skia2/tools/SkBitmapRegionSampler.h
msarett a5783aeff0 Provides various implementations of Android's SkBitmapRegionDecoder.
Implements testing in DM for these implementations.

nanobench testing will follow after this.

TBR=scroggo
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/76f755e6d54a32f9887ad254ce59a3a62f28bde4

Review URL: https://codereview.chromium.org/1288963002
2015-09-08 15:35:32 -07:00

42 lines
1.1 KiB
C++

/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmap.h"
#include "SkBitmapRegionDecoderInterface.h"
#include "SkImageDecoder.h"
#include "SkTemplates.h"
/*
* This class aims to duplicate the current implementation of
* SkBitmapRegionDecoder in Android.
*/
class SkBitmapRegionSampler : public SkBitmapRegionDecoderInterface {
public:
/*
* Takes ownership of pointer to decoder
*/
SkBitmapRegionSampler(SkImageDecoder* decoder, int width, int height);
/*
* Three differences from the Android version:
* Returns a Skia bitmap instead of an Android bitmap.
* Android version attempts to reuse a recycled bitmap.
* Removed the options object and used parameters for color type and
* sample size.
*/
SkBitmap* decodeRegion(int start_x, int start_y, int width, int height,
int sampleSize, SkColorType prefColorType) override;
private:
SkAutoTDelete<SkImageDecoder> fDecoder;
typedef SkBitmapRegionDecoderInterface INHERITED;
};