iOS 27 tab bar: measured Liquid Glass motion, vibrancy, lens optics and native geometry by shai-almog · Pull Request #5906 · codenameone/CodenameOne

shai-almog · 2026-09-26T09:25:12Z

iOS 27 tab bar: measured Liquid Glass motion, vibrancy, lens optics and native geometry

The iOS 27 Tabs (tabsMorphPreset: "ios27") now reproduces the native UITabBarController from measurements instead of by eye: the selection motion, press/hold/drag gestures, vibrant content, the lifted glass lens and the bar's geometry.

Side by side, native on top and Codename One below, driven by the same real touches on the iOS 27 simulator (six taps, a held press, a tap on the selected tab, a slow drag and a flick):

docs/videos/tabs-side-by-side-light-bar.mp4
docs/videos/tabs-side-by-side-dark-bar.mp4

How it was measured

scripts/fidelity-app/ios-native-ref/motion-probe is an instrumented native app: a real UITabBarController driven by XCUITest with genuine taps, holds and drags, logging the presentation geometry of every layer under the bar on every display frame, plus KVC readback of the filters UIKit installs and lossless screenshots over known backdrops. scripts/fidelity-app/tools/tab-motion/tabmotion.py fits the model from those logs and regenerates every table in the Java sources byte for byte (fit, java, gesture, vibrancy, and their fixtures).

What changed

Motion (TabGlassMotion, TabGlassGesture)

The selection motion (lens travel, lift, deformation, platter fade, bar pulse, touch glow) as 60 Hz tables measured from UIKit.
Gestures: a held press keeps the lift and grows the bar on its press spring; a press on the selected tab lifts and pulses in place; dragging along the bar scrubs the lens after the finger (follow spring), and releasing selects the tab under the finger and settles there; every release ends in the measured wobble.

Rendering

New Graphics.colorMatrixRegion: recolours what is already painted under a shape and optional mask. Used for vibrant tab content (glyphs take their colour from the glass behind them, VibrancyMatrix: exact in dark, tabulated in light) and for the selection platter (the bar's own glass through UIKit's colour matrix).
New Graphics.glassLensRegion: the optics of the lifted lens (circular-bevel refraction that bends the surface around the rim into it, dispersion, outline, rim highlight, end shading, shadow), with the press brightening of the whole bar. Reference implementations in core (ColorMatrixBlend, GlassLensBlend).
Ports: JavaSE through the core reference; iOS and macOS on the GPU (Metal shaders); JavaScript port for colorMatrixRegion.
Native bar geometry in points (Display.getDevicePixelRatio()): 62 pt pill sized to its tabs (86 pt a tab), 21 pt from the screen edges, 94 x 54 pt resting lens; label font matched to the native ink widths.

Performance (iOS, Metal)

The bar glass (glassScreenRegion) now runs entirely on the GPU instead of a CPU blur with two GPU syncs per call; the output matches the CPU path (all 68 fidelity rows unchanged).
Drawing into a mutable image reuses its stencil texture instead of allocating a new one per pass.
The tab motion was painted twice per frame; Tabs.animate no longer asks the form to repaint the whole component.
The iOS lens scratch texture was leaked every frame; it is released.

Measured on the simulator, frames drawn in the first 0.6 s of a gesture went from about 11 of 36 to about 31 (native: about 33).

Tests and checks

New: TabGlassMotionTest, TabGlassGestureTest (replays 21 native holds and scrubs frame by frame), TabsGlassSelectionTest, VibrancyMatrixTest, ColorMatrixBlendTest; JS port parity and replay tests for the new op.
Full core unit suite, SpotBugs / PMD / Checkstyle (CI's quality report), native signatures, cast semantics, control characters and Vale pass locally.
iOS 27 fidelity: the TabsGlassMotion frame goldens are new and seeded; the baseline is updated. Only tab rows moved: Tabs dark 85.89, light 86.12; TabsGeom dark 93.67, light 92.99; TabOne dark 97.36, light 96.90. The other 62 rows are unchanged.
The iOS 27 screenshot goldens that show tabs (scripts/ios/screenshots-metal-27/Tabs*) will need reseeding from CI.

Known differences from native

The native lifted lens is slightly larger and taller.
The lens's rounded ends can pull in small dark fragments from further out than native does.
The native bar glass is more saturated.
The press brightening and the lens dispersion are tuned rather than fitted.
glassLensRegion is not implemented in the JavaScript port yet (the lens is drawn without its optics there).

🤖 Generated with Claude Code

…nd native geometry The iOS 27 Tabs (tabsMorphPreset ios27) now reproduces UITabBarController from measurements taken with an instrumented native probe (motion-probe) rather than by eye: - TabGlassMotion / TabGlassGesture: the selection motion as measured 60 Hz tables, plus held presses, a press on the selected tab, drag scrubbing with release to the tab under the finger, and the release wobble. - Graphics.colorMatrixRegion (vibrant tab content, the selection platter) and Graphics.glassLensRegion (the lifted lens's refraction, outline, rim and shadow), with core reference implementations, JavaSE, iOS/macOS Metal and (colorMatrixRegion) JavaScript port support. - Native bar geometry in points and the native label face. - iOS Metal: the bar glass runs on the GPU, mutable-image drawing reuses its stencil, the tab motion is no longer painted twice per frame, and the lens scratch texture is no longer leaked. - Tooling: tabmotion.py regenerates every table; record-ios-tabs-side-by-side.sh records native and Codename One side by side under the same real touches (docs/videos). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

github-actions · 2026-09-26T09:35:59Z

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)

shai-almog · 2026-09-26T09:38:32Z

Native fidelity (Android, Material 3)

54 pairs compared -- median 95.6%, worst 91.3% (FlatButton_pressed_dark), 25th pct 94.9%, mean 95.7%.

Distribution -- >=99%: 2 | 95-99%: 37 | 90-95%: 15 | <90%: 0

Component	State	Appearance	Material	Fidelity	SSIM	mean delta	Geometry
FlatButton	pressed	dark	normal	91.3%	0.899	3.10	ok
Tabs	normal	light	normal	92.3%	0.914	3.05	ok
Button	pressed	dark	normal	92.6%	0.949	4.32	ok
FlatButton	normal	dark	normal	93.2%	0.938	2.69	ok
Button	disabled	dark	normal	93.3%	0.928	2.20	ok
Button	pressed	light	normal	93.3%	0.952	3.68	ok
FlatButton	normal	light	normal	93.7%	0.941	2.29	ok
FlatButton	pressed	light	normal	93.8%	0.942	2.56	ok
FloatingActionButton	pressed	light	normal	94.4%	0.927	2.82	OFF (h 0.88)
RadioButton	normal	dark	normal	94.5%	0.963	2.19	ok
RadioButton	normal	light	normal	94.7%	0.964	1.85	ok
CheckBox	selected	dark	normal	94.7%	0.950	2.60	ok
RadioButton	selected	dark	normal	94.8%	0.963	2.42	ok
CheckBox	normal	dark	normal	94.9%	0.952	2.69	ok
Button	normal	dark	normal	94.9%	0.949	3.16	ok
CheckBox	normal	light	normal	95.0%	0.953	2.30	ok
Toolbar	normal	dark	normal	95.1%	0.906	1.60	ok
RaisedButton	pressed	dark	normal	95.2%	0.950	2.39	ok
CheckBox	disabled	dark	normal	95.2%	0.954	1.47	ok
CheckBox	disabled	light	normal	95.2%	0.956	1.34	ok
Tabs	normal	dark	normal	95.2%	0.913	3.65	ok
RadioButton	disabled	dark	normal	95.3%	0.963	1.18	ok
RadioButton	selected	light	normal	95.3%	0.964	1.84	ok
CheckBox	selected	light	normal	95.4%	0.952	2.06	ok
Switch	selected	light	normal	95.4%	0.966	1.59	ok
Switch	selected	dark	normal	95.5%	0.966	1.86	ok
RadioButton	disabled	light	normal	95.5%	0.966	1.08	ok
Switch	disabled	dark	normal	95.6%	0.961	0.85	ok
Dialog	normal	light	normal	95.7%	0.930	2.30	ok
RaisedButton	pressed	light	normal	95.8%	0.958	2.16	ok
Button	normal	light	normal	95.8%	0.953	2.46	ok
Dialog	normal	dark	normal	95.8%	0.932	2.30	ok
Switch	normal	light	normal	96.0%	0.961	1.45	ok
FloatingActionButton	normal	light	normal	96.1%	0.937	1.14	ok
FloatingActionButton	pressed	dark	normal	96.2%	0.951	2.45	ok
Switch	normal	dark	normal	96.2%	0.962	1.39	ok
TextField	disabled	dark	normal	96.2%	0.965	0.76	ok
RaisedButton	normal	dark	normal	96.4%	0.952	1.78	ok
Switch	disabled	light	normal	96.4%	0.970	0.61	ok
Button	disabled	light	normal	96.8%	0.960	1.06	ok
ProgressBar	normal	dark	normal	96.9%	0.967	2.03	OFF (h 1.50)
RaisedButton	disabled	dark	normal	97.0%	0.955	0.89	ok
FloatingActionButton	normal	dark	normal	97.1%	0.952	1.43	ok
ProgressBar	normal	light	normal	97.3%	0.974	1.53	OFF (h 1.50)
RaisedButton	disabled	light	normal	97.3%	0.961	0.79	ok
TextField	disabled	light	normal	97.3%	0.965	0.79	ok
RaisedButton	normal	light	normal	97.3%	0.961	1.40	ok
TextField	normal	dark	normal	97.6%	0.958	1.83	ok
TextField	normal	light	normal	97.6%	0.958	1.63	ok
Slider	normal	dark	normal	98.4%	0.990	0.87	ok
Toolbar	normal	light	normal	98.7%	0.974	1.28	ok
Slider	normal	light	normal	99.0%	0.991	0.47	ok
Slider	disabled	dark	normal	99.6%	0.993	0.22	ok
Slider	disabled	light	normal	99.6%	0.993	0.18	ok

Geometry vs native (bbox offset / size ratio / center offset / corner radius) -- gated separately from the visual score

Component	State	Appearance	bbox dx,dy (px)	w ratio	h ratio	center off (px)	radius native->cn1 (px)
FloatingActionButton	pressed	light	+0,+0	0.929	0.881	4.0	-
FloatingActionButton	normal	light	+0,+0	0.946	0.912	2.9	-
Button	pressed	dark	+0,+0	0.947	0.975	2.6	-
Button	disabled	dark	+0,+0	0.947	0.975	2.6	-
Button	pressed	light	+0,+0	0.947	0.975	2.6	-
Button	normal	dark	+0,+0	0.947	0.975	2.6	-
RaisedButton	pressed	dark	+0,+0	0.945	0.975	2.6	-
RaisedButton	pressed	light	+0,+0	0.945	0.975	2.6	-
Button	normal	light	+0,+0	0.947	0.975	2.6	-
RaisedButton	normal	dark	+0,+0	0.945	0.975	2.6	-
Button	disabled	light	+0,+0	0.947	0.975	2.6	-
RaisedButton	disabled	dark	+0,+0	0.945	0.975	2.6	-
RaisedButton	disabled	light	+0,+0	0.945	0.975	2.6	-
RaisedButton	normal	light	+0,+0	0.945	0.975	2.6	-
RadioButton	normal	dark	+1,+1	1.029	1.000	2.2	-
RadioButton	normal	light	+1,+1	1.029	1.000	2.2	-
RadioButton	selected	dark	+1,+1	1.029	1.000	2.2	-
RadioButton	disabled	dark	+1,+1	1.029	1.000	2.2	-
RadioButton	selected	light	+1,+1	1.029	1.000	2.2	-
Switch	selected	light	+0,+0	1.080	1.063	2.2	-
RadioButton	disabled	light	+1,+1	1.029	1.000	2.2	-
CheckBox	selected	dark	+1,+1	1.013	1.000	1.8	-
CheckBox	normal	dark	+1,+1	1.013	1.000	1.8	-
CheckBox	normal	light	+1,+1	1.013	1.000	1.8	-
CheckBox	disabled	dark	+1,+1	1.013	1.000	1.8	-
CheckBox	disabled	light	+1,+1	1.013	1.000	1.8	-
CheckBox	selected	light	+1,+1	1.013	1.000	1.8	-
Switch	selected	dark	+0,+0	1.060	1.031	1.6	-
Switch	disabled	dark	+0,-1	1.060	1.031	1.6	-
Dialog	normal	light	+0,+0	1.007	0.982	1.6	-
Dialog	normal	dark	+0,+0	1.007	0.982	1.6	-
Switch	normal	light	+0,-1	1.060	1.031	1.6	-
Switch	normal	dark	+0,-1	1.060	1.031	1.6	-
Switch	disabled	light	+0,-1	1.060	1.031	1.6	-
FloatingActionButton	pressed	dark	+0,+0	0.963	0.963	1.4	-
FloatingActionButton	normal	dark	+0,+0	0.963	0.963	1.4	-
Toolbar	normal	light	-1,+1	1.000	1.000	1.4	-
FlatButton	pressed	dark	+0,+0	0.977	0.975	1.1	-
FlatButton	normal	dark	+0,+0	0.977	0.975	1.1	-
FlatButton	normal	light	+0,+0	0.977	0.975	1.1	-
FlatButton	pressed	light	+0,+0	0.977	0.975	1.1	-
TextField	normal	dark	+0,+0	1.015	1.036	1.1	-
TextField	normal	light	+0,+0	1.015	1.036	1.1	-
Toolbar	normal	dark	+0,+0	1.000	1.032	1.0	-
ProgressBar	normal	dark	+0,+0	1.000	1.500	1.0	-
ProgressBar	normal	light	+0,+0	1.000	1.500	1.0	-
TextField	disabled	dark	+0,+0	1.015	1.018	0.7	-
TextField	disabled	light	+0,+0	1.015	1.018	0.7	-
Tabs	normal	light	+0,+1	1.000	0.984	0.5	-
Slider	normal	dark	+1,+0	0.996	1.000	0.5	-
Slider	normal	light	+1,+0	0.996	1.000	0.5	-
Tabs	normal	dark	+0,+0	1.000	1.000	0.0	-
Slider	disabled	dark	+0,+0	1.000	1.000	0.0	-
Slider	disabled	light	+0,+0	1.000	1.000	0.0	-

Side-by-side comparisons (worst first)

FlatButton_pressed_dark -- 91.25% fidelity (SSIM 0.8985) (no change)

Left: native widget. Right: Codename One render.
Tabs_normal_light -- 92.28% fidelity (SSIM 0.9140) (no change)

Left: native widget. Right: Codename One render.
Button_pressed_dark -- 92.61% fidelity (SSIM 0.9485) (no change)

Left: native widget. Right: Codename One render.
FlatButton_normal_dark -- 93.24% fidelity (SSIM 0.9381) (no change)

Left: native widget. Right: Codename One render.
Button_disabled_dark -- 93.26% fidelity (SSIM 0.9278) (no change)

Left: native widget. Right: Codename One render.
Button_pressed_light -- 93.34% fidelity (SSIM 0.9521) (no change)

Left: native widget. Right: Codename One render.
FlatButton_normal_light -- 93.72% fidelity (SSIM 0.9410) (no change)

Left: native widget. Right: Codename One render.
FlatButton_pressed_light -- 93.77% fidelity (SSIM 0.9424) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_pressed_light -- 94.44% fidelity (SSIM 0.9273) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_dark -- 94.46% fidelity (SSIM 0.9630) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_light -- 94.69% fidelity (SSIM 0.9643) (no change)

Left: native widget. Right: Codename One render.
CheckBox_selected_dark -- 94.71% fidelity (SSIM 0.9502) (no change)

Left: native widget. Right: Codename One render.
RadioButton_selected_dark -- 94.79% fidelity (SSIM 0.9630) (no change)

Left: native widget. Right: Codename One render.
CheckBox_normal_dark -- 94.93% fidelity (SSIM 0.9516) (no change)

Left: native widget. Right: Codename One render.
Button_normal_dark -- 94.94% fidelity (SSIM 0.9491) (no change)

Left: native widget. Right: Codename One render.
CheckBox_normal_light -- 95.03% fidelity (SSIM 0.9531) (no change)

Left: native widget. Right: Codename One render.
Toolbar_normal_dark -- 95.07% fidelity (SSIM 0.9059) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_dark -- 95.19% fidelity (SSIM 0.9501) (no change)

Left: native widget. Right: Codename One render.
CheckBox_disabled_dark -- 95.20% fidelity (SSIM 0.9538) (no change)

Left: native widget. Right: Codename One render.
CheckBox_disabled_light -- 95.21% fidelity (SSIM 0.9562) (no change)

Left: native widget. Right: Codename One render.
Tabs_normal_dark -- 95.23% fidelity (SSIM 0.9125) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_dark -- 95.29% fidelity (SSIM 0.9630) (no change)

Left: native widget. Right: Codename One render.
RadioButton_selected_light -- 95.33% fidelity (SSIM 0.9642) (no change)

Left: native widget. Right: Codename One render.
CheckBox_selected_light -- 95.37% fidelity (SSIM 0.9524) (no change)

Left: native widget. Right: Codename One render.
Switch_selected_light -- 95.37% fidelity (SSIM 0.9658) (no change)

Left: native widget. Right: Codename One render.
Switch_selected_dark -- 95.45% fidelity (SSIM 0.9656) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_light -- 95.46% fidelity (SSIM 0.9657) (no change)

Left: native widget. Right: Codename One render.
Switch_disabled_dark -- 95.57% fidelity (SSIM 0.9613) (no change)

Left: native widget. Right: Codename One render.
Dialog_normal_light -- 95.65% fidelity (SSIM 0.9300) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_light -- 95.78% fidelity (SSIM 0.9578) (no change)

Left: native widget. Right: Codename One render.
Button_normal_light -- 95.79% fidelity (SSIM 0.9528) (no change)

Left: native widget. Right: Codename One render.
Dialog_normal_dark -- 95.79% fidelity (SSIM 0.9322) (no change)

Left: native widget. Right: Codename One render.
Switch_normal_light -- 95.97% fidelity (SSIM 0.9612) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_normal_light -- 96.09% fidelity (SSIM 0.9367) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_pressed_dark -- 96.16% fidelity (SSIM 0.9513) (no change)

Left: native widget. Right: Codename One render.
Switch_normal_dark -- 96.17% fidelity (SSIM 0.9616) (no change)

Left: native widget. Right: Codename One render.
TextField_disabled_dark -- 96.21% fidelity (SSIM 0.9648) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_normal_dark -- 96.41% fidelity (SSIM 0.9516) (no change)

Left: native widget. Right: Codename One render.
Switch_disabled_light -- 96.43% fidelity (SSIM 0.9698) (no change)

Left: native widget. Right: Codename One render.
Button_disabled_light -- 96.80% fidelity (SSIM 0.9596) (no change)

Left: native widget. Right: Codename One render.
ProgressBar_normal_dark -- 96.91% fidelity (SSIM 0.9669) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_dark -- 97.02% fidelity (SSIM 0.9549) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_normal_dark -- 97.07% fidelity (SSIM 0.9521) (no change)

Left: native widget. Right: Codename One render.
ProgressBar_normal_light -- 97.26% fidelity (SSIM 0.9739) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_light -- 97.26% fidelity (SSIM 0.9611) (no change)

Left: native widget. Right: Codename One render.
TextField_disabled_light -- 97.29% fidelity (SSIM 0.9649) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_normal_light -- 97.32% fidelity (SSIM 0.9613) (no change)

Left: native widget. Right: Codename One render.
TextField_normal_dark -- 97.61% fidelity (SSIM 0.9583) (no change)

Left: native widget. Right: Codename One render.
TextField_normal_light -- 97.62% fidelity (SSIM 0.9582) (no change)

Left: native widget. Right: Codename One render.
Slider_normal_dark -- 98.39% fidelity (SSIM 0.9900) (no change)

Left: native widget. Right: Codename One render.
Toolbar_normal_light -- 98.69% fidelity (SSIM 0.9739) (no change)

Left: native widget. Right: Codename One render.
Slider_normal_light -- 98.95% fidelity (SSIM 0.9908) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_dark -- 99.56% fidelity (SSIM 0.9927) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_light -- 99.59% fidelity (SSIM 0.9932) (no change)

Left: native widget. Right: Codename One render.

shai-almog · 2026-09-26T09:45:13Z

Compared 172 screenshots: 172 matched.
Native Windows port (x64 / Intel-AMD): full hellocodenameone screenshot suite rendered offscreen with Direct2D/DirectWrite, plus the real benchmarks (base64 native/CN1/SIMD, image createMask/applyMask/modifyAlpha/PNG/JPEG, SSE2 SIMD kernels). 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 63ms / native 6ms = 10.5x speedup
SIMD float-mul (64K x300)	java 64ms / native 5ms = 12.8x 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	196.000 ms
Base64 CN1 decode	145.000 ms
Base64 SIMD encode	103.000 ms
Base64 encode ratio (SIMD/CN1)	0.526x (47.4% faster)
Base64 SIMD decode	98.000 ms
Base64 decode ratio (SIMD/CN1)	0.676x (32.4% faster)
Image encode benchmark iterations	100
Image createMask (SIMD off)	10.000 ms
Image createMask (SIMD on)	36.000 ms
Image createMask ratio (SIMD on/off)	3.600x (260.0% slower)
Image applyMask (SIMD off)	51.000 ms
Image applyMask (SIMD on)	91.000 ms
Image applyMask ratio (SIMD on/off)	1.784x (78.4% slower)
Image modifyAlpha (SIMD off)	51.000 ms
Image modifyAlpha (SIMD on)	33.000 ms
Image modifyAlpha ratio (SIMD on/off)	0.647x (35.3% faster)
Image modifyAlpha removeColor (SIMD off)	61.000 ms
Image modifyAlpha removeColor (SIMD on)	29.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.475x (52.5% faster)

shai-almog · 2026-09-26T09:45:46Z

Compared 157 screenshots: 157 matched.

Native Android coverage

📊 Line coverage: 9.37% (9331/99611 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
- Other counters: instruction 9.10% (47834/525841), branch 3.60% (1793/49819), complexity 3.57% (1898/53096), method 5.52% (1542/27918), class 11.04% (413/3742)
- Lowest covered classes
  - kotlin.collections.kotlin.collections.ArraysKt___ArraysKt – 0.00% (0/6367 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)
  - kotlin.collections.kotlin.collections.CollectionsKt___CollectionsKt – 0.00% (0/1187 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.MethodWriter – 0.00% (0/922 lines covered)
  - kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/736 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)
  - kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/625 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.Frame – 0.00% (0/570 lines covered)

✅ Native Android screenshot tests passed.

Native Android coverage

📊 Line coverage: 9.37% (9331/99611 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
- Other counters: instruction 9.10% (47834/525841), branch 3.60% (1793/49819), complexity 3.57% (1898/53096), method 5.52% (1542/27918), class 11.04% (413/3742)
- Lowest covered classes
  - kotlin.collections.kotlin.collections.ArraysKt___ArraysKt – 0.00% (0/6367 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)
  - kotlin.collections.kotlin.collections.CollectionsKt___CollectionsKt – 0.00% (0/1187 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.MethodWriter – 0.00% (0/922 lines covered)
  - kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/736 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)
  - kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/625 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.Frame – 0.00% (0/570 lines covered)

Benchmark Results

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	scalar fallback (no native SIMD)
SIMD int-add (64K x300)	java 201ms / native 252ms = 0.7x speedup
SIMD float-mul (64K x300)	java 166ms / native 83ms = 2.0x 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	89.000 ms
Base64 CN1 decode	84.000 ms
Base64 native encode	356.000 ms
Base64 encode ratio (CN1/native)	0.250x (75.0% faster)
Base64 native decode	270.000 ms
Base64 decode ratio (CN1/native)	0.311x (68.9% faster)
Image encode benchmark status	skipped (SIMD unsupported)

shai-almog · 2026-09-26T09:48:52Z

Compared 172 screenshots: 172 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 31ms / native 2ms = 15.5x speedup
SIMD float-mul (64K x300)	java 30ms / native 2ms = 15.0x 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	105.000 ms
Base64 CN1 decode	70.000 ms
Base64 SIMD encode	48.000 ms
Base64 encode ratio (SIMD/CN1)	0.457x (54.3% faster)
Base64 SIMD decode	42.000 ms
Base64 decode ratio (SIMD/CN1)	0.600x (40.0% faster)
Image encode benchmark iterations	100
Image createMask (SIMD off)	6.000 ms
Image createMask (SIMD on)	3.000 ms
Image createMask ratio (SIMD on/off)	0.500x (50.0% faster)
Image applyMask (SIMD off)	15.000 ms
Image applyMask (SIMD on)	17.000 ms
Image applyMask ratio (SIMD on/off)	1.133x (13.3% slower)
Image modifyAlpha (SIMD off)	18.000 ms
Image modifyAlpha (SIMD on)	42.000 ms
Image modifyAlpha ratio (SIMD on/off)	2.333x (133.3% slower)
Image modifyAlpha removeColor (SIMD off)	18.000 ms
Image modifyAlpha removeColor (SIMD on)	14.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.778x (22.2% faster)

github-actions · 2026-09-26T09:52:18Z

Cloudflare Preview

URL: https://pr-5906-website-preview.codenameone.pages.dev
Branch: pr-5906-website-preview

github-actions · 2026-09-26T09:54:12Z

✅ Continuous Quality Report

Test & Coverage

✅ Tests: 10005 total, 0 failed, 63 skipped
📊 Line coverage: 63.49% [HTML preview] [Download]
- Lowest covered classes
  - com.codename1.gaming.level.GameSceneView – 0.00%
  - com.codename1.crash.CrashProtection – 0.00%
  - com.codename1.payment.CommerceManager – 0.00%
  - com.codename1.wearable.WearableMessage – 0.00%
  - com.codename1.ui.plaf.GlassLensBlend – 0.00%
  - com.codename1.vr.VRView – 0.00%
  - com.codename1.appreview.RatingDialog – 0.00%
  - com.codename1.db.ManagedKeys – 0.00%
  - com.codename1.calendar.DefaultCalendarHttpTransport – 0.00%
  - com.codename1.security.Secrets – 0.00%

Static Analysis

SpotBugs [Report archive]
- ✅ ByteCodeTranslator: 0 findings (no issues)
- ✅ android: 0 findings (no issues)
- ✅ build-hint-catalog: 0 findings (no issues)
- ✅ build-hint-tools: 0 findings (no issues)
- ✅ codenameone-maven-plugin: 0 findings (no issues)
- ✅ core-unittests: 0 findings (no issues)
- ✅ ios: 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.

shai-almog · 2026-09-26T09:56:46Z

Compared 172 screenshots: 172 matched.
Native Windows port (arm64 / Apple Silicon - Arm): full hellocodenameone screenshot suite rendered offscreen with Direct2D/DirectWrite, plus the real benchmarks (base64 native/CN1/SIMD, image createMask/applyMask/modifyAlpha/PNG/JPEG, NEON SIMD kernels). 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 57ms / native 3ms = 19.0x speedup
SIMD float-mul (64K x300)	java 56ms / native 3ms = 18.6x 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	251.000 ms
Base64 CN1 decode	127.000 ms
Base64 SIMD encode	68.000 ms
Base64 encode ratio (SIMD/CN1)	0.271x (72.9% faster)
Base64 SIMD decode	67.000 ms
Base64 decode ratio (SIMD/CN1)	0.528x (47.2% 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)	25.000 ms
Image applyMask (SIMD on)	20.000 ms
Image applyMask ratio (SIMD on/off)	0.800x (20.0% faster)
Image modifyAlpha (SIMD off)	17.000 ms
Image modifyAlpha (SIMD on)	14.000 ms
Image modifyAlpha ratio (SIMD on/off)	0.824x (17.6% faster)
Image modifyAlpha removeColor (SIMD off)	55.000 ms
Image modifyAlpha removeColor (SIMD on)	14.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.255x (74.5% faster)

shai-almog · 2026-09-26T09:56:57Z

Compared 172 screenshots: 172 matched.
Native Linux port (x64), GTK3/Cairo/Pango, ParparVM bytecode-to-C (no JVM): the hellocodenameone screenshot suite rendered by a native ELF built + run on the GitHub x64 runner. Baseline: scripts/linux/screenshots.

shai-almog · 2026-09-26T09:57:03Z

Compared 172 screenshots: 172 matched.
Native Linux port (arm64), GTK3/Cairo/Pango, ParparVM bytecode-to-C (no JVM): the hellocodenameone screenshot suite rendered by a native ELF built + run on the GitHub arm64 runner. Baseline: scripts/linux/screenshots-arm.

shai-almog · 2026-09-26T10:14:37Z

Compared 193 screenshots: 193 matched.
✅ JavaScript-port screenshot tests passed.

shai-almog · 2026-09-26T10:16:21Z