source: orxonox.OLD/branches/blink/src/lib/graphics/text_engine/font.cc

/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Benjamin Grauer
   co-programmer: ...
*/

#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_GRAPHICS

#include "font.h"

#ifdef HAVE_SDL_IMAGE_H
#include <SDL_image.h>
#else
#include <SDL/SDL_image.h>
#endif

#include "default_font.xpm"

#include "debug.h"
#include "compiler.h"

ObjectListDefinition(Font);

Font::Font()
    : data(Font::defaultFontData)
{
  this->init();
}

/**
 * @brief constructs a Font out of a TTF-FIle
 * @param fontFile the File to load the font from
 * @param fontSize the Size of the Font in Pixels
 */
Font::Font(const std::string& fontFile, unsigned int renderSize)
    : data(Font::defaultFontData)
{
  this->init();

  if (!fontFile.empty())
    this->loadFontFromTTF(fontFile, renderSize);
}


/**
 * @brief constructs a Font out of an ImageFile
 * @param imageFile the ImageFile to load the Font From.
 */
Font::Font(const std::string& imageFile)
    : data(Font::defaultFontData)
{
  this->init();

  this->setName(imageFile);
  //  this->setSize(fontSize);
  SDL_Surface* image = NULL;
  if (!imageFile.empty())
    image = IMG_Load(imageFile.c_str());
  else
    return;
  if (image != NULL)
  {
    this->loadFontFromSDL_Surface(image);
    SDL_FreeSurface(image);
  }
  else
    PRINTF(1)("loading from surface %s failed: %s\n", imageFile.c_str(), IMG_GetError());
}

/**
 * @brief constructs a Font
 * @param xpmArray the xpm-ARRAY to load the font from
 */
Font::Font(char** xpmArray)
    : data(Font::defaultFontData)
{
  this->init();
  this->setName("XPM-array-font");
  //  this->setSize(fontSize);
  SDL_Surface* image = NULL;
  if (xpmArray != NULL)
    image = IMG_ReadXPMFromArray(xpmArray);
  if (image != NULL)
  {
    this->loadFontFromSDL_Surface(image);
    SDL_FreeSurface(image);
  }
  else
    PRINTF(1)("Loading from XPM-array failed: %s\n", IMG_GetError());
}

Font::Font(const Font& font)
{
  this->init();
  *this = font;
}

/**
 * @brief destructs a font
 *
 * this releases the memory a font uses to be opened.
 * deletes the glLists, and the TTF-handler, if present.
 */
Font::~Font()
{ }

Font& Font::operator=(const Font& font)
{
  Material::operator=(font);
  this->data = font.data;
  this->setTexture(this->data->textureData());

  return *this;
};


/**
 * @brief initializes a Font (with default values)
 */
void Font::init()
{
  this->setBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

  this->registerObject(this, Font::_objectList);
  if (Font::defaultFontData.isNull())
  {
    Font::initDefaultFont();
    this->data = Font::defaultFontData;
  }
}

FontData::Pointer Font::defaultFontData(NULL);

/**
 * @brief initializes the default font
 */
void Font::initDefaultFont()
{
  // temporarily create a Font.
  Font::defaultFontData = FontData::Pointer(new FontData);
  // apply the Data.
  Font::defaultFontData = Font(font_xpm).data;
}


/**
 * @brief sets The Font.
 * @param fontFile The file containing the font.
 * @returns true if loaded, false if something went wrong, or if a font was loaded before.
 */
bool Font::loadFontFromTTF(const std::string& fontFile, unsigned int renderSize)
{
  this->data = FontData::Pointer (new FontData());
  bool retVal = this->data->loadFontFromTTF(fontFile, renderSize);
  if (!retVal)
    this->data = Font::defaultFontData;

  this->setTexture(this->data->textureData());
  return retVal;
}

/**
 * @brief loads a font From an XPM-array.
 * @param xpmArray the array of the XPM to load the font from.
 */
bool Font::loadFontFromSDL_Surface(SDL_Surface* surface)
{
  this->data = FontData::Pointer (new FontData());
  bool retVal = this->data->loadFontFromSDL_Surface(surface);
  if (!retVal)
    this->data = Font::defaultFontData;

  this->setTexture(this->data->textureData());
  return retVal;
}


/**
 * @brief sets a specific data->renderStyle
 * @param data->renderStyle the Style to render: a string (char-array) containing:
 *   i: italic, b: bold, u, underline
 */
void Font::setStyle(const std::string& renderStyle)
{
  /// FIXME
  //this->data->setStyle(renderStyle);
}


void Font::setTexture(const TextureData::Pointer& texDataPointer)
{
  this->setDiffuseMap(texDataPointer);
}


/**
 * @brief creates and exports an Image, that has all the characters
 * stored in a Array (as an image)
 * @param fileName the File to write the image into.
 */
void Font::createAsciiImage(const std::string& ttfFile, const std::string& fileName, unsigned int size)
{
  TTF_Font* fontTTF = TTF_OpenFont(ttfFile.c_str(), size);

  if (fontTTF == NULL)
    return;
  int height = TTF_FontHeight(fontTTF);

  //
  // Surface definition.
  SDL_Rect tmpRect; // this represents a Rectangle for blitting.
  SDL_Surface* tmpSurf =  SDL_CreateRGBSurface(SDL_SWSURFACE,
                          height*size, height*size,
                          32,
#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */
                          0x000000FF,
                          0x0000FF00,
                          0x00FF0000,
                          0xFF000000
#else
                          0xFF000000,
                          0x00FF0000,
                          0x0000FF00,
                          0x000000FF
#endif
                                              );
  tmpRect.x = 0; tmpRect.y = 0; tmpRect.w = tmpSurf->w; tmpRect.h = tmpSurf->h;
  SDL_SetClipRect(tmpSurf, &tmpRect);

  int posX, posY;
  // all the interessting Glyphs
  for (posY = 0; posY < 16; posY++)
  {
    for (posX = 0; posX < 16; posX++)
    {
      SDL_Surface* glyphSurf = NULL;
      SDL_Color white = {255, 255, 255};
      glyphSurf = TTF_RenderGlyph_Blended(fontTTF, posX+size*posY, white);

      if( glyphSurf != NULL )
      {
        tmpRect.x = height*posX;
        tmpRect.y = height*posY;
        SDL_SetAlpha(glyphSurf, 0, 0);

        SDL_BlitSurface(glyphSurf, NULL, tmpSurf, &tmpRect);
        SDL_FreeSurface(glyphSurf);
      }
    }
  }
  SDL_SaveBMP(tmpSurf, fileName.c_str());
  SDL_FreeSurface(tmpSurf);

  TTF_CloseFont(fontTTF);
}




/**
 * @brief a simple function to get some interesting information about this class
 */
void Font::debug() const
{
  Material::debug();

  //PRINT(0)("TEST %p and %p\n", this->data.get(), this->data->textureData().get());
  // print the loaded font's style
/*  int style = TTF_STYLE_NORMAL;
  if (likely(this->data->fontTTF != NULL))
    style = TTF_GetFontStyle(this->data->fontTTF);
  PRINTF(0)("The font style is:");
  if(style==TTF_STYLE_NORMAL)
    PRINTF(0)(" normal");
  else
  {
    if(style&TTF_STYLE_BOLD)
      PRINTF(0)(" bold");
    if(style&TTF_STYLE_ITALIC)
      PRINTF(0)(" italic");
    if(style&TTF_STYLE_UNDERLINE)
      PRINTF(0)(" underline");*/
//  }
  PRINTF(0)("\n");
}