이야기 마을

//이건 기본 지정되있는 API이며 Msimg32.lib 이넘을 링크해야 사용가능
TransparentBlt(mydc->m_hDC, 0, 0, m_ButtonSize.cx, m_ButtonSize.cy, pMemDC->m_hDC, 0, 0, m_ButtonSize.cx, m_ButtonSize.cy, RGB(255,0,255));


// 이 아래는 커스텀형식의 마스크이미지를 자동으로 만들고 투명처리하는 함수..
// 1번과 2번...뭐 암거나...사용

TransparentBlt1(mydc->m_hDC, 0, 0, pMemDC->m_hDC, m_ButtonSize.cx, m_ButtonSize.cy, RGB(255,0,255));

TransparentBlt2(mydc, 0, 0, m_ButtonSize.cx, m_ButtonSize.cy, pMemDC, RGB(255,0,255));



void TransparentBlt1(HDC hdc, int xStart, int yStart, HDC hdcTemp, int nWidth, int nHeight, COLORREF cTransparentColor)
{
    COLORREF   cColor;
    HBITMAP    bmAndBack, bmAndObject, bmAndMem, bmSave;
    HBITMAP    bmBackOld, bmObjectOld, bmMemOld, bmSaveOld;
    HDC        hdcMem, hdcBack, hdcObject, hdcSave;
    POINT      ptSize;    

    ptSize.x = nWidth;
    ptSize.y = nHeight;
    DPtoLP(hdcTemp, &ptSize, 1);      // Convert from device
                                     // to logical points    

    // Create some DCs to hold temporary data.
    hdcBack   = CreateCompatibleDC(hdc);
    hdcObject = CreateCompatibleDC(hdc);
    hdcMem    = CreateCompatibleDC(hdc);
    hdcSave   = CreateCompatibleDC(hdc);

    // Create a bitmap for each DC.    

    // Monochrome DC
    bmAndBack   = CreateBitmap(ptSize.x, ptSize.y, 1, 1, NULL);    

    // Monochrome DC
    bmAndObject = CreateBitmap(ptSize.x, ptSize.y, 1, 1, NULL);
    bmAndMem    = CreateCompatibleBitmap(hdc, ptSize.x, ptSize.y);
    bmSave      = CreateCompatibleBitmap(hdc, ptSize.x, ptSize.y);    

    // Each DC must select a bitmap object to store pixel data.
    bmBackOld   = (HBITMAP) SelectObject(hdcBack, bmAndBack);
    bmObjectOld = (HBITMAP) SelectObject(hdcObject, bmAndObject);
    bmMemOld    = (HBITMAP) SelectObject(hdcMem, bmAndMem);
    bmSaveOld   = (HBITMAP) SelectObject(hdcSave, bmSave);    

    // Set proper mapping mode.
    SetMapMode(hdcTemp, GetMapMode(hdc));

    // Save the bitmap sent here, because it will be overwritten.
    BitBlt(hdcSave, 0, 0, ptSize.x, ptSize.y, hdcTemp, 0, 0, SRCCOPY);    

    // Set the background color of the source DC to the color.
    // contained in the parts of the bitmap that should be transparent
    cColor = SetBkColor(hdcTemp, cTransparentColor);    

    // Create the object mask for the bitmap by performing a BitBlt
    // from the source bitmap to a monochrome bitmap.
    BitBlt(hdcObject, 0, 0, ptSize.x, ptSize.y, hdcTemp, 0, 0, SRCCOPY);    

    // Set the background color of the source DC back to the original
    // color.
    SetBkColor(hdcTemp, cColor);    

    // Create the inverse of the object mask.
    BitBlt(hdcBack, 0, 0, ptSize.x, ptSize.y, hdcObject, 0, 0, NOTSRCCOPY);    

    // Copy the background of the main DC to the destination.
    BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdc, xStart, yStart, SRCCOPY);    

    // Mask out the places where the bitmap will be placed.
    BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdcObject, 0, 0, SRCAND);    

    // Mask out the transparent colored pixels on the bitmap.
    BitBlt(hdcTemp, 0, 0, ptSize.x, ptSize.y, hdcBack, 0, 0, SRCAND);    

    // XOR the bitmap with the background on the destination DC.
    BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdcTemp, 0, 0, SRCPAINT);    

    // Copy the destination to the screen.
    BitBlt(hdc, xStart, yStart, ptSize.x, ptSize.y, hdcMem, 0, 0, SRCCOPY);    

    // Place the original bitmap back into the bitmap sent here.
    BitBlt(hdcTemp, 0, 0, ptSize.x, ptSize.y, hdcSave, 0, 0, SRCCOPY);    

    // Delete the memory bitmaps.
    DeleteObject(SelectObject(hdcBack, bmBackOld));
    DeleteObject(SelectObject(hdcObject, bmObjectOld));
    DeleteObject(SelectObject(hdcMem, bmMemOld));
    DeleteObject(SelectObject(hdcSave, bmSaveOld));    

    // Delete the memory DCs.
    DeleteDC(hdcMem);
    DeleteDC(hdcBack);
    DeleteDC(hdcObject);
    DeleteDC(hdcSave);


}

void TransparentBlt2(CDC *destDC, int nX, int nY, int nW, int nH, CDC *buffDC, COLORREF crTransparent)
{
        CDC        *dc = GetDC();
        CDC        dcTemp, dcMask2, dcMask3;
        CBitmap bitmapTemp, *bitmapTempOld;
        CBitmap bitmapMask2, *bitmapMask2Old;
        CBitmap bitmapMask3, *bitmapMask3Old;

        // DC 만드는 평범한...
        dcTemp.CreateCompatibleDC(dc);
        bitmapTemp.CreateCompatibleBitmap(dc, nW, nH);
        bitmapTempOld = dcTemp.SelectObject(&bitmapTemp);
       
        dcMask2.CreateCompatibleDC(dc);
        bitmapMask2.CreateBitmap(nW, nH, 1, 1, NULL);
        bitmapMask2Old = dcMask2.SelectObject(&bitmapMask2);
       
        dcMask3.CreateCompatibleDC(dc);
        bitmapMask3.CreateBitmap(nW, nH, 1, 1, NULL);
        bitmapMask3Old = dcMask3.SelectObject(&bitmapMask3);
       
        // 마스크 패턴 생성. 투명색 부분만 백색으로 나머지는 검은색으로
        COLORREF crOldBack = buffDC->SetBkColor(crTransparent);
        dcMask3.BitBlt(0, 0, nW, nH, buffDC, 0, 0, SRCCOPY);
        buffDC->SetBkColor(crOldBack);

        destDC->BitBlt(nX, nY, nW, nH, &dcMask3, 0, 0, SRCAND);

        dcMask3.PatBlt(0, 0, nW, nH, PATINVERT);

        dcTemp.BitBlt(0, 0, nW, nH, buffDC, 0, 0, SRCCOPY);
        dcTemp.BitBlt(0, 0, nW, nH, &dcMask3, 0, 0, SRCAND);

        destDC->BitBlt(nX, nY, nW, nH, &dcTemp, 0, 0, SRCPAINT);


        // 리소스 반환
        dcMask3.SelectObject(bitmapMask3Old);
        dcMask3.DeleteDC();
        bitmapMask3.DeleteObject();
       
        dcTemp.SelectObject(bitmapTempOld);
        dcTemp.DeleteDC();
        bitmapTemp.DeleteObject();
       
        dcMask2.SelectObject(bitmapMask2Old);
        dcMask2.DeleteDC();
        bitmapMask2.DeleteObject();
       
        ReleaseDC(dc);
}