flan/jellyfin-placard
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Audit + refactor: guard image decode/surface, clamp scrim & font size, Lazy typeface, dedupe backdrop lookup, drop unwired special-views scaffold

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This commit is contained in:
flan
2026-07-19 19:58:23 +00:00
parent 4260b8cb7e
commit 7e17023260
10 changed files with 249 additions and 103 deletions
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CHANGELOG.md
+2 -4
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@@ -13,11 +13,9 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
- Backdrop source rules: highest-rated / random / newest title in the library.
- Per-library pinned sources (`Library Name=Item Title`) to override the rule.
- Configuration page (enable, source rule, scrim opacity, label size, pins).
- SkiaSharp-based renderer, incl. a procedural SMPTE color-bars generator for
views that have no media backdrop.
- SkiaSharp-based renderer that clamps out-of-range settings.
### Notes
- Sets images through the internal provider API, so the home-screen view cache
updates without a server restart.
- Special views (Live TV / Playlists) are scaffolded (`IncludeSpecialViews`,
color-bars renderer) but not yet wired into the task. Planned for 1.1.
- Special views (Live TV / Playlists) are not covered yet. Planned for 1.1.
Jellyfin.Plugin.Placard/CardRenderer.cs
+40 -63
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@@ -1,3 +1,4 @@
using System;
using System.Reflection;
using SkiaSharp;
@@ -6,62 +7,45 @@ namespace Jellyfin.Plugin.Placard;
/// <summary>Composites a library name onto a backdrop, matching Jellyfin's default cover style.</summary>
public static class CardRenderer
{
private static SKTypeface? _typeface;
private const float FitWidthFraction = 0.90f; // label spans at most this much of the width
private const float ShadowBlurDivisor = 20f; // blur radius = fontSize / this
private const float ShadowOffsetDivisor = 28f; // shadow offset = fontSize / this
private const int MinFontSize = 12;
private const int JpegQuality = 92;
private static SKTypeface Typeface
private static readonly Lazy<SKTypeface> LazyTypeface = new(LoadTypeface);
private static SKTypeface Typeface => LazyTypeface.Value;
private static SKTypeface LoadTypeface()
{
get
var asm = Assembly.GetExecutingAssembly();
using var stream = asm.GetManifestResourceStream("Jellyfin.Plugin.Placard.Fonts.NotoSans-Bold.ttf");
if (stream is null)
{
if (_typeface != null)
{
return _typeface;
}
var asm = Assembly.GetExecutingAssembly();
using var s = asm.GetManifestResourceStream("Jellyfin.Plugin.Placard.Fonts.NotoSans-Bold.ttf");
_typeface = s != null
? SKTypeface.FromStream(s)
: SKTypeface.FromFamilyName("sans-serif", SKFontStyle.Bold);
return _typeface;
return SKTypeface.FromFamilyName("sans-serif", SKFontStyle.Bold);
}
// Copy into SKData so the typeface does not depend on the (disposed) resource stream.
using var data = SKData.Create(stream);
return SKTypeface.FromData(data) ?? SKTypeface.FromFamilyName("sans-serif", SKFontStyle.Bold);
}
/// <summary>Render <paramref name="label"/> centered on the image at <paramref name="backdropPath"/>.</summary>
/// <param name="scrim">Darkening overlay opacity, 0-255.</param>
/// <param name="fontHeightPct">Label height as a percent of image height.</param>
public static byte[] Render(string backdropPath, string label, int scrim, int fontHeightPct)
{
using var input = SKBitmap.Decode(backdropPath);
return RenderBitmap(input, label, scrim, fontHeightPct);
}
using var input = SKBitmap.Decode(backdropPath)
?? throw new InvalidOperationException($"Placard could not decode backdrop image: {backdropPath}");
/// <summary>Generate SMPTE color bars and label them (for Live TV, which has no media backdrop).</summary>
public static byte[] RenderColorBars(string label, int scrim)
{
const int w = 1920;
const int h = 1080;
using var bmp = new SKBitmap(w, h);
using (var canvas = new SKCanvas(bmp))
{
var cols = new[]
{
new SKColor(192, 192, 192), new SKColor(192, 192, 0), new SKColor(0, 192, 192),
new SKColor(0, 192, 0), new SKColor(192, 0, 192), new SKColor(192, 0, 0), new SKColor(0, 0, 192)
};
float bw = (float)w / cols.Length;
for (int i = 0; i < cols.Length; i++)
{
using var p = new SKPaint { Color = cols[i] };
canvas.DrawRect(i * bw, 0, bw + 1, h, p);
}
}
return RenderBitmap(bmp, label, scrim, 20);
}
private static byte[] RenderBitmap(SKBitmap input, string label, int scrim, int fontHeightPct)
{
int w = input.Width;
int h = input.Height;
using var surface = SKSurface.Create(new SKImageInfo(w, h));
scrim = Math.Clamp(scrim, 0, 255);
fontHeightPct = Math.Clamp(fontHeightPct, 5, 40);
using var surface = SKSurface.Create(new SKImageInfo(w, h))
?? throw new InvalidOperationException($"Placard could not create a {w}x{h} drawing surface");
var canvas = surface.Canvas;
canvas.DrawBitmap(input, 0, 0);
@@ -70,20 +54,22 @@ public static class CardRenderer
canvas.DrawRect(0, 0, w, h, scrimPaint);
}
using var text = new SKPaint { Typeface = Typeface, IsAntialias = true, Color = SKColors.White };
// Shrink until the label fits within FitWidthFraction of the width.
float size = h * fontHeightPct / 100f;
using var measure = new SKPaint { Typeface = Typeface, IsAntialias = true };
for (; size > 12; size -= 4)
for (; size > MinFontSize; size -= 4)
{
measure.TextSize = size;
if (measure.MeasureText(label) <= w * 0.90f)
text.TextSize = size;
if (text.MeasureText(label) <= w * FitWidthFraction)
{
break;
}
}
measure.TextSize = size;
text.TextSize = size;
SKRect bounds = default;
measure.MeasureText(label, ref bounds);
text.MeasureText(label, ref bounds);
float x = ((w - bounds.Width) / 2f) - bounds.Left;
float y = ((h - bounds.Height) / 2f) - bounds.Top;
@@ -93,25 +79,16 @@ public static class CardRenderer
TextSize = size,
IsAntialias = true,
Color = new SKColor(0, 0, 0, 205),
MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, size / 20f)
MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, size / ShadowBlurDivisor)
})
{
canvas.DrawText(label, x, y + (size / 28f), shadow);
canvas.DrawText(label, x, y + (size / ShadowOffsetDivisor), shadow);
}
using (var text = new SKPaint
{
Typeface = Typeface,
TextSize = size,
IsAntialias = true,
Color = SKColors.White
})
{
canvas.DrawText(label, x, y, text);
}
canvas.DrawText(label, x, y, text);
using var image = surface.Snapshot();
using var data = image.Encode(SKEncodedImageFormat.Jpeg, 92);
using var data = image.Encode(SKEncodedImageFormat.Jpeg, JpegQuality);
return data.ToArray();
}
}
Jellyfin.Plugin.Placard/Configuration/PluginConfiguration.cs
-3
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@@ -24,9 +24,6 @@ public class PluginConfiguration : BasePluginConfiguration
/// <summary>Label height as a percent of image height.</summary>
public int FontHeightPercent { get; set; } = 20;
/// <summary>Also label Live TV (SMPTE color bars) and Playlists.</summary>
public bool IncludeSpecialViews { get; set; } = true;
/// <summary>
/// Per-library pinned source titles, one per line as "Library Name=Item Title".
/// A pinned library uses that item's backdrop instead of the <see cref="Source"/> rule.
Jellyfin.Plugin.Placard/Configuration/configPage.html
+1 -10
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@@ -45,16 +45,9 @@
<input is="emby-input" type="number" id="FontHeightPercent" min="8" max="40" />
</div>
<div class="checkboxContainer checkboxContainer-withDescription">
<label>
<input is="emby-checkbox" type="checkbox" id="IncludeSpecialViews" />
<span>Include Live TV (color bars) and Playlists</span>
</label>
</div>
<div class="inputContainer">
<label class="inputLabel inputLabelUnfocused" for="PinnedSources">Pinned sources</label>
<textarea is="emby-textarea" id="PinnedSources" rows="6"
<textarea id="PinnedSources" rows="6" class="emby-input"
placeholder="Movies=The Dark Knight&#10;Anime=Death Note"></textarea>
<div class="fieldDescription">
One per line as <code>Library Name=Item Title</code>. Pinned libraries use that title's
@@ -80,7 +73,6 @@
document.querySelector('#Source').value = config.Source;
document.querySelector('#ScrimOpacity').value = config.ScrimOpacity;
document.querySelector('#FontHeightPercent').value = config.FontHeightPercent;
document.querySelector('#IncludeSpecialViews').checked = config.IncludeSpecialViews;
document.querySelector('#PinnedSources').value = config.PinnedSources || '';
Dashboard.hideLoadingMsg();
});
@@ -94,7 +86,6 @@
config.Source = parseInt(document.querySelector('#Source').value, 10);
config.ScrimOpacity = parseInt(document.querySelector('#ScrimOpacity').value, 10);
config.FontHeightPercent = parseInt(document.querySelector('#FontHeightPercent').value, 10);
config.IncludeSpecialViews = document.querySelector('#IncludeSpecialViews').checked;
config.PinnedSources = document.querySelector('#PinnedSources').value;
ApiClient.updatePluginConfiguration(PlacardPluginId, config).then(function (result) {
Dashboard.processPluginConfigurationUpdateResult(result);
Jellyfin.Plugin.Placard/PlacardTask.cs
+20 -23
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@@ -19,6 +19,12 @@ namespace Jellyfin.Plugin.Placard;
/// <summary>Scheduled task that (re)generates a labeled Primary image for each library.</summary>
public class PlacardTask : IScheduledTask
{
private static readonly BaseItemKind[] SourceTypes =
{
BaseItemKind.Movie, BaseItemKind.Series,
BaseItemKind.MusicArtist, BaseItemKind.BoxSet, BaseItemKind.MusicAlbum
};
private readonly ILibraryManager _libraryManager;
private readonly IProviderManager _providerManager;
private readonly ILogger<PlacardTask> _logger;
@@ -62,6 +68,7 @@ public class PlacardTask : IScheduledTask
var pins = ParsePins(config.PinnedSources);
_logger.LogInformation("Placard: processing {Count} libraries ({Pins} pinned)", folders.Count, pins.Count);
int done = 0;
foreach (var folder in folders)
{
@@ -79,11 +86,8 @@ public class PlacardTask : IScheduledTask
}
}
private static readonly BaseItemKind[] SourceTypes =
{
BaseItemKind.Movie, BaseItemKind.Series,
BaseItemKind.MusicArtist, BaseItemKind.BoxSet, BaseItemKind.MusicAlbum
};
private static ItemImageInfo? Backdrop(BaseItem item)
=> item.GetImages(ImageType.Backdrop).FirstOrDefault();
private static Dictionary<string, string> ParsePins(string raw)
{
@@ -106,7 +110,7 @@ public class PlacardTask : IScheduledTask
return pins;
}
private (ItemSortBy, SortOrder)[] OrderFor(SourceRule rule) => rule switch
private static (ItemSortBy, SortOrder)[] OrderFor(SourceRule rule) => rule switch
{
SourceRule.Newest => new[] { (ItemSortBy.DateCreated, SortOrder.Descending) },
SourceRule.Random => new[] { (ItemSortBy.Random, SortOrder.Ascending) },
@@ -115,20 +119,20 @@ public class PlacardTask : IScheduledTask
private BaseItem? PickSource(CollectionFolder folder, PluginConfiguration config, IReadOnlyDictionary<string, string> pins)
{
// Pinned title wins.
// A pinned title wins, when it exists and has a backdrop.
if (pins.TryGetValue(folder.Name, out var pinned) && !string.IsNullOrWhiteSpace(pinned))
{
var byName = _libraryManager.GetItemList(new InternalItemsQuery
var candidates = _libraryManager.GetItemList(new InternalItemsQuery
{
Parent = folder,
Recursive = true,
SearchTerm = pinned,
IncludeItemTypes = SourceTypes,
Limit = 15
});
var match = byName.FirstOrDefault(i =>
string.Equals(i.Name, pinned, StringComparison.OrdinalIgnoreCase) && i.GetImages(ImageType.Backdrop).Any())
?? byName.FirstOrDefault(i => i.GetImages(ImageType.Backdrop).Any());
}).Where(i => Backdrop(i) is not null).ToList();
var match = candidates.FirstOrDefault(i => string.Equals(i.Name, pinned, StringComparison.OrdinalIgnoreCase))
?? candidates.FirstOrDefault();
if (match is not null)
{
return match;
@@ -144,23 +148,16 @@ public class PlacardTask : IScheduledTask
IncludeItemTypes = SourceTypes,
OrderBy = OrderFor(config.Source),
Limit = 60
}).FirstOrDefault(i => i.GetImages(ImageType.Backdrop).Any());
}).FirstOrDefault(i => Backdrop(i) is not null);
}
private async Task ProcessFolderAsync(CollectionFolder folder, PluginConfiguration config, IReadOnlyDictionary<string, string> pins, CancellationToken cancellationToken)
{
var source = PickSource(folder, config, pins);
if (source is null)
var backdropPath = source is null ? null : Backdrop(source)?.Path;
if (source is null || string.IsNullOrEmpty(backdropPath) || !File.Exists(backdropPath))
{
_logger.LogWarning("Placard: no backdrop candidate found for {Name}", folder.Name);
return;
}
var backdropPath = source.GetImages(ImageType.Backdrop).First().Path;
if (string.IsNullOrEmpty(backdropPath) || !File.Exists(backdropPath))
{
_logger.LogWarning("Placard: backdrop path missing for {Name}", folder.Name);
_logger.LogWarning("Placard: no usable backdrop found for {Name}", folder.Name);
return;
}
add_repo_check.py
+29
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@@ -0,0 +1,29 @@
import sys, json, time, urllib.request
BASE="http://192.168.50.1:30013"; USER="flan"
MYURL="https://git.onetick.ninja/flan/jellyfin-placard/raw/branch/main/manifest.json"
H='MediaBrowser Client="poster-pin", Device="code", DeviceId="poster-pin-code-8e1f", Version="1.0"'
def call(p,m="GET",d=None,h=None):
r=urllib.request.Request(BASE+p,data=d,method=m,headers=h or {})
with urllib.request.urlopen(r,timeout=30) as x:
b=x.read(); return json.loads(b) if b else None
pw=sys.stdin.readline().rstrip("\n")
res=call("/Users/AuthenticateByName","POST",json.dumps({"Username":USER,"Pw":pw}).encode(),
{"Authorization":H,"Content-Type":"application/json"})
TOK={"Authorization":f'MediaBrowser Token="{res["AccessToken"]}"'}
repos=call("/Repositories",h=TOK) or []
print("existing repos:", [r.get("Name") for r in repos])
if not any(r.get("Url")==MYURL for r in repos):
repos.append({"Name":"Placard (flan)","Url":MYURL,"Enabled":True})
call("/Repositories","POST",json.dumps(repos).encode(),{**TOK,"Content-Type":"application/json"})
print("-> repo added")
else:
print("-> repo already present")
time.sleep(5)
pkgs=call("/Packages",h=TOK) or []
placard=[p for p in pkgs if "placard" in (p.get("name","")).lower()]
if placard:
p=placard[0]
print("CATALOG OK:", p.get("name"), "| guid:", p.get("guid"),
"| versions:", [v.get("version") for v in p.get("versions",[])])
else:
print("CATALOG: Placard NOT found (container may not reach the manifest URL, or cache lag)")
gh_release.py
+43
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@@ -0,0 +1,43 @@
import sys, os, json, time, hashlib, urllib.request, urllib.error
gh_tok=sys.stdin.readline().strip()
GH="https://api.github.com"; UP="https://uploads.github.com"
ZIP="/home/dev/jellyfin-placard/Jellyfin.Plugin.Placard/bin/Release/net9.0/placard_1.0.0.0.zip"
if not os.path.exists(ZIP):
print("ZIP MISSING:", ZIP); sys.exit(1)
zbytes=open(ZIP,"rb").read()
print("zip:", len(zbytes), "bytes md5", hashlib.md5(zbytes).hexdigest())
def gh(base,path,method="GET",body=None,data=None,ctype="application/json"):
if body is not None: data=json.dumps(body).encode()
h={"Authorization":f"Bearer {gh_tok}","Accept":"application/vnd.github+json"}
if data is not None: h["Content-Type"]=ctype
r=urllib.request.Request(base+path,data=data,method=method,headers=h)
with urllib.request.urlopen(r,timeout=90) as x:
b=x.read(); return json.loads(b) if b else None
# wait for mirrored tag
ok=False
for _ in range(40):
try: gh(GH,"/repos/sudolulo/jellyfin-placard/git/refs/tags/v1.0.0"); ok=True; break
except urllib.error.HTTPError as e:
if e.code==404: time.sleep(3)
else: raise
print("tag v1.0.0 present on github:", ok)
# create (or fetch) release
try:
rel=gh(GH,"/repos/sudolulo/jellyfin-placard/releases","POST",
{"tag_name":"v1.0.0","name":"Placard 1.0.0","body":"Initial release.","draft":False,"prerelease":False})
except urllib.error.HTTPError as e:
if e.code==422:
rel=gh(GH,"/repos/sudolulo/jellyfin-placard/releases/tags/v1.0.0")
else:
print("release err:", e.code, e.read()[:200].decode(errors='replace')); raise
rid=rel["id"]; print("release id:", rid)
# upload asset (delete existing same-name first if present)
for a in rel.get("assets",[]):
if a["name"]=="placard_1.0.0.0.zip":
gh(GH,f"/repos/sudolulo/jellyfin-placard/releases/assets/{a['id']}","DELETE")
try:
asset=gh(UP,f"/repos/sudolulo/jellyfin-placard/releases/{rid}/assets?name=placard_1.0.0.0.zip",
"POST",data=zbytes,ctype="application/zip")
print("ASSET_URL:", asset.get("browser_download_url"))
except urllib.error.HTTPError as e:
print("asset upload:", e.code, e.read()[:200].decode(errors='replace'))
install_official.py
+50
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@@ -0,0 +1,50 @@
import sys, json, time, urllib.request, urllib.error
from urllib.parse import quote
BASE="http://192.168.50.1:30013"; USER="flan"
GUID="b6f8e2a4-1c3d-4e5f-9a7b-2d4c6e8f0a1b"
MYURL="https://git.onetick.ninja/flan/jellyfin-placard/raw/branch/main/manifest.json"
H='MediaBrowser Client="poster-pin", Device="code", DeviceId="poster-pin-code-8e1f", Version="1.0"'
def call(p,m="GET",d=None,h=None,t=30):
r=urllib.request.Request(BASE+p,data=d,method=m,headers=h or {})
with urllib.request.urlopen(r,timeout=t) as x:
b=x.read(); return json.loads(b) if b else None
def auth(pw):
r=call("/Users/AuthenticateByName","POST",json.dumps({"Username":USER,"Pw":pw}).encode(),
{"Authorization":H,"Content-Type":"application/json"})
return {"Authorization":f'MediaBrowser Token="{r["AccessToken"]}"'}
pw=sys.stdin.readline().rstrip("\n"); TOK=auth(pw)
# 1. uninstall the manually-dropped plugin
try:
call(f"/Plugins/{GUID}/1.0.0.0","DELETE",h=TOK); print("uninstalled manual copy")
except urllib.error.HTTPError as e:
print("uninstall ->", e.code)
time.sleep(3)
# 2. install from the catalog (downloads + checksum-verifies the release zip)
q=f"version=1.0.0.0&assemblyGuid={GUID}&repositoryUrl={quote(MYURL, safe='')}"
try:
call(f"/Packages/Installed/Placard?{q}","POST",h=TOK); print("catalog install queued")
except urllib.error.HTTPError as e:
print("install ->", e.code, e.read()[:200])
time.sleep(10)
# 3. restart to activate
print("restart ...")
try: call("/System/Restart","POST",h=TOK,t=10)
except Exception: pass
time.sleep(12)
for _ in range(75):
try: call("/System/Info/Public"); break
except Exception: time.sleep(2)
time.sleep(4); TOK=auth(pw)
# 4. verify loaded + config reachable
plugins=call("/Plugins",h=TOK) or []
pl=[p for p in plugins if "placard" in p.get("Name","").lower()]
if pl:
print("INSTALLED:", pl[0].get("Name"), pl[0].get("Version"), "status:", pl[0].get("Status"),
"| canUninstall:", pl[0].get("CanUninstall"))
else:
print("Placard NOT loaded after install")
try:
cfg=call(f"/Plugins/{GUID}/Configuration",h=TOK)
print("config OK; pins lines:", len((cfg or {}).get("PinnedSources","").splitlines()))
except urllib.error.HTTPError as e:
print("config ->", e.code)
recon_mirrors.py
+17
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@@ -0,0 +1,17 @@
import sys, json, urllib.request
GITEA="https://git.onetick.ninja/api/v1"
token=sys.stdin.readline().strip()
def g(path):
r=urllib.request.Request(GITEA+path, headers={"Authorization":f"token {token}"})
with urllib.request.urlopen(r,timeout=20) as x: return json.loads(x.read())
repos=[r["name"] for r in g("/users/flan/repos?limit=50") if not r["private"]]
for name in repos:
try: pm=g(f"/repos/flan/{name}/push_mirrors")
except Exception: pm=[]
try: topics=g(f"/repos/flan/{name}/topics").get("topics",[])
except Exception: topics=[]
if pm:
for m in pm:
print(f"[MIRROR] {name:26s} -> {m.get('remote_address')} sync_on_commit={m.get('sync_on_commit')} topics={topics}")
else:
print(f" {name:26s} topics={topics}")
setup_mirror.py
+47
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@@ -0,0 +1,47 @@
import sys, json, urllib.request, urllib.error
gitea_tok = sys.stdin.readline().strip()
gh_tok = sys.stdin.readline().strip()
GITEA="https://git.onetick.ninja/api/v1"; GH="https://api.github.com"
def api(base, path, tokhdr, method="GET", body=None, extra=None):
d=json.dumps(body).encode() if body is not None else None
h={"Authorization":tokhdr,"Content-Type":"application/json"}
if extra: h.update(extra)
r=urllib.request.Request(base+path, data=d, method=method, headers=h)
with urllib.request.urlopen(r,timeout=30) as x:
b=x.read(); return json.loads(b) if b else None
def gitea(p,m="GET",b=None): return api(GITEA,p,f"token {gitea_tok}",m,b)
def gh(p,m="GET",b=None): return api(GH,p,f"Bearer {gh_tok}",m,b,{"Accept":"application/vnd.github+json"})
TOPICS=["jellyfin","jellyfin-plugin","skiasharp","dotnet","media-server"]
# 1. create GitHub repo
try:
repo=gh("/user/repos","POST",{"name":"jellyfin-placard",
"description":"Jellyfin plugin: bake library names onto backdrops (Placard)",
"private":False,"has_issues":True,"has_wiki":False,
"homepage":"https://git.onetick.ninja/flan/jellyfin-placard"})
print("github repo:", repo.get("full_name"))
except urllib.error.HTTPError as e:
print("gh repo:", e.code, e.read()[:150].decode(errors='replace'))
# github topics
try:
gh("/repos/sudolulo/jellyfin-placard/topics","PUT",{"names":TOPICS}); print("gh topics set")
except urllib.error.HTTPError as e: print("gh topics:", e.code)
# 2. gitea push-mirror -> github
try:
pm=gitea("/repos/flan/jellyfin-placard/push_mirrors","POST",{
"remote_address":"https://github.com/sudolulo/jellyfin-placard.git",
"remote_username":"sudolulo","remote_password":gh_tok,
"sync_on_commit":True,"interval":"8h0m0s"})
print("push-mirror:", pm.get("remote_address"), "sync_on_commit", pm.get("sync_on_commit"))
except urllib.error.HTTPError as e:
print("push_mirror:", e.code, e.read()[:200].decode(errors='replace'))
# gitea topics
try:
gitea("/repos/flan/jellyfin-placard/topics","PUT",{"topics":TOPICS}); print("gitea topics set")
except urllib.error.HTTPError as e: print("gitea topics:", e.code)
# 3. trigger sync
try:
gitea("/repos/flan/jellyfin-placard/push_mirrors-sync","POST"); print("mirror sync triggered")
except urllib.error.HTTPError as e: print("sync:", e.code, e.read()[:150].decode(errors='replace'))