TDEHTML: SVG rendering support for <img> tag.

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

6 files changed, 247 insertions, 29 deletions

diff --git a/tdehtml/misc/CMakeLists.txt b/tdehtml/misc/CMakeLists.txt
index 0babd6567..934953297 100644
--- a/tdehtml/misc/CMakeLists.txt
+++ b/tdehtml/misc/CMakeLists.txt
@@ -33,7 +33,7 @@ set( target tdehtmlmisc )
 set( ${target}_SRCS
   decoder.cpp loader.cpp loader_jpeg.cpp guess_ja.cpp
   htmlhashes.cpp helper.cpp arena.cpp stringit.cpp
-  knsplugininstaller.cpp
+  knsplugininstaller.cpp svgrender.cpp
 )
 
 tde_add_library( ${target} STATIC_PIC AUTOMOC
diff --git a/tdehtml/misc/loader.cpp b/tdehtml/misc/loader.cpp
index 7621b5e4f..c6fd83bf1 100644
--- a/tdehtml/misc/loader.cpp
+++ b/tdehtml/misc/loader.cpp
@@ -74,6 +74,8 @@
 #include <tdetempfile.h>
 #endif
 
+#include "svgrender.h"
+
 #include "html/html_documentimpl.h"
 #include "css/css_stylesheetimpl.h"
 #include "xml/dom_docimpl.h"
@@ -461,7 +463,7 @@ private:
 
 static TQString buildAcceptHeader()
 {
-    return "image/png, image/jpeg, video/x-mng, image/jp2, image/gif;q=0.5,*/*;q=0.1";
+    return "image/png, image/jpeg, image/svg+xml, video/x-mng, image/jp2, image/gif;q=0.5,*/*;q=0.1";
 }
 
 // -------------------------------------------------------------------------------------
@@ -490,6 +492,18 @@ CachedImage::CachedImage(DocLoader* dl, const DOMString &url, TDEIO::CacheContro
         m_wasBlocked = true;
         CachedObject::finish();
     }
+
+    /* SVG support */
+    isSVGZ    = url.string().lower().endsWith(".svgz"); // used for setting correct temp file extension
+    isSVG     = url.string().lower().endsWith(".svg") || isSVGZ;
+    svgData   = TQByteArray();
+    svgRender = new TQPixmap();
+#ifndef HAVE_LIBART
+    if(isSVG)
+    {
+        kdDebug(6060) << url.string() << " is a SVG(Z) file but tdelibs was compiled without LIBART support" << endl;
+    }
+#endif
 }
 
 CachedImage::~CachedImage()
@@ -654,6 +668,12 @@ const TQPixmap &CachedImage::pixmap( ) const
         else
             return m->framePixmap();
     }
+
+    else if(isSVG)
+    {
+        return *svgRender;
+    }
+
     else if(p)
         return *p;
 
@@ -663,15 +683,56 @@ const TQPixmap &CachedImage::pixmap( ) const
 
 TQSize CachedImage::pixmap_size() const
 {
-    if (m_wasBlocked) return Cache::blockedPixmap->size();
-    return (m_hadError ? Cache::brokenPixmap->size() : m ? m->framePixmap().size() : ( p ? p->size() : TQSize()));
+    if(m_wasBlocked)
+    {
+        return Cache::blockedPixmap->size();
+    }
+    else if(m_hadError)
+    {
+        return Cache::brokenPixmap->size();
+    }
+    else if(isSVG)
+    {
+        return svgRender->size();
+    }
+    else if(m)
+    {
+        return m->framePixmap().size();
+    }
+    else if(p)
+    {
+        return p->size();
+    }
+    else
+    {
+        return TQSize();
+    }
 }
 
 
 TQRect CachedImage::valid_rect() const
 {
-    if (m_wasBlocked) return Cache::blockedPixmap->rect();
-    return (m_hadError ? Cache::brokenPixmap->rect() : m ? TQRect(m->getValidRect()) : ( p ? TQRect(p->rect()) : TQRect()) );
+    if (m_wasBlocked)
+    {
+        return Cache::blockedPixmap->rect();
+    }
+    else if (m_hadError)
+    {
+        return Cache::brokenPixmap->rect();
+    }
+    else if(isSVG)
+    {
+        return TQRect(svgRender->rect());
+    }
+    else if(m)
+    {
+        return TQRect(m->getValidRect());
+    }
+    else if(p)
+    {
+        return TQRect(p->rect());
+    }
+    return TQRect();
 }
 
 
@@ -681,7 +742,6 @@ void CachedImage::do_notify(const TQPixmap& p, const TQRect& r)
         it()->setPixmap( p, r, this);
 }
 
-
 void CachedImage::movieUpdated( const TQRect& r )
 {
 #ifdef LOADER_DEBUG
@@ -820,6 +880,11 @@ void CachedImage::clear()
     bgSize = TQSize(-1,-1);
     delete pixPart; pixPart = 0;
 
+    isSVG     = false;
+    isSVGZ    = false;
+    svgData   = TQByteArray();
+    svgRender = 0;
+
     formatType = 0;
     typeChecked = false;
     setSize(0);
@@ -833,6 +898,32 @@ void CachedImage::data ( TQBuffer &_buffer, bool eof )
 #ifdef LOADER_DEBUG
     kdDebug( 6060 ) << this << "in CachedImage::data(buffersize " << _buffer.buffer().size() <<", eof=" << eof << endl;
 #endif
+
+    if( isSVG && eof )
+    {
+        /* Store SVG data for later use */
+        svgData = _buffer.buffer();
+
+#ifdef HAVE_LIBART
+        /* Render and store SVG as pixmap */
+        TQImage i = renderSVG(svgData, svgExtension());
+        if(i.isNull())
+        {
+            m_hadError = true;
+            return;
+        }
+
+        if(!svgRender->convertFromImage(i))
+        {
+            kdDebug(6060) << "Could not convert TQImage of rendered SVG to TQPixmap!" << endl;
+            m_hadError = true;
+        }
+#else
+        m_hadError = true;
+#endif
+        return;
+    }
+
     if ( !typeChecked )
     {
         // don't attempt incremental loading if we have all the data already
@@ -905,8 +996,8 @@ void CachedImage::finish()
     Status oldStatus = m_status;
     CachedObject::finish();
     if ( oldStatus != m_status ) {
-	const TQPixmap &pm = pixmap();
-	do_notify( pm, pm.rect() );
+        const TQPixmap &pm = pixmap();
+        do_notify( pm, pm.rect() );
     }
     TQSize s = pixmap_size();
     setSize( s.width() * s.height() * 2);
diff --git a/tdehtml/misc/loader.h b/tdehtml/misc/loader.h
index c60c13a98..087b28ffd 100644
--- a/tdehtml/misc/loader.h
+++ b/tdehtml/misc/loader.h
@@ -277,8 +277,11 @@ namespace tdehtml
         bool isTransparent() const { return isFullyTransparent; }
         bool isErrorImage() const { return m_hadError; }
         bool isBlockedImage() const { return m_wasBlocked; }
+        bool isVectorImage() const { return isSVG; }
         const TQString& suggestedFilename() const { return m_suggestedFilename; }
         void setSuggestedFilename( const TQString& s ) { m_suggestedFilename = s;  }
+        TQByteArray svg() const { return svgData; }
+        const TQString svgExtension() const { return (isSVGZ ? "svgz" : (isSVG ? "svg" : TQString::null)); }
 #ifdef IMAGE_TITLES
         const TQString& suggestedTitle() const { return m_suggestedTitle; }
         void setSuggestedTitle( const TQString& s ) { m_suggestedTitle = s;  }
@@ -313,10 +316,15 @@ namespace tdehtml
 #ifdef IMAGE_TITLES
         TQString m_suggestedTitle;
 #endif
-	TQMovie* m;
+        TQMovie*  m;
         TQPixmap* p;
-	TQPixmap* scaled;
-	TQPixmap* bg;
+        TQPixmap* scaled;
+        TQPixmap* bg;
+
+        bool        isSVG, isSVGZ;
+        TQByteArray svgData;
+        TQPixmap   *svgRender;
+
         QRgb bgColor;
         TQSize bgSize;
         mutable TQPixmap* pixPart;
diff --git a/tdehtml/misc/svgrender.cpp b/tdehtml/misc/svgrender.cpp
new file mode 100644
index 000000000..94766cdcf
--- /dev/null
+++ b/tdehtml/misc/svgrender.cpp
@@ -0,0 +1,74 @@
+/*
+ * This file is part of the Trinity libraries.
+ *
+ * Copyright (C) 2022 Mavridis Philippe <mavridisf@gmail.com>
+ *
+ * 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 "svgrender.h"
+
+#include <kdebug.h>
+
+#ifdef HAVE_LIBART
+#include <ksvgiconengine.h>
+#include <kstandarddirs.h>
+#include <tdetempfile.h>
+#endif
+
+
+TQImage renderSVG(TQByteArray ba, TQString svgExtension, int width, int height)
+{
+    if( svgExtension != TQString("svg") && svgExtension != TQString("svgz") )
+    {
+        return TQImage();
+    }
+
+#ifdef HAVE_LIBART
+    /* Write svg data to a temporary file so that we can process it with KSVGIconEngine */
+    KTempFile tf(locateLocal("tmp", "tdehtml"), TQString(".%1").arg(svgExtension));
+    if( tf.status() != 0 )
+    {
+        kdDebug(6060) << "[renderSVG] Cannot access temp file: " << tf.name() << endl;
+        return TQImage();
+    }
+    tf.dataStream()->writeRawBytes(ba, ba.size());
+    tf.sync();
+
+    /* Render the image */
+    TQImage        *render    = new TQImage();
+    KSVGIconEngine *svgEngine = new KSVGIconEngine();
+    if(svgEngine->load(width, height, tf.name()) )
+    {
+        render = svgEngine->image();
+    }
+    else
+    {
+        kdDebug(6060) << "[renderSVG] KSVGIconEngine could not load " << tf.name() << endl;
+        return TQImage();
+    }
+
+    /* Clean up */
+    tf.unlink();
+    delete svgEngine;
+
+    return *render;
+#else
+    kdDebug(6060) << "[renderSVG] tdelibs were built without libart support." << endl;
+    return TQImage();
+#endif
+}
\ No newline at end of file
diff --git a/tdehtml/misc/svgrender.h b/tdehtml/misc/svgrender.h
new file mode 100644
index 000000000..93a9cd46d
--- /dev/null
+++ b/tdehtml/misc/svgrender.h
@@ -0,0 +1,33 @@
+/*
+ * This file is part of the Trinity libraries.
+ *
+ * Copyright (C) 2022 Mavridis Philippe <mavridisf@gmail.com>
+ *
+ * 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.
+ *
+ */
+
+#ifndef _tdehtml_svgrender_h
+#define _tdehtml_svgrender_h
+
+#include <tqcstring.h> // tqbytearray
+#include <tqimage.h>
+
+#include "config.h" // HAVE_LIBART
+
+TQImage renderSVG(TQByteArray ba, TQString svgExtension, int width = 0, int height = 0);
+
+#endif
\ No newline at end of file
diff --git a/tdehtml/rendering/render_image.cpp b/tdehtml/rendering/render_image.cpp
index ad8f18bb3..18bc62aed 100644
--- a/tdehtml/rendering/render_image.cpp
+++ b/tdehtml/rendering/render_image.cpp
@@ -38,6 +38,7 @@
 #include "misc/helper.h"
 #include "misc/htmlattrs.h"
 #include "misc/loader.h"
+#include "misc/svgrender.h"
 #include "misc/htmltags.h"
 #include "html/html_formimpl.h"
 #include "html/html_imageimpl.h"
@@ -240,7 +241,7 @@ void RenderImage::paint(PaintInfo& paintInfo, int _tx, int _ty)
                      ? m_oldImage : m_cachedImage;
 
     // paint frame around image as long as it is not completely loaded from web.
-    if (bUnfinishedImageFrame && paintInfo.phase == PaintActionForeground && cWidth > 2 && cHeight > 2 && !complete()) {
+    if (bUnfinishedImageFrame && paintInfo.phase == PaintActionForeground && cWidth > 2 && cHeight > 2 && !complete() && !i->isVectorImage()) {
         static TQPixmap *loadingIcon;
         TQColor bg = tdehtml::retrieveBackgroundColor(this);
         TQColor fg = tdehtml::hasSufficientContrast(Qt::gray, bg) ? Qt::gray :
@@ -297,31 +298,42 @@ void RenderImage::paint(PaintInfo& paintInfo, int _tx, int _ty)
             if (resizeCache.isNull() && cWidth && cHeight && intrinsicWidth() && intrinsicHeight())
             {
                 TQRect scaledrect(i->valid_rect());
+                scaledrect.setWidth( ( cWidth*scaledrect.width() ) / intrinsicWidth() );
+                scaledrect.setHeight( ( cHeight*scaledrect.height() ) / intrinsicHeight() );
 //                 kdDebug(6040) << "time elapsed: " << dt->elapsed() << endl;
 //                  kdDebug( 6040 ) << "have to scale: " << endl;
 //                  tqDebug("cw=%d ch=%d  pw=%d ph=%d  rcw=%d, rch=%d",
 //                          cWidth, cHeight, intrinsicWidth(), intrinsicHeight(), resizeCache.width(), resizeCache.height());
-                TQWMatrix matrix;
-                matrix.scale( (float)(cWidth)/intrinsicWidth(),
-                              (float)(cHeight)/intrinsicHeight() );
-                resizeCache = pix.xForm( matrix );
-                scaledrect.setWidth( ( cWidth*scaledrect.width() ) / intrinsicWidth() );
-                scaledrect.setHeight( ( cHeight*scaledrect.height() ) / intrinsicHeight() );
+                if(i->isVectorImage())
+                {
+                    TQImage newRender = renderSVG(i->svg(), i->svgExtension(), cWidth, cHeight);
+                    if(!resizeCache.convertFromImage(newRender))
+                    {
+                        kdDebug(6040) << "Could not convert TQImage of rendered SVG to TQPixmap!" << endl;
+                    }
+                }
+                else
+                {
+                    TQWMatrix matrix;
+                    matrix.scale( (float)(cWidth)/intrinsicWidth(),
+                                   (float)(cHeight)/intrinsicHeight() );
+                    resizeCache = pix.xForm( matrix );
 //                   tqDebug("resizeCache size: %d/%d", resizeCache.width(), resizeCache.height());
 //                   tqDebug("valid: %d/%d, scaled: %d/%d",
 //                          i->valid_rect().width(), i->valid_rect().height(),
 //                          scaledrect.width(), scaledrect.height());
 
-                // sometimes scaledrect.width/height are off by one because
-                // of rounding errors. if the i is fully loaded, we
-                // make sure that we don't do unnecessary resizes during painting
-                TQSize s(scaledrect.size());
-                if(i->valid_rect().size() == TQSize( intrinsicWidth(), intrinsicHeight() )) // fully loaded
-                    s = TQSize(cWidth, cHeight);
-                if(kAbs(s.width() - cWidth) < 2) // rounding errors
-                    s.setWidth(cWidth);
-                if(resizeCache.size() != s)
-                    resizeCache.resize(s);
+                    // sometimes scaledrect.width/height are off by one because
+                    // of rounding errors. if the i is fully loaded, we
+                    // make sure that we don't do unnecessary resizes during painting
+                    TQSize s(scaledrect.size());
+                    if(i->valid_rect().size() == TQSize( intrinsicWidth(), intrinsicHeight() )) // fully loaded
+                        s = TQSize(cWidth, cHeight);
+                    if(kAbs(s.width() - cWidth) < 2) // rounding errors
+                        s.setWidth(cWidth);
+                    if(resizeCache.size() != s)
+                        resizeCache.resize(s);
+                }
 
                 paintInfo.p->drawPixmap( TQPoint( _tx + leftBorder + leftPad, _ty + topBorder + topPad),
                                resizeCache, scaledrect );