guiaachar4.c

在ucos上实现了图形用户接口GUI；值得一看

/*
*********************************************************************************************************
*                                                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        : GUICharAA.C
Purpose     : Display antialiased
----------------------------------------------------------------------
Version-Date---Author-Explanation
----------------------------------------------------------------------

1.00.00 990922 RS     First release
----------------------------------------------------------------------
Known problems or limitations with current version
----------------------------------------------------------------------
Module needs cleanup and review, but is fully functional.
---------------------------END-OF-HEADER------------------------------
*/


#include "GUI_Private.H"

#include <stdio.h>
#include <string.h>

/*
      ***********************************************************
      *                                                         *
      *       Anti-aliased drawing                              *
      *                                                         *
      ***********************************************************
*/

static void Draw(int x0, int y0, int XSize, int YSize, int BytesPerLine, const U8*pData) {
  int x, y;
  tLCD_SetPixelAA* pfSetPixelAA;
  pfSetPixelAA = (GUI_Context.TextMode && GUI_TM_TRANS) ?
                 LCD_SetPixelAA : LCD_SetPixelAA_NoTrans;
  for (y=0; y<YSize; y++) {
    const U8*pData0 = pData;
    for (x=0; x<XSize-1; x+=2) {
      (*pfSetPixelAA)(x+x0,y0+y,   (*pData0)>>4); /* x0+x changed -> x+x0 to avoid problems with IAR's ICCMC80 */
      (*pfSetPixelAA)(x0+x+1,y0+y, (*pData0++)&15);
  	}
    if (XSize&1) {
      (*pfSetPixelAA)(x0+x,y0+y, (*pData0)&15);
    }
    pData+=BytesPerLine;
  }
}

/*
      ***********************************************************
      *                                                         *
      *       Font handling                                     *
      *                                                         *
      ***********************************************************
*/

static const GUI_FONT_PROP* GUIPROP_FindChar(const GUI_FONT_PROP* pProp, U16P c) {
  for (pProp = GUI_Context.pAFont->p.pProp; pProp; pProp=(const GUI_FONT_PROP*) pProp->pNext) {
    if ((c>=pProp->First) && (c<=pProp->Last))
      break;
  }
  return pProp;
}

void GUIPROP_AA4_DispChar(U16P c) {
  int BytesPerLine;
  GUI_DRAWMODE DrawMode = GUI_Context.TextMode;
  const GUI_FONT_PROP* pProp = GUIPROP_FindChar(GUI_Context.pAFont->p.pProp, c);
  if (pProp) {
    GUI_DRAWMODE OldDrawMode;
    const GUI_CHARINFO* pCharInfo = pProp->paCharInfo+(c-pProp->First);
    BytesPerLine = pCharInfo->BytesPerLine;
    OldDrawMode  = LCD_SetDrawMode(DrawMode);
    Draw  ( GUI_Context.DispPosX, GUI_Context.DispPosY,
                       pCharInfo->XSize,
                       GUI_Context.pAFont->YSize,
                       BytesPerLine,
                       (U8 const*)pCharInfo->pData
                       );
    LCD_SetDrawMode(OldDrawMode); /* Restore draw mode */
    GUI_Context.DispPosX += pCharInfo->XDist;
  }
}

int GUIPROP_AA4_GetCharDistX(U16P c) {
  const GUI_FONT_PROP* pProp = GUIPROP_FindChar(GUI_Context.pAFont->p.pProp, c);
  return (pProp) ? (pProp->paCharInfo+(c-pProp->First))->XSize : 0;
}

void GUIPROP_AA4_GetFontInfo(void*pFont, GUI_FONTINFO* pfi) {
  GUI_USE_PARA(pFont);
  pfi->Flags = GUI_FONTINFO_FLAG_PROP | GUI_FONTINFO_FLAG_AA4;
}

char GUIPROP_AA4_IsInFont(void*pFont, U16 c) {
  const GUI_FONT_PROP* pProp = GUIPROP_FindChar(((GUI_FONT*)pFont)->p.pProp, c);
  return (pProp==NULL) ? 0 : 1;
}

/* End of file */