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skia2/RELEASE_NOTES.txt
Leon Scroggins III a77f30c7db Reland "Split building encoding from decoding" 
This reverts commit 9d4b788807.
Copyright issue has been fixed in
https://skia-review.googlesource.com/c/skia/+/275998.

Original description:
Bug: skia:9756

In CanvasKit, a large part of the binary is for encoding. Clients
would be happier with a smaller binary and no webp/jpeg encoding. Make
this an option by splitting up the GN arguments.

Split SK_HAS_WEBP_LIBRARY into SK_CODEC_DECODES_WEBP (to match the
existing SK_CODEC_DECODES_RAW) and SK_ENCODE_WEBP. Same for JPEG and
PNG.

Update CanvasKit compile script to disable webp and jpeg encoding.
Update debugger compile script to disable all encoding.

Change IsPng signature to match other SkCodecs.

TBR=djsollen@google.com

Change-Id: Ic847bae0154e0a2922100b3f2ee14a077ee5635a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/276007
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
2020-03-09 20:21:19 +00:00

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Skia Graphics Release Notes
This file includes a list of high level updates for each milestone release.
* * *
Milestone 82
<Insert new notes here- top is most recent.>
* 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.
* * *
Milestone 81
* 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
* * *
Milestone 80
* For Vulkan backend, we now require that the VkDevice, Queue, and Instance outlive
either the destruction or abandoning of the GrContext. Additionally, all
GrBackendTextures created via GrContext::createBackendTexture calls must be deleted
before destroying or abandoning the GrContext.
https://review.skia.org/257921
* 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
* * *
Milestone 79
* SkTextBlob::Iter to discover the glyph indices and typefaces in each run
https://skia-review.googlesource.com/246296
* Added support for PQ and HLG transfer functions to SkColorSpace.
https://skia-review.googlesource.com/c/skia/+/249000
* Added new api on GrContext ComputeImageSize. This replaces the hold static helper
ComputeTextureSize.
https://skia-review.googlesource.com/c/skia/+/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
* * *
Milestone 78
* 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:
- Provide new factory API in include/effects/SkImageFilters
- Consolidated enum types to use SkTileMode and SkColorChannel
- Hide filter implementation classes
- Hide previously public functions on SkImageFilter that were intended for
internal use only
https://review.skia.org/230198
https://review.skia.org/230876
https://review.skia.org/231256
* 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
* Use GL_QCOM_TILED_RENDERING to explicitly discard stencil
* Added RELEASE_NOTES.txt file
https://review.skia.org/229760
* Implemented internal support for OpenGL tessellation.
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