Move classes derived from SPObject to own directory.

A lot of header clean-up.

1 files changed, 805 insertions, 0 deletions

diff --git a/src/object/sp-image.cpp b/src/object/sp-image.cpp
new file mode 100644
index 000000000..6736efdec
--- /dev/null
+++ b/src/object/sp-image.cpp
@@ -0,0 +1,805 @@
+/*
+ * SVG <image> implementation
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Edward Flick (EAF)
+ *   Abhishek Sharma
+ *   Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 1999-2005 Authors
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <cstring>
+#include <algorithm>
+#include <string>
+#include <glibmm.h>
+#include <glib/gstdio.h>
+#include <2geom/rect.h>
+#include <2geom/transforms.h>
+#include <glibmm/i18n.h>
+
+#include "display/drawing-image.h"
+#include "display/cairo-utils.h"
+#include "display/curve.h"
+//Added for preserveAspectRatio support -- EAF
+#include "attributes.h"
+#include "print.h"
+#include "brokenimage.xpm"
+#include "document.h"
+#include "sp-image.h"
+#include "sp-clippath.h"
+#include "xml/quote.h"
+#include "preferences.h"
+#include "io/sys.h"
+
+#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+#include "cms-system.h"
+#include "color-profile.h"
+
+#if HAVE_LIBLCMS2
+#  include <lcms2.h>
+#elif HAVE_LIBLCMS1
+#  include <lcms.h>
+#endif // HAVE_LIBLCMS2
+
+//#define DEBUG_LCMS
+#ifdef DEBUG_LCMS
+#define DEBUG_MESSAGE(key, ...)\
+{\
+    g_message( __VA_ARGS__ );\
+}
+#include <gtk/gtk.h>
+#else
+#define DEBUG_MESSAGE(key, ...)
+#endif // DEBUG_LCMS
+#endif // defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+/*
+ * SPImage
+ */
+
+// TODO: give these constants better names:
+#define MAGIC_EPSILON 1e-9
+#define MAGIC_EPSILON_TOO 1e-18
+// TODO: also check if it is correct to be using two different epsilon values
+
+static void sp_image_set_curve(SPImage *image);
+
+static Inkscape::Pixbuf *sp_image_repr_read_image(gchar const *href, gchar const *absref, gchar const *base );
+static void sp_image_update_arenaitem (SPImage *img, Inkscape::DrawingImage *ai);
+static void sp_image_update_canvas_image (SPImage *image);
+
+#ifdef DEBUG_LCMS
+extern guint update_in_progress;
+#define DEBUG_MESSAGE_SCISLAC(key, ...) \
+{\
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();\
+    bool dump = prefs->getBool("/options/scislac/" #key);\
+    bool dumpD = prefs->getBool("/options/scislac/" #key "D");\
+    bool dumpD2 = prefs->getBool("/options/scislac/" #key "D2");\
+    dumpD &&= ( (update_in_progress == 0) || dumpD2 );\
+    if ( dump )\
+    {\
+        g_message( __VA_ARGS__ );\
+\
+    }\
+    if ( dumpD )\
+    {\
+        GtkWidget *dialog = gtk_message_dialog_new(NULL,\
+                                                   GTK_DIALOG_DESTROY_WITH_PARENT, \
+                                                   GTK_MESSAGE_INFO,    \
+                                                   GTK_BUTTONS_OK,      \
+                                                   __VA_ARGS__          \
+                                                   );\
+        g_signal_connect_swapped(dialog, "response",\
+                                 G_CALLBACK(gtk_widget_destroy),        \
+                                 dialog);                               \
+        gtk_widget_show_all( dialog );\
+    }\
+}
+#else // DEBUG_LCMS
+#define DEBUG_MESSAGE_SCISLAC(key, ...)
+#endif // DEBUG_LCMS
+
+SPImage::SPImage() : SPItem(), SPViewBox() {
+
+    this->x.unset();
+    this->y.unset();
+    this->width.unset();
+    this->height.unset();
+    this->clipbox = Geom::Rect();
+    this->sx = this->sy = 1.0;
+    this->ox = this->oy = 0.0;
+
+    this->curve = NULL;
+
+    this->href = 0;
+#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+    this->color_profile = 0;
+#endif // defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+    this->pixbuf = 0;
+}
+
+SPImage::~SPImage() {
+}
+
+void SPImage::build(SPDocument *document, Inkscape::XML::Node *repr) {
+    SPItem::build(document, repr);
+
+    this->readAttr( "xlink:href" );
+    this->readAttr( "x" );
+    this->readAttr( "y" );
+    this->readAttr( "width" );
+    this->readAttr( "height" );
+    this->readAttr( "preserveAspectRatio" );
+    this->readAttr( "color-profile" );
+
+    /* Register */
+    document->addResource("image", this);
+}
+
+void SPImage::release() {
+    if (this->document) {
+        // Unregister ourselves
+        this->document->removeResource("image", this);
+    }
+
+    if (this->href) {
+        g_free (this->href);
+        this->href = NULL;
+    }
+
+    delete this->pixbuf;
+    this->pixbuf = NULL;
+
+#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+    if (this->color_profile) {
+        g_free (this->color_profile);
+        this->color_profile = NULL;
+    }
+#endif // defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+
+    if (this->curve) {
+        this->curve = this->curve->unref();
+    }
+
+    SPItem::release();
+}
+
+void SPImage::set(unsigned int key, const gchar* value) {
+    switch (key) {
+        case SP_ATTR_XLINK_HREF:
+            g_free (this->href);
+            this->href = (value) ? g_strdup (value) : NULL;
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_X:
+            /* ex, em not handled correctly. */
+            if (!this->x.read(value)) {
+                this->x.unset();
+            }
+
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_Y:
+            /* ex, em not handled correctly. */
+            if (!this->y.read(value)) {
+                this->y.unset();
+            }
+
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_WIDTH:
+            /* ex, em not handled correctly. */
+            if (!this->width.read(value)) {
+                this->width.unset();
+            }
+
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_HEIGHT:
+            /* ex, em not handled correctly. */
+            if (!this->height.read(value)) {
+                this->height.unset();
+            }
+
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SP_ATTR_PRESERVEASPECTRATIO:
+            set_preserveAspectRatio( value );
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
+            break;
+
+#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+        case SP_PROP_COLOR_PROFILE:
+            if ( this->color_profile ) {
+                g_free (this->color_profile);
+            }
+
+            this->color_profile = (value) ? g_strdup (value) : NULL;
+
+            if ( value ) {
+                DEBUG_MESSAGE( lcmsFour, "<this> color-profile set to '%s'", value );
+            } else {
+                DEBUG_MESSAGE( lcmsFour, "<this> color-profile cleared" );
+            }
+
+            // TODO check on this HREF_MODIFIED flag
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG);
+            break;
+
+#endif // defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+
+        default:
+            SPItem::set(key, value);
+            break;
+    }
+
+    sp_image_set_curve(this); //creates a curve at the image's boundary for snapping
+}
+
+// BLIP
+#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+void SPImage::apply_profile(Inkscape::Pixbuf *pixbuf) {
+
+    // TODO: this will prevent using MIME data when exporting.
+    // Integrate color correction into loading.
+    pixbuf->ensurePixelFormat(Inkscape::Pixbuf::PF_GDK);
+    int imagewidth = pixbuf->width();
+    int imageheight = pixbuf->height();
+    int rowstride = pixbuf->rowstride();;
+    guchar* px = pixbuf->pixels();
+
+    if ( px ) {
+        DEBUG_MESSAGE( lcmsFive, "in <image>'s sp_image_update. About to call colorprofile_get_handle()" );
+
+        guint profIntent = Inkscape::RENDERING_INTENT_UNKNOWN;
+        cmsHPROFILE prof = Inkscape::CMSSystem::getHandle( this->document,
+                                                           &profIntent,
+                                                           this->color_profile );
+        if ( prof ) {
+            cmsProfileClassSignature profileClass = cmsGetDeviceClass( prof );
+            if ( profileClass != cmsSigNamedColorClass ) {
+                int intent = INTENT_PERCEPTUAL;
+                                
+                switch ( profIntent ) {
+                    case Inkscape::RENDERING_INTENT_RELATIVE_COLORIMETRIC:
+                        intent = INTENT_RELATIVE_COLORIMETRIC;
+                        break;
+                    case Inkscape::RENDERING_INTENT_SATURATION:
+                        intent = INTENT_SATURATION;
+                        break;
+                    case Inkscape::RENDERING_INTENT_ABSOLUTE_COLORIMETRIC:
+                        intent = INTENT_ABSOLUTE_COLORIMETRIC;
+                        break;
+                    case Inkscape::RENDERING_INTENT_PERCEPTUAL:
+                    case Inkscape::RENDERING_INTENT_UNKNOWN:
+                    case Inkscape::RENDERING_INTENT_AUTO:
+                    default:
+                        intent = INTENT_PERCEPTUAL;
+                }
+                                
+                cmsHPROFILE destProf = cmsCreate_sRGBProfile();
+                cmsHTRANSFORM transf = cmsCreateTransform( prof,
+                                                           TYPE_RGBA_8,
+                                                           destProf,
+                                                           TYPE_RGBA_8,
+                                                           intent, 0 );
+                if ( transf ) {
+                    guchar* currLine = px;
+                    for ( int y = 0; y < imageheight; y++ ) {
+                        // Since the types are the same size, we can do the transformation in-place
+                        cmsDoTransform( transf, currLine, currLine, imagewidth );
+                        currLine += rowstride;
+                    }
+
+                    cmsDeleteTransform( transf );
+                } else {
+                    DEBUG_MESSAGE( lcmsSix, "in <image>'s sp_image_update. Unable to create LCMS transform." );
+                }
+
+                cmsCloseProfile( destProf );
+            } else {
+                DEBUG_MESSAGE( lcmsSeven, "in <image>'s sp_image_update. Profile type is named color. Can't transform." );
+            }
+        } else {
+            DEBUG_MESSAGE( lcmsEight, "in <image>'s sp_image_update. No profile found." );
+        }
+    }
+}
+#endif // defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+
+void SPImage::update(SPCtx *ctx, unsigned int flags) {
+
+    SPDocument *doc = this->document;
+
+    SPItem::update(ctx, flags);
+
+    if (flags & SP_IMAGE_HREF_MODIFIED_FLAG) {
+        delete this->pixbuf;
+        this->pixbuf = NULL;
+
+        if (this->href) {
+            Inkscape::Pixbuf *pixbuf = NULL;
+            pixbuf = sp_image_repr_read_image (
+                this->getRepr()->attribute("xlink:href"),
+                this->getRepr()->attribute("sodipodi:absref"),
+                doc->getBase());
+            
+            if (pixbuf) {
+#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+                if ( this->color_profile ) apply_profile( pixbuf );
+#endif
+                this->pixbuf = pixbuf;
+            }
+        }
+    }
+
+    SPItemCtx *ictx = (SPItemCtx *) ctx;
+
+    // Why continue without a pixbuf? So we can display "Missing Image" png.
+    // Eventually, we should properly support SVG image type (i.e. render it ourselves).
+
+    if (this->pixbuf) {
+        if (!this->x._set) {
+            this->x.unit = SVGLength::PX;
+            this->x.computed = 0;
+        }
+
+        if (!this->y._set) {
+            this->y.unit = SVGLength::PX;
+            this->y.computed = 0;
+        }
+
+        if (!this->width._set) {
+            this->width.unit = SVGLength::PX;
+            this->width.computed = this->pixbuf->width();
+        }
+
+        if (!this->height._set) {
+            this->height.unit = SVGLength::PX;
+            this->height.computed = this->pixbuf->height();
+        }
+    }
+
+    // Calculate x, y, width, height from parent/initial viewport, see sp-root.cpp
+    this->calcDimsFromParentViewport(ictx);
+
+    // Image creates a new viewport
+    ictx->viewport= Geom::Rect::from_xywh( this->x.computed, this->y.computed,
+                                           this->width.computed, this->height.computed);
+ 
+    this->clipbox = ictx->viewport;
+
+    this->ox = this->x.computed;
+    this->oy = this->y.computed;
+
+    if (this->pixbuf) {
+
+        // Viewbox is either from SVG (not supported) or dimensions of pixbuf (PNG, JPG)
+        this->viewBox = Geom::Rect::from_xywh(0, 0, this->pixbuf->width(), this->pixbuf->height()); 
+        this->viewBox_set = true;
+
+        // SPItemCtx rctx =
+        get_rctx( ictx );
+
+        this->ox = c2p[4];
+        this->oy = c2p[5];
+        this->sx = c2p[0];
+        this->sy = c2p[3];
+    }
+
+    // TODO: eliminate ox, oy, sx, sy
+    sp_image_update_canvas_image ((SPImage *) this);
+}
+
+void SPImage::modified(unsigned int flags) {
+//  SPItem::onModified(flags);
+
+    if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
+        for (SPItemView *v = this->display; v != NULL; v = v->next) {
+            Inkscape::DrawingImage *img = dynamic_cast<Inkscape::DrawingImage *>(v->arenaitem);
+            img->setStyle(this->style);
+        }
+    }
+}
+
+
+Inkscape::XML::Node *SPImage::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags ) {
+    if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+        repr = xml_doc->createElement("svg:image");
+    }
+
+    repr->setAttribute("xlink:href", this->href);
+
+    /* fixme: Reset attribute if needed (Lauris) */
+    if (this->x._set) {
+        sp_repr_set_svg_double(repr, "x", this->x.computed);
+    }
+
+    if (this->y._set) {
+        sp_repr_set_svg_double(repr, "y", this->y.computed);
+    }
+
+    if (this->width._set) {
+        sp_repr_set_svg_double(repr, "width", this->width.computed);
+    }
+
+    if (this->height._set) {
+        sp_repr_set_svg_double(repr, "height", this->height.computed);
+    }
+
+    //XML Tree being used directly here while it shouldn't be...
+    repr->setAttribute("preserveAspectRatio", this->getRepr()->attribute("preserveAspectRatio"));
+#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+    if (this->color_profile) {
+        repr->setAttribute("color-profile", this->color_profile);
+    }
+#endif // defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
+
+    SPItem::write(xml_doc, repr, flags);
+
+    return repr;
+}
+
+Geom::OptRect SPImage::bbox(Geom::Affine const &transform, SPItem::BBoxType /*type*/) const {
+    Geom::OptRect bbox;
+
+    if ((this->width.computed > 0.0) && (this->height.computed > 0.0)) {
+        bbox = Geom::Rect::from_xywh(this->x.computed, this->y.computed, this->width.computed, this->height.computed);
+        *bbox *= transform;
+    }
+
+    return bbox;
+}
+
+void SPImage::print(SPPrintContext *ctx) {
+    if (this->pixbuf && (this->width.computed > 0.0) && (this->height.computed > 0.0) ) {
+        Inkscape::Pixbuf *pb = new Inkscape::Pixbuf(*this->pixbuf);
+        pb->ensurePixelFormat(Inkscape::Pixbuf::PF_GDK);
+
+        guchar *px = pb->pixels();
+        int w = pb->width();
+        int h = pb->height();
+        int rs = pb->rowstride();
+
+        double vx = this->ox;
+        double vy = this->oy;
+
+        Geom::Affine t;
+        Geom::Translate tp(vx, vy);
+        Geom::Scale s(this->sx, this->sy);
+        t = s * tp;
+        sp_print_image_R8G8B8A8_N(ctx, px, w, h, rs, t, this->style);
+        delete pb;
+    }
+}
+
+const char* SPImage::displayName() const {
+    return _("Image");
+}
+
+gchar* SPImage::description() const {
+    char *href_desc;
+
+    if (this->href) {
+        href_desc = (strncmp(this->href, "data:", 5) == 0)
+            ? g_strdup(_("embedded"))
+            : xml_quote_strdup(this->href);
+    } else {
+        g_warning("Attempting to call strncmp() with a null pointer.");
+        href_desc = g_strdup("(null_pointer)"); // we call g_free() on href_desc
+    }
+
+    char *ret = ( this->pixbuf == NULL
+                  ? g_strdup_printf(_("[bad reference]: %s"), href_desc)
+                  : g_strdup_printf(_("%d &#215; %d: %s"),
+                                    this->pixbuf->width(),
+                                    this->pixbuf->height(),
+                                    href_desc) );
+    g_free(href_desc);
+    return ret;
+}
+
+Inkscape::DrawingItem* SPImage::show(Inkscape::Drawing &drawing, unsigned int /*key*/, unsigned int /*flags*/) {
+    Inkscape::DrawingImage *ai = new Inkscape::DrawingImage(drawing);
+
+    sp_image_update_arenaitem(this, ai);
+
+    return ai;
+}
+
+Inkscape::Pixbuf *sp_image_repr_read_image(gchar const *href, gchar const *absref, gchar const *base)
+{
+    Inkscape::Pixbuf *inkpb = 0;
+
+    gchar const *filename = href;
+    
+    if (filename != NULL) {
+        if (strncmp (filename,"file:",5) == 0) {
+            gchar *fullname = g_filename_from_uri(filename, NULL, NULL);
+            if (fullname) {
+                inkpb = Inkscape::Pixbuf::create_from_file(fullname);
+                g_free(fullname);
+                if (inkpb != NULL) {
+                    return inkpb;
+                }
+            }
+        } else if (strncmp (filename,"data:",5) == 0) {
+            /* data URI - embedded image */
+            filename += 5;
+            inkpb = Inkscape::Pixbuf::create_from_data_uri(filename);
+            if (inkpb != NULL) {
+                return inkpb;
+            }
+        } else {
+
+            if (!g_path_is_absolute (filename)) {
+                /* try to load from relative pos combined with document base*/
+                const gchar *docbase = base;
+                if (!docbase) {
+                    docbase = ".";
+                }
+                gchar *fullname = g_build_filename(docbase, filename, NULL);
+
+                // document base can be wrong (on the temporary doc when importing bitmap from a
+                // different dir) or unset (when doc is not saved yet), so we check for base+href existence first,
+                // and if it fails, we also try to use bare href regardless of its g_path_is_absolute
+                if (g_file_test (fullname, G_FILE_TEST_EXISTS) && !g_file_test (fullname, G_FILE_TEST_IS_DIR)) {
+                    inkpb = Inkscape::Pixbuf::create_from_file(fullname);
+                    if (inkpb != NULL) {
+                        g_free (fullname);
+                        return inkpb;
+                    }
+                }
+                g_free (fullname);
+            }
+
+            /* try filename as absolute */
+            if (g_file_test (filename, G_FILE_TEST_EXISTS) && !g_file_test (filename, G_FILE_TEST_IS_DIR)) {
+                inkpb = Inkscape::Pixbuf::create_from_file(filename);
+                if (inkpb != NULL) {
+                    return inkpb;
+                }
+            }
+        }
+    }
+
+    /* at last try to load from sp absolute path name */
+    filename = absref;
+    if (filename != NULL) {
+        // using absref is outside of SVG rules, so we must at least warn the user
+        if ( base != NULL && href != NULL ) {
+            g_warning ("<image xlink:href=\"%s\"> did not resolve to a valid image file (base dir is %s), now trying sodipodi:absref=\"%s\"", href, base, absref);
+        } else {
+            g_warning ("xlink:href did not resolve to a valid image file, now trying sodipodi:absref=\"%s\"", absref);
+        }
+
+        inkpb = Inkscape::Pixbuf::create_from_file(filename);
+        if (inkpb != NULL) {
+            return inkpb;
+        }
+    }
+    /* Nope: We do not find any valid pixmap file :-( */
+    GdkPixbuf *pixbuf = gdk_pixbuf_new_from_xpm_data((const gchar **) brokenimage_xpm);
+    inkpb = new Inkscape::Pixbuf(pixbuf);
+
+    /* It should be included xpm, so if it still does not does load, */
+    /* our libraries are broken */
+    g_assert (inkpb != NULL);
+
+    return inkpb;
+}
+
+/* We assert that realpixbuf is either NULL or identical size to pixbuf */
+static void
+sp_image_update_arenaitem (SPImage *image, Inkscape::DrawingImage *ai)
+{
+    ai->setStyle(SP_OBJECT(image)->style);
+    ai->setPixbuf(image->pixbuf);
+    ai->setOrigin(Geom::Point(image->ox, image->oy));
+    ai->setScale(image->sx, image->sy);
+    ai->setClipbox(image->clipbox);
+}
+
+static void sp_image_update_canvas_image(SPImage *image)
+{
+    SPItem *item = SP_ITEM(image);
+
+    for (SPItemView *v = item->display; v != NULL; v = v->next) {
+        sp_image_update_arenaitem(image, dynamic_cast<Inkscape::DrawingImage *>(v->arenaitem));
+    }
+}
+
+void SPImage::snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) const {
+    /* An image doesn't have any nodes to snap, but still we want to be able snap one image
+    to another. Therefore we will create some snappoints at the corner, similar to a rect. If
+    the image is rotated, then the snappoints will rotate with it. Again, just like a rect.
+    */
+
+    if (this->clip_ref->getObject()) {
+        //We are looking at a clipped image: do not return any snappoints, as these might be
+        //far far away from the visible part from the clipped image
+        //TODO Do return snappoints, but only when within visual bounding box
+    } else {
+        if (snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_IMG_CORNER)) {
+            // The image has not been clipped: return its corners, which might be rotated for example
+            double const x0 = this->x.computed;
+            double const y0 = this->y.computed;
+            double const x1 = x0 + this->width.computed;
+            double const y1 = y0 + this->height.computed;
+
+            Geom::Affine const i2d (this->i2dt_affine ());
+
+            p.push_back(Inkscape::SnapCandidatePoint(Geom::Point(x0, y0) * i2d, Inkscape::SNAPSOURCE_IMG_CORNER, Inkscape::SNAPTARGET_IMG_CORNER));
+            p.push_back(Inkscape::SnapCandidatePoint(Geom::Point(x0, y1) * i2d, Inkscape::SNAPSOURCE_IMG_CORNER, Inkscape::SNAPTARGET_IMG_CORNER));
+            p.push_back(Inkscape::SnapCandidatePoint(Geom::Point(x1, y1) * i2d, Inkscape::SNAPSOURCE_IMG_CORNER, Inkscape::SNAPTARGET_IMG_CORNER));
+            p.push_back(Inkscape::SnapCandidatePoint(Geom::Point(x1, y0) * i2d, Inkscape::SNAPSOURCE_IMG_CORNER, Inkscape::SNAPTARGET_IMG_CORNER));
+        }
+    }
+}
+
+/*
+ * Initially we'll do:
+ * Transform x, y, set x, y, clear translation
+ */
+
+Geom::Affine SPImage::set_transform(Geom::Affine const &xform) {
+    /* Calculate position in parent coords. */
+    Geom::Point pos( Geom::Point(this->x.computed, this->y.computed) * xform );
+
+    /* This function takes care of translation and scaling, we return whatever parts we can't
+       handle. */
+    Geom::Affine ret(Geom::Affine(xform).withoutTranslation());
+    Geom::Point const scale(hypot(ret[0], ret[1]),
+                            hypot(ret[2], ret[3]));
+
+    if ( scale[Geom::X] > MAGIC_EPSILON ) {
+        ret[0] /= scale[Geom::X];
+        ret[1] /= scale[Geom::X];
+    } else {
+        ret[0] = 1.0;
+        ret[1] = 0.0;
+    }
+
+    if ( scale[Geom::Y] > MAGIC_EPSILON ) {
+        ret[2] /= scale[Geom::Y];
+        ret[3] /= scale[Geom::Y];
+    } else {
+        ret[2] = 0.0;
+        ret[3] = 1.0;
+    }
+
+    this->width = this->width.computed * scale[Geom::X];
+    this->height = this->height.computed * scale[Geom::Y];
+
+    /* Find position in item coords */
+    pos = pos * ret.inverse();
+    this->x = pos[Geom::X];
+    this->y = pos[Geom::Y];
+
+    this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+
+    return ret;
+}
+
+static void sp_image_set_curve( SPImage *image )
+{
+    //create a curve at the image's boundary for snapping
+    if ((image->height.computed < MAGIC_EPSILON_TOO) || (image->width.computed < MAGIC_EPSILON_TOO) || (image->clip_ref->getObject())) {
+        if (image->curve) {
+            image->curve = image->curve->unref();
+        }
+    } else {
+        Geom::OptRect rect = image->bbox(Geom::identity(), SPItem::VISUAL_BBOX);
+        SPCurve *c = SPCurve::new_from_rect(*rect, true);
+
+        if (image->curve) {
+            image->curve = image->curve->unref();
+        }
+
+        if (c) {
+            image->curve = c->ref();
+
+            c->unref();
+        }
+    }
+}
+
+/**
+ * Return duplicate of curve (if any exists) or NULL if there is no curve
+ */
+SPCurve *sp_image_get_curve( SPImage *image )
+{
+    SPCurve *result = 0;
+    if (image->curve) {
+        result = image->curve->copy();
+    }
+    return result;
+}
+
+void sp_embed_image(Inkscape::XML::Node *image_node, Inkscape::Pixbuf *pb)
+{
+    bool free_data = false;
+
+    // check whether the pixbuf has MIME data
+    guchar *data = NULL;
+    gsize len = 0;
+    std::string data_mimetype;
+
+    data = const_cast<guchar *>(pb->getMimeData(len, data_mimetype));
+
+    if (data == NULL) {
+        // if there is no supported MIME data, embed as PNG
+        data_mimetype = "image/png";
+        gdk_pixbuf_save_to_buffer(pb->getPixbufRaw(), reinterpret_cast<gchar**>(&data), &len, "png", NULL, NULL);
+        free_data = true;
+    }
+
+    // Save base64 encoded data in image node
+    // this formula taken from Glib docs
+    gsize needed_size = len * 4 / 3 + len * 4 / (3 * 72) + 7;
+    needed_size += 5 + 8 + data_mimetype.size(); // 5 bytes for data: + 8 for ;base64,
+
+    gchar *buffer = (gchar *) g_malloc(needed_size);
+    gchar *buf_work = buffer;
+    buf_work += g_sprintf(buffer, "data:%s;base64,", data_mimetype.c_str());
+
+    gint state = 0;
+    gint save = 0;
+    gsize written = 0;
+    written += g_base64_encode_step(data, len, TRUE, buf_work, &state, &save);
+    written += g_base64_encode_close(TRUE, buf_work + written, &state, &save);
+    buf_work[written] = 0; // null terminate
+
+    // TODO: this is very wasteful memory-wise.
+    // It would be better to only keep the binary data around,
+    // and base64 encode on the fly when saving the XML.
+    image_node->setAttribute("xlink:href", buffer);
+
+    g_free(buffer);
+    if (free_data) g_free(data);
+}
+
+void sp_image_refresh_if_outdated( SPImage* image )
+{
+    if ( image->href && image->pixbuf && image->pixbuf->modificationTime()) {
+        // It *might* change
+
+        GStatBuf st;
+        memset(&st, 0, sizeof(st));
+        int val = 0;
+        if (g_file_test (image->pixbuf->originalPath().c_str(), G_FILE_TEST_EXISTS)){ 
+            val = g_stat(image->pixbuf->originalPath().c_str(), &st);
+        }
+        if ( !val ) {
+            // stat call worked. Check time now
+            if ( st.st_mtime != image->pixbuf->modificationTime() ) {
+                image->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG);
+            }
+        }
+    }
+}
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :