述一个或较多图像文件的格式和特性。 mogrify：按规定尺寸***一个图像，模糊，裁剪，抖动等。Mogrify改写最初的图像文件然后写到一个不同的图像文件。 composite：根据一个图片或多个图片组合生成图片。 montage：创建一些分开的要素图像。在含有要素图像任意的装饰图片，如边框、结构、图片名称等。 compare：在算术上和视觉上评估不同的图片***其它的改造图片。 display：如果你拥有一个X server的系统，它可以按次序的显示图片 animate：利用X server显示动画图片 import：在X server或任何可见的窗口上输出图片文件。你可以捕获单一窗口，整个的荧屏或任何荧屏的矩形部分。 conjure