C++ release_dc_ptr函数代码示例

/***********************************************************************
 *           PEN_SelectObject
 */
static HGDIOBJ PEN_SelectObject( HGDIOBJ handle, HDC hdc )
{
    PHYSDEV physdev;
    HGDIOBJ ret = 0;
    DC *dc = get_dc_ptr( hdc );

    if (!dc)
    {
        SetLastError( ERROR_INVALID_HANDLE );
        return 0;
    }

    if (!GDI_inc_ref_count( handle ))
    {
        release_dc_ptr( dc );
        return 0;
    }

    physdev = GET_DC_PHYSDEV( dc, pSelectPen );
    if (!physdev->funcs->pSelectPen( physdev, handle ))
    {
        GDI_dec_ref_count( handle );
    }
    else
    {
        ret = dc->hPen;
        dc->hPen = handle;
        GDI_dec_ref_count( ret );
    }
    release_dc_ptr( dc );
    return ret;
}

/******************************************************************************
 *           GdiAlphaBlend [[email protected]]
 */
BOOL WINAPI GdiAlphaBlend(HDC hdcDst, int xDst, int yDst, int widthDst, int heightDst,
                          HDC hdcSrc, int xSrc, int ySrc, int widthSrc, int heightSrc,
                          BLENDFUNCTION blendFunction)
{
    BOOL ret = FALSE;
    DC *dcDst, *dcSrc;

    TRACE( "%p %d,%d %dx%d -> %p %d,%d %dx%d op=%02x flags=%02x srcconstalpha=%02x alphafmt=%02x\n",
           hdcSrc, xSrc, ySrc, widthSrc, heightSrc, hdcDst, xDst, yDst, widthDst, heightDst,
           blendFunction.BlendOp, blendFunction.BlendFlags,
           blendFunction.SourceConstantAlpha, blendFunction.AlphaFormat );

    dcSrc = get_dc_ptr( hdcSrc );
    if (!dcSrc) return FALSE;

    if ((dcDst = get_dc_ptr( hdcDst )))
    {
        PHYSDEV src_dev = GET_DC_PHYSDEV( dcSrc, pAlphaBlend );
        PHYSDEV dst_dev = GET_DC_PHYSDEV( dcDst, pAlphaBlend );
        update_dc( dcSrc );
        update_dc( dcDst );
        ret = dst_dev->funcs->pAlphaBlend( dst_dev, xDst, yDst, widthDst, heightDst,
                                           src_dev, xSrc, ySrc, widthSrc, heightSrc, blendFunction );
        release_dc_ptr( dcDst );
    }
    release_dc_ptr( dcSrc );
    return ret;
}

/***********************************************************************
 *		wglMakeContextCurrentARB
 */
static BOOL WINAPI wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
{
    BOOL ret = FALSE;
    PHYSDEV draw_physdev, read_physdev;
    DC *DrawDC;
    DC *ReadDC;

    TRACE("hDrawDC: (%p), hReadDC: (%p) hglrc: (%p)\n", hDrawDC, hReadDC, hglrc);

    /* Both hDrawDC and hReadDC need to be valid */
    DrawDC = get_dc_ptr( hDrawDC );
    if (!DrawDC) return FALSE;

    ReadDC = get_dc_ptr( hReadDC );
    if (!ReadDC) {
        release_dc_ptr( DrawDC );
        return FALSE;
    }

    update_dc( DrawDC );
    update_dc( ReadDC );
    draw_physdev = GET_DC_PHYSDEV( DrawDC, pwglMakeContextCurrentARB );
    read_physdev = GET_DC_PHYSDEV( ReadDC, pwglMakeContextCurrentARB );
    if (draw_physdev->funcs == read_physdev->funcs)
        ret = draw_physdev->funcs->pwglMakeContextCurrentARB(draw_physdev, read_physdev, hglrc);
    release_dc_ptr( DrawDC );
    release_dc_ptr( ReadDC );
    return ret;
}

/***********************************************************************
 *           StretchBlt    ([email protected])
 */
BOOL WINAPI StretchBlt( HDC hdcDst, INT xDst, INT yDst, INT widthDst, INT heightDst,
                        HDC hdcSrc, INT xSrc, INT ySrc, INT widthSrc, INT heightSrc, DWORD rop )
{
    BOOL ret = FALSE;
    DC *dcDst, *dcSrc;

    if (!rop_uses_src( rop )) return PatBlt( hdcDst, xDst, yDst, widthDst, heightDst, rop );

    TRACE("%p %d,%d %dx%d -> %p %d,%d %dx%d rop=%06x\n",
          hdcSrc, xSrc, ySrc, widthSrc, heightSrc,
          hdcDst, xDst, yDst, widthDst, heightDst, rop );

    if (!(dcDst = get_dc_ptr( hdcDst ))) return FALSE;

    if ((dcSrc = get_dc_ptr( hdcSrc )))
    {
        PHYSDEV src_dev = GET_DC_PHYSDEV( dcSrc, pStretchBlt );
        PHYSDEV dst_dev = GET_DC_PHYSDEV( dcDst, pStretchBlt );
        update_dc( dcSrc );
        update_dc( dcDst );
        ret = dst_dev->funcs->pStretchBlt( dst_dev, xDst, yDst, widthDst, heightDst,
                                           src_dev, xSrc, ySrc, widthSrc, heightSrc, rop );
        release_dc_ptr( dcSrc );
    }
    release_dc_ptr( dcDst );
    return ret;
}

/***********************************************************************
 * GetNearestColor [[email protected]]
 *
 * Gets a system color to match.
 *
 * RETURNS
 *    Success: Color from system palette that corresponds to given color
 *    Failure: CLR_INVALID
 */
COLORREF WINAPI GetNearestColor(
    HDC hdc,      /* [in] Handle of device context */
    COLORREF color) /* [in] Color to be matched */
{
    unsigned char spec_type;
    COLORREF nearest;
    DC 		*dc;

    if (!(dc = get_dc_ptr( hdc ))) return CLR_INVALID;

    if (dc->funcs->pGetNearestColor)
    {
        nearest = dc->funcs->pGetNearestColor( dc->physDev, color );
        release_dc_ptr( dc );
        return nearest;
    }

    if (!(GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE))
    {
        release_dc_ptr( dc );
        return color;
    }

    spec_type = color >> 24;
    if (spec_type == 1 || spec_type == 2)
    {
        /* we need logical palette for PALETTERGB and PALETTEINDEX colorrefs */

        UINT index;
        PALETTEENTRY entry;
        HPALETTE hpal = dc->hPalette ? dc->hPalette : GetStockObject( DEFAULT_PALETTE );

        if (spec_type == 2) /* PALETTERGB */
            index = GetNearestPaletteIndex( hpal, color );
        else  /* PALETTEINDEX */
            index = LOWORD(color);

        if (!GetPaletteEntries( hpal, index, 1, &entry ))
        {
            WARN("RGB(%x) : idx %d is out of bounds, assuming NULL\n", color, index );
            if (!GetPaletteEntries( hpal, 0, 1, &entry ))
            {
                release_dc_ptr( dc );
                return CLR_INVALID;
            }
        }
        color = RGB( entry.peRed, entry.peGreen, entry.peBlue );
    }
    nearest = color & 0x00ffffff;
    release_dc_ptr( dc );

    TRACE("(%06x): returning %06x\n", color, nearest );
    return nearest;
}

/***********************************************************************
 *           StretchBlt    ([email protected])
 */
BOOL WINAPI StretchBlt( HDC hdcDst, INT xDst, INT yDst, INT widthDst, INT heightDst,
                        HDC hdcSrc, INT xSrc, INT ySrc, INT widthSrc, INT heightSrc, DWORD rop )
{
    BOOL ret = FALSE;
    DC *dcDst, *dcSrc;

    if (!rop_uses_src( rop )) return PatBlt( hdcDst, xDst, yDst, widthDst, heightDst, rop );

    if (!(dcDst = get_dc_ptr( hdcDst ))) return FALSE;

    if ((dcSrc = get_dc_ptr( hdcSrc )))
    {
        struct bitblt_coords src, dst;

        update_dc( dcSrc );
        update_dc( dcDst );

        src.log_x      = xSrc;
        src.log_y      = ySrc;
        src.log_width  = widthSrc;
        src.log_height = heightSrc;
        src.layout     = dcSrc->layout;
        dst.log_x      = xDst;
        dst.log_y      = yDst;
        dst.log_width  = widthDst;
        dst.log_height = heightDst;
        dst.layout     = dcDst->layout;
        if (rop & NOMIRRORBITMAP)
        {
            src.layout |= LAYOUT_BITMAPORIENTATIONPRESERVED;
            dst.layout |= LAYOUT_BITMAPORIENTATIONPRESERVED;
            rop &= ~NOMIRRORBITMAP;
        }
        ret = !get_vis_rectangles( dcDst, &dst, dcSrc, &src );

        TRACE("src %p log=%d,%d %dx%d phys=%d,%d %dx%d vis=%s  dst %p log=%d,%d %dx%d phys=%d,%d %dx%d vis=%s  rop=%06x\n",
              hdcSrc, src.log_x, src.log_y, src.log_width, src.log_height,
              src.x, src.y, src.width, src.height, wine_dbgstr_rect(&src.visrect),
              hdcDst, dst.log_x, dst.log_y, dst.log_width, dst.log_height,
              dst.x, dst.y, dst.width, dst.height, wine_dbgstr_rect(&dst.visrect), rop );

        if (!ret)
        {
            PHYSDEV src_dev = GET_DC_PHYSDEV( dcSrc, pStretchBlt );
            PHYSDEV dst_dev = GET_DC_PHYSDEV( dcDst, pStretchBlt );
            ret = dst_dev->funcs->pStretchBlt( dst_dev, &dst, src_dev, &src, rop );
        }
        release_dc_ptr( dcSrc );
    }
    release_dc_ptr( dcDst );
    return ret;
}

/***********************************************************************
 *           PEN_SelectObject
 */
static HGDIOBJ PEN_SelectObject( HGDIOBJ handle, HDC hdc )
{
    PENOBJ *pen;
    HGDIOBJ ret = 0;
    DC *dc = get_dc_ptr( hdc );
    WORD type;

    if (!dc)
    {
        SetLastError( ERROR_INVALID_HANDLE );
        return 0;
    }

    if ((pen = get_any_obj_ptr( handle, &type )))
    {
        struct brush_pattern *pattern;
        PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSelectPen );

        switch (type)
        {
        case OBJ_PEN:
            pattern = NULL;
            break;
        case OBJ_EXTPEN:
            pattern = &pen->pattern;
            if (!pattern->info) pattern = NULL;
            break;
        default:
            GDI_ReleaseObj( handle );
            release_dc_ptr( dc );
            return 0;
        }

        GDI_inc_ref_count( handle );
        GDI_ReleaseObj( handle );

        if (!physdev->funcs->pSelectPen( physdev, handle, pattern ))
        {
            GDI_dec_ref_count( handle );
        }
        else
        {
            ret = dc->hPen;
            dc->hPen = handle;
            GDI_dec_ref_count( ret );
        }
    }
    release_dc_ptr( dc );
    return ret;
}

/**********************************************************************
 *          MFDRV_CloseMetaFile
 */
static DC *MFDRV_CloseMetaFile( HDC hdc )
{
    DC *dc;
    METAFILEDRV_PDEVICE *physDev;

    TRACE("(%p)\n", hdc );

    if (!(dc = get_dc_ptr( hdc ))) return NULL;
    if (dc->header.type != OBJ_METADC)
    {
        release_dc_ptr( dc );
        return NULL;
    }
    if (dc->refcount != 1)
    {
        FIXME( "not deleting busy DC %p refcount %u\n", hdc, dc->refcount );
        release_dc_ptr( dc );
        return NULL;
    }
    physDev = (METAFILEDRV_PDEVICE *)dc->physDev;

    /* Construct the end of metafile record - this is documented
     * in SDK Knowledgebase Q99334.
     */

    if (!MFDRV_MetaParam0(dc->physDev, META_EOF))
    {
        free_dc_ptr( dc );
	return 0;
    }

    if (physDev->mh->mtType == METAFILE_DISK)  /* disk based metafile */
    {
        if (SetFilePointer(physDev->hFile, 0, NULL, FILE_BEGIN) != 0) {
            free_dc_ptr( dc );
            return 0;
        }

	physDev->mh->mtType = METAFILE_MEMORY; /* This is what windows does */
        if (!WriteFile(physDev->hFile, physDev->mh, sizeof(*physDev->mh),
                       NULL, NULL)) {
            free_dc_ptr( dc );
            return 0;
        }
        CloseHandle(physDev->hFile);
	physDev->mh->mtType = METAFILE_DISK;
    }

    return dc;
}

/***********************************************************************
 *           SetMetaRgn    ([email protected])
 */
INT WINAPI SetMetaRgn( HDC hdc )
{
    INT ret;
    RECT dummy;
    DC *dc = get_dc_ptr( hdc );

    if (!dc) return ERROR;

    if (dc->hClipRgn)
    {
        if (dc->hMetaRgn)
        {
            /* the intersection becomes the new meta region */
            CombineRgn( dc->hMetaRgn, dc->hMetaRgn, dc->hClipRgn, RGN_AND );
            DeleteObject( dc->hClipRgn );
            dc->hClipRgn = 0;
        }
        else
        {
            dc->hMetaRgn = dc->hClipRgn;
            dc->hClipRgn = 0;
        }
    }
    /* else nothing to do */

    /* Note: no need to call update_dc_clipping, the overall clip region hasn't changed */

    ret = GetRgnBox( dc->hMetaRgn, &dummy );
    release_dc_ptr( dc );
    return ret;
}

/***********************************************************************
 *		wglMakeCurrent ([email protected])
 */
BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
{
    BOOL ret = FALSE;
    DC * dc = NULL;

    /* When the context hglrc is NULL, the HDC is ignored and can be NULL.
     * In that case use the global hDC to get access to the driver.  */
    if(hglrc == NULL)
    {
        if( hdc == NULL && !wglGetCurrentContext() )
        {
            WARN( "Current context is NULL\n");
            SetLastError( ERROR_INVALID_HANDLE );
            return FALSE;
        }
        dc = OPENGL_GetDefaultDC();
    }
    else
        dc = get_dc_ptr( hdc );

    TRACE("hdc: (%p), hglrc: (%p)\n", hdc, hglrc);

    if (dc)
    {
        PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglMakeCurrent );
        update_dc( dc );
        ret = physdev->funcs->pwglMakeCurrent( physdev, hglrc );
        release_dc_ptr( dc );
    }
    return ret;
}

/***********************************************************************
 *           SetVirtualResolution   ([email protected])
 *
 * Undocumented on msdn.
 *
 * Changes the values of screen size in pixels and millimeters used by
 * the mapping mode functions.
 *
 * PARAMS
 *     hdc       [I] Device context
 *     horz_res  [I] Width in pixels  (equivalent to HORZRES device cap).
 *     vert_res  [I] Height in pixels (equivalent to VERTRES device cap).
 *     horz_size [I] Width in mm      (equivalent to HORZSIZE device cap).
 *     vert_size [I] Height in mm     (equivalent to VERTSIZE device cap).
 *
 * RETURNS
 *    TRUE if successful.
 *    FALSE if any (but not all) of the last four params are zero.
 *
 * NOTES
 *    This doesn't change the values returned by GetDeviceCaps, just the
 *    scaling of the mapping modes.
 *
 *    Calling with the last four params equal to zero sets the values
 *    back to their defaults obtained by calls to GetDeviceCaps.
 */
BOOL WINAPI SetVirtualResolution(HDC hdc, DWORD horz_res, DWORD vert_res,
                                 DWORD horz_size, DWORD vert_size)
{
    DC * dc;
    TRACE("(%p %d %d %d %d)\n", hdc, horz_res, vert_res, horz_size, vert_size);

    if(horz_res == 0 && vert_res == 0 && horz_size == 0 && vert_size == 0)
    {
        horz_res  = GetDeviceCaps(hdc, HORZRES);
        vert_res  = GetDeviceCaps(hdc, VERTRES);
        horz_size = GetDeviceCaps(hdc, HORZSIZE);
        vert_size = GetDeviceCaps(hdc, VERTSIZE);
    }
    else if(horz_res == 0 || vert_res == 0 || horz_size == 0 || vert_size == 0)
        return FALSE;

    dc = get_dc_ptr( hdc );
    if (!dc) return FALSE;

    dc->virtual_res.cx  = horz_res;
    dc->virtual_res.cy  = vert_res;
    dc->virtual_size.cx = horz_size;
    dc->virtual_size.cy = vert_size;

    release_dc_ptr( dc );
    return TRUE;
}

/***********************************************************************
 *           GDISelectPalette    (Not a Windows API)
 */
HPALETTE WINAPI GDISelectPalette( HDC hdc, HPALETTE hpal, WORD wBkg)
{
    HPALETTE ret = 0;
    DC *dc;

    TRACE("%p %p\n", hdc, hpal );

    hpal = get_full_gdi_handle( hpal );
    if (GetObjectType(hpal) != OBJ_PAL)
    {
      WARN("invalid selected palette %p\n",hpal);
      return 0;
    }
    if ((dc = get_dc_ptr( hdc )))
    {
        PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSelectPalette );
        ret = dc->hPalette;
        if (physdev->funcs->pSelectPalette( physdev, hpal, FALSE ))
        {
            dc->hPalette = hpal;
            if (!wBkg) hPrimaryPalette = hpal;
        }
        else ret = 0;
        release_dc_ptr( dc );
    }
    return ret;
}

/***********************************************************************
 *		Internal wglGetProcAddress for retrieving WGL extensions
 */
PROC WINAPI wglGetProcAddress(LPCSTR func)
{
    PROC ret = NULL;
    DC *dc;

    if(!func)
	return NULL;

    TRACE("func: '%s'\n", func);

    /* Retrieve the global hDC to get access to the driver.  */
    dc = OPENGL_GetDefaultDC();
    if (dc)
    {
        PHYSDEV physdev = GET_DC_PHYSDEV( dc, pwglGetProcAddress );
        ret = physdev->funcs->pwglGetProcAddress(func);
        release_dc_ptr( dc );
    }

    /* At the moment we implement one WGL extension which requires a HDC. When we
     * are looking up this call and when the Extension is available (that is the case
     * when a non-NULL value is returned by wglGetProcAddress), we return the address
     * of a wrapper function which will handle the HDC->PhysDev conversion.
     */
    if(ret && strcmp(func, "wglCreateContextAttribsARB") == 0)
        return (PROC)wglCreateContextAttribsARB;
    else if(ret && strcmp(func, "wglMakeContextCurrentARB") == 0)
        return (PROC)wglMakeContextCurrentARB;
    else if(ret && strcmp(func, "wglGetPbufferDCARB") == 0)
        return (PROC)wglGetPbufferDCARB;
    else if(ret && strcmp(func, "wglSetPixelFormatWINE") == 0)
        return (PROC)wglSetPixelFormatWINE;

    return ret;
}

/***********************************************************************
 *           IntersectVisRect   (GDI.98)
 */
INT16 WINAPI IntersectVisRect16( HDC16 hdc16, INT16 left, INT16 top, INT16 right, INT16 bottom )
{
    HRGN tempRgn;
    INT16 ret;
    POINT pt[2];
    HDC hdc = HDC_32( hdc16 );
    DC * dc = get_dc_ptr( hdc );
    if (!dc) return ERROR;

    pt[0].x = left;
    pt[0].y = top;
    pt[1].x = right;
    pt[1].y = bottom;

    LPtoDP( hdc, pt, 2 );

    TRACE("%p %d,%d - %d,%d\n", hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);

    if (!(tempRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
    else
    {
        update_dc( dc );
        ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_AND );
        DeleteObject( tempRgn );
    }
    if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
    release_dc_ptr( dc );
    return ret;
}

/***********************************************************************
 *           GetClipBox    ([email protected])
 */
INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
{
    RECT visrect;
    INT ret;
    DC *dc = get_dc_ptr( hdc );
    if (!dc) return ERROR;

    update_dc( dc );
    if (get_dc_region( dc ))
    {
        ret = GetRgnBox( get_dc_region( dc ), rect );
    }
    else
    {
        ret = is_rect_empty( &dc->vis_rect ) ? ERROR : SIMPLEREGION;
        *rect = dc->vis_rect;
    }

    if (get_dc_device_rect( dc, &visrect ) && !intersect_rect( rect, rect, &visrect )) ret = NULLREGION;

    if (dc->layout & LAYOUT_RTL)
    {
        int tmp = rect->left;
        rect->left = rect->right - 1;
        rect->right = tmp - 1;
    }
    DPtoLP( hdc, (LPPOINT)rect, 2 );
    release_dc_ptr( dc );
    TRACE("%p => %d %s\n", hdc, ret, wine_dbgstr_rect( rect ));
    return ret;
}