/*************************************************************************************************************
                                                   uC/GUI
                                               嵌入式通用圖形軟件
File        : GUICharAA2.C
Purpose     : Display antialiased 2bpp
----------------------------------------------------------------------
Version-Date---Author-Explanation
----------------------------------------------------------------------
1.00.01 011031 JE     a) GL_DrawBitmap called instead of GUI_DrawBitmap
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>

/*
      ***********************************************************
      *                                                         *
      *       Static defines
      *                                                         *
      ***********************************************************
*/

#define MAX_CHAR_SIZE 100

/*
      ***********************************************************
      *                                                         *
      *       Static variables
      *                                                         *
      ***********************************************************
*/

/* used by transparent characters */
static const int aConvTable[4] = {0, 5, 10, 15};

/* used by non transparent characters */
static LCD_COLOR aColor[4];
static LCD_PIXELINDEX OldColorIndex, OldBkColorIndex;
static GUI_LOGPALETTE Palette = {4, 0, &aColor[0]};
static GUI_BITMAP Bitmap = {0, 0, 0, 2, 0, &Palette, 0};

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

static void DrawNoTrans(int x0, int y0, int XSize, int YSize, int BytesPerLine, const U8*pData) {
  if ((OldColorIndex   != LCD_COLORINDEX) || 
      (OldBkColorIndex != LCD_BKCOLORINDEX)) {
    int i;
    LCD_PIXELINDEX BkColorIndex = LCD_BKCOLORINDEX;
    LCD_PIXELINDEX ColorIndex   = LCD_COLORINDEX;
    LCD_COLOR BkColor = LCD_Index2Color(BkColorIndex);
    LCD_COLOR Color   = LCD_Index2Color(ColorIndex);
    aColor[0] = BkColor;
    for (i = 1; i < 3; i++) {
      U8 Intens;
      Intens = 5 * i;
      aColor[i] = LCD_AA_MixColors(Color, BkColor, Intens);
    }
    aColor[3] = Color;
    LCD_GetpPalConvTableUncached(&Palette);
    OldColorIndex = ColorIndex;
    OldBkColorIndex = BkColorIndex;
  }
  Bitmap.XSize = XSize;
  Bitmap.YSize = YSize;
  Bitmap.BytesPerLine = BytesPerLine;
  Bitmap.pData = pData;
  GL_DrawBitmap(&Bitmap, x0, y0);
}

static void DrawTrans(int x0, int y0, int XSize, int YSize, int BytesPerLine, const U8*pData) {
  int x, y;
  for (y = 0; y < YSize; y++) {
    const U8 *pData0 = pData;
    U8 Rem = XSize & 3;
    for (x = 0; x < XSize - 1; x += 4) {
      LCD_SetPixelAA(x + x0    , y0 + y, aConvTable[((*pData0  ) >> 6)       ]);
      LCD_SetPixelAA(x + x0 + 1, y0 + y, aConvTable[((*pData0  ) >> 4) & 0x03]);
      LCD_SetPixelAA(x + x0 + 2, y0 + y, aConvTable[((*pData0  ) >> 2) & 0x03]);
      LCD_SetPixelAA(x + x0 + 3, y0 + y, aConvTable[((*pData0++)     ) & 0x03]);
  	}
    if (Rem) {
      LCD_SetPixelAA(x + x0    , y0 + y, aConvTable[((*pData0  ) >> 6)       ]);
      if (Rem > 1) {
        LCD_SetPixelAA(x + x0 + 1, y0 + y, aConvTable[((*pData0  ) >> 4) & 0x03]);
        if (Rem > 2) {
          LCD_SetPixelAA(x + x0 + 2, y0 + y, aConvTable[((*pData0  ) >> 2) & 0x03]);
        }
      }
    }
    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_AA2_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);
    if (DrawMode && GUI_TM_TRANS) {
      DrawTrans(GUI_Context.DispPosX, 
                GUI_Context.DispPosY,
                pCharInfo->XSize,
                GUI_Context.pAFont->YSize,
                BytesPerLine,
                (U8 const*)pCharInfo->pData
      );
    } else {
      DrawNoTrans(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_AA2_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_AA2_GetFontInfo(void*pFont, GUI_FONTINFO* pfi) {
  GUI_USE_PARA(pFont);
  pfi->Flags = GUI_FONTINFO_FLAG_PROP | GUI_FONTINFO_FLAG_AA2;
}

char GUIPROP_AA2_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 */