| OLD | NEW |
| (Empty) |
| 1 /* | |
| 2 * Copyright (C) 2006, 2007, 2008, 2009 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 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "Font.h" | |
| 28 | |
| 29 #include "AffineTransform.h" | |
| 30 #include "FloatConversion.h" | |
| 31 #include "GlyphBuffer.h" | |
| 32 #include "GraphicsContext.h" | |
| 33 #include "IntRect.h" | |
| 34 #include "SimpleFontData.h" | |
| 35 #include "UniscribeController.h" | |
| 36 #include "WebCoreTextRenderer.h" | |
| 37 #include <ApplicationServices/ApplicationServices.h> | |
| 38 #include <WebKitSystemInterface/WebKitSystemInterface.h> | |
| 39 #include <wtf/MathExtras.h> | |
| 40 | |
| 41 namespace WebCore { | |
| 42 | |
| 43 const int syntheticObliqueAngle = 14; | |
| 44 | |
| 45 static inline CGFloat toCGFloat(FIXED f) | |
| 46 { | |
| 47 return f.value + f.fract / CGFloat(65536.0); | |
| 48 } | |
| 49 | |
| 50 static CGPathRef createPathForGlyph(HDC hdc, Glyph glyph) | |
| 51 { | |
| 52 CGMutablePathRef path = CGPathCreateMutable(); | |
| 53 | |
| 54 static const MAT2 identity = { 0, 1, 0, 0, 0, 0, 0, 1 }; | |
| 55 GLYPHMETRICS glyphMetrics; | |
| 56 // GGO_NATIVE matches the outline perfectly when Windows font smoothing is o
ff. | |
| 57 // GGO_NATIVE | GGO_UNHINTED does not match perfectly either when Windows fo
nt smoothing is on or off. | |
| 58 DWORD outlineLength = GetGlyphOutline(hdc, glyph, GGO_GLYPH_INDEX | GGO_NATI
VE, &glyphMetrics, 0, 0, &identity); | |
| 59 ASSERT(outlineLength >= 0); | |
| 60 if (outlineLength < 0) | |
| 61 return path; | |
| 62 | |
| 63 Vector<UInt8> outline(outlineLength); | |
| 64 GetGlyphOutline(hdc, glyph, GGO_GLYPH_INDEX | GGO_NATIVE, &glyphMetrics, out
lineLength, outline.data(), &identity); | |
| 65 | |
| 66 unsigned offset = 0; | |
| 67 while (offset < outlineLength) { | |
| 68 LPTTPOLYGONHEADER subpath = reinterpret_cast<LPTTPOLYGONHEADER>(outline.
data() + offset); | |
| 69 ASSERT(subpath->dwType == TT_POLYGON_TYPE); | |
| 70 if (subpath->dwType != TT_POLYGON_TYPE) | |
| 71 return path; | |
| 72 | |
| 73 CGPathMoveToPoint(path, 0, toCGFloat(subpath->pfxStart.x), toCGFloat(sub
path->pfxStart.y)); | |
| 74 | |
| 75 unsigned subpathOffset = sizeof(*subpath); | |
| 76 while (subpathOffset < subpath->cb) { | |
| 77 LPTTPOLYCURVE segment = reinterpret_cast<LPTTPOLYCURVE>(reinterpret_
cast<UInt8*>(subpath) + subpathOffset); | |
| 78 switch (segment->wType) { | |
| 79 case TT_PRIM_LINE: | |
| 80 for (unsigned i = 0; i < segment->cpfx; i++) | |
| 81 CGPathAddLineToPoint(path, 0, toCGFloat(segment->apfx[i]
.x), toCGFloat(segment->apfx[i].y)); | |
| 82 break; | |
| 83 | |
| 84 case TT_PRIM_QSPLINE: | |
| 85 for (unsigned i = 0; i < segment->cpfx; i++) { | |
| 86 CGFloat x = toCGFloat(segment->apfx[i].x); | |
| 87 CGFloat y = toCGFloat(segment->apfx[i].y); | |
| 88 CGFloat cpx; | |
| 89 CGFloat cpy; | |
| 90 | |
| 91 if (i == segment->cpfx - 2) { | |
| 92 cpx = toCGFloat(segment->apfx[i + 1].x); | |
| 93 cpy = toCGFloat(segment->apfx[i + 1].y); | |
| 94 i++; | |
| 95 } else { | |
| 96 cpx = (toCGFloat(segment->apfx[i].x) + toCGFloat(seg
ment->apfx[i + 1].x)) / 2; | |
| 97 cpy = (toCGFloat(segment->apfx[i].y) + toCGFloat(seg
ment->apfx[i + 1].y)) / 2; | |
| 98 } | |
| 99 | |
| 100 CGPathAddQuadCurveToPoint(path, 0, x, y, cpx, cpy); | |
| 101 } | |
| 102 break; | |
| 103 | |
| 104 case TT_PRIM_CSPLINE: | |
| 105 for (unsigned i = 0; i < segment->cpfx; i += 3) { | |
| 106 CGFloat cp1x = toCGFloat(segment->apfx[i].x); | |
| 107 CGFloat cp1y = toCGFloat(segment->apfx[i].y); | |
| 108 CGFloat cp2x = toCGFloat(segment->apfx[i + 1].x); | |
| 109 CGFloat cp2y = toCGFloat(segment->apfx[i + 1].y); | |
| 110 CGFloat x = toCGFloat(segment->apfx[i + 2].x); | |
| 111 CGFloat y = toCGFloat(segment->apfx[i + 2].y); | |
| 112 | |
| 113 CGPathAddCurveToPoint(path, 0, cp1x, cp1y, cp2x, cp2y, x
, y); | |
| 114 } | |
| 115 break; | |
| 116 | |
| 117 default: | |
| 118 ASSERT_NOT_REACHED(); | |
| 119 return path; | |
| 120 } | |
| 121 | |
| 122 subpathOffset += sizeof(*segment) + (segment->cpfx - 1) * sizeof(seg
ment->apfx[0]); | |
| 123 } | |
| 124 CGPathCloseSubpath(path); | |
| 125 offset += subpath->cb; | |
| 126 } | |
| 127 return path; | |
| 128 } | |
| 129 | |
| 130 void Font::drawGlyphs(GraphicsContext* graphicsContext, const SimpleFontData* fo
nt, const GlyphBuffer& glyphBuffer, | |
| 131 int from, int numGlyphs, const FloatPoint& point) const | |
| 132 { | |
| 133 CGContextRef cgContext = graphicsContext->platformContext(); | |
| 134 bool shouldUseFontSmoothing = WebCoreShouldUseFontSmoothing(); | |
| 135 | |
| 136 switch(fontDescription().fontSmoothing()) { | |
| 137 case Antialiased: { | |
| 138 graphicsContext->setShouldAntialias(true); | |
| 139 shouldUseFontSmoothing = false; | |
| 140 break; | |
| 141 } | |
| 142 case SubpixelAntialiased: { | |
| 143 graphicsContext->setShouldAntialias(true); | |
| 144 shouldUseFontSmoothing = true; | |
| 145 break; | |
| 146 } | |
| 147 case NoSmoothing: { | |
| 148 graphicsContext->setShouldAntialias(false); | |
| 149 shouldUseFontSmoothing = false; | |
| 150 break; | |
| 151 } | |
| 152 case AutoSmoothing: { | |
| 153 // For the AutoSmooth case, don't do anything! Keep the default settings
. | |
| 154 break; | |
| 155 } | |
| 156 default: | |
| 157 ASSERT_NOT_REACHED(); | |
| 158 } | |
| 159 | |
| 160 uint32_t oldFontSmoothingStyle = wkSetFontSmoothingStyle(cgContext, shouldUs
eFontSmoothing); | |
| 161 | |
| 162 const FontPlatformData& platformData = font->platformData(); | |
| 163 | |
| 164 CGContextSetFont(cgContext, platformData.cgFont()); | |
| 165 | |
| 166 CGAffineTransform matrix = CGAffineTransformIdentity; | |
| 167 matrix.b = -matrix.b; | |
| 168 matrix.d = -matrix.d; | |
| 169 | |
| 170 if (platformData.syntheticOblique()) { | |
| 171 static float skew = -tanf(syntheticObliqueAngle * piFloat / 180.0f); | |
| 172 matrix = CGAffineTransformConcat(matrix, CGAffineTransformMake(1, 0, ske
w, 1, 0, 0)); | |
| 173 } | |
| 174 | |
| 175 CGContextSetTextMatrix(cgContext, matrix); | |
| 176 | |
| 177 // Uniscribe gives us offsets to help refine the positioning of combining gl
yphs. | |
| 178 FloatSize translation = glyphBuffer.offsetAt(from); | |
| 179 | |
| 180 CGContextSetFontSize(cgContext, platformData.size()); | |
| 181 wkSetCGContextFontRenderingStyle(cgContext, font->isSystemFont(), false, fon
t->platformData().useGDI()); | |
| 182 | |
| 183 FloatSize shadowOffset; | |
| 184 float shadowBlur; | |
| 185 Color shadowColor; | |
| 186 ColorSpace shadowColorSpace; | |
| 187 graphicsContext->getShadow(shadowOffset, shadowBlur, shadowColor, shadowColo
rSpace); | |
| 188 | |
| 189 bool hasSimpleShadow = graphicsContext->textDrawingMode() == TextModeFill &&
shadowColor.isValid() && !shadowBlur && (!graphicsContext->shadowsIgnoreTransfo
rms() || graphicsContext->getCTM().isIdentityOrTranslationOrFlipped()); | |
| 190 if (hasSimpleShadow) { | |
| 191 // Paint simple shadows ourselves instead of relying on CG shadows, to a
void losing subpixel antialiasing. | |
| 192 graphicsContext->clearShadow(); | |
| 193 Color fillColor = graphicsContext->fillColor(); | |
| 194 Color shadowFillColor(shadowColor.red(), shadowColor.green(), shadowColo
r.blue(), shadowColor.alpha() * fillColor.alpha() / 255); | |
| 195 graphicsContext->setFillColor(shadowFillColor, ColorSpaceDeviceRGB); | |
| 196 float shadowTextX = point.x() + translation.width() + shadowOffset.width
(); | |
| 197 // If shadows are ignoring transforms, then we haven't applied the Y coo
rdinate flip yet, so down is negative. | |
| 198 float shadowTextY = point.y() + translation.height() + shadowOffset.heig
ht() * (graphicsContext->shadowsIgnoreTransforms() ? -1 : 1); | |
| 199 CGContextSetTextPosition(cgContext, shadowTextX, shadowTextY); | |
| 200 CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), sta
tic_cast<const CGSize*>(glyphBuffer.advances(from)), numGlyphs); | |
| 201 if (font->syntheticBoldOffset()) { | |
| 202 CGContextSetTextPosition(cgContext, point.x() + translation.width()
+ shadowOffset.width() + font->syntheticBoldOffset(), point.y() + translation.he
ight() + shadowOffset.height()); | |
| 203 CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from),
static_cast<const CGSize*>(glyphBuffer.advances(from)), numGlyphs); | |
| 204 } | |
| 205 graphicsContext->setFillColor(fillColor, ColorSpaceDeviceRGB); | |
| 206 } | |
| 207 | |
| 208 CGContextSetTextPosition(cgContext, point.x() + translation.width(), point.y
() + translation.height()); | |
| 209 CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), static_
cast<const CGSize*>(glyphBuffer.advances(from)), numGlyphs); | |
| 210 if (font->syntheticBoldOffset()) { | |
| 211 CGContextSetTextPosition(cgContext, point.x() + translation.width() + fo
nt->syntheticBoldOffset(), point.y() + translation.height()); | |
| 212 CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), sta
tic_cast<const CGSize*>(glyphBuffer.advances(from)), numGlyphs); | |
| 213 } | |
| 214 | |
| 215 if (hasSimpleShadow) | |
| 216 graphicsContext->setShadow(shadowOffset, shadowBlur, shadowColor, ColorS
paceDeviceRGB); | |
| 217 | |
| 218 wkRestoreFontSmoothingStyle(cgContext, oldFontSmoothingStyle); | |
| 219 } | |
| 220 | |
| 221 } | |
| OLD | NEW |