#include <mdiwin/resize.hpp>
#include <mdiwin/main.hpp>

Resize::Resize(int width,int height, const RECT &copyRect,HGLOBAL hGlobalImage)
: mIsCopyRect(TRUE), mCopyRect(copyRect), mhGlobalImage(hGlobalImage),
	mOldWidth(width), mOldHeight(height), mNewWidth((copyRect.right-copyRect.left)+1),
	mNewHeight((copyRect.bottom-copyRect.top)+1)
{
}

Resize::Resize(int width,int height,int newWidth, int newHeight, HGLOBAL hGlobalImage)
: mIsCopyRect(FALSE), mhGlobalImage(hGlobalImage), mOldWidth(width),
	mOldHeight(height), mNewWidth(newWidth), mNewHeight(newHeight)
{
}

Resize::~Resize()
{
}

HGLOBAL Resize::resizeImage(void)
{
  HGLOBAL hGlobalTemp;
	HGLOBAL hGlobalCopy;
	HGLOBAL hGlobalRegion;
	UHUGE *ptrCopy;
	UHUGE *ptrImage;
	UHUGE *ptrRegion;
	UHUGE *ptrTemp;
	int destRow;
	int srcRow;
	Index i;

	if(!mhGlobalImage)return mhGlobalImage;
	if(!mIsCopyRect)::SetRect(&mCopyRect,0,0,mNewWidth-1,mNewHeight-1);
	if(mCopyRect.right>=mOldWidth || mCopyRect.bottom>=mOldHeight)return FALSE;
	hGlobalCopy=::GlobalAlloc(GMEM_FIXED,(LONG)mOldWidth*(LONG)mOldHeight);
	if(!hGlobalCopy)return hGlobalCopy;
	ptrCopy=(UHUGE *)::GlobalLock(hGlobalCopy);
	ptrImage=(UHUGE *)::GlobalLock(mhGlobalImage);
	for(i=0;i<mOldHeight;i++)
		Main::hmemcpy(ptrCopy+(i*(LONG)mOldWidth),(ptrImage+((LONG)mOldHeight-i)*(LONG)mOldWidth)-(LONG)mOldWidth,mOldWidth);
	::GlobalUnlock(mhGlobalImage);
	hGlobalRegion=::GlobalAlloc(GMEM_FIXED,((LONG)mNewWidth*(LONG)mNewHeight));
	ptrRegion=(UHUGE *)::GlobalLock(hGlobalRegion);
	for(destRow=0,srcRow=mCopyRect.top;srcRow<=mCopyRect.bottom;srcRow++,destRow++)
		Main::hmemcpy(ptrRegion+((LONG)destRow*(LONG)mNewWidth),
			ptrCopy+((LONG)srcRow*(LONG)mOldWidth)+(LONG)mCopyRect.left,(LONG)mNewWidth);
	::GlobalUnlock(hGlobalCopy);
	::GlobalFree(hGlobalCopy);
	hGlobalTemp=::GlobalAlloc(GMEM_FIXED,(LONG)mNewWidth*(LONG)mNewHeight);
	ptrTemp=(UHUGE *)::GlobalLock(hGlobalTemp);
	for(i=0;i<(LONG)mNewHeight;i++)
		Main::hmemcpy(ptrTemp+(i*(LONG)mNewWidth),(ptrRegion+((LONG)mNewHeight-i)*(LONG)mNewWidth)-(LONG)mNewWidth,(LONG)mNewWidth);
	::GlobalUnlock(hGlobalRegion);
	::GlobalFree(hGlobalRegion);
	::GlobalUnlock(hGlobalTemp);
	return hGlobalTemp;
}