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| 1 /* | |
| 2 * Copyright (c) 2012 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 "platform/fonts/harfbuzz/HarfBuzzFace.h" | |
| 33 | |
| 34 #include "hb-coretext.h" | |
| 35 #include "hb.h" | |
| 36 #include "platform/fonts/FontPlatformData.h" | |
| 37 #include "platform/fonts/SimpleFontData.h" | |
| 38 #include "platform/fonts/harfbuzz/HarfBuzzShaper.h" | |
| 39 #include <AppKit/AppKit.h> | |
| 40 #include <ApplicationServices/ApplicationServices.h> | |
| 41 | |
| 42 // The names of these constants were taken from history | |
| 43 // /trunk/WebKit/WebCoreSupport.subproj/WebTextRenderer.m@9311. The values | |
| 44 // were derived from the assembly of libWebKitSystemInterfaceLeopard.a. | |
| 45 enum CGFontRenderingMode { | |
| 46 kCGFontRenderingMode1BitPixelAligned = 0x0, | |
| 47 kCGFontRenderingModeAntialiasedPixelAligned = 0x1, | |
| 48 kCGFontRenderingModeAntialiased = 0xd | |
| 49 }; | |
| 50 | |
| 51 // Forward declare Mac SPIs. | |
| 52 extern "C" { | |
| 53 // Request for public API: rdar://13803586 | |
| 54 bool CGFontGetGlyphAdvancesForStyle(CGFontRef font, CGAffineTransform* transform
, CGFontRenderingMode renderingMode, ATSGlyphRef* glyph, size_t count, CGSize* a
dvance); | |
| 55 } | |
| 56 | |
| 57 static CGFontRenderingMode cgFontRenderingModeForNSFont(NSFont* font) { | |
| 58 if (!font) | |
| 59 return kCGFontRenderingModeAntialiasedPixelAligned; | |
| 60 | |
| 61 switch ([font renderingMode]) { | |
| 62 case NSFontIntegerAdvancementsRenderingMode: return kCGFontRenderingMode
1BitPixelAligned; | |
| 63 case NSFontAntialiasedIntegerAdvancementsRenderingMode: return kCGFontRe
nderingModeAntialiasedPixelAligned; | |
| 64 default: return kCGFontRenderingModeAntialiased; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 namespace blink { | |
| 69 | |
| 70 static void advanceForGlyph(Glyph glyph, const FontPlatformData& platformData, C
GSize* advance) { | |
| 71 float pointSize = platformData.m_textSize; | |
| 72 NSFont *font = platformData.font(); | |
| 73 CGAffineTransform m = CGAffineTransformMakeScale(pointSize, pointSize); | |
| 74 if (!CGFontGetGlyphAdvancesForStyle(platformData.cgFont(), &m, cgFontRenderi
ngModeForNSFont(font), &glyph, 1, advance)) { | |
| 75 WTF_LOG_ERROR("Unable to retrieve glyph advance for %@ %f", [font displa
yName], pointSize); | |
| 76 advance->width = 0; | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 static hb_position_t floatToHarfBuzzPosition(CGFloat value) | |
| 81 { | |
| 82 return static_cast<hb_position_t>(value * (1 << 16)); | |
| 83 } | |
| 84 | |
| 85 static hb_bool_t getGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unic
ode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData) | |
| 86 { | |
| 87 CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont(); | |
| 88 UniChar characters[4]; | |
| 89 CGGlyph cgGlyphs[4]; | |
| 90 size_t length = 0; | |
| 91 U16_APPEND_UNSAFE(characters, length, unicode); | |
| 92 if (!CTFontGetGlyphsForCharacters(ctFont, characters, cgGlyphs, length)) | |
| 93 return false; | |
| 94 *glyph = cgGlyphs[0]; | |
| 95 return true; | |
| 96 } | |
| 97 | |
| 98 | |
| 99 static hb_position_t getGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData
, hb_codepoint_t glyph, void* userData) | |
| 100 { | |
| 101 CGSize advance; | |
| 102 FontPlatformData* platformData = reinterpret_cast<FontPlatformData*>(fontDat
a); | |
| 103 advanceForGlyph(glyph, *platformData, &advance); | |
| 104 float syntheticBoldOffset = platformData->m_syntheticBold ? 1.0f : 0.0f; | |
| 105 return floatToHarfBuzzPosition(advance.width + syntheticBoldOffset); | |
| 106 } | |
| 107 | |
| 108 static hb_bool_t getGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_
codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData) | |
| 109 { | |
| 110 return true; | |
| 111 } | |
| 112 | |
| 113 static hb_bool_t getGlyphExtents(hb_font_t* hbFont, void* fontData, hb_codepoint
_t glyph, hb_glyph_extents_t* extents, void* userData) | |
| 114 { | |
| 115 CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont(); | |
| 116 CGRect cgRect; | |
| 117 CGGlyph cgGlyph = glyph; | |
| 118 if (CTFontGetBoundingRectsForGlyphs(ctFont, kCTFontDefaultOrientation, &cgGl
yph, &cgRect, 1) == CGRectNull) | |
| 119 return false; | |
| 120 extents->x_bearing = floatToHarfBuzzPosition(cgRect.origin.x); | |
| 121 extents->y_bearing = -floatToHarfBuzzPosition(cgRect.origin.y); | |
| 122 extents->width = floatToHarfBuzzPosition(cgRect.size.width); | |
| 123 extents->height = floatToHarfBuzzPosition(cgRect.size.height); | |
| 124 return true; | |
| 125 } | |
| 126 | |
| 127 static hb_font_funcs_t* harfBuzzCoreTextGetFontFuncs() | |
| 128 { | |
| 129 static hb_font_funcs_t* harfBuzzCoreTextFontFuncs = 0; | |
| 130 | |
| 131 if (!harfBuzzCoreTextFontFuncs) { | |
| 132 harfBuzzCoreTextFontFuncs = hb_font_funcs_create(); | |
| 133 hb_font_funcs_set_glyph_func(harfBuzzCoreTextFontFuncs, getGlyph, 0, 0); | |
| 134 hb_font_funcs_set_glyph_h_advance_func(harfBuzzCoreTextFontFuncs, getGly
phHorizontalAdvance, 0, 0); | |
| 135 hb_font_funcs_set_glyph_h_origin_func(harfBuzzCoreTextFontFuncs, getGlyp
hHorizontalOrigin, 0, 0); | |
| 136 hb_font_funcs_set_glyph_extents_func(harfBuzzCoreTextFontFuncs, getGlyph
Extents, 0, 0); | |
| 137 hb_font_funcs_make_immutable(harfBuzzCoreTextFontFuncs); | |
| 138 } | |
| 139 return harfBuzzCoreTextFontFuncs; | |
| 140 } | |
| 141 | |
| 142 hb_face_t* HarfBuzzFace::createFace() | |
| 143 { | |
| 144 hb_face_t* face = hb_coretext_face_create(m_platformData->cgFont()); | |
| 145 ASSERT(face); | |
| 146 return face; | |
| 147 } | |
| 148 | |
| 149 hb_font_t* HarfBuzzFace::createFont() | |
| 150 { | |
| 151 hb_font_t* font = hb_font_create(m_face); | |
| 152 hb_font_set_funcs(font, harfBuzzCoreTextGetFontFuncs(), m_platformData, 0); | |
| 153 const float size = m_platformData->m_textSize; | |
| 154 hb_font_set_ppem(font, size, size); | |
| 155 const int scale = (1 << 16) * static_cast<int>(size); | |
| 156 hb_font_set_scale(font, scale, scale); | |
| 157 hb_font_make_immutable(font); | |
| 158 return font; | |
| 159 } | |
| 160 | |
| 161 } // namespace blink | |
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Chromium Code Reviews
Issue 618723003:
Revert of Switch to HarfBuzz on Mac and remove CoreText shaper (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master