cpi_image.c

VC++视频开发实例集锦(包括“远程视频监控”"语音识别系统"等13个经典例子)

#include "stdafx.h"
#include "globals.h"
#include "CompositeFile.h"


//
CPs_Image* CPIG_CreateImage_FromFile(const char* pcFilename)
{
    HBITMAP hbmLoad;
    BITMAP bmLoad;
    CPs_Image* pNewImage;
    char cFilename[MAX_PATH];

    strcpy(cFilename, "P:\\Skin\\");
    strcat(cFilename, pcFilename);

    hbmLoad = LoadImage(NULL, cFilename, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
    if(!hbmLoad)
        return NULL;

    GetObject(hbmLoad, sizeof(bmLoad), &bmLoad);

    pNewImage = (CPs_Image*)malloc(sizeof(CPs_Image));
    pNewImage->m_hbmImage = hbmLoad;
    pNewImage->m_szSize.cx = bmLoad.bmWidth;
    pNewImage->m_szSize.cy = bmLoad.bmHeight;
    return pNewImage;
}
//
//
//
CPs_Image* CPIG_CreateImage_FromSubFile(CP_COMPOSITEFILE hmComposite, const char* pcSubFilename)
{
    void* pFileData;
    unsigned int iLength;
    BOOL bSucceeded;
    HBITMAP hbmLoad;
    SIZE szBitmap;
    CPs_Image* pNewImage;

    bSucceeded = CF_GetSubFile(hmComposite, pcSubFilename, &pFileData, &iLength);
    if(!bSucceeded)
        return NULL;

    {
        BITMAPFILEHEADER* pFileHeader = (BITMAPFILEHEADER*)pFileData;
        BITMAPINFO* pBitmapInfo;
        void* pBitmapBytes;
        HDC dcDisplay, dcDraw;

        if(pFileHeader->bfType != 0x4D42)
        {
            free(pFileData);
            return NULL;
        }

        pBitmapInfo = (BITMAPINFO*)(((BYTE*)pFileData) + sizeof(BITMAPFILEHEADER));
        pBitmapBytes = ((BYTE*)pFileData) + pFileHeader->bfOffBits;

        dcDisplay = GetDC(NULL);
        szBitmap.cx = pBitmapInfo->bmiHeader.biWidth;
        szBitmap.cy = pBitmapInfo->bmiHeader.biHeight;
        hbmLoad = CreateCompatibleBitmap(dcDisplay, szBitmap.cx, szBitmap.cy);
        dcDraw = CreateCompatibleDC(dcDisplay);
        ReleaseDC(NULL, dcDisplay);

        SetDIBits(dcDraw, hbmLoad, 0, pBitmapInfo->bmiHeader.biHeight,
                  pBitmapBytes, pBitmapInfo, DIB_RGB_COLORS);

        DeleteDC(dcDraw);
    }
    free(pFileData);

    pNewImage = (CPs_Image*)malloc(sizeof(CPs_Image));
    pNewImage->m_hbmImage = hbmLoad;
    pNewImage->m_szSize = szBitmap;
    return pNewImage;
}
//

CPs_Image* CPIG_CreateImage_FromResource(const UINT uiResourceID)
{
    HBITMAP hbmLoad;
    BITMAP bmLoad;
    CPs_Image* pNewImage;

    hbmLoad = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(uiResourceID));
    if(!hbmLoad)
        return NULL;

    GetObject(hbmLoad, sizeof(bmLoad), &bmLoad);

    pNewImage = (CPs_Image*)malloc(sizeof(CPs_Image));
    pNewImage->m_hbmImage = hbmLoad;
    pNewImage->m_szSize.cx = bmLoad.bmWidth;
    pNewImage->m_szSize.cy = bmLoad.bmHeight;
    return pNewImage;
}
//
//
//
CPs_Image_WithState* CPIG_CreateStateImage(CPs_Image* pSource, const int iNumStates)
{
    CPs_Image_WithState* pNewIS;
    int iStateIDX;

    CP_ASSERT( (iNumStates-1) <= igsLast);

    pNewIS = (CPs_Image_WithState*)malloc(sizeof(*pNewIS));
    pNewIS->m_pImage = pSource;
    pNewIS->m_iStateHeight = pSource->m_szSize.cy / iNumStates;
    memset(pNewIS->m_ptSource, 0, sizeof(pNewIS->m_ptSource));
    for(iStateIDX = 0; iStateIDX < iNumStates; iStateIDX++)
    {
        pNewIS->m_ptSource[iStateIDX].x = 0;
        pNewIS->m_ptSource[iStateIDX].y = iStateIDX * pNewIS->m_iStateHeight;
    }

    return pNewIS;
}
//
//
//
void CPIG_DestroyImage(CPs_Image* pImage)
{
    if(!pImage)
        return;

    CP_ASSERT(pImage->m_hbmImage);
    DeleteObject(pImage->m_hbmImage);
    free(pImage);
}
//
//
//
void CPIG_DestroyImage_WithState(CPs_Image_WithState* pImageWithState)
{
    if(!pImageWithState)
        return;

    CP_ASSERT(pImageWithState->m_pImage);

    CPIG_DestroyImage(pImageWithState->m_pImage);
    free(pImageWithState);
}
//
//
//
void CPIG_DrawStateImage(CPs_DrawContext* pDC, const int iX, const int iY, CPs_Image_WithState* pSource, const CPe_ImageState enState)
{
    HDC dcCompat;
    HBITMAP bmOld;
    CP_CHECKOBJECT(pSource);

    dcCompat = CreateCompatibleDC(pDC->m_dcDraw);
    bmOld = (HBITMAP)SelectObject(dcCompat, pSource->m_pImage->m_hbmImage);
    SetBkColor(dcCompat, glb_pSkin->m_clrTransparent);
    BitBlt(pDC->m_dcDraw, iX + pDC->m_ptOffset.x, iY + pDC->m_ptOffset.y, pSource->m_pImage->m_szSize.cx, pSource->m_iStateHeight,
           dcCompat, pSource->m_ptSource[enState].x, pSource->m_ptSource[enState].y, SRCCOPY);
    SelectObject(dcCompat, bmOld);
    DeleteDC(dcCompat);
}
//
//
//
void CPIG_DrawImage(CPs_DrawContext* pDC, const int iX, const int iY, CPs_Image* pSource)
{
    HDC dcCompat;
    HBITMAP bmOld;
    CP_CHECKOBJECT(pSource);

    dcCompat = CreateCompatibleDC(pDC->m_dcDraw);
    bmOld = (HBITMAP)SelectObject(dcCompat, pSource->m_hbmImage);
    SetBkColor(dcCompat, glb_pSkin->m_clrTransparent);
    BitBlt(pDC->m_dcDraw, iX + pDC->m_ptOffset.x, iY + pDC->m_ptOffset.y, pSource->m_szSize.cx, pSource->m_szSize.cy, dcCompat, 0, 0, SRCCOPY);
    SelectObject(dcCompat, bmOld);
    DeleteDC(dcCompat);
}
//
//
//
void CPIG_TiledFill(CPs_DrawContext* pDC, const RECT* _prTarget, const RECT* prSourceRect, CPs_Image* pSourceImage, const DWORD dwOptions)
{
    HDC dcCompat;
    HBITMAP bmOld;
    RECT rSourceBorders;
    RECT rTarget;
    RECT rLocalClip;
    CP_CHECKOBJECT(pSourceImage);

    if(_prTarget->right < pDC->m_rClip.left
            || _prTarget->bottom < pDC->m_rClip.top
            || _prTarget->left > pDC->m_rClip.right
            || _prTarget->top > pDC->m_rClip.bottom)
    {
        return;
    }

    rTarget = *_prTarget;
    OffsetRect(&rTarget, pDC->m_ptOffset.x, pDC->m_ptOffset.y);
    rLocalClip = pDC->m_rClip;
    OffsetRect(&rLocalClip, pDC->m_ptOffset.x, pDC->m_ptOffset.y);

    dcCompat = CreateCompatibleDC(pDC->m_dcDraw);
    bmOld = (HBITMAP)SelectObject(dcCompat, pSourceImage->m_hbmImage);
    SetBkColor(dcCompat, glb_pSkin->m_clrTransparent);

    rSourceBorders.left = prSourceRect->left;
    rSourceBorders.right = pSourceImage->m_szSize.cx - prSourceRect->right;
    rSourceBorders.top = prSourceRect->top;
    rSourceBorders.bottom = pSourceImage->m_szSize.cy - prSourceRect->bottom;

    if(rSourceBorders.top > 0
            && ((rTarget.top+rSourceBorders.top) >= rLocalClip.top && rTarget.top <= rLocalClip.bottom))
    {
        BitBlt(pDC->m_dcDraw, rTarget.left, rTarget.top, rSourceBorders.left, rSourceBorders.top, dcCompat, 0, 0, SRCCOPY);
        BitBlt(pDC->m_dcDraw, rTarget.right - rSourceBorders.right, rTarget.top,
               rSourceBorders.right, rSourceBorders.top,
               dcCompat, prSourceRect->right, 0, SRCCOPY);

        if(prSourceRect->left < prSourceRect->right)
        {
            int iSourceCursorPos;
            int iTileWidth;
            int iEndCol;

            iSourceCursorPos = rSourceBorders.left + rTarget.left;
            iEndCol = rTarget.right-rSourceBorders.right;
            while(iSourceCursorPos < iEndCol)
            {
                iTileWidth = (prSourceRect->right - prSourceRect->left);
                if( (iSourceCursorPos + iTileWidth) > iEndCol)
                    iTileWidth = iEndCol - iSourceCursorPos;

                BitBlt(pDC->m_dcDraw, iSourceCursorPos, rTarget.top,
                       iTileWidth, rSourceBorders.top,
                       dcCompat, prSourceRect->left, 0, SRCCOPY);

                iSourceCursorPos += iTileWidth;
            }
        }
    }

    if(rSourceBorders.bottom > 0
            && (rTarget.bottom >= rLocalClip.top && (rTarget.bottom-rSourceBorders.bottom) <= rLocalClip.bottom) )
    {
        BitBlt(pDC->m_dcDraw, rTarget.left, rTarget.bottom - rSourceBorders.bottom,
               rSourceBorders.left, rSourceBorders.bottom, dcCompat, 0, prSourceRect->bottom, SRCCOPY);
        BitBlt(pDC->m_dcDraw, rTarget.right - rSourceBorders.right, rTarget.bottom - rSourceBorders.bottom,
               rSourceBorders.right, rSourceBorders.bottom,
               dcCompat, prSourceRect->right, prSourceRect->bottom, SRCCOPY);

        if(prSourceRect->left < prSourceRect->right)
        {
            int iSourceCursorPos;
            int iTileWidth;
            int iEndCol;

            iSourceCursorPos = rSourceBorders.left + rTarget.left;
            iEndCol = rTarget.right-rSourceBorders.right;
            while(iSourceCursorPos < iEndCol)
            {
                iTileWidth = (prSourceRect->right - prSourceRect->left);
                if( (iSourceCursorPos + iTileWidth) > iEndCol)
                    iTileWidth = iEndCol - iSourceCursorPos;

                BitBlt(pDC->m_dcDraw, iSourceCursorPos, rTarget.bottom - rSourceBorders.bottom,
                       iTileWidth, rSourceBorders.bottom,
                       dcCompat, prSourceRect->left, prSourceRect->bottom, SRCCOPY);

                iSourceCursorPos += iTileWidth;
            }
        }
    }

    if(prSourceRect->top < prSourceRect->bottom
            && prSourceRect->bottom > prSourceRect->top)
    {
        int iSourceCursorPos_Y;
        int iTileHeight;
        int iEndRow;
        iSourceCursorPos_Y = rSourceBorders.top + rTarget.top;
        iEndRow = rTarget.bottom-rSourceBorders.bottom;
        while(iSourceCursorPos_Y < iEndRow)
        {
            iTileHeight = (prSourceRect->bottom - prSourceRect->top);
            if( (iSourceCursorPos_Y + iTileHeight) > iEndRow)
                iTileHeight = iEndRow - iSourceCursorPos_Y;

            if((iSourceCursorPos_Y+iTileHeight) >= rLocalClip.top && iSourceCursorPos_Y <= rLocalClip.bottom)
            {
                BitBlt(pDC->m_dcDraw, rTarget.left, iSourceCursorPos_Y, rSourceBorders.left, iTileHeight, dcCompat, 0, rSourceBorders.top, SRCCOPY);
                BitBlt(pDC->m_dcDraw, rTarget.right - rSourceBorders.right, iSourceCursorPos_Y,
                       rSourceBorders.right, iTileHeight,
                       dcCompat, prSourceRect->right, rSourceBorders.top, SRCCOPY);

                if(prSourceRect->left < prSourceRect->right
                        && (dwOptions & CIC_TILEDFILOPTIONS_NOCENTRE) == 0)
                {
                    int iSourceCursorPos;
                    int iTileWidth;
                    int iEndCol;

                    iSourceCursorPos = rSourceBorders.left + rTarget.left;
                    iEndCol = rTarget.right-rSourceBorders.right;
                    while(iSourceCursorPos < iEndCol)
                    {
                        iTileWidth = (prSourceRect->right - prSourceRect->left);
                        if( (iSourceCursorPos + iTileWidth) > iEndCol)
                            iTileWidth = iEndCol - iSourceCursorPos;

                        BitBlt(pDC->m_dcDraw, iSourceCursorPos, iSourceCursorPos_Y,
                               iTileWidth, iTileHeight,
                               dcCompat, prSourceRect->left, rSourceBorders.top, SRCCOPY);

                        iSourceCursorPos += iTileWidth;
                    }
                }
            }


            iSourceCursorPos_Y += iTileHeight;
        }
    }

    SelectObject(dcCompat, bmOld);
    DeleteDC(dcCompat);
}
//