sl@0: /*
sl@0:  *
sl@0:  * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include "LETypes.h"
sl@0: #include "LEFontInstance.h"
sl@0: #include "OpenTypeTables.h"
sl@0: #include "ValueRecords.h"
sl@0: #include "DeviceTables.h"
sl@0: #include "GlyphIterator.h"
sl@0: #include "LESwaps.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: #define Nibble(value, nibble) ((value >> (nibble * 4)) & 0xF)
sl@0: #define NibbleBits(value, nibble) (bitsInNibble[Nibble(value, nibble)])
sl@0: 
sl@0: le_int16 ValueRecord::getFieldValue(ValueFormat valueFormat, ValueRecordField field) const
sl@0: {
sl@0:     le_int16 valueIndex = getFieldIndex(valueFormat, field);
sl@0:     le_int16 value = values[valueIndex];
sl@0: 
sl@0:     return SWAPW(value);
sl@0: }
sl@0: 
sl@0: le_int16 ValueRecord::getFieldValue(le_int16 index, ValueFormat valueFormat, ValueRecordField field) const
sl@0: {
sl@0:     le_int16 baseIndex = getFieldCount(valueFormat) * index;
sl@0:     le_int16 valueIndex = getFieldIndex(valueFormat, field);
sl@0:     le_int16 value = values[baseIndex + valueIndex];
sl@0: 
sl@0:     return SWAPW(value);
sl@0: }
sl@0: 
sl@0: void ValueRecord::adjustPosition(ValueFormat valueFormat, const char *base, GlyphIterator &glyphIterator,
sl@0:                                  const LEFontInstance *fontInstance) const
sl@0: {
sl@0:     float xPlacementAdjustment = 0;
sl@0:     float yPlacementAdjustment = 0;
sl@0:     float xAdvanceAdjustment   = 0;
sl@0:     float yAdvanceAdjustment   = 0;
sl@0: 
sl@0:     if ((valueFormat & vfbXPlacement) != 0) {
sl@0:         le_int16 value = getFieldValue(valueFormat, vrfXPlacement);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(value, 0, pixels);
sl@0: 
sl@0:         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     if ((valueFormat & vfbYPlacement) != 0) {
sl@0:         le_int16 value = getFieldValue(valueFormat, vrfYPlacement);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(0, value, pixels);
sl@0: 
sl@0:         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     if ((valueFormat & vfbXAdvance) != 0) {
sl@0:         le_int16 value = getFieldValue(valueFormat, vrfXAdvance);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(value, 0, pixels);
sl@0: 
sl@0:         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     if ((valueFormat & vfbYAdvance) != 0) {
sl@0:         le_int16 value = getFieldValue(valueFormat, vrfYAdvance);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(0, value, pixels);
sl@0: 
sl@0:         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     // FIXME: The device adjustments should really be transformed, but
sl@0:     // the only way I know how to do that is to convert them to le_int16 units,
sl@0:     // transform them, and then convert them back to pixels. Sigh...
sl@0:     if ((valueFormat & vfbAnyDevice) != 0) {
sl@0:         le_int16 xppem = (le_int16) fontInstance->getXPixelsPerEm();
sl@0:         le_int16 yppem = (le_int16) fontInstance->getYPixelsPerEm();
sl@0: 
sl@0:         if ((valueFormat & vfbXPlaDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(valueFormat, vrfXPlaDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 xAdj = dt->getAdjustment(xppem);
sl@0: 
sl@0:                 xPlacementAdjustment += fontInstance->xPixelsToUnits(xAdj);
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         if ((valueFormat & vfbYPlaDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(valueFormat, vrfYPlaDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 yAdj = dt->getAdjustment(yppem);
sl@0: 
sl@0:                 yPlacementAdjustment += fontInstance->yPixelsToUnits(yAdj);
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         if ((valueFormat & vfbXAdvDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(valueFormat, vrfXAdvDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 xAdj = dt->getAdjustment(xppem);
sl@0: 
sl@0:                 xAdvanceAdjustment += fontInstance->xPixelsToUnits(xAdj);
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         if ((valueFormat & vfbYAdvDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(valueFormat, vrfYAdvDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 yAdj = dt->getAdjustment(yppem);
sl@0: 
sl@0:                 yAdvanceAdjustment += fontInstance->yPixelsToUnits(yAdj);
sl@0:             }
sl@0:         }
sl@0:     }
sl@0: 
sl@0:     glyphIterator.adjustCurrGlyphPositionAdjustment(
sl@0:         xPlacementAdjustment, yPlacementAdjustment, xAdvanceAdjustment, yAdvanceAdjustment);
sl@0: }
sl@0: 
sl@0: void ValueRecord::adjustPosition(le_int16 index, ValueFormat valueFormat, const char *base, GlyphIterator &glyphIterator,
sl@0:                                  const LEFontInstance *fontInstance) const
sl@0: {
sl@0:     float xPlacementAdjustment = 0;
sl@0:     float yPlacementAdjustment = 0;
sl@0:     float xAdvanceAdjustment   = 0;
sl@0:     float yAdvanceAdjustment   = 0;
sl@0: 
sl@0:     if ((valueFormat & vfbXPlacement) != 0) {
sl@0:         le_int16 value = getFieldValue(index, valueFormat, vrfXPlacement);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(value, 0, pixels);
sl@0: 
sl@0:         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     if ((valueFormat & vfbYPlacement) != 0) {
sl@0:         le_int16 value = getFieldValue(index, valueFormat, vrfYPlacement);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(0, value, pixels);
sl@0: 
sl@0:         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     if ((valueFormat & vfbXAdvance) != 0) {
sl@0:         le_int16 value = getFieldValue(index, valueFormat, vrfXAdvance);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(value, 0, pixels);
sl@0: 
sl@0:         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     if ((valueFormat & vfbYAdvance) != 0) {
sl@0:         le_int16 value = getFieldValue(index, valueFormat, vrfYAdvance);
sl@0:         LEPoint pixels;
sl@0: 
sl@0:         fontInstance->transformFunits(0, value, pixels);
sl@0: 
sl@0:         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);
sl@0:         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);
sl@0:     }
sl@0: 
sl@0:     // FIXME: The device adjustments should really be transformed, but
sl@0:     // the only way I know how to do that is to convert them to le_int16 units,
sl@0:     // transform them, and then convert them back to pixels. Sigh...
sl@0:     if ((valueFormat & vfbAnyDevice) != 0) {
sl@0:         le_int16 xppem = (le_int16) fontInstance->getXPixelsPerEm();
sl@0:         le_int16 yppem = (le_int16) fontInstance->getYPixelsPerEm();
sl@0: 
sl@0:         if ((valueFormat & vfbXPlaDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(index, valueFormat, vrfXPlaDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 xAdj = dt->getAdjustment(xppem);
sl@0: 
sl@0:                 xPlacementAdjustment += fontInstance->xPixelsToUnits(xAdj);
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         if ((valueFormat & vfbYPlaDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(index, valueFormat, vrfYPlaDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 yAdj = dt->getAdjustment(yppem);
sl@0: 
sl@0:                 yPlacementAdjustment += fontInstance->yPixelsToUnits(yAdj);
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         if ((valueFormat & vfbXAdvDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(index, valueFormat, vrfXAdvDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 xAdj = dt->getAdjustment(xppem);
sl@0: 
sl@0:                 xAdvanceAdjustment += fontInstance->xPixelsToUnits(xAdj);
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         if ((valueFormat & vfbYAdvDevice) != 0) {
sl@0:             Offset dtOffset = getFieldValue(index, valueFormat, vrfYAdvDevice);
sl@0: 
sl@0:             if (dtOffset != 0) {
sl@0:                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);
sl@0:                 le_int16 yAdj = dt->getAdjustment(yppem);
sl@0: 
sl@0:                 yAdvanceAdjustment += fontInstance->yPixelsToUnits(yAdj);
sl@0:             }
sl@0:         }
sl@0:     }
sl@0: 
sl@0:     glyphIterator.adjustCurrGlyphPositionAdjustment(
sl@0:         xPlacementAdjustment, yPlacementAdjustment, xAdvanceAdjustment, yAdvanceAdjustment);
sl@0: }
sl@0: 
sl@0: le_int16 ValueRecord::getSize(ValueFormat valueFormat)
sl@0: {
sl@0:     return getFieldCount(valueFormat) * sizeof(le_int16);
sl@0: }
sl@0: 
sl@0: le_int16 ValueRecord::getFieldCount(ValueFormat valueFormat)
sl@0: {
sl@0:     static const le_int16 bitsInNibble[] =
sl@0:     {
sl@0:         0 + 0 + 0 + 0,
sl@0:         0 + 0 + 0 + 1,
sl@0:         0 + 0 + 1 + 0,
sl@0:         0 + 0 + 1 + 1,
sl@0:         0 + 1 + 0 + 0,
sl@0:         0 + 1 + 0 + 1,
sl@0:         0 + 1 + 1 + 0,
sl@0:         0 + 1 + 1 + 1,
sl@0:         1 + 0 + 0 + 0,
sl@0:         1 + 0 + 0 + 1,
sl@0:         1 + 0 + 1 + 0,
sl@0:         1 + 0 + 1 + 1,
sl@0:         1 + 1 + 0 + 0,
sl@0:         1 + 1 + 0 + 1,
sl@0:         1 + 1 + 1 + 0,
sl@0:         1 + 1 + 1 + 1
sl@0:     };
sl@0: 
sl@0:     valueFormat &= ~vfbReserved;
sl@0: 
sl@0:     return NibbleBits(valueFormat, 0) + NibbleBits(valueFormat, 1) +
sl@0:            NibbleBits(valueFormat, 2) + NibbleBits(valueFormat, 3);
sl@0: }
sl@0: 
sl@0: le_int16 ValueRecord::getFieldIndex(ValueFormat valueFormat, ValueRecordField field)
sl@0: {
sl@0:     static const le_uint16 beforeMasks[] = 
sl@0:     {
sl@0:         0x0000,
sl@0:         0x0001,
sl@0:         0x0003,
sl@0:         0x0007,
sl@0:         0x000F,
sl@0:         0x001F,
sl@0:         0x003F,
sl@0:         0x007F,
sl@0:         0x00FF,
sl@0:         0x01FF,
sl@0:         0x03FF,
sl@0:         0x07FF,
sl@0:         0x0FFF,
sl@0:         0x1FFF,
sl@0:         0x3FFF,
sl@0:         0x7FFF,
sl@0:         0xFFFF
sl@0:     };
sl@0: 
sl@0:     return getFieldCount(valueFormat & beforeMasks[field]);
sl@0: }
sl@0: 
sl@0: U_NAMESPACE_END