imagefontbase.cpp

/***************************************************************************
 *   Copyright (C) 2005-2008 by the FIFE team                              *
 *   http://www.fifengine.de                                               *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

// Standard C++ library includes
#include <algorithm>

// 3rd party library includes
#include <SDL.h>
#include <SDL_image.h>

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "util/base/exception.h"
#include "util/structures/rect.h"
#include "util/utf8/utf8.h"
#include "video/image.h"
#include "video/renderbackend.h"

#include "imagefontbase.h"

namespace FIFE {

    ImageFontBase::ImageFontBase() : FontBase() {
    }

    ImageFontBase::~ImageFontBase() {
        type_glyphs::iterator i = m_glyphs.begin();
        for(; i != m_glyphs.end(); ++i) {
            SDL_FreeSurface(i->second.surface);
        }
        
    }

    int32_t ImageFontBase::getWidth(const std::string& text) const {
        int32_t w = 0;
        std::string::const_iterator text_it = text.begin();
        while(text_it != text.end()) {
            uint32_t codepoint = utf8::next(text_it,text.end());
            type_glyphs::const_iterator it = m_glyphs.find( codepoint );

            if( it != m_glyphs.end() ) {
                w += it->second.surface->w + getGlyphSpacing();
                continue;
            }

            if( m_placeholder.surface ) {
                w += m_placeholder.surface->w + getGlyphSpacing();
            }
        }
        return w;
    }

    int32_t ImageFontBase::getHeight() const {
        return mHeight;
    }

    SDL_Surface *ImageFontBase::renderString(const std::string& text) {
        SDL_Surface *surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
            getWidth(text),getHeight(),32,
            RMASK, GMASK, BMASK ,AMASK);

        SDL_FillRect(surface,0,0x00000000);

        SDL_Rect dst;
        dst.x = dst.y = 0;
        s_glyph *glyph = 0;

        std::string::const_iterator text_it = text.begin();
        while(text_it != text.end()) {
            uint32_t codepoint = utf8::next(text_it,text.end());
            type_glyphs::iterator it = m_glyphs.find( codepoint );

            if( it == m_glyphs.end() ) {
                if( !m_placeholder.surface ) {
                    continue;
                }
                glyph = &m_placeholder;
            } else {
                glyph = &(it->second);
            }
            dst.y  = glyph->offset.y;
            dst.x += glyph->offset.x;

            SDL_BlitSurface(glyph->surface,0,surface,&dst);
            dst.x += glyph->surface->w + getGlyphSpacing();
        }

        return surface;
    }

    void ImageFontBase::setColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a) {
    }
}