This page includes a list of high level updates for each milestone release.
Removed drawBitmap and related functions from SkDevice; all public drawBitmap functions on SkCanvas automatically wrap the bitmap in an SkImage and call the equivalent drawImage function. Drawing mutable SkBitmaps will now incur a mandatory copy. Switch to using SkImage directly or mark the bitmap as immutable before drawing.
Removed “volatile” flag from SkVertices. All SkVertices objects are assumed to be volatile (the previous default behavior).
Removed exotic legacy bitmap functions from SkCanvas (drawBitmapLattic, drawBitmapNine); the exotic SkImage functions still exist.
Make it possible to selectively turn on/off individual encoders/decoders, using skia_use_(libpng/libjpeg_turbo/libwebp)(decode/encode).
Removed GrGpuResource, GrSurface, and GrTexture from public api. These were not meant to be public, and we now can move them into src. Also removed getTexture function from SkImage.h
Removed Bones from SkVertices
Added a field to GrContextOptions that controls whether GL errors are checked after GL calls that allocate textures, etc. It also controls checking for shader compile success, and program linking success.
Made SkDeferredDisplayList.h officially part of the public API (i.e., moved it to include/core). Also added a ProgramIterator to SkDeferredDisplayList which allows clients to pre-compile some of the shaders the DDL requires.
Added two new helper methods to SkSurfaceCharacterization: createBackendFormat and createFBO0. These make it easier for clients to create new surface characterizations that differ only a little from an existing surface characterization.
Removed SkTMax and SkTMin.
Removed SkTClamp and SkClampMax.
Removed SkScalarClampMax and SkScalarPin.
Removed SkMax32 and SkMin32.
Removed SkMaxScalar and SkMinScalar.
SkColorSetA now warns if the result is unused.
An SkImageInfo with a null SkColorSpace passed to SkCodec::getPixels() and related calls is treated as a request to do no color correction at decode time.
Add new APIs to add attributes to document structure node when creating a tagged PDF.
Remove CGFontRef parameter from SkCreateTypefaceFromCTFont. Use CTFontManagerCreateFontDescriptorFromData instead of CGFontCreateWithDataProvider to create CTFonts to avoid memory use issues.
Added SkCodec:: and SkAndroidCodec::getICCProfile for reporting the native ICC profile of an encoded image, even if it doesn't map to an SkColorSpace.
SkSurface::ReplaceBackendTexture takes ContentChangeMode as a parameter, which allow callers to specify whether retain a copy of the current content.
Enforce the existing documentation in SkCanvas::saveLayer that it ignores any mask filter on the restore SkPaint. The ‘coverage’ of a layer is ill-defined, and masking should be handled by pre-clipping or using the auxiliary clip mask image of the SaveLayerRec.
Added support for GL_NV_fence extension.
Make SkImageInfo::validRowBytes require rowBytes to be pixel aligned. This makes SkBitmap match the behavior of raster SkSurfaces in rejecting non-aligned rowBytes.
Added an SkImage::MakeRasterFromCompressed entry point. Also updated SkImage::MakeFromCompressed to decompress the compressed image data if the GPU doesn‘t support the specified compression type (i.e., macOS Metal doesn’t support BC1_RGB8_UNORM so such compressed images will always be decompressed on that platform).
Added support for BC1 RGBA compressed textures
Added CachingHint to SkImage::makeRasterImage
Added SkAnimatedImage::getCurrentFrame()
Add support to create an SkSurface from an MTKView, with delayed acquisition of the MTLDrawable. Entry point: SkSurface::MakeFromMTKView
Removed SkIRect::EmptyIRect(). Use SkIRect::MakeEmpty() instead. https://review.skia.org/262382/
Moved SkRuntimeEffect to public API. This is the new (experimental) interface to custom SkSL shaders and color filters.
Added BC1 compressed format support. Metal and Vulkan seem to only support the BC formats on desktop machines.
Added compressed format support for backend texture creation API. This adds the following new entry points: GrContext::compressedBackendFormat GrContext::createCompressedBackendTexture The latter method comes in variants that allow color-initialized and compressed texture data initialized.
Added SkMatrix::MakeTrans(SkIVector) https://review.skia.org/259804
Removed SkSize& SkSize::operator=(const SkISize&) https://review.skia.org/257880
SkISize width() and height() now constexpr https://review.skia.org/257680
Added SkMatrix::MakeTrans(SkVector) and SkRect::makeOffset(SkVector). https://review.skia.org/255782
Added SkImageInfo::MakeA8(SkISize) and added optional color space parameter to SkImageInfo::MakeN32Premul(SkISize).
Added dimensions() and getFrameCount() to SkAnimatedImage https://review.skia.org/253542
Removed SkMatrix44 version of toXYZD50 from SkColorSpace. Switched to skcms types in transferFn, invTrasnferFn, and gamutTransformTo functions. https://review.skia.org/252596
Removed rotation and YUV support from SkColorMatrix https://review.skia.org/252188
Added kBT2020_SkYUVColorSpace. This is BT.2020's YCbCr conversion (non-constant-luminance). https://review.skia.org/252160
Remove old async read pixels APIs https://review.skia.org/251198
Expose SkBlendModeCoeff and SkBlendMode_AsCoeff for Porter-Duff blend modes. https://review.skia.org/252600
SkTextBlob::Iter to discover the glyph indices and typefaces in each run https://review.skia.org/246296
Added support for PQ and HLG transfer functions to SkColorSpace. https://review.skia.org/249000
Added new api on GrContext ComputeImageSize. This replaces the hold static helper ComputeTextureSize. https://review.skia.org/247337
New versions of SkSurface async-rescale-and read APIs that allow client to extend the lifetime of the result data. Old versions are deprecated. https://review.skia.org/245457
Add SkColorInfo. It's dimensionless SkImageInfo. https://review.skia.org/245261
Added SkPixmap-based createBackendTexture method to GrContext. This allows clients to create backend resources (initialized with texture data) that Skia/Ganesh doesn't know about/track. https://review.skia.org/244676
Add explicit src and dst colorspace parameters to SkColorFilter::filterColor4f() https://review.skia.org/244882
Remove Vulkan/Metal float32 RGBA texture support https://review.skia.org/244881
Add SkSurface::MakeFromCAMetalLayer https://review.skia.org/242563
Added kAlpha_F16_SkColorType, kRG_F16_SkColorType and kRGBA_16161616_SkColorType. This is intended to help support HDR YUV uses case (e.g., P010 and P016). As such, the addition is focused on allowing creation of SkPixmaps and SkImages and not SkSurfaces (i.e., who wants to render to render to these?) https://review.skia.org/241357
Start to move nested SkPath types (e.g. Direction, Verb) up to root level in SkPathTypes.h https://review.skia.org/241079
Remove isRectContour and ksNestedFillRects from public https://review.skia.org/241078
Added kRG_88_SkColorType. This is intended to help support YUV uses case (e.g., NV12). As such, the addition is focused on allowing creation of SkPixmaps and SkImages and not SkSurfaces (i.e., who wants to render to RG?) https://review.skia.org/239930 https://review.skia.org/235797
Make the size of program/pipeline caches configurable via GrContextOptions::fRuntimeProgramCacheSize https://review.skia.org/239756
Added kAlpha_16_SkColorType and kRG_1616_SkColorType. This is intended to help support HDR YUV uses case (e.g., P010 and P016). As such, the addition is focused on allowing creation of SkPixmaps and SkImages and not SkSurfaces (i.e., who wants to render to render to these?) https://review.skia.org/239930
Add GrContext::precompileShader to allow up-front compilation of previously-cached shaders. https://review.skia.org/239438
Added RELEASE_NOTES.txt file https://review.skia.org/229760
SkDrawLooper is no longer supported in SkPaint or SkCanvas. https://review.skia.org/230579 https://review.skia.org/231736
SkPath::Iter::next() now ignores its consumDegenerates bools. Those will so go away entirely https://review.skia.org/235104
SkImage: new factories: DecodeToRaster, DecodeToTexture https://review.skia.org/234476
SkImageFilter API refactor started:
SkColorFilters::HSLAMatrix - new matrix color filter operating in HSLA space. https://review.skia.org/231736
Modify GrBackendFormat getters to not return internal pointers. Use an enum class for GL formats. https://review.skia.org/233160
Expose GrContext::dump() when SK_ENABLE_DUMP_GPU is defined. https://review.skia.org/233557
Vulkan backend now supports YCbCr sampler for I420 Vulkan images that are not backed by external images. https://review.skia.org/233776
Add SkCodec::SelectionPolicy for distinguishing between decoding a still image or an image sequence for a container format that has both (e.g. HEIF). https://review.skia.org/232839
SkImage::makeTextureImage and SkImage::MakeCrossContextFromPixmap no longer take an SkColorSpace parameter. It was unused. https://review.skia.org/234579 https://review.skia.org/234912
SkImage::reinterpretColorSpace - to reinterpret image contents in a new color space. https://review.skia.org/234328
Removed SkImage::MakeCrossContextFromEncoded. https://review.skia.org/234912
Add Metal support for GrFence, GrSemaphore, and GrBackendSemaphore https://review.skia.org/233416
SkMallocPixelRef: remove MakeDirect and MakeWithProc from API. https://review.skia.org/234660
Remove 4-parameter variant of SkRect::join() and intersect(), and noemptycheck variants of intersect(). https://review.skia.org/235832 https://review.skia.org/237142
Remove unused sk_sp comparison operators. https://review.skia.org/236942
Add SkColor4f variant to experimental_DrawEdgeAAQuad for SkiaRenderer. https://review.skia.org/237492
Deprecated maxCount resource cache limit for Ganesh. This hasn't been relevant for a long time.
Changed GrContextOptions' fDisallowGLSLBinaryCaching to fShaderCacheStrategy, and allow caching SkSL. https://review.skia.org/238856