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Diffstat (limited to 'WebCore/platform/graphics/win/UniscribeController.h')
-rw-r--r-- | WebCore/platform/graphics/win/UniscribeController.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/win/UniscribeController.h b/WebCore/platform/graphics/win/UniscribeController.h new file mode 100644 index 0000000..6ea45e1 --- /dev/null +++ b/WebCore/platform/graphics/win/UniscribeController.h @@ -0,0 +1,82 @@ +/* + * Copyright (C) 2007 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of + * its contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef UniscribeController_h +#define UniscribeController_h + +#include <usp10.h> +#include "Font.h" +#include "GlyphBuffer.h" +#include "Vector.h" + +namespace WebCore { + +class UniscribeController { +public: + UniscribeController(const Font*, const TextRun&); + + // Advance and measure/place up to the specified character. + void advance(unsigned to, GlyphBuffer* = 0); + + // Compute the character offset for a given x coordinate. + int offsetForPosition(int x, bool includePartialGlyphs); + + // Returns the width of everything we've consumed so far. + float runWidthSoFar() const { return m_runWidthSoFar; } + +private: + void resetControlAndState(); + + void itemizeShapeAndPlace(const UChar*, unsigned length, const SimpleFontData*, GlyphBuffer*); + bool shapeAndPlaceItem(const UChar*, unsigned index, const SimpleFontData*, GlyphBuffer*); + bool shape(const UChar* str, int len, SCRIPT_ITEM item, const SimpleFontData* fontData, + Vector<WORD>& glyphs, Vector<WORD>& clusters, + Vector<SCRIPT_VISATTR>& visualAttributes); + + const Font& m_font; + const TextRun& m_run; + + SCRIPT_CONTROL m_control; + SCRIPT_STATE m_state; + Vector<SCRIPT_ITEM> m_items; + + unsigned m_currentCharacter; + int m_end; + + float m_runWidthSoFar; + float m_padding; + float m_padPerSpace; + + bool m_computingOffsetPosition; + bool m_includePartialGlyphs; + float m_offsetX; + int m_offsetPosition; +}; + +} +#endif |