www.pudn.com > ucosv2(GUI).rar > LCDP8666.c

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              µC/GUI is protected by international copyright laws. Knowledge of the
*              source code may not be used to write a similar product. This file may
*              only be used in accordance with a license and should not be redistributed
*              in any way. We appreciate your understanding and fairness.
*
---------------------------------------------------------------------- 
File        : LCD866.C 
Purpose     : Color conversion routines for 866 mode 
---------------------------END-OF-HEADER------------------------------ 
*/ 
 
#include            /* needed for definition of NULL */ 
#include "LCD_Protected.h"    /* inter modul definitions */ 
 
int LCD_Color2Index_8666(LCD_COLOR Color) { 
  int r,g,b,Index; 
  r = Color&255; 
  g = (Color>>8)&255; 
  b = Color>>16; 
/* Check if image is a gray scale ... */ 
	if ((r==g) && (g==b)) { 
    return 120+ (r+8)/17;  /* Convert into colors from 120 - 135*/ 
	} 
/* Convert into the 6*6*6 colors ... */ 
  r = (r*5+127)/255; 
  g = (g*5+127)/255; 
  b = (b*5+127)/255; 
  Index = r+6*g+36*b; 
  return (Index<108) ? Index : Index+40; 
} 
 
LCD_COLOR LCD_Index2Color_8666(int Index) { 
  unsigned int r,g; 
  U32 b; 
  /* 16 Gray scale range ? */ 
  if ((Index>=120) && (Index<136)) { 
    return (U32)0x111111 * (U32)(Index-120); 
	} 
  if (Index>=108) { 
    if (Index<148) 
			return 0;  /* Black for illegal indices */ 
		Index -= 40; 
	} 
  r = (Index%6)*(255/5); 
  g = ((Index/6)%6)*(255/5); 
  b = (Index/36)*(255/5); 
  return r+(g<<8)+((U32)b<<16); 
}