gnewfont_tge.cc

五行MMORPG引擎系统V1.0

//-----------------------------------------------------------------------------
// Torque Game Engine 
// Copyright (C) GarageGames.com, Inc.
//-----------------------------------------------------------------------------

#include "platform/platform.h"
#include "platform/platformFont.h"
#include "platform/profiler.h"
#include "platform/platformMutex.h"
#include "console/console.h"
#include "core/stream.h"
#include "dgl/gBitmap.h"
#include "core/fileStream.h"
#include "core/findMatch.h"
#include "dgl/gTexManager.h"
#include "dgl/gNewFont.h"
#include "util/safeDelete.h"
#include "core/frameAllocator.h"
#include "core/unicode.h"
#include "zlib.h"


//////////////////////////////////////////////////////////////////////////



	/// Chinese
#ifndef TGE_CHINESE


//////////////////////////////////////////////////////////////////////////
U32 GFont::getStrNWidth(const UTF8 *str, U32 n)
{
   // UTF8 conversion is expensive. Avoid converting in a tight loop.
   FrameTemp<UTF16> str16(n + 1);
   convertUTF8toUTF16(str, str16, n);
   return getStrNWidth(str16, n);
}

U32 GFont::getStrNWidth(const UTF16 *str, U32 n)
{
   AssertFatal(str != NULL, "GFont::getStrNWidth: String is NULL");

   if (str == NULL || str[0] == NULL || n == 0)   
      return 0;
      
   U32 totWidth = 0;
   UTF16 curChar;
   U32 charCount;
   
   for(charCount = 0; charCount <= n; charCount++)
   {
      curChar = str[charCount];
      if(curChar == NULL)
         break;

      if(isValidChar(curChar))
      {
         const PlatformFont::CharInfo& rChar = getCharInfo(curChar);
         totWidth += rChar.xIncrement;
      }
      else if (curChar == dT('\t'))
      {
         const PlatformFont::CharInfo& rChar = getCharInfo(dT(' '));
         totWidth += rChar.xIncrement * TabWidthInSpaces;
      }
   }

   return(totWidth);
}




U32 GFont::getStrNWidthPrecise(const UTF8 *str, U32 n)
{
	FrameTemp<UTF16> str16(n + 1);
   convertUTF8toUTF16(str, str16, n);
   return getStrNWidthPrecise(str16, n);
}

U32 GFont::getStrNWidthPrecise(const UTF16 *str, U32 n)
{
   AssertFatal(str != NULL, "GFont::getStrNWidth: String is NULL");

   if (str == NULL || str[0] == NULL || n == 0)   
      return(0);
      
   U32 totWidth = 0;
   UTF16 curChar;
   U32 charCount = 0;
   
   for(charCount = 0; charCount < n; charCount++)
   {
      curChar = str[charCount];
      if(curChar == NULL)
         break;
         
      if(isValidChar(curChar))
      {
         const PlatformFont::CharInfo& rChar = getCharInfo(curChar);
         totWidth += rChar.xIncrement;
      }
      else if (curChar == dT('\t'))
      {
         const PlatformFont::CharInfo& rChar = getCharInfo(dT(' '));
         totWidth += rChar.xIncrement * TabWidthInSpaces;
      }
   }

   UTF16 endChar = str[getMin(charCount,n-1)];

   if (isValidChar(endChar))
   {
      const PlatformFont::CharInfo& rChar = getCharInfo(endChar);
      if (rChar.width > rChar.xIncrement)
         totWidth += (rChar.width - rChar.xIncrement);
   }

   return(totWidth);
}



U32 GFont::getBreakPos(const UTF8 *string, U32 slen, U32 width, bool breakOnWhitespace)
{
   // Some early out cases.
   if(slen==0)
      return 0;

   U32 ret = 0;
   U32 lastws = 0;
   UTF16 c;
   U32 charCount = 0;

   // convert the buffer to utf16, converter will give us the length.

	FrameTemp<UTF16> str16(slen);
   U32 len16 = convertUTF8toUTF16(string, str16, slen);
   
   for( charCount=0; charCount < len16; charCount++)
   {
      c = str16[charCount];
      if(c == NULL)
         break;
         
      if(c == dT('\t'))
         c = dT(' ');
      if(!isValidChar(c))
      {
         ret++;
         continue;
      }
      if(c == dT(' '))
         lastws = ret+1;
      const PlatformFont::CharInfo& rChar = getCharInfo(c);
      if(rChar.width > width || rChar.xIncrement > width)
      {
         if(lastws && breakOnWhitespace)
            return lastws;
         return ret;
      }
      width -= rChar.xIncrement;
      
      ret++;
   }
   return ret;
}

void GFont::wrapString(const UTF8 *txt, U32 lineWidth, Vector<U32> &startLineOffset, Vector<U32> &lineLen)
{
   Con::errorf("GFont::wrapString(): Not yet converted to be UTF-8 safe");

   startLineOffset.clear();
   lineLen.clear();

   if (!txt || !txt[0] || lineWidth < getCharWidth('W')) //make sure the line width is greater then a single character
      return;

   U32 len = dStrlen(txt);

   U32 startLine; 

   for (U32 i = 0; i < len;)
   {
      startLine = i;
      startLineOffset.push_back(startLine);

      // loop until the string is too large
      bool needsNewLine = false;
      U32 lineStrWidth = 0;
      for (; i < len; i++)
      {
         if(isValidChar(txt[i]))
         {
            lineStrWidth += getCharInfo(txt[i]).xIncrement;
            if ( txt[i] == '\n' || lineStrWidth > lineWidth )
            {
               needsNewLine = true;
               break;      
            }
         }
      }

      if (!needsNewLine)
      {
         // we are done!
         lineLen.push_back(i - startLine);
         return;
      }

      // now determine where to put the newline
      // else we need to backtrack until we find a either space character 
      // or \\ character to break up the line. 
      S32 j;
      for (j = i - 1; j >= startLine; j--)
      {
         if (dIsspace(txt[j]))
            break;
      }

      if (j < startLine)
      {
         // the line consists of a single word!              
         // So, just break up the word
         j = i - 1;
      }
      lineLen.push_back(j - startLine);
      i = j;

      // now we need to increment through any space characters at the
      // beginning of the next line
      for (i++; i < len; i++)
      {
         if (!dIsspace(txt[i]) || txt[i] == '\n')
            break;
      }
   }
}

#endif