include/private/SkOpts.h

/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkOpts_DEFINED
#define SkOpts_DEFINED

#include "SkTypes.h"
#include "SkXfermode.h"

struct ProcCoeff;

namespace SkOpts {
    // Call to replace pointers to portable functions with pointers to CPU-specific functions.
    // Thread-safe and idempotent.
    // Called by SkGraphics::Init(), and automatically #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS.
    void Init();

    // Declare function pointers here...

    // Returns a fast approximation of 1.0f/sqrtf(x).
    extern float (*rsqrt)(float);

    // See SkUtils.h
    extern void (*memset16)(uint16_t[], uint16_t, int);
    extern void (*memset32)(uint32_t[], uint32_t, int);

    // May return nullptr if we haven't specialized the given Mode.
    extern SkXfermode* (*create_xfermode)(const ProcCoeff&, SkXfermode::Mode);
}

#endif//SkOpts_DEFINED