C++ GDI_ReleaseObj函数代码示例

BOOL get_brush_bitmap_info( HBRUSH handle, BITMAPINFO *info, void **bits, UINT *usage )
{
    BRUSHOBJ *brush;
    BOOL ret = FALSE;

    if (!(brush = GDI_GetObjPtr( handle, OBJ_BRUSH ))) return FALSE;

    if (!brush->info)
    {
        BITMAPOBJ *bmp = GDI_GetObjPtr( brush->bitmap, OBJ_BITMAP );

        if (bmp)
        {
            store_bitmap_bits( brush, bmp );
            GDI_ReleaseObj( brush->bitmap );
        }
    }
    if (brush->info)
    {
        memcpy( info, brush->info, get_dib_info_size( brush->info, brush->usage ));
        if (info->bmiHeader.biBitCount <= 8 && !info->bmiHeader.biClrUsed)
            fill_default_color_table( info );
        *bits = brush->bits.ptr;
        *usage = brush->usage;
        ret = TRUE;
    }
    GDI_ReleaseObj( handle );
    return ret;
}

/***********************************************************************
 * SetPaletteEntries [[email protected]]
 *
 * Sets color values for range in palette.
 *
 * RETURNS
 *    Success: Number of entries that were set
 *    Failure: 0
 */
UINT WINAPI SetPaletteEntries(
    HPALETTE hpalette,    /* [in] Handle of logical palette */
    UINT start,           /* [in] Index of first entry to set */
    UINT count,           /* [in] Number of entries to set */
    const PALETTEENTRY *entries) /* [in] Address of array of structures */
{
    PALETTEOBJ * palPtr;
    UINT numEntries;

    TRACE("hpal=%p,start=%i,count=%i\n",hpalette,start,count );

    hpalette = get_full_gdi_handle( hpalette );
    if (hpalette == GetStockObject(DEFAULT_PALETTE)) return 0;
    palPtr = GDI_GetObjPtr( hpalette, OBJ_PAL );
    if (!palPtr) return 0;

    numEntries = palPtr->count;
    if (start >= numEntries)
    {
      GDI_ReleaseObj( hpalette );
      return 0;
    }
    if (start+count > numEntries) count = numEntries - start;
    memcpy( &palPtr->entries[start], entries, count * sizeof(PALETTEENTRY) );
    GDI_ReleaseObj( hpalette );
    UnrealizeObject( hpalette );
    return count;
}

/***********************************************************************
 *           DeleteObject    ([email protected])
 */
BOOL WINAPI DeleteObject( HGDIOBJ obj )
{
    /* Check if object is valid */

    GDIOBJHDR * header;
    if (HIWORD(obj)) return FALSE;

    if (!(header = GDI_GetObjPtr( obj, MAGIC_DONTCARE ))) return FALSE;

    if (!(header->wMagic & OBJECT_NOSYSTEM)
            &&   (header->wMagic >= FIRST_MAGIC) && (header->wMagic <= LAST_MAGIC))
    {
        TRACE("Preserving system object %04x\n", obj);
        GDI_ReleaseObj( obj );
        return TRUE;
    }

    if (header->dwCount)
    {
        TRACE("delayed for %04x because object in use, count %ld\n", obj, header->dwCount );
        header->dwCount |= 0x80000000; /* mark for delete */
        GDI_ReleaseObj( obj );
        return TRUE;
    }

    TRACE("%04x\n", obj );

    /* Delete object */

    switch(GDIMAGIC(header->wMagic))
    {
    case PEN_MAGIC:
        return GDI_FreeObject( obj, header );
    case BRUSH_MAGIC:
        return BRUSH_DeleteObject( obj, (BRUSHOBJ*)header );
    case FONT_MAGIC:
        return FONT_DeleteObject( obj, (FONTOBJ*)header );
    case PALETTE_MAGIC:
        return PALETTE_DeleteObject(obj,(PALETTEOBJ*)header);
    case BITMAP_MAGIC:
        return BITMAP_DeleteObject( obj, (BITMAPOBJ*)header);
    case REGION_MAGIC:
        return REGION_DeleteObject( obj, (RGNOBJ*)header );
    case DC_MAGIC:
        GDI_ReleaseObj( obj );
        return DeleteDC(obj);
    case 0 :
        WARN("Already deleted\n");
        break;
    default:
        WARN("Unknown magic number (%04x)\n",GDIMAGIC(header->wMagic));
    }
    GDI_ReleaseObj( obj );
    return FALSE;
}

static BOOL copy_bitmap( BRUSHOBJ *brush, HBITMAP bitmap )
{
    BITMAPINFO *info;
    BITMAPOBJ *bmp = GDI_GetObjPtr( bitmap, OBJ_BITMAP );

    if (!bmp) return FALSE;

    if (!bmp->dib)
    {
        if ((brush->bitmap = CreateBitmap( bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
                                           bmp->bitmap.bmPlanes, bmp->bitmap.bmBitsPixel, NULL )))
        {
            if (bmp->funcs->pCopyBitmap( bitmap, brush->bitmap ))
            {
                BITMAPOBJ *copy = GDI_GetObjPtr( brush->bitmap, OBJ_BITMAP );
                copy->funcs = bmp->funcs;
                GDI_ReleaseObj( copy );
            }
            else
            {
                DeleteObject( brush->bitmap );
                brush->bitmap = 0;
            }
        }
        GDI_ReleaseObj( bitmap );
        return brush->bitmap != 0;
    }

    info = HeapAlloc( GetProcessHeap(), 0,
                      get_dib_info_size( (BITMAPINFO *)&bmp->dib->dsBmih, DIB_RGB_COLORS ));
    if (!info) goto done;
    info->bmiHeader = bmp->dib->dsBmih;
    if (info->bmiHeader.biCompression == BI_BITFIELDS)
        memcpy( &info->bmiHeader + 1, bmp->dib->dsBitfields, sizeof(bmp->dib->dsBitfields) );
    else if (info->bmiHeader.biClrUsed)
        memcpy( &info->bmiHeader + 1, bmp->color_table, info->bmiHeader.biClrUsed * sizeof(RGBQUAD) );
    if (!(brush->bits.ptr = HeapAlloc( GetProcessHeap(), 0, info->bmiHeader.biSizeImage )))
    {
        HeapFree( GetProcessHeap(), 0, info );
        goto done;
    }
    memcpy( brush->bits.ptr, bmp->dib->dsBm.bmBits, info->bmiHeader.biSizeImage );
    brush->bits.is_copy = TRUE;
    brush->bits.free = free_heap_bits;
    brush->info = info;
    brush->usage = DIB_RGB_COLORS;

done:
    GDI_ReleaseObj( bitmap );
    return brush->info != NULL;
}

/***********************************************************************
 *           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;
}

/***********************************************************************
 *           BRUSH_SelectObject
 */
static HGDIOBJ BRUSH_SelectObject( HGDIOBJ handle, HDC hdc )
{
    BRUSHOBJ *brush;
    HGDIOBJ ret = 0;
    DC *dc = get_dc_ptr( hdc );

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

    if ((brush = GDI_GetObjPtr( handle, OBJ_BRUSH )))
    {
        PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSelectBrush );
        HBITMAP bitmap = brush->bitmap;
        BITMAPINFO *info;
        void *bits;
        UINT usage;

        if (bitmap && !brush->info)
        {
            BITMAPOBJ *bmp = GDI_GetObjPtr( bitmap, OBJ_BITMAP );
            /* fetch the bitmap bits if we are selecting into a different type of DC */
            if (bmp && bmp->funcs != physdev->funcs) store_bitmap_bits( brush, bmp );
            GDI_ReleaseObj( bitmap );
        }

        info   = brush->info;
        bits   = brush->bits.ptr;
        usage  = brush->usage;
        GDI_inc_ref_count( handle );
        GDI_ReleaseObj( handle );

        if (!physdev->funcs->pSelectBrush( physdev, handle, bitmap, info, bits, usage ))
        {
            GDI_dec_ref_count( handle );
        }
        else
        {
            ret = dc->hBrush;
            dc->hBrush = handle;
            GDI_dec_ref_count( ret );
        }
    }
    release_dc_ptr( dc );
    return ret;
}

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

    if (!dc) return ERROR;

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

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

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

/***********************************************************************
 *           CreatePenIndirect    ([email protected])
 */
HPEN WINAPI CreatePenIndirect( const LOGPEN * pen )
{
    PENOBJ * penPtr;
    HPEN hpen;

    if (!(penPtr = GDI_AllocObject( sizeof(PENOBJ), PEN_MAGIC, (HGDIOBJ *)&hpen,
				    &pen_funcs ))) return 0;
    if (pen->lopnStyle == PS_USERSTYLE || pen->lopnStyle == PS_ALTERNATE)
        penPtr->logpen.elpPenStyle = PS_SOLID;
    else
        penPtr->logpen.elpPenStyle = pen->lopnStyle;
    if (pen->lopnStyle == PS_NULL)
    {
        penPtr->logpen.elpWidth = 1;
        penPtr->logpen.elpColor = RGB(0, 0, 0);
    }
    else
    {
        penPtr->logpen.elpWidth = abs(pen->lopnWidth.x);
        penPtr->logpen.elpColor = pen->lopnColor;
    }
    penPtr->logpen.elpBrushStyle = BS_SOLID;
    penPtr->logpen.elpHatch = 0;
    penPtr->logpen.elpNumEntries = 0;
    penPtr->logpen.elpStyleEntry[0] = 0;

    GDI_ReleaseObj( hpen );
    return hpen;
}

/***********************************************************************
 *           EMFDRV_SelectObject
 */
HGDIOBJ EMFDRV_SelectObject( DC *dc, HGDIOBJ handle )
{
    GDIOBJHDR * ptr = GDI_GetObjPtr( handle, MAGIC_DONTCARE );
    HGDIOBJ ret = 0;

    if (!ptr) return 0;
    TRACE("hdc=%04x %04x\n", dc->hSelf, handle );

    switch(GDIMAGIC(ptr->wMagic))
    {
      case PEN_MAGIC:
	  ret = EMFDRV_PEN_SelectObject( dc, handle );
	  break;
      case BRUSH_MAGIC:
	  ret = EMFDRV_BRUSH_SelectObject( dc, handle );
	  break;
      case FONT_MAGIC:
	  ret = EMFDRV_FONT_SelectObject( dc, handle );
	  break;
      case BITMAP_MAGIC:
	  ret = EMFDRV_BITMAP_SelectObject( dc, handle );
	  break;
    }
    GDI_ReleaseObj( handle );
    return ret;
}

/***********************************************************************
 *           BITMAP_SetOwnerDC
 *
 * Set the type of DC that owns the bitmap. This is used when the
 * bitmap is selected into a device to initialize the bitmap function
 * table.
 */
static BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, PHYSDEV physdev )
{
    BITMAPOBJ *bitmap;
    BOOL ret = TRUE;

    /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
    if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;

    if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;

    if (!bitmap->dib && bitmap->funcs != physdev->funcs)
    {
        /* we can only change from the null driver to some other driver */
        if (bitmap->funcs == &null_driver)
        {
            if (physdev->funcs->pCreateBitmap)
            {
                ret = physdev->funcs->pCreateBitmap( physdev, hbitmap );
                if (ret)
                {
                    bitmap->funcs = physdev->funcs;
                    set_initial_bitmap_bits( hbitmap, bitmap );
                }
            }
            else bitmap->funcs = &dib_driver;  /* use the DIB driver to emulate DDB support */
        }
        else
        {
            FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
            ret = FALSE;
        }
    }
    GDI_ReleaseObj( hbitmap );
    return ret;
}

/***********************************************************************
 * GetNearestPaletteIndex [[email protected]]
 *
 * Gets palette index for color.
 *
 * NOTES
 *    Should index be initialized to CLR_INVALID instead of 0?
 *
 * RETURNS
 *    Success: Index of entry in logical palette
 *    Failure: CLR_INVALID
 */
UINT WINAPI GetNearestPaletteIndex(
    HPALETTE hpalette, /* [in] Handle of logical color palette */
    COLORREF color)      /* [in] Color to be matched */
{
    PALETTEOBJ* palObj = GDI_GetObjPtr( hpalette, OBJ_PAL );
    UINT index  = 0;

    if( palObj )
    {
        int i, diff = 0x7fffffff;
        int r,g,b;
        PALETTEENTRY* entry = palObj->entries;

        for( i = 0; i < palObj->count && diff ; i++, entry++)
        {
            r = entry->peRed - GetRValue(color);
            g = entry->peGreen - GetGValue(color);
            b = entry->peBlue - GetBValue(color);

            r = r*r + g*g + b*b;

            if( r < diff ) { index = i; diff = r; }
        }
        GDI_ReleaseObj( hpalette );
    }
    TRACE("(%p,%06x): returning %d\n", hpalette, color, index );
    return index;
}

/***********************************************************************
 *           BITMAP_GetObject
 */
static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
{
    INT ret;
    BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );

    if (!bmp) return 0;

    if (!buffer) ret = sizeof(BITMAP);
    else if (count < sizeof(BITMAP)) ret = 0;
    else if (bmp->dib)
    {
	if (count >= sizeof(DIBSECTION))
	{
            DIBSECTION *dib = buffer;
            *dib = *bmp->dib;
            dib->dsBmih.biHeight = abs( dib->dsBmih.biHeight );
            ret = sizeof(DIBSECTION);
	}
	else /* if (count >= sizeof(BITMAP)) */
        {
            DIBSECTION *dib = bmp->dib;
            memcpy( buffer, &dib->dsBm, sizeof(BITMAP) );
            ret = sizeof(BITMAP);
	}
    }
    else
    {
        memcpy( buffer, &bmp->bitmap, sizeof(BITMAP) );
        ((BITMAP *) buffer)->bmBits = NULL;
        ret = sizeof(BITMAP);
    }
    GDI_ReleaseObj( handle );
    return ret;
}

/*****************************************************************************
 *      @ [GDI32.104]
 *
 * This should load the correct driver for lpszDevice and calls this driver's
 * DeviceCapabilities proc.
 *
 * FIXME: convert DeviceCapabilities to unicode in the driver interface
 */
DWORD WINAPI GDI_CallDeviceCapabilities16( LPCSTR lpszDevice, LPCSTR lpszPort,
                                           WORD fwCapability, LPSTR lpszOutput,
                                           LPDEVMODEA lpdm )
{
    WCHAR deviceW[300];
    WCHAR bufW[300];
    char buf[300];
    HDC hdc;
    DC *dc;
    INT ret = -1;

    TRACE("(%s, %s, %d, %p, %p)\n", lpszDevice, lpszPort, fwCapability, lpszOutput, lpdm );

    if (!lpszDevice) return -1;
    if (!MultiByteToWideChar(CP_ACP, 0, lpszDevice, -1, deviceW, 300)) return -1;

    if(!DRIVER_GetDriverName( deviceW, bufW, 300 )) return -1;

    if (!WideCharToMultiByte(CP_ACP, 0, bufW, -1, buf, 300, NULL, NULL)) return -1;

    if (!(hdc = CreateICA( buf, lpszDevice, lpszPort, NULL ))) return -1;

    if ((dc = DC_GetDCPtr( hdc )))
    {
        if (dc->funcs->pDeviceCapabilities)
            ret = dc->funcs->pDeviceCapabilities( buf, lpszDevice, lpszPort,
                                                  fwCapability, lpszOutput, lpdm );
        GDI_ReleaseObj( hdc );
    }
    DeleteDC( hdc );
    return ret;
}

/***********************************************************************
 *           ScaleWindowExtEx    ([email protected])
 */
BOOL WINAPI ScaleWindowExtEx( HDC hdc, INT xNum, INT xDenom,
                                  INT yNum, INT yDenom, LPSIZE size )
{
    BOOL ret = TRUE;
    DC * dc = DC_GetDCPtr( hdc );
    if (!dc) return FALSE;
    if (dc->funcs->pScaleWindowExt)
    {
        ret = dc->funcs->pScaleWindowExt( dc, xNum, xDenom, yNum, yDenom );
        goto done;
    }
    if (size)
    {
	size->cx = dc->wndExtX;
	size->cy = dc->wndExtY;
    }
    if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
	goto done;
    if (!xNum || !xDenom || !xNum || !yDenom)
    {
        ret = FALSE;
        goto done;
    }
    dc->wndExtX = (dc->wndExtX * xNum) / xDenom;
    dc->wndExtY = (dc->wndExtY * yNum) / yDenom;
    if (dc->wndExtX == 0) dc->wndExtX = 1;
    if (dc->wndExtY == 0) dc->wndExtY = 1;
    if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
    DC_UpdateXforms( dc );
 done:
    GDI_ReleaseObj( hdc );
    return ret;
}

/***********************************************************************
 *           SetWindowExtEx    ([email protected])
 */
BOOL WINAPI SetWindowExtEx( HDC hdc, INT x, INT y, LPSIZE size )
{
    BOOL ret = TRUE;
    DC * dc = DC_GetDCPtr( hdc );
    if (!dc) return FALSE;
    if (dc->funcs->pSetWindowExt)
    {
        ret = dc->funcs->pSetWindowExt( dc, x, y );
        goto done;
    }
    if (size)
    {
	size->cx = dc->wndExtX;
	size->cy = dc->wndExtY;
    }
    if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
	goto done;
    if (!x || !y)
    {
        ret = FALSE;
        goto done;
    }
    dc->wndExtX = x;
    dc->wndExtY = y;
    if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
    DC_UpdateXforms( dc );
 done:
    GDI_ReleaseObj( hdc );
    return ret;
}