axmol/extensions/GUI/CCControlExtension/CCControlUtils.cpp

/****************************************************************************
Copyright (c) 2012 cocos2d-x.org
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

https://adxeproject.github.io/

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#include "CCControlUtils.h"

NS_CC_EXT_BEGIN

Sprite* ControlUtils::addSpriteToTargetWithPosAndAnchor(const char* spriteName, Node* target, Vec2 pos, Vec2 anchor)
{
    Sprite* sprite = Sprite::createWithSpriteFrameName(spriteName);

    if (!sprite)
        return nullptr;

    sprite->setPosition(pos);
    sprite->setAnchorPoint(anchor);
    target->addChild(sprite);

    return sprite;
}

HSV ControlUtils::HSVfromRGB(RGBA value)
{
    HSV out;
    double min, max, delta;

    min = value.r < value.g ? value.r : value.g;
    min = min < value.b ? min : value.b;

    max = value.r > value.g ? value.r : value.g;
    max = max > value.b ? max : value.b;

    out.v = max;  // v
    delta = max - min;
    if (max > 0.0)
    {
        out.s = (delta / max);  // s
    }
    else
    {
        // r = g = b = 0                        // s = 0, v is undefined
        out.s = 0.0;
        out.h = -1;  // its now undefined (don't know if setting to NAN is a good idea)
        return out;
    }
    if (value.r >= max)  // > is bogus, just keeps compilor happy
    {
        out.h = (value.g - value.b) / delta;  // between yellow & magenta
    }
    else
    {
        if (value.g >= max)
            out.h = 2.0 + (value.b - value.r) / delta;  // between cyan & yellow
        else
            out.h = 4.0 + (value.r - value.g) / delta;  // between magenta & cyan
    }

    out.h *= 60.0;  // degrees

    if (out.h < 0.0)
        out.h += 360.0;

    return out;
}

RGBA ControlUtils::RGBfromHSV(HSV value)
{
    double hh, p, q, t, ff;
    long i;
    RGBA out;
    out.a = 1;

    if (value.s <= 0.0)  // < is bogus, just shuts up warnings
    {
        if (std::isnan(value.h))  // value.h == NAN
        {
            out.r = value.v;
            out.g = value.v;
            out.b = value.v;
            return out;
        }

        // error - should never happen
        out.r = 0.0;
        out.g = 0.0;
        out.b = 0.0;
        return out;
    }

    hh = value.h;
    if (hh >= 360.0)
        hh = 0.0;
    hh /= 60.0;
    i  = (long)hh;
    ff = hh - i;
    p  = value.v * (1.0 - value.s);
    q  = value.v * (1.0 - (value.s * ff));
    t  = value.v * (1.0 - (value.s * (1.0 - ff)));

    switch (i)
    {
    case 0:
        out.r = value.v;
        out.g = t;
        out.b = p;
        break;
    case 1:
        out.r = q;
        out.g = value.v;
        out.b = p;
        break;
    case 2:
        out.r = p;
        out.g = value.v;
        out.b = t;
        break;

    case 3:
        out.r = p;
        out.g = q;
        out.b = value.v;
        break;
    case 4:
        out.r = t;
        out.g = p;
        out.b = value.v;
        break;
    case 5:
    default:
        out.r = value.v;
        out.g = p;
        out.b = q;
        break;
    }
    return out;
}

Rect ControlUtils::RectUnion(const Rect& src1, const Rect& src2)
{
    Rect result;

    float x1 = MIN(src1.getMinX(), src2.getMinX());
    float y1 = MIN(src1.getMinY(), src2.getMinY());
    float x2 = MAX(src1.getMaxX(), src2.getMaxX());
    float y2 = MAX(src1.getMaxY(), src2.getMaxY());

    result.origin = Vec2(x1, y1);
    result.size   = Size(x2 - x1, y2 - y1);
    return result;
}

NS_CC_EXT_END