JavaScript port: loading screen with the app icon and light/dark colours by shai-almog · Pull Request #6126 · codenameone/CodenameOne

shai-almog · 2026-10-28T13:08:54Z

Implements discussion #6117.

The loading screen shows the app icon (the 192px PWA icon) above the progress bar; javascript.splash.logo names another image or none.
javascript.splash.{background,textColor,accentColor} and dark* variants set the colours; javascript.splash.appearance is auto/light/dark. With no dark colour named the default stays light, so existing apps do not change.
The theme is written into <head>, so the first paint is already the right colour; the page background clears when the first form shows.
platformHint.javascript.splashAppearance lets an app remember its own light/dark choice for the next launch (local storage, read before first paint).
Values are validated (hex or CSS named colours, plain bundle paths) since they are written into the page; the CSP hashes the new inline blocks as before.
Developer guide section rewritten; hints declared in the catalog.

Companion builder PR: codenameone/BuildDaemon (branch js-splash-screen).

🤖 Generated with Claude Code

…urs (#6117) Build hints javascript.splash.* set the colours, appearance mode and logo; the theme is written into <head> so a dark app never opens on white, and platformHint.javascript.splashAppearance remembers the app's own choice. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…ames, transparent page once started Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

github-actions · 2026-10-28T15:23:44Z

✅ Continuous Quality Report

Test & Coverage

✅ Tests: 14678 total, 0 failed, 161 skipped
📊 Line coverage: 64.85% [HTML preview] [Download]
- Lowest covered classes
  - com.codename1.io.zip.ZipArchiveOutputStream – 0.00%
  - com.codename1.gaming.level.GameSceneView – 0.00%
  - com.codename1.crash.CrashProtection – 0.00%
  - com.codename1.mapping.JsonValues – 0.00%
  - com.codename1.payment.CommerceManager – 0.00%
  - com.codename1.io.outbox.Outbox – 0.00%
  - com.codename1.security.CertificateRequest – 0.00%
  - com.codename1.wearable.WearableMessage – 0.00%
  - com.codename1.ui.plaf.GlassLensBlend – 0.00%
  - com.codename1.vr.VRView – 0.00%

Static Analysis

SpotBugs [Report archive]
- ✅ ByteCodeTranslator: 0 findings (no issues)
- ✅ android: 0 findings (no issues)
- ✅ android-compat: 0 findings (no issues)
- ✅ android-res-compiler: 0 findings (no issues)
- ✅ backend: 0 findings (no issues)
- ✅ backend-test: 0 findings (no issues)
- ✅ build-engine: 0 findings (no issues)
- ✅ build-hint-catalog: 0 findings (no issues)
- ✅ build-hint-tools: 0 findings (no issues)
- ✅ codenameone-gradle-plugin: 0 findings (no issues)
- ✅ codenameone-maven-plugin: 0 findings (no issues)
- ✅ core-unittests: 0 findings (no issues)
- ✅ desktop-compat-runtime: 0 findings (no issues)
- ✅ fxml-compiler: 0 findings (no issues)
- ✅ ios: 0 findings (no issues)
- ✅ javac: 0 findings (no issues)
- ✅ javafx-compat: 0 findings (no issues)
- ✅ project-model: 0 findings (no issues)
- ✅ swing-compat: 0 findings (no issues)
✅ PMD: 0 findings (no issues) [Report archive]
✅ Checkstyle: 0 findings (no issues) [Report archive]

Generated automatically by the PR CI workflow.

github-actions · 2026-10-28T15:25:43Z

Cloudflare Preview

URL: https://pr-6126-website-preview.codenameone.pages.dev
Branch: pr-6126-website-preview

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

github-actions · 2026-10-28T16:09:49Z

Flutter vs Codename One

No benchmark results were produced.

github-actions · 2026-10-28T16:50:45Z

Developer Guide build artifacts are available for download from this workflow run:

Developer Guide quality checks:

AsciiDoc linter: No issues found (report)
Vale: No alerts found (report)
Paragraph capitalization: No paragraph capitalization issues (report)
LanguageTool: No grammar matches (report)
Image references: No unused images detected (report)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog · 2026-10-28T21:15:53Z

Compared 191 screenshots: 191 matched.

Native Android coverage

📊 Line coverage: 18.91% (48255/255242 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
- Other counters: instruction 17.64% (229223/1299291), branch 12.05% (16823/139631), complexity 9.68% (12916/133391), method 14.59% (9124/62546), class 25.16% (1775/7056)
- Lowest covered classes
  - kotlin.collections.kotlin.collections.ArraysKt___ArraysKt – 0.00% (0/6356 lines covered)
  - kotlin.collections.unsigned.kotlin.collections.unsigned.UArraysKt___UArraysKt – 0.00% (0/2384 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.ClassReader – 0.00% (0/1524 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.MethodWriter – 0.00% (0/922 lines covered)
  - kotlinx.coroutines.channels.kotlinx.coroutines.channels.BufferedChannel – 0.00% (0/832 lines covered)
  - kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/735 lines covered)
  - com.google.common.cache.com.google.common.cache.LocalCache$Segment – 0.00% (0/726 lines covered)
  - okio.okio.Buffer – 0.00% (0/687 lines covered)
  - com.codename1.androidcompat.rt.com.codename1.androidcompat.rt.TextXmlPullParser – 0.00% (0/623 lines covered)
  - kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/623 lines covered)

✅ Native Android screenshot tests passed.

Native Android coverage

📊 Line coverage: 18.91% (48255/255242 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
- Other counters: instruction 17.64% (229223/1299291), branch 12.05% (16823/139631), complexity 9.68% (12916/133391), method 14.59% (9124/62546), class 25.16% (1775/7056)
- Lowest covered classes
  - kotlin.collections.kotlin.collections.ArraysKt___ArraysKt – 0.00% (0/6356 lines covered)
  - kotlin.collections.unsigned.kotlin.collections.unsigned.UArraysKt___UArraysKt – 0.00% (0/2384 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.ClassReader – 0.00% (0/1524 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.MethodWriter – 0.00% (0/922 lines covered)
  - kotlinx.coroutines.channels.kotlinx.coroutines.channels.BufferedChannel – 0.00% (0/832 lines covered)
  - kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/735 lines covered)
  - com.google.common.cache.com.google.common.cache.LocalCache$Segment – 0.00% (0/726 lines covered)
  - okio.okio.Buffer – 0.00% (0/687 lines covered)
  - com.codename1.androidcompat.rt.com.codename1.androidcompat.rt.TextXmlPullParser – 0.00% (0/623 lines covered)
  - kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/623 lines covered)

Benchmark Results

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	scalar fallback (no native SIMD)
SIMD int-add (64K x300)	java 175ms / native 81ms = 2.1x speedup
SIMD float-mul (64K x300)	java 135ms / native 61ms = 2.2x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	gated to scalar (CPU autovectorizes scalar; explicit SIMD not beneficial here)
Base64 CN1 encode	60.000 ms
Base64 CN1 decode	67.000 ms
Base64 native encode	355.000 ms
Base64 encode ratio (CN1/native)	0.169x (83.1% faster)
Base64 native decode	269.000 ms
Base64 decode ratio (CN1/native)	0.249x (75.1% faster)
Image encode benchmark status	skipped (SIMD unsupported)

shai-almog · 2026-10-28T21:18:56Z

Compared 227 screenshots: 227 matched.
✅ JavaScript-port screenshot tests passed.

shai-almog · 2026-10-28T22:38:02Z

Compared 249 screenshots: 249 matched.
✅ Native Apple Watch (watchOS, Core Graphics) screenshot tests passed.

shai-almog · 2026-10-28T22:47:08Z

Compared 188 screenshots: 188 matched.
✅ Native Mac screenshot tests passed.

Benchmark Results

VM Translation Time: 0 seconds
Compilation Time: 798 seconds

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	SSE2 (x64) / NEON (arm64) native kernels
SIMD int-add (64K x300)	java 53ms / native 3ms = 17.6x speedup
SIMD float-mul (64K x300)	java 53ms / native 3ms = 17.6x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	active (NEON-accelerated)
Base64 CN1 encode	94.000 ms
Base64 CN1 decode	65.000 ms
Base64 native encode	694.000 ms
Base64 encode ratio (CN1/native)	0.135x (86.5% faster)
Base64 native decode	354.000 ms
Base64 decode ratio (CN1/native)	0.184x (81.6% faster)
Base64 SIMD encode	62.000 ms
Base64 encode ratio (SIMD/CN1)	0.660x (34.0% faster)
Base64 SIMD decode	58.000 ms
Base64 decode ratio (SIMD/CN1)	0.892x (10.8% faster)
Base64 encode ratio (SIMD/native)	0.089x (91.1% faster)
Base64 decode ratio (SIMD/native)	0.164x (83.6% faster)
Image encode benchmark iterations	100
Image createMask (SIMD off)	7.000 ms
Image createMask (SIMD on)	3.000 ms
Image createMask ratio (SIMD on/off)	0.429x (57.1% faster)
Image applyMask (SIMD off)	52.000 ms
Image applyMask (SIMD on)	55.000 ms
Image applyMask ratio (SIMD on/off)	1.058x (5.8% slower)
Image modifyAlpha (SIMD off)	58.000 ms
Image modifyAlpha (SIMD on)	35.000 ms
Image modifyAlpha ratio (SIMD on/off)	0.603x (39.7% faster)
Image modifyAlpha removeColor (SIMD off)	59.000 ms
Image modifyAlpha removeColor (SIMD on)	54.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.915x (8.5% faster)

shai-almog · 2026-10-28T22:59:45Z

Compared 189 screenshots: 189 matched.
✅ Native iOS Metal screenshot tests passed.

Benchmark Results

VM Translation Time: 0 seconds
Compilation Time: 2244 seconds

Build and Run Timing

Metric	Duration
Simulator Boot	76000 ms
Simulator Boot (Run)	0 ms
App Install	16000 ms
App Launch	4000 ms
Test Execution	524000 ms

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	SSE2 (x64) / NEON (arm64) native kernels
SIMD int-add (64K x300)	java 358ms / native 4ms = 89.5x speedup
SIMD float-mul (64K x300)	java 241ms / native 8ms = 30.1x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	active (NEON-accelerated)
Base64 CN1 encode	116.000 ms
Base64 CN1 decode	172.000 ms
Base64 native encode	2219.000 ms
Base64 encode ratio (CN1/native)	0.052x (94.8% faster)
Base64 native decode	1607.000 ms
Base64 decode ratio (CN1/native)	0.107x (89.3% faster)
Base64 SIMD encode	97.000 ms
Base64 encode ratio (SIMD/CN1)	0.836x (16.4% faster)
Base64 SIMD decode	80.000 ms
Base64 decode ratio (SIMD/CN1)	0.465x (53.5% faster)
Base64 encode ratio (SIMD/native)	0.044x (95.6% faster)
Base64 decode ratio (SIMD/native)	0.050x (95.0% faster)
Image encode benchmark iterations	100
Image createMask (SIMD off)	12.000 ms
Image createMask (SIMD on)	6.000 ms
Image createMask ratio (SIMD on/off)	0.500x (50.0% faster)
Image applyMask (SIMD off)	113.000 ms
Image applyMask (SIMD on)	151.000 ms
Image applyMask ratio (SIMD on/off)	1.336x (33.6% slower)
Image modifyAlpha (SIMD off)	113.000 ms
Image modifyAlpha (SIMD on)	450.000 ms
Image modifyAlpha ratio (SIMD on/off)	3.982x (298.2% slower)
Image modifyAlpha removeColor (SIMD off)	83.000 ms
Image modifyAlpha removeColor (SIMD on)	109.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	1.313x (31.3% slower)

shai-almog · 2026-10-28T23:06:07Z

Compared 206 screenshots: 206 matched.
Native Windows port, REAL shipping pipeline: the hellocodenameone screenshot suite rendered by a binary CROSS-COMPILED on Linux (clang-cl + xwin, WebView2 linked) and RUN on a Windows x64 runner. Compared against the in-repo baseline in scripts/windows/screenshots.

Benchmark Results

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	SSE2 (x64) / NEON (arm64) native kernels
SIMD int-add (64K x300)	java 59ms / native 5ms = 11.8x speedup
SIMD float-mul (64K x300)	java 57ms / native 5ms = 11.4x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 native bridge	unavailable (CN1 + SIMD + image benchmarks only)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	gated to scalar (CPU autovectorizes scalar; explicit SIMD not beneficial here)
Base64 CN1 encode	74.000 ms
Base64 CN1 decode	93.000 ms
Base64 SIMD encode	113.000 ms
Base64 encode ratio (SIMD/CN1)	1.527x (52.7% slower)
Base64 SIMD decode	104.000 ms
Base64 decode ratio (SIMD/CN1)	1.118x (11.8% slower)
Image encode benchmark iterations	100
Image createMask (SIMD off)	9.000 ms
Image createMask (SIMD on)	4.000 ms
Image createMask ratio (SIMD on/off)	0.444x (55.6% faster)
Image applyMask (SIMD off)	30.000 ms
Image applyMask (SIMD on)	27.000 ms
Image applyMask ratio (SIMD on/off)	0.900x (10.0% faster)
Image modifyAlpha (SIMD off)	33.000 ms
Image modifyAlpha (SIMD on)	15.000 ms
Image modifyAlpha ratio (SIMD on/off)	0.455x (54.5% faster)
Image modifyAlpha removeColor (SIMD off)	29.000 ms
Image modifyAlpha removeColor (SIMD on)	21.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.724x (27.6% faster)

shai-almog and others added 3 commits October 28, 2026 14:54

JavaScript splash: light unless a dark colour is named, real colour n…

5e2b3be

…ames, transparent page once started Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

JavaScript port: mark the page started on the in-page splash path too

8b664f8

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: move the splash appearance sample into a demo snippet

40ee93c

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: spell the splash hint descriptions the way the guide does

9c9727e

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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JavaScript port: loading screen with the app icon and light/dark colours - #6126

JavaScript port: loading screen with the app icon and light/dark colours#6126
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Flutter vs Codename One

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