src/kits/interface/ColorTools.cpp

   1 /*
   2 Open Tracker License
   3
   4 Terms and Conditions
   5
   6 Copyright (c) 1991-2000, Be Incorporated. All rights reserved.
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  12 of the Software, and to permit persons to whom the Software is furnished to do
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  15 The above copyright notice and this permission notice applies to all licensees
  16 and shall be included in all copies or substantial portions of the Software.
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  20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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  27 this Software without prior written authorization from Be Incorporated.
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  29 Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks
  30 of Be Incorporated in the United States and other countries. Other brand product
  31 names are registered trademarks or trademarks of their respective holders.
  32 All rights reserved.
  33 */
  34
  35 /*******************************************************************************
  36 /
  37 /       File:                   ColorTools.cpp
  38 /
  39 /   Description:    Additional experimental color manipulation functions.
  40 /
  41 /       Copyright 2000, Be Incorporated, All Rights Reserved
  42 /
  43 *******************************************************************************/
  44
  45 #include "ColorTools.h"
  46
  47 #if B_BEOS_VERSION <= B_BEOS_VERSION_MAUI
  48
  49 namespace BExperimental {
  50
  51 #if DEBUG
  52 #define DB_INLINE
  53 #else
  54 #define DB_INLINE inline
  55 #endif
  56
  57 static DB_INLINE void mix_color_func(rgb_color* target, const rgb_color other, uint8 amount)
  58 {
  59         target->red = (uint8)( ((int16(other.red)-int16(target->red))*amount)/255
  60                                                                 + target->red );
  61         target->green = (uint8)( ((int16(other.green)-int16(target->green))*amount)/255
  62                                                                 + target->green );
  63         target->blue = (uint8)( ((int16(other.blue)-int16(target->blue))*amount)/255
  64                                                                 + target->blue );
  65         target->alpha = (uint8)( ((int16(other.alpha)-int16(target->alpha))*amount)/255
  66                                                                 + target->alpha );
  67 }
  68
  69 static DB_INLINE void blend_color_func(rgb_color* target, const rgb_color other, uint8 amount)
  70 {
  71         const uint8 alphaMix = (uint8)( ((int16(other.alpha)-int16(255-target->alpha))*amount)/255
  72                                                                         + (255-target->alpha) );
  73         target->red = (uint8)( ((int16(other.red)-int16(target->red))*alphaMix)/255
  74                                                                 + target->red );
  75         target->green = (uint8)( ((int16(other.green)-int16(target->green))*alphaMix)/255
  76                                                                 + target->green );
  77         target->blue = (uint8)( ((int16(other.blue)-int16(target->blue))*alphaMix)/255
  78                                                                 + target->blue );
  79         target->alpha = (uint8)( ((int16(other.alpha)-int16(target->alpha))*amount)/255
  80                                                                 + target->alpha );
  81 }
  82
  83 static DB_INLINE void disable_color_func(rgb_color* target, const rgb_color background)
  84 {
  85         blend_color_func(target, background, 255-70);
  86 }
  87
  88 // --------------------------------------------------------------------------
  89
  90 rgb_color mix_color(rgb_color color1, rgb_color color2, uint8 amount)
  91 {
  92         mix_color_func(&color1, color2, amount);
  93         return color1;
  94 }
  95
  96 rgb_color blend_color(rgb_color color1, rgb_color color2, uint8 amount)
  97 {
  98         blend_color_func(&color1, color2, amount);
  99         return color1;
 100 }
 101
 102 rgb_color disable_color(rgb_color color, rgb_color background)
 103 {
 104         disable_color_func(&color, background);
 105         return color;
 106 }
 107
 108 }
 109
 110 #endif