| /* |
| ********************************************************************** |
| * Copyright (C) 1998-2004, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ********************************************************************** |
| */ |
| |
| #ifndef __LEGLYPHSTORAGE_H |
| #define __LEGLYPHSTORAGE_H |
| |
| #include "LETypes.h" |
| #include "LEInsertionList.h" |
| |
| 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 <code>LEInsertionList</code> 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 <code>LEInsertionCallback</code>. The <code>LEInsertionList</code> |
| * 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 <code>true</code> if <code>LEInsertionList</code> 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 <code>LEGlyphStorage</code> object. You must call |
| * <code>allocateGlyphArray, allocatePositions and allocateAuxData</code> |
| * 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 |
| */ |
| le_int32 getGlyphCount() const |
| { |
| return fGlyphCount; |
| }; |
| |
| /** |
| * 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 <code>true</code> 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 |
| */ |
| 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 <code>LEInsertionList</code> |
| * 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 <code>applyInsertions</code> is called. |
| * |
| * @param atIndex the index of the glyph to be replaced |
| * @param insertCount the number of glyphs to replace it with |
| * |
| * @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); |
| |
| /** |
| * This method causes all of the glyph insertions recorded by |
| * <code>insertGlyphs</code> 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 <code>from</code>. Set the glyph array pointer |
| * in <code>from</code> to <code>NULL</code>. |
| * |
| * @param from the <code>LEGlyphStorage</code> 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 <code>from</code>. Set the char indices array pointer |
| * in <code>from</code> to <code>NULL</code>. |
| * |
| * @param from the <code>LEGlyphStorage</code> 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 <code>from</code>. Set the position array pointer |
| * in <code>from</code> to <code>NULL</code>. |
| * |
| * @param from the <code>LEGlyphStorage</code> 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 <code>from</code>. Set the auxillary data array pointer |
| * in <code>from</code> to <code>NULL</code>. |
| * |
| * @param from the <code>LEGlyphStorage</code> 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 <code>from</code>. |
| * |
| * @param from the <code>LEGlyphStorage</code> 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(); |
| |
| /** |
| * 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 LEGlyphID &LEGlyphStorage::operator[](le_int32 glyphIndex) const |
| { |
| return fGlyphs[glyphIndex]; |
| } |
| |
| |
| U_NAMESPACE_END |
| #endif |
| |
