Install git in docker image

[github/Chocobozzz/PeerTube.git] / server / helpers / image-utils.ts

diff --git a/server/helpers/image-utils.ts b/server/helpers/image-utils.ts
index f2f6a004f7ede83514013810f956ab1b73830c7c..b174ae4369208e8d10eeec1816425c6d4ed7fb63 100644 (file)
--- a/server/helpers/image-utils.ts
+++ b/server/helpers/image-utils.ts
@@ -1,8 +1,13 @@
-import { remove, rename } from 'fs-extra'
-import { convertWebPToJPG } from './ffmpeg-utils'
+import { copy, readFile, remove, rename } from 'fs-extra'
+import Jimp, { read } from 'jimp'
+import { getLowercaseExtension } from '@shared/core-utils'
+import { buildUUID } from '@shared/extra-utils'
+import { convertWebPToJPG, processGIF } from './ffmpeg-utils'
 import { logger } from './logger'
 
-const Jimp = require('jimp')
+function generateImageFilename (extension = '.jpg') {
+  return buildUUID() + extension
+}
 
 async function processImage (
   path: string,
@@ -10,38 +15,104 @@ async function processImage (
   newSize: { width: number, height: number },
   keepOriginal = false
 ) {
+  const extension = getLowercaseExtension(path)
+
   if (path === destination) {
-    throw new Error('Jimp needs an input path different that the output path.')
+    throw new Error('Jimp/FFmpeg needs an input path different that the output path.')
   }
 
   logger.debug('Processing image %s to %s.', path, destination)
 
-  let jimpInstance: any
+  // Use FFmpeg to process GIF
+  if (extension === '.gif') {
+    await processGIF(path, destination, newSize)
+  } else {
+    await jimpProcessor(path, destination, newSize, extension)
+  }
+
+  if (keepOriginal !== true) await remove(path)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  generateImageFilename,
+  processImage
+}
+
+// ---------------------------------------------------------------------------
+
+async function jimpProcessor (path: string, destination: string, newSize: { width: number, height: number }, inputExt: string) {
+  let sourceImage: Jimp
+  const inputBuffer = await readFile(path)
 
   try {
-    jimpInstance = await Jimp.read(path)
+    sourceImage = await read(inputBuffer)
   } catch (err) {
-    logger.debug('Cannot read %s with jimp. Try to convert the image using ffmpeg first.', { err })
+    logger.debug('Cannot read %s with jimp. Try to convert the image using ffmpeg first.', path, { err })
 
     const newName = path + '.jpg'
     await convertWebPToJPG(path, newName)
     await rename(newName, path)
 
-    jimpInstance = await Jimp.read(path)
+    sourceImage = await read(path)
   }
 
   await remove(destination)
 
-  await jimpInstance
-    .resize(newSize.width, newSize.height)
-    .quality(80)
-    .writeAsync(destination)
+  // Optimization if the source file has the appropriate size
+  const outputExt = getLowercaseExtension(destination)
+  if (skipProcessing({ sourceImage, newSize, imageBytes: inputBuffer.byteLength, inputExt, outputExt })) {
+    return copy(path, destination)
+  }
 
-  if (keepOriginal !== true) await remove(path)
+  await autoResize({ sourceImage, newSize, destination })
 }
 
-// ---------------------------------------------------------------------------
+async function autoResize (options: {
+  sourceImage: Jimp
+  newSize: { width: number, height: number }
+  destination: string
+}) {
+  const { sourceImage, newSize, destination } = options
 
-export {
-  processImage
+  // Portrait mode targetting a landscape, apply some effect on the image
+  const sourceIsPortrait = sourceImage.getWidth() < sourceImage.getHeight()
+  const destIsPortraitOrSquare = newSize.width <= newSize.height
+
+  if (sourceIsPortrait && !destIsPortraitOrSquare) {
+    const baseImage = sourceImage.cloneQuiet().cover(newSize.width, newSize.height)
+                                              .color([ { apply: 'shade', params: [ 50 ] } ])
+
+    const topImage = sourceImage.cloneQuiet().contain(newSize.width, newSize.height)
+
+    return write(baseImage.blit(topImage, 0, 0), destination)
+  }
+
+  return write(sourceImage.cover(newSize.width, newSize.height), destination)
+}
+
+function write (image: Jimp, destination: string) {
+  return image.quality(80).writeAsync(destination)
+}
+
+function skipProcessing (options: {
+  sourceImage: Jimp
+  newSize: { width: number, height: number }
+  imageBytes: number
+  inputExt: string
+  outputExt: string
+}) {
+  const { sourceImage, newSize, imageBytes, inputExt, outputExt } = options
+  const { width, height } = newSize
+
+  if (sourceImage.getWidth() > width || sourceImage.getHeight() > height) return false
+  if (inputExt !== outputExt) return false
+
+  const kB = 1000
+
+  if (height >= 1000) return imageBytes <= 200 * kB
+  if (height >= 500) return imageBytes <= 100 * kB
+
+  return imageBytes <= 15 * kB
 }