docs: organize tool pages by modality under /tools/<modality>/

Move all 157 tool pages into image/video/audio/pdf/data subfolders so URLs read /tools/<modality>/<id> (e.g. /tools/image/crop). Nest the image sub-categories under an Image group in the sidebar so the nav reads by modality. Add public/_redirects (301, clean + .html forms) mapping every old flat /tools/<id> URL to its new path so inbound links keep working. Rewrite all internal /tools links. Verified with a clean docs build (no dead links).
2026-08-03 07:46:42 +02:00 · 2026-06-18 14:12:28 +08:00
parent 03c1a5e36f
commit d24e244af4
162 changed files with 874 additions and 554 deletions
@@ -0,0 +1,58 @@
+---
+description: Overlay a logo or image as a watermark with configurable position, opacity, and scale.
+---
+
+# Image Watermark
+
+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.
+
+## API Endpoint
+
+`POST /api/v1/tools/image/watermark-image`
+
+Accepts multipart form data with **two** image files and a JSON `settings` field.
+
+## Parameters
+
+| Parameter | Type | Required | Default | Description |
+|-----------|------|----------|---------|-------------|
+| position | string | No | `"bottom-right"` | Watermark placement: `center`, `top-left`, `top-right`, `bottom-left`, `bottom-right` |
+| opacity | number | No | `50` | Watermark opacity percentage (0 to 100) |
+| scale | number | No | `25` | Watermark width as percentage of main image width (1 to 100) |
+
+### File Fields
+
+| Field Name | Required | Description |
+|------------|----------|-------------|
+| file | Yes | The main/base image |
+| watermark | Yes | The watermark/logo image |
+
+## Example Request
+
+```bash
+curl -X POST http://localhost:1349/api/v1/tools/image/watermark-image \
+  -H "Authorization: Bearer si_your-api-key" \
+  -F "file=@photo.jpg" \
+  -F "watermark=@logo.png" \
+  -F 'settings={"position": "bottom-right", "opacity": 60, "scale": 20}'
+```
+
+## Example Response
+
+```json
+{
+  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
+  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/photo.jpg",
+  "originalSize": 2450000,
+  "processedSize": 2520000
+}
+```
+
+## Notes
+
+- Both images are validated and decoded (HEIC, RAW, PSD, SVG supported).
+- The watermark is resized proportionally so its width equals `scale`% of the main image width.
+- Opacity is applied via an alpha mask composited with `dest-in` blending.
+- Corner positions use a 20px padding from the image edge.
+- If the watermark image has transparency (e.g., a PNG logo), it is preserved during compositing.
+- EXIF orientation is auto-applied on both images before processing.