From 3dc2411130bfe2a441be8f5107390c3ea826fb5b Mon Sep 17 00:00:00 2001 From: Dominik Jain Date: Tue, 13 Jan 2026 21:19:39 +0100 Subject: [PATCH] Extend ExportShapeTool to support the export of image fill content Add new tool parameter `mode` ("shape" or "fill") to support this Since the fill's format is not guaranteed to be PNG, include dependency `sharp` to handle image format conversion Because the export logic has become more complex, introduce PenpotUtils.exportImage utility function for minimal code to be sent to the plugin for execution Resolves #12 --- mcp-server/package-lock.json | 548 ++++++++++++++++++++++++ mcp-server/package.json | 3 +- mcp-server/src/ToolResponse.ts | 9 +- mcp-server/src/tools/ExportShapeTool.ts | 56 ++- penpot-plugin/src/PenpotUtils.ts | 43 +- 5 files changed, 645 insertions(+), 14 deletions(-) diff --git a/mcp-server/package-lock.json b/mcp-server/package-lock.json index dc8c4af..918eb95 100644 --- a/mcp-server/package-lock.json +++ 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"https://registry.npmjs.org/semver/-/semver-7.7.3.tgz", + "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q==", + "license": "ISC", + "bin": { + "semver": "bin/semver.js" + }, + "engines": { + "node": ">=10" + } + }, "node_modules/send": { "version": "1.2.1", "resolved": "https://registry.npmjs.org/send/-/send-1.2.1.tgz", @@ -2158,6 +2655,50 @@ "version": "1.2.0", "license": "ISC" }, + "node_modules/sharp": { + "version": "0.34.5", + "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.34.5.tgz", + "integrity": "sha512-Ou9I5Ft9WNcCbXrU9cMgPBcCK8LiwLqcbywW3t4oDV37n1pzpuNLsYiAV8eODnjbtQlSDwZ2cUEeQz4E54Hltg==", + "hasInstallScript": true, + "license": "Apache-2.0", + "dependencies": { + "@img/colour": "^1.0.0", + "detect-libc": "^2.1.2", + "semver": "^7.7.3" + }, + "engines": { + "node": "^18.17.0 || ^20.3.0 || >=21.0.0" + }, + "funding": { + "url": "https://opencollective.com/libvips" + }, + "optionalDependencies": { + "@img/sharp-darwin-arm64": "0.34.5", + "@img/sharp-darwin-x64": "0.34.5", + "@img/sharp-libvips-darwin-arm64": "1.2.4", + "@img/sharp-libvips-darwin-x64": "1.2.4", + "@img/sharp-libvips-linux-arm": "1.2.4", + "@img/sharp-libvips-linux-arm64": "1.2.4", + "@img/sharp-libvips-linux-ppc64": "1.2.4", + "@img/sharp-libvips-linux-riscv64": "1.2.4", + "@img/sharp-libvips-linux-s390x": "1.2.4", + "@img/sharp-libvips-linux-x64": "1.2.4", + "@img/sharp-libvips-linuxmusl-arm64": "1.2.4", + "@img/sharp-libvips-linuxmusl-x64": "1.2.4", + "@img/sharp-linux-arm": "0.34.5", + "@img/sharp-linux-arm64": "0.34.5", + "@img/sharp-linux-ppc64": "0.34.5", + "@img/sharp-linux-riscv64": "0.34.5", + "@img/sharp-linux-s390x": "0.34.5", + "@img/sharp-linux-x64": "0.34.5", + "@img/sharp-linuxmusl-arm64": "0.34.5", + "@img/sharp-linuxmusl-x64": "0.34.5", + "@img/sharp-wasm32": "0.34.5", + "@img/sharp-win32-arm64": "0.34.5", + "@img/sharp-win32-ia32": "0.34.5", + "@img/sharp-win32-x64": "0.34.5" + } + }, "node_modules/shebang-command": { "version": "2.0.0", "license": "MIT", @@ -2334,6 +2875,13 @@ } } }, + "node_modules/tslib": { + "version": "2.8.1", + "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz", + "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==", + "license": "0BSD", + "optional": true + }, "node_modules/type-is": { "version": "2.0.1", "resolved": "https://registry.npmjs.org/type-is/-/type-is-2.0.1.tgz", diff --git a/mcp-server/package.json b/mcp-server/package.json index afc5fb0..67905e2 100644 --- a/mcp-server/package.json +++ b/mcp-server/package.json @@ -5,7 +5,7 @@ "type": "module", "main": "dist/index.js", "scripts": { - "build": "esbuild src/index.ts --bundle --platform=node --target=node18 --format=esm --outfile=dist/index.js --external:@modelcontextprotocol/* --external:ws --external:express --external:class-transformer --external:class-validator --external:reflect-metadata --external:pino --external:pino-pretty --external:js-yaml && npm run copy-static", + "build": "esbuild src/index.ts --bundle --platform=node --target=node18 --format=esm --outfile=dist/index.js --external:@modelcontextprotocol/* --external:ws --external:express --external:class-transformer --external:class-validator --external:reflect-metadata --external:pino --external:pino-pretty --external:js-yaml --external:sharp && npm run copy-static", "copy-static": "node -e \"require('fs').cpSync('src/static', 'dist/static', { recursive: true })\"", "build:types": "tsc --emitDeclarationOnly --outDir dist", "build:full": "npm run build && npm run build:types", @@ -32,6 +32,7 @@ "pino": "^9.10.0", "pino-pretty": "^13.1.1", "reflect-metadata": "^0.1.13", + "sharp": "^0.34.5", "ws": "^8.18.0" }, "devDependencies": { diff --git a/mcp-server/src/ToolResponse.ts b/mcp-server/src/ToolResponse.ts index 2c31c12..6055f24 100644 --- a/mcp-server/src/ToolResponse.ts +++ b/mcp-server/src/ToolResponse.ts @@ -22,7 +22,7 @@ export class TextContent implements TextItem { } } -class ImageContent implements ImageItem { +export class ImageContent implements ImageItem { [x: string]: unknown; readonly type = "image" as const; @@ -36,7 +36,12 @@ class ImageContent implements ImageItem { ) {} /** - * @param data - PNG image data as Uint8Array or as object (from JSON conversion of Uint8Array) + * Utility function for ensuring a consistent Uint8Array representation of byte data. + * Input can be either a Uint8Array or an object (as obtained from JSON conversion of Uint8Array + * from the plugin). + * + * @param data - data as Uint8Array or as object (from JSON conversion of Uint8Array) + * @return data as Uint8Array */ public static byteData(data: Uint8Array | object): Uint8Array { if (typeof data === "object") { diff --git a/mcp-server/src/tools/ExportShapeTool.ts b/mcp-server/src/tools/ExportShapeTool.ts index 2cbddb5..d032b0b 100644 --- a/mcp-server/src/tools/ExportShapeTool.ts +++ b/mcp-server/src/tools/ExportShapeTool.ts @@ -1,10 +1,11 @@ import { z } from "zod"; import { Tool } from "../Tool"; -import { PNGImageContent, PNGResponse, TextContent, TextResponse, ToolResponse } from "../ToolResponse"; +import { ImageContent, PNGImageContent, PNGResponse, TextContent, TextResponse, ToolResponse } from "../ToolResponse"; import "reflect-metadata"; import { PenpotMcpServer } from "../PenpotMcpServer"; import { ExecuteCodePluginTask } from "../tasks/ExecuteCodePluginTask"; import { FileUtils } from "../utils/FileUtils"; +import sharp from "sharp"; /** * Arguments class for ExportShapeTool @@ -18,7 +19,14 @@ export class ExportShapeArgs { "Identifier of the shape to export. Use the special identifier 'selection' to " + "export the first shape currently selected by the user." ), - format: z.enum(["svg", "png"]).default("png").describe("The output format, either PNG (default) or SVG."), + format: z.enum(["svg", "png"]).default("png").describe("The output format, either 'png' (default) or 'svg'."), + mode: z + .enum(["shape", "fill"]) + .default("shape") + .describe( + "The export mode: either 'shape' (full shape as it appears in the design, including descendants; the default) or " + + "'fill' (export the raw image that is used as a fill for the shape; PNG format only)" + ), filePath: z .string() .optional() @@ -32,6 +40,8 @@ export class ExportShapeArgs { format: "svg" | "png" = "png"; + mode: "shape" | "fill" = "shape"; + filePath?: string; } @@ -60,9 +70,11 @@ export class ExportShapeTool extends Tool { public getToolDescription(): string { let description = - "Exports a shape from the Penpot design to a PNG or SVG image, " + - "such that you can get an impression of what the shape looks like."; - if (this.mcpServer.isFileSystemAccessEnabled()) description += "\nAlternatively, you can save it to a file."; + "Exports a shape (or a shape's image fill) from the Penpot design to a PNG or SVG image, " + + "such that you can get an impression of what it looks like. "; + if (this.mcpServer.isFileSystemAccessEnabled()) { + description += "\nAlternatively, you can save it to a file."; + } return description; } @@ -79,7 +91,8 @@ export class ExportShapeTool extends Tool { } else { shapeCode = `penpotUtils.findShapeById("${args.shapeId}")`; } - const code = `return ${shapeCode}.export({"type": "${args.format}"});`; + const asSvg = args.format === "svg"; + const code = `return penpotUtils.exportImage(${shapeCode}, "${args.mode}", ${asSvg});`; // execute the code and obtain the image data const task = new ExecuteCodePluginTask({ code: code }); @@ -90,22 +103,45 @@ export class ExportShapeTool extends Tool { if (!args.filePath) { // return image data directly (for the LLM to "see" it) if (args.format === "png") { - return new PNGResponse(imageData); + return new PNGResponse(await this.toPngImageBytes(imageData)); } else { return TextResponse.fromData(imageData); } } else { - // make sure file system access is enabled + // save to file requested: make sure file system access is enabled if (!this.mcpServer.isFileSystemAccessEnabled()) { throw new Error("File system access is not enabled on the MCP server!"); } - // save image to file + // save to file if (args.format === "png") { - FileUtils.writeBinaryFile(args.filePath, PNGImageContent.byteData(imageData)); + FileUtils.writeBinaryFile(args.filePath, await this.toPngImageBytes(imageData)); } else { FileUtils.writeTextFile(args.filePath, TextContent.textData(imageData)); } return new TextResponse(`The shape has been exported to ${args.filePath}`); } } + + /** + * Converts image data to PNG format if necessary. + * + * @param data - The original image data as Uint8Array or as object (from JSON conversion of Uint8Array) + * @return The image data as PNG bytes + */ + private async toPngImageBytes(data: Uint8Array | object): Promise { + const originalBytes = ImageContent.byteData(data); + + // use sharp to detect format and convert to PNG if necessary + const image = sharp(originalBytes); + const metadata = await image.metadata(); + + // if already PNG, return as-is to avoid unnecessary re-encoding + if (metadata.format === "png") { + return originalBytes; + } + + // convert to PNG + const pngBuffer = await image.png().toBuffer(); + return new Uint8Array(pngBuffer); + } } diff --git a/penpot-plugin/src/PenpotUtils.ts b/penpot-plugin/src/PenpotUtils.ts index f5627ee..656f574 100644 --- a/penpot-plugin/src/PenpotUtils.ts +++ b/penpot-plugin/src/PenpotUtils.ts @@ -1,4 +1,4 @@ -import { Page, Rectangle, Shape } from "@penpot/plugin-types"; +import { Fill, Page, Rectangle, Shape } from "@penpot/plugin-types"; export class PenpotUtils { /** @@ -252,4 +252,45 @@ export class PenpotUtils { return rect; } + + /** + * Exports the given shape (or its fill) to BASE64 image data. + * + * This function is used internally by the ExportImageTool in the MCP server. + * + * @param shape - The shape whose image data to export + * @param mode - Either "shape" (to export the entire shape, including descendants) or "fill" + * to export the shape's raw fill image data + * @param asSVG - Whether to export as SVG rather than as a pixel image (only supported for mode "shape") + * @returns A byte array containing the exported image data. + * - For mode="shape", it will be PNG or SVG data depending on the value of `asSVG`. + * - For mode="fill", it will be whatever format the fill image is stored in. + */ + public static async exportImage(shape: Shape, mode: "shape" | "fill", asSVG: boolean): Promise { + switch (mode) { + case "shape": + return shape.export({ type: asSVG ? "svg" : "png" }); + case "fill": + if (asSVG) { + throw new Error("Image fills cannot be exported as SVG"); + } + // check whether the shape has the `fills` member + if (!("fills" in shape)) { + throw new Error("Shape with `fills` member is required for fill export mode"); + } + // find first fill that has fillImage + const fills: Fill[] = (shape as any).fills; + for (const fill of fills) { + if (fill.fillImage) { + const imageData = fill.fillImage; + // TODO: fix ts-ignore once Penpot types are updated to include data() method + // @ts-ignore + return imageData.data(); + } + } + throw new Error("No fill with image data found in the shape"); + default: + throw new Error(`Unsupported export mode: ${mode}`); + } + } }