/*

 *

 * (C) Copyright IBM Corp. 1998-2004 - 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, set the anchor point to (0, 0)

        anchor.fX = 0;

        anchor.fY = 0;

        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