WebCore/ksvg2/misc/KCanvasRenderingStyle.cpp

   1 /*
   2     Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
   3                   2004, 2005 Rob Buis <buis@kde.org>
   4                         2006 Alexander Kellett <lypanov@kde.org>
   5
   6     This file is part of the KDE project
   7
   8     This library is free software; you can redistribute it and/or
   9     modify it under the terms of the GNU Library General Public
  10     License as published by the Free Software Foundation; either
  11     version 2 of the License, or (at your option) any later version.
  12
  13     This library is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16     Library General Public License for more details.
  17
  18     You should have received a copy of the GNU Library General Public License
  19     aint with this library; see the file COPYING.LIB.  If not, write to
  20     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21     Boston, MA 02111-1307, USA.
  22 */
  23
  24 #include "config.h"
  25 #if SVG_SUPPORT
  26
  27 #include <render_object.h>
  28
  29 #include <kcanvas/KCanvas.h>
  30 #include <kcanvas/KCanvasPath.h>
  31 #include <kcanvas/device/KRenderingDevice.h>
  32 #include <kcanvas/device/KRenderingFillPainter.h>
  33 #include <kcanvas/device/KRenderingStrokePainter.h>
  34 #include <kcanvas/device/KRenderingPaintServerSolid.h>
  35 #include <kcanvas/device/KRenderingPaintServerGradient.h>
  36 #include <kcanvas/device/KRenderingPaintServer.h>
  37
  38 #include "DocumentImpl.h"
  39 #include "PlatformString.h"
  40 #include "render_style.h"
  41 #include "css_valueimpl.h"
  42
  43 #include "ksvg.h"
  44 #include "SVGLengthImpl.h"
  45 #include "SVGStyledElementImpl.h"
  46 #include "KCanvasRenderingStyle.h"
  47 #include "SVGRenderStyle.h"
  48
  49 namespace WebCore {
  50
  51 static KRenderingPaintServerSolid* sharedSolidPaintServer()
  52 {
  53     static KRenderingPaintServerSolid* _sharedSolidPaintServer = 0;
  54     if (!_sharedSolidPaintServer)
  55         _sharedSolidPaintServer = static_cast<KRenderingPaintServerSolid *>(QPainter::renderingDevice()->createPaintServer(PS_SOLID));
  56     return _sharedSolidPaintServer;
  57 }
  58
  59 bool KSVGPainterFactory::isFilled(const RenderStyle *style)
  60 {
  61     SVGPaintImpl *fill = style->svgStyle()->fillPaint();
  62     if (fill && fill->paintType() == SVG_PAINTTYPE_NONE)
  63         return false;
  64     return true;
  65 }
  66
  67 KRenderingPaintServer *KSVGPainterFactory::fillPaintServer(const RenderStyle* style, const RenderObject* item)
  68 {
  69     if (!isFilled(style))
  70         return 0;
  71
  72     SVGPaintImpl *fill = style->svgStyle()->fillPaint();
  73
  74     KRenderingPaintServer *fillPaintServer;
  75     if (!fill) {
  76         // initial value (black)
  77         fillPaintServer = sharedSolidPaintServer();
  78         static_cast<KRenderingPaintServerSolid *>(fillPaintServer)->setColor(Color::black);
  79     } else if (fill->paintType() == SVG_PAINTTYPE_URI) {
  80         DOMString id(fill->uri());
  81         fillPaintServer = getPaintServerById(item->document(), id.qstring().mid(1));
  82         if (item && fillPaintServer && item->isRenderPath())
  83             fillPaintServer->addClient(static_cast<const RenderPath*>(item));
  84     } else {
  85         fillPaintServer = sharedSolidPaintServer();
  86         KRenderingPaintServerSolid *fillPaintServerSolid = static_cast<KRenderingPaintServerSolid *>(fillPaintServer);
  87         if (fill->paintType() == SVG_PAINTTYPE_CURRENTCOLOR)
  88             fillPaintServerSolid->setColor(style->color());
  89         else
  90             fillPaintServerSolid->setColor(fill->color());
  91     }
  92
  93     return fillPaintServer;
  94 }
  95
  96
  97 bool KSVGPainterFactory::isStroked(const RenderStyle *style)
  98 {
  99     SVGPaintImpl *stroke = style->svgStyle()->strokePaint();
 100     if (!stroke || stroke->paintType() == SVG_PAINTTYPE_NONE)
 101         return false;
 102     return true;
 103 }
 104
 105 KRenderingPaintServer *KSVGPainterFactory::strokePaintServer(const RenderStyle* style, const RenderObject* item)
 106 {
 107     if (!isStroked(style))
 108         return 0;
 109
 110     SVGPaintImpl *stroke = style->svgStyle()->strokePaint();
 111
 112     KRenderingPaintServer *strokePaintServer;
 113     if (stroke && stroke->paintType() == SVG_PAINTTYPE_URI) {
 114         DOMString id(stroke->uri());
 115         strokePaintServer = getPaintServerById(item->document(), id.qstring().mid(1));
 116         if(item && strokePaintServer && item->isRenderPath())
 117             strokePaintServer->addClient(static_cast<const RenderPath*>(item));
 118     } else {
 119         strokePaintServer = sharedSolidPaintServer();
 120         KRenderingPaintServerSolid *strokePaintServerSolid = static_cast<KRenderingPaintServerSolid *>(strokePaintServer);
 121         if (stroke->paintType() == SVG_PAINTTYPE_CURRENTCOLOR)
 122             strokePaintServerSolid->setColor(style->color());
 123         else
 124             strokePaintServerSolid->setColor(stroke->color());
 125     }
 126
 127     return strokePaintServer;
 128 }
 129
 130 double KSVGPainterFactory::cssPrimitiveToLength(const RenderObject* item, CSSValueImpl *value, double defaultValue)
 131 {
 132     CSSPrimitiveValueImpl *primitive = static_cast<CSSPrimitiveValueImpl *>(value);
 133
 134     unsigned short cssType = (primitive ? primitive->primitiveType() : (unsigned short) CSSPrimitiveValue::CSS_UNKNOWN);
 135     if(!(cssType > CSSPrimitiveValue::CSS_UNKNOWN && cssType <= CSSPrimitiveValue::CSS_PC))
 136         return defaultValue;
 137
 138     if(cssType == CSSPrimitiveValue::CSS_PERCENTAGE)
 139     {
 140         SVGElementImpl *element = static_cast<SVGElementImpl *>(item->element());
 141         SVGElementImpl *viewportElement = (element ? element->viewportElement() : 0);
 142         if(viewportElement)
 143         {
 144             double result = primitive->getFloatValue(CSSPrimitiveValue::CSS_PERCENTAGE) / 100.0;
 145             return SVGHelper::PercentageOfViewport(result, viewportElement, LM_OTHER);
 146         }
 147     }
 148
 149     return primitive->computeLengthFloat(const_cast<RenderStyle *>(item->style()));
 150 }
 151
 152 KRenderingStrokePainter KSVGPainterFactory::strokePainter(const RenderStyle* style, const RenderObject* item)
 153 {
 154     KRenderingStrokePainter strokePainter;
 155
 156     strokePainter.setOpacity(style->svgStyle()->strokeOpacity());
 157     strokePainter.setStrokeWidth(KSVGPainterFactory::cssPrimitiveToLength(item, style->svgStyle()->strokeWidth(), 1.0));
 158
 159     CSSValueListImpl *dashes = style->svgStyle()->strokeDashArray();
 160     if (dashes) {
 161         CSSPrimitiveValueImpl *dash = 0;
 162         KCDashArray array;
 163         unsigned long len = dashes->length();
 164         for (unsigned long i = 0; i < len; i++) {
 165             dash = static_cast<CSSPrimitiveValueImpl *>(dashes->item(i));
 166             if (dash)
 167                 array.append((float) dash->computeLengthFloat(const_cast<RenderStyle *>(style)));
 168         }
 169
 170         strokePainter.setDashArray(array);
 171         strokePainter.setDashOffset(KSVGPainterFactory::cssPrimitiveToLength(item, style->svgStyle()->strokeDashOffset(), 0.0));
 172     }
 173
 174     strokePainter.setStrokeMiterLimit(style->svgStyle()->strokeMiterLimit());
 175     strokePainter.setStrokeCapStyle((KCCapStyle) style->svgStyle()->capStyle());
 176     strokePainter.setStrokeJoinStyle((KCJoinStyle) style->svgStyle()->joinStyle());
 177
 178     return strokePainter;
 179 }
 180
 181 KRenderingFillPainter KSVGPainterFactory::fillPainter(const RenderStyle* style, const RenderObject* item)
 182 {
 183     KRenderingFillPainter fillPainter;
 184
 185     fillPainter.setFillRule(style->svgStyle()->fillRule() == WR_NONZERO ? RULE_NONZERO : RULE_EVENODD);
 186     fillPainter.setOpacity(style->svgStyle()->fillOpacity());
 187
 188     return fillPainter;
 189 }
 190
 191 }
 192
 193 // vim:ts=4:noet
 194 #endif // SVG_SUPPORT
 195