//----------------------------------------------------------------------------
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE, LPSTR acArgument, int)
{
Command* pkCommand = NULL;
if ( acArgument && strlen(acArgument) > 0 )
{
char* acProcessed = ProcessCommand(acArgument);
pkCommand = new Command(acProcessed);
assert( pkCommand );
delete[] acProcessed;
}
else
{
// command line was not specified
return -1;
}
float fMagnify;
if ( !pkCommand->Inf(0.0f).Float("m",fMagnify) )
{
// magnification factor was not specified
return -2;
}
char* acInputFile;
pkCommand->Filename(acInputFile);
if ( !acInputFile )
{
// input.bmp was not specified
return -3;
}
char* acOutputFile;
pkCommand->Filename(acOutputFile);
if ( !acOutputFile )
{
// output.bmp was not specified
delete[] acInputFile;
return -4;
}
HBITMAP hImage = (HBITMAP) LoadImage(NULL,acInputFile,IMAGE_BITMAP,0,0,
LR_LOADFROMFILE | LR_CREATEDIBSECTION);
if ( !hImage )
{
// input.bmp could not be loaded
return -5;
}
DIBSECTION dibSection;
GetObject(hImage,sizeof(DIBSECTION),&dibSection);
int iWidth = dibSection.dsBm.bmWidth;
int iHeight = dibSection.dsBm.bmHeight;
int iQuantity = dibSection.dsBm.bmWidth*dibSection.dsBm.bmHeight;
if ( dibSection.dsBm.bmBitsPixel != 24 )
{
// input.bmp was not 24-bit color
return -6;
}
// split into separate channels and interpolate each channel separately
float** aafB;
Interp2DBicubic::Allocate(iWidth,iHeight,aafB);
float** aafG;
Interp2DBicubic::Allocate(iWidth,iHeight,aafG);
float** aafR;
Interp2DBicubic::Allocate(iWidth,iHeight,aafR);
unsigned char* pucSrc = (unsigned char*) dibSection.dsBm.bmBits;
int iX, iY;
for (iY = 0; iY < iHeight; iY++)
{
for (iX = 0; iX < iWidth; iX++)
{
aafB[iY][iX] = *pucSrc++;
aafG[iY][iX] = *pucSrc++;
aafR[iY][iX] = *pucSrc++;
}
}
Interp2DBicubic kB(iWidth,iHeight,0.0f,1.0f,0.0f,1.0f,aafB);
Interp2DBicubic kG(iWidth,iHeight,0.0f,1.0f,0.0f,1.0f,aafG);
Interp2DBicubic kR(iWidth,iHeight,0.0f,1.0f,0.0f,1.0f,aafR);
// Compute width of output image. Make sure it is a multiple of 4 to
// handle the BMP requirement of row-byte-count being a multiple of 4.
int iOutWidth = (int)(fMagnify*iWidth);
int iRemainder = iOutWidth % 4;
if ( iRemainder > 0 )
iOutWidth += 4 - iRemainder;
int iOutHeight = (int)(fMagnify*iHeight);
int iOutQuantity = iOutWidth*iOutHeight;
float fXRatio = (iWidth-1.0f)/(iOutWidth-1.0f);
float fYRatio = (iHeight-1.0f)/(iOutHeight-1.0f);
unsigned char* aucDst = new unsigned char[3*iOutQuantity];
pucSrc = (unsigned char*) dibSection.dsBm.bmBits;
int i;
for (iY = 0, i = 0; iY < iOutHeight; iY++)
{
float fY = fYRatio*iY;
for (iX = 0; iX < iOutWidth; iX++)
{
float fX = fXRatio*iX;
float fValue = kB(fX,fY);
if ( fValue >= 0.0f )
{
if ( fValue <= 255.0f )
aucDst[i++] = (unsigned char)fValue;
else
aucDst[i++] = 255;
}
else
{
aucDst[i++] = 0;
}
fValue = kG(fX,fY);
if ( fValue >= 0.0f )
{
if ( fValue <= 255.0f )
aucDst[i++] = (unsigned char)fValue;
else
aucDst[i++] = 255;
}
else
{
aucDst[i++] = 0;
}
fValue = kR(fX,fY);
if ( fValue >= 0.0f )
{
if ( fValue <= 255.0f )
aucDst[i++] = (unsigned char)fValue;
else
aucDst[i++] = 255;
}
else
{
aucDst[i++] = 0;
}
}
}
SaveImage(acOutputFile,iOutWidth,iOutHeight,aucDst);
Interp2DBicubic::Deallocate(aafB);
Interp2DBicubic::Deallocate(aafG);
Interp2DBicubic::Deallocate(aafR);
DeleteObject(hImage);
delete[] acInputFile;
delete[] acOutputFile;
return 0;
}
