118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
/*
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*********************************************************************************************************
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* uC/GUI
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* Universal graphic software for embedded applications
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*
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* (c) Copyright 2002, Micrium Inc., Weston, FL
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* (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
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*
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* µC/GUI is protected by international copyright laws. Knowledge of the
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* source code may not be used to write a similar product. This file may
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* only be used in accordance with a license and should not be redistributed
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* in any way. We appreciate your understanding and fairness.
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*
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----------------------------------------------------------------------
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File : LCDAA.c
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Purpose : Low level antialiasing routines.
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---------------------------END-OF-HEADER------------------------------
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*/
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#define LCD_C
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#include <stddef.h> /* needed for definition of NULL */
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#include "LCD.h"
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#include "GUI_Private.h"
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#include "LCD_Private.h"
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/*********************************************************************
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*
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* Defines
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*
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**********************************************************************
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*/
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#define RETURN_IF_Y_OUT() \
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if (y < GUI_Context.ClipRect.y0) \
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return; \
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if (y > GUI_Context.ClipRect.y1) \
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return;
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#define RETURN_IF_X_OUT() \
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if (x < GUI_Context.ClipRect.x0) return; \
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if (x > GUI_Context.ClipRect.x1) return;
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#define CLIP_X() \
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if (x0 < GUI_Context.ClipRect.x0) { x0 = GUI_Context.ClipRect.x0; } \
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if (x1 > GUI_Context.ClipRect.x1) { x1 = GUI_Context.ClipRect.x1; }
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#define CLIP_Y() \
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if (y0 < GUI_Context.ClipRect.y0) { y0 = GUI_Context.ClipRect.y0; } \
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if (y1 > GUI_Context.ClipRect.y1) { y1 = GUI_Context.ClipRect.y1; }
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/*********************************************************************
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*
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* Public code
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*
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**********************************************************************
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*/
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/*********************************************************************
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*
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* LCD_AA_MixColors
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*/
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LCD_COLOR LCD_AA_MixColors(LCD_COLOR Color, LCD_COLOR BkColor, U8 Intens) {
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/* Calc Color seperations for FgColor first */
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I32 R = (Color&0xff)*Intens;
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I32 G = (Color&0xff00)*Intens;
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I32 B = (Color&0xff0000)*Intens;
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/* Add Color seperations for BkColor */
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Intens = 15-Intens;
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R += (BkColor&0xff)*Intens;
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G += (BkColor&0xff00)*Intens;
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B += (BkColor&0xff0000)*Intens;
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R = (R/15)&0xff;
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G = (G/15)&0xff00;
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B = (B/15)&0xff0000;
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Color = R+G+B;
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return Color;
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}
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/*********************************************************************
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*
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* LCD_SetPixelAA
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*/
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void LCD_SetPixelAA(int x, int y, U8 Intens) {
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if (Intens == 0)
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return;
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RETURN_IF_Y_OUT();
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RETURN_IF_X_OUT();
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if (Intens >= 15) {
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LCDDEV_L0_SetPixelIndex(x,y, LCD_COLORINDEX);
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} else {
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LCD_COLOR Color = LCD_Index2Color(LCD_COLORINDEX);
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LCD_COLOR BkColor = LCD_GetPixelColor(x,y);
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Color = LCD_AA_MixColors(Color, BkColor, Intens);
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LCDDEV_L0_SetPixelIndex(x,y, LCD_Color2Index(Color));
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}
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}
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/*********************************************************************
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*
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* LCD_SetPixelAA_NoTrans
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*/
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void LCD_SetPixelAA_NoTrans(int x, int y, U8 Intens) {
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RETURN_IF_Y_OUT();
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RETURN_IF_X_OUT();
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if (Intens == 0) {
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LCDDEV_L0_SetPixelIndex(x,y, LCD_BKCOLORINDEX);
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} else if (Intens == 15) {
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LCDDEV_L0_SetPixelIndex(x,y, LCD_COLORINDEX);
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} else {
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LCD_COLOR Color = LCD_AA_MixColors(LCD_Index2Color(LCD_COLORINDEX),
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LCD_Index2Color(LCD_BKCOLORINDEX),
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Intens);
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LCDDEV_L0_SetPixelIndex(x,y,LCD_Color2Index(Color));
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}
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}
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/*************************** End of file ****************************/
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