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PowerPoint Output

PPTX output is generated from a Go draw plan and written by the configured WASM/PptxGenJS exporter.

xaligo render diagram.xal --format pptx -o diagram.pptx \
  --services services.csv \
  --paper A3 --orientation landscape \
  --paper-margin-top 0.75 --paper-margin-bottom 0.75

Each identified child frame becomes one diagram slide in source order. Because PowerPoint presentations use one common slide size, xaligo uses the largest resolved frame-page width and height and centers smaller pages without scaling them independently. A document with one frame still produces one slide.

Use --combine-frames to preserve the former one-canvas, one-diagram-slide layout:

xaligo render diagram.xal --format pptx -o diagram.pptx --combine-frames

The page frame is a logical slide boundary and is not drawn as a visible rectangle. Its edge supplies each cross-frame side and frame-anchor tangent coordinate; the drawable stub terminal is on the parallel inward inset line. For a smaller frame centered on the common slide, that inset is measured from the logical frame edge before slide centering, not from the physical slide edge.

PPTX-specific behavior:

  • Paper fitting supports named paper sizes and per-side margins.
  • Routing avoids icon and label obstacles where possible.
  • Existing routed lanes influence later paths to reduce overlap.
  • Anchor backgrounds are drawn before lines, while icons and labels are drawn above lines.
  • Line-jump masks are drawn at interior crossings.
  • Legend slide(s) are added after all frame/diagram slides when --services is provided.
  • Cross-frame connections are page links: the source slide contains to <destination frame ID> and the destination slide contains from <source frame ID>. Endpoint and logical frame anchors can select different sides. The terminal inset is the resolved metadata row-gap, or 4 layout pixels without metadata; zero keeps the outer edge. The page-link label stays 4 layout pixels inward and at least 4 layout pixels along the edge from that final terminal.

The PPTX exporter should only translate the resolved draw plan into a presentation. Geometry and routing decisions belong on the Go side.