-
Notifications
You must be signed in to change notification settings - Fork 22
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
2743a60
commit 156f628
Showing
3 changed files
with
185 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| import type { NextApiRequest, NextApiResponse } from 'next'; | ||
|
|
||
| import { createCanvas, registerFont, CanvasRenderingContext2D } from 'canvas'; | ||
| import sharp from 'sharp'; | ||
|
|
||
| function wrapText( | ||
| context: CanvasRenderingContext2D, | ||
| text: string, | ||
| maxWidth: number, | ||
| ) { | ||
| const words = text.split(' '); | ||
| let lines: string[] = []; | ||
| let currentLine: string = words[0]; | ||
|
|
||
| for (let i = 1; i < words.length; i++) { | ||
| let word = words[i]; | ||
| let width = context.measureText(currentLine + ' ' + word).width; | ||
| if (width < maxWidth) { | ||
| currentLine += ' ' + word; | ||
| } else { | ||
| lines.push(currentLine); | ||
| currentLine = word; | ||
| } | ||
| } | ||
| lines.push(currentLine); // Push the last line | ||
| return lines; | ||
| } | ||
|
|
||
| function cutAndAddEllipsis(text: string, maxWidth: number = 125) { | ||
| if (text.length <= maxWidth) { | ||
| return text; | ||
| } | ||
|
|
||
| return text.substring(0, maxWidth) + '...'; | ||
| } | ||
|
|
||
| export default async function handler( | ||
| req: NextApiRequest, | ||
| res: NextApiResponse, | ||
| ) { | ||
| // If there are missing parameters, return an error response | ||
| if (req.query.text == null || req.query.text == undefined) { | ||
| return res.status(400).json({ | ||
| status: 'error', | ||
| message: `Missing required query parameters: 'text'`, | ||
| }); | ||
| } | ||
|
|
||
| // Ensure text is a string | ||
| const requestText = req.query.text; | ||
| if (typeof requestText !== 'string') { | ||
| return res.status(400).json({ | ||
| status: 'error', | ||
| message: `Invalid type for 'text'. Expected a string.`, | ||
| }); | ||
| } | ||
|
|
||
| try { | ||
| // Cut the text if needed and add an ellipsis | ||
| const text = cutAndAddEllipsis(requestText); | ||
| const fontSize = 48; | ||
|
|
||
| // Load the original image to get its dimensions | ||
| const originalImage = await sharp( | ||
| 'https://raw.githubusercontent.com/agustinustheo/sharp-canvas-ts/main/template.jpg', | ||
| ).metadata(); | ||
|
|
||
| // Create a canvas that matches the original image's dimensions | ||
| const canvas = createCanvas(originalImage.width!, originalImage.height!); | ||
| const context = canvas.getContext('2d'); | ||
|
|
||
| // Optional: Register a custom font | ||
| context.font = `${fontSize}px sans-serif`; | ||
| context.fillStyle = 'black'; // Text color | ||
| context.textAlign = 'left'; | ||
| context.textBaseline = 'top'; | ||
|
|
||
| const maxWidth = originalImage.width! * 0.8; // Max width for the text | ||
| const lineHeight = fontSize * 1.2; // Line height | ||
| const lines = wrapText(context, text, maxWidth); | ||
| const textHeight = lines.length * lineHeight; // Calculate the total height of the text block | ||
|
|
||
| // Calculate the starting Y position to center the text block | ||
| const startY = (originalImage.height! - textHeight) / 2; | ||
|
|
||
| // Draw each line of text | ||
| lines.forEach((line, i) => { | ||
| const x = (originalImage.width! - context.measureText(line).width) / 2; // Center each line | ||
| const y = startY + i * lineHeight; | ||
| context.fillText(line, x, y); | ||
| }); | ||
|
|
||
| // Convert the canvas to a Buffer | ||
| const textBuffer = canvas.toBuffer(); | ||
|
|
||
| // Overlay the text image on the original image | ||
| const imageBuffer = await sharp( | ||
| 'https://raw.githubusercontent.com/agustinustheo/sharp-canvas-ts/main/template.jpg', | ||
| ) | ||
| .composite([{ input: textBuffer, blend: 'over' }]) | ||
| .png() | ||
| .toBuffer(); | ||
|
|
||
| res.setHeader('Content-Type', 'image/png'); | ||
| res.send(imageBuffer); | ||
| } catch (error) { | ||
| console.error('Error:', error); | ||
| res.status(500).json({ status: 'error', message: 'Internal server error' }); | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters