author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 09:20:16 +0200 | |
changeset 25 | 0ed94ceaa377 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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* its contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef GlyphWidthMap_h |
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#define GlyphWidthMap_h |
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#include <wtf/unicode/Unicode.h> |
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#include <wtf/Noncopyable.h> |
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#include <wtf/HashMap.h> |
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namespace WebCore { |
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typedef unsigned short Glyph; |
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const float cGlyphWidthUnknown = -1; |
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class GlyphWidthMap : Noncopyable { |
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public: |
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GlyphWidthMap() : m_filledPrimaryPage(false), m_pages(0) {} |
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~GlyphWidthMap() { if (m_pages) { deleteAllValues(*m_pages); delete m_pages; } } |
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float widthForGlyph(Glyph); |
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void setWidthForGlyph(Glyph, float); |
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private: |
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struct GlyphWidthPage { |
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static const size_t size = 256; // Usually covers Latin-1 in a single page. |
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float m_widths[size]; |
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float widthForGlyph(Glyph g) const { return m_widths[g % size]; } |
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void setWidthForGlyph(Glyph g, float w) |
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{ |
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setWidthForIndex(g % size, w); |
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} |
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void setWidthForIndex(unsigned index, float w) |
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{ |
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m_widths[index] = w; |
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} |
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}; |
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GlyphWidthPage* locatePage(unsigned page); |
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bool m_filledPrimaryPage; |
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GlyphWidthPage m_primaryPage; // We optimize for the page that contains glyph indices 0-255. |
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HashMap<int, GlyphWidthPage*>* m_pages; |
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}; |
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} |
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#endif |