/*************************************************************************************************************
                                                   uC/GUI
                                               嵌入式通用圖形軟件
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.
************************************************************************************************************/


#include "GUI_Private.H"
 

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

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

static const U8 Bit2Mask0[] = {1<<7, 1<<5, 1<<3, 1<<1};
static const U8 Bit2Mask1[] = {1<<6, 1<<4, 1<<2, 1<<0};

typedef void tSetPixelAA(int x, int y, U8 Intens);

static void Draw(int x0, int y0, int XSize, int YSize, int BytesPerLine, const U8*pData) {
    int x, y;
    tSetPixelAA* pfSetPixelAA;
    pfSetPixelAA = (GUI_Context.TextMode & GUI_TM_TRANS)
                 ? LCD_SetPixelAA : LCD_SetPixelAA_NoTrans;
	  for (y=0; y<YSize; y++) {
  	  const U8* pData0 = pData;
	    const U8* pData1 = pData+BytesPerLine;
  	  for (x=0; x<XSize; x++) {
        int PixelCnt=0;
        int Mask0 = Bit2Mask0[x&3];
        int Mask1 = Bit2Mask1[x&3];
			  if ((*pData0) & Mask0)
			    PixelCnt++;
			  if ((*pData0) & Mask1)
			    PixelCnt++;
			  if ((*pData1) & Mask0)
			    PixelCnt++;
			  if ((*pData1) & Mask1)
			    PixelCnt++;
        if ((x&3) ==3) {
          pData0++;
          pData1++;
			  }
        switch (PixelCnt) {
        case 4: LCD_HL_DrawPixel(x0+x,y0+y);      break;
        case 3: (*pfSetPixelAA) (x0+x,y0+y, 12); break;
        case 2: (*pfSetPixelAA) (x0+x,y0+y, 8);  break;
        case 1: (*pfSetPixelAA) (x0+x,y0+y, 4);  break;
			  }
  	  }
      pData+=2*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 GUIPROPAA_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+1)/2,
                       GUI_Context.pAFont->YSize,
                       BytesPerLine,
                       (U8 const*) pCharInfo->pData
                       );
    LCD_SetDrawMode(OldDrawMode); /* Restore draw mode */
    GUI_Context.DispPosX += (pCharInfo->XDist+1)/2;
  }
}

int GUIPROPAA_GetCharDistX(U16P c) 
{
  int r;
  const GUI_FONT_PROP* pProp = GUIPROP_FindChar(GUI_Context.pAFont->p.pProp, c);
  r = (pProp) ? (pProp->paCharInfo+(c-pProp->First))->XSize : 0;
  return (r+1)/2;
}

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

char GUIPROPAA_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 */