/* * @(#)ValueRecords.cpp 1.6 00/03/15 * * (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved * */ #include "LETypes.h" #include "LEFontInstance.h" #include "OpenTypeTables.h" #include "ValueRecords.h" #include "DeviceTables.h" #include "GlyphIterator.h" #include "GlyphPositionAdjustments.h" #include "LESwaps.h" U_NAMESPACE_BEGIN #define Nibble(value, nibble) ((value >> (nibble * 4)) & 0xF) #define NibbleBits(value, nibble) (bitsInNibble[Nibble(value, nibble)]) le_int16 ValueRecord::getFieldValue(ValueFormat valueFormat, ValueRecordField field) const { le_int16 valueIndex = getFieldIndex(valueFormat, field); le_int16 value = values[valueIndex]; return SWAPW(value); } le_int16 ValueRecord::getFieldValue(le_int16 index, ValueFormat valueFormat, ValueRecordField field) const { le_int16 baseIndex = getFieldCount(valueFormat) * index; le_int16 valueIndex = getFieldIndex(valueFormat, field); le_int16 value = values[baseIndex + valueIndex]; return SWAPW(value); } void ValueRecord::adjustPosition(ValueFormat valueFormat, const char *base, GlyphPositionAdjustment &positionAdjustment, const LEFontInstance *fontInstance) const { if ((valueFormat & vfbXPlacement) != 0) { le_int16 value = getFieldValue(valueFormat, vrfXPlacement); LEPoint pixels; fontInstance->transformFunits(value, 0, pixels); positionAdjustment.adjustXPlacement(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYPlacement(fontInstance->yPixelsToUnits(pixels.fY)); } if ((valueFormat & vfbYPlacement) != 0) { le_int16 value = getFieldValue(valueFormat, vrfYPlacement); LEPoint pixels; fontInstance->transformFunits(0, value, pixels); positionAdjustment.adjustXPlacement(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYPlacement(fontInstance->yPixelsToUnits(pixels.fY)); } if ((valueFormat & vfbXAdvance) != 0) { le_int16 value = getFieldValue(valueFormat, vrfXAdvance); LEPoint pixels; fontInstance->transformFunits(value, 0, pixels); positionAdjustment.adjustXAdvance(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYAdvance(fontInstance->yPixelsToUnits(pixels.fY)); } if ((valueFormat & vfbYAdvance) != 0) { le_int16 value = getFieldValue(valueFormat, vrfYAdvance); LEPoint pixels; fontInstance->transformFunits(0, value, pixels); positionAdjustment.adjustXAdvance(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYAdvance(fontInstance->yPixelsToUnits(pixels.fY)); } // FIXME: The device adjustments should really be transformed, but // the only way I know how to do that is to convert them to le_int16 units, // transform them, and then convert them back to pixels. Sigh... if ((valueFormat & vfbAnyDevice) != 0) { le_int16 xppem = (le_int16) fontInstance->getXPixelsPerEm(); le_int16 yppem = (le_int16) fontInstance->getYPixelsPerEm(); if ((valueFormat & vfbXPlaDevice) != 0) { Offset dtOffset = getFieldValue(valueFormat, vrfXPlaDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 xAdj = dt->getAdjustment(xppem); positionAdjustment.adjustXPlacement(fontInstance->xPixelsToUnits(xAdj)); } } if ((valueFormat & vfbYPlaDevice) != 0) { Offset dtOffset = getFieldValue(valueFormat, vrfYPlaDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 yAdj = dt->getAdjustment(yppem); positionAdjustment.adjustYPlacement(fontInstance->yPixelsToUnits(yAdj)); } } if ((valueFormat & vfbXAdvDevice) != 0) { Offset dtOffset = getFieldValue(valueFormat, vrfXAdvDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 xAdj = dt->getAdjustment(xppem); positionAdjustment.adjustXAdvance(fontInstance->xPixelsToUnits(xAdj)); } } if ((valueFormat & vfbYAdvDevice) != 0) { Offset dtOffset = getFieldValue(valueFormat, vrfYAdvDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 yAdj = dt->getAdjustment(yppem); positionAdjustment.adjustYAdvance(fontInstance->yPixelsToUnits(yAdj)); } } } } void ValueRecord::adjustPosition(le_int16 index, ValueFormat valueFormat, const char *base, GlyphPositionAdjustment &positionAdjustment, const LEFontInstance *fontInstance) const { if ((valueFormat & vfbXPlacement) != 0) { le_int16 value = getFieldValue(index, valueFormat, vrfXPlacement); LEPoint pixels; fontInstance->transformFunits(value, 0, pixels); positionAdjustment.adjustXPlacement(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYPlacement(fontInstance->yPixelsToUnits(pixels.fY)); } if ((valueFormat & vfbYPlacement) != 0) { le_int16 value = getFieldValue(index, valueFormat, vrfYPlacement); LEPoint pixels; fontInstance->transformFunits(0, value, pixels); positionAdjustment.adjustXPlacement(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYPlacement(fontInstance->yPixelsToUnits(pixels.fY)); } if ((valueFormat & vfbXAdvance) != 0) { le_int16 value = getFieldValue(index, valueFormat, vrfXAdvance); LEPoint pixels; fontInstance->transformFunits(value, 0, pixels); positionAdjustment.adjustXAdvance(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYAdvance(fontInstance->yPixelsToUnits(pixels.fY)); } if ((valueFormat & vfbYAdvance) != 0) { le_int16 value = getFieldValue(index, valueFormat, vrfYAdvance); LEPoint pixels; fontInstance->transformFunits(0, value, pixels); positionAdjustment.adjustXAdvance(fontInstance->xPixelsToUnits(pixels.fX)); positionAdjustment.adjustYAdvance(fontInstance->yPixelsToUnits(pixels.fY)); } // FIXME: The device adjustments should really be transformed, but // the only way I know how to do that is to convert them to le_int16 units, // transform them, and then convert them back to pixels. Sigh... if ((valueFormat & vfbAnyDevice) != 0) { le_int16 xppem = (le_int16) fontInstance->getXPixelsPerEm(); le_int16 yppem = (le_int16) fontInstance->getYPixelsPerEm(); if ((valueFormat & vfbXPlaDevice) != 0) { Offset dtOffset = getFieldValue(index, valueFormat, vrfXPlaDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 xAdj = dt->getAdjustment(xppem); positionAdjustment.adjustXAdvance(fontInstance->xPixelsToUnits(xAdj)); } } if ((valueFormat & vfbYPlaDevice) != 0) { Offset dtOffset = getFieldValue(index, valueFormat, vrfYPlaDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 yAdj = dt->getAdjustment(yppem); positionAdjustment.adjustYAdvance(fontInstance->yPixelsToUnits(yAdj)); } } if ((valueFormat & vfbXAdvDevice) != 0) { Offset dtOffset = getFieldValue(index, valueFormat, vrfXAdvDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 xAdj = dt->getAdjustment(xppem); positionAdjustment.adjustXAdvance(fontInstance->xPixelsToUnits(xAdj)); } } if ((valueFormat & vfbYAdvDevice) != 0) { Offset dtOffset = getFieldValue(index, valueFormat, vrfYAdvDevice); if (dtOffset != 0) { const DeviceTable *dt = (const DeviceTable *) (base + dtOffset); le_int16 yAdj = dt->getAdjustment(yppem); positionAdjustment.adjustYAdvance(fontInstance->yPixelsToUnits(yAdj)); } } } } le_int16 ValueRecord::getSize(ValueFormat valueFormat) { return getFieldCount(valueFormat) * sizeof(le_int16); } le_int16 ValueRecord::getFieldCount(ValueFormat valueFormat) { static le_int16 bitsInNibble[] = { 0 + 0 + 0 + 0, 0 + 0 + 0 + 1, 0 + 0 + 1 + 0, 0 + 0 + 1 + 1, 0 + 1 + 0 + 0, 0 + 1 + 0 + 1, 0 + 1 + 1 + 0, 0 + 1 + 1 + 1, 1 + 0 + 0 + 0, 1 + 0 + 0 + 1, 1 + 0 + 1 + 0, 1 + 0 + 1 + 1, 1 + 1 + 0 + 0, 1 + 1 + 0 + 1, 1 + 1 + 1 + 0, 1 + 1 + 1 + 1 }; valueFormat &= ~vfbReserved; return NibbleBits(valueFormat, 0) + NibbleBits(valueFormat, 1) + NibbleBits(valueFormat, 2) + NibbleBits(valueFormat, 3); } le_int16 ValueRecord::getFieldIndex(ValueFormat valueFormat, ValueRecordField field) { static le_uint16 beforeMasks[] = { 0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F, 0x00FF, 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF }; return getFieldCount(valueFormat & beforeMasks[field]); } U_NAMESPACE_END