Bitmap256.cpp

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/*
 * OpenClonk, http://www.openclonk.org
 *
 * Copyright (c) 1998-2000, Matthes Bender
 * Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de/
 * Copyright (c) 2011-2016, The OpenClonk Team and contributors
 *
 * Distributed under the terms of the ISC license; see accompanying file
 * "COPYING" for details.
 *
 * "Clonk" is a registered trademark of Matthes Bender, used with permission.
 * See accompanying file "TRADEMARK" for details.
 *
 * To redistribute this file separately, substitute the full license texts
 * for the above references.
 */
 
/* A structure for handling 256-color bitmap files */
 
#include "C4Include.h"
#include "graphics/Bitmap256.h"
#include "lib/StdColors.h"
 
void C4BMPInfo::Default()
{
    InplaceReconstruct(this);
}
 
int C4BMPInfo::FileBitsOffset()
{
    return Head.bfOffBits-sizeof(C4BMPInfo);
}
 
void C4BMPInfo::Set(int iWdt, int iHgt, int iBitDepth)
{
    Default();
    // Set header
    Head.bfType=*((const WORD*)"BM");
    Head.bfSize=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+DWordAligned(iWdt)*iHgt;
    Head.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
    // Set bitmap info
    Info.biSize=sizeof(BITMAPINFOHEADER);
    Info.biWidth=iWdt;
    Info.biHeight=iHgt;
    Info.biPlanes=1;
    Info.biBitCount=iBitDepth;
    Info.biCompression=0;
    Info.biSizeImage=iWdt*iHgt;
    Info.biClrUsed=Info.biClrImportant=0;
}
 
 
bool C4BMP256Info::Valid()
{
    if (Head.bfType != *((const WORD*)"BM") ) return false;
    if ((Info.biBitCount!=8) || (Info.biCompression!=0)) return false;
    return true;
}
 
int C4BMP256Info::FileBitsOffset()
{
    return Head.bfOffBits-sizeof(C4BMP256Info);
}
 
void C4BMP256Info::Set(int iWdt, int iHgt, CStdPalette *Palette)
{
    Default();
    // Set header
    Head.bfType=*((const WORD*)"BM");
    Head.bfSize=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+256*sizeof(RGBQUAD)+DWordAligned(iWdt)*iHgt;
    Head.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+256*sizeof(RGBQUAD);
    // Set bitmap info
    Info.biSize=sizeof(BITMAPINFOHEADER);
    Info.biWidth=iWdt;
    Info.biHeight=iHgt;
    Info.biPlanes=1;
    Info.biBitCount=8;
    Info.biCompression=0;
    Info.biSizeImage=iWdt*iHgt;
    Info.biClrUsed=Info.biClrImportant=256;
    // Set palette
    for (int cnt=0; cnt<256; cnt++)
    {
        Colors[cnt].rgbRed   = GetRedValue(Palette->Colors[cnt]);
        Colors[cnt].rgbGreen = GetGreenValue(Palette->Colors[cnt]);
        Colors[cnt].rgbBlue  = GetBlueValue(Palette->Colors[cnt]);
    }
}
 
void C4BMP256Info::Default()
{
    InplaceReconstruct(this);
}