skia2/modules/canvaskit/CHANGELOG.md

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

• Added CanvasKit.MakeImageFromCanvasImageSource which takes either an HTMLImageElement, SVGImageElement, HTMLVideoElement, HTMLCanvasElement, ImageBitmap, or OffscreenCanvas and returns an SkImage. This function is an alternative to CanvasKit.MakeImageFromEncoded for creating SkImages when loading and decoding images. In the future, codesize of CanvasKit may be able to be reduced by removing image codecs in wasm, if browser APIs for decoding images are used along with CanvasKit.MakeImageFromCanvasImageSource instead of CanvasKit.MakeImageFromEncoded.
• Three usage examples of CanvasKit.MakeImageFromCanvasImageSource in core.spec.ts.
• Added support for asynchronous callbacks in perfs and tests.
• CanvasKit.SkPath.MakeFromVerbsPointsWeights and CanvasKit.SkPath.addVerbsPointsWeights for supplying many path operations (e.g. moveTo, cubicTo) at once.
• The object returned by CanvasKit.malloc now has a subarray method which works exactly like the normal TypedArray version. The TypedArray which it returns is also backed by WASM memory and when passed into CanvasKit will be used w/o copying the data (just like Malloc.toTypedArray).
• SkM44.setupCamera to return a 4x4 matrix which sets up a perspective view from a camera.

Changed

• In all places where color arrays are accepted (gradient makers, drawAtlas, and MakeSkVertices), You can now provide either flat Float32Arrays of float colors, Uint32Arrays of int colors, or 2d Arrays of Float32Array(4) colors. The one thing you should not pass is an Array of numbers, since canvaskit wouldn't be able to tell whether they're ints or floats without checking them all. The fastest choice for gradients is the flat Float32Array, the fastest choice for drawAtlas and MakeSkVertices is the flat Uint32Array.
• Color arrays may also be objects created with CanvasKit.Malloc

Fixed

• TextStyle.color can correctly be a Malloc'd Float32Array.

Deprecated

• CanvasKit.MakePathFromCmds has been renamed to CanvasKit.SkPath.MakeFromCmds. The alias will be removed in an upcoming release.

[0.16.2] - 2020-06-05

Fixed

• A bug where loading fonts (and other memory intensive calls) would cause CanvasKit to infrequently crash with TypeError: Cannot perform %TypedArray%.prototype.set on a neutered ArrayBuffer.
• Incorrectly freeing Malloced colors passed into computeTonalColors.

[0.16.1] - 2020-06-04

Fixed

• Colors are unsigned to be compatible with Flutter Web and previous behavior, not signed ints.

[0.16.0] - 2020-06-03

Added

• Support for wide-gamut color spaces DisplayP3 and AdobeRGB. However, correct representation on a WCG monitor requires that the browser is rendering everything to the DisplayP3 or AdobeRGB profile, since there is not yet any way to indicate to the browser that a canvas element has a non-sRGB color space. See color support example in extra.html. Only supported for WebGL2 backed surfaces.
• Added SkSurface.reportBackendType which returns either 'CPU' or 'GPU'.
• Added SkSurface.imageInfo which returns an ImageInfo object describing the size and color properties of the surface. colorSpace is added to ImageInfo everywhere it is used.
• CanvasKit.Free to explicitly clean up memory after CanvasKit.Malloc. All memory allocated with CanvasKit.Malloc must be released with CanvasKit.Free or it will be leaked. This can improve performance by reducing the copying of data between the JS and WASM side.
• CanvasKit.ColorAsInt, SkPaint.setColorComponents, SkPaint.setColorInt, SkCanvas.drawColorComponents, SkCanvas.drawColorInt for when clients want to avoid the overhead of allocating an array for color components and only need 8888 color.

Changed

• We now compile/ship with Emscripten v1.39.16.
• CanvasKit.MakeCanvasSurface accepts a new enum specifying one of the three color space and pixel format combinations supported by CanvasKit.
• all _Make*Shader functions now accept a color space argument at the end. leaving it off or passing null makes it behave as it did before, defaulting to sRGB
• SkPaint.setColor accepts a new color space argument, defaulting to sRGB.
• Fewer allocations required to send Color and Matrices between JS and WASM layer.
• All APIs that take a 1 dimensional array should also accept the object returned by Malloc. It is recommended to pass the Malloc object, as the TypedArray could be invalidated any time CanvasKit needs to allocate memory and needs to resize to accommodate.

Breaking

• CanvasKitInit(...) now directly returns a Promise. As such, CanvasKitInit(...).ready() has been removed.
• CanvasKit.MakeCanvasSurface no longer accepts width/height arguments to override those on the canvas element. Use the canvas element's width/height attributes to dictate the size of the drawing area, and use CSS width/height to set the size it will appear on the page (it is rescaled after drawing when css sizing applies).
• Memory returned by CanvasKit.Malloc will no longer be automatically cleaned up. Clients must use CanvasKit.Free to release the memory.
• CanvasKit.Malloc no longer directly returns a TypedArray, but an object that can produce them with toTypedArray(). This is to avoid "detached ArrayBuffer" errors: https://github.com/emscripten-core/emscripten/issues/6747

Fixed

• WebGL context is no longer created with "antialias" flag. Using "antialias" caused poor AA quality in Ganesh when trying to do coverage-based AA with MSAA unknowingly enabled. It also reduced performance.

[0.15.0] - 2020-05-14

Added

• Support for DOMMatrix on all APIs that take SkMatrix (i.e. arrays or Float32Arrays of length 6/9/16).
• setEdging and setEmbeddedBitmaps to SkFont. You can disable the ability to draw aliased fonts (and save some code size) with the compile.sh argument no_alias_font.

Removed

• Previously deprecated functions MakeSkDashPathEffect, MakeLinearGradientShader, MakeRadialGradientShader, MakeTwoPointConicalGradientShader, MakeSkCornerPathEffect, MakeSkDiscretePathEffect

Changed

• CanvasKit colors are now represented with a TypedArray of four floats.
• Calls to getError should be disabled. This may cause a performance improvement in some scenarios.

Removed

• SkPaint.setColorf is obsolete and removed. setColor accepts a CanvasKit color which is always composed of floats.
• localmatrix option for SkShader.Lerp and SkShader.Blend.

Deprecated

• SkCanvas.concat44 has been folded into concat (which now takes 3x2, 3x3, or 4x4 matrices). It will be removed soon.

Fixed

• Memory leak in paragraph binding code (https://github.com/flutter/flutter/issues/56938)
• Safari now properly uses WebGL1 instead of WebGL2 when WebGL2 is not available (skbug.com/10171).

[0.14.0] - 2020-03-18

Added

• SkShader.MakeSweepGradient
• SkCanvas.saveLayer can now be called with 1 argument (the paint). In this case the current effective clip will be used, as the current rect is assumed to be null.
• SkPaint.setAlphaf
• Clients can supply no_codecs to compile.sh to remove all codec encoding and decoded code. This can save over 100 kb compressed if codecs are not needed.

Deprecated

• MakeSkDashPathEffect will be removed soon. Calls can be replaced with SkPathEffect.MakeDash.
• MakeLinearGradientShader will be removed soon. Calls can be replaced with SkShader.MakeLinearGradient.
• MakeRadialGradientShader will be removed soon. Calls can be replaced with SkShader.MakeRadialGradient.
• MakeTwoPointConicalGradientShader will be removed soon. Calls can be replaced with SkShader.MakeTwoPointConicalGradient.

Fixed

• Shadows are properly draw on fillRect and strokeRect in the canvas2d emulation layer.
• Shadow offsets properly ignore the CTM in the canvas2d emulation layer.

Changed

• Stop compiling jpeg and webp encoders by default. This results in a 100kb binary size reduction. Clients that need these encoders can supply force_encode_webp or force_encode_jpeg to compile.sh.

Removed

• Removed inverse filltypes.
• Removed StrokeAndFill paint style.
• Removed TextEncoding enum (it was only used internally). All functions assume UTF-8.

[0.13.0] - 2020-02-28

Deprecated

• MakeSkCornerPathEffect will be removed soon. Calls can be replaced with SkPathEffect.MakeCorner.
• MakeSkDiscretePathEffect will be removed soon. Calls can be replaced with SkPathEffect.MakeDiscrete.

Added

• SkSurface.drawOnce for drawing a single frame (in addition to already existing SkSurface.requestAnimationFrame for animation logic).
• CanvasKit.parseColorString which processes color strings like "#2288FF"
• Particles module now exposes effect uniforms, which can be modified for live-updating.
• Experimental 4x4 matrices added in SkM44.
• Vector math functions added in SkVector.
• SkRuntimeEffect.makeShaderWithChildren, which can take in other shaders as fragmentProcessors.
• GrContext.releaseResourcesAndAbandonContext to free up WebGL contexts.
• A few methods on SkFont: setHinting, setLinearMetrics, setSubpixel.

Changed

• We now compile/ship with Emscripten v1.39.6.
• SkMatrix.multiply can now accept any number of matrix arguments, multiplying them left-to-right.
• SkMatrix.invert now returns null when the matrix is not invertible. Previously it would return an identity matrix. Callers must determine what behavior would be appropriate in this situation.
• In Canvas2D compatibility layer, the underlying SkFont will have setSubpixel(true).
• Bones are removed from Vertices builder

Fixed

• Support for .otf fonts (.woff and .woff2 still not supported).

[0.12.0] - 2020-01-22

Added

• SkFontMgr.countFamilies and SkFontMgr.getFamilyName to expose the parsed font names.

Changed

• SKP serialization/deserialization now available (can be disabled with the 'no_skp'). SkPicture.DEBUGONLY_saveAsFile renamed to SkPicture.saveAsFile and CanvasKit.MakeSkPicture is now exposed. SKP support is not shipped to npm builds. force_serialize_skp has been removed since it opt-out, not opt-in.

Fixed

• Bug that sometimes resulted in 'Cannot perform Construct on a neutered ArrayBuffer'
• Bug with SkImage.readPixels (skbug.com/9788)
• Bug with transparent colors in Canvas2d mode (skbug.com/9800)

[0.11.0] - 2020-01-10

Added

• A "Core" build that removes Fonts, the Skottie animation player, the Particles demo, and PathOps is available in bin/core/. It is about half the size of the "CoreWithFonts" build.
• Experimental Runtime shader available for custom builds.
• WebP support.
• SkAnimatedImage.getCurrentFrame which returns an SkImage.

Fixed

• CanvasKit.SaveLayerInitWithPrevious and CanvasKit.SaveLayerF16ColorType constants.
• Some compilation configurations, for example, those with no fonts or just one of particles/skottie.

Changed

• Small tweaks to compilation settings to reduce code size and linkage time.
• JS functions are no longer provided when the underlying c++ calls have been compiled out.

Removed

• SkShader.Empty
• Support for Type 1 Fonts. These are ancient and removing them saves about 135k of code size.

Breaking

• In an effort to reduce code size for most clients, npm now contains two CanvasKit builds. In bin/ there is the "CoreWithFonts" build that contains most functionality from 0.10.0. However, we no longer ship the Skottie animation player, nor the Particles demo. Further, PathOps are removed from this build MakePathFromOp, SkPath.op and SkPath.simplify. Clients who need any of those features are encouraged to create a custom build using compile.sh.
• SkPicture.DEBUGONLY_saveAsFile was accidentally included in release builds. It has been removed. Clients who need this in a release build (e.g. to file a bug report that only reproduces in release) should do a custom build with the force_serialize_skp flag given.

Deprecated

• SkCanvas.drawAnimatedImage will be renamed soon. Calls can be replaced with SkCanvas.drawImage and SkAnimatedImage.getCurrentFrame.

[0.10.0] - 2019-12-09

Added

• SkContourMeasureIter and SkContourMeasure as an alternative to SkPathMeasure.
• CanvasKit image decode cache helpers: getDecodeCacheLimitBytes(), setDecodeCacheLimitBytes(), and getDecodeCacheUsedBytes().
• SkShader.Blend, SkShader.Color, SkShader.Empty, SkShader.Lerp.

Changed

• The returned values from SkParagraph.getRectsForRange now have direction with value CanvasKit.TextDirection.

Fixed

• MakeImage properly in the externs file and can work with CanvasKit.Malloc.

[0.9.0] - 2019-11-18

Added

• Experimental CanvasKit.Malloc, which can be used to create a TypedArray backed by the C++ WASM memory. This can save a copy in some cases (e.g. SkColorFilter.MakeMatrix). This is an advanced feature, so use it with care.
• SkCanvas.clipRRect, SkCanvas.drawColor
• Blur, ColorFilter, Compose, MatrixTransform SkImageFilters. Can be used with SkPaint.setImageFilter.
• SkCanvas.saveLayer now takes 3 or 4 params to include up to bounds, paint, SkImageFilter, flags.
• SkPath.rArcTo, SkPath.rConicTo, SkPath.rCubicTo, SkPath.rLineTo, SkPath.rMoveTo, SkPath.rQuadTo. Like their non-relative siblings, these are chainable.
• Add width(), height(), reset(), getFrameCount() to SkAnimatedImage.
• SkCanvas.drawImageNine, SkCanvas.drawPoints and related PointMode enum.
• SkPath.addPoly
• SkPathMeasure.getSegment
• More information on SkParagraph API, eg. getLongestLine(), getWordBoundary, and others.

Deprecated

• CanvasKit.MakeBlurMaskFilter will be renamed/moved soon to CanvasKit.SkMaskFilter.MakeBlur.

Changed

• Use newer version of Freetype2 (Tracking Skia's DEPS now).
• Use newer versions of libpng and zlib (Tracking Skia's DEPS now).

Fixed

• null dereference when sometimes falling back to CPU.
• Actually ask WebGL for a stencil buffer.
• Can opt out of Paragraph API with no_paragraph passed into compile.sh or when using primitive_shaper.

[0.8.0] - 2019-10-21

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