ausboss-ComfyUI-AusBoss/js/docs/AUSBOSS_NODES_LoadImagePad.md

Load Image + Pad

Loads an image and builds an outpaint canvas around it in one node. The canvas drawn on the node is the control: drag any edge of the dashed final rect to grow that side's padding — the whole edge is the handle, and corners grab the nearer edge. The second output is a mask covering exactly the padding, ready for an inpainter.

The widget card holds Source and Upload, Fill, Color or Backdrop, Feather, Multiple, and Budget. Exact padding opens a separate scrub row for each side. Every row can take a link; linked controls dim, and their values and links save with the workflow. The canvas remains available below the card for dragging the borders. Linked sides are controlled upstream; dragging their borders leaves the saved padding value unchanged.

The on-node canvas

• Each padded side shows its "+N px" count on the band; when the band is too thin to read, the label hops inside the image onto a pill. A side that Multiple trims shows "−N px" instead, with the cut-off strip of the image shaded.
• The badge in the corner is the truth: the final output size after the canvas-multiple and megapixel math, exactly what the width/height outputs will say.
• Reset padding appears in the top-right corner while there is padding to clear; it sets every side a link does not drive back to 0.
• Clicks on empty canvas space fall through, so the node still drags.
• The hidden pad_left/top/right/bottom widgets hold the real values — the canvas is their remote control, so undo, save/load, and the API format all see plain INT widgets.

Guarantees

• The original pixels land bit-identical at their position (resized only when a megapixel target is set — and then resized before padding, so the mask seam stays one crisp pixel wide).
• No strip is ever added along edges you did not pad; see Multiple.
• The mask is 1.0 over every padded pixel and 0.0 over the source, ramped only where feather says so.

Controls

• Source (image): Choose or upload from ComfyUI's input folder; the list previews the image under the pointer and filters as you type.
• source_image (optional socket): Wire an image from another node here and it is padded instead of the file; the Source row dims while the wire is connected. The canvas can only show a wired picture after a run, so it draws an outline until then, and afterwards the last image it padded at its true size. The padding applies to every image that arrives, so a loader that feeds one image per run pads a whole folder the same way.
• Fill / Color / Backdrop (mode / fill_color / backdrop_blur): Five fills — color, edge, edge pixel, pillarbox blur, mirror. Color shows for color, Backdrop for pillarbox blur. mirror reflects the picture outward at every edge (the edge pixel included, and on past the picture's own size), so the padding reads as more of the scene: the margin to give an edit model room to drift, with the stitcher wired into Realign to Source 🆎. On Qwen Image 2.1 restyles, a mirror margin tempted the model to zoom in and fill the canvas far less often than edge-pixel or flat gray padding.
• Feather (feather): Ramps the mask inward across the image edge on each padded side (ramp width capped by the image size), so the sampler blends the seam. 0 keeps the seam hard. The padding itself always stays solid.
• Multiple (canvas_multiple, starts at 8; 1 keeps every pixel): The final canvas rounds to this multiple. The extra pixels join a side you padded (the right or bottom one when you padded both). If you padded neither left nor right, or neither top nor bottom, nothing is added there: a strip along an edge you left alone would be one more edge for the model to paint, and a thin one comes out flat and off-tone. With a Budget the source is scaled to fit instead, keeping its shape (with no padding at all, each side snaps on its own); without one it loses those few pixels, evenly from both edges, and the rest stays bit-identical.
• Budget (target_megapixels): 0 = off. Rescales the source so the padded canvas lands on this many megapixels, then re-rounds to the multiple — the way to outpaint a small or huge image at a sampler-friendly size.

Outputs

• image: The padded canvas.
• mask: The outpaint mask (white = padding, feathered per feather).
• width / height: The final canvas size — the badge's numbers as INTs, for wiring into latent nodes.
• stitcher: Hand to Stitch Inpaint 🆎 with the sampled result to keep only the new padding and restore the original pixels bit-identically — whatever the sampler did inside the source area is discarded. It also records where the source sits on the canvas, which Krea 2 Outpaint Model Patch 🆎 reads to place the reference and Realign to Source 🆎 reads to return just the picture's area of an edit made on the padded canvas.
• reference: The source alone, no padding, fitted to a small multiple of 16 — the reference image for Krea 2 Encode 🆎 and other reference conditioning. It is built on every run; leave it unconnected when nothing needs it.