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Included review availability: Your plan provides up to 10 included reviews per hour; 1 remains after this review. WalkthroughThis PR adds the ChangesQR API
Merge Risk: 🔵 Low · up to The QR API is mergeable with owner awareness, but object-form colors still treat 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
Full details: Description checkExplanation The description explains the problem, implementation, scope, verification steps, tests, and follow-up limitations. It provides the information required by the template, although it uses Problem and Fix headings instead of the exact template headings. Comment |
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Updated 2:11 AM PT - Aug 29th, 2026
❌ @robobun, your commit bf7dacf has 1 failures in
🧪 To try this PR locally: bunx bun-pr 34108That installs a local version of the PR into your bun-34108 --bun |
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Is this PR alive? |
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@robobun Get this mergable. |
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Also @robobun should we support a version of this? Maybe in a followup PR? https://developer.mozilla.org/en-US/docs/Web/API/Barcode_Detection_API |
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On it. Pushing shortly with all five review items ( Re const d = new BarcodeDetector({ formats: ["qr_code"] });
const [{ rawValue, format, boundingBox, cornerPoints }] = await d.detect(imageBitmapSource);and |
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Beyond the inline findings: the two prior 🔴 issues from the July 14 review are addressed in this revision — parse_segments now uses a bounds-checked BitReader::take and range-checks alnum/numeric values before indexing ALNUM_CHARSET, and the format: "image" path guards dim_px² against codecs::DEFAULT_MAX_PIXELS before to_rgba allocates. Jarred's Bun.color / comptime-string-map feedback and alii's Bun.BufferSource typing note are also applied.
Extended reasoning...
This run re-examined the two panic/abort-on-user-input findings from the previous review pass and confirmed both are fixed: parse_segments now routes every bit read through BitReader::take, which returns DecodeError::InvalidStructure on overrun, and every alnum/numeric value is range-checked before array indexing (with unit tests in parse_segments_rejects_adversarial_input). The OutputFormat::Image arm now checks the combined pixel count against DEFAULT_MAX_PIXELS and throws RangeError before allocation. Recording this so a later pass doesn't re-derive it.
Bun.QR.generate(data, options?) encodes text or bytes as a QR code, returning the module matrix by default or SVG / terminal text / data-url / Bun.Image via the format option. String input auto-selects numeric / alphanumeric / byte mode; errorCorrection is boosted when it fits at the chosen version. Bun.QR.parse(matrix) decodes a module matrix back to its payload with Reed-Solomon error correction, so parse(generate(x)) round-trips and damaged matrices still decode up to the ECC capacity. The encoder is a port of Nayuki's qrcodegen reference (MIT). The format: "image" path rasterizes to a 2-color indexed PNG and moves the bytes into a Bun.Image via a new Image::from_owned_bytes_js helper, so the result chains directly into .webp().write() etc. without copying across the API boundary. Closes #34107
- light/dark go through the Bun.color parser (any CSS color, packed
number, [r,g,b,a] or {r,g,b,a}); extracted js_color_input_to_rgba
from js_function_color so both share one implementation
- errorCorrection and format options use comptime string maps
- parse: segment decoder is bounds-checked via a BitReader and
validates numeric/alphanumeric group values, so a crafted matrix
returns a TypeError instead of indexing out of bounds
- generate({format: "image"}): reject outputs over the image
pipeline's pixel cap before allocating the RGBA buffer
- generate/parse: build the typed array last so its throw scope is
checked by the host_fn epilogue (CI x64-asan caught this)
- types: accept Bun.BufferSource, light/dark typed as Bun.ColorInput
Segment constructors now check the character count against the v40-L capacity before allocating the bit buffer, so generate() on a huge buffer or string throws RangeError instead of allocating 8x the input. make_segments checks the numeric bound first so the mode-classification scans are bounded too. Also gives make_eci a real error variant and tightens two bare toThrow() assertions.
Host fns and the Image helper drop pub now that unreachable_pub is denied workspace-wide; the unused make_eci constructor goes away; the alphanumeric lookups use a table instead of slice::contains/position.
- Bun.color's number/array/object/string input handling now lives in one helper (js_color_input_to_css_color) used by both Bun.color and Bun.QR, so alpha rounding and error behavior cannot drift; the dead never-populated Log path in Bun.color goes with it - integer options go through validate_integer_range: non-numbers and non-integers throw instead of silently falling back to defaults - format / errorCorrection accept exactly the names the types declare - PNG output goes through codecs::encode with named options - mode-specific Segment constructors are crate-private; the unused InvalidVersionInfo variant is removed; decoder gets negative tests for unrecoverable format info and damage past ECC capacity - tests: invert asserts the glyph swap, oversized-input case uses 1 MiB
…counts - docs/runtime/qr.mdx documents generate() and parse(); every snippet was run against this build. Linked from bun-apis.mdx, docs.json and the README like the sibling APIs. - mask and parse()'s size go through optional_int_option: NaN now means "not set" (automatic mask, size inferred from the matrix), the same inputs that give the other integer options their defaults. Before, NaN became Some(0): mask 0 was forced and parse() rejected the matrix. - The data-too-long error names the bits the input needs and the bits the largest allowed symbol holds. When the character count did not fit the count field at maxVersion the old message reported i64::MAX; the bit count is now computed without that check. - The pixel-cap error says the image dimensions and which options to reduce. The msg field of RangeErrorOptions is only rendered when no bound is set, so the previous hint text never reached the user. - bun_qr exports SIZE_MIN/SIZE_MAX; the decoder and the binding use them instead of repeating 21 and 177. The InvalidSize message also names the matrix length condition.
…dark Bun.color accepts currentColor, light-dark() and the system color keywords, but they have no RGB value outside a document, so the old "must be a color accepted by Bun.color" message was wrong for them. color_option now parses with js_color_input_to_css_color and flattens with RGBA::try_from_css_color itself, and each step has its own message. That leaves js_color_input_to_rgba without a caller, so it is removed. Tests pin both messages, null light/dark falling back to the defaults, and null integer options being rejected like any other non-number.
… parser The call site of js_color_input_to_css_color is a match with the body in its Some arm, at the depth it had inside the Ok arm before. The hunk is the extraction only: 87 lines added, 118 removed, no whitespace change.
Encoder: - Penalty rule 3 counts the quiet zone as light area next to the first run of a row or column, as the reference does. The automatic mask now matches Nayuki's qrcodegen on every sampled input (884 of 884, matrix included). Before, 444 of 856 picked a different mask. - String objects are encoded like primitive strings: the mode choice follows the parsed StringOrBuffer variant. Decoder: - The function-pattern map and the mask formulas come from the encoder instead of a second copy. Image output: - The Bun.Image source is a 1-bit indexed PNG with light and dark as its two palette entries, written by the new codec_png::encode_bilevel. No RGBA raster and no quantizer run on the JS thread. The median-cut quantizer blended the two colors (black came out as (50, 50, 50)), and the raster plus deflate took 678 ms for a 3480 px image in a release build. It takes 10 ms now. - Image::from_clipboard calls Image::from_owned_bytes_js. SVG output: - Alpha is a fill-opacity attribute. SVG 1.1 has no #rrggbbaa form. Options: - boostErrorCorrection: null and invert: null keep the default, like the enum and color options. Tests: the automatic mask is pinned to the reference for four inputs, parse round-trips every size class up to version 40, the delivered PNG is decoded and every pixel checked against the matrix for the defaults, a custom dark color and a transparent light color, and String objects are covered. Docs drop the two-color palette claim and use the corrected mask in the examples.
…ent walk, check Kanji ranges - JSUint8Array::from_bytes returns JsResult since #40410. generate() and parse() create the typed array with ? first, then fill the result object; the "put it last" ordering note is gone with the reason for it. - for_each_data_module walks the codeword placement order once for both draw_codewords and decode_matrix. - parse_segments rejects a Kanji value outside 0x8140..=0x9FFC and 0xE040..=0xEBBF, the two ranges the mode encodes, instead of emitting bytes that are not Shift-JIS. Unit tests cover the gap and the boundary.
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Pushed f72f7cf, rebased onto current main (no conflicts) with one fix and two review items:
On the rebased build: The previous build's only hard failure, |
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Actionable comments posted: 4
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Inline comments:
In `@packages/bun-types/bun.d.ts`:
- Line 1157: Add test coverage for Bun.QR.parse using both ArrayBuffer and
DataView inputs, alongside the existing Uint8Array case. Keep the parse
declaration and implementation unchanged, and verify both forms are accepted and
produce the expected ParseResult.
In `@src/css_jsc/color_js.rs`:
- Around line 271-274: Update the alpha extraction around object color parsing
to check whether property “a” is present and numeric without using get_truthy,
so an explicit value of 0 is converted through object_alpha_to_u8 and preserved
as transparent. Retain the opaque fallback when the property is missing or
non-numeric, and keep the existing NaN behavior unless an explicit guard is
required by the surrounding contract.
In `@src/runtime/api/QRObject.rs`:
- Around line 122-123: Update int_option and optional_int_option to treat a
retrieved null value as absent before calling
JSGlobalObject::validate_integer_range, so mask and size use their defaults
without throwing while existing numeric validation remains unchanged.
In `@test/js/bun/qr/qr.test.ts`:
- Around line 324-329: Replace the color-case loop in the QR test with the
project-required describe.each() parameterization, giving each case a
descriptive name and preserving the existing generate, PNG decode, and
whole-image assertions unchanged so all cases run independently.
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Cargo.tomlREADME.mddocs/docs.jsondocs/runtime/bun-apis.mdxdocs/runtime/qr.mdxpackages/bun-types/bun.d.tssrc/css/values/color.rssrc/css_jsc/color_js.rssrc/css_jsc/lib.rssrc/jsc/bindings/BunObject+exports.hsrc/jsc/bindings/BunObject.cppsrc/qr/Cargo.tomlsrc/qr/lib.rssrc/runtime/Cargo.tomlsrc/runtime/api.rssrc/runtime/api/BunObject.rssrc/runtime/api/QRObject.rssrc/runtime/image/Image.rssrc/runtime/image/codec_png.rstest/js/bun/qr/qr.test.ts
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…uffer and DataView input
One helper decides whether an option is set. Absent, undefined and null all keep the default for the integer, boolean and color options. Pin an explicit a: 0 object color as transparent in the tests.
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Review follow-up, in be935cf and bf7dacf:
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4 participants
Closes #34107.
Problem
qrcodeandjsqrfrom npm.Fix
Bun.QR.generate(data, options?)encodes a string (numeric, alphanumeric or byte mode, picked by content) or aBufferSource(byte mode).formatselects the output:"object"(default:{version, size, errorCorrection, mask, matrix}),"svg","text"(half-block terminal art),"data-url", or"image"(aBun.Imageyou can chain into.resize().webp().write()).Bun.QR.parse(matrixOrQRCode)decodes a module matrix back to{text, bytes, version, errorCorrection, mask}with Reed-Solomon correction, soparse(generate(x)).text === xand a lightly damaged matrix still decodes.bun_qrcrate (src/qr/), plus a matrix decoder. Output is bit-identical to the reference for 869 sampled inputs (version, level, mask and every module).parsedecodes 917 reference matrices, including multi-segment and ECI streams at every mask and version 1 to 40.test/js/bun/qr/qr.test.ts(52 tests). Alsotest/js/bun/css/color.test.ts,test/js/bun/image/image.test.ts,cargo test -p bun_qr(12), the source lints, and the exception checker. Self-reviewed: 10 concerns raised, 10 addressed (see Notes).Background
version1 to 40 sets the side (4*version + 17). The error-correction level sets how many codewords are parity.BarcodeDetector-shaped API on top ofparseis the natural follow-up.format: "image"writes a 1-bit indexed PNG withlightanddarkas its two palette entries and hands it toBun.Image.Bun.Imagedecodes and re-encodes the source on output, so the bytes a caller gets are a truecolor PNG. A raw-pixelImagesource (image: add composite(), .pixels(), and raw pixel input #31670) would skip that round trip and is the fast path to adopt once it lands.Notes
Options.
errorCorrection(L/M/Q/H, raised when free unlessboostErrorCorrection: false),minVersion/maxVersion,mask,border,scale,light/dark(anythingBun.coloraccepts),invert. Integer options go throughvalidate_integer_range:undefined,nullorNaNmeans unset, any other non-number or a fractional value throwsTypeError, out of range throwsRangeError. One helper (option_value) decides what "unset" means for every option.formatanderrorCorrectionaccept exactly the names the types declare. Data that does not fit throws aRangeErrorthat names the bits needed and the bits the largest allowed symbol holds. The image pixel cap names the dimensions and the options to reduce.Bun.color. The input handling of
Bun.color(packed number,[r,g,b(,a)],{r,g,b(,a)}, CSS string) moves intobun_css_jsc::js_color_input_to_css_color.Bun.colorand thelight/darkoptions both call it. The body ofBun.coloris unchanged and stays at its indentation, so the hunk is the extraction only. The never-populatedLogthatBun.colorconsulted on parse failure is removed. A color that parses but has no fixed value (currentColor,light-dark(), system colors) gets its own error.Self review of 3937867, all addressed in the follow-up commits:
format: "image"ran the RGBA raster through the median-cut quantizer withcolors: 2. The quantizer blends the minority color (black came out as(50, 50, 50), tracked forBun.Imagein Bun.Image: do not split one colour across two palette boxes in median cut #40433), andBun.Imagere-encoded the result anyway. The source is now a 1-bit indexed PNG written from the module matrix, no quantizer and no RGBA raster on the JS thread. A test decodes the delivered PNG and checks that every pixel is exactlylightordarkin the matrix layout.new String(...)input was encoded in byte mode. The mode choice now follows the parsedStringOrBuffervariant.color_js.rshunk re-indented theBun.colorbody (298+/370-). It is 87+/118- now with no whitespace change.version="1.1"but wrote alpha as#rrggbbaa. Alpha is afill-opacityattribute now.boostErrorCorrection: nullmeantfalse.nullkeeps the default like the enum and color options.Image::from_clipboardduplicated the body ofImage::from_owned_bytes_jsand calls it now.parseround trips at every size class up to version 40, the automatic mask is pinned to the reference for four inputs, and the image test above.Not changed. A non-object
optionsargument is ignored, likeBun.markdownandBun.Imagedo.textfor a Kanji-mode symbol is the Shift-JIS bytes decoded as UTF-8;byteshas the payload.Sync cost of
format: "image"(release build, same machine). With the RGBA raster: 3 ms at the default 232 px, 678 ms at 3480 px, 110 ms for a version-40 symbol at the default scale. With the 1-bit source: 0.4 ms, 10 ms and 6 ms. The worker-side decode and re-encode thatBun.Imagedoes on output is unchanged.Follow-up review.
JSUint8Array::from_bytesreturnsJsResultsince #40410, so the typed arrays are created with?before the result objects are filled. The encoder and the decoder share one codeword-placement traversal (for_each_data_module). The Kanji branch of the segment parser rejects 13-bit values outside the two Shift-JIS ranges the mode covers (0x8140..=0x9FFC, 0xE040..=0xEBBF) instead of emitting them.parseis tested withArrayBufferandDataViewinput. Integer options treatnullas unset, which the boolean, enum and color options already did and whichBun.spawnandfetchdo for their integer options.[review] gate passed · iteration 4 · 21 files touched
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