Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 425 insertions, 0 deletions

diff --git a/ksvg/plugin/backends/libart/LibartCanvas.cpp b/ksvg/plugin/backends/libart/LibartCanvas.cpp
new file mode 100644
index 00000000..5697b623
--- /dev/null
+++ b/ksvg/plugin/backends/libart/LibartCanvas.cpp
@@ -0,0 +1,425 @@
+/*
+    Copyright (C) 2001-2003 KSVG Team
+    This file is part of the KDE project
+
+    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
+    aint 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 "LibartCanvas.h"
+#include "SVGMatrixImpl.h"
+#include "SVGRectImpl.h"
+#include "SVGPaintImpl.h"
+#include "SVGShapeImpl.h"
+#include "SVGDocumentImpl.h"
+#include "SVGSVGElementImpl.h"
+#include "SVGStringListImpl.h"
+#include "SVGPatternElementImpl.h"
+#include "SVGGradientElementImpl.h"
+#include "SVGLinearGradientElementImpl.h"
+#include "SVGRadialGradientElementImpl.h"
+#include "SVGClipPathElementImpl.h"
+#include "SVGTextPositioningElementImpl.h"
+#include "SVGAnimatedLengthImpl.h"
+#include "SVGAnimatedLengthListImpl.h"
+#include "SVGAnimatedEnumerationImpl.h"
+#include "SVGMarkerElementImpl.h"
+#include "SVGMaskElementImpl.h"
+
+#include <kdebug.h>
+#include <kglobal.h>
+#include <kgenericfactory.h>
+
+#include "SVGPaint.h"
+
+#include <qdatetime.h>
+#include <qstring.h>
+#include <qimage.h>
+
+#include "KSVGHelper.h"
+#include "KSVGTextChunk.h"
+#include "LibartCanvasItems.h"
+
+#include <libart_lgpl/art_rgb.h>
+#include <libart_lgpl/art_affine.h>
+#include <libart_lgpl/art_alphagamma.h>
+#include <libart_lgpl/art_rgb_svp.h>
+#include <libart_lgpl/art_svp.h>
+#include <libart_lgpl/art_svp_ops.h>
+#include <libart_lgpl/art_svp_intersect.h>
+#include <libart_lgpl/art_rect_svp.h>
+#include <libart_lgpl/art_svp_vpath.h>
+
+#include <libs/art_support/art_misc.h>
+#include <libs/art_support/art_rgba_svp.h>
+
+#include <Font.h>
+#include "BezierPathLibart.h"
+#include "GlyphTracerLibart.h"
+
+#include <fontconfig/fontconfig.h>
+
+ArtSVP *art_svp_from_rect(int x0, int y0, int x1, int y1)
+{
+	ArtVpath vpath[] =
+	{
+		{ ART_MOVETO, x0, y0 },
+		{ ART_LINETO, x0, y1 },
+		{ ART_LINETO, x1, y1 },
+		{ ART_LINETO, x1, y0 },
+		{ ART_LINETO, x0, y0 },
+		{ ART_END, 0, 0}
+	};
+
+	return art_svp_from_vpath(vpath);
+} 
+
+ArtSVP *art_svp_from_irect(ArtIRect *bbox)
+{
+	return art_svp_from_rect(bbox->x0, bbox->y0, bbox->x1, bbox->y1);
+} 
+
+ArtSVP *art_svp_from_qrect(const QRect& rect)
+{
+	return art_svp_from_rect(rect.left(), rect.top(), rect.right() + 1, rect.bottom() + 1);
+} 
+
+using namespace KSVG;
+
+LibartCanvas::LibartCanvas(unsigned int width, unsigned int height) : KSVGCanvas(width, height)
+{
+	m_fontContext = new T2P::Converter(new T2P::GlyphTracerLibart());
+}
+
+T2P::BezierPath *LibartCanvas::toBezierPath(CanvasItem *item) const
+{
+	LibartPath *path = dynamic_cast<LibartPath *>(item);
+	if(!path)
+		return 0;
+
+	// Only handle LibartPath items
+	//T2P::BezierPathLibart *result = new T2P::BezierPathLibart(path->m_array.data());
+	return path;
+}
+
+// drawing primitives
+CanvasItem *LibartCanvas::createRectangle(SVGRectElementImpl *rect)
+{
+	return new LibartRectangle(this, rect);
+}
+
+CanvasItem *LibartCanvas::createEllipse(SVGEllipseElementImpl *ellipse)
+{
+	return new LibartEllipse(this, ellipse);
+}
+
+CanvasItem *LibartCanvas::createCircle(SVGCircleElementImpl *circle)
+{
+	return new LibartCircle(this, circle);
+}
+
+CanvasItem *LibartCanvas::createLine(SVGLineElementImpl *line)
+{
+	return new LibartLine(this, line);
+}
+
+CanvasItem *LibartCanvas::createPolyline(SVGPolylineElementImpl *poly)
+{
+	return new LibartPolyline(this, poly);
+}
+
+CanvasItem *LibartCanvas::createPolygon(SVGPolygonElementImpl *poly)
+{
+	return new LibartPolygon(this, poly);
+}
+
+CanvasItem *LibartCanvas::createPath(SVGPathElementImpl *path)
+{
+	return new LibartPath(this, path);
+}
+
+CanvasItem *LibartCanvas::createClipPath(SVGClipPathElementImpl *clippath)
+{
+	CanvasClipPath *result = new LibartClipPath(this, clippath);
+	QString index = clippath->id().string();
+	m_clipPaths.insert(index, result);
+	return result;
+}
+
+CanvasItem *LibartCanvas::createImage(SVGImageElementImpl *image)
+{
+	return new LibartImage(this, image);
+}
+
+CanvasItem *LibartCanvas::createCanvasMarker(SVGMarkerElementImpl *marker)
+{
+	return new LibartMarker(this, marker);
+}
+
+CanvasItem *LibartCanvas::createText(SVGTextElementImpl *text)
+{
+	return new LibartText(this, text);
+}
+
+CanvasPaintServer *LibartCanvas::createPaintServer(SVGElementImpl *pserver)
+{
+	LibartPaintServer *result;
+	if(dynamic_cast<SVGLinearGradientElementImpl *>(pserver))
+		result = new LibartLinearGradient(dynamic_cast<SVGLinearGradientElementImpl *>(pserver));
+	else if(dynamic_cast<SVGRadialGradientElementImpl *>(pserver))
+		result = new LibartRadialGradient(dynamic_cast<SVGRadialGradientElementImpl *>(pserver));
+	else if(dynamic_cast<SVGPatternElementImpl *>(pserver))
+		result = new LibartPattern(dynamic_cast<SVGPatternElementImpl *>(pserver));
+	return result;
+}
+
+void LibartCanvas::drawImage(QImage image, SVGStylableImpl *style, const SVGMatrixImpl *matrix, const KSVGPolygon& clippingPolygon)
+{
+	SVGShapeImpl *shape = dynamic_cast<SVGShapeImpl *>(style);
+
+	if(shape)
+	{
+		if(image.depth() != 32)
+			image = image.convertDepth(32);
+
+		ArtSVP *imageBorder = svpFromPolygon(clippingPolygon);
+		ArtSVP *clipSvp = clipSingleSVP(imageBorder, shape);
+
+		ArtDRect bbox;
+		art_drect_svp(&bbox, clipSvp);
+
+		// clamp to viewport
+		int x0 = int(bbox.x0);
+		int y0 = int(bbox.y0);
+
+		// Use inclusive coords for x1/y1 for clipToBuffer
+		int x1 = int(ceil(bbox.x1)) - 1;
+		int y1 = int(ceil(bbox.y1)) - 1;
+
+		if(x0 < int(m_width) && y0 < int(m_height) && x1 >= 0 && y1 >= 0)
+		{
+			clipToBuffer(x0, y0, x1, y1);
+
+			QRect screenBBox(x0, y0, x1 - x0 + 1, y1 - y0 + 1);
+
+			QByteArray mask = SVGMaskElementImpl::maskRectangle(shape, screenBBox);
+
+			double affine[6];
+			KSVGHelper::matrixToAffine(matrix, affine);
+
+			ksvg_art_rgb_affine_clip(clipSvp, m_buffer + x0 * nrChannels() + y0 * rowStride(), x0, y0, x1 + 1, y1 + 1, rowStride(), nrChannels(), image.bits(), image.width(), image.height(), image.width() * 4, affine, int(style->getOpacity() * 255), (const art_u8 *)mask.data());
+		}
+
+		art_svp_free(imageBorder);
+		art_svp_free(clipSvp);
+	}
+}
+
+ArtSVP *LibartCanvas::clippingRect(const QRect &rect, const SVGMatrixImpl *ctm)
+{
+	ArtVpath *vec = allocVPath(6);
+	// Order of points in clipping rectangle must be counter-clockwise
+	bool flip = ((ctm->a() * ctm->d()) < (ctm->b() * ctm->c()));
+
+	vec[0].code = ART_MOVETO;
+	vec[0].x = rect.x();
+	vec[0].y = rect.y();
+
+	vec[1].code = ART_LINETO;
+	vec[1].x = rect.x() + (flip ? rect.width() : 0);
+	vec[1].y = rect.y() + (flip ? 0 : rect.height());
+
+	vec[2].code = ART_LINETO;
+	vec[2].x = rect.x() + rect.width();
+	vec[2].y = rect.y() + rect.height();
+
+	vec[3].code = ART_LINETO;
+	vec[3].x = rect.x() + (flip ? 0 : rect.width());
+	vec[3].y = rect.y() + (flip ? rect.height() : 0);
+
+	vec[4].code = ART_LINETO;
+	vec[4].x = rect.x();
+	vec[4].y = rect.y();
+
+	vec[5].code = ART_END;
+
+	double affine[6];
+	KSVGHelper::matrixToAffine(ctm, affine);
+
+	ArtVpath *temp = art_vpath_affine_transform(vec, affine);
+	art_free(vec);
+
+	ArtSVP *result = art_svp_from_vpath(temp);
+	art_free(temp);
+	return result;
+}
+
+ArtSVP *LibartCanvas::clipSingleSVP(ArtSVP *svp, SVGShapeImpl *shape)
+{
+	ArtSVP *clippedSvp = copy_svp(svp);
+	SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(shape);
+
+	if(style)
+	{
+		QString clipPathRef = style->getClipPath();
+
+		if(!clipPathRef.isEmpty())
+		{
+			CanvasClipPath *clipPath = m_clipPaths[clipPathRef];
+
+			if(clipPath)
+			{
+				LibartClipPath *lclip = dynamic_cast<LibartClipPath *>(clipPath);
+				reinterpret_cast<SVGClipPathElementImpl *>(clipPath->element())->setBBoxTarget(shape);
+
+				lclip->init();
+
+				if(lclip->clipSVP())
+				{
+					ArtSVP *s = art_svp_intersect(lclip->clipSVP(), clippedSvp);
+					art_svp_free(clippedSvp);
+					clippedSvp = s;
+				}
+			}
+		}
+	}
+
+	SVGSVGElementImpl *svg = dynamic_cast<SVGSVGElementImpl *>(shape);
+
+	// Clip outer svg, unless width and height not set
+	if(svg && (!svg->isRootElement() || !svg->getAttribute("width").isEmpty() || !svg->getAttribute("height").isEmpty()) && !svg->getOverflow())
+	{
+		ArtSVP *svgClip = clippingRect(svg->clip(), svg->screenCTM());
+		ArtSVP *s = art_svp_intersect(svgClip, clippedSvp);
+		art_svp_free(clippedSvp);
+		art_svp_free(svgClip);
+		clippedSvp = s;
+	}
+
+	if(dynamic_cast<SVGPatternElementImpl *>(shape) != 0)
+	{
+		// TODO: inherit clipping paths into tile space
+	}
+	else if(dynamic_cast<SVGMarkerElementImpl *>(shape) != 0)
+	{
+		SVGMarkerElementImpl *marker = static_cast<SVGMarkerElementImpl *>(shape);
+
+		if(!marker->clipShape().isEmpty())
+		{
+			ArtSVP *clipShape = svpFromPolygon(marker->clipShape());
+			ArtSVP *s = art_svp_intersect(clipShape, clippedSvp);
+			art_svp_free(clipShape);
+			art_svp_free(clippedSvp);
+			clippedSvp = s;
+		}
+
+		// TODO: inherit clipping paths into marker space
+	}
+	else
+	{
+		SVGElementImpl *element = dynamic_cast<SVGElementImpl *>(shape);
+		DOM::Node parentNode = element->parentNode();
+
+		if(!parentNode.isNull())
+		{
+			SVGElementImpl *parent = element->ownerDoc()->getElementFromHandle(parentNode.handle());
+
+			if(parent)
+			{
+				SVGShapeImpl *parentShape = dynamic_cast<SVGShapeImpl *>(parent);
+
+				if(parentShape)
+				{
+					// Clip against ancestor clipping paths
+					ArtSVP *parentClippedSvp = clipSingleSVP(clippedSvp, parentShape);
+					art_svp_free(clippedSvp);
+					clippedSvp = parentClippedSvp;
+				}
+			}
+		}
+	}
+
+	return clippedSvp;
+}
+
+void LibartCanvas::drawSVP(ArtSVP *svp, art_u32 color, QByteArray mask, QRect screenBBox)
+{
+	int x0 = screenBBox.left();
+	int y0 = screenBBox.top();
+	int x1 = screenBBox.right();
+	int y1 = screenBBox.bottom();
+
+	if(m_nrChannels == 3)
+	{
+		if(mask.data())
+			art_ksvg_rgb_svp_alpha_mask(svp, x0, y0, x1 + 1, y1 + 1, color, m_buffer + x0 * 3 + y0 * 3 * m_width, m_width * 3, 0, (art_u8 *)mask.data());
+		else
+			art_rgb_svp_alpha(svp, x0, y0, x1 + 1, y1 + 1, color, m_buffer + x0 * 3 + y0 * 3 * m_width, m_width * 3, 0);
+	}
+	else
+		art_ksvg_rgba_svp_alpha(svp, x0, y0, x1 + 1, y1 + 1, color, m_buffer + x0 * 4 + y0 * 4 * m_width, m_width * 4, 0, (art_u8 *)mask.data());
+}
+
+ArtSVP *LibartCanvas::copy_svp(const ArtSVP *svp)
+{
+	// No API to copy an SVP so do so without accessing the data structure directly.
+	ArtVpath *vec = allocVPath(1);
+
+	vec[0].code = ART_END;
+
+	ArtSVP *empty = art_svp_from_vpath(vec);
+	art_free(vec);
+
+	ArtSVP *result = art_svp_union(empty, svp);
+	art_svp_free(empty);
+
+	return result;
+}
+
+ArtSVP *LibartCanvas::svpFromPolygon(const KSVGPolygon& polygon)
+{
+	if(polygon.numPoints() > 2)
+	{
+		ArtVpath *points = new ArtVpath[polygon.numPoints() + 2];
+
+		points[0].code = ART_MOVETO;
+		points[0].x = polygon.point(0).x();
+		points[0].y = polygon.point(0).y();
+
+		unsigned int i;
+
+		for(i = 1; i < polygon.numPoints(); i++)
+		{
+			points[i].code = ART_LINETO;
+			points[i].x = polygon.point(i).x();
+			points[i].y = polygon.point(i).y();
+		}
+
+		points[i].code = ART_LINETO;
+		points[i].x = polygon.point(0).x();
+		points[i].y = polygon.point(0).y();
+
+		points[i + 1].code = ART_END;
+
+		ArtSVP *svp = art_svp_from_vpath(points);
+		delete [] points;
+
+		return svp;
+	}
+	else
+		return 0;
+} 
+
+// vim:ts=4:noet