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/*
* 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 "config.h"
#include "core/rendering/svg/RenderSVGResourcePaintServer.h"
#include "core/rendering/style/RenderStyle.h"
#include "core/rendering/svg/SVGResources.h"
#include "core/rendering/svg/SVGResourcesCache.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/GraphicsContextStateSaver.h"
namespace blink {
SVGPaintServer::SVGPaintServer(Color color)
: m_color(color)
{
}
SVGPaintServer::SVGPaintServer(PassRefPtr<Gradient> gradient)
: m_gradient(gradient)
, m_color(Color::black)
{
}
SVGPaintServer::SVGPaintServer(PassRefPtr<Pattern> pattern)
: m_pattern(pattern)
, m_color(Color::black)
{
}
void SVGPaintServer::apply(GraphicsContext& context, RenderSVGResourceMode resourceMode, GraphicsContextStateSaver* stateSaver)
{
ASSERT(resourceMode == ApplyToFillMode || resourceMode == ApplyToStrokeMode);
if (stateSaver && (m_gradient || m_pattern))
stateSaver->saveIfNeeded();
if (resourceMode == ApplyToFillMode) {
if (m_pattern)
context.setFillPattern(m_pattern);
else if (m_gradient)
context.setFillGradient(m_gradient);
else
context.setFillColor(m_color);
} else {
if (m_pattern)
context.setStrokePattern(m_pattern);
else if (m_gradient)
context.setStrokeGradient(m_gradient);
else
context.setStrokeColor(m_color);
}
}
void SVGPaintServer::prependTransform(const AffineTransform& transform)
{
ASSERT(m_gradient || m_pattern);
if (m_pattern)
m_pattern->setPatternSpaceTransform(transform * m_pattern->patternSpaceTransform());
else
m_gradient->setGradientSpaceTransform(transform * m_gradient->gradientSpaceTransform());
}
static SVGPaintDescription requestPaint(const RenderObject& object, const RenderStyle* style, RenderSVGResourceMode mode)
{
ASSERT(style);
// If we have no style at all, ignore it.
const SVGRenderStyle& 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_RGBCOLOR:
case SVG_PAINTTYPE_URI_CURRENTCOLOR:
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);
}
RenderSVGResourcePaintServer* uriResource = 0;
if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(&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::requestForRenderer(const RenderObject& renderer, const RenderStyle* style, RenderSVGResourceMode resourceMode)
{
ASSERT(style);
ASSERT(resourceMode == ApplyToFillMode || resourceMode == ApplyToStrokeMode);
SVGPaintDescription paintDescription = requestPaint(renderer, style, resourceMode);
if (!paintDescription.isValid)
return invalid();
if (!paintDescription.resource)
return SVGPaintServer(paintDescription.color);
SVGPaintServer paintServer = paintDescription.resource->preparePaintServer(renderer);
if (paintServer.isValid())
return paintServer;
if (paintDescription.hasFallback)
return SVGPaintServer(paintDescription.color);
return invalid();
}
bool SVGPaintServer::existsForRenderer(const RenderObject& renderer, const RenderStyle* style, RenderSVGResourceMode resourceMode)
{
return requestPaint(renderer, style, resourceMode).isValid;
}
RenderSVGResourcePaintServer::RenderSVGResourcePaintServer(SVGElement* element)
: RenderSVGResourceContainer(element)
{
}
RenderSVGResourcePaintServer::~RenderSVGResourcePaintServer()
{
}
SVGPaintDescription RenderSVGResourcePaintServer::requestPaintDescription(const RenderObject& renderer, const RenderStyle* style, RenderSVGResourceMode resourceMode)
{
return requestPaint(renderer, style, resourceMode);
}
}
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