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SnapOtter
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- Create 53 per-tool VitePress documentation pages with accurate parameters from Zod schemas, example requests, and response formats - Add root llms.txt for LLM-friendly repo browsing - Fix OpenAPI spec: add auth and 422 error schemas to edit-metadata/inspect and strip-metadata/inspect sub-routes - Fix tool count inconsistency (52 -> 53) across landing site, e2e tests, and local docs - Rename color-adjustments.ts to adjust-colors.ts to match tool ID - Update VitePress sidebar with all 8 tool categories and top nav
59 lines
2.0 KiB
Markdown
59 lines
2.0 KiB
Markdown
---
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description: Overlay a logo or image as a watermark with configurable position, opacity, and scale.
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---
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# Image Watermark
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Overlay a logo or secondary image as a watermark on a base image. The watermark is scaled relative to the base image width and positioned at a corner or center.
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## API Endpoint
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`POST /api/v1/tools/watermark-image`
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Accepts multipart form data with **two** image files and a JSON `settings` field.
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## Parameters
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| position | string | No | `"bottom-right"` | Watermark placement: `center`, `top-left`, `top-right`, `bottom-left`, `bottom-right` |
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| opacity | number | No | `50` | Watermark opacity percentage (0 to 100) |
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| scale | number | No | `25` | Watermark width as percentage of main image width (1 to 100) |
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### File Fields
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| Field Name | Required | Description |
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|------------|----------|-------------|
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| file | Yes | The main/base image |
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| watermark | Yes | The watermark/logo image |
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## Example Request
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```bash
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curl -X POST http://localhost:1349/api/v1/tools/watermark-image \
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-H "Authorization: Bearer si_your-api-key" \
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-F "file=@photo.jpg" \
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-F "watermark=@logo.png" \
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-F 'settings={"position": "bottom-right", "opacity": 60, "scale": 20}'
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```
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## Example Response
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```json
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{
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"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
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"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/photo.jpg",
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"originalSize": 2450000,
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"processedSize": 2520000
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}
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```
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## Notes
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- Both images are validated and decoded (HEIC, RAW, PSD, SVG supported).
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- The watermark is resized proportionally so its width equals `scale`% of the main image width.
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- Opacity is applied via an alpha mask composited with `dest-in` blending.
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- Corner positions use a 20px padding from the image edge.
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- If the watermark image has transparency (e.g., a PNG logo), it is preserved during compositing.
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- EXIF orientation is auto-applied on both images before processing.
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