#include "mdx.h"


IDirectDrawSurface* DDLoadBitmap(IDirectDraw* pdd, LPCSTR szBitmap)
{

	HBITMAP hbm;
	BITMAP bm;
	IDirectDrawSurface *pdds;

	// Load Image for loading from Disk

	hbm = (HBITMAP)LoadImage(NULL, szBitmap, IMAGE_BITMAP,0,0,LR_LOADFROMFILE | LR_CREATEDIBSECTION);

	

	if(hbm == NULL) { return NULL; }

	GetObject(hbm, sizeof(bm), &bm); // size


	// Create Surface for this Bitmap

	pdds = CreateOffScreenSurface(pdd, bm.bmWidth,bm.bmHeight);

	if(pdds)
	{

		DDCopyBitmap(pdds, hbm, bm.bmWidth,bm.bmHeight);
	}


	DeleteObject(hbm);

	return pdds;

}
// this is a surface when can be cliped 
IDirectDrawSurface* CreateOffScreenSurface(IDirectDraw* pdd, int dx, int dy)
{

	DDSURFACEDESC ddsd;
	IDirectDrawSurface* pdds;

	// Create Surface for this bitmap

	ZeroMemory(&ddsd,sizeof(ddsd));
	ddsd.dwSize = sizeof(ddsd);
	ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
	ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
	ddsd.dwWidth = dx;
	ddsd.dwHeight = dy;

	if(pdd->CreateSurface(&ddsd, &pdds,NULL) != DD_OK)
	{
		return NULL;

	} else {

		return pdds;

	}

}
// Copy Bitmap
HRESULT DDCopyBitmap(IDirectDrawSurface* pdds, HBITMAP hbm, int dx, int dy)
{

	HDC hdcImage;
	HDC hdc;
	HRESULT hr;
	HBITMAP hbmOld;

	// Select Bitmap into a MemoryDC 

	hdcImage = CreateCompatibleDC(NULL);
	hbmOld = (HBITMAP)SelectObject(hdcImage, hbm);

	if((hr = pdds->GetDC(&hdc)) == DD_OK)
	{

		BitBlt(hdc,0,0,dx,dy,hdcImage,0,0,SRCCOPY);
		pdds->ReleaseDC(hdc);
	}

	SelectObject(hdcImage, hbmOld);
	DeleteDC(hdcImage);

	return hr;

}