pdf_graphics 1.3.2

PDF content interpreter, device interface, font engine, shadings, ICC color, and text extraction — render pages to any device. Pure Dart, web-ready.

Changelog

1.3.2

• Version bump to keep the dart-pdf package suite aligned at 1.3.2. No graphics API changes since 1.3.1.

1.3.1

• Interpreter color-space handling now uses a shared resolved color-space path for fill and stroke colors, keeping calibrated, ICC, Indexed, Separation, and single-colorant DeviceN sc/SC resolution consistent.

1.2.3

• Version bump to keep the dart-pdf package suite aligned at 1.2.3. No graphics or interpreter changes since 1.2.2.

1.2.2

• The interpreter now checks for cancellation while walking a page's content so a render can be preempted mid-interpretation — used by the viewer's background render worker to drop superseded jobs on fast scrolls.

1.2.1

• Add a package example for pub.dev scoring.

1.2.0

• Search and text-extraction plumbing used by the standalone app's OCR and responsive viewer updates.
• Version bump to keep the dart-pdf package suite aligned at 1.2.0.

1.1.0

• Performance: a substantially faster interpreter: font-info caching, inlined path building, text-show memoization, a shared content-stream parse, and scan-only image collection. dart-pdf now renders faster than PDFium across the benchmark corpus.
• Background rendering: a record/replay split (PdfRenderCommand + RecordingDevice) captures a page's draw operations so interpretation can run off the UI thread. This is the pure-Dart foundation for the editor's background-isolate and Web Worker render backends.
• Reflow: PdfReflowPage now exposes items: text blocks and images interleaved in reading order (PdfReflowItem/PdfReflowImage, with the blocks/images/text getters unchanged). The extractor records placed images with their page-space bounds and folds each into the read where it sits, drops decorative rules and tiny icons, and de-duplicates repeated watermarks. Bullet and numbered list items are split into their own blocks (PdfReflowBlock.isListItem) instead of folding into the prose.
• Fonts: CJK CMap decoders for EUC-JP, GBK, Big5, and UHC charsets, so more non-embedded CJK text renders and stays selectable.
• Patterns: tiling-pattern color approximation when a glyph's font is substituted.
• Fix: JPEG 2000 tile-part desynchronization, and indexed Lab color palettes now decode correctly.

1.0.0

First stable release. Changes since 0.1.0:

• Color: Lab, CalGray, and CalRGB CIE-based color spaces; calibrated Separation/DeviceN alternate spaces; Indexed color; and pure-Dart DeviceCMYK JPEG decoding for correct print-color rendering.
• Fonts: a Type 1 parser; CFF improvements (seac accented-glyph composition, encoding supplements, per-FD font-matrix composition); TrueType post-table glyph-name lookup when there is no usable cmap; custom /Encoding and ZapfDingbats glyph resolution; vertical writing mode (Identity-V / WMode 1) for Type 0 fonts; and CJK CMap support for non-embedded Adobe-Japan1 and legacy GBK fonts.
• Transparency: isolated knockout groups (/K true); optional content groups (OCG) with visibility expressions for correct layer handling.
• Images: full-resolution /Mask stencils, and JBIG2 pattern dictionaries with halftone regions.
• Patterns: tiling-pattern and shading-pattern fills rendered through glyph outlines for text.
• Text: paragraph-aware reflow extraction for reading view; rotated text selection geometry.
• Robustness: pages with invalid bounding boxes fall back to valid geometry instead of collapsing.
• Document-AI seam: PdfDocumentContext.of(document) gathers a document's text, form fields, and annotations into a clean, serializable shape for a host-supplied language model, and PdfDocumentActionSink describes the editing actions an agent can drive. A thin adapter over the existing extraction/editing surface. The model and transport are host-provided.

0.1.0

Initial release.

• Content-stream interpreter covering the full operator set: paths, clipping, transparency groups, soft masks, blend modes, optional content, type 0-4 functions.
• Device interface: implement one class to render PDF pages anywhere.
• Font engine: Type 1, TrueType, CFF, Type 0/CID, Type 3; embedded and standard-14 metrics.
• Shadings 1-7 including mesh parsing; tiling and shading patterns.
• Color: ICC profiles (gray TRC, matrix/TRC, mft1/mft2/mAB LUTs), Separation/DeviceN, Indexed, Lab.
• Text extraction with selection geometry, search, and rotation-aware page geometry.
• Annotation appearance rendering and form-field appearance support.