mybitmap.cpp

source code for mini mario

#include "StdAfx.h"
#include "MyBitmap.h"

MyBitmap::MyBitmap(void)
{
}

MyBitmap::~MyBitmap(void)
{
}


MyBitmap::MyBitmap(LPCTSTR str)
{
	cb = new CBitmap();
	cb->LoadBitmap(str);

}

//**----------------------------------------------------------

//** STEP 1: Load the bitmap into a CBitmap Object

//**----------------------------------------------------------

void MyBitmap::DrawTransparent(CDC * pDC, int x, int y, COLORREF crColour)
{
	try
	{
	COLORREF crOldBack = pDC->SetBkColor(RGB(255,255,255));
	COLORREF crOldText = pDC->SetTextColor(RGB(0,0,0));
	CDC dcImage, dcTrans;

	// Create two memory dcs for the image and the mask
	dcImage.CreateCompatibleDC(pDC);
	dcTrans.CreateCompatibleDC(pDC);

	// Select the image into the appropriate dc
	CBitmap* pOldBitmapImage = dcImage.SelectObject(cb);

	// Create the mask bitmap
	CBitmap bitmapTrans;
	BITMAP bm;
	cb->GetBitmap(&bm);
	int nWidth = bm.bmWidth;
	int nHeight = bm.bmHeight;
	bitmapTrans.CreateBitmap(nWidth, nHeight, 1, 1, NULL);

	// Select the mask bitmap into the appropriate dc
	CBitmap* pOldBitmapTrans = dcTrans.SelectObject(&bitmapTrans);

	// Build mask based on transparent colour
	dcImage.SetBkColor(crColour);
	dcTrans.BitBlt(0, 0, nWidth, nHeight, &dcImage, 0, 0, SRCCOPY);

	// Do the work - True Mask method - cool if not actual display
	pDC->BitBlt(x, y, nWidth, nHeight, &dcImage, 0, 0, SRCINVERT);
	pDC->BitBlt(x, y, nWidth, nHeight, &dcTrans, 0, 0, SRCAND);
	pDC->BitBlt(x, y, nWidth, nHeight, &dcImage, 0, 0, SRCINVERT);

	// Restore settings
	dcImage.SelectObject(pOldBitmapImage);
	dcTrans.SelectObject(pOldBitmapTrans);
	pDC->SetBkColor(crOldBack);
	pDC->SetTextColor(crOldText);
	}
	catch(...)
	{
	}

}



void MyBitmap::DrawTransparent(CDC * pDC, int x, int y,int x1, int y1,int width,int height, COLORREF crColour)
{

	try
	{
	COLORREF crOldBack = pDC->SetBkColor(RGB(255,255,255));
	COLORREF crOldText = pDC->SetTextColor(RGB(0,0,0));
	CDC dcImage, dcTrans;

	// Create two memory dcs for the image and the mask
	dcImage.CreateCompatibleDC(pDC);
	dcTrans.CreateCompatibleDC(pDC);

	// Select the image into the appropriate dc
	CBitmap* pOldBitmapImage = dcImage.SelectObject(cb);

	// Create the mask bitmap
	CBitmap bitmapTrans;
	BITMAP bm;
	cb->GetBitmap(&bm);
	int nWidth = width;
	int nHeight = height;
	bitmapTrans.CreateBitmap(nWidth, nHeight, 1, 1, NULL);

	// Select the mask bitmap into the appropriate dc
	CBitmap* pOldBitmapTrans = dcTrans.SelectObject(&bitmapTrans);

	// Build mask based on transparent colour
	dcImage.SetBkColor(crColour);
	dcTrans.BitBlt(0, 0, nWidth, nHeight, &dcImage, x1, y1, SRCCOPY);
	

	// Do the work - True Mask method - cool if not actual display
	pDC->BitBlt(x, y, nWidth, nHeight, &dcImage, x1, y1, SRCINVERT);
	pDC->BitBlt(x, y, nWidth, nHeight, &dcTrans, x1, y1, SRCAND);
	pDC->BitBlt(x, y, nWidth, nHeight, &dcImage, x1, y1, SRCINVERT);

	// Restore settings
	dcImage.SelectObject(pOldBitmapImage);
	dcTrans.SelectObject(pOldBitmapTrans);
	pDC->SetBkColor(crOldBack);
	pDC->SetTextColor(crOldText);
	}
	catch(...)
	{
	}

}