src/apps/soundrecorder/DrawingTidbits.h

   1 /*
   2  * Copyright 2005, Jérôme Duval. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Inspired by SoundCapture from Be newsletter (Media Kit Basics: Consumers and Producers)
   6  */
   7
   8 #ifndef __DRAWING_TIBITS__
   9 #define __DRAWING_TIBITS__
  10
  11 #include <GraphicsDefs.h>
  12
  13 rgb_color ShiftColor(rgb_color , float );
  14
  15 bool operator==(const rgb_color &, const rgb_color &);
  16 bool operator!=(const rgb_color &, const rgb_color &);
  17
  18 inline uchar
  19 ShiftComponent(uchar component, float percent)
  20 {
  21         // change the color by <percent>, make sure we aren't rounding
  22         // off significant bits
  23         if (percent >= 1)
  24                 return (uchar)(component * (2 - percent));
  25         else
  26                 return (uchar)(255 - percent * (255 - component));
  27 }
  28
  29 inline rgb_color
  30 Color(int32 r, int32 g, int32 b, int32 alpha = 255)
  31 {
  32         rgb_color result;
  33         result.red = r;
  34         result.green = g;
  35         result.blue = b;
  36         result.alpha = alpha;
  37
  38         return result;
  39 }
  40
  41 const rgb_color kWhite = { 255, 255, 255, 255};
  42 const rgb_color kBlack = { 0, 0, 0, 255};
  43
  44 const float kDarkness = 1.06;
  45 const float kDimLevel = 0.6;
  46
  47 void ReplaceColor(BBitmap *bitmap, rgb_color from, rgb_color to);
  48 void ReplaceTransparentColor(BBitmap *bitmap, rgb_color with);
  49
  50 #endif
  51