kc3-lang/ftgl/src/FTBitmapGlyph.cpp

Branch : - branch - master - tag -

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  Commit

• Author : henry
  Date : 2004-08-22 05:50:33
  Hash : 2a980faa
  Message : Removed unnecessary translates in the glyph rendering code.

• src/FTBitmapGlyph.cpp

• #include    <string>
  
  #include "FTBitmapGlyph.h"
  
  FTBitmapGlyph::FTBitmapGlyph( FT_GlyphSlot glyph)
  :   FTGlyph( glyph),
      destWidth(0),
      destHeight(0),
      data(0)
  {
      err = FT_Render_Glyph( glyph, FT_RENDER_MODE_MONO);
      if( err || ft_glyph_format_bitmap != glyph->format)
      {
          return;
      }
  
      FT_Bitmap bitmap = glyph->bitmap;
  
      unsigned int srcWidth = bitmap.width;
      unsigned int srcHeight = bitmap.rows;
      unsigned int srcPitch = bitmap.pitch;
      
      destWidth = srcWidth;
      destHeight = srcHeight;
      destPitch = srcPitch;    
  
      if( destWidth && destHeight)
      {
          data = new unsigned char[destPitch * destHeight];
          unsigned char* dest = data + (( destHeight - 1) * destPitch);
  
          unsigned char* src = bitmap.buffer;
  
          for( unsigned int y = 0; y < srcHeight; ++y)
          {
              memcpy( dest, src, srcPitch);
              dest -= destPitch;
              src += srcPitch;
          }
      }
      
      pos.x = glyph->bitmap_left;
      pos.y = static_cast<int>(srcHeight) - glyph->bitmap_top;
  }
  
  
  FTBitmapGlyph::~FTBitmapGlyph()
  {
      delete [] data;
  }
  
  
  float FTBitmapGlyph::Render( const FTPoint& pen)
  {
      glBitmap( 0, 0, 0.0, 0.0, pen.x + pos.x, pen.y - pos.y, (const GLubyte*)0 );
      
      if( data)
      {
          glPixelStorei( GL_UNPACK_ROW_LENGTH, destPitch * 8);
          glBitmap( destWidth, destHeight, 0.0f, 0.0, 0.0, 0.0, (const GLubyte*)data);
      }
      
      glBitmap( 0, 0, 0.0, 0.0, -pos.x, pos.y, (const GLubyte*)0 );
      
      return advance;
  }