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 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 43namespace WebCore { 44 45void 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 fonts. 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(lineGap)); 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 107FloatRect SimpleFontData::platformBoundsForGlyph(Glyph glyph) const 108{ 109 if (m_platformData.useGDI()) 110 return boundsForGDIGlyph(glyph); 111 //FIXME: Implement this 112 return FloatRect(); 113} 114 115float 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} 141