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| 1 /* | |
| 2 * Copyright (C) 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 "SimpleFontData.h" | |
| 31 | |
| 32 #include <windows.h> | |
| 33 | |
| 34 #include "Font.h" | |
| 35 #include "FontCache.h" | |
| 36 #include "FontDescription.h" | |
| 37 #include "HWndDC.h" | |
| 38 #include <cairo.h> | |
| 39 #include <cairo-win32.h> | |
| 40 #include <mlang.h> | |
| 41 #include <wtf/MathExtras.h> | |
| 42 | |
| 43 namespace WebCore { | |
| 44 | |
| 45 void SimpleFontData::platformInit() | |
| 46 { | |
| 47 m_syntheticBoldOffset = m_platformData.syntheticBold() ? 1.0f : 0.f; | |
| 48 m_scriptCache = 0; | |
| 49 m_scriptFontProperties = 0; | |
| 50 m_isSystemFont = false; | |
| 51 | |
| 52 if (m_platformData.useGDI()) | |
| 53 return initGDIFont(); | |
| 54 | |
| 55 if (!m_platformData.size()) { | |
| 56 m_fontMetrics.reset(); | |
| 57 m_avgCharWidth = 0; | |
| 58 m_maxCharWidth = 0; | |
| 59 m_isSystemFont = false; | |
| 60 m_scriptCache = 0; | |
| 61 m_scriptFontProperties = 0; | |
| 62 return; | |
| 63 } | |
| 64 | |
| 65 HWndDC dc(0); | |
| 66 SaveDC(dc); | |
| 67 | |
| 68 cairo_scaled_font_t* scaledFont = m_platformData.scaledFont(); | |
| 69 const double metricsMultiplier = cairo_win32_scaled_font_get_metrics_factor(
scaledFont) * m_platformData.size(); | |
| 70 | |
| 71 cairo_win32_scaled_font_select_font(scaledFont, dc); | |
| 72 | |
| 73 TEXTMETRIC textMetrics; | |
| 74 GetTextMetrics(dc, &textMetrics); | |
| 75 float ascent = textMetrics.tmAscent * metricsMultiplier; | |
| 76 float descent = textMetrics.tmDescent * metricsMultiplier; | |
| 77 float xHeight = ascent * 0.56f; // Best guess for xHeight for non-Truetype f
onts. | |
| 78 float lineGap = textMetrics.tmExternalLeading * metricsMultiplier; | |
| 79 | |
| 80 int faceLength = ::GetTextFace(dc, 0, 0); | |
| 81 Vector<WCHAR> faceName(faceLength); | |
| 82 ::GetTextFace(dc, faceLength, faceName.data()); | |
| 83 m_isSystemFont = !wcscmp(faceName.data(), L"Lucida Grande"); | |
| 84 | |
| 85 ascent = ascentConsideringMacAscentHack(faceName.data(), ascent, descent); | |
| 86 | |
| 87 m_fontMetrics.setAscent(ascent); | |
| 88 m_fontMetrics.setDescent(descent); | |
| 89 m_fontMetrics.setLineGap(lineGap); | |
| 90 m_fontMetrics.setLineSpacing(lroundf(ascent) + lroundf(descent) + lroundf(li
neGap)); | |
| 91 m_avgCharWidth = textMetrics.tmAveCharWidth * metricsMultiplier; | |
| 92 m_maxCharWidth = textMetrics.tmMaxCharWidth * metricsMultiplier; | |
| 93 | |
| 94 cairo_text_extents_t extents; | |
| 95 cairo_scaled_font_text_extents(scaledFont, "x", &extents); | |
| 96 xHeight = -extents.y_bearing; | |
| 97 | |
| 98 m_fontMetrics.setXHeight(xHeight); | |
| 99 cairo_win32_scaled_font_done_font(scaledFont); | |
| 100 | |
| 101 m_scriptCache = 0; | |
| 102 m_scriptFontProperties = 0; | |
| 103 | |
| 104 RestoreDC(dc, -1); | |
| 105 } | |
| 106 | |
| 107 FloatRect SimpleFontData::platformBoundsForGlyph(Glyph glyph) const | |
| 108 { | |
| 109 if (m_platformData.useGDI()) | |
| 110 return boundsForGDIGlyph(glyph); | |
| 111 //FIXME: Implement this | |
| 112 return FloatRect(); | |
| 113 } | |
| 114 | |
| 115 float SimpleFontData::platformWidthForGlyph(Glyph glyph) const | |
| 116 { | |
| 117 if (m_platformData.useGDI()) | |
| 118 return widthForGDIGlyph(glyph); | |
| 119 | |
| 120 if (!m_platformData.size()) | |
| 121 return 0; | |
| 122 | |
| 123 HWndDC dc(0); | |
| 124 SaveDC(dc); | |
| 125 | |
| 126 cairo_scaled_font_t* scaledFont = m_platformData.scaledFont(); | |
| 127 cairo_win32_scaled_font_select_font(scaledFont, dc); | |
| 128 | |
| 129 int width; | |
| 130 GetCharWidthI(dc, glyph, 1, 0, &width); | |
| 131 | |
| 132 cairo_win32_scaled_font_done_font(scaledFont); | |
| 133 | |
| 134 RestoreDC(dc, -1); | |
| 135 | |
| 136 const double metricsMultiplier = cairo_win32_scaled_font_get_metrics_factor(
scaledFont) * m_platformData.size(); | |
| 137 return width * metricsMultiplier; | |
| 138 } | |
| 139 | |
| 140 } | |
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