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chalk from 'chalk';\nimport mime from 'mime';\n\nimport * as Cache from './Cache';\nimport * as Download from './Download';\nimport * as Ico from './Ico';\nimport { ImageOptions } from './Image.types';\nimport * as Jimp from './jimp';\nimport * as Sharp from './sharp';\n\nconst supportedMimeTypes = ['image/png', 'image/jpeg', 'image/webp', 'image/gif'];\n\nlet hasWarned: boolean = false;\n\nasync function resizeImagesAsync(buffer: Buffer, sizes: number[]): Promise<Buffer[]> {\n const sharp = await getSharpAsync();\n if (!sharp) {\n return Jimp.resizeBufferAsync(buffer, sizes);\n }\n return Sharp.resizeBufferAsync(buffer, sizes);\n}\n\nasync function resizeAsync(imageOptions: ImageOptions): Promise<Buffer> {\n const sharp: any = await getSharpAsync();\n const { width, height, backgroundColor, resizeMode } = imageOptions;\n if (!sharp) {\n const inputOptions: any = { input: imageOptions.src, quality: 100 };\n const jimp = await Jimp.resize(inputOptions, {\n width,\n height,\n fit: resizeMode,\n background: backgroundColor,\n });\n\n if (imageOptions.removeTransparency) {\n jimp.colorType(2);\n }\n if (imageOptions.borderRadius) {\n // TODO: support setting border radius with Jimp. Currently only support making the image a circle\n await Jimp.circleAsync(jimp);\n }\n\n const imgBuffer = await jimp.getBufferAsync(jimp.getMIME());\n return imgBuffer;\n }\n try {\n let sharpBuffer = sharp(imageOptions.src)\n .ensureAlpha()\n .resize(width, height, { fit: resizeMode, background: 'transparent' });\n\n // Skip an extra step if the background is explicitly transparent.\n if (backgroundColor && backgroundColor !== 'transparent') {\n // Add the background color to the image\n sharpBuffer = sharpBuffer.composite([\n {\n // create a background color\n input: {\n create: {\n width,\n height,\n // allow alpha colors\n channels: imageOptions.removeTransparency ? 3 : 4,\n background: backgroundColor,\n },\n },\n // dest-over makes the first image (input) appear on top of the created image (background color)\n blend: 'dest-over',\n },\n ]);\n } else if (imageOptions.removeTransparency) {\n sharpBuffer.flatten();\n }\n\n if (imageOptions.borderRadius) {\n const mask = Buffer.from(\n `<svg><rect x=\"0\" y=\"0\" width=\"${width}\" height=\"${height}\" \n rx=\"${imageOptions.borderRadius}\" ry=\"${imageOptions.borderRadius}\" \n fill=\"${\n backgroundColor && backgroundColor !== 'transparent' ? backgroundColor : 'none'\n }\" /></svg>`\n );\n sharpBuffer.composite([{ input: mask, blend: 'dest-over' }]);\n }\n\n return await sharpBuffer.png().toBuffer();\n } catch ({ message }) {\n throw new Error(\n `It was not possible to generate splash screen '${imageOptions.src}'. ${message}`\n );\n }\n}\n\nasync function getSharpAsync(): Promise<any> {\n let sharp: any;\n if (await Sharp.isAvailableAsync()) sharp = await Sharp.findSharpInstanceAsync();\n return sharp;\n}\n\nfunction getDimensionsId(imageOptions: Pick<ImageOptions, 'width' | 'height'>): string {\n return imageOptions.width === imageOptions.height\n ? `${imageOptions.width}`\n : `${imageOptions.width}x${imageOptions.height}`;\n}\n\nasync function maybeWarnAboutInstallingSharpAsync() {\n // Putting the warning here will prevent the warning from showing if all images were reused from the cache\n if (!hasWarned && !(await Sharp.isAvailableAsync())) {\n hasWarned = true;\n console.warn(\n chalk.yellow(\n `Using node to generate images. This is much slower than using native packages.\\n\\u203A Optionally you can stop the process and try again after successfully running \\`npm install -g sharp-cli\\`.\\n`\n )\n );\n }\n}\n\nasync function ensureImageOptionsAsync(imageOptions: ImageOptions): Promise<ImageOptions> {\n const icon = {\n ...imageOptions,\n src: await Download.downloadOrUseCachedImage(imageOptions.src),\n };\n\n // Default to contain\n if (!icon.resizeMode) {\n icon.resizeMode = 'contain';\n }\n\n const mimeType = mime.getType(icon.src);\n\n if (!mimeType) {\n throw new Error(`Invalid mimeType for image with source: ${icon.src}`);\n }\n if (!supportedMimeTypes.includes(mimeType)) {\n throw new Error(`Supplied image is not a supported image type: ${imageOptions.src}`);\n }\n\n if (!icon.name) {\n icon.name = `icon_${getDimensionsId(imageOptions)}.${mime.getExtension(mimeType)}`;\n }\n\n return icon;\n}\n\nexport async function generateImageAsync(\n options: { projectRoot: string; cacheType?: string },\n imageOptions: ImageOptions\n): Promise<{ source: Buffer; name: string }> {\n const icon = await ensureImageOptionsAsync(imageOptions);\n\n if (!options.cacheType) {\n await maybeWarnAboutInstallingSharpAsync();\n return { name: icon.name!, source: await resizeAsync(icon) };\n }\n\n const cacheKey = await Cache.createCacheKeyWithDirectoryAsync(\n options.projectRoot,\n options.cacheType,\n icon\n );\n\n const name = icon.name!;\n let source: Buffer | null = await Cache.getImageFromCacheAsync(name, cacheKey);\n\n if (!source) {\n await maybeWarnAboutInstallingSharpAsync();\n source = await resizeAsync(icon);\n await Cache.cacheImageAsync(name, source, cacheKey);\n }\n\n return { name, source };\n}\n\nexport async function generateFaviconAsync(\n pngImageBuffer: Buffer,\n sizes: number[] = [16, 32, 48]\n): Promise<Buffer> {\n const buffers = await resizeImagesAsync(pngImageBuffer, sizes);\n return await Ico.generateAsync(buffers);\n}\n\n/**\n * Layers the provided foreground image over the provided background image.\n *\n * @param foregroundImageBuffer\n * @param foregroundImageBuffer\n * @param x pixel offset from the left edge, defaults to 0.\n * @param y pixel offset from the top edge, defaults to 0.\n */\nexport async function compositeImagesAsync({\n foreground,\n background,\n x = 0,\n y = 0,\n}: {\n foreground: Buffer;\n background: Buffer;\n x?: number;\n y?: number;\n}): Promise<Buffer> {\n const sharp: any = await getSharpAsync();\n if (!sharp) {\n const image = (await Jimp.getJimpImageAsync(background)).composite(\n await Jimp.getJimpImageAsync(foreground),\n x,\n y\n );\n return await image.getBufferAsync(image.getMIME());\n }\n return await sharp(background)\n .composite([{ input: foreground, left: x, top: y }])\n .toBuffer();\n}\n"]} |