1 /* 2 * Copyright (C) 2006 Eric Seidel <eric (at) webkit.org> 3 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved. 4 * Copyright (C) Research In Motion Limited 2011. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "config.h" 29 30 #include "core/svg/graphics/SVGImage.h" 31 32 #include "core/dom/NodeTraversal.h" 33 #include "core/dom/shadow/ComposedTreeWalker.h" 34 #include "core/loader/DocumentLoader.h" 35 #include "core/page/Chrome.h" 36 #include "core/frame/Frame.h" 37 #include "core/frame/FrameView.h" 38 #include "core/frame/Settings.h" 39 #include "core/rendering/style/RenderStyle.h" 40 #include "core/rendering/svg/RenderSVGRoot.h" 41 #include "core/svg/SVGDocument.h" 42 #include "core/svg/SVGFEImageElement.h" 43 #include "core/svg/SVGImageElement.h" 44 #include "core/svg/SVGSVGElement.h" 45 #include "core/svg/graphics/SVGImageChromeClient.h" 46 #include "platform/LengthFunctions.h" 47 #include "platform/geometry/IntRect.h" 48 #include "platform/graphics/GraphicsContextStateSaver.h" 49 #include "platform/graphics/ImageBuffer.h" 50 #include "platform/graphics/ImageObserver.h" 51 #include "wtf/PassRefPtr.h" 52 53 namespace WebCore { 54 55 SVGImage::SVGImage(ImageObserver* observer) 56 : Image(observer) 57 { 58 } 59 60 SVGImage::~SVGImage() 61 { 62 if (m_page) { 63 // Store m_page in a local variable, clearing m_page, so that SVGImageChromeClient knows we're destructed. 64 OwnPtr<Page> currentPage = m_page.release(); 65 currentPage->mainFrame()->loader().frameDetached(); // Break both the loader and view references to the frame 66 } 67 68 // Verify that page teardown destroyed the Chrome 69 ASSERT(!m_chromeClient || !m_chromeClient->image()); 70 } 71 72 bool SVGImage::isInSVGImage(const Element* element) 73 { 74 ASSERT(element); 75 76 Page* page = element->document().page(); 77 if (!page) 78 return false; 79 80 return page->chrome().client().isSVGImageChromeClient(); 81 } 82 83 bool SVGImage::currentFrameHasSingleSecurityOrigin() const 84 { 85 if (!m_page) 86 return true; 87 88 Frame* frame = m_page->mainFrame(); 89 90 RELEASE_ASSERT(frame->document()->loadEventFinished()); 91 92 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 93 if (!rootElement) 94 return true; 95 96 // Don't allow foreignObject elements or images that are not known to be 97 // single-origin since these can leak cross-origin information. 98 ComposedTreeWalker walker(rootElement); 99 while (Node* node = walker.get()) { 100 if (node->hasTagName(SVGNames::foreignObjectTag)) 101 return false; 102 if (node->hasTagName(SVGNames::imageTag)) 103 return toSVGImageElement(node)->currentFrameHasSingleSecurityOrigin(); 104 if (node->hasTagName(SVGNames::feImageTag)) 105 return toSVGFEImageElement(node)->currentFrameHasSingleSecurityOrigin(); 106 walker.next(); 107 } 108 109 // Because SVG image rendering disallows external resources and links, these 110 // images effectively are restricted to a single security origin. 111 return true; 112 } 113 114 void SVGImage::setContainerSize(const IntSize& size) 115 { 116 if (!m_page || !usesContainerSize()) 117 return; 118 119 Frame* frame = m_page->mainFrame(); 120 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 121 if (!rootElement) 122 return; 123 124 FrameView* view = frameView(); 125 view->resize(this->containerSize()); 126 127 RenderSVGRoot* renderer = toRenderSVGRoot(rootElement->renderer()); 128 if (!renderer) 129 return; 130 renderer->setContainerSize(size); 131 } 132 133 IntSize SVGImage::containerSize() const 134 { 135 if (!m_page) 136 return IntSize(); 137 Frame* frame = m_page->mainFrame(); 138 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 139 if (!rootElement) 140 return IntSize(); 141 142 RenderSVGRoot* renderer = toRenderSVGRoot(rootElement->renderer()); 143 if (!renderer) 144 return IntSize(); 145 146 // If a container size is available it has precedence. 147 IntSize containerSize = renderer->containerSize(); 148 if (!containerSize.isEmpty()) 149 return containerSize; 150 151 // Assure that a container size is always given for a non-identity zoom level. 152 ASSERT(renderer->style()->effectiveZoom() == 1); 153 154 FloatSize currentSize; 155 if (rootElement->intrinsicWidth().isFixed() && rootElement->intrinsicHeight().isFixed()) 156 currentSize = rootElement->currentViewportSize(); 157 else 158 currentSize = rootElement->currentViewBoxRect().size(); 159 160 if (!currentSize.isEmpty()) 161 return IntSize(static_cast<int>(ceilf(currentSize.width())), static_cast<int>(ceilf(currentSize.height()))); 162 163 // As last resort, use CSS default intrinsic size. 164 return IntSize(300, 150); 165 } 166 167 void SVGImage::drawForContainer(GraphicsContext* context, const FloatSize containerSize, float zoom, const FloatRect& dstRect, 168 const FloatRect& srcRect, CompositeOperator compositeOp, blink::WebBlendMode blendMode) 169 { 170 if (!m_page) 171 return; 172 173 // Temporarily disable the image observer to prevent changeInRect() calls due re-laying out the image. 174 ImageObserverDisabler imageObserverDisabler(this); 175 176 IntSize roundedContainerSize = roundedIntSize(containerSize); 177 setContainerSize(roundedContainerSize); 178 179 FloatRect scaledSrc = srcRect; 180 scaledSrc.scale(1 / zoom); 181 182 // Compensate for the container size rounding by adjusting the source rect. 183 FloatSize adjustedSrcSize = scaledSrc.size(); 184 adjustedSrcSize.scale(roundedContainerSize.width() / containerSize.width(), roundedContainerSize.height() / containerSize.height()); 185 scaledSrc.setSize(adjustedSrcSize); 186 187 draw(context, dstRect, scaledSrc, compositeOp, blendMode); 188 } 189 190 PassRefPtr<NativeImageSkia> SVGImage::nativeImageForCurrentFrame() 191 { 192 if (!m_page) 193 return 0; 194 195 OwnPtr<ImageBuffer> buffer = ImageBuffer::create(size()); 196 if (!buffer) 197 return 0; 198 199 drawForContainer(buffer->context(), size(), 1, rect(), rect(), CompositeSourceOver, blink::WebBlendModeNormal); 200 201 // FIXME: WK(Bug 113657): We should use DontCopyBackingStore here. 202 return buffer->copyImage(CopyBackingStore)->nativeImageForCurrentFrame(); 203 } 204 205 void SVGImage::drawPatternForContainer(GraphicsContext* context, const FloatSize containerSize, float zoom, const FloatRect& srcRect, 206 const FloatSize& scale, const FloatPoint& phase, CompositeOperator compositeOp, const FloatRect& dstRect, blink::WebBlendMode blendMode, const IntSize& repeatSpacing) 207 { 208 FloatRect zoomedContainerRect = FloatRect(FloatPoint(), containerSize); 209 zoomedContainerRect.scale(zoom); 210 211 // The ImageBuffer size needs to be scaled to match the final resolution. 212 // FIXME: No need to get the full CTM here, we just need the scale. 213 AffineTransform transform = context->getCTM(); 214 FloatSize imageBufferScale = FloatSize(transform.xScale(), transform.yScale()); 215 ASSERT(imageBufferScale.width()); 216 ASSERT(imageBufferScale.height()); 217 218 FloatSize scaleWithoutCTM(scale.width() / imageBufferScale.width(), scale.height() / imageBufferScale.height()); 219 220 FloatRect imageBufferSize = zoomedContainerRect; 221 imageBufferSize.scale(imageBufferScale.width(), imageBufferScale.height()); 222 223 OwnPtr<ImageBuffer> buffer = ImageBuffer::create(expandedIntSize(imageBufferSize.size())); 224 if (!buffer) // Failed to allocate buffer. 225 return; 226 227 drawForContainer(buffer->context(), containerSize, zoom, imageBufferSize, zoomedContainerRect, CompositeSourceOver, blink::WebBlendModeNormal); 228 RefPtr<Image> image = buffer->copyImage(DontCopyBackingStore, Unscaled); 229 230 // Adjust the source rect and transform due to the image buffer's scaling. 231 FloatRect scaledSrcRect = srcRect; 232 scaledSrcRect.scale(imageBufferScale.width(), imageBufferScale.height()); 233 234 image->drawPattern(context, scaledSrcRect, scaleWithoutCTM, phase, compositeOp, dstRect, blendMode, repeatSpacing); 235 } 236 237 void SVGImage::draw(GraphicsContext* context, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator compositeOp, blink::WebBlendMode blendMode) 238 { 239 if (!m_page) 240 return; 241 242 GraphicsContextStateSaver stateSaver(*context); 243 context->setCompositeOperation(compositeOp, blendMode); 244 context->clip(enclosingIntRect(dstRect)); 245 if (compositeOp != CompositeSourceOver) 246 context->beginTransparencyLayer(1); 247 248 FloatSize scale(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height()); 249 250 // We can only draw the entire frame, clipped to the rect we want. So compute where the top left 251 // of the image would be if we were drawing without clipping, and translate accordingly. 252 FloatSize topLeftOffset(srcRect.location().x() * scale.width(), srcRect.location().y() * scale.height()); 253 FloatPoint destOffset = dstRect.location() - topLeftOffset; 254 255 context->translate(destOffset.x(), destOffset.y()); 256 context->scale(scale); 257 258 FrameView* view = frameView(); 259 view->resize(containerSize()); 260 261 if (view->needsLayout()) 262 view->layout(); 263 264 view->paint(context, enclosingIntRect(srcRect)); 265 266 if (compositeOp != CompositeSourceOver) 267 context->endLayer(); 268 269 stateSaver.restore(); 270 271 if (imageObserver()) 272 imageObserver()->didDraw(this); 273 } 274 275 RenderBox* SVGImage::embeddedContentBox() const 276 { 277 if (!m_page) 278 return 0; 279 Frame* frame = m_page->mainFrame(); 280 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 281 if (!rootElement) 282 return 0; 283 return toRenderBox(rootElement->renderer()); 284 } 285 286 FrameView* SVGImage::frameView() const 287 { 288 if (!m_page) 289 return 0; 290 291 return m_page->mainFrame()->view(); 292 } 293 294 bool SVGImage::hasRelativeWidth() const 295 { 296 if (!m_page) 297 return false; 298 Frame* frame = m_page->mainFrame(); 299 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 300 if (!rootElement) 301 return false; 302 return rootElement->intrinsicWidth().isPercent(); 303 } 304 305 bool SVGImage::hasRelativeHeight() const 306 { 307 if (!m_page) 308 return false; 309 Frame* frame = m_page->mainFrame(); 310 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 311 if (!rootElement) 312 return false; 313 return rootElement->intrinsicHeight().isPercent(); 314 } 315 316 void SVGImage::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) 317 { 318 if (!m_page) 319 return; 320 Frame* frame = m_page->mainFrame(); 321 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 322 if (!rootElement) 323 return; 324 325 intrinsicWidth = rootElement->intrinsicWidth(); 326 intrinsicHeight = rootElement->intrinsicHeight(); 327 if (rootElement->preserveAspectRatioCurrentValue().align() == SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE) 328 return; 329 330 intrinsicRatio = rootElement->viewBoxCurrentValue().size(); 331 if (intrinsicRatio.isEmpty() && intrinsicWidth.isFixed() && intrinsicHeight.isFixed()) 332 intrinsicRatio = FloatSize(floatValueForLength(intrinsicWidth, 0), floatValueForLength(intrinsicHeight, 0)); 333 } 334 335 // FIXME: support catchUpIfNecessary. 336 void SVGImage::startAnimation(bool /* catchUpIfNecessary */) 337 { 338 if (!m_page) 339 return; 340 Frame* frame = m_page->mainFrame(); 341 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 342 if (!rootElement) 343 return; 344 rootElement->unpauseAnimations(); 345 rootElement->setCurrentTime(0); 346 } 347 348 void SVGImage::stopAnimation() 349 { 350 if (!m_page) 351 return; 352 Frame* frame = m_page->mainFrame(); 353 SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement(); 354 if (!rootElement) 355 return; 356 rootElement->pauseAnimations(); 357 } 358 359 void SVGImage::resetAnimation() 360 { 361 stopAnimation(); 362 } 363 364 bool SVGImage::dataChanged(bool allDataReceived) 365 { 366 TRACE_EVENT0("webkit", "SVGImage::dataChanged"); 367 368 // Don't do anything if is an empty image. 369 if (!data()->size()) 370 return true; 371 372 if (allDataReceived) { 373 static FrameLoaderClient* dummyFrameLoaderClient = new EmptyFrameLoaderClient; 374 375 Page::PageClients pageClients; 376 fillWithEmptyClients(pageClients); 377 m_chromeClient = adoptPtr(new SVGImageChromeClient(this)); 378 pageClients.chromeClient = m_chromeClient.get(); 379 380 // FIXME: If this SVG ends up loading itself, we might leak the world. 381 // The Cache code does not know about ImageResources holding Frames and 382 // won't know to break the cycle. 383 // This will become an issue when SVGImage will be able to load other 384 // SVGImage objects, but we're safe now, because SVGImage can only be 385 // loaded by a top-level document. 386 m_page = adoptPtr(new Page(pageClients)); 387 m_page->settings().setMediaEnabled(false); 388 m_page->settings().setScriptEnabled(false); 389 m_page->settings().setPluginsEnabled(false); 390 m_page->settings().setAcceleratedCompositingEnabled(false); 391 392 RefPtr<Frame> frame = Frame::create(FrameInit::create(0, m_page.get(), dummyFrameLoaderClient)); 393 frame->setView(FrameView::create(frame.get())); 394 frame->init(); 395 FrameLoader& loader = frame->loader(); 396 loader.forceSandboxFlags(SandboxAll); 397 398 frame->view()->setScrollbarsSuppressed(true); 399 frame->view()->setCanHaveScrollbars(false); // SVG Images will always synthesize a viewBox, if it's not available, and thus never see scrollbars. 400 frame->view()->setTransparent(true); // SVG Images are transparent. 401 402 ASSERT(loader.activeDocumentLoader()); // DocumentLoader should have been created by frame->init(). 403 DocumentWriter* writer = loader.activeDocumentLoader()->beginWriting("image/svg+xml", "UTF-8"); 404 writer->addData(data()->data(), data()->size()); 405 loader.activeDocumentLoader()->endWriting(writer); 406 // Set the intrinsic size before a container size is available. 407 m_intrinsicSize = containerSize(); 408 } 409 410 return m_page; 411 } 412 413 String SVGImage::filenameExtension() const 414 { 415 return "svg"; 416 } 417 418 } 419
