/*
 * Copyright 2006, Haiku. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Stephan Aßmus <superstippi@gmx.de>
 */

#ifndef SUPPORT_H
#define SUPPORT_H

#include <Rect.h>

// constrain
inline void
constrain(float& value, float min, float max)
{
        if (value < min)
                value = min;
        if (value > max)
                value = max;
}

#ifdef __i386__

// constrain_int32_0_255_asm
inline int32
constrain_int32_0_255_asm(int32 value) {
        asm("movl  $0,    %%ecx\n\t"
                "movl  $255,  %%edx\n\t"
                "cmpl  %%ecx, %%eax\n\t"
                "cmovl %%ecx, %%eax\n\t"
                "cmpl  %%edx, %%eax\n\t"
                "cmovg %%edx, %%eax"
                : "=a" (value)
                : "a" (value) 
                : "%ecx", "%edx" );
        return value;
}

#define constrain_int32_0_255 constrain_int32_0_255_asm

#else

inline int32
constrain_int32_0_255_c(int32 value)
{
        return max_c(0, min_c(255, value));
}

#define constrain_int32_0_255 constrain_int32_0_255_c

#endif

// rect_to_int
inline void
rect_to_int(BRect r,
                        int32& left, int32& top, int32& right, int32& bottom)
{
        left = (int32)floorf(r.left);
        top = (int32)floorf(r.top);
        right = (int32)ceilf(r.right);
        bottom = (int32)ceilf(r.bottom);
}


# endif // SUPPORT_H