Texture.cpp

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/*
 *  Copyright (C) 2002-2006  Ryan Nunn and The Pentagram Team
 *
 *  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 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "pent_include.h"
#include "Texture.h"
#include "TextureBitmap.h"
#include "TextureTarga.h"
#include "TexturePNG.h"

#include <cstring>

//
// Base Clear Func
//
bool Texture::Clear()
{
        // Temporary fix to prevent us from freeing a RenderSurface's memory
        if (format != TEX_FMT_NATIVE)
                delete [] buffer;
        buffer = 0;
                
        return true;
}

//
// Destructor
//
Texture::~Texture()
{
        Clear();
}

//
// Helper Macro for texture type detection
//
#define TRY_TYPE(TextureType)                           \
tex = new TextureType();                                        \
/* If read failed, delete the texture. */       \
if (!tex->Read(ds)) {                                           \
        delete tex;                                                             \
        tex = 0;                                                                \
}                                                                                       \
else {                                                                          \
        /* Worked so return it */                               \
        return tex;                                                             \
}

//
// Create a texture from a Data Source
// (filename is used to help detection of type)
//
Texture * Texture::Create(IDataSource *ds, const char *filename)
{
        Texture *tex;

        if (filename) {
                // Looks like it's a PNG
                if (std::strstr(filename, ".png")) {
                        TRY_TYPE(TexturePNG);
                }
                // Looks like it's a BMP
                if (std::strstr(filename, ".bmp")) {
                        TRY_TYPE(TextureBitmap);
                }
                // Looks like it's a TGA
                if (std::strstr(filename, ".tga")) {
                        TRY_TYPE(TextureTarga);
                }
        }

        // Now go through each type 1 by 1
        TRY_TYPE(TexturePNG);
        TRY_TYPE(TextureBitmap);
        TRY_TYPE(TextureTarga);

        // Couldn't find it
        return 0;
}

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