多媒体编程

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Visual C++

bitmap2region.c：源码内容
							#include "stdafx.h"
#include "globals.h"
#define CPC_RECT_QUANTISE	4096
HRESULT path_create_link(LPCSTR lpszPathObj, LPSTR lpszPathLink,
                         LPSTR lpszDesc)
{
    HRESULT hres;
    IShellLink *psl;
    hres = CoCreateInstance(&CLSID_ShellLink, NULL,
                            CLSCTX_INPROC_SERVER, &IID_IShellLink, &psl);
    if (SUCCEEDED(hres)) {
        IPersistFile *ppf;
        psl->lpVtbl->SetPath(psl, lpszPathObj);
        psl->lpVtbl->SetDescription(psl, lpszDesc);
        hres = psl->lpVtbl->QueryInterface(psl, &IID_IPersistFile, &ppf);
        if (SUCCEEDED(hres)) {
            WORD    wsz[MAX_PATH];	
            MultiByteToWideChar(CP_ACP, 0, lpszPathLink, -1, wsz,
                                MAX_PATH);
            hres = ppf->lpVtbl->Save(ppf, wsz, TRUE);
            ppf->lpVtbl->Release(ppf);
        }
        psl->lpVtbl->Release(psl);
    }
    return hres;
}
HRGN main_bitmap_to_region(HBITMAP hBmp, COLORREF cTransparentColor)
{
    HRGN hRgn = NULL;
    DWORD* pBitmapBits = NULL;
    DWORD* pBitmapCursor;
    BITMAP bitmap;
    RGNDATA* pRGNData = NULL;
    RECT* pRectArray = NULL;
    int iLastRectIDX;
    int iRGNDataSize_Rects;
    int iRowIDX, iColIDX;
    DWORD dwTransMasked;
    BOOL bDetectedTransparentPixel;
    CP_ASSERT(hBmp);
    GetObject(hBmp, sizeof(bitmap), &bitmap);
    pBitmapBits = (DWORD*)malloc(sizeof(DWORD) * bitmap.bmWidth * bitmap.bmHeight);
    {
        BITMAPINFO bmi;
        HDC dc;
        memset(&bmi, 0, sizeof(bmi));
        bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
        bmi.bmiHeader.biPlanes = 1;
        bmi.bmiHeader.biBitCount = 32;
        bmi.bmiHeader.biCompression = BI_RGB;
        bmi.bmiHeader.biWidth = bitmap.bmWidth;
        bmi.bmiHeader.biHeight = -bitmap.bmHeight;
        dc = CreateCompatibleDC(NULL);
        GetDIBits(dc, hBmp, 0, bitmap.bmHeight, pBitmapBits, &bmi, DIB_RGB_COLORS);
        DeleteDC(dc);
    }
    dwTransMasked = cTransparentColor & 0x00FFFFFF;
    pBitmapCursor = pBitmapBits;
    iLastRectIDX = 0;
    iRGNDataSize_Rects = 0;
    bDetectedTransparentPixel = FALSE;
    for(iRowIDX =0; iRowIDX < bitmap.bmHeight; iRowIDX++)
    {
        BOOL bInStrip = FALSE;
        for(iColIDX =0; iColIDX < bitmap.bmWidth; iColIDX++, pBitmapCursor++)
        {
            if( (((*pBitmapCursor)&0x00FFFFFF)^dwTransMasked) == 0L)
            {
                bDetectedTransparentPixel = TRUE;
                if(bInStrip == TRUE)
                {
                    bInStrip = FALSE;
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].right = iColIDX;
                    iLastRectIDX++;
                }
            }
            else
            {
                if(bInStrip == FALSE)
                {
                    bInStrip = TRUE;
                    if(iLastRectIDX == iRGNDataSize_Rects)
                    {
                        iRGNDataSize_Rects += CPC_RECT_QUANTISE;
                        pRGNData = (RGNDATA*)realloc(pRGNData, sizeof(RGNDATAHEADER) + (iRGNDataSize_Rects * sizeof(RECT)));
                    }
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].left = iColIDX;
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].top = iRowIDX;
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].bottom = iRowIDX+1;
                }
            }
        }
        if(bInStrip == TRUE)
        {
            ((RECT*)pRGNData->Buffer)[iLastRectIDX].right = bitmap.bmWidth;
            iLastRectIDX++;
        }
    }
    free(pBitmapBits);
    if(bDetectedTransparentPixel == TRUE)
    {
        pRGNData->rdh.dwSize = sizeof(RGNDATAHEADER);
        pRGNData->rdh.iType = RDH_RECTANGLES;
        pRGNData->rdh.nCount = iLastRectIDX;
        pRGNData->rdh.nRgnSize = sizeof(RGNDATAHEADER) + (iLastRectIDX * sizeof(RECT));
        pRGNData->rdh.rcBound.left = 0;
        pRGNData->rdh.rcBound.top = 0;
        pRGNData->rdh.rcBound.right = bitmap.bmWidth;
        pRGNData->rdh.rcBound.bottom = bitmap.bmHeight;
        hRgn = ExtCreateRegion(NULL, pRGNData->rdh.nRgnSize, pRGNData);
    }
    if(pRGNData)
        free(pRGNData);
    return hRgn;
}
HRGN main_bitmap_to_region_1bit(HBITMAP hBmp, COLORREF cTransparentColor)
{
    HRGN hRgn = NULL;
    BYTE* pBitmapBits = NULL;
    BYTE* pBitmapCursor;
    BITMAP bitmap;
    RGNDATA* pRGNData = NULL;
    RECT* pRectArray = NULL;
    int iStride;
    int iLastRectIDX;
    int iRGNDataSize_Rects;
    int iEndofLineCorrection;
    int iRowIDX, iColIDX;
    DWORD dwTransMask;
    BOOL bDetectedTransparentPixel;
    CP_ASSERT(hBmp);
    GetObject(hBmp, sizeof(bitmap), &bitmap);
    iStride = bitmap.bmWidth >> 3;
    if(bitmap.bmWidth & 0x7)
        iStride++;
    if(iStride&0x3)
    {
        iEndofLineCorrection = 0x4 - (iStride&0x3);
        iStride += iEndofLineCorrection;
    }
    else
        iEndofLineCorrection = 0;
    pBitmapBits = (BYTE*)malloc(iStride * bitmap.bmHeight);
    {
        BITMAPINFO* pBMI;
        HDC dc;
        pBMI = malloc(sizeof(BITMAPINFO) + (sizeof(RGBQUAD)<<1));
        memset(pBMI, 0, sizeof(*pBMI));
        pBMI->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
        pBMI->bmiHeader.biPlanes = 1;
        pBMI->bmiHeader.biBitCount = 1;
        pBMI->bmiHeader.biCompression = BI_RGB;
        pBMI->bmiHeader.biWidth = bitmap.bmWidth;
        pBMI->bmiHeader.biHeight = -bitmap.bmHeight;
        pBMI->bmiHeader.biSizeImage = iStride * bitmap.bmHeight;
        dc = CreateCompatibleDC(NULL);
        GetDIBits(dc, hBmp, 0, bitmap.bmHeight, pBitmapBits, pBMI, DIB_RGB_COLORS);
        free(pBMI);
        DeleteDC(dc);
    }
    bDetectedTransparentPixel = FALSE;
    pBitmapCursor = pBitmapBits;
    iLastRectIDX = 0;
    iRGNDataSize_Rects = 0;
    dwTransMask = 0x80;
    for(iRowIDX =0; iRowIDX < bitmap.bmHeight; iRowIDX++)
    {
        BOOL bInStrip = FALSE;
        for(iColIDX =0; iColIDX < bitmap.bmWidth; iColIDX++)
        {
            if( (*pBitmapCursor) & dwTransMask)
            {
                bDetectedTransparentPixel = TRUE;
                if(bInStrip == TRUE)
                {
                    bInStrip = FALSE;
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].right = iColIDX;
                    iLastRectIDX++;
                }
            }
            else
            {
                if(bInStrip == FALSE)
                {
                    bInStrip = TRUE;
                    if(iLastRectIDX == iRGNDataSize_Rects)
                    {
                        iRGNDataSize_Rects += CPC_RECT_QUANTISE;
                        pRGNData = (RGNDATA*)realloc(pRGNData, sizeof(RGNDATAHEADER) + (iRGNDataSize_Rects * sizeof(RECT)));
                    }
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].left = iColIDX;
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].top = iRowIDX;
                    ((RECT*)pRGNData->Buffer)[iLastRectIDX].bottom = iRowIDX+1;
                }
            }
            dwTransMask >>= 1;
            if(!dwTransMask)
            {
                dwTransMask = 0x80;
                pBitmapCursor++;
            }
        }
        if(bInStrip == TRUE)
        {
            ((RECT*)pRGNData->Buffer)[iLastRectIDX].right = bitmap.bmWidth;
            iLastRectIDX++;
        }
        if(dwTransMask != 0x80)
            pBitmapCursor++;
        dwTransMask = 0x80;
        pBitmapCursor += iEndofLineCorrection;
    }
    free(pBitmapBits);
    if(bDetectedTransparentPixel == TRUE)
    {
        pRGNData->rdh.dwSize = sizeof(RGNDATAHEADER);
        pRGNData->rdh.iType = RDH_RECTANGLES;
        pRGNData->rdh.nCount = iLastRectIDX;
        pRGNData->rdh.nRgnSize = sizeof(RGNDATAHEADER) + (iLastRectIDX * sizeof(RECT));
        pRGNData->rdh.rcBound.left = 0;
        pRGNData->rdh.rcBound.top = 0;
        pRGNData->rdh.rcBound.right = bitmap.bmWidth;
        pRGNData->rdh.rcBound.bottom = bitmap.bmHeight;
        hRgn = ExtCreateRegion(NULL, pRGNData->rdh.nRgnSize, pRGNData);
    }
    if(pRGNData)
        free(pRGNData);
    return hRgn;
}

						