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| 1 /* | |
| 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. | |
| 3 * Copyright (C) 2012 Rik Cabanier (cabanier@adobe.com) | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 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 * | |
| 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 25 */ | |
| 26 | |
| 27 #include "config.h" | |
| 28 #include "core/platform/graphics/GraphicsTypes.h" | |
| 29 | |
| 30 #include "wtf/Assertions.h" | |
| 31 #include "wtf/text/WTFString.h" | |
| 32 | |
| 33 namespace WebCore { | |
| 34 | |
| 35 static const char* const compositeOperatorNames[] = { | |
| 36 "clear", | |
| 37 "copy", | |
| 38 "source-over", | |
| 39 "source-in", | |
| 40 "source-out", | |
| 41 "source-atop", | |
| 42 "destination-over", | |
| 43 "destination-in", | |
| 44 "destination-out", | |
| 45 "destination-atop", | |
| 46 "xor", | |
| 47 "darker", | |
| 48 "lighter" | |
| 49 }; | |
| 50 | |
| 51 static const char* const blendOperatorNames[] = { | |
| 52 "multiply", | |
| 53 "screen", | |
| 54 "overlay", | |
| 55 "darken", | |
| 56 "lighten", | |
| 57 "color-dodge", | |
| 58 "color-burn", | |
| 59 "hard-light", | |
| 60 "soft-light", | |
| 61 "difference", | |
| 62 "exclusion", | |
| 63 "hue", | |
| 64 "saturation", | |
| 65 "color", | |
| 66 "luminosity" | |
| 67 }; | |
| 68 const int numCompositeOperatorNames = WTF_ARRAY_LENGTH(compositeOperatorNames); | |
| 69 const int numBlendOperatorNames = WTF_ARRAY_LENGTH(blendOperatorNames); | |
| 70 | |
| 71 bool parseCompositeAndBlendOperator(const String& s, CompositeOperator& op, Blen
dMode& blendOp) | |
| 72 { | |
| 73 for (int i = 0; i < numCompositeOperatorNames; i++) { | |
| 74 if (s == compositeOperatorNames[i]) { | |
| 75 op = static_cast<CompositeOperator>(i); | |
| 76 blendOp = BlendModeNormal; | |
| 77 return true; | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 for (int i = 0; i < numBlendOperatorNames; i++) { | |
| 82 if (s == blendOperatorNames[i]) { | |
| 83 blendOp = static_cast<BlendMode>(i+1); | |
| 84 // For now, blending will always assume source-over. This will be fi
xed in the future | |
| 85 op = CompositeSourceOver; | |
| 86 return true; | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 return false; | |
| 91 } | |
| 92 | |
| 93 // FIXME: when we support blend modes in combination with compositing other than
source-over | |
| 94 // this routine needs to be updated. | |
| 95 String compositeOperatorName(CompositeOperator op, BlendMode blendOp) | |
| 96 { | |
| 97 ASSERT(op >= 0); | |
| 98 ASSERT(op < numCompositeOperatorNames); | |
| 99 ASSERT(blendOp >= 0); | |
| 100 ASSERT(blendOp <= numBlendOperatorNames); | |
| 101 if (blendOp != BlendModeNormal) | |
| 102 return blendOperatorNames[blendOp-1]; | |
| 103 return compositeOperatorNames[op]; | |
| 104 } | |
| 105 | |
| 106 bool parseLineCap(const String& s, LineCap& cap) | |
| 107 { | |
| 108 if (s == "butt") { | |
| 109 cap = ButtCap; | |
| 110 return true; | |
| 111 } | |
| 112 if (s == "round") { | |
| 113 cap = RoundCap; | |
| 114 return true; | |
| 115 } | |
| 116 if (s == "square") { | |
| 117 cap = SquareCap; | |
| 118 return true; | |
| 119 } | |
| 120 return false; | |
| 121 } | |
| 122 | |
| 123 String lineCapName(LineCap cap) | |
| 124 { | |
| 125 ASSERT(cap >= 0); | |
| 126 ASSERT(cap < 3); | |
| 127 const char* const names[3] = { "butt", "round", "square" }; | |
| 128 return names[cap]; | |
| 129 } | |
| 130 | |
| 131 bool parseLineJoin(const String& s, LineJoin& join) | |
| 132 { | |
| 133 if (s == "miter") { | |
| 134 join = MiterJoin; | |
| 135 return true; | |
| 136 } | |
| 137 if (s == "round") { | |
| 138 join = RoundJoin; | |
| 139 return true; | |
| 140 } | |
| 141 if (s == "bevel") { | |
| 142 join = BevelJoin; | |
| 143 return true; | |
| 144 } | |
| 145 return false; | |
| 146 } | |
| 147 | |
| 148 String lineJoinName(LineJoin join) | |
| 149 { | |
| 150 ASSERT(join >= 0); | |
| 151 ASSERT(join < 3); | |
| 152 const char* const names[3] = { "miter", "round", "bevel" }; | |
| 153 return names[join]; | |
| 154 } | |
| 155 | |
| 156 String textAlignName(TextAlign align) | |
| 157 { | |
| 158 ASSERT(align >= 0); | |
| 159 ASSERT(align < 5); | |
| 160 const char* const names[5] = { "start", "end", "left", "center", "right" }; | |
| 161 return names[align]; | |
| 162 } | |
| 163 | |
| 164 bool parseTextAlign(const String& s, TextAlign& align) | |
| 165 { | |
| 166 if (s == "start") { | |
| 167 align = StartTextAlign; | |
| 168 return true; | |
| 169 } | |
| 170 if (s == "end") { | |
| 171 align = EndTextAlign; | |
| 172 return true; | |
| 173 } | |
| 174 if (s == "left") { | |
| 175 align = LeftTextAlign; | |
| 176 return true; | |
| 177 } | |
| 178 if (s == "center") { | |
| 179 align = CenterTextAlign; | |
| 180 return true; | |
| 181 } | |
| 182 if (s == "right") { | |
| 183 align = RightTextAlign; | |
| 184 return true; | |
| 185 } | |
| 186 return false; | |
| 187 } | |
| 188 | |
| 189 String textBaselineName(TextBaseline baseline) | |
| 190 { | |
| 191 ASSERT(baseline >= 0); | |
| 192 ASSERT(baseline < 6); | |
| 193 const char* const names[6] = { "alphabetic", "top", "middle", "bottom", "ide
ographic", "hanging" }; | |
| 194 return names[baseline]; | |
| 195 } | |
| 196 | |
| 197 bool parseTextBaseline(const String& s, TextBaseline& baseline) | |
| 198 { | |
| 199 if (s == "alphabetic") { | |
| 200 baseline = AlphabeticTextBaseline; | |
| 201 return true; | |
| 202 } | |
| 203 if (s == "top") { | |
| 204 baseline = TopTextBaseline; | |
| 205 return true; | |
| 206 } | |
| 207 if (s == "middle") { | |
| 208 baseline = MiddleTextBaseline; | |
| 209 return true; | |
| 210 } | |
| 211 if (s == "bottom") { | |
| 212 baseline = BottomTextBaseline; | |
| 213 return true; | |
| 214 } | |
| 215 if (s == "ideographic") { | |
| 216 baseline = IdeographicTextBaseline; | |
| 217 return true; | |
| 218 } | |
| 219 if (s == "hanging") { | |
| 220 baseline = HangingTextBaseline; | |
| 221 return true; | |
| 222 } | |
| 223 return false; | |
| 224 } | |
| 225 | |
| 226 } | |
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