1 /*
2 *
3 * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
4 *
5 */
6
7 #include "LETypes.h"
8 #include "LEFontInstance.h"
9 #include "DeviceTables.h"
10 #include "AnchorTables.h"
11 #include "LESwaps.h"
12
13 U_NAMESPACE_BEGIN
14
getAnchor(LEGlyphID glyphID,const LEFontInstance * fontInstance,LEPoint & anchor) const15 void AnchorTable::getAnchor(LEGlyphID glyphID, const LEFontInstance *fontInstance,
16 LEPoint &anchor) const
17 {
18 switch(SWAPW(anchorFormat)) {
19 case 1:
20 {
21 const Format1AnchorTable *f1 = (const Format1AnchorTable *) this;
22
23 f1->getAnchor(fontInstance, anchor);
24 break;
25 }
26
27 case 2:
28 {
29 const Format2AnchorTable *f2 = (const Format2AnchorTable *) this;
30
31 f2->getAnchor(glyphID, fontInstance, anchor);
32 break;
33 }
34
35 case 3:
36 {
37 const Format3AnchorTable *f3 = (const Format3AnchorTable *) this;
38
39 f3->getAnchor(fontInstance, anchor);
40 break;
41 }
42
43 default:
44 // unknown format: just use x, y coordinate, like format 1...
45 const Format1AnchorTable *f1 = (const Format1AnchorTable *) this;
46
47 f1->getAnchor(fontInstance, anchor);
48 break;
49 }
50 }
51
getAnchor(const LEFontInstance * fontInstance,LEPoint & anchor) const52 void Format1AnchorTable::getAnchor(const LEFontInstance *fontInstance, LEPoint &anchor) const
53 {
54 le_int16 x = SWAPW(xCoordinate);
55 le_int16 y = SWAPW(yCoordinate);
56 LEPoint pixels;
57
58 fontInstance->transformFunits(x, y, pixels);
59
60 fontInstance->pixelsToUnits(pixels, anchor);
61 }
62
getAnchor(LEGlyphID glyphID,const LEFontInstance * fontInstance,LEPoint & anchor) const63 void Format2AnchorTable::getAnchor(LEGlyphID glyphID, const LEFontInstance *fontInstance, LEPoint &anchor) const
64 {
65 LEPoint point;
66
67 if (! fontInstance->getGlyphPoint(glyphID, SWAPW(anchorPoint), point)) {
68 le_int16 x = SWAPW(xCoordinate);
69 le_int16 y = SWAPW(yCoordinate);
70
71 fontInstance->transformFunits(x, y, point);
72 }
73
74
75 fontInstance->pixelsToUnits(point, anchor);
76 }
77
getAnchor(const LEFontInstance * fontInstance,LEPoint & anchor) const78 void Format3AnchorTable::getAnchor(const LEFontInstance *fontInstance, LEPoint &anchor) const
79 {
80 le_int16 x = SWAPW(xCoordinate);
81 le_int16 y = SWAPW(yCoordinate);
82 LEPoint pixels;
83 Offset dtxOffset = SWAPW(xDeviceTableOffset);
84 Offset dtyOffset = SWAPW(yDeviceTableOffset);
85
86 fontInstance->transformFunits(x, y, pixels);
87
88 if (dtxOffset != 0) {
89 const DeviceTable *dtx = (const DeviceTable *) ((char *) this + dtxOffset);
90 le_int16 adjx = dtx->getAdjustment((le_int16) fontInstance->getXPixelsPerEm());
91
92 pixels.fX += adjx;
93 }
94
95 if (dtyOffset != 0) {
96 const DeviceTable *dty = (const DeviceTable *) ((char *) this + dtyOffset);
97 le_int16 adjy = dty->getAdjustment((le_int16) fontInstance->getYPixelsPerEm());
98
99 pixels.fY += adjy;
100 }
101
102 fontInstance->pixelsToUnits(pixels, anchor);
103 }
104
105 U_NAMESPACE_END
106
107