49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
#ifndef FG_GUI_COLOR_HXX
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#define FG_GUI_COLOR_HXX
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// forward decls
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class SGPropertyNode;
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class FGColor {
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public:
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FGColor() { clear(); }
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FGColor(float r, float g, float b, float a = 1.0f) { set(r, g, b, a); }
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FGColor(const SGPropertyNode *prop) { set(prop); }
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FGColor(FGColor *c) {
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if (c) set(c->_red, c->_green, c->_blue, c->_alpha);
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}
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inline void clear() { _red = _green = _blue = _alpha = -1.0f; }
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// merges in non-negative components from property with children <red> etc.
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bool merge(const SGPropertyNode *prop);
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bool merge(const FGColor *color);
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bool set(const SGPropertyNode *prop) { clear(); return merge(prop); };
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bool set(const FGColor *color) { clear(); return merge(color); }
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bool set(float r, float g, float b, float a = 1.0f) {
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_red = r, _green = g, _blue = b, _alpha = a;
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return true;
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}
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bool isValid() const {
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return _red >= 0.0 && _green >= 0.0 && _blue >= 0.0;
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}
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void print() const;
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inline void setRed(float red) { _red = red; }
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inline void setGreen(float green) { _green = green; }
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inline void setBlue(float blue) { _blue = blue; }
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inline void setAlpha(float alpha) { _alpha = alpha; }
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inline float red() const { return clamp(_red); }
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inline float green() const { return clamp(_green); }
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inline float blue() const { return clamp(_blue); }
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inline float alpha() const { return _alpha < 0.0 ? 1.0f : clamp(_alpha); }
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protected:
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float _red, _green, _blue, _alpha;
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private:
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float clamp(float f) const { return f < 0.0 ? 0.0f : f > 1.0 ? 1.0f : f; }
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};
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#endif
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