GPC_RawImage.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <iostream>
#include <string.h>

#include "GPC_RawImage.h"
#include "GPC_RawLogoArrays.h"


GPC_RawImage::GPC_RawImage()
        : m_data(0), m_dataSize(0), m_width(0), m_height(0)
{
}


bool GPC_RawImage::Load(
        const char *srcName,
        int destWidth, int destHeight,
        TImageAlignment alignment, int offsetX, int offsetY)
{
    int srcWidth, srcHeight;
    bool success = true;
    if(strcmp(srcName, "BlenderLogo") == 0)
        GetRawBlenderLogo(&m_data, &srcWidth, &srcHeight);
    else
        if(strcmp(srcName, "Blender3DLogo") == 0)
            GetRawBlender3DLogo(&m_data, &srcWidth, &srcHeight);
#if 0
    else
        if(strcmp(srcName, "NaNLogo") == 0)
            GetRawNaNLogo(&m_data, &srcWidth, &srcHeight);
#endif
        else  // unknown image
            success = false;

    if(success)
    {
        unsigned char *tempData = m_data;

        int numBytes = destWidth * destHeight * 4;
        m_data = new unsigned char[numBytes];  // re-use m_data ('unsigned char' was 'char')
        if(m_data)
        {
            ::memset(m_data, 0x00000000, numBytes);
            m_width = destWidth;
            m_height = destHeight;

            int srcBytesWidth = srcWidth * 4;
            int dstBytesWidth = m_width * 4;
            int numRows = (srcHeight + offsetY) < m_height ? srcHeight : m_height - offsetY;
            numBytes = (srcWidth + offsetX) < m_width ? srcBytesWidth : (m_width - offsetX) * 4;

            if((offsetX < m_width) && (offsetY < m_height))
            {
                unsigned char* src = (unsigned char*)tempData;
                unsigned char* dst = (unsigned char*)m_data;
                if(alignment == alignTopLeft)
                {
                    // Put original in upper left corner

                    // Add vertical offset
                    dst += offsetY * dstBytesWidth; 
                    // Add horizontal offset
                    dst += offsetX * 4;
                    for (int row = 0; row < numRows; row++)
                    {
                        ::memcpy(dst, src, numBytes);
                        src += srcBytesWidth;
                        dst += dstBytesWidth;
                    }
                }
                else
                {
                    // Put original in lower right corner

                    // Add vertical offset
                    dst += (m_height - (srcHeight + offsetY)) * dstBytesWidth;
                    // Add horizontal offset
                    if (m_width > (srcWidth + offsetX)) {
                        dst += (m_width - (srcWidth + offsetX)) * 4;
                    }
                    else {
                        src += (srcWidth + offsetX - m_width) * 4;
                    }
                    for (int row = 0; row < numRows; row++) {
                        ::memcpy(dst, src, numBytes);
                        src += srcBytesWidth;
                        dst += dstBytesWidth;
                    }
                }
            }
// doesn't compile under Linux          delete [] tempData;
            delete tempData;
        }
        else {
            // Allocation failed, restore old data
            m_data = tempData;
            success = false;
        }
    }
    
    return success;
}