CanvasKit Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

  • CanvasKit.MakeAnimatedImageFromEncoded, SkCanvas.drawAnimatedImage.
  • CanvasKit.SkFontMgr.FromData which takes several ArrayBuffers of font data, parses them, reading the metadata (e.g. family names) and stores them into a SkFontMgr.
  • SkParagraph as an optional set of APIs for dealing with text layout.

Changed

  • The no_font compile option should strip out more dead code related to fonts.
  • and no_embedded_font option now allows creating a SkFontMgr.FromData instead of always having an empty one.
  • Updated to emscripten 1.38.47
  • Switch to WebGL 2.0, but fall back to 1.0 when unavailable - bug.skia.org/9052

Fixed

  • Null terminator bug in draw text - skbug.com/9314

[0.7.0] - 2019-09-18

Added

  • SkCanvas.drawCircle(), SkCanvas.getSaveCount()
  • SkPath.offset(), SkPath.drawOval
  • SkRRect support (SkCanvas.drawRRect, SkCanvas.drawDRRect, CanvasKit.RRectXY). Advanced users can specify the 8 individual radii, if needed.
  • CanvasKit.computeTonalColors(), which returns TonalColors, which has an ambient SkColor and a spot SkColor.
  • CanvasKit.SkColorFilter and a variety of factories. SkPaint.setColorFilter is the only consumer of these at the moment.
  • CanvasKit.SkColorMatrix with functions .identity(), .scaled(), .concat() and others. Primarily for use with CanvasKit.SkColorFilter.MakeMatrix.

Changed

  • MakeSkVertices uses a builder to save a copy.

Breaking

  • When SkPath.arcTo is given seven arguments, it no longer turns the first four into a SkRect automatically, and instead uses them as arcTo(rx, ry, xAxisRotate, useSmallArc, isCCW, x, y) (see SkPath.h for more).

[0.6.0] - 2019-05-06

Added

  • SkSurface.grContext now exposed. GrContext has new methods for monitoring/setting the cache limits; tweaking these may lead to better performance in some cases. getResourceCacheLimitBytes, setResourceCacheLimitBytes, getResourceCacheUsageBytes
  • SkCanvas.drawAtlas for efficiently drawing multiple sprites from a sprite sheet with a set of transforms, color blends, etc.
  • SkColorBuilder, RSXFormBuilder, SkRectBuilder which increase performance by reducing the amount of malloc/free calls per frame, given that the array size is fixed.
  • Basic SkPicture support. SkSurface.captureFrameAsSkPicture is a helper function to capture an SkPicture, which can be dumped to disk (for debugging) with SkPicture.DEBUGONLY_saveAsFile.
  • SkImage.readPixels, which returns a TypedArray of pixel values (safe to use anywhere, doesn't need a delete()).

Changed

  • Better GrGLCaps support for WebGL - this shouldn't have any impacts on APIs or correctness, except by perhaps fixing a few bugs in various surface types.
  • Use unsigned ints for SkColor on the JS side - this shouldn't have any impacts unless clients have pre-computed colors, in which case, they will need to re-compute them.
  • [breaking] Moved CanvasKit.MakeImageShader to SkImage.makeShader - removed clampUnpremul as argument.

[0.5.1] - 2019-03-21

Added

  • SkPathMeasure, RSXFormBuilder, SkFont.getWidths, SkTextBlob.MakeFromRSXform which were needed to add the helper function SkTextBlob.MakeOnPath.
  • SkSurface.requestAnimationFrame - wrapper around window.requestAnimationFrame that takes care of the setup/tear down required to use CanvasKit optimally. The callback has an SkCanvas as the first parameter - callers should draw on that.

Changed

  • Location in Skia Git repo now modules/canvaskit (was experimental/canvaskit)

Fixed

  • Extern bug in CanvasKit.SkMatrix.invert
  • Fallback to CPU now properly refreshes the canvas to get access to the CanvasRenderingContext2D.
  • Compile flags for better WebGL1 support for some graphics cards.
  • Antialias bug on large oval paths https://crbug.com/skia/8873

Deprecated

  • SkCanvas.flush will be removed soon - client should only call SkSurface.flush

[0.5.0] - 2019-03-08

Added

  • isVolitile option to CanvasKit.MakeSkVertices. The previous (and current default) behavior was for this to be true; some applications may go faster if set to false.
  • SkCanvas.saveLayer(rect, paint)
  • SkCanvas.restoreToCount(int) which can be used with the output of .save() and .saveLayer().
  • Optional particles library from modules/particles. See CanvasKit.MakeParticles(json);
  • More public APIs for working with Surfaces/Contexts GetWebGLContext, MakeGrContext, MakeOnScreenGLSurface, MakeRenderTarget.
  • SkSurface.getSurface() and SkCanvas.getSurface() for making compatible surfaces (typically used as a workspace and then “saved” with surface.makeImageSnapshot())

Breaking

  • CanvasKit.MakeWebGLCanvasSurface no longer takes a webgl context as a first arg, only a canvas or an id of a canvas. If users want to manage their own GL contexts, they should build the SkSurface themselves with GetWebGLContext -> MakeGrContext -> MakeOnScreenGLSurface.

[0.4.1] - 2019-03-01

Added

  • Optional arguments to MakeManagedAnimation for supplying external assets (like images, fonts).

[0.4.0] - 2019-02-25

Added

  • SkPath.addRoundRect, SkPath.reset, SkPath.rewind exposed.
  • SkCanvas.drawArc, SkCanvas.drawLine, SkCanvas.drawOval, SkCanvas.drawRoundRect exposed.
  • Can import/export a SkPath to an array of commands. See CanvasKit.MakePathFromCmds and SkPath.toCmds.
  • SkCanvas.drawTextBlob() and SkCanvas.SkTextBlob.MakeFromText() to draw text to a canvas.
  • CanvasKit.TextEncoding enum. For use with SkTextBlob.
  • Text shaping with ShapedText object and SkCanvas.drawText. At compile time, one can choose between using Harfbuzz/ICU (default) or a primitive one (“primitive_shaper”) which just does line breaking. Using Harfbuzz/ICU substantially increases code size (4.3 MB to 6.4 MB).

Changed

  • SkCanvas.drawText() now requires an SkFont object for raw strings.

Removed

  • SkPaint.setTextSize(), SkPaint.getTextSize(), SkPaint.setTypeface() which should be replaced by using SkFont.
  • Deprecated CanvasKitInit().then() interface (see 0.3.1 notes)

Fixed

  • Potential bug in ready() if already loaded.

[0.3.1] - 2019-01-04

Added

  • SkFont now exposed.
  • MakeCanvasSurface can now take a canvas element directly.
  • MakeWebGLCanvasSurface can now take a WebGL context as an integer and use it directly.

Changed

  • CanvasKitInit(...).then() is no longer the recommended way to initialize things. It will be removed in 0.4.0. Use CanvasKitInit(...).ready(), which returns a real Promise.

Removed

  • SkPaint.measureText - use SkFont.measureText instead.

[0.3.0] - 2018-12-18

Added

  • Add Canvas2D JS layer. This mirrors the HTML Canvas API. This may be omitted at compile time it by adding no_canvas to the compile.sh invocation.
  • CanvasKit.FontMgr.DefaultRef() and fontmgr.MakeTypefaceFromData to load fonts.
  • Exposed SkPath.setVolatile. Some animations see performance improvements by setting their paths' volatility to true.

Fixed

  • SkPath.addRect now correctly draws counter-clockwise vs clockwise.

Changed

  • CanvasKit.MakeImageShader no longer takes encoded bytes, but an SkImage, created from CanvasKit.MakeImageFromEncoded. Additionally, the optional parameters clampIfUnpremul and localMatrix have been exposed.
  • SkPath.arcTo now takes startAngle, sweepAngle, forceMoveTo as additional parameters.
  • SkPath.stroke has a new option precision It defaults to 1.0.
  • CanvasKit comes with one font (NotoMono) instead of the Skia TestTypeface. Clients are encouraged to use the new fontmgr.MakeTypefaceFromData for more font variety.

Removed

  • CanvasKit.initFonts() - no longer needed.

[0.2.1] - 2018-11-20

Beginning of Changelog history