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Add coordinated QR looks and pattern-aware logo placement - #300
Builds on the rendering improvements merged in #299.
Requested logos now stay visible. Auto placement keeps functional patterns intact, chooses a nearby area in the central third of the symbol, and sizes the knockout against the actual Reed–Solomon budget for each affected block. If the minimum logo cannot fit or the exported image cannot be verified, rendering throws a clear error. Version and correction-level upgrades are tried only when enabled by the caller.
The result reports the symbol, placement coordinates, logo size, touched blocks and remaining margins. CenterOverAlignment is an explicit option requiring native and independent decoder verification; a successful alignment overlay returns a warning. Rectangular artwork stays centred inside its allocated area, and HTML/SVG preserve supplied placement offsets.
The preset API adds twelve coordinated looks with light and dark-panel variants, editable appearance options and short suggested uses. Brand uses the same logo placement path. The showcase includes generated light/dark specimens, suggested uses and C# examples; the QR guide covers the new APIs and SVG behavior. The library gains no external decoder dependency.
Validation: 397 focused tests pass on the rebased .NET 10 candidate, including the inherited frame/alpha regressions. Before rebasing, the same Wave 2 contracts passed 386 tests on .NET 8 and .NET 10, and 338 on .NET Framework 4.7.2. All 40 gallery specimens recover the exact payload with native image validation and strict ZXing at full and half size. The 24 light/dark preset combinations also pass 216 size/rotation/blur observations with each decoder. All 24 website specimens pass native image validation and strict independent full/half reads. The website build and verification pass; two API-route warnings are expected before the separate API-docs generation step. Interactive page inspection, visual acceptance and physical phone/print checks remain pending.
Logo placement now resolves the protected quiet zone and target size through the standard renderer before allocating logo pixels. The result can return an independent copy of the resolved appearance options for another export format. Target-size regression coverage passes as part of 390 focused .NET 8 tests and 342 .NET Framework 4.7.2 tests; this includes exact 300px PNG/SVG sizing and rejection before overwriting a destination when a requested target is too small.
Local review findings are fixed and confirmed. This PR does not publish a package.
Summary by CodeRabbit
New Features
Added 12 coordinated QR appearance presets, with light- and dark-panel options.
Added logo fitting and rendering with placement budgets, optional encoding upgrades, and decode verification. Logo placement can also be customized with horizontal and vertical offsets.
Improved SVG and HTML support for QR appearance effects.
Documentation
Added examples and guidance for appearance presets, logo placement, and verification, including a gallery of preset designs.
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Commits
Reviewing files that changed from the base of the PR and between 0e43fd0 and 1c21364.
Files selected for processing: 3
Website/data/hero-presets.json
Website/tools/SiteSpecimens/Program.cs
Website/tools/SiteSpecimens/Specimens.Heroes.cs
Walkthrough
This PR adds QR logo budgeting and validated logo rendering, including placement offsets and optional independent-decoder checks. It also adds twelve hero presets, their light and dark variants, and supporting tests, documentation, and website specimens.
Changes: QR logo budgeting and codeword mapping
Layer / File(s)
Summary
Logo budget and codeword mapping CodeGlyphX/Rendering/Art/LogoPlacement.cs, CodeGlyphX/Rendering/Art/QrLogoBudget.cs, CodeGlyphX/Rendering/Art/QrLogoRenderOptions.cs, CodeGlyphX/Qr/QrCodewordLayout.cs, CodeGlyphX/QrArt.LogoBudget.cs, CodeGlyphX.Tests/QrLogoBudgetTests.cs
The new codeword layout maps QR modules to codewords and blocks. FitLogo searches pattern-free candidates and returns their per-block coverage and margins. Tests check fitting and decoding across QR versions and error-correction levels.
Logo rendering and verification
Layer / File(s)
Summary
Logo rendering and verification CodeGlyphX/Rendering/Art/QrLogoComposition.cs, CodeGlyphX/QrArt.LogoRendering.cs, CodeGlyphX/Rendering/Png/QrPngRenderer.*.cs, CodeGlyphX/Rendering/QrLogoOptions.cs, CodeGlyphX/Rendering/QrStyles/QrRasterLogoOptions.cs, CodeGlyphX/Rendering/Svg/*, CodeGlyphX/QrRenderOptions.cs, CodeGlyphX/QrRenderer.*.cs, CodeGlyphX.Tests/QrLogoPlacementTests.cs, CodeGlyphX.Tests/CodeGlyphX.Tests.csproj, README.md
RenderLogo renders a logo over a QR code or payload, checks visibility and decoding, and returns composition details. Alignment-pattern overlap requires an independent decoder. Logo offsets pass through PNG and SVG rendering paths, and tests cover placement, upgrades, target sizing, and output copies.
QrArt.Hero defines twelve presets with light and dark-panel variants. Tests check option independence and decoding. The specimen tool generates preset images and metadata for the website showcase.
sequenceDiagram
participant Caller
participant QrArt
participant QrCodewordLayout
participant QrPngRenderer
participant NativeDecoder
participant IndependentDecoder
Caller->>QrArt: RenderLogo with QR or payload and logo PNG
QrArt->>QrCodewordLayout: Calculate logo coverage budget
QrArt->>QrPngRenderer: Render logo composition
QrArt->>NativeDecoder: Validate rendered PNG
QrArt->>IndependentDecoder: Verify alignment placement when configured
QrArt-->>Caller: Return composition and verification details
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Possibly related PRs
EvotecIT/CodeGlyphX#299: Changes the target-size and quiet-zone rendering paths that this PR extends for logo positioning and rendering.
Merge Risk: Low · up to 0e43f
The Brand example may fail to compile when copied, and a flag-only hero generation command can write to the wrong location or fail. Both are bounded fixes; the PR is otherwise mergeable with owner awareness.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Docstring coverage is 19.23% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 52 functions across 22 files. (6 skipped:…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Title check
The title clearly and concisely summarizes the two primary changes: coordinated QR presets and pattern-aware logo placement.
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Check skipped because no linked issues were found for this pull request.
Full details: Docstring Coverage
Explanation
Docstring coverage is 19.23% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 52 functions across 22 files. (6 skipped: 6 unsupported.)
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Write docstrings for the functions missing them to satisfy the coverage threshold.
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❌ Patch coverage is 89.44282% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.71%. Comparing base (421a600) to head (1c21364).
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Actionable comments posted: 2
🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @Website/tools/SiteSpecimens/Program.cs:
- Line 13: Update the argument handling before HeroSpecimens.Render to select
the output directory only from non-option arguments, so --heroes-only alone uses
the default Website directory rather than being treated as a path.
Review comments at @Website/tools/SiteSpecimens/Specimens.Heroes.cs:
- Line 39: Qualify QrLogoRenderOptions in the generated Brand example in
Specimens.Heroes so it resolves with the documented import; keep the example’s
existing rendering behavior unchanged.
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Commits
Reviewing files that changed from the base of the PR and between 421a600 and 0e43fd0.
Files ignored due to path filters: 24
Website/static/assets/hero-presets/berry-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/berry-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/botanical-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/botanical-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/brand-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/brand-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/dotmatrix-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/dotmatrix-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/ink-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/ink-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/minimalline-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/minimalline-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/monoclassy-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/monoclassy-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/neon-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/neon-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/ocean-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/ocean-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/papercutout-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/papercutout-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/retropixel-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/retropixel-light.png is excluded by !**/*.png
Website/static/assets/hero-presets/sunset-dark.png is excluded by !**/*.png
Website/static/assets/hero-presets/sunset-light.png is excluded by !**/*.png
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Builds on the rendering improvements merged in #299.
Requested logos now stay visible. Auto placement keeps functional patterns intact, chooses a nearby area in the central third of the symbol, and sizes the knockout against the actual Reed–Solomon budget for each affected block. If the minimum logo cannot fit or the exported image cannot be verified, rendering throws a clear error. Version and correction-level upgrades are tried only when enabled by the caller.
The result reports the symbol, placement coordinates, logo size, touched blocks and remaining margins. CenterOverAlignment is an explicit option requiring native and independent decoder verification; a successful alignment overlay returns a warning. Rectangular artwork stays centred inside its allocated area, and HTML/SVG preserve supplied placement offsets.
The preset API adds twelve coordinated looks with light and dark-panel variants, editable appearance options and short suggested uses. Brand uses the same logo placement path. The showcase includes generated light/dark specimens, suggested uses and C# examples; the QR guide covers the new APIs and SVG behavior. The library gains no external decoder dependency.
Validation: 397 focused tests pass on the rebased .NET 10 candidate, including the inherited frame/alpha regressions. Before rebasing, the same Wave 2 contracts passed 386 tests on .NET 8 and .NET 10, and 338 on .NET Framework 4.7.2. All 40 gallery specimens recover the exact payload with native image validation and strict ZXing at full and half size. The 24 light/dark preset combinations also pass 216 size/rotation/blur observations with each decoder. All 24 website specimens pass native image validation and strict independent full/half reads. The website build and verification pass; two API-route warnings are expected before the separate API-docs generation step. Interactive page inspection, visual acceptance and physical phone/print checks remain pending.
Logo placement now resolves the protected quiet zone and target size through the standard renderer before allocating logo pixels. The result can return an independent copy of the resolved appearance options for another export format. Target-size regression coverage passes as part of 390 focused .NET 8 tests and 342 .NET Framework 4.7.2 tests; this includes exact 300px PNG/SVG sizing and rejection before overwriting a destination when a requested target is too small.
Local review findings are fixed and confirmed. This PR does not publish a package.
Summary by CodeRabbit