bitmap.cpp

看到有兄弟提出的半透明算法

// Bitmap.cpp: implementation of the CBitmap class.
//
//////////////////////////////////////////////////////////////////////

#include "Bitmap.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CBitmap::CBitmap()
{
	m_pIBitmap = NULL;
}

CBitmap::CBitmap(IBitmap* pIBitmap)
{
	m_pIBitmap = pIBitmap;
}

CBitmap::~CBitmap()
{

}

int CBitmap::BltIn(IBitmap* pDest, int xDest, int yDest, int dx, int dy, 
					 int xSrc, int ySrc, AEERasterOp rop)
{
    if (m_pIBitmap == NULL)
    {
        return EBADCLASS;
    }
	
    return IBITMAP_BltIn(pDest, xDest, yDest, dx, dy, m_pIBitmap, xSrc, ySrc, rop);
}

CBitmap* CBitmap::CreateInstance()
{
	CBitmap* pObj = new CBitmap();

	// 返回实例指针
	return pObj;
}

int CBitmap::GetBMPInfo(AEEBitmapInfo& bmpInfo)
{
    if (m_pIBitmap == NULL)
    {
        return EBADCLASS;
    }
	
    return IBITMAP_GetInfo(m_pIBitmap, &bmpInfo, sizeof(bmpInfo));
}

int CBitmap::Draw(int nDrawX, int nDrawY, int dx, int dy, int xSrc, int ySrc, AEERasterOp rop)
{
	IBitmap* pbmScreen = NULL;
	IBitmap* pbmDdb = NULL;
	AEEBitmapInfo  bi;
	CGameApp* pApp = (CGameApp*)GETAPPINSTANCE();
	if (pApp == NULL)
	{
		IBITMAP_Release(pbmDdb);
		IBITMAP_Release(pbmScreen);
		return 0;
	}
	
	pbmScreen = IDISPLAY_GetDestination(((CGameApp*)GETAPPINSTANCE())->m_pIDisplay);
	
	IBITMAP_GetInfo(m_pIBitmap, &bi, sizeof(bi));
	IBITMAP_CreateCompatibleBitmap(pbmScreen, &pbmDdb, (uint16)bi.cx, (uint16)bi.cy);
	IBITMAP_BltIn(pbmDdb, 0, 0, dx, dy, m_pIBitmap, xSrc, ySrc, AEE_RO_COPY);
	IBITMAP_SetTransparencyColor(pbmDdb, pApp->m_pDoc->m_Color);
	IBITMAP_BltIn(pbmScreen, nDrawX, nDrawY, dx, dy, pbmDdb, 0, 0, AEE_RO_TRANSPARENT);
	IBITMAP_Release(pbmDdb);
	IBITMAP_Release(pbmScreen);
	
	return 0;
}

int CBitmap::Draw(boolean bSheer, int nDrawX, int nDrawY, int ndx, int ndy,
				  int nSrcX, int nSrcY, AEERasterOp rop)
{
	IBitmap* pbmScreen = NULL;
	IBitmap* pbmDdb = NULL;
	AEEBitmapInfo  bi;

	pbmScreen = IDISPLAY_GetDestination(((CGameApp*)GETAPPINSTANCE())->m_pIDisplay);
	
	IBITMAP_GetInfo(m_pIBitmap, &bi, sizeof(bi));
	IBITMAP_CreateCompatibleBitmap(pbmScreen, &pbmDdb, (uint16)bi.cx, (uint16)bi.cy);
	IBITMAP_BltIn(pbmDdb, 0, 0, bi.cx, bi.cy, m_pIBitmap, nSrcX, nSrcY, AEE_RO_COPY);
	
	if (bSheer)
		IBITMAP_SetTransparencyColor(pbmDdb, ((CGameApp*)GETAPPINSTANCE())->m_pDoc->m_Color);
	
	IBITMAP_BltIn(pbmScreen, nDrawX, nDrawY, ndx, ndy, pbmDdb, nSrcX, nSrcY, rop);
//	IDISPLAY_Update (((JFZGameApp*)GETAPPINSTANCE())->m_pIDisplay);
	IBITMAP_Release(pbmDdb);
	IBITMAP_Release(pbmScreen);
	
	return SUCCESS;
}

void CBitmap::FreeData()
{
	if (m_pIBitmap)
		IBITMAP_Release(m_pIBitmap);
}

int CBitmap::Load(int nResID)
{
	// 首先释放原有资源
	//	FreeData();
	
	// 载入图片
	CGameApp* pApp  = NULL;
	IShell* pIShell = NULL;
	
	BEGIN_CHECK
	{
		CHECK_NULL(pApp, (CGameApp*)GETAPPINSTANCE());
		CHECK_NULL(pIShell, pApp->m_pIShell);

		CHECK_NULL(m_pIBitmap, ISHELL_LoadResBitmap(pIShell, EIDOLON_RES_FILE, nResID));
	}
	CATCH_CHECK
	{
		CUSTOM_RELEASE(pApp);
		ISHELL_Release(pIShell);
		IBITMAP_Release(m_pIBitmap);
		return EFAILED;
	}
	END_CHECK

	return SUCCESS;
}

void CBitmap::Release()
{
	FreeData();
	if (this)
		delete this;
}

void CBitmap::DrawBgBitmap(int nX, int nY, int nWidth, int nHeight, int nSrcX, int nSrcY)
{
	int nReturn;
	// 获取显示的设备
	IBitmap* pScreen;
	nReturn = IDISPLAY_GetDeviceBitmap(((CGameApp*)GETAPPINSTANCE())->m_pIDisplay, &pScreen);
	if (nReturn != SUCCESS)
	{
		IRELEASE(pScreen, BITMAP);
		return;
	}
	
	CBitmap bmpDisplay(pScreen);
	
	// 绘图
	BltIn(bmpDisplay.m_pIBitmap, nX, nY, nWidth, nHeight, nSrcX, nSrcY, AEE_RO_COPY);
	
//	IDISPLAY_Update(((JFZGameApp*)GETAPPINSTANCE())->m_pIDisplay);
	
	IRELEASE(pScreen, BITMAP);
}