| /* |
| * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2007 Rob Buis <buis@kde.org> |
| * Copyright (C) 2008 Dirk Schulze <krit@webkit.org> |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "core/layout/svg/LayoutSVGResourcePaintServer.h" |
| |
| #include "core/layout/svg/SVGResources.h" |
| #include "core/layout/svg/SVGResourcesCache.h" |
| #include "core/style/ComputedStyle.h" |
| #include "platform/graphics/skia/SkiaUtils.h" |
| #include "third_party/skia/include/core/SkPaint.h" |
| |
| namespace blink { |
| |
| SVGPaintServer::SVGPaintServer(Color color) : m_color(color) {} |
| |
| SVGPaintServer::SVGPaintServer(PassRefPtr<Gradient> gradient, |
| const AffineTransform& transform) |
| : m_gradient(gradient), m_transform(transform), m_color(Color::black) {} |
| |
| SVGPaintServer::SVGPaintServer(PassRefPtr<Pattern> pattern, |
| const AffineTransform& transform) |
| : m_pattern(pattern), m_transform(transform), m_color(Color::black) {} |
| |
| void SVGPaintServer::applyToSkPaint(SkPaint& paint, float paintAlpha) { |
| SkColor baseColor = m_gradient || m_pattern ? SK_ColorBLACK : m_color.rgb(); |
| paint.setColor(scaleAlpha(baseColor, paintAlpha)); |
| if (m_pattern) { |
| m_pattern->applyToPaint(paint, affineTransformToSkMatrix(m_transform)); |
| } else if (m_gradient) { |
| m_gradient->applyToPaint(paint, affineTransformToSkMatrix(m_transform)); |
| } else { |
| paint.setShader(nullptr); |
| } |
| } |
| |
| void SVGPaintServer::prependTransform(const AffineTransform& transform) { |
| ASSERT(m_gradient || m_pattern); |
| m_transform = transform * m_transform; |
| } |
| |
| static SVGPaintDescription requestPaint(const LayoutObject& object, |
| const ComputedStyle& style, |
| LayoutSVGResourceMode mode) { |
| // If we have no style at all, ignore it. |
| const SVGComputedStyle& svgStyle = style.svgStyle(); |
| |
| // If we have no fill/stroke, return 0. |
| if (mode == ApplyToFillMode) { |
| if (!svgStyle.hasFill()) |
| return SVGPaintDescription(); |
| } else { |
| if (!svgStyle.hasStroke()) |
| return SVGPaintDescription(); |
| } |
| |
| bool applyToFill = mode == ApplyToFillMode; |
| SVGPaintType paintType = |
| applyToFill ? svgStyle.fillPaintType() : svgStyle.strokePaintType(); |
| ASSERT(paintType != SVG_PAINTTYPE_NONE); |
| |
| Color color; |
| bool hasColor = false; |
| switch (paintType) { |
| case SVG_PAINTTYPE_CURRENTCOLOR: |
| case SVG_PAINTTYPE_URI_CURRENTCOLOR: |
| // The keyword `currentcolor` takes its value from the value of the |
| // `color` property on the same element. |
| color = style.visitedDependentColor(CSSPropertyColor); |
| hasColor = true; |
| break; |
| case SVG_PAINTTYPE_RGBCOLOR: |
| case SVG_PAINTTYPE_URI_RGBCOLOR: |
| color = |
| applyToFill ? svgStyle.fillPaintColor() : svgStyle.strokePaintColor(); |
| hasColor = true; |
| default: |
| break; |
| } |
| |
| if (style.insideLink() == InsideVisitedLink) { |
| // FIXME: This code doesn't support the uri component of the visited link |
| // paint, https://bugs.webkit.org/show_bug.cgi?id=70006 |
| SVGPaintType visitedPaintType = applyToFill |
| ? svgStyle.visitedLinkFillPaintType() |
| : svgStyle.visitedLinkStrokePaintType(); |
| |
| // For SVG_PAINTTYPE_CURRENTCOLOR, 'color' already contains the |
| // 'visitedColor'. |
| if (visitedPaintType < SVG_PAINTTYPE_URI_NONE && |
| visitedPaintType != SVG_PAINTTYPE_CURRENTCOLOR) { |
| const Color& visitedColor = applyToFill |
| ? svgStyle.visitedLinkFillPaintColor() |
| : svgStyle.visitedLinkStrokePaintColor(); |
| color = Color(visitedColor.red(), visitedColor.green(), |
| visitedColor.blue(), color.alpha()); |
| hasColor = true; |
| } |
| } |
| |
| // If the primary resource is just a color, return immediately. |
| if (paintType < SVG_PAINTTYPE_URI_NONE) { |
| // |paintType| will be either <current-color> or <rgb-color> here - both of |
| // which will have a color. |
| ASSERT(hasColor); |
| return SVGPaintDescription(color); |
| } |
| |
| LayoutSVGResourcePaintServer* uriResource = nullptr; |
| if (SVGResources* resources = |
| SVGResourcesCache::cachedResourcesForLayoutObject(&object)) |
| uriResource = applyToFill ? resources->fill() : resources->stroke(); |
| |
| // If the requested resource is not available, return the color resource or |
| // 'none'. |
| if (!uriResource) { |
| // The fallback is 'none'. (SVG2 say 'none' is implied when no fallback is |
| // specified.) |
| if (paintType == SVG_PAINTTYPE_URI_NONE || !hasColor) |
| return SVGPaintDescription(); |
| |
| return SVGPaintDescription(color); |
| } |
| |
| // The paint server resource exists, though it may be invalid (pattern with |
| // width/height=0). Return the fallback color to our caller so it can use it, |
| // if preparePaintServer() on the resource container failed. |
| if (hasColor) |
| return SVGPaintDescription(uriResource, color); |
| |
| return SVGPaintDescription(uriResource); |
| } |
| |
| SVGPaintServer SVGPaintServer::requestForLayoutObject( |
| const LayoutObject& layoutObject, |
| const ComputedStyle& style, |
| LayoutSVGResourceMode resourceMode) { |
| ASSERT(resourceMode == ApplyToFillMode || resourceMode == ApplyToStrokeMode); |
| |
| SVGPaintDescription paintDescription = |
| requestPaint(layoutObject, style, resourceMode); |
| if (!paintDescription.isValid) |
| return invalid(); |
| if (!paintDescription.resource) |
| return SVGPaintServer(paintDescription.color); |
| SVGPaintServer paintServer = |
| paintDescription.resource->preparePaintServer(layoutObject); |
| if (paintServer.isValid()) |
| return paintServer; |
| if (paintDescription.hasFallback) |
| return SVGPaintServer(paintDescription.color); |
| return invalid(); |
| } |
| |
| bool SVGPaintServer::existsForLayoutObject(const LayoutObject& layoutObject, |
| const ComputedStyle& style, |
| LayoutSVGResourceMode resourceMode) { |
| return requestPaint(layoutObject, style, resourceMode).isValid; |
| } |
| |
| LayoutSVGResourcePaintServer::LayoutSVGResourcePaintServer(SVGElement* element) |
| : LayoutSVGResourceContainer(element) {} |
| |
| LayoutSVGResourcePaintServer::~LayoutSVGResourcePaintServer() {} |
| |
| SVGPaintDescription LayoutSVGResourcePaintServer::requestPaintDescription( |
| const LayoutObject& layoutObject, |
| const ComputedStyle& style, |
| LayoutSVGResourceMode resourceMode) { |
| return requestPaint(layoutObject, style, resourceMode); |
| } |
| |
| } // namespace blink |