How to Generate Editable Multi-Layer Fabric.js Templates via REST API (Prisma V1.0 Tutorial)
Most image APIs give you a PNG. If your product needs designs that people keep editing, like retyping a headline, swapping a photo or translating a banner, a PNG is a dead end. This tutorial generates a complete design with Prisma V1.0 and gets it back as an editable multi-layer template you can load into Fabric.js. What comes back: canvas JSON in the legacy-fabric-v1 format, with live text…
Generating editable multi-layer Fabric.js templates via REST API requires using Prisma V1.0 and following a specific process. PNG images are not ideal for designs that need editing, such as retyping a headline or swapping a photo, as they are a dead end.
The API provides canvas JSON in the legacy-fabric-v1 format, which includes live text objects, native shapes, and image objects. It also offers private raster layers (PNG) and a JPEG preview, along with your own photos placed as separate image objects (up to five).
Before starting, you need a Prisma developer workspace, an API key with specific permissions, and Prisma Credits. The process involves submitting a generation request, polling the job, downloading the editable template, and loading it into Fabric.js. The API response includes a job ID, prompt, aspect ratio, material images, reference image, and idempotency key header.
When polling the job, handle rate limits and errors appropriately, and download the template files from the API on your backend server to ensure security. Load the template JSON into Fabric.js for users to edit the text, shapes, and photos as needed. Be aware of the limits and good habits, such as respecting the Retry-After header and handling errors effectively.
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