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81 lines
3.1 KiB
C++
81 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsColor_h___
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#define nsColor_h___
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#include "nscore.h"
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class nsString;
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// A color is a 32 bit unsigned integer with four components: R, G, B
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// and A.
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typedef PRUint32 nscolor;
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// Make a color out of r,g,b values. This assumes that the r,g,b values are
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// properly constrained to 0-255. This also assumes that a is 255.
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#define NS_RGB(_r,_g,_b) \
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((nscolor) ((255 << 24) | ((_b)<<16) | ((_g)<<8) | (_r)))
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// Make a color out of r,g,b,a values. This assumes that the r,g,b,a
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// values are properly constrained to 0-255.
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#define NS_RGBA(_r,_g,_b,_a) \
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((nscolor) (((_a) << 24) | ((_b)<<16) | ((_g)<<8) | (_r)))
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// Extract color components from nscolor
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#define NS_GET_R(_rgba) ((PRUint8) ((_rgba) & 0xff))
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#define NS_GET_G(_rgba) ((PRUint8) (((_rgba) >> 8) & 0xff))
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#define NS_GET_B(_rgba) ((PRUint8) (((_rgba) >> 16) & 0xff))
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#define NS_GET_A(_rgba) ((PRUint8) (((_rgba) >> 24) & 0xff))
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// Translate a hex string to a color. Return true if it parses ok,
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// otherwise return false.
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// This accepts only 3, 6 or 9 digits
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extern "C" NS_GFX_(PRBool) NS_HexToRGB(const nsString& aBuf, nscolor* aResult);
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// Translate a hex string to a color. Return true if it parses ok,
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// otherwise return false.
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// This version accepts 1 to 9 digits (missing digits are 0)
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extern "C" NS_GFX_(PRBool) NS_LooseHexToRGB(const nsString& aBuf, nscolor* aResult);
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// Translate a color name to a color. Return true if it parses ok,
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// otherwise return false.
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extern "C" NS_GFX_(PRBool) NS_ColorNameToRGB(const nsString& aBuf, nscolor* aResult);
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// Weird color computing code stolen from winfe which was stolen
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// from the xfe which was written originally by Eric Bina. So there.
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extern "C" NS_GFX_(void) NS_Get3DColors(nscolor aResult[2], nscolor aColor);
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// To determin colors based on the background brightness
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extern "C" NS_GFX_(void) NS_GetSpecial3DColors(nscolor aResult[2],
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nscolor aBackgroundColor,
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nscolor aBorderColor);
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// Special method to brighten a Color and have it shift to white when
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// fully saturated.
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extern "C" NS_GFX_(nscolor) NS_BrightenColor(nscolor inColor);
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// Special method to darken a Color and have it shift to black when
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// darkest component underflows
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extern "C" NS_GFX_(nscolor) NS_DarkenColor(nscolor inColor);
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// Determins brightness for a specific color
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extern "C" NS_GFX_(int) NS_GetBrightness(PRUint8 aRed, PRUint8 aGreen, PRUint8 aBlue);
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#endif /* nsColor_h___ */
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