canvas_core 0.10.0

Pure-Dart canvas scene model, layout, geometry, serialization, and renderer-agnostic paint operations.

0.10.0

• Breaking: replace the NodeId alias with the shared ElementId identity type.
• Breaking: make TextMeasurer and ImageIntrinsics interface-only runtime contracts and remove image-intrinsic change notifications from core.
• Breaking: rename CoreServices.tm to textMeasurer and remove the forwarding text-measurement extension.
• Add CanvasImageAssetResolver for batch resolution of logical image sourceRef values into host-renderable sources and stable intrinsic metadata.
• Add collectSceneFontFamilies for renderer/resource preflight across nested and hidden text and font-backed icon nodes.
• Keep renderer-neutral scene preparation outside CanvasRenderPipeline; the pipeline continues to own deterministic scene computation and paint-op construction only.

0.9.0

• Breaking: normalize image backing sources into the document-local CanvasSceneDocument.assets registry.
• Breaking: replace ImageData.sourcePath with nullable assetId and make ImageData.size a required editable frame size.
• Add CanvasImageAsset with an opaque sourceRef and optional persisted intrinsic dimensions.
• Validate image asset records and image-to-asset references.

0.8.2

• Add encodeCanvasScene and decodeCanvasScene as the canonical external JSON boundary for CanvasSceneDocument values.
• Keep scene decoding separate from semantic document validation.

0.8.1

• Add deterministic, domain-neutral CanvasSceneDocument validation with stable machine-readable issue codes and JSON Pointer paths.
• Validate generic scene integrity including finite numeric values, established ranges, globally unique node IDs, neutral group-behavior envelopes, and recursively JSON-safe behavior data.
• Keep unknown group behavior types and versions valid so optional extension packages remain responsible for component semantics.
• Make the existing 80-character node-name limit Unicode-safe in both validation and NodeEditingX normalization.

0.8.0

• Breaking: replace the exported NodeMutations extension with NodeEditingX.
• Breaking: remove the public withId() and withChildren() node extension helpers. Structural identity and tree changes remain owned by scene-tree and rewrite operations.
• Keep withName(), withXf(), withHidden(), and withLocked() as the public immutable node-editing convenience API.

0.7.0

• Breaking: require explicit version and data values when constructing or deserializing GroupBehaviorRef.
• Remove implicit version 1 and empty-data defaults from behavior envelopes.

0.6.0

• Breaking: remove SceneRenderBuilder and defaultSceneRenderBuilder. Use a ScenePreparer for synchronous renderer-neutral scene transformation before calling CanvasRenderPipeline.build(), or call build() directly when no preparation is required.
• Breaking: expose one stable CanvasRenderPipeline.services bundle and remove CanvasRenderPipeline.createServices(). Preparation and final layout can now use the exact same CoreServices instance.
• Keep scene computation, paint-operation construction, content-bounds calculation, and RenderSnapshot creation exclusively in CanvasRenderPipeline.build().
• Breaking: remove the unused CanvasViewportPolicy and CanvasViewportSource APIs. Use CanvasViewportPlanner and select the bounds to fit explicitly.
• Breaking: make CanvasViewportPlanner.plan() return CanvasViewportTransform directly and remove CanvasViewportPlanResult.
• Breaking: remove computeViewportWithPadding. Use CanvasViewportPlanner.plan() with paddingPx, or call computeViewport directly for low-level viewport math.

0.5.0

• Breaking: remove TextMeasureCache and the textMeasureCache parameters from CoreServices, SceneRenderBuilder, defaultSceneRenderBuilder, CanvasRenderPipeline.createServices(), and CanvasRenderPipeline.build().
• Breaking: remove the deprecated CanvasRenderPipeline.buildCanonical() compatibility helper.
• Delegate text measurement directly to the host-provided TextMeasurer. Platform implementations are now responsible for their own caching strategy.

0.4.0

• Breaking: change TextData.letterSpacing and TextMeasurer.measure from int to double.
• Replace synthetic hair-space expansion with native logical-unit letter spacing while preserving the original text.
• Add letterSpacing to DrawTextOp.
• Remove spacedText, measureSpaced, and measureSpacedText.
• Existing non-zero spacing values now use the new native semantics.

0.3.0

• Breaking: remove the unused label named parameter from History.reduce.
• Breaking: remove the unused label named parameter from History.withPresent.
• History behavior and stored state are unchanged; labels were previously accepted but ignored.

0.2.2

• Add CanvasFields.iconRef as the shared field identity for an icon's reference value.

0.2.1

• Add CanvasFieldKey, CanvasFields, and CanvasFieldKeyConverter as a shared runtime field identity API.

0.2.0

• Breaking: replace the scene background color model with CanvasFill via backgroundFill.
• Support no-fill, solid, and gradient canvas backgrounds.
• Add package licensing details for the public release.

0.1.1

• Fix internal layout imports to avoid resolving duplicate canvas_core types.
• Move image/icon layout payload types into a shared internal layout payload file.

0.1.0

• Initial open-source release of canvas_core.