1/* 2 * Copyright (c) 2006, 2007, 2008, Google 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "config.h" 32#include "public/platform/Platform.h" 33 34#include "SkTypeface.h" 35#include "platform/LayoutTestSupport.h" 36#include "platform/RuntimeEnabledFeatures.h" 37#include "platform/fonts/harfbuzz/FontPlatformDataHarfBuzz.h" 38#include "public/platform/linux/WebFontInfo.h" 39#include "public/platform/linux/WebFontRenderStyle.h" 40#include "public/platform/linux/WebSandboxSupport.h" 41 42namespace WebCore { 43 44static SkPaint::Hinting skiaHinting = SkPaint::kNormal_Hinting; 45static bool useSkiaAutoHint = true; 46static bool useSkiaBitmaps = true; 47static bool useSkiaAntiAlias = true; 48static bool useSkiaSubpixelRendering = false; 49 50void FontPlatformData::setHinting(SkPaint::Hinting hinting) 51{ 52 skiaHinting = hinting; 53} 54 55void FontPlatformData::setAutoHint(bool useAutoHint) 56{ 57 useSkiaAutoHint = useAutoHint; 58} 59 60void FontPlatformData::setUseBitmaps(bool useBitmaps) 61{ 62 useSkiaBitmaps = useBitmaps; 63} 64 65void FontPlatformData::setAntiAlias(bool useAntiAlias) 66{ 67 useSkiaAntiAlias = useAntiAlias; 68} 69 70void FontPlatformData::setSubpixelRendering(bool useSubpixelRendering) 71{ 72 useSkiaSubpixelRendering = useSubpixelRendering; 73} 74 75void FontPlatformData::setupPaint(SkPaint* paint, GraphicsContext*) const 76{ 77 paint->setAntiAlias(m_style.useAntiAlias); 78 paint->setHinting(static_cast<SkPaint::Hinting>(m_style.hintStyle)); 79 paint->setEmbeddedBitmapText(m_style.useBitmaps); 80 paint->setAutohinted(m_style.useAutoHint); 81 if (m_style.useAntiAlias) 82 paint->setLCDRenderText(m_style.useSubpixelRendering); 83 84 // TestRunner specifically toggles the subpixel positioning flag. 85 if (RuntimeEnabledFeatures::subpixelFontScalingEnabled() 86 && paint->getHinting() != SkPaint::kFull_Hinting 87 && !isRunningLayoutTest()) 88 paint->setSubpixelText(true); 89 else 90 paint->setSubpixelText(m_style.useSubpixelPositioning); 91 92 const float ts = m_textSize >= 0 ? m_textSize : 12; 93 paint->setTextSize(SkFloatToScalar(ts)); 94 paint->setTypeface(m_typeface.get()); 95 paint->setFakeBoldText(m_syntheticBold); 96 paint->setTextSkewX(m_syntheticItalic ? -SK_Scalar1 / 4 : 0); 97} 98 99 100static inline void getRenderStyleForStrike(FontRenderStyle& fontRenderStyle, const char* font, int sizeAndStyle) 101{ 102 blink::WebFontRenderStyle style; 103 104#if OS(ANDROID) 105 style.setDefaults(); 106#else 107 if (!font || !*font) 108 style.setDefaults(); // It's probably a webfont. Take the system defaults. 109 else if (blink::Platform::current()->sandboxSupport()) 110 blink::Platform::current()->sandboxSupport()->getRenderStyleForStrike(font, sizeAndStyle, &style); 111 else 112 blink::WebFontInfo::renderStyleForStrike(font, sizeAndStyle, &style); 113#endif 114 115 style.toFontRenderStyle(&fontRenderStyle); 116} 117 118void FontPlatformData::querySystemForRenderStyle(bool useSkiaSubpixelPositioning) 119{ 120 getRenderStyleForStrike(m_style, m_family.data(), (((int)m_textSize) << 2) | (m_typeface->style() & 3)); 121 122 // Fix FontRenderStyle::NoPreference to actual styles. 123 if (m_style.useAntiAlias == FontRenderStyle::NoPreference) 124 m_style.useAntiAlias = useSkiaAntiAlias; 125 126 if (!m_style.useHinting) 127 m_style.hintStyle = SkPaint::kNo_Hinting; 128 else if (m_style.useHinting == FontRenderStyle::NoPreference) 129 m_style.hintStyle = skiaHinting; 130 131 if (m_style.useBitmaps == FontRenderStyle::NoPreference) 132 m_style.useBitmaps = useSkiaBitmaps; 133 if (m_style.useAutoHint == FontRenderStyle::NoPreference) 134 m_style.useAutoHint = useSkiaAutoHint; 135 if (m_style.useAntiAlias == FontRenderStyle::NoPreference) 136 m_style.useAntiAlias = useSkiaAntiAlias; 137 if (m_style.useSubpixelRendering == FontRenderStyle::NoPreference) 138 m_style.useSubpixelRendering = useSkiaSubpixelRendering; 139 140 // TestRunner specifically toggles the subpixel positioning flag. 141 if (m_style.useSubpixelPositioning == FontRenderStyle::NoPreference 142 || isRunningLayoutTest()) 143 m_style.useSubpixelPositioning = useSkiaSubpixelPositioning; 144} 145 146bool FontPlatformData::defaultUseSubpixelPositioning() 147{ 148 return FontDescription::subpixelPositioning(); 149} 150 151} // namespace WebCore 152