diff -r 000000000000 -r 1fb32624e06b fontservices/textshaperplugin/IcuSource/layout/LEGlyphStorage.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/fontservices/textshaperplugin/IcuSource/layout/LEGlyphStorage.h Tue Feb 02 02:02:46 2010 +0200 @@ -0,0 +1,518 @@ +/* + ********************************************************************** + * Copyright (C) 1998-2005, International Business Machines + * Corporation and others. All Rights Reserved. + ********************************************************************** + */ + +#ifndef __LEGLYPHSTORAGE_H +#define __LEGLYPHSTORAGE_H + +#include "LETypes.h" +#include "LEInsertionList.h" + +/** + * \file + * \brief C++ API: This class encapsulates the per-glyph storage used by the ICU LayoutEngine. + */ + +U_NAMESPACE_BEGIN + +/** + * This class encapsulates the per-glyph storage used by the ICU LayoutEngine. + * For each glyph it holds the glyph ID, the index of the backing store character + * which produced the glyph, the X and Y position of the glyph and an auxillary data + * pointer. + * + * The storage is growable using the LEInsertionList class. + * + * + * @see LEInsertionList.h + * + * @draft ICU 3.0 + */ +class U_LAYOUT_API LEGlyphStorage : public UObject, protected LEInsertionCallback +{ +private: + /** + * The number of entries in the per-glyph arrays. + * + * @internal + */ + le_int32 fGlyphCount; + + /** + * The glyph ID array. + * + * @internal + */ + LEGlyphID *fGlyphs; + + /** + * The char indices array. + * + * @internal + */ + le_int32 *fCharIndices; + + /** + * The glyph positions array. + * + * @internal + */ + float *fPositions; + + /** + * The auxillary data array. + * + * @internal + */ + void **fAuxData; + + + /** + * The insertion list, used to grow the above arrays. + * + * @internal + */ + LEInsertionList *fInsertionList; + + /** + * The source index while growing the data arrays. + * + * @internal + */ + le_int32 fSrcIndex; + + /** + * The destination index used while growing the data arrays. + * + * @internal + */ + le_int32 fDestIndex; + +protected: + /** + * This implements LEInsertionCallback. The LEInsertionList + * will call this method once for each insertion. + * + * @param atPosition the position of the insertion + * @param count the number of glyphs being inserted + * @param newGlyphs the address of the new glyph IDs + * + * @return true if LEInsertionList should stop + * processing the insertion list after this insertion. + * + * @see LEInsertionList.h + * + * @draft ICU 3.0 + */ + virtual le_bool applyInsertion(le_int32 atPosition, le_int32 count, LEGlyphID newGlyphs[]); + +public: + + /** + * Allocates an empty LEGlyphStorage object. You must call + * allocateGlyphArray, allocatePositions and allocateAuxData + * to allocate the data. + */ + LEGlyphStorage(); + + /** + * The destructor. This will deallocate all of the arrays. + */ + ~LEGlyphStorage(); + + /** + * This method returns the number of glyphs in the glyph array. + * + * @return the number of glyphs in the glyph array + * + * @draft ICU 3.0 + */ + inline le_int32 getGlyphCount() const; + + /** + * This method copies the glyph array into a caller supplied array. + * The caller must ensure that the array is large enough to hold all + * the glyphs. + * + * @param glyphs - the destiniation glyph array + * @param success - set to an error code if the operation fails + * + * @draft ICU 3.0 + */ + void getGlyphs(LEGlyphID glyphs[], LEErrorCode &success) const; + + /** + * This method copies the glyph array into a caller supplied array, + * ORing in extra bits. (This functionality is needed by the JDK, + * which uses 32 bits pre glyph idex, with the high 16 bits encoding + * the composite font slot number) + * + * @param glyphs - the destination (32 bit) glyph array + * @param extraBits - this value will be ORed with each glyph index + * @param success - set to an error code if the operation fails + * + * @draft ICU 3.0 + */ + void getGlyphs(le_uint32 glyphs[], le_uint32 extraBits, LEErrorCode &success) const; + + /** + * This method copies the character index array into a caller supplied array. + * The caller must ensure that the array is large enough to hold a + * character index for each glyph. + * + * @param charIndices - the destiniation character index array + * @param success - set to an error code if the operation fails + * + * @draft ICU 3.0 + */ + void getCharIndices(le_int32 charIndices[], LEErrorCode &success) const; + + /** + * This method copies the character index array into a caller supplied array. + * The caller must ensure that the array is large enough to hold a + * character index for each glyph. + * + * @param charIndices - the destiniation character index array + * @param indexBase - an offset which will be added to each index + * @param success - set to an error code if the operation fails + * + * @draft ICU 3.0 + */ + void getCharIndices(le_int32 charIndices[], le_int32 indexBase, LEErrorCode &success) const; + + /** + * This method copies the position array into a caller supplied array. + * The caller must ensure that the array is large enough to hold an + * X and Y position for each glyph, plus an extra X and Y for the + * advance of the last glyph. + * + * @param positions - the destiniation position array + * @param success - set to an error code if the operation fails + * + * @draft ICU 3.0 + */ + void getGlyphPositions(float positions[], LEErrorCode &success) const; + + /** + * This method returns the X and Y position of the glyph at + * the given index. + * + * Input parameters: + * @param glyphIndex - the index of the glyph + * + * Output parameters: + * @param x - the glyph's X position + * @param y - the glyph's Y position + * @param success - set to an error code if the operation fails + * + * @draft ICU 3.0 + */ + void getGlyphPosition(le_int32 glyphIndex, float &x, float &y, LEErrorCode &success) const; + + /** + * This method allocates the glyph array, the char indices array and the insertion list. You + * must call this method before using the object. This method also initializes the char indices + * array. + * + * @param initialGlyphCount the initial size of the glyph and char indices arrays. + * @param rightToLeft true if the original input text is right to left. + * @param success set to an error code if the storage cannot be allocated of if the initial + * glyph count is not positive. + * + * @draft ICU 3.0 + */ + void allocateGlyphArray(le_int32 initialGlyphCount, le_bool rightToLeft, LEErrorCode &success); + + /** + * This method allocates the storage for the glyph positions. It allocates one extra X, Y + * position pair for the position just after the last glyph. + * + * @param success set to an error code if the positions array cannot be allocated. + * + * @return the number of X, Y position pairs allocated. + * + * @draft ICU 3.0 + */ + le_int32 allocatePositions(LEErrorCode &success); + + /** + * This method allocates the storage for the auxillary glyph data. + * + * @param success set to an error code if the aulillary data array cannot be allocated. + * + * @return the size of the auxillary data array. + * + * @draft ICU 3.0 + */ + le_int32 allocateAuxData(LEErrorCode &success); + + /** + * Copy the entire auxillary data array. + * + * @param auxData the auxillary data array will be copied to this address + * @param success set to an error code if the data cannot be copied + * + * @draft ICU 3.0 + */ + void getAuxData(void *auxData[], LEErrorCode &success) const; + + /** + * Get the glyph ID for a particular glyph. + * + * @param glyphIndex the index into the glyph array + * @param success set to an error code if the glyph ID cannot be retrieved. + * + * @return the glyph ID + * + * @draft ICU 3.0 + */ + LEGlyphID getGlyphID(le_int32 glyphIndex, LEErrorCode &success) const; + + /** + * Get the char index for a particular glyph. + * + * @param glyphIndex the index into the glyph array + * @param success set to an error code if the char index cannot be retrieved. + * + * @return the character index + * + * @draft ICU 3.0 + */ + le_int32 getCharIndex(le_int32 glyphIndex, LEErrorCode &success) const; + + + /** + * Get the auxillary data for a particular glyph. + * + * @param glyphIndex the index into the glyph array + * @param success set to an error code if the auxillary data cannot be retrieved. + * + * @return the auxillary data + * + * @draft ICU 3.0 + */ + void *getAuxData(le_int32 glyphIndex, LEErrorCode &success) const; + + /** + * This operator allows direct access to the glyph array + * using the index operator. + * + * @param glyphIndex the index into the glyph array + * + * @return a reference to the given location in the glyph array + * + * @draft ICU 3.0 + */ + inline LEGlyphID &operator[](le_int32 glyphIndex) const; + + /** + * Call this method to replace a single glyph in the glyph array + * with multiple glyphs. This method uses the LEInsertionList + * to do the insertion. It returns the address of storage where the new + * glyph IDs can be stored. They will not actually be inserted into the + * glyph array until applyInsertions is called. + * + * @param atIndex the index of the glyph to be replaced + * @param insertCount the number of glyphs to replace it with + * @param success set to an error code if the auxillary data cannot be retrieved. + * + * @return the address at which to store the replacement glyphs. + * + * @see LEInsetionList.h + * + * @draft ICU 3.0 + */ + LEGlyphID *insertGlyphs(le_int32 atIndex, le_int32 insertCount, + LEErrorCode& success); + + /** + * This method causes all of the glyph insertions recorded by + * insertGlyphs to be applied to the glyph array. The + * new slots in the char indices and the auxillary data arrays + * will be filled in with the values for the glyph being replaced. + * + * @return the new size of the glyph array + * + * @see LEInsertionList.h + * + * @draft ICU 3.0 + */ + le_int32 applyInsertions(); + + /** + * Set the glyph ID for a particular glyph. + * + * @param glyphIndex the index of the glyph + * @param glyphID the new glyph ID + * @param success will be set to an error code if the glyph ID cannot be set. + * + * @draft ICU 3.0 + */ + void setGlyphID(le_int32 glyphIndex, LEGlyphID glyphID, LEErrorCode &success); + + /** + * Set the char index for a particular glyph. + * + * @param glyphIndex the index of the glyph + * @param charIndex the new char index + * @param success will be set to an error code if the char index cannot be set. + * + * @draft ICU 3.0 + */ + void setCharIndex(le_int32 glyphIndex, le_int32 charIndex, LEErrorCode &success); + + /** + * Set the X, Y position for a particular glyph. + * + * @param glyphIndex the index of the glyph + * @param x the new X position + * @param y the new Y position + * @param success will be set to an error code if the position cannot be set. + * + * @draft ICU 3.0 + */ + void setPosition(le_int32 glyphIndex, float x, float y, LEErrorCode &success); + + /** + * Adjust the X, Y position for a particular glyph. + * + * @param glyphIndex the index of the glyph + * @param xAdjust the adjustment to the glyph's X position + * @param yAdjust the adjustment to the glyph's Y position + * @param success will be set to an error code if the glyph's position cannot be adjusted. + * + * @draft ICU 3.0 + */ + void adjustPosition(le_int32 glyphIndex, float xAdjust, float yAdjust, LEErrorCode &success); + + /** + * Set the auxillary data for a particular glyph. + * + * @param glyphIndex the index of the glyph + * @param auxData the new auxillary data + * @param success will be set to an error code if the auxillary data cannot be set. + * + * @draft ICU 3.0 + */ + void setAuxData(le_int32 glyphIndex, void *auxData, LEErrorCode &success); + + /** + * Delete the glyph array and replace it with the one + * in from. Set the glyph array pointer + * in from to NULL. + * + * @param from the LEGlyphStorage object from which + * to get the new glyph array. + * + * @draft ICU 3.0 + */ + void adoptGlyphArray(LEGlyphStorage &from); + + /** + * Delete the char indices array and replace it with the one + * in from. Set the char indices array pointer + * in from to NULL. + * + * @param from the LEGlyphStorage object from which + * to get the new char indices array. + * + * @draft ICU 3.0 + */ + void adoptCharIndicesArray(LEGlyphStorage &from); + + /** + * Delete the position array and replace it with the one + * in from. Set the position array pointer + * in from to NULL. + * + * @param from the LEGlyphStorage object from which + * to get the new position array. + * + * @draft ICU 3.0 + */ + void adoptPositionArray(LEGlyphStorage &from); + + /** + * Delete the auxillary data array and replace it with the one + * in from. Set the auxillary data array pointer + * in from to NULL. + * + * @param from the LEGlyphStorage object from which + * to get the new auxillary data array. + * + * @draft ICU 3.0 + */ + void adoptAuxDataArray(LEGlyphStorage &from); + + /** + * Change the glyph count of this object to be the same + * as the one in from. + * + * @param from the LEGlyphStorage object from which + * to get the new glyph count. + * + * @draft ICU 3.0 + */ + void adoptGlyphCount(LEGlyphStorage &from); + + /** + * Change the glyph count of this object to the given value. + * + * @param newGlyphCount the new glyph count. + * + * @draft ICU 3.0 + */ + void adoptGlyphCount(le_int32 newGlyphCount); + + /** + * This method frees the glyph, character index, position and + * auxillary data arrays so that the LayoutEngine can be reused + * to layout a different characer array. (This method is also called + * by the destructor) + * + * @draft ICU 3.0 + */ + void reset(); + + /** + * This method move glyph of Malayalam RAKAR to the left of the preceding + * consonant cluster. + * + * @param aGlyphID the LEGlyphID of RAKAR + * + * @draft Added by Nokia + */ + void forMlylRakar(LEGlyphID aGlyphID); + + /** + * ICU "poor man's RTTI", returns a UClassID for the actual class. + * + * @draft ICU 3.0 + */ + virtual UClassID getDynamicClassID() const; + + /** + * ICU "poor man's RTTI", returns a UClassID for this class. + * + * @draft ICU 3.0 + */ + static UClassID getStaticClassID(); +}; + +inline le_int32 LEGlyphStorage::getGlyphCount() const +{ + return fGlyphCount; +} + +inline LEGlyphID &LEGlyphStorage::operator[](le_int32 glyphIndex) const +{ + return fGlyphs[glyphIndex]; +} + + +U_NAMESPACE_END +#endif +