/*
* File: ximawbmp.cpp
* Purpose: Platform Independent WBMP Image Class Loader and Writer
* 12/Jul/2002 <ing.davide.pizzolato@libero.it>
* CxImage version 5.80 29/Sep/2003
*/
#include "ximawbmp.h"
#if CXIMAGE_SUPPORT_WBMP
#include "ximaiter.h"
////////////////////////////////////////////////////////////////////////////////
bool CxImageWBMP::Decode(CxFile *hFile)
{
if (hFile == NULL) return false;
WBMPHEADER wbmpHead;
try
{
if (hFile->Read(&wbmpHead,sizeof(wbmpHead),1)==0)
throw "Not a WBMP";
if (wbmpHead.Type != 0)
throw "Unsupported WBMP type";
if (wbmpHead.ImageHeight==0 || wbmpHead.ImageWidth==0)
throw "Corrupted WBMP";
Create(wbmpHead.ImageWidth, wbmpHead.ImageHeight, 1, CXIMAGE_FORMAT_WBMP);
if (!IsValid()) throw "WBMP Create failed";
SetGrayPalette();
int linewidth=(wbmpHead.ImageWidth+7)/8;
CImageIterator iter(this);
iter.Upset();
for (int y=0; y < wbmpHead.ImageHeight; y++){
hFile->Read(iter.GetRow(),linewidth,1);
iter.PrevRow();
}
} catch (char *message) {
strncpy(info.szLastError,message,255);
return FALSE;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
bool CxImageWBMP::Encode(CxFile * hFile)
{
if (EncodeSafeCheck(hFile)) return false;
//check format limits
if ((head.biWidth>255)||(head.biHeight>255)||(head.biBitCount!=1)){
strcpy(info.szLastError,"Can't save this image as WBMP");
return false;
}
WBMPHEADER wbmpHead;
wbmpHead.Type=0;
wbmpHead.FixHeader=0;
wbmpHead.ImageWidth=(BYTE)head.biWidth;
wbmpHead.ImageHeight=(BYTE)head.biHeight;
// Write the file header
hFile->Write(&wbmpHead,sizeof(wbmpHead),1);
// Write the pixels
int linewidth=(wbmpHead.ImageWidth+7)/8;
CImageIterator iter(this);
iter.Upset();
for (int y=0; y < wbmpHead.ImageHeight; y++){
hFile->Write(iter.GetRow(),linewidth,1);
iter.PrevRow();
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
#endif // CXIMAGE_SUPPORT_WBMP
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