lcdaa.c

MCB2300_ucgui_LCD320240.rar LPC2368的uc/gui的移植

/*
*********************************************************************************************************
*   											 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		: LCDAA.c
Purpose 	: Low level antialiasing routines.
---------------------------END-OF-HEADER------------------------------
*/

#define LCD_C

#include <stddef.h> 		  /* needed for definition of NULL */
#include "LCD.h"
#include "GUI_Private.h"
#include "LCD_Private.h"

/*********************************************************************
*
*   	Defines
*
**********************************************************************
*/

#define RETURN_IF_Y_OUT() \
  if (y < GUI_Context.ClipRect.y0)  				   \
	return; 										   \
  if (y > GUI_Context.ClipRect.y1)  				   \
	return;

#define RETURN_IF_X_OUT() \
  if (x < GUI_Context.ClipRect.x0) return;  		   \
  if (x > GUI_Context.ClipRect.x1) return;

#define CLIP_X() \
  if (x0 < GUI_Context.ClipRect.x0) { x0 = GUI_Context.ClipRect.x0; } \
  if (x1 > GUI_Context.ClipRect.x1) { x1 = GUI_Context.ClipRect.x1; }

#define CLIP_Y() \
  if (y0 < GUI_Context.ClipRect.y0) { y0 = GUI_Context.ClipRect.y0; } \
  if (y1 > GUI_Context.ClipRect.y1) { y1 = GUI_Context.ClipRect.y1; }

/*********************************************************************
*
*   	Public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	LCD_AA_MixColors
*/
LCD_COLOR LCD_AA_MixColors(LCD_COLOR Color, LCD_COLOR BkColor, U8 Intens)
{
	/* Calc Color seperations for FgColor first */
	I32 R = (Color&0xff) * Intens;
	I32 G = (Color&0xff00) * Intens;
	I32 B = (Color&0xff0000) * Intens;
	/* Add Color seperations for BkColor */
	Intens = 15 - Intens;
	R += (BkColor & 0xff) * Intens;
	G += (BkColor & 0xff00) * Intens;
	B += (BkColor & 0xff0000) * Intens;
	R = (R / 15) & 0xff;
	G = (G / 15) & 0xff00;
	B = (B / 15) & 0xff0000;
	Color = R + G + B;
	return Color;
}

/*********************************************************************
*
*   	LCD_SetPixelAA
*/
void LCD_SetPixelAA(int x, int y, U8 Intens)
{
	if (Intens == 0)
	{
		return;
	}
	RETURN_IF_Y_OUT();
	RETURN_IF_X_OUT();
	if (Intens >= 15)
	{
		LCDDEV_L0_SetPixelIndex(x, y, LCD_COLORINDEX);
	}
	else
	{
		LCD_COLOR Color = LCD_Index2Color(LCD_COLORINDEX);
		LCD_COLOR BkColor = LCD_GetPixelColor(x, y);
		Color = LCD_AA_MixColors(Color, BkColor, Intens);
		LCDDEV_L0_SetPixelIndex(x, y, LCD_Color2Index(Color));
	}
}

/*********************************************************************
*
*   	LCD_SetPixelAA_NoTrans
*/
void LCD_SetPixelAA_NoTrans(int x, int y, U8 Intens)
{
	RETURN_IF_Y_OUT();
	RETURN_IF_X_OUT();
	if (Intens == 0)
	{
		LCDDEV_L0_SetPixelIndex(x, y, LCD_BKCOLORINDEX);
	}
	else if (Intens == 15)
	{
		LCDDEV_L0_SetPixelIndex(x, y, LCD_COLORINDEX);
	}
	else
	{
		LCD_COLOR Color = LCD_AA_MixColors(LCD_Index2Color(LCD_COLORINDEX), LCD_Index2Color(LCD_BKCOLORINDEX), Intens);
		LCDDEV_L0_SetPixelIndex(x, y, LCD_Color2Index(Color));
	}
}

/*************************** End of file ****************************/