1/*
2 * Copyright (C) 2006, 2007 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#include "Font.h"
32
33#include "SimpleFontData.h"
34#include "WebCoreSystemInterface.h"
35#include <ApplicationServices/ApplicationServices.h>
36
37namespace WebCore {
38
39#ifndef BUILDING_ON_TIGER
40static bool shouldUseCoreText(UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
41{
42    if (fontData->platformData().widthVariant() != RegularWidth || fontData->hasVerticalGlyphs()) {
43        // Ideographs don't have a vertical variant or width variants.
44        for (unsigned i = 0; i < bufferLength; ++i) {
45            if (!Font::isCJKIdeograph(buffer[i]))
46                return true;
47        }
48    }
49
50    return false;
51}
52#endif
53
54bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
55{
56    bool haveGlyphs = false;
57
58#ifndef BUILDING_ON_TIGER
59    if (!shouldUseCoreText(buffer, bufferLength, fontData)) {
60        Vector<CGGlyph, 512> glyphs(bufferLength);
61        wkGetGlyphsForCharacters(fontData->platformData().cgFont(), buffer, glyphs.data(), bufferLength);
62        for (unsigned i = 0; i < length; ++i) {
63            if (!glyphs[i])
64                setGlyphDataForIndex(offset + i, 0, 0);
65            else {
66                setGlyphDataForIndex(offset + i, glyphs[i], fontData);
67                haveGlyphs = true;
68            }
69        }
70    } else {
71        // We ask CoreText for possible vertical variant glyphs
72        RetainPtr<CFStringRef> string(AdoptCF, CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, buffer, bufferLength, kCFAllocatorNull));
73        RetainPtr<CFAttributedStringRef> attributedString(AdoptCF, CFAttributedStringCreate(kCFAllocatorDefault, string.get(), fontData->getCFStringAttributes(0, fontData->hasVerticalGlyphs() ? Vertical : Horizontal)));
74        RetainPtr<CTLineRef> line(AdoptCF, CTLineCreateWithAttributedString(attributedString.get()));
75
76        CFArrayRef runArray = CTLineGetGlyphRuns(line.get());
77        CFIndex runCount = CFArrayGetCount(runArray);
78
79        // Initialize glyph entries
80        for (unsigned index = 0; index < length; ++index)
81            setGlyphDataForIndex(offset + index, 0, 0);
82
83        Vector<CGGlyph, 512> glyphVector;
84        Vector<CFIndex, 512> indexVector;
85        bool done = false;
86
87        // For the CGFont comparison in the loop, use the CGFont that Core Text assigns to the CTFont. This may
88        // be non-CFEqual to fontData->platformData().cgFont().
89        RetainPtr<CGFontRef> cgFont(AdoptCF, CTFontCopyGraphicsFont(fontData->platformData().ctFont(), 0));
90
91        for (CFIndex r = 0; r < runCount && !done ; ++r) {
92            // CTLine could map characters over multiple fonts using its own font fallback list.
93            // We need to pick runs that use the exact font we need, i.e., fontData->platformData().ctFont().
94            CTRunRef ctRun = static_cast<CTRunRef>(CFArrayGetValueAtIndex(runArray, r));
95            ASSERT(CFGetTypeID(ctRun) == CTRunGetTypeID());
96
97            CFDictionaryRef attributes = CTRunGetAttributes(ctRun);
98            CTFontRef runFont = static_cast<CTFontRef>(CFDictionaryGetValue(attributes, kCTFontAttributeName));
99            RetainPtr<CGFontRef> runCGFont(AdoptCF, CTFontCopyGraphicsFont(runFont, 0));
100            // Use CGFont here as CFEqual for CTFont counts all attributes for font.
101            if (CFEqual(cgFont.get(), runCGFont.get())) {
102                // This run uses the font we want. Extract glyphs.
103                CFIndex glyphCount = CTRunGetGlyphCount(ctRun);
104                const CGGlyph* glyphs = CTRunGetGlyphsPtr(ctRun);
105                if (!glyphs) {
106                    glyphVector.resize(glyphCount);
107                    CTRunGetGlyphs(ctRun, CFRangeMake(0, 0), glyphVector.data());
108                    glyphs = glyphVector.data();
109                }
110                const CFIndex* stringIndices = CTRunGetStringIndicesPtr(ctRun);
111                if (!stringIndices) {
112                    indexVector.resize(glyphCount);
113                    CTRunGetStringIndices(ctRun, CFRangeMake(0, 0), indexVector.data());
114                    stringIndices = indexVector.data();
115                }
116
117                for (CFIndex i = 0; i < glyphCount; ++i) {
118                    if (stringIndices[i] >= static_cast<CFIndex>(length)) {
119                        done = true;
120                        break;
121                    }
122                    if (glyphs[i]) {
123                        setGlyphDataForIndex(offset + stringIndices[i], glyphs[i], fontData);
124                        haveGlyphs = true;
125                    }
126                }
127            }
128        }
129    }
130#else
131    // Use an array of long so we get good enough alignment.
132    long glyphVector[(GLYPH_VECTOR_SIZE + sizeof(long) - 1) / sizeof(long)];
133
134    OSStatus status = wkInitializeGlyphVector(GlyphPage::size, &glyphVector);
135    if (status != noErr)
136        // This should never happen, perhaps indicates a bad font!  If it does the
137        // font substitution code will find an alternate font.
138        return false;
139
140    wkConvertCharToGlyphs(fontData->m_styleGroup, buffer, bufferLength, &glyphVector);
141
142    unsigned numGlyphs = wkGetGlyphVectorNumGlyphs(&glyphVector);
143    if (numGlyphs != length) {
144        // This should never happen, perhaps indicates a bad font?
145        // If it does happen, the font substitution code will find an alternate font.
146        wkClearGlyphVector(&glyphVector);
147        return false;
148    }
149
150    ATSLayoutRecord* glyphRecord = (ATSLayoutRecord*)wkGetGlyphVectorFirstRecord(glyphVector);
151    for (unsigned i = 0; i < length; i++) {
152        Glyph glyph = glyphRecord->glyphID;
153        if (!glyph)
154            setGlyphDataForIndex(offset + i, 0, 0);
155        else {
156            setGlyphDataForIndex(offset + i, glyph, fontData);
157            haveGlyphs = true;
158        }
159        glyphRecord = (ATSLayoutRecord *)((char *)glyphRecord + wkGetGlyphVectorRecordSize(glyphVector));
160    }
161    wkClearGlyphVector(&glyphVector);
162#endif
163
164    return haveGlyphs;
165}
166
167} // namespace WebCore
168