www.pudn.com > UCGUI390a.rar > LCDP555.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        : LCDP555.C 
Purpose     : Color conversion routines 
---------------------------END-OF-HEADER------------------------------ 
*/ 
 
#include "LCD_Protected.h"    /* inter modul definitions */ 
 
/********************************************************************* 
* 
*       Defines 
* 
********************************************************************** 
*/ 
 
#define B_BITS 5 
#define G_BITS 5 
#define R_BITS 5 
 
#define R_MASK ((1 << R_BITS) -1) 
#define G_MASK ((1 << G_BITS) -1) 
#define B_MASK ((1 << B_BITS) -1) 
 
/********************************************************************* 
* 
*       Public code, 
* 
*       LCD_FIXEDPALETTE == 555, 32768 colors, 0BBBBBGGGGGRRRRR 
* 
********************************************************************** 
*/ 
/********************************************************************* 
* 
*       LCD_Color2Index_555 
*/ 
unsigned LCD_Color2Index_555(LCD_COLOR Color) { 
  int r,g,b; 
  r = (Color>> (8  - R_BITS)) & R_MASK; 
  g = (Color>> (16 - G_BITS)) & G_MASK; 
  b = (Color>> (24 - B_BITS)) & B_MASK; 
  return r + (g << R_BITS) + (b << (G_BITS + R_BITS)); 
} 
 
/********************************************************************* 
* 
*       LCD_Index2Color_555 
*/ 
LCD_COLOR LCD_Index2Color_555(int Index) { 
  unsigned int r,g,b; 
  /* Seperate the color masks */ 
  r = Index                                  & R_MASK; 
  g = (Index >> R_BITS)                      & G_MASK; 
  b = ((unsigned)Index >> (R_BITS + G_BITS)) & B_MASK; 
  /* Convert the color masks */ 
  r = r * 255 / R_MASK; 
  g = g * 255 / G_MASK; 
  b = b * 255 / B_MASK; 
  return r + (g<<8) + (((U32)b)<<16); 
} 
 
/********************************************************************* 
* 
*       LCD_GetIndexMask_555 
*/ 
unsigned LCD_GetIndexMask_555(void) { 
  return 0x7fff; 
} 
 
/*************************** End of file ****************************/