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Two jobs, one repack pass. BRANDING. Every ISO now carries a Felhom boot screen built from the website's og-image_2.png at repack time (ImageMagick in the assistant container), so the boot card has ONE source and not a second pre-rendered copy in the repo to drift. The card is scaled onto a 1024x768 gfxterm canvas, top-centered, and the card's own subtle background grid is continued across the letterbox fill PHASE-LOCKED to where the card's grid lands — the fill is seamless rather than a square of grid floating in flat navy. Menu positioning needs a gfxmenu theme (plain background_image cannot move the menu off the wordmark), so the stock pvetheme is replaced by felhomtheme, which puts the menu in the lower third the layout deliberately leaves empty. SAFETY — the half that matters. The stock PVE menu offers Graphical, Terminal UI and serial installers plus an Advanced Options submenu (nomodeset x2, three debug variants, Rescue Boot, memtest, UEFI settings). Every one of them reaches the MANUAL installer, whose first question is which disk to wipe. A customer, or their helpful nephew, must not be able to get there from a boot menu. They are not hidden and not password-gated: they are NOT EMITTED. What ships is one entry, 'Felhom telepítés', default, 5s. Boot behavior is unchanged. The kernel/append and initrd lines are lifted VERBATIM from the ISO's own 'Install Proxmox VE (Automated)' entry rather than frozen into a copy here, so a PVE bump tracks automatically; the build fails if they cannot be found, if the append line has lost proxmox-start-auto-installer, or if auto-installer-mode.toml is absent (which would mean the one Felhom- labelled entry boots a manual installer). The rendered menu is then gated for exactly 1 entry, 0 submenus, and zero references to proxtui/proxdebug/nomodeset/ Rescue Boot/memtest/fwsetup — and re-verified by reading the menu back OUT of the finished ISO, not merely out of the extract tree. mkimage-surgery.sh -> iso-repack.sh: branding and the slice-B loader swap need the same extract -> modify -> re-master cycle, so they share one pass instead of re-mastering twice. The mkimage recipe is untouched. The embedded module list is still derived from the STOCK grub.cfg (snapshotted before branding rewrites it), plus gfxmenu's bitmap/bitmap_scale/trig renderer deps. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Nn3VgQk9iwEGgyx6QJ2NvE
97 lines
5.3 KiB
Bash
97 lines
5.3 KiB
Bash
#!/bin/bash
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#===============================================================================
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# generate-grub-background.sh — build the Felhom GRUB boot background (scripts v1.22.0, R-38).
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#
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# Turns Viktor's square brand card (website/assets/og-image_2.png, 1017x1016) into a GRUB-friendly
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# 1024x768 PNG. Runs INSIDE the felhom-iso-assistant container (needs ImageMagick); called by
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# iso-repack.sh.
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#
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# THE LAYOUT, AND WHY:
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#
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# * 1024x768 canvas — gfxterm-safe. The stock PVE grub.cfg already asks for `gfxmode=1024x768`, so
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# this is the mode the ISO's GRUB is known to get on real firmware. Anything larger risks a
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# fallback to 800x600 and a scaled/cropped background.
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#
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# * The card is scaled to 500x500 and composited TOP-CENTERED (y=16). That deliberately leaves the
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# bottom ~250px empty: it is where felhom-theme.txt positions the boot menu (top=70%) and the
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# countdown label (top=84%). Menu text therefore never lands on the cloud/wordmark/tagline. If
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# you change CARD or CARD_Y here, move `boot_menu.top` in felhom-theme.txt to match.
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#
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# * THE GRID. The card carries a subtle background grid (4px lines of #0D131A on #0D1117, every
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# 131px) and Viktor asked for it to stay visible. Two things could destroy it: the downscale
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# (handled — at 500/1017 the lines land at ~2px, still legible), and the letterbox fill. A flat
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# navy fill would leave an obvious 500px square of grid floating in a plain field.
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#
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# So the grid is drawn across the WHOLE canvas first, PHASE-LOCKED to where the card's own grid
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# will land, in the card's own line color — then the card is composited on top. Inside the card
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# region the card's real grid shows; outside, the drawn continuation lines up exactly. The seam
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# is invisible because the card's background (#0D1117) is also the canvas fill.
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#
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# The phase-lock math: source line centers are x=81.5+n*131, y=21.5+n*131 (measured, not guessed
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# — sampled from og-image_2.png). Scale s=CARD/SRC_W maps them onto the canvas, offset by the
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# card's origin. Line width scales the same way.
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#
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# Usage: generate-grub-background.sh <source.png> <out.png>
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#===============================================================================
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set -euo pipefail
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SRC="${1:?source card PNG required}"
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OUT="${2:?output PNG path required}"
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# --- canvas ---------------------------------------------------------------------------------------
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CW=1024; CH=768
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BG="#0D1117" # the card's own background — the letterbox must be seamless, not merely "navy"
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GRID="#0D131A" # the card's own grid line color (sampled)
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# --- card placement (keep in sync with felhom-theme.txt boot_menu.top) ------------------------------
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CARD=500; CARD_X=262; CARD_Y=16
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# --- measured properties of og-image_2.png ----------------------------------------------------------
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SRC_W=1017 # source width; the card is square (1017x1016)
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PITCH=131 # grid pitch in source px
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V0=81.5 # center of the first vertical grid line, source px
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H0=21.5 # center of the first horizontal grid line, source px
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LINE=4 # grid line width in source px
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command -v magick >/dev/null && IM=magick || IM=convert
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[[ -f "$SRC" ]] || { echo "generate-grub-background: source card not found: $SRC" >&2; exit 2; }
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# Refuse a source whose geometry no longer matches the measured constants above — a silently swapped
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# asset would misplace every grid line, and the result only shows up on a boot screen nobody re-checks.
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GEOM="$($IM identify -format '%wx%h' "$SRC")"
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[[ "$GEOM" == "1017x1016" ]] || {
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echo "generate-grub-background: source card is ${GEOM}, expected 1017x1016." >&2
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echo " The grid phase-lock constants (PITCH/V0/H0/LINE) were measured against that geometry." >&2
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echo " Re-measure them for the new asset before changing this check." >&2
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exit 3
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}
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S=$(awk -v c="$CARD" -v w="$SRC_W" 'BEGIN{printf "%.6f", c/w}') # card scale factor
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P=$(awk -v p="$PITCH" -v s="$S" 'BEGIN{printf "%.4f", p*s}') # canvas grid pitch
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LW=$(awk -v l="$LINE" -v s="$S" 'BEGIN{printf "%.2f", l*s}') # canvas grid line width
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# Walk n outward far enough to cover the canvas in both axes from the card-anchored origin.
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draw=""
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for n in $(seq -20 40); do
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x=$(awk -v a="$CARD_X" -v v="$V0" -v s="$S" -v p="$P" -v n="$n" 'BEGIN{printf "%.2f", a+v*s+n*p}')
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if awk -v x="$x" -v w="$CW" 'BEGIN{exit !(x>-2 && x<w+2)}'; then
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draw="$draw line $x,0 $x,$CH"
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fi
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y=$(awk -v a="$CARD_Y" -v v="$H0" -v s="$S" -v p="$P" -v n="$n" 'BEGIN{printf "%.2f", a+v*s+n*p}')
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if awk -v y="$y" -v h="$CH" 'BEGIN{exit !(y>-2 && y<h+2)}'; then
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draw="$draw line 0,$y $CW,$y"
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fi
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done
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[[ -n "$draw" ]] || { echo "generate-grub-background: grid draw list came out empty" >&2; exit 4; }
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# PNG24 (no palette, no alpha): GRUB's png module reads plain 8-bit RGB reliably; an indexed or
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# 16-bit PNG is where "the background silently doesn't render" comes from.
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$IM -size "${CW}x${CH}" xc:"$BG" \
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-stroke "$GRID" -strokewidth "$LW" -draw "$draw" -stroke none \
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\( "$SRC" -resize "${CARD}x${CARD}!" \) -geometry "+${CARD_X}+${CARD_Y}" -composite \
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-depth 8 "PNG24:$OUT"
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[[ -s "$OUT" ]] || { echo "generate-grub-background: produced no output" >&2; exit 5; }
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OGEOM="$($IM identify -format '%wx%h %[channels] %[depth]' "$OUT")"
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echo "generate-grub-background: $OUT ($OGEOM, $(stat -c%s "$OUT") bytes)"
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