Code

A simple layout document as to what, why and how is cppification.
[inkscape.git] / src / trace / trace.cpp
index 81ccb64fae545a7066b1631b08a93e1980b8629f..cff464e9f1fba1c57e71fd953c17eced7f9a59f5 100644 (file)
@@ -1,4 +1,4 @@
-/*
+/**
  * A generic interface for plugging different
  *  autotracers into Inkscape.
  *
@@ -19,6 +19,7 @@
 #include <desktop-handles.h>
 #include <document.h>
 #include <message-stack.h>
+#include <gtkmm.h>
 #include <glibmm/i18n.h>
 #include <selection.h>
 #include <xml/repr.h>
@@ -26,6 +27,8 @@
 #include <sp-item.h>
 #include <sp-shape.h>
 #include <sp-image.h>
+#include <libnr/nr-matrix-ops.h>
+#include <2geom/transforms.h>
 
 #include <display/nr-arena.h>
 #include <display/nr-arena-shape.h>
 #include "siox.h"
 #include "imagemap-gdk.h"
 
-namespace Inkscape {
 
-namespace Trace {
 
+namespace Inkscape
+{
+
+namespace Trace
+{
 
 
 
 
 
 /**
- *
+ * Get the selected image.  Also check for any SPItems over it, in
+ * case the user wants SIOX pre-processing.
  */
 SPImage *
 Tracer::getSelectedSPImage()
 {
+
     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
     if (!desktop)
         {
-        g_warning("Trace: No active desktop\n");
+        g_warning("Trace: No active desktop");
         return NULL;
         }
 
+    Inkscape::MessageStack *msgStack = sp_desktop_message_stack(desktop);
+
     Inkscape::Selection *sel = sp_desktop_selection(desktop);
     if (!sel)
         {
         char *msg = _("Select an <b>image</b> to trace");
-        sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+        msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
         //g_warning(msg);
         return NULL;
         }
@@ -94,7 +104,7 @@ Tracer::getSelectedSPImage()
                 if (img) //we want only one
                     {
                     char *msg = _("Select only one <b>image</b> to trace");
-                    sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+                    msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
                     return NULL;
                     }
                 img = SP_IMAGE(item);
@@ -112,7 +122,7 @@ Tracer::getSelectedSPImage()
         if (!img || sioxShapes.size() < 1)
             {
             char *msg = _("Select one image and one or more shapes above it");
-            sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+            msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
             return NULL;
             }
         return img;
@@ -124,7 +134,7 @@ Tracer::getSelectedSPImage()
         if (!item)
             {
             char *msg = _("Select an <b>image</b> to trace");  //same as above
-            sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+            msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
             //g_warning(msg);
             return NULL;
             }
@@ -132,7 +142,7 @@ Tracer::getSelectedSPImage()
         if (!SP_IS_IMAGE(item))
             {
             char *msg = _("Select an <b>image</b> to trace");
-            sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+            msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
             //g_warning(msg);
             return NULL;
             }
@@ -146,98 +156,137 @@ Tracer::getSelectedSPImage()
 
 
 
-/**
- *
- */
-GdkPixbuf *
-Tracer::getSelectedImage()
+typedef org::siox::SioxImage SioxImage;
+typedef org::siox::SioxObserver SioxObserver;
+typedef org::siox::Siox Siox;
+
+
+class TraceSioxObserver : public SioxObserver
 {
+public:
+
+    /**
+     *
+     */
+    TraceSioxObserver (void *contextArg) :
+                     SioxObserver(contextArg)
+        {}
+
+    /**
+     *
+     */
+    virtual ~TraceSioxObserver ()
+        { }
+
+    /**
+     *  Informs the observer how much has been completed.
+     *  Return false if the processing should be aborted.
+     */
+    virtual bool progress(float /*percentCompleted*/)
+        {
+        //Tracer *tracer = (Tracer *)context;
+        //## Allow the GUI to update
+        Gtk::Main::iteration(false); //at least once, non-blocking
+        while( Gtk::Main::events_pending() )
+            Gtk::Main::iteration();
+        return true;
+        }
 
-    SPImage *img = getSelectedSPImage();
-    if (!img)
-        return NULL;
+    /**
+     *  Send an error string to the Observer.  Processing will
+     *  be halted.
+     */
+    virtual void error(const std::string &/*msg*/)
+        {
+        //Tracer *tracer = (Tracer *)context;
+        }
+
+
+};
 
-    GdkPixbuf *pixbuf = img->pixbuf;
 
-    return pixbuf;
 
-}
 
 
-GdkPixbuf *
-Tracer::sioxProcessImage(SPImage *img, GdkPixbuf *origPixbuf)
+/**
+ * Process a GdkPixbuf, according to which areas have been
+ * obscured in the GUI.
+ */
+Glib::RefPtr<Gdk::Pixbuf>
+Tracer::sioxProcessImage(SPImage *img,
+             Glib::RefPtr<Gdk::Pixbuf>origPixbuf)
 {
+    if (!sioxEnabled)
+        return origPixbuf;
+
+    if (origPixbuf == lastOrigPixbuf)
+        return lastSioxPixbuf;
+
+    //g_message("siox: start");
 
     //Convert from gdk, so a format we know.  By design, the pixel
     //format in PackedPixelMap is identical to what is needed by SIOX
-    PackedPixelMap *ppMap = gdkPixbufToPackedPixelMap(origPixbuf);
-    //We need to create two things:
-    //  1.  An array of long pixel values of ARGB
-    //  2.  A matching array of per-pixel float 'confidence' values
-    unsigned long *imgBuf = ppMap->pixels;
-    float *confidenceMatrix = new float[ppMap->width * ppMap->height];
+    SioxImage simage(origPixbuf->gobj());
 
     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
     if (!desktop)
         {
-        g_warning("Trace: No active desktop\n");
-        return NULL;
+        g_warning(_("Trace: No active desktop"));
+        return Glib::RefPtr<Gdk::Pixbuf>(NULL);
         }
 
+    Inkscape::MessageStack *msgStack = sp_desktop_message_stack(desktop);
+
     Inkscape::Selection *sel = sp_desktop_selection(desktop);
     if (!sel)
         {
         char *msg = _("Select an <b>image</b> to trace");
-        sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+        msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
         //g_warning(msg);
-        return NULL;
+        return Glib::RefPtr<Gdk::Pixbuf>(NULL);
         }
 
-    NRArenaItem *aImg = sp_item_get_arenaitem(img, desktop->dkey);
+    NRArenaItem *aImg = img->get_arenaitem(desktop->dkey);
     //g_message("img: %d %d %d %d\n", aImg->bbox.x0, aImg->bbox.y0,
     //                                aImg->bbox.x1, aImg->bbox.y1);
 
     double width  = (double)(aImg->bbox.x1 - aImg->bbox.x0);
     double height = (double)(aImg->bbox.y1 - aImg->bbox.y0);
 
-    double iwidth  = (double)ppMap->width;
-    double iheight = (double)ppMap->height;
+    double iwidth  = (double)simage.getWidth();
+    double iheight = (double)simage.getHeight();
 
     double iwscale = width  / iwidth;
     double ihscale = height / iheight;
 
-    unsigned long cmIndex = 0;
-
-
     std::vector<NRArenaItem *> arenaItems;
     std::vector<SPShape *>::iterator iter;
     for (iter = sioxShapes.begin() ; iter!=sioxShapes.end() ; iter++)
         {
         SPItem *item = *iter;
-        //### Create ArenaItems and set transform
-        NRArenaItem *aItem = sp_item_get_arenaitem(item, desktop->dkey);
-
-        //nr_arena_item_set_transform(aItem, item->transform);
-        //g_message("%d %d %d %d\n", aItem->bbox.x0, aItem->bbox.y0,
-        //                           aItem->bbox.x1, aItem->bbox.y1);
+        NRArenaItem *aItem = item->get_arenaitem(desktop->dkey);
         arenaItems.push_back(aItem);
         }
+
     //g_message("%d arena items\n", arenaItems.size());
 
-    PackedPixelMap *dumpMap = PackedPixelMapCreate(ppMap->width, ppMap->height);
+    //PackedPixelMap *dumpMap = PackedPixelMapCreate(
+    //                simage.getWidth(), simage.getHeight());
 
-    for (int row=0 ; row<ppMap->height ; row++)
+    //g_message("siox: start selection");
+
+    for (int row=0 ; row<iheight ; row++)
         {
         double ypos = ((double)aImg->bbox.y0) + ihscale * (double) row;
-        for (int col=0 ; col<ppMap->width ; col++)
+        for (int col=0 ; col<simage.getWidth() ; col++)
             {
             //Get absolute X,Y position
             double xpos = ((double)aImg->bbox.x0) + iwscale * (double)col;
-            NR::Point point(xpos, ypos);
-            point *= aImg->transform;
+            Geom::Point point(xpos, ypos);
+            if (aImg->transform)
+                point *= *aImg->transform;
             //point *= imgMat;
             //point = desktop->doc2dt(point);
-            std::vector<SPShape *>::iterator iter;
             //g_message("x:%f    y:%f\n", point[0], point[1]);
             bool weHaveAHit = false;
             std::vector<NRArenaItem *>::iterator aIter;
@@ -256,27 +305,37 @@ Tracer::sioxProcessImage(SPImage *img, GdkPixbuf *origPixbuf)
             if (weHaveAHit)
                 {
                 //g_message("hit!\n");
-                dumpMap->setPixelLong(dumpMap, col, row, 0L);
-                confidenceMatrix[cmIndex] =
-                        org::siox::SioxSegmentator::CERTAIN_FOREGROUND_CONFIDENCE;
+                //dumpMap->setPixelLong(dumpMap, col, row, 0L);
+                simage.setConfidence(col, row,
+                        Siox::UNKNOWN_REGION_CONFIDENCE);
                 }
             else
                 {
-                dumpMap->setPixelLong(dumpMap, col, row,
-                        ppMap->getPixel(ppMap, col, row));
-                confidenceMatrix[cmIndex] =
-                        org::siox::SioxSegmentator::CERTAIN_BACKGROUND_CONFIDENCE;
+                //g_message("miss!\n");
+                //dumpMap->setPixelLong(dumpMap, col, row,
+                //        simage.getPixel(col, row));
+                simage.setConfidence(col, row,
+                        Siox::CERTAIN_BACKGROUND_CONFIDENCE);
                 }
-            cmIndex++;
             }
         }
 
+    //g_message("siox: selection done");
+
+    //dumpMap->writePPM(dumpMap, "siox1.ppm");
+    //dumpMap->destroy(dumpMap);
+
     //## ok we have our pixel buf
-    org::siox::SioxSegmentator ss(ppMap->width, ppMap->height, NULL, 0);
-    ss.segmentate(imgBuf, confidenceMatrix, 0, 0.0);
+    TraceSioxObserver observer(this);
+    Siox sengine(&observer);
+    SioxImage result = sengine.extractForeground(simage, 0xffffff);
+    if (!result.isValid())
+        {
+        g_warning(_("Invalid SIOX result"));
+        return Glib::RefPtr<Gdk::Pixbuf>(NULL);
+        }
 
-    dumpMap->writePPM(dumpMap, "siox.ppm");
-    dumpMap->destroy(dumpMap);
+    //result.writePPM("siox2.ppm");
 
     /* Free Arena and ArenaItem */
     /*
@@ -289,14 +348,54 @@ Tracer::sioxProcessImage(SPImage *img, GdkPixbuf *origPixbuf)
     nr_object_unref((NRObject *) arena);
     */
 
-    GdkPixbuf *newPixbuf = packedPixelMapToGdkPixbuf(ppMap);
-    ppMap->destroy(ppMap);
-    delete confidenceMatrix;
+    Glib::RefPtr<Gdk::Pixbuf> newPixbuf = Glib::wrap(result.getGdkPixbuf());
+
+    //g_message("siox: done");
+
+    lastSioxPixbuf = newPixbuf;
 
     return newPixbuf;
 }
 
 
+/**
+ *
+ */
+Glib::RefPtr<Gdk::Pixbuf>
+Tracer::getSelectedImage()
+{
+
+
+    SPImage *img = getSelectedSPImage();
+    if (!img)
+        return Glib::RefPtr<Gdk::Pixbuf>(NULL);
+
+    if (!img->pixbuf)
+        return Glib::RefPtr<Gdk::Pixbuf>(NULL);
+
+    Glib::RefPtr<Gdk::Pixbuf> pixbuf =
+          Glib::wrap(img->pixbuf, true);
+
+    if (sioxEnabled)
+        {
+        Glib::RefPtr<Gdk::Pixbuf> sioxPixbuf =
+             sioxProcessImage(img, pixbuf);
+        if (!sioxPixbuf)
+            {
+            return pixbuf;
+            }
+        else
+            {
+            return sioxPixbuf;
+            }
+        }
+    else
+        {
+        return pixbuf;
+        }
+
+}
+
 
 
 //#########################################################################
@@ -331,18 +430,20 @@ void Tracer::traceThread()
         return;
         }
 
+    Inkscape::MessageStack *msgStack = sp_desktop_message_stack(desktop);
+
     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 
     if (!SP_ACTIVE_DOCUMENT)
         {
         char *msg = _("Trace: No active document");
-        sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+        msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
         //g_warning(msg);
         engine = NULL;
         return;
         }
     SPDocument *doc = SP_ACTIVE_DOCUMENT;
-    sp_document_ensure_up_to_date(doc);
+    doc->ensure_up_to_date();
 
 
     SPImage *img = getSelectedSPImage();
@@ -352,44 +453,37 @@ void Tracer::traceThread()
         return;
         }
 
-    GdkPixbuf *pixbuf = img->pixbuf;
+    Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(img->pixbuf, true);
+
+    pixbuf = sioxProcessImage(img, pixbuf);
 
     if (!pixbuf)
         {
         char *msg = _("Trace: Image has no bitmap data");
-        sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, msg);
+        msgStack->flash(Inkscape::ERROR_MESSAGE, msg);
         //g_warning(msg);
         engine = NULL;
         return;
         }
 
-    //## SIOX pre-processing to get a smart subimage of the pixbuf.
-    //## This is done before any other filters
-    if (sioxEnabled)
-        {
-        /*
-           Ok, we have requested siox, and getSelectedSPImage() has found a single
-           bitmap and one or more SPItems above it.  Now what we need to do is create
-           a siox-segmented subimage pixbuf.  We not need alter 'img' at all, since this
-           pixbuf will be the same dimensions and at the same location.
-           Remember to free this new pixbuf later.
-        */
-        pixbuf = sioxProcessImage(img, pixbuf);
-        }
+    msgStack->flash(Inkscape::NORMAL_MESSAGE, _("Trace: Starting trace..."));
+    desktop->updateCanvasNow();
 
-    int nrPaths;
-    TracingEngineResult *results = engine->trace(pixbuf, &nrPaths);
-    //printf("nrPaths:%d\n", nrPaths);
+    std::vector<TracingEngineResult> results =
+                engine->trace(pixbuf);
+    //printf("nrPaths:%d\n", results.size());
+    int nrPaths = results.size();
 
     //### Check if we should stop
-    if (!keepGoing || !results || nrPaths<1)
+    if (!keepGoing || nrPaths<1)
         {
         engine = NULL;
         return;
         }
 
     //### Get pointers to the <image> and its parent
-    Inkscape::XML::Node *imgRepr   = SP_OBJECT(img)->repr;
+       //XML Tree being used directly here while it shouldn't be.
+    Inkscape::XML::Node *imgRepr   = SP_OBJECT(img)->getRepr();
     Inkscape::XML::Node *par       = sp_repr_parent(imgRepr);
 
     //### Get some information for the new transform()
@@ -409,43 +503,42 @@ void Tracer::traceThread()
     if (sp_repr_get_double(imgRepr, "height", &dval))
         height = dval;
 
-    NR::Matrix trans(NR::translate(x, y));
-
-    double iwidth  = (double)gdk_pixbuf_get_width(pixbuf);
-    double iheight = (double)gdk_pixbuf_get_height(pixbuf);
+    double iwidth  = (double)pixbuf->get_width();
+    double iheight = (double)pixbuf->get_height();
 
     double iwscale = width  / iwidth;
     double ihscale = height / iheight;
 
-    NR::Matrix scal(NR::scale(iwscale, ihscale));
+    Geom::Translate trans(x, y);
+    Geom::Scale scal(iwscale, ihscale);
 
     //# Convolve scale, translation, and the original transform
-    NR::Matrix tf(scal);
-    tf *= trans;
+    Geom::Matrix tf(scal * trans);
     tf *= img->transform;
 
 
     //#OK.  Now let's start making new nodes
 
+    Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
     Inkscape::XML::Node *groupRepr = NULL;
 
     //# if more than 1, make a <g>roup of <path>s
     if (nrPaths > 1)
         {
-        groupRepr = sp_repr_new("svg:g");
+        groupRepr = xml_doc->createElement("svg:g");
         par->addChild(groupRepr, imgRepr);
         }
 
     long totalNodeCount = 0L;
 
-    for (TracingEngineResult *result=results ;
-                  result ; result=result->next)
+    for (unsigned int i=0 ; i<results.size() ; i++)
         {
-        totalNodeCount += result->getNodeCount();
+        TracingEngineResult result = results[i];
+        totalNodeCount += result.getNodeCount();
 
-        Inkscape::XML::Node *pathRepr = sp_repr_new("svg:path");
-        pathRepr->setAttribute("style", result->getStyle());
-        pathRepr->setAttribute("d",     result->getPathData());
+        Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
+        pathRepr->setAttribute("style", result.getStyle().c_str());
+        pathRepr->setAttribute("d",     result.getPathData().c_str());
 
         if (nrPaths > 1)
             groupRepr->addChild(pathRepr, NULL);
@@ -457,7 +550,7 @@ void Tracer::traceThread()
         if (reprobj)
             {
             SPItem *newItem = SP_ITEM(reprobj);
-            sp_item_write_transform(newItem, pathRepr, tf, NULL);
+            newItem->doWriteTransform(pathRepr, tf, NULL);
             }
         if (nrPaths == 1)
             {
@@ -467,14 +560,6 @@ void Tracer::traceThread()
         Inkscape::GC::release(pathRepr);
         }
 
-    //did we allocate a pixbuf copy?
-    if (sioxEnabled)
-        {
-        g_free(pixbuf);
-        }
-
-    delete results;
-
     // If we have a group, then focus on, then forget it
     if (nrPaths > 1)
         {
@@ -484,12 +569,12 @@ void Tracer::traceThread()
         }
 
     //## inform the document, so we can undo
-    sp_document_done(doc);
+    SPDocumentUndo::done(doc, SP_VERB_SELECTION_TRACE, _("Trace bitmap"));
 
     engine = NULL;
 
     char *msg = g_strdup_printf(_("Trace: Done. %ld nodes created"), totalNodeCount);
-    sp_desktop_message_stack(desktop)->flash(Inkscape::NORMAL_MESSAGE, msg);
+    msgStack->flash(Inkscape::NORMAL_MESSAGE, msg);
     g_free(msg);
 
 }