color_demolut.c

uc-gui.rar

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              礐/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        : COLOR_DemoLUT.c
Purpose     : Example demonstrating the use of LUT-functions
----------------------------------------------------------------------
*/

#include "gui.h"

/*******************************************************************
*
*                 Draws 13 color bars
*
********************************************************************
*/

void ShowColorBar(void) {
  int x0 = 60, y0 = 40, yStep = 15, i;
  int NumColors = LCD_GetDevCap(LCD_DEVCAP_NUMCOLORS);
  int xsize     = LCD_GetDevCap(LCD_DEVCAP_XSIZE) - x0;
  GUI_SetFont(&GUI_Font8x8);
  GUI_SetColor(GUI_WHITE);
  GUI_SetBkColor(GUI_BLACK); 
  #if (LCD_FIXEDPALETTE) 
    GUI_DispString("Fixed palette: ");
    GUI_DispDecMin(LCD_FIXEDPALETTE);
  #endif
  GUI_DispStringAt("Red",     0, y0 +      yStep);
  GUI_DispStringAt("Green",   0, y0 +  3 * yStep);
  GUI_DispStringAt("Blue",    0, y0 +  5 * yStep);
  GUI_DispStringAt("Grey",    0, y0 +  6 * yStep);
  GUI_DispStringAt("Yellow",  0, y0 +  8 * yStep);
  GUI_DispStringAt("Cyan",    0, y0 + 10 * yStep);
  GUI_DispStringAt("Magenta", 0, y0 + 12 * yStep);
  for (i = 0; i < xsize; i++) {
    U16 cs = (255 * (U32)i) / xsize;
    U16 x = x0 + i;;
    /* Red */
    GUI_SetColor(cs);
    GUI_DrawVLine(x, y0             , y0 +     yStep - 1);
    GUI_SetColor(0xff + (255 - cs) * 0x10100L);
    GUI_DrawVLine(x, y0 +      yStep, y0 + 2 * yStep - 1);
    /* Green */
    GUI_SetColor(cs<<8);
    GUI_DrawVLine(x, y0 +  2 * yStep, y0 + 3 * yStep - 1);
    GUI_SetColor(0xff00 + (255 - cs) * 0x10001L);
    GUI_DrawVLine(x, y0 +  3 * yStep, y0 + 4 * yStep - 1);
    /* Blue */
    GUI_SetColor(cs * 0x10000L);
    GUI_DrawVLine(x, y0 +  4 * yStep, y0 + 5 * yStep - 1);
    GUI_SetColor(0xff0000 + (255 - cs) * 0x101L);
    GUI_DrawVLine(x, y0 +  5 * yStep, y0 + 6 * yStep - 1);
    /* Gray */
    GUI_SetColor((U32)cs * 0x10101L);
    GUI_DrawVLine(x, y0 +  6 * yStep, y0 + 7 * yStep - 1);
    /* Yellow */
    GUI_SetColor(cs * 0x101);
    GUI_DrawVLine(x, y0 +  7 * yStep, y0 + 8 * yStep - 1);
    GUI_SetColor(0xffff + (255 - cs) * 0x10000L);
    GUI_DrawVLine(x, y0 +  8 * yStep, y0 + 9 * yStep - 1);
    /* Cyan */
    GUI_SetColor(cs * 0x10100L);
    GUI_DrawVLine(x, y0 +  9 * yStep, y0 + 10 * yStep - 1);
    GUI_SetColor(0xffff00 + (255 - cs) * 0x1L);
    GUI_DrawVLine(x, y0 + 10 * yStep, y0 + 11 * yStep - 1);
    /* Magenta */
    GUI_SetColor(cs * 0x10001);
    GUI_DrawVLine(x, y0 + 11 * yStep, y0 + 12 * yStep - 1);
    GUI_SetColor(0xff00ff + (255 - cs) * 0x100L);
    GUI_DrawVLine(x, y0 + 12 * yStep, y0 + 13 * yStep - 1);
  }
}

/*******************************************************************
*
*                 Modify the RGB-shares of all colors
*
********************************************************************
*/

static void ModifyLUT(int RFaktor, int GFaktor, int BFaktor) {
  int NumColors = LCD_GetDevCap(LCD_DEVCAP_NUMCOLORS);
  int i;
  for (i=0; i<NumColors; i++) {
    U32 Color = LCD_GetDevCap(LCD_DEVCAP_COLOR + i);
    U32 R = Color&0xff;
    U32 G = (Color>>8) &0xff;
    U32 B = (Color>>16)&0xff;
    /* Now modify color */
    R = (R * RFaktor) / 100; 
    G = (G * GFaktor) / 100; 
    B = (B * BFaktor) / 100; 
    /* Write modified color into lookup table */
    Color = R | (G<<8)| (B <<16);
    GUI_SetLUTEntry(i,Color);    
  }
}

/*******************************************************************
*
*                 Modify the RGB-shares of all colors
*
********************************************************************
*/

static void DemoLUT(void) {
  int i;
  /* First draw something */
  GUI_SetFont(&GUI_Font13HB_1);
  GUI_DispStringHCenterAt("emWinGSC-sample demonstrating\nLUT-modifications", 160, 0);
  ShowColorBar();
  while(1) {
    /* Reduce the red share */
    for (i=0; i<=100; i+=10) {
      ModifyLUT(100 - i, 100, 100);
      GUI_Delay(100);
    }
    GUI_Delay(500);
    /* Reduce the green share */
    for (i=0; i<=100; i+=10) {
      ModifyLUT(0, 100 - i, 100);
      GUI_Delay(100);
    }
    GUI_Delay(500);
    /* Reduce the blue share */
    for (i=0; i<=100; i+=10) {
      ModifyLUT(0, 0, 100 - i);
      GUI_Delay(100);
    }
    GUI_Delay(500);
    /* Restore initial values */
    LCD_InitLUT();
    GUI_Delay(500);
  }
}

/*******************************************************************
*
*                 main
*
********************************************************************
*/

void main(void) {
  GUI_Init();
  DemoLUT();
}