/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 *

 */

/*

 *

 * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved

 *

 */

#include "LETypes.h"

#include "LEFontInstance.h"

#include "DeviceTables.h"

#include "AnchorTables.h"

#include "LESwaps.h"

U_NAMESPACE_BEGIN

void AnchorTable::getAnchor(LEGlyphID glyphID, const LEFontInstance *fontInstance,

                            LEPoint &anchor) const

{

    switch(SWAPW(anchorFormat)) {

    case 1:

    {

        const Format1AnchorTable *f1 = (const Format1AnchorTable *) this;

        f1->getAnchor(fontInstance, anchor);

        break;

    }

    case 2:

    {

        const Format2AnchorTable *f2 = (const Format2AnchorTable *) this;

        f2->getAnchor(glyphID, fontInstance, anchor);

        break;

    }

    case 3:

    {

        const Format3AnchorTable *f3 = (const Format3AnchorTable *) this;

        f3->getAnchor(fontInstance, anchor);

        break;

    }

    default:

        // unknown format: just use x, y coordinate, like format 1...

        const Format1AnchorTable *f1 = (const Format1AnchorTable *) this;

        f1->getAnchor(fontInstance, anchor);

        break;

    }

}

void Format1AnchorTable::getAnchor(const LEFontInstance *fontInstance, LEPoint &anchor) const

{

    le_int16 x = SWAPW(xCoordinate);

    le_int16 y = SWAPW(yCoordinate);

    LEPoint pixels;

    fontInstance->transformFunits(x, y, pixels);

    fontInstance->pixelsToUnits(pixels, anchor);

}

void Format2AnchorTable::getAnchor(LEGlyphID glyphID, const LEFontInstance *fontInstance, LEPoint &anchor) const

{

    LEPoint point;

    if (! fontInstance->getGlyphPoint(glyphID, SWAPW(anchorPoint), point)) {

        le_int16 x = SWAPW(xCoordinate);

        le_int16 y = SWAPW(yCoordinate);

        fontInstance->transformFunits(x, y, point);

    }

    fontInstance->pixelsToUnits(point, anchor);

}

void Format3AnchorTable::getAnchor(const LEFontInstance *fontInstance, LEPoint &anchor) const

{

    le_int16 x = SWAPW(xCoordinate);

    le_int16 y = SWAPW(yCoordinate);

    LEPoint pixels;

    Offset dtxOffset = SWAPW(xDeviceTableOffset);

    Offset dtyOffset = SWAPW(yDeviceTableOffset);

    fontInstance->transformFunits(x, y, pixels);

    if (dtxOffset != 0) {

        const DeviceTable *dtx = (const DeviceTable *) ((char *) this + dtxOffset);

        le_int16 adjx = dtx->getAdjustment((le_int16) fontInstance->getXPixelsPerEm());

        pixels.fX += adjx;

    }

    if (dtyOffset != 0) {

        const DeviceTable *dty = (const DeviceTable *) ((char *) this + dtyOffset);

        le_int16 adjy = dty->getAdjustment((le_int16) fontInstance->getYPixelsPerEm());

        pixels.fY += adjy;

    }

    fontInstance->pixelsToUnits(pixels, anchor);

}

U_NAMESPACE_END