www.pudn.com > SkinSlider.zip > ZipBitmap.cpp

// ZipBitmap.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "ZipBitmap.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
 
COLORREF rgbWhite = RGB(255,255,255); 
 
///////////////////////////////////////////////////////////////////////////// 
// CZipBitmap 
CZipBitmap::CZipBitmap() 
{ 
    m_iWidth = 0; 
    m_iHeight = 0; 
    m_hbmMask = NULL; 
} 
 
CZipBitmap::~CZipBitmap() 
{ 
} 
void CZipBitmap::GetMetrics() 
{ 
    // Get the width and height. 
    BITMAP bm; 
    GetObject(sizeof(bm), &bm); 
    m_iWidth = bm.bmWidth; 
    m_iHeight = bm.bmHeight; 
} 
 
int CZipBitmap::GetWidth() 
{ 
    if ((m_iWidth == 0) || (m_iHeight == 0)){ 
        GetMetrics(); 
    } 
    return m_iWidth; 
} 
 
int CZipBitmap::GetHeight() 
{ 
    if ((m_iWidth == 0) || (m_iHeight == 0)){ 
        GetMetrics(); 
    } 
    return m_iHeight; 
} 
 
void CZipBitmap::Draw(HDC hDC, int x, int y) 
{ 
    ASSERT(hDC); 
    // Create a memory DC. 
    HDC hdcMem = ::CreateCompatibleDC(hDC); 
    // Select the bitmap into the mem DC. 
    HBITMAP hbmold =  
        (HBITMAP)::SelectObject(hdcMem, 
                                (HBITMAP)(m_hObject)); 
    // Blt the bits. 
    ::BitBlt(hDC, 
             x, y, 
             GetWidth(), GetHeight(), 
             hdcMem, 
             0, 0, 
             SRCCOPY); 
    ::SelectObject(hdcMem, hbmold); 
    ::DeleteDC(hdcMem);  
} 
 
void CZipBitmap::Draw(HDC hDC, int x, int y,int height,int width) 
{ 
    ASSERT(hDC); 
    // Create a memory DC. 
    HDC hdcMem = ::CreateCompatibleDC(hDC); 
    // Select the bitmap into the mem DC. 
    HBITMAP hbmold =  
        (HBITMAP)::SelectObject(hdcMem, 
                                (HBITMAP)(m_hObject)); 
    // Blt the bits. 
	::StretchBlt(hDC, 
             x, y, 
             width, height, 
             hdcMem, 
             0, 0,GetWidth(),GetHeight(), 
             SRCCOPY); 
/*    ::BitBlt(hDC, 
             x, y, 
             width, height, 
             hdcMem, 
             0, 0, 
             SRCCOPY);*/ 
    ::SelectObject(hdcMem, hbmold); 
    ::DeleteDC(hdcMem);  
} 
 
void CZipBitmap::CreateMask(HDC hDC) 
{ 
    // Nuke any existing mask. 
    if (m_hbmMask) { 
        ::DeleteObject(m_hbmMask); 
    } 
    // Create memory DCs to work with. 
    HDC hdcMask = ::CreateCompatibleDC(hDC); 
    HDC hdcImage = ::CreateCompatibleDC(hDC); 
    // Create a monochrome bitmap for the mask. 
    m_hbmMask = ::CreateBitmap(GetWidth(), 
                               GetHeight(), 
                               1, 
                               1, 
                               NULL); 
    // Select the mono bitmap into its DC. 
    HBITMAP hbmOldMask = (HBITMAP)::SelectObject(hdcMask, m_hbmMask); 
    // Select the image bitmap into its DC. 
    HBITMAP hbmOldImage = (HBITMAP)::SelectObject(hdcImage, m_hObject); 
    // Set the transparency color to be the top-left pixel. 
    ::SetBkColor(hdcImage, ::GetPixel(hdcImage, 0, 0)); 
    // Make the mask. 
    ::BitBlt(hdcMask, 
             0, 0, 
             GetWidth(), GetHeight(), 
             hdcImage, 
             0, 0, 
             SRCCOPY); 
    // Tidy up. 
    ::SelectObject(hdcMask, hbmOldMask); 
    ::SelectObject(hdcImage, hbmOldImage); 
    ::DeleteDC(hdcMask); 
    ::DeleteDC(hdcImage); 
} 
void CZipBitmap::DrawTrans(HDC hDC, int x, int y) 
{ 
    ASSERT(hDC); 
    if (!m_hbmMask) CreateMask(hDC); 
    ASSERT(m_hbmMask); 
    int dx = GetWidth(); 
    int dy = GetHeight(); 
 
    // Create a memory DC to which to draw. 
    HDC hdcOffScr = ::CreateCompatibleDC(hDC); 
    // Create a bitmap for the off-screen DC that is really 
    // color-compatible with the destination DC. 
    HBITMAP hbmOffScr = ::CreateBitmap(dx, dy,  
                             (BYTE)GetDeviceCaps(hDC, PLANES), 
                             (BYTE)GetDeviceCaps(hDC, BITSPIXEL), 
                             NULL); 
    // Select the buffer bitmap into the off-screen DC. 
    HBITMAP hbmOldOffScr = (HBITMAP)::SelectObject(hdcOffScr, hbmOffScr); 
 
    // Copy the image of the destination rectangle to the 
    // off-screen buffer DC, so we can play with it. 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy, hDC, x, y, SRCCOPY); 
 
    // Create a memory DC for the source image. 
    HDC hdcImage = ::CreateCompatibleDC(hDC);  
    HBITMAP hbmOldImage = (HBITMAP)::SelectObject(hdcImage, m_hObject); 
 
    // Create a memory DC for the mask. 
    HDC hdcMask = ::CreateCompatibleDC(hDC); 
    HBITMAP hbmOldMask = (HBITMAP)::SelectObject(hdcMask, m_hbmMask); 
 
	DWORD DSx = SRCINVERT,DSa = SRCAND; 
 
    // XOR the image with the destination. 
    ::SetBkColor(hdcOffScr,rgbWhite); 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy ,hdcImage, 0, 0, DSx); 
    // AND the destination with the mask. 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy, hdcMask, 0,0, DSa); 
    // XOR the destination with the image again. 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy, hdcImage, 0, 0, DSx); 
 
    // Copy the resultant image back to the screen DC. 
    ::BitBlt(hDC, x, y, dx, dy, hdcOffScr, 0, 0, SRCCOPY); 
    // Tidy up. 
    ::SelectObject(hdcOffScr, hbmOldOffScr); 
    ::SelectObject(hdcImage, hbmOldImage); 
    ::SelectObject(hdcMask, hbmOldMask); 
    ::DeleteObject(hbmOffScr); 
    ::DeleteDC(hdcOffScr); 
    ::DeleteDC(hdcImage); 
    ::DeleteDC(hdcMask); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CZipBitmap message handlers 
 
void CZipBitmap::DrawTrans(HDC hDC, int x, int y, COLORREF colTrans) 
{ 
    ASSERT(hDC); 
    if (!m_hbmMask) CreateMask(hDC,colTrans); 
    ASSERT(m_hbmMask); 
    int dx = GetWidth(); 
    int dy = GetHeight(); 
 
    // Create a memory DC to which to draw. 
    HDC hdcOffScr = ::CreateCompatibleDC(hDC); 
    // Create a bitmap for the off-screen DC that is really 
    // color-compatible with the destination DC. 
    HBITMAP hbmOffScr = ::CreateBitmap(dx, dy,  
                             (BYTE)GetDeviceCaps(hDC, PLANES), 
                             (BYTE)GetDeviceCaps(hDC, BITSPIXEL), 
                             NULL); 
    // Select the buffer bitmap into the off-screen DC. 
    HBITMAP hbmOldOffScr = (HBITMAP)::SelectObject(hdcOffScr, hbmOffScr); 
 
    // Copy the image of the destination rectangle to the 
    // off-screen buffer DC, so we can play with it. 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy, hDC, x, y, SRCCOPY); 
 
    // Create a memory DC for the source image. 
    HDC hdcImage = ::CreateCompatibleDC(hDC);  
    HBITMAP hbmOldImage = (HBITMAP)::SelectObject(hdcImage, m_hObject); 
 
    // Create a memory DC for the mask. 
    HDC hdcMask = ::CreateCompatibleDC(hDC); 
    HBITMAP hbmOldMask = (HBITMAP)::SelectObject(hdcMask, m_hbmMask); 
 
	DWORD DSx = SRCINVERT,DSa = SRCAND; 
 
    // XOR the image with the destination. 
    ::SetBkColor(hdcOffScr,rgbWhite); 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy ,hdcImage, 0, 0, DSx); 
    // AND the destination with the mask. 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy, hdcMask, 0,0, DSa); 
    // XOR the destination with the image again. 
    ::BitBlt(hdcOffScr, 0, 0, dx, dy, hdcImage, 0, 0, DSx); 
 
    // Copy the resultant image back to the screen DC. 
    ::BitBlt(hDC, x, y, dx, dy, hdcOffScr, 0, 0, SRCCOPY); 
    // Tidy up. 
    ::SelectObject(hdcOffScr, hbmOldOffScr); 
    ::SelectObject(hdcImage, hbmOldImage); 
    ::SelectObject(hdcMask, hbmOldMask); 
    ::DeleteObject(hbmOffScr); 
    ::DeleteDC(hdcOffScr); 
    ::DeleteDC(hdcImage); 
    ::DeleteDC(hdcMask); 
} 
void CZipBitmap::CreateMask(HDC hDC, COLORREF colTrans) 
{ 
    // Nuke any existing mask. 
    if (m_hbmMask) { 
        ::DeleteObject(m_hbmMask); 
    } 
    // Create memory DCs to work with. 
    HDC hdcMask = ::CreateCompatibleDC(hDC); 
    HDC hdcImage = ::CreateCompatibleDC(hDC); 
    // Create a monochrome bitmap for the mask. 
    m_hbmMask = ::CreateBitmap(GetWidth(), 
                               GetHeight(), 
                               1, 
                               1, 
                               NULL); 
    // Select the mono bitmap into its DC. 
    HBITMAP hbmOldMask = (HBITMAP)::SelectObject(hdcMask, m_hbmMask); 
    // Select the image bitmap into its DC. 
    HBITMAP hbmOldImage = (HBITMAP)::SelectObject(hdcImage, m_hObject); 
    // Set the transparency color to be the top-left pixel. 
    ::SetBkColor(hdcImage,colTrans); 
    // Make the mask. 
    ::BitBlt(hdcMask, 
             0, 0, 
             GetWidth(), GetHeight(), 
             hdcImage, 
             0, 0, 
             SRCCOPY); 
    // Tidy up. 
    ::SelectObject(hdcMask, hbmOldMask); 
    ::SelectObject(hdcImage, hbmOldImage); 
    ::DeleteDC(hdcMask); 
    ::DeleteDC(hdcImage); 
}