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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBitmapScaler_DEFINED
#define SkBitmapScaler_DEFINED
#include "SkBitmap.h"
#include "SkConvolver.h"
/** \class SkBitmapScaler
Provides the interface for high quality image resampling.
*/
class SK_API SkBitmapScaler {
public:
enum ResizeMethod {
RESIZE_BOX,
RESIZE_TRIANGLE,
RESIZE_LANCZOS3,
RESIZE_HAMMING,
RESIZE_MITCHELL,
RESIZE_FirstMethod = RESIZE_BOX,
RESIZE_LastMethod = RESIZE_MITCHELL,
};
/**
* Given already-allocated src and dst pixmaps, this will scale the src pixels using the
* specified resize-method and write the results into the pixels pointed to by dst.
*/
static bool Resize(const SkPixmap& dst, const SkPixmap& src, ResizeMethod method);
/**
* Helper function that manages allocating a bitmap to hold the dst pixels, and then calls
* the pixmap version of Resize.
*/
static bool Resize(SkBitmap* result, const SkPixmap& src, ResizeMethod method,
int dest_width, int dest_height, SkBitmap::Allocator* = nullptr);
};
#endif
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