2fbf1bc8c9
This CL enables us to set the default visibility of the symbols on Android to hidden. It is the intent that all of he SK_APIs that have been added to /src directies should be removed as soon as we can remove their callers within Android. Bug: b/31971097 Change-Id: Ic787f94df0fb0c2b8d941aa7095a12b317c4b5de Reviewed-on: https://skia-review.googlesource.com/49501 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Derek Sollenberger <djsollen@google.com>
93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkBitmapRegionDecoder_DEFINED
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#define SkBitmapRegionDecoder_DEFINED
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#include "SkBitmap.h"
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#include "SkBRDAllocator.h"
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#include "SkEncodedImageFormat.h"
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#include "SkStream.h"
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/*
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* This class aims to provide an interface to test multiple implementations of
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* SkBitmapRegionDecoder.
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*/
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class SK_API SkBitmapRegionDecoder {
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public:
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enum Strategy {
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kAndroidCodec_Strategy, // Uses SkAndroidCodec for scaling and subsetting
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};
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/*
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* @param data Refs the data while this object exists, unrefs on destruction
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* @param strategy Strategy used for scaling and subsetting
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* @return Tries to create an SkBitmapRegionDecoder, returns NULL on failure
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*/
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static SkBitmapRegionDecoder* Create(sk_sp<SkData>, Strategy strategy);
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/*
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* @param stream Takes ownership of the stream
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* @param strategy Strategy used for scaling and subsetting
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* @return Tries to create an SkBitmapRegionDecoder, returns NULL on failure
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*/
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static SkBitmapRegionDecoder* Create(
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SkStreamRewindable* stream, Strategy strategy);
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/*
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* Decode a scaled region of the encoded image stream
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*
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* @param bitmap Container for decoded pixels. It is assumed that the pixels
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* are initially unallocated and will be allocated by this function.
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* @param allocator Allocator for the pixels. If this is NULL, the default
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* allocator (HeapAllocator) will be used.
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* @param desiredSubset Subset of the original image to decode.
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* @param sampleSize An integer downscaling factor for the decode.
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* @param colorType Preferred output colorType.
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* New implementations should return NULL if they do not support
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* decoding to this color type.
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* The old kOriginal_Strategy will decode to a default color type
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* if this color type is unsupported.
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* @param requireUnpremul If the image is not opaque, we will use this to determine the
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* alpha type to use.
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* @param prefColorSpace If non-null and supported, this is the color space that we will
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* decode into. Otherwise, we will choose a default.
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*
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*/
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virtual bool decodeRegion(SkBitmap* bitmap, SkBRDAllocator* allocator,
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const SkIRect& desiredSubset, int sampleSize,
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SkColorType colorType, bool requireUnpremul,
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sk_sp<SkColorSpace> prefColorSpace = nullptr) = 0;
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virtual SkEncodedImageFormat getEncodedFormat() = 0;
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virtual SkColorType computeOutputColorType(SkColorType requestedColorType) = 0;
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virtual sk_sp<SkColorSpace> computeOutputColorSpace(SkColorType outputColorType,
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sk_sp<SkColorSpace> prefColorSpace = nullptr) = 0;
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int width() const { return fWidth; }
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int height() const { return fHeight; }
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virtual ~SkBitmapRegionDecoder() {}
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protected:
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SkBitmapRegionDecoder(int width, int height)
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: fWidth(width)
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, fHeight(height)
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{}
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private:
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const int fWidth;
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const int fHeight;
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};
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#endif
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