1 /*

     2 * Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 

    19 #ifndef CALCTRANSFORM_H

    20 #define CALCTRANSFORM_H

    21 

    22 #include <gdi.h>

    23 #include <lcdgdrv.h>

    24 #include "lcdgdrvif.h"

    25 #include "lcdtransform.h"

    26 

    27 

    28 /**

    29  * Compute the TLcdTransform mapping between aSrcRect and aDstRect with transform type

    30  * aSrcTransform.

    31  */

    32 IMPORT_C TLcdTransform CalcTransform

    33 (

    34     const TRect&   aDstRect,            // unclipped

    35     const TRect&   aSrcRect,            // unclipped

    36     TTransformType aSrcTransform

    37 );

    38 

    39 /**

    40  * Calculate clipped source and destination rectangles for

    41  * src to dst transform aSrcTransform. This function calculates

    42  * the largest corresponding subrectangles of aDstRect and aSrcRect

    43  * that also lie within aDstClipRect and aSrcClipRect respectively.

    44  */

    45 IMPORT_C void ClipTransformRect

    46 (

    47     TRect& aDstRect,                    // in/out

    48     TRect& aSrcRect,                    // in/out

    49     const TRect& aDstClipRect,          // input

    50     const TRect& aSrcClipRect,          // input

    51     TLcdTransform& aSrcTransform        // src to target transform

    52 );

    53 

    54 /**

    55  * Clip source and dst rects against source and dst clip rects, maintaining mapping (i.e. no stretch)

    56  */

    57 IMPORT_C void ClipRects(TRect& aDstRect, const TRect& aDstClip, TRect& aSrcRect, const TRect& aSrcClip);

    58 

    59 /**

    60  *@return ETrue if aSrcRect and aDstRect correspond under transformation aTransform

    61  */

    62 IMPORT_C TBool CheckTransform(const TRect& aDstRect, const TRect& aSrcRect, const TLcdTransform aTransform);

    63 

    64 /**

    65  *@return ETrue if aDstRect is completely contained within rectangle of size aDstSize, and

    66  * aDstRect transformed by aTransform is completely contained within rectangle of size aSrcSize.

    67  */

    68 IMPORT_C TBool CheckBounds(const TSize& aDstSize, const TSize& aSrcSize, const TRect& aDstRect, const TLcdTransform& aTransform);

    69 

    70 #endif // CALCTRANSFORM_H