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/*
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**********************************************************************
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* Copyright (C) 1998-2005, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#ifndef __LEGLYPHSTORAGE_H
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#define __LEGLYPHSTORAGE_H
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#include "LETypes.h"
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#include "LEInsertionList.h"
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/**
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* \file
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* \brief C++ API: This class encapsulates the per-glyph storage used by the ICU LayoutEngine.
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*/
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U_NAMESPACE_BEGIN
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/**
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* This class encapsulates the per-glyph storage used by the ICU LayoutEngine.
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* For each glyph it holds the glyph ID, the index of the backing store character
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* which produced the glyph, the X and Y position of the glyph and an auxillary data
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* pointer.
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*
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* The storage is growable using the <code>LEInsertionList</code> class.
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*
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*
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* @see LEInsertionList.h
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*
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* @draft ICU 3.0
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*/
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class U_LAYOUT_API LEGlyphStorage : public UObject, protected LEInsertionCallback
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{
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private:
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/**
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* The number of entries in the per-glyph arrays.
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*
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* @internal
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*/
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le_int32 fGlyphCount;
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/**
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* The glyph ID array.
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*
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* @internal
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*/
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LEGlyphID *fGlyphs;
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/**
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* The char indices array.
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*
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* @internal
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*/
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le_int32 *fCharIndices;
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/**
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* The glyph positions array.
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*
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* @internal
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*/
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float *fPositions;
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/**
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* The auxillary data array.
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*
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* @internal
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*/
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void **fAuxData;
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/**
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* The insertion list, used to grow the above arrays.
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*
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* @internal
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*/
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LEInsertionList *fInsertionList;
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/**
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* The source index while growing the data arrays.
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*
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* @internal
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*/
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le_int32 fSrcIndex;
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/**
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* The destination index used while growing the data arrays.
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*
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* @internal
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*/
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le_int32 fDestIndex;
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protected:
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/**
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* This implements <code>LEInsertionCallback</code>. The <code>LEInsertionList</code>
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* will call this method once for each insertion.
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*
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* @param atPosition the position of the insertion
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* @param count the number of glyphs being inserted
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* @param newGlyphs the address of the new glyph IDs
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*
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* @return <code>true</code> if <code>LEInsertionList</code> should stop
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* processing the insertion list after this insertion.
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*
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* @see LEInsertionList.h
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*
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* @draft ICU 3.0
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*/
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virtual le_bool applyInsertion(le_int32 atPosition, le_int32 count, LEGlyphID newGlyphs[]);
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public:
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/**
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* Allocates an empty <code>LEGlyphStorage</code> object. You must call
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* <code>allocateGlyphArray, allocatePositions and allocateAuxData</code>
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* to allocate the data.
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*/
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LEGlyphStorage();
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/**
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* The destructor. This will deallocate all of the arrays.
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*/
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~LEGlyphStorage();
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/**
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* This method returns the number of glyphs in the glyph array.
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*
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* @return the number of glyphs in the glyph array
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*
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* @draft ICU 3.0
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*/
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inline le_int32 getGlyphCount() const;
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/**
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* This method copies the glyph array into a caller supplied array.
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* The caller must ensure that the array is large enough to hold all
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* the glyphs.
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*
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* @param glyphs - the destiniation glyph array
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* @param success - set to an error code if the operation fails
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*
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* @draft ICU 3.0
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*/
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void getGlyphs(LEGlyphID glyphs[], LEErrorCode &success) const;
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/**
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* This method copies the glyph array into a caller supplied array,
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* ORing in extra bits. (This functionality is needed by the JDK,
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* which uses 32 bits pre glyph idex, with the high 16 bits encoding
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* the composite font slot number)
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*
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* @param glyphs - the destination (32 bit) glyph array
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* @param extraBits - this value will be ORed with each glyph index
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* @param success - set to an error code if the operation fails
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*
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* @draft ICU 3.0
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*/
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void getGlyphs(le_uint32 glyphs[], le_uint32 extraBits, LEErrorCode &success) const;
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/**
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* This method copies the character index array into a caller supplied array.
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* The caller must ensure that the array is large enough to hold a
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* character index for each glyph.
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*
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* @param charIndices - the destiniation character index array
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* @param success - set to an error code if the operation fails
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*
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* @draft ICU 3.0
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*/
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void getCharIndices(le_int32 charIndices[], LEErrorCode &success) const;
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/**
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* This method copies the character index array into a caller supplied array.
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* The caller must ensure that the array is large enough to hold a
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* character index for each glyph.
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*
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* @param charIndices - the destiniation character index array
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* @param indexBase - an offset which will be added to each index
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* @param success - set to an error code if the operation fails
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*
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* @draft ICU 3.0
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*/
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void getCharIndices(le_int32 charIndices[], le_int32 indexBase, LEErrorCode &success) const;
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/**
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* This method copies the position array into a caller supplied array.
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* The caller must ensure that the array is large enough to hold an
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* X and Y position for each glyph, plus an extra X and Y for the
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* advance of the last glyph.
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*
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* @param positions - the destiniation position array
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* @param success - set to an error code if the operation fails
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*
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* @draft ICU 3.0
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*/
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void getGlyphPositions(float positions[], LEErrorCode &success) const;
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/**
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* This method returns the X and Y position of the glyph at
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* the given index.
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*
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* Input parameters:
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* @param glyphIndex - the index of the glyph
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*
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* Output parameters:
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* @param x - the glyph's X position
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* @param y - the glyph's Y position
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* @param success - set to an error code if the operation fails
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*
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* @draft ICU 3.0
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*/
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void getGlyphPosition(le_int32 glyphIndex, float &x, float &y, LEErrorCode &success) const;
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/**
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* This method allocates the glyph array, the char indices array and the insertion list. You
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* must call this method before using the object. This method also initializes the char indices
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* array.
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*
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* @param initialGlyphCount the initial size of the glyph and char indices arrays.
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* @param rightToLeft <code>true</code> if the original input text is right to left.
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* @param success set to an error code if the storage cannot be allocated of if the initial
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* glyph count is not positive.
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*
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* @draft ICU 3.0
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*/
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void allocateGlyphArray(le_int32 initialGlyphCount, le_bool rightToLeft, LEErrorCode &success);
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/**
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* This method allocates the storage for the glyph positions. It allocates one extra X, Y
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* position pair for the position just after the last glyph.
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*
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* @param success set to an error code if the positions array cannot be allocated.
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*
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* @return the number of X, Y position pairs allocated.
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*
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* @draft ICU 3.0
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*/
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le_int32 allocatePositions(LEErrorCode &success);
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/**
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* This method allocates the storage for the auxillary glyph data.
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*
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* @param success set to an error code if the aulillary data array cannot be allocated.
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*
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* @return the size of the auxillary data array.
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*
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* @draft ICU 3.0
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*/
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le_int32 allocateAuxData(LEErrorCode &success);
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/**
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* Copy the entire auxillary data array.
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*
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* @param auxData the auxillary data array will be copied to this address
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* @param success set to an error code if the data cannot be copied
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*
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* @draft ICU 3.0
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*/
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void getAuxData(void *auxData[], LEErrorCode &success) const;
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/**
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* Get the glyph ID for a particular glyph.
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*
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* @param glyphIndex the index into the glyph array
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* @param success set to an error code if the glyph ID cannot be retrieved.
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*
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* @return the glyph ID
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*
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* @draft ICU 3.0
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*/
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LEGlyphID getGlyphID(le_int32 glyphIndex, LEErrorCode &success) const;
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/**
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* Get the char index for a particular glyph.
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*
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* @param glyphIndex the index into the glyph array
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* @param success set to an error code if the char index cannot be retrieved.
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*
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* @return the character index
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*
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* @draft ICU 3.0
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*/
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le_int32 getCharIndex(le_int32 glyphIndex, LEErrorCode &success) const;
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/**
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* Get the auxillary data for a particular glyph.
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*
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* @param glyphIndex the index into the glyph array
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* @param success set to an error code if the auxillary data cannot be retrieved.
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*
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* @return the auxillary data
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*
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* @draft ICU 3.0
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*/
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void *getAuxData(le_int32 glyphIndex, LEErrorCode &success) const;
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/**
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* This operator allows direct access to the glyph array
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* using the index operator.
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*
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* @param glyphIndex the index into the glyph array
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*
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* @return a reference to the given location in the glyph array
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*
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* @draft ICU 3.0
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*/
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309 |
inline LEGlyphID &operator[](le_int32 glyphIndex) const;
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311 |
/**
|
|
sl@0
|
312 |
* Call this method to replace a single glyph in the glyph array
|
|
sl@0
|
313 |
* with multiple glyphs. This method uses the <code>LEInsertionList</code>
|
|
sl@0
|
314 |
* to do the insertion. It returns the address of storage where the new
|
|
sl@0
|
315 |
* glyph IDs can be stored. They will not actually be inserted into the
|
|
sl@0
|
316 |
* glyph array until <code>applyInsertions</code> is called.
|
|
sl@0
|
317 |
*
|
|
sl@0
|
318 |
* @param atIndex the index of the glyph to be replaced
|
|
sl@0
|
319 |
* @param insertCount the number of glyphs to replace it with
|
|
sl@0
|
320 |
* @param success set to an error code if the auxillary data cannot be retrieved.
|
|
sl@0
|
321 |
*
|
|
sl@0
|
322 |
* @return the address at which to store the replacement glyphs.
|
|
sl@0
|
323 |
*
|
|
sl@0
|
324 |
* @see LEInsetionList.h
|
|
sl@0
|
325 |
*
|
|
sl@0
|
326 |
* @draft ICU 3.0
|
|
sl@0
|
327 |
*/
|
|
sl@0
|
328 |
LEGlyphID *insertGlyphs(le_int32 atIndex, le_int32 insertCount,
|
|
sl@0
|
329 |
LEErrorCode& success);
|
|
sl@0
|
330 |
|
|
sl@0
|
331 |
/**
|
|
sl@0
|
332 |
* This method causes all of the glyph insertions recorded by
|
|
sl@0
|
333 |
* <code>insertGlyphs</code> to be applied to the glyph array. The
|
|
sl@0
|
334 |
* new slots in the char indices and the auxillary data arrays
|
|
sl@0
|
335 |
* will be filled in with the values for the glyph being replaced.
|
|
sl@0
|
336 |
*
|
|
sl@0
|
337 |
* @return the new size of the glyph array
|
|
sl@0
|
338 |
*
|
|
sl@0
|
339 |
* @see LEInsertionList.h
|
|
sl@0
|
340 |
*
|
|
sl@0
|
341 |
* @draft ICU 3.0
|
|
sl@0
|
342 |
*/
|
|
sl@0
|
343 |
le_int32 applyInsertions();
|
|
sl@0
|
344 |
|
|
sl@0
|
345 |
/**
|
|
sl@0
|
346 |
* Set the glyph ID for a particular glyph.
|
|
sl@0
|
347 |
*
|
|
sl@0
|
348 |
* @param glyphIndex the index of the glyph
|
|
sl@0
|
349 |
* @param glyphID the new glyph ID
|
|
sl@0
|
350 |
* @param success will be set to an error code if the glyph ID cannot be set.
|
|
sl@0
|
351 |
*
|
|
sl@0
|
352 |
* @draft ICU 3.0
|
|
sl@0
|
353 |
*/
|
|
sl@0
|
354 |
void setGlyphID(le_int32 glyphIndex, LEGlyphID glyphID, LEErrorCode &success);
|
|
sl@0
|
355 |
|
|
sl@0
|
356 |
/**
|
|
sl@0
|
357 |
* Set the char index for a particular glyph.
|
|
sl@0
|
358 |
*
|
|
sl@0
|
359 |
* @param glyphIndex the index of the glyph
|
|
sl@0
|
360 |
* @param charIndex the new char index
|
|
sl@0
|
361 |
* @param success will be set to an error code if the char index cannot be set.
|
|
sl@0
|
362 |
*
|
|
sl@0
|
363 |
* @draft ICU 3.0
|
|
sl@0
|
364 |
*/
|
|
sl@0
|
365 |
void setCharIndex(le_int32 glyphIndex, le_int32 charIndex, LEErrorCode &success);
|
|
sl@0
|
366 |
|
|
sl@0
|
367 |
/**
|
|
sl@0
|
368 |
* Set the X, Y position for a particular glyph.
|
|
sl@0
|
369 |
*
|
|
sl@0
|
370 |
* @param glyphIndex the index of the glyph
|
|
sl@0
|
371 |
* @param x the new X position
|
|
sl@0
|
372 |
* @param y the new Y position
|
|
sl@0
|
373 |
* @param success will be set to an error code if the position cannot be set.
|
|
sl@0
|
374 |
*
|
|
sl@0
|
375 |
* @draft ICU 3.0
|
|
sl@0
|
376 |
*/
|
|
sl@0
|
377 |
void setPosition(le_int32 glyphIndex, float x, float y, LEErrorCode &success);
|
|
sl@0
|
378 |
|
|
sl@0
|
379 |
/**
|
|
sl@0
|
380 |
* Adjust the X, Y position for a particular glyph.
|
|
sl@0
|
381 |
*
|
|
sl@0
|
382 |
* @param glyphIndex the index of the glyph
|
|
sl@0
|
383 |
* @param xAdjust the adjustment to the glyph's X position
|
|
sl@0
|
384 |
* @param yAdjust the adjustment to the glyph's Y position
|
|
sl@0
|
385 |
* @param success will be set to an error code if the glyph's position cannot be adjusted.
|
|
sl@0
|
386 |
*
|
|
sl@0
|
387 |
* @draft ICU 3.0
|
|
sl@0
|
388 |
*/
|
|
sl@0
|
389 |
void adjustPosition(le_int32 glyphIndex, float xAdjust, float yAdjust, LEErrorCode &success);
|
|
sl@0
|
390 |
|
|
sl@0
|
391 |
/**
|
|
sl@0
|
392 |
* Set the auxillary data for a particular glyph.
|
|
sl@0
|
393 |
*
|
|
sl@0
|
394 |
* @param glyphIndex the index of the glyph
|
|
sl@0
|
395 |
* @param auxData the new auxillary data
|
|
sl@0
|
396 |
* @param success will be set to an error code if the auxillary data cannot be set.
|
|
sl@0
|
397 |
*
|
|
sl@0
|
398 |
* @draft ICU 3.0
|
|
sl@0
|
399 |
*/
|
|
sl@0
|
400 |
void setAuxData(le_int32 glyphIndex, void *auxData, LEErrorCode &success);
|
|
sl@0
|
401 |
|
|
sl@0
|
402 |
/**
|
|
sl@0
|
403 |
* Delete the glyph array and replace it with the one
|
|
sl@0
|
404 |
* in <code>from</code>. Set the glyph array pointer
|
|
sl@0
|
405 |
* in <code>from</code> to <code>NULL</code>.
|
|
sl@0
|
406 |
*
|
|
sl@0
|
407 |
* @param from the <code>LEGlyphStorage</code> object from which
|
|
sl@0
|
408 |
* to get the new glyph array.
|
|
sl@0
|
409 |
*
|
|
sl@0
|
410 |
* @draft ICU 3.0
|
|
sl@0
|
411 |
*/
|
|
sl@0
|
412 |
void adoptGlyphArray(LEGlyphStorage &from);
|
|
sl@0
|
413 |
|
|
sl@0
|
414 |
/**
|
|
sl@0
|
415 |
* Delete the char indices array and replace it with the one
|
|
sl@0
|
416 |
* in <code>from</code>. Set the char indices array pointer
|
|
sl@0
|
417 |
* in <code>from</code> to <code>NULL</code>.
|
|
sl@0
|
418 |
*
|
|
sl@0
|
419 |
* @param from the <code>LEGlyphStorage</code> object from which
|
|
sl@0
|
420 |
* to get the new char indices array.
|
|
sl@0
|
421 |
*
|
|
sl@0
|
422 |
* @draft ICU 3.0
|
|
sl@0
|
423 |
*/
|
|
sl@0
|
424 |
void adoptCharIndicesArray(LEGlyphStorage &from);
|
|
sl@0
|
425 |
|
|
sl@0
|
426 |
/**
|
|
sl@0
|
427 |
* Delete the position array and replace it with the one
|
|
sl@0
|
428 |
* in <code>from</code>. Set the position array pointer
|
|
sl@0
|
429 |
* in <code>from</code> to <code>NULL</code>.
|
|
sl@0
|
430 |
*
|
|
sl@0
|
431 |
* @param from the <code>LEGlyphStorage</code> object from which
|
|
sl@0
|
432 |
* to get the new position array.
|
|
sl@0
|
433 |
*
|
|
sl@0
|
434 |
* @draft ICU 3.0
|
|
sl@0
|
435 |
*/
|
|
sl@0
|
436 |
void adoptPositionArray(LEGlyphStorage &from);
|
|
sl@0
|
437 |
|
|
sl@0
|
438 |
/**
|
|
sl@0
|
439 |
* Delete the auxillary data array and replace it with the one
|
|
sl@0
|
440 |
* in <code>from</code>. Set the auxillary data array pointer
|
|
sl@0
|
441 |
* in <code>from</code> to <code>NULL</code>.
|
|
sl@0
|
442 |
*
|
|
sl@0
|
443 |
* @param from the <code>LEGlyphStorage</code> object from which
|
|
sl@0
|
444 |
* to get the new auxillary data array.
|
|
sl@0
|
445 |
*
|
|
sl@0
|
446 |
* @draft ICU 3.0
|
|
sl@0
|
447 |
*/
|
|
sl@0
|
448 |
void adoptAuxDataArray(LEGlyphStorage &from);
|
|
sl@0
|
449 |
|
|
sl@0
|
450 |
/**
|
|
sl@0
|
451 |
* Change the glyph count of this object to be the same
|
|
sl@0
|
452 |
* as the one in <code>from</code>.
|
|
sl@0
|
453 |
*
|
|
sl@0
|
454 |
* @param from the <code>LEGlyphStorage</code> object from which
|
|
sl@0
|
455 |
* to get the new glyph count.
|
|
sl@0
|
456 |
*
|
|
sl@0
|
457 |
* @draft ICU 3.0
|
|
sl@0
|
458 |
*/
|
|
sl@0
|
459 |
void adoptGlyphCount(LEGlyphStorage &from);
|
|
sl@0
|
460 |
|
|
sl@0
|
461 |
/**
|
|
sl@0
|
462 |
* Change the glyph count of this object to the given value.
|
|
sl@0
|
463 |
*
|
|
sl@0
|
464 |
* @param newGlyphCount the new glyph count.
|
|
sl@0
|
465 |
*
|
|
sl@0
|
466 |
* @draft ICU 3.0
|
|
sl@0
|
467 |
*/
|
|
sl@0
|
468 |
void adoptGlyphCount(le_int32 newGlyphCount);
|
|
sl@0
|
469 |
|
|
sl@0
|
470 |
/**
|
|
sl@0
|
471 |
* This method frees the glyph, character index, position and
|
|
sl@0
|
472 |
* auxillary data arrays so that the LayoutEngine can be reused
|
|
sl@0
|
473 |
* to layout a different characer array. (This method is also called
|
|
sl@0
|
474 |
* by the destructor)
|
|
sl@0
|
475 |
*
|
|
sl@0
|
476 |
* @draft ICU 3.0
|
|
sl@0
|
477 |
*/
|
|
sl@0
|
478 |
void reset();
|
|
sl@0
|
479 |
|
|
sl@0
|
480 |
/**
|
|
sl@0
|
481 |
* This method move glyph of Malayalam RAKAR to the left of the preceding
|
|
sl@0
|
482 |
* consonant cluster.
|
|
sl@0
|
483 |
*
|
|
sl@0
|
484 |
* @param aGlyphID the <code>LEGlyphID</code> of RAKAR
|
|
sl@0
|
485 |
*
|
|
sl@0
|
486 |
* @draft Added by Nokia
|
|
sl@0
|
487 |
*/
|
|
sl@0
|
488 |
void forMlylRakar(LEGlyphID aGlyphID);
|
|
sl@0
|
489 |
|
|
sl@0
|
490 |
/**
|
|
sl@0
|
491 |
* ICU "poor man's RTTI", returns a UClassID for the actual class.
|
|
sl@0
|
492 |
*
|
|
sl@0
|
493 |
* @draft ICU 3.0
|
|
sl@0
|
494 |
*/
|
|
sl@0
|
495 |
virtual UClassID getDynamicClassID() const;
|
|
sl@0
|
496 |
|
|
sl@0
|
497 |
/**
|
|
sl@0
|
498 |
* ICU "poor man's RTTI", returns a UClassID for this class.
|
|
sl@0
|
499 |
*
|
|
sl@0
|
500 |
* @draft ICU 3.0
|
|
sl@0
|
501 |
*/
|
|
sl@0
|
502 |
static UClassID getStaticClassID();
|
|
sl@0
|
503 |
};
|
|
sl@0
|
504 |
|
|
sl@0
|
505 |
inline le_int32 LEGlyphStorage::getGlyphCount() const
|
|
sl@0
|
506 |
{
|
|
sl@0
|
507 |
return fGlyphCount;
|
|
sl@0
|
508 |
}
|
|
sl@0
|
509 |
|
|
sl@0
|
510 |
inline LEGlyphID &LEGlyphStorage::operator[](le_int32 glyphIndex) const
|
|
sl@0
|
511 |
{
|
|
sl@0
|
512 |
return fGlyphs[glyphIndex];
|
|
sl@0
|
513 |
}
|
|
sl@0
|
514 |
|
|
sl@0
|
515 |
|
|
sl@0
|
516 |
U_NAMESPACE_END
|
|
sl@0
|
517 |
#endif
|
|
sl@0
|
518 |
|