109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
// Copyright (C) 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*
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* (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "LEFontInstance.h"
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#include "DeviceTables.h"
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#include "AnchorTables.h"
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#include "LESwaps.h"
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U_NAMESPACE_BEGIN
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void AnchorTable::getAnchor(LEGlyphID glyphID, const LEFontInstance *fontInstance,
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LEPoint &anchor) const
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{
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switch(SWAPW(anchorFormat)) {
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case 1:
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{
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const Format1AnchorTable *f1 = (const Format1AnchorTable *) this;
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f1->getAnchor(fontInstance, anchor);
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break;
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}
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case 2:
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{
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const Format2AnchorTable *f2 = (const Format2AnchorTable *) this;
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f2->getAnchor(glyphID, fontInstance, anchor);
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break;
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}
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case 3:
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{
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const Format3AnchorTable *f3 = (const Format3AnchorTable *) this;
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f3->getAnchor(fontInstance, anchor);
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break;
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}
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default:
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// unknown format: just use x, y coordinate, like format 1...
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const Format1AnchorTable *f1 = (const Format1AnchorTable *) this;
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f1->getAnchor(fontInstance, anchor);
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break;
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}
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}
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void Format1AnchorTable::getAnchor(const LEFontInstance *fontInstance, LEPoint &anchor) const
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{
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le_int16 x = SWAPW(xCoordinate);
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le_int16 y = SWAPW(yCoordinate);
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LEPoint pixels;
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fontInstance->transformFunits(x, y, pixels);
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fontInstance->pixelsToUnits(pixels, anchor);
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}
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void Format2AnchorTable::getAnchor(LEGlyphID glyphID, const LEFontInstance *fontInstance, LEPoint &anchor) const
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{
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LEPoint point;
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if (! fontInstance->getGlyphPoint(glyphID, SWAPW(anchorPoint), point)) {
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le_int16 x = SWAPW(xCoordinate);
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le_int16 y = SWAPW(yCoordinate);
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fontInstance->transformFunits(x, y, point);
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}
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fontInstance->pixelsToUnits(point, anchor);
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}
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void Format3AnchorTable::getAnchor(const LEFontInstance *fontInstance, LEPoint &anchor) const
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{
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le_int16 x = SWAPW(xCoordinate);
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le_int16 y = SWAPW(yCoordinate);
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LEPoint pixels;
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Offset dtxOffset = SWAPW(xDeviceTableOffset);
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Offset dtyOffset = SWAPW(yDeviceTableOffset);
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fontInstance->transformFunits(x, y, pixels);
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if (dtxOffset != 0) {
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const DeviceTable *dtx = (const DeviceTable *) ((char *) this + dtxOffset);
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le_int16 adjx = dtx->getAdjustment((le_int16) fontInstance->getXPixelsPerEm());
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pixels.fX += adjx;
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}
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if (dtyOffset != 0) {
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const DeviceTable *dty = (const DeviceTable *) ((char *) this + dtyOffset);
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le_int16 adjy = dty->getAdjustment((le_int16) fontInstance->getYPixelsPerEm());
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pixels.fY += adjy;
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}
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fontInstance->pixelsToUnits(pixels, anchor);
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}
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U_NAMESPACE_END
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