macOS DMG: branded window background and icon layout
The DMG opened as a plain Finder window. It now shows the app icon's figure on the CADCraft colour, with CADCraft.app and the Applications link side by side. Same approach as PhotoCraft's and VectorCraft's (storytold/photocraft#1201, storytold/vectorcraft#493). - packaging/macos/dmg/: background.svg (source; text outlined, no paper grain, the figure an <image> of assets/app-icon), background.tiff (1x + 2x HiDPI, 16-colour palette, Deflate, sRGB; ~21 KB) and dmg-layout.DS_Store (Finder view settings: window, icon size 128, positions, background). - generate.py writes the TIFF and the layout on any OS, byte-for-byte reproducible, with nothing from the machine that ran it (no paths, users, disk names or volume UUIDs). - package.sh copies them into the staging folder; the image is still built with hdiutil makehybrid. Nothing extra runs in the signing job. - The volume name drops the version: the layout finds the background through an alias that includes the volume name. The DMG file name keeps the version. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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@@ -37,6 +37,8 @@ Generated-in-code assets are original and have no file to list:
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| `assets/app-icon/cadcraft-256.png` | CADCraft contributors | generated | MIT OR Apache-2.0 | |
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| `assets/app-icon/cadcraft-1024.png` | CADCraft contributors | generated | MIT OR Apache-2.0 | |
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| `assets/app-icon/cadcraft-macos-512.png` | CADCraft contributors | generated (macOS margin variant) | MIT OR Apache-2.0 | |
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| `packaging/macos/dmg/background.svg` | @XusBadia | original work for this repository (2026-10-08), "CADCraft macOS DMG window background"; derived from the CADCraft app icon (`assets/app-icon/`, referenced via `<image>`, not copied); text is outlined Inter / JetBrains Mono glyph paths (OFL fonts the project already uses); no third-party material modified | MIT OR Apache-2.0 (same as the code: `LICENSE-MIT`, `LICENSE-APACHE`) | Finder window background of the macOS DMG; `packaging/macos/dmg/generate.py` renders it to `background.tiff` (see `packaging/macos/dmg/README.md`) |
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| `packaging/macos/dmg/background.tiff` | @XusBadia | Rendered from `packaging/macos/dmg/background.svg` by `packaging/macos/dmg/generate.py` | MIT OR Apache-2.0 (same as the code: `LICENSE-MIT`, `LICENSE-APACHE`) | 1x + 2x HiDPI TIFF for the macOS DMG window; includes the app icon (see its row) and LittleCMS's built-in sRGB profile ("No copyright, use freely") |
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| `examples/apartment.dxf` | CADCraft contributors | sample drawing made with cadcraft-cli commands | MIT OR Apache-2.0 | Original |
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| `docs/images/ui-apartment.png` | CADCraft contributors | screenshot of CADCraft itself (examples/apartment.dxf) | MIT OR Apache-2.0 | Original; no Autodesk UI |
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| `docs/images/ui-layout.png` | CADCraft contributors | screenshot of CADCraft itself (a layout of examples/apartment.dxf) | MIT OR Apache-2.0 | Original; no Autodesk UI |
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@@ -0,0 +1,44 @@
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# macOS DMG window
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What Finder shows when the DMG opens: a 660 × 400 pt background with the app icon and the
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`Applications` link side by side. `package.sh` copies these files into the image; nothing here is
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generated at build time, so the DMG still builds with `hdiutil makehybrid` (no mounted device, no
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Finder scripting on CI, nothing extra installed in the signing job).
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| File | What |
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|---|---|
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| `background.svg` | Source of the background: the app icon (`assets/app-icon/cadcraft-1024.png`, linked, not copied) cropped as a cover on the CADCraft colour field (`#14a3c7`), Ink and Paper. Its text (Inter, JetBrains Mono) is outlined, so rendering it needs no fonts. No paper grain: noise doesn't compress, and this keeps `background.tiff` small. |
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| `background.tiff` | The background at 1x (660 × 400 px, 72 dpi) and 2x (1320 × 800 px, 144 dpi) in one HiDPI TIFF (16-colour palette, Deflate, sRGB). Goes to `.background/background.tiff`. |
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| `dmg-layout.DS_Store` | Finder's view settings for the volume: window size, icon size 128, CADCraft.app at (326, 205), `Applications` at (574, 205), and the background. Goes to `.DS_Store` in the image; named so it isn't mistaken for (or ignored like) a Finder-generated `.DS_Store`. |
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| `generate.py` | Writes `background.tiff` and `dmg-layout.DS_Store` from the SVG and the layout above. |
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## The volume name has no version
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The mounted volume is called `CADCraft`, not `CADCraft <version>`. The layout points at the background
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through an alias that includes the volume name, and Finder resolves it by that name: with a
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versioned name the window keeps its size and icon positions but shows no background (tested).
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The DMG file name (`cadcraft-<version>-macos-<arch>.dmg`) still carries the version.
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## Rules
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- **Finder draws the icon labels in black in light and dark mode** when a window has a background,
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so the area under both icons stays light (Paper).
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- **Nothing goes inside the icon boxes:** artwork keeps 10 pt clear of each 128 pt icon box and of
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the label strip under it.
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## Regenerate
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Edit `background.svg` (or the layout constants in `generate.py`), then run, on any OS:
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```sh
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pip install 'pillow>=12' ds_store==1.3.3 mac_alias==2.2.3
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python3 packaging/macos/dmg/generate.py # needs resvg on PATH
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```
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Both outputs are byte-for-byte reproducible and carry nothing from the machine that ran it: the
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SVG renders without any fonts, and `dmg-layout.DS_Store` is written from scratch, its background
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alias holding only the volume name and `/.background/background.tiff`. If you add text to the SVG,
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outline it (`usvg` from resvg converts text to paths). The window is 660 × 432 with Finder's 32 pt
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title bar; the content area is 660 × 400.
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This follows VectorCraft's `packaging/macos/dmg/` (storytold/vectorcraft#493).
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@@ -0,0 +1,34 @@
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<defs><clipPath id="panel"><rect width="232" height="400"/></clipPath><pattern id="hatch" width="2.6" height="2.6" patternUnits="userSpaceOnUse" patternTransform="rotate(-38)">
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<rect width="2.6" height="1.05" fill="#0b0b0c"/></pattern><filter id="grain" x="0" y="0" width="100%" height="100%">
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<feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="2" seed="7"/>
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<feColorMatrix values="0 0 0 0 0.04 0 0 0 0 0.04 0 0 0 0 0.05 0.5 0 0 0 -0.225"/>
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</filter></defs>
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<rect width="660" height="400" fill="#efe9dc"/>
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<g clip-path="url(#panel)"><rect width="232" height="400" fill="#14a3c7"/><g transform="translate(-49.6,5.6) scale(0.72)"><image href="../../../assets/app-icon/cadcraft-1024.png" width="512" height="512"/></g></g>
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<line x1="236.5" y1="0" x2="236.5" y2="400" stroke="#0b0b0c" stroke-width="0.5"/>
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|
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</g>
|
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<g>
|
||||
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342.51587 35Line truncated
|
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</g>
|
||||
</g>
|
||||
</svg>
|
||||
|
After Width: | Height: | Size: 40 KiB |
Binary file not shown.
Binary file not shown.
@@ -0,0 +1,158 @@
|
||||
#!/usr/bin/env python3
|
||||
"""Regenerate background.tiff and dmg-layout.DS_Store for the macOS DMG window (see README.md here).
|
||||
|
||||
Needs resvg on PATH and:
|
||||
pip install 'pillow>=12' ds_store==1.3.3 mac_alias==2.2.3
|
||||
|
||||
Runs on any OS, no Mac needed. Both outputs come from this script alone, so they carry nothing
|
||||
from the machine that made them: no local paths, user or disk names, dates or volume UUIDs.
|
||||
|
||||
python3 packaging/macos/dmg/generate.py
|
||||
"""
|
||||
|
||||
import datetime
|
||||
import os
|
||||
import shutil
|
||||
import subprocess
|
||||
import sys
|
||||
import tempfile
|
||||
|
||||
from ds_store import DSStore
|
||||
from mac_alias import Alias, TargetInfo, VolumeInfo
|
||||
from PIL import Image, ImageCms
|
||||
|
||||
HERE = os.path.dirname(os.path.abspath(__file__))
|
||||
|
||||
# Keep in sync with package.sh (volume name) and README.md (layout).
|
||||
VOLUME = "CADCraft"
|
||||
WIDTH, HEIGHT = 660, 400 # window content, pt; the background's 1x size
|
||||
TITLE_BAR = 32
|
||||
ICON_SIZE = 128
|
||||
PALETTE = 16 # colours in background.tiff
|
||||
ICONS = {"CADCraft.app": (326, 205), "Applications": (574, 205)}
|
||||
# A fixed date for the alias and the colour profile. Finder never matches it against the image
|
||||
# (each build is a new volume): it finds the background by volume name and path.
|
||||
FIXED_DATE = datetime.datetime(2026, 10, 8, tzinfo=datetime.timezone.utc)
|
||||
|
||||
|
||||
def render(svg, width, out):
|
||||
# The SVG's text is already outlined and no fonts are loaded, so every machine draws the
|
||||
# same pixels.
|
||||
subprocess.run(
|
||||
["resvg", "--skip-system-fonts", "-w", str(width), svg, out],
|
||||
check=True,
|
||||
)
|
||||
with Image.open(out) as im:
|
||||
return im.convert("RGB")
|
||||
|
||||
|
||||
def quantize(im):
|
||||
# No dithering: dither noise compresses badly and the artwork has flat fills.
|
||||
return im.quantize(PALETTE, method=Image.Quantize.FASTOCTREE, dither=Image.Dither.NONE)
|
||||
|
||||
|
||||
def srgb_profile():
|
||||
# LittleCMS's built-in sRGB ("No copyright, use freely"), with its creation date fixed.
|
||||
icc = bytearray(ImageCms.ImageCmsProfile(ImageCms.createProfile("sRGB")).tobytes())
|
||||
d = FIXED_DATE
|
||||
icc[24:36] = b"".join(v.to_bytes(2, "big") for v in (d.year, d.month, d.day, 0, 0, 0))
|
||||
if icc[84:100] != bytes(16):
|
||||
sys.exit("error: the sRGB profile has an ID; recompute it after fixing the date")
|
||||
return bytes(icc)
|
||||
|
||||
|
||||
def write_tiff(svg, out):
|
||||
"""1x (72 dpi) and 2x (144 dpi) in one TIFF, as `tiffutil -cathidpicheck` writes them."""
|
||||
with tempfile.TemporaryDirectory() as tmp:
|
||||
one, two = (
|
||||
quantize(render(svg, WIDTH * s, os.path.join(tmp, f"{s}x.png"))) for s in (1, 2)
|
||||
)
|
||||
two.encoderinfo = {"dpi": (144, 144)} # the rest as the first page
|
||||
# Opaque 16-colour palette, Deflate: the artwork is three inks plus antialiasing, and a palette
|
||||
# keeps the file under ~100 KB (repository assets must stay small). As PhotoCraft's.
|
||||
one.save(
|
||||
out,
|
||||
"TIFF",
|
||||
save_all=True,
|
||||
append_images=[two],
|
||||
compression="tiff_adobe_deflate", # brand-ok: Pillow's name for TIFF compression 8 (Deflate)
|
||||
dpi=(72, 72),
|
||||
icc_profile=srgb_profile(),
|
||||
)
|
||||
with Image.open(out) as im:
|
||||
im.seek(1)
|
||||
if im.info.get("dpi") != (144, 144):
|
||||
sys.exit("error: the 2x page isn't 144 dpi (needs Pillow 12 or later)")
|
||||
strips = []
|
||||
for page in (0, 1):
|
||||
im.seek(page)
|
||||
strips += zip(im.tag_v2[273], im.tag_v2[279]) # StripOffsets, StripByteCounts
|
||||
# TIFF keeps directories and tag data on even offsets. When a strip ends on an odd one, libtiff
|
||||
# leaves the padding byte after it uninitialised, so the file changed from run to run with
|
||||
# identical pixels. Zero it: nothing refers to that byte.
|
||||
starts = {o for o, _ in strips}
|
||||
with open(out, "r+b") as f:
|
||||
for o, n in strips:
|
||||
if (o + n) % 2 and o + n not in starts:
|
||||
f.seek(o + n)
|
||||
f.write(bytes(1))
|
||||
|
||||
|
||||
def background_alias():
|
||||
# What Finder stores for /.background/background.tiff on the volume, minus anything about the
|
||||
# machine (dmgbuild writes the same kind of alias from a mounted image). Disk type 5 (ejectable),
|
||||
# the volume flags and the folder/file ids (25, 26) are what Finder wrote on a test image; the ids
|
||||
# are only hints, as the volume's creation date.
|
||||
volume = VolumeInfo(VOLUME, FIXED_DATE, b"H+", 5, 0x0D02, b"\0\0")
|
||||
volume.posix_path = f"/Volumes/{VOLUME}"
|
||||
target = TargetInfo(0, "background.tiff", 25, 26, FIXED_DATE, b"\0\0\0\0", b"\0\0\0\0")
|
||||
target.folder_name = ".background"
|
||||
target.cnid_path = [25]
|
||||
target.carbon_path = f"{VOLUME}:.background:\0background.tiff"
|
||||
target.posix_path = "/.background/background.tiff"
|
||||
return Alias(volume=volume, target=target).to_bytes()
|
||||
|
||||
|
||||
def write_ds_store(out):
|
||||
if os.path.exists(out):
|
||||
os.remove(out)
|
||||
with DSStore.open(out, "w+") as d:
|
||||
d["."]["bwsp"] = {
|
||||
"ShowStatusBar": False,
|
||||
"ShowToolbar": False,
|
||||
"ShowTabView": False,
|
||||
"ContainerShowSidebar": False,
|
||||
"ShowSidebar": False,
|
||||
"WindowBounds": f"{{{{200, 528}}, {{{WIDTH}, {HEIGHT + TITLE_BAR}}}}}",
|
||||
}
|
||||
d["."]["icvp"] = {
|
||||
"viewOptionsVersion": 1,
|
||||
"backgroundType": 2,
|
||||
"backgroundImageAlias": background_alias(),
|
||||
"backgroundColorRed": 1.0,
|
||||
"backgroundColorGreen": 1.0,
|
||||
"backgroundColorBlue": 1.0,
|
||||
"gridOffsetX": 0.0,
|
||||
"gridOffsetY": 0.0,
|
||||
"gridSpacing": 100.0,
|
||||
"arrangeBy": "none",
|
||||
"showIconPreview": True,
|
||||
"showItemInfo": False,
|
||||
"labelOnBottom": True,
|
||||
"textSize": 16.0,
|
||||
"iconSize": float(ICON_SIZE),
|
||||
}
|
||||
d["."]["vSrn"] = ("long", 1)
|
||||
for name, pos in ICONS.items():
|
||||
d[name]["Iloc"] = pos
|
||||
|
||||
|
||||
def main():
|
||||
if not shutil.which("resvg"):
|
||||
sys.exit("error: resvg not found (brew install resvg / cargo install resvg --locked)")
|
||||
write_tiff(os.path.join(HERE, "background.svg"), os.path.join(HERE, "background.tiff"))
|
||||
write_ds_store(os.path.join(HERE, "dmg-layout.DS_Store"))
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
@@ -131,10 +131,15 @@ STAGE="$WORK/dmg"
|
||||
mkdir -p "$STAGE"
|
||||
ditto "$APP" "$STAGE/CADCraft.app"
|
||||
ln -s /Applications "$STAGE/Applications"
|
||||
# Finder window layout: background, icon size and positions (packaging/macos/dmg/README.md).
|
||||
mkdir -p "$STAGE/.background"
|
||||
cp "$HERE/dmg/background.tiff" "$STAGE/.background/background.tiff"
|
||||
cp "$HERE/dmg/dmg-layout.DS_Store" "$STAGE/.DS_Store"
|
||||
rm -f "$DMG" "$WORK/raw.dmg"
|
||||
# makehybrid + convert builds the image without attaching a device, unlike `create -srcfolder`,
|
||||
# which is flaky on CI runners ("Resource busy") and hangs in sandboxed sessions.
|
||||
hdiutil makehybrid -hfs -hfs-volume-name "CADCraft $VERSION" -hfs-openfolder "$STAGE" -o "$WORK/raw.dmg" "$STAGE"
|
||||
# The volume name has no version: .DS_Store finds the background through an alias that includes it.
|
||||
hdiutil makehybrid -hfs -hfs-volume-name "CADCraft" -hfs-openfolder "$STAGE" -o "$WORK/raw.dmg" "$STAGE"
|
||||
hdiutil convert "$WORK/raw.dmg" -format UDZO -imagekey zlib-level=9 -o "$DMG"
|
||||
rm -f "$WORK/raw.dmg"
|
||||
sign "$DMG"
|
||||
|
||||
Reference in new issue
Block a user