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comparison: gfx/skia/trunk/src/svg/SkSVGPaintState.cpp
gfx/skia/trunk/src/svg/SkSVGPaintState.cpp
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| 1 | |
| 2 /* | |
| 3 * Copyright 2006 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #include "SkSVGPaintState.h" | |
| 11 #include "SkSVGElements.h" | |
| 12 #include "SkSVGParser.h" | |
| 13 #include "SkParse.h" | |
| 14 | |
| 15 SkSVGAttribute SkSVGPaint::gAttributes[] = { | |
| 16 SVG_LITERAL_ATTRIBUTE(clip-path, f_clipPath), | |
| 17 SVG_LITERAL_ATTRIBUTE(clip-rule, f_clipRule), | |
| 18 SVG_LITERAL_ATTRIBUTE(enable-background, f_enableBackground), | |
| 19 SVG_ATTRIBUTE(fill), | |
| 20 SVG_LITERAL_ATTRIBUTE(fill-rule, f_fillRule), | |
| 21 SVG_ATTRIBUTE(filter), | |
| 22 SVG_LITERAL_ATTRIBUTE(font-family, f_fontFamily), | |
| 23 SVG_LITERAL_ATTRIBUTE(font-size, f_fontSize), | |
| 24 SVG_LITERAL_ATTRIBUTE(letter-spacing, f_letterSpacing), | |
| 25 SVG_ATTRIBUTE(mask), | |
| 26 SVG_ATTRIBUTE(opacity), | |
| 27 SVG_LITERAL_ATTRIBUTE(stop-color, f_stopColor), | |
| 28 SVG_LITERAL_ATTRIBUTE(stop-opacity, f_stopOpacity), | |
| 29 SVG_ATTRIBUTE(stroke), | |
| 30 SVG_LITERAL_ATTRIBUTE(stroke-dasharray, f_strokeDasharray), | |
| 31 SVG_LITERAL_ATTRIBUTE(stroke-linecap, f_strokeLinecap), | |
| 32 SVG_LITERAL_ATTRIBUTE(stroke-linejoin, f_strokeLinejoin), | |
| 33 SVG_LITERAL_ATTRIBUTE(stroke-miterlimit, f_strokeMiterlimit), | |
| 34 SVG_LITERAL_ATTRIBUTE(stroke-width, f_strokeWidth), | |
| 35 SVG_ATTRIBUTE(style), | |
| 36 SVG_ATTRIBUTE(transform) | |
| 37 }; | |
| 38 | |
| 39 const int SkSVGPaint::kAttributesSize = SK_ARRAY_COUNT(SkSVGPaint::gAttributes); | |
| 40 | |
| 41 SkSVGPaint::SkSVGPaint() : fNext(NULL) { | |
| 42 } | |
| 43 | |
| 44 SkString* SkSVGPaint::operator[](int index) { | |
| 45 SkASSERT(index >= 0); | |
| 46 SkASSERT(index < &fTerminal - &fInitial); | |
| 47 SkASSERT(&fTerminal - &fInitial == kTerminal - kInitial); | |
| 48 SkString* result = &fInitial + index + 1; | |
| 49 return result; | |
| 50 } | |
| 51 | |
| 52 void SkSVGPaint::addAttribute(SkSVGParser& parser, int attrIndex, | |
| 53 const char* attrValue, size_t attrLength) { | |
| 54 SkString* attr = (*this)[attrIndex]; | |
| 55 switch(attrIndex) { | |
| 56 case kClipPath: | |
| 57 case kClipRule: | |
| 58 case kEnableBackground: | |
| 59 case kFill: | |
| 60 case kFillRule: | |
| 61 case kFilter: | |
| 62 case kFontFamily: | |
| 63 case kFontSize: | |
| 64 case kLetterSpacing: | |
| 65 case kMask: | |
| 66 case kOpacity: | |
| 67 case kStopColor: | |
| 68 case kStopOpacity: | |
| 69 case kStroke: | |
| 70 case kStroke_Dasharray: | |
| 71 case kStroke_Linecap: | |
| 72 case kStroke_Linejoin: | |
| 73 case kStroke_Miterlimit: | |
| 74 case kStroke_Width: | |
| 75 case kTransform: | |
| 76 attr->set(attrValue, attrLength); | |
| 77 return; | |
| 78 case kStyle: { | |
| 79 // iterate through colon / semi-colon delimited pairs | |
| 80 int pairs = SkParse::Count(attrValue, ';'); | |
| 81 const char* attrEnd = attrValue + attrLength; | |
| 82 do { | |
| 83 const char* end = strchr(attrValue, ';'); | |
| 84 if (end == NULL) | |
| 85 end = attrEnd; | |
| 86 const char* delimiter = strchr(attrValue, ':'); | |
| 87 SkASSERT(delimiter != 0 && delimiter < end); | |
| 88 int index = parser.findAttribute(this, attrValue, (int) (delimiter - attrValue), true); | |
| 89 SkASSERT(index >= 0); | |
| 90 delimiter++; | |
| 91 addAttribute(parser, index, delimiter, (int) (end - delimiter)); | |
| 92 attrValue = end + 1; | |
| 93 } while (--pairs); | |
| 94 return; | |
| 95 } | |
| 96 default: | |
| 97 SkASSERT(0); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 bool SkSVGPaint::flush(SkSVGParser& parser, bool isFlushable, bool isDef) { | |
| 102 SkSVGPaint current; | |
| 103 SkSVGPaint* walking = parser.fHead; | |
| 104 int index; | |
| 105 while (walking != NULL) { | |
| 106 for (index = kInitial + 1; index < kTerminal; index++) { | |
| 107 SkString* lastAttr = (*walking)[index]; | |
| 108 if (lastAttr->size() == 0) | |
| 109 continue; | |
| 110 if (current[index]->size() > 0) | |
| 111 continue; | |
| 112 current[index]->set(*lastAttr); | |
| 113 } | |
| 114 walking = walking->fNext; | |
| 115 } | |
| 116 bool paintChanged = false; | |
| 117 SkSVGPaint& lastState = parser.fLastFlush; | |
| 118 if (isFlushable == false) { | |
| 119 if (isDef == true) { | |
| 120 if (current.f_mask.size() > 0 && current.f_mask.equals(lastState.f_mask) == false) { | |
| 121 SkSVGElement* found; | |
| 122 const char* idStart = strchr(current.f_mask.c_str(), '#'); | |
| 123 SkASSERT(idStart); | |
| 124 SkString id(idStart + 1, strlen(idStart) - 2); | |
| 125 bool itsFound = parser.fIDs.find(id.c_str(), &found); | |
| 126 SkASSERT(itsFound); | |
| 127 SkSVGElement* gradient = found->getGradient(); | |
| 128 if (gradient) { | |
| 129 gradient->write(parser, current.f_fill); | |
| 130 gradient->write(parser, current.f_stroke); | |
| 131 } | |
| 132 } | |
| 133 } | |
| 134 goto setLast; | |
| 135 } | |
| 136 { | |
| 137 bool changed[kTerminal]; | |
| 138 memset(changed, 0, sizeof(changed)); | |
| 139 for (index = kInitial + 1; index < kTerminal; index++) { | |
| 140 if (index == kTransform || index == kClipPath || index == kStopColor || index == kStopOpacity || | |
| 141 index == kClipRule || index == kFillRule) | |
| 142 continue; | |
| 143 SkString* lastAttr = lastState[index]; | |
| 144 SkString* currentAttr = current[index]; | |
| 145 paintChanged |= changed[index] = lastAttr->equals(*currentAttr) == false; | |
| 146 } | |
| 147 if (paintChanged) { | |
| 148 if (current.f_mask.size() > 0) { | |
| 149 if (current.f_fill.equals("none") == false && strncmp(current.f_fill.c_str(), "url(#", 5) != 0) { | |
| 150 SkASSERT(current.f_fill.c_str()[0] == '#'); | |
| 151 SkString replacement("url(#mask"); | |
| 152 replacement.append(current.f_fill.c_str() + 1); | |
| 153 replacement.appendUnichar(')'); | |
| 154 current.f_fill.set(replacement); | |
| 155 } | |
| 156 if (current.f_stroke.equals("none") == false && strncmp(current.f_stroke.c_str(), "url(#", 5) != 0) { | |
| 157 SkASSERT(current.f_stroke.c_str()[0] == '#'); | |
| 158 SkString replacement("url(#mask"); | |
| 159 replacement.append(current.f_stroke.c_str() + 1); | |
| 160 replacement.appendUnichar(')'); | |
| 161 current.f_stroke.set(replacement); | |
| 162 } | |
| 163 } | |
| 164 if (current.f_fill.equals("none") && current.f_stroke.equals("none")) | |
| 165 current.f_opacity.set("0"); | |
| 166 if (parser.fSuppressPaint == false) { | |
| 167 parser._startElement("paint"); | |
| 168 bool success = writeChangedAttributes(parser, current, changed); | |
| 169 if (success == false) | |
| 170 return paintChanged; | |
| 171 success = writeChangedElements(parser, current, changed); | |
| 172 if (success == false) | |
| 173 return paintChanged; | |
| 174 parser._endElement(); // paint | |
| 175 } | |
| 176 } | |
| 177 } | |
| 178 setLast: | |
| 179 for (index = kInitial + 1; index < kTerminal; index++) { | |
| 180 SkString* lastAttr = lastState[index]; | |
| 181 SkString* currentAttr = current[index]; | |
| 182 lastAttr->set(*currentAttr); | |
| 183 } | |
| 184 return paintChanged; | |
| 185 } | |
| 186 | |
| 187 int SkSVGPaint::getAttributes(const SkSVGAttribute** attrPtr) { | |
| 188 *attrPtr = gAttributes; | |
| 189 return kAttributesSize; | |
| 190 } | |
| 191 | |
| 192 void SkSVGPaint::setSave(SkSVGParser& parser) { | |
| 193 SkTDArray<SkString*> clips; | |
| 194 SkSVGPaint* walking = parser.fHead; | |
| 195 int index; | |
| 196 SkMatrix sum; | |
| 197 sum.reset(); | |
| 198 while (walking != NULL) { | |
| 199 for (index = kInitial + 1; index < kTerminal; index++) { | |
| 200 SkString* lastAttr = (*walking)[index]; | |
| 201 if (lastAttr->size() == 0) | |
| 202 continue; | |
| 203 if (index == kTransform) { | |
| 204 const char* str = lastAttr->c_str(); | |
| 205 SkASSERT(strncmp(str, "matrix(", 7) == 0); | |
| 206 str += 6; | |
| 207 const char* strEnd = strrchr(str, ')'); | |
| 208 SkASSERT(strEnd != NULL); | |
| 209 SkString mat(str, strEnd - str); | |
| 210 SkSVGParser::ConvertToArray(mat); | |
| 211 SkScalar values[6]; | |
| 212 SkParse::FindScalars(mat.c_str() + 1, values, 6); | |
| 213 SkMatrix matrix; | |
| 214 matrix.reset(); | |
| 215 matrix.setScaleX(values[0]); | |
| 216 matrix.setSkewY(values[1]); | |
| 217 matrix.setSkewX(values[2]); | |
| 218 matrix.setScaleY(values[3]); | |
| 219 matrix.setTranslateX(values[4]); | |
| 220 matrix.setTranslateY(values[5]); | |
| 221 sum.setConcat(matrix, sum); | |
| 222 continue; | |
| 223 } | |
| 224 if ( index == kClipPath) | |
| 225 *clips.insert(0) = lastAttr; | |
| 226 } | |
| 227 walking = walking->fNext; | |
| 228 } | |
| 229 if ((sum == parser.fLastTransform) == false) { | |
| 230 SkMatrix inverse; | |
| 231 bool success = parser.fLastTransform.invert(&inverse); | |
| 232 SkASSERT(success == true); | |
| 233 SkMatrix output; | |
| 234 output.setConcat(inverse, sum); | |
| 235 parser.fLastTransform = sum; | |
| 236 SkString outputStr; | |
| 237 outputStr.appendUnichar('['); | |
| 238 outputStr.appendScalar(output.getScaleX()); | |
| 239 outputStr.appendUnichar(','); | |
| 240 outputStr.appendScalar(output.getSkewX()); | |
| 241 outputStr.appendUnichar(','); | |
| 242 outputStr.appendScalar(output.getTranslateX()); | |
| 243 outputStr.appendUnichar(','); | |
| 244 outputStr.appendScalar(output.getSkewY()); | |
| 245 outputStr.appendUnichar(','); | |
| 246 outputStr.appendScalar(output.getScaleY()); | |
| 247 outputStr.appendUnichar(','); | |
| 248 outputStr.appendScalar(output.getTranslateY()); | |
| 249 outputStr.appendUnichar(','); | |
| 250 outputStr.appendScalar(output.getPerspX()); | |
| 251 outputStr.appendUnichar(','); | |
| 252 outputStr.appendScalar(output.getPerspY()); | |
| 253 outputStr.append(",1]"); | |
| 254 parser._startElement("matrix"); | |
| 255 parser._addAttributeLen("matrix", outputStr.c_str(), outputStr.size()); | |
| 256 parser._endElement(); | |
| 257 } | |
| 258 #if 0 // incomplete | |
| 259 if (parser.fTransformClips.size() > 0) { | |
| 260 // need to reset the clip when the 'g' scope is ended | |
| 261 parser._startElement("add"); | |
| 262 const char* start = strchr(current->f_clipPath.c_str(), '#') + 1; | |
| 263 SkASSERT(start); | |
| 264 parser._addAttributeLen("use", start, strlen(start) - 1); | |
| 265 parser._endElement(); // clip | |
| 266 } | |
| 267 #endif | |
| 268 } | |
| 269 | |
| 270 bool SkSVGPaint::writeChangedAttributes(SkSVGParser& parser, | |
| 271 SkSVGPaint& current, bool* changed) { | |
| 272 SkSVGPaint& lastState = parser.fLastFlush; | |
| 273 for (int index = kInitial + 1; index < kTerminal; index++) { | |
| 274 if (changed[index] == false) | |
| 275 continue; | |
| 276 SkString* topAttr = current[index]; | |
| 277 size_t attrLength = topAttr->size(); | |
| 278 if (attrLength == 0) | |
| 279 continue; | |
| 280 const char* attrValue = topAttr->c_str(); | |
| 281 SkString* lastAttr = lastState[index]; | |
| 282 switch(index) { | |
| 283 case kClipPath: | |
| 284 case kClipRule: | |
| 285 case kEnableBackground: | |
| 286 break; | |
| 287 case kFill: | |
| 288 if (topAttr->equals("none") == false && lastAttr->equals("none") == true) | |
| 289 parser._addAttribute("stroke", "false"); | |
| 290 goto fillStrokeAttrCommon; | |
| 291 case kFillRule: | |
| 292 case kFilter: | |
| 293 case kFontFamily: | |
| 294 break; | |
| 295 case kFontSize: | |
| 296 parser._addAttributeLen("textSize", attrValue, attrLength); | |
| 297 break; | |
| 298 case kLetterSpacing: | |
| 299 parser._addAttributeLen("textTracking", attrValue, attrLength); | |
| 300 break; | |
| 301 case kMask: | |
| 302 break; | |
| 303 case kOpacity: | |
| 304 break; | |
| 305 case kStopColor: | |
| 306 break; | |
| 307 case kStopOpacity: | |
| 308 break; | |
| 309 case kStroke: | |
| 310 if (topAttr->equals("none") == false && lastAttr->equals("none") == true) | |
| 311 parser._addAttribute("stroke", "true"); | |
| 312 fillStrokeAttrCommon: | |
| 313 if (strncmp(attrValue, "url(", 4) == 0) { | |
| 314 SkASSERT(attrValue[4] == '#'); | |
| 315 const char* idStart = attrValue + 5; | |
| 316 const char* idEnd = strrchr(attrValue, ')'); | |
| 317 SkASSERT(idStart < idEnd); | |
| 318 SkString id(idStart, idEnd - idStart); | |
| 319 SkSVGElement* found; | |
| 320 if (strncmp(id.c_str(), "mask", 4) != 0) { | |
| 321 bool itsFound = parser.fIDs.find(id.c_str(), &found); | |
| 322 SkASSERT(itsFound); | |
| 323 SkASSERT(found->getType() == SkSVGType_LinearGradient || | |
| 324 found->getType() == SkSVGType_RadialGradient); | |
| 325 } | |
| 326 parser._addAttribute("shader", id.c_str()); | |
| 327 } | |
| 328 break; | |
| 329 case kStroke_Dasharray: | |
| 330 break; | |
| 331 case kStroke_Linecap: | |
| 332 parser._addAttributeLen("strokeCap", attrValue, attrLength); | |
| 333 break; | |
| 334 case kStroke_Linejoin: | |
| 335 parser._addAttributeLen("strokeJoin", attrValue, attrLength); | |
| 336 break; | |
| 337 case kStroke_Miterlimit: | |
| 338 parser._addAttributeLen("strokeMiter", attrValue, attrLength); | |
| 339 break; | |
| 340 case kStroke_Width: | |
| 341 parser._addAttributeLen("strokeWidth", attrValue, attrLength); | |
| 342 case kStyle: | |
| 343 case kTransform: | |
| 344 break; | |
| 345 default: | |
| 346 SkASSERT(0); | |
| 347 return false; | |
| 348 } | |
| 349 } | |
| 350 return true; | |
| 351 } | |
| 352 | |
| 353 bool SkSVGPaint::writeChangedElements(SkSVGParser& parser, | |
| 354 SkSVGPaint& current, bool* changed) { | |
| 355 SkSVGPaint& lastState = parser.fLastFlush; | |
| 356 for (int index = kInitial + 1; index < kTerminal; index++) { | |
| 357 SkString* topAttr = current[index]; | |
| 358 size_t attrLength = topAttr->size(); | |
| 359 if (attrLength == 0) | |
| 360 continue; | |
| 361 const char* attrValue = topAttr->c_str(); | |
| 362 SkString* lastAttr = lastState[index]; | |
| 363 switch(index) { | |
| 364 case kClipPath: | |
| 365 case kClipRule: | |
| 366 // !!! need to add this outside of paint | |
| 367 break; | |
| 368 case kEnableBackground: | |
| 369 // !!! don't know what to do with this | |
| 370 break; | |
| 371 case kFill: | |
| 372 goto addColor; | |
| 373 case kFillRule: | |
| 374 case kFilter: | |
| 375 break; | |
| 376 case kFontFamily: | |
| 377 parser._startElement("typeface"); | |
| 378 parser._addAttributeLen("fontName", attrValue, attrLength); | |
| 379 parser._endElement(); // typeface | |
| 380 break; | |
| 381 case kFontSize: | |
| 382 case kLetterSpacing: | |
| 383 break; | |
| 384 case kMask: | |
| 385 case kOpacity: | |
| 386 if (changed[kStroke] == false && changed[kFill] == false) { | |
| 387 parser._startElement("color"); | |
| 388 SkString& opacity = current.f_opacity; | |
| 389 parser._addAttributeLen("color", parser.fLastColor.c_str(), parser.fLastColor.size()); | |
| 390 parser._addAttributeLen("alpha", opacity.c_str(), opacity.size()); | |
| 391 parser._endElement(); // color | |
| 392 } | |
| 393 break; | |
| 394 case kStopColor: | |
| 395 break; | |
| 396 case kStopOpacity: | |
| 397 break; | |
| 398 case kStroke: | |
| 399 addColor: | |
| 400 if (strncmp(lastAttr->c_str(), "url(", 4) == 0 && strncmp(attrValue, "url(", 4) != 0) { | |
| 401 parser._startElement("shader"); | |
| 402 parser._endElement(); | |
| 403 } | |
| 404 if (topAttr->equals(*lastAttr)) | |
| 405 continue; | |
| 406 { | |
| 407 bool urlRef = strncmp(attrValue, "url(", 4) == 0; | |
| 408 bool colorNone = strcmp(attrValue, "none") == 0; | |
| 409 bool lastEqual = parser.fLastColor.equals(attrValue, attrLength); | |
| 410 bool newColor = urlRef == false && colorNone == false && lastEqual == false; | |
| 411 if (newColor || changed[kOpacity]) { | |
| 412 parser._startElement("color"); | |
| 413 if (newColor || changed[kOpacity]) { | |
| 414 parser._addAttributeLen("color", attrValue, attrLength); | |
| 415 parser.fLastColor.set(attrValue, attrLength); | |
| 416 } | |
| 417 if (changed[kOpacity]) { | |
| 418 SkString& opacity = current.f_opacity; | |
| 419 parser._addAttributeLen("alpha", opacity.c_str(), opacity.size()); | |
| 420 } | |
| 421 parser._endElement(); // color | |
| 422 } | |
| 423 } | |
| 424 break; | |
| 425 case kStroke_Dasharray: | |
| 426 parser._startElement("dash"); | |
| 427 SkSVGParser::ConvertToArray(*topAttr); | |
| 428 parser._addAttribute("intervals", topAttr->c_str()); | |
| 429 parser._endElement(); // dash | |
| 430 break; | |
| 431 case kStroke_Linecap: | |
| 432 case kStroke_Linejoin: | |
| 433 case kStroke_Miterlimit: | |
| 434 case kStroke_Width: | |
| 435 case kStyle: | |
| 436 case kTransform: | |
| 437 break; | |
| 438 default: | |
| 439 SkASSERT(0); | |
| 440 return false; | |
| 441 } | |
| 442 } | |
| 443 return true; | |
| 444 } | |
| 445 | |
| 446 void SkSVGPaint::Push(SkSVGPaint** head, SkSVGPaint* newRecord) { | |
| 447 newRecord->fNext = *head; | |
| 448 *head = newRecord; | |
| 449 } | |
| 450 | |
| 451 void SkSVGPaint::Pop(SkSVGPaint** head) { | |
| 452 SkSVGPaint* next = (*head)->fNext; | |
| 453 *head = next; | |
| 454 } |
