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      1 /*
      2  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "GlyphPageTreeNode.h"
     31 
     32 #include "SimpleFontData.h"
     33 
     34 namespace WebCore {
     35 
     36 bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
     37 {
     38     // bufferLength will be greater than the requested number of glyphs if the buffer contains surrogate pairs.
     39     // We won't support this for now.
     40     if (bufferLength > length)
     41         return false;
     42 
     43     bool haveGlyphs = false;
     44 
     45     HDC dc = GetDC((HWND)0);
     46     SaveDC(dc);
     47     SelectObject(dc, fontData->platformData().hfont());
     48 
     49     TEXTMETRIC tm;
     50     GetTextMetrics(dc, &tm);
     51 
     52     WORD localGlyphBuffer[GlyphPage::size * 2];
     53     DWORD result = GetGlyphIndices(dc, buffer, bufferLength, localGlyphBuffer, 0);
     54     bool success = result != GDI_ERROR && static_cast<unsigned>(result) == bufferLength;
     55     if (success) {
     56         for (unsigned i = 0; i < length; i++) {
     57             Glyph glyph = localGlyphBuffer[i];
     58             if (!glyph)
     59                 setGlyphDataForIndex(offset + i, 0, 0);
     60             else {
     61                 setGlyphDataForIndex(offset + i, glyph, fontData);
     62                 haveGlyphs = true;
     63             }
     64         }
     65     }
     66     RestoreDC(dc, -1);
     67     ReleaseDC(0, dc);
     68 
     69     return haveGlyphs;
     70 }
     71 
     72 }
     73