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Diffstat (limited to 'src/object/sp-image.cpp')
| -rw-r--r-- | src/object/sp-image.cpp | 897 |
1 files changed, 897 insertions, 0 deletions
diff --git a/src/object/sp-image.cpp b/src/object/sp-image.cpp new file mode 100644 index 0000000..0410157 --- /dev/null +++ b/src/object/sp-image.cpp @@ -0,0 +1,897 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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 v2+, read the file 'COPYING' for more information. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" // only include where actually required! +#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 <giomm/error.h> + +#include "snap-candidate.h" +#include "snap-preferences.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 "document.h" +#include "sp-image.h" +#include "sp-clippath.h" +#include "xml/quote.h" +#include "preferences.h" +#include "io/sys.h" + +#include "cms-system.h" +#include "color-profile.h" +#include <lcms2.h> + +//#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 +/* + * 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 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->dpi = 96.00; + this->prev_width = 0.0; + this->prev_height = 0.0; + this->curve = nullptr; + + this->href = nullptr; + this->color_profile = nullptr; + this->pixbuf = nullptr; +} + +SPImage::~SPImage() = default; + +void SPImage::build(SPDocument *document, Inkscape::XML::Node *repr) { + SPItem::build(document, repr); + + this->readAttr(SPAttr::XLINK_HREF); + this->readAttr(SPAttr::X); + this->readAttr(SPAttr::Y); + this->readAttr(SPAttr::WIDTH); + this->readAttr(SPAttr::HEIGHT); + this->readAttr(SPAttr::SVG_DPI); + this->readAttr(SPAttr::PRESERVEASPECTRATIO); + this->readAttr(SPAttr::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 = nullptr; + } + + delete this->pixbuf; + this->pixbuf = nullptr; + + if (this->color_profile) { + g_free (this->color_profile); + this->color_profile = nullptr; + } + + curve.reset(); + + SPItem::release(); +} + +void SPImage::set(SPAttr key, const gchar* value) { + switch (key) { + case SPAttr::XLINK_HREF: + g_free (this->href); + this->href = (value) ? g_strdup (value) : nullptr; + this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG); + break; + + case SPAttr::X: + /* ex, em not handled correctly. */ + if (!this->x.read(value)) { + this->x.unset(); + } + + this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); + break; + + case SPAttr::Y: + /* ex, em not handled correctly. */ + if (!this->y.read(value)) { + this->y.unset(); + } + + this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); + break; + + case SPAttr::WIDTH: + /* ex, em not handled correctly. */ + if (!this->width.read(value)) { + this->width.unset(); + } + + this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); + break; + + case SPAttr::HEIGHT: + /* ex, em not handled correctly. */ + if (!this->height.read(value)) { + this->height.unset(); + } + + this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); + break; + + case SPAttr::SVG_DPI: + this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG); + break; + + case SPAttr::PRESERVEASPECTRATIO: + set_preserveAspectRatio( value ); + this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG); + break; + + case SPAttr::COLOR_PROFILE: + if ( this->color_profile ) { + g_free (this->color_profile); + } + + this->color_profile = (value) ? g_strdup (value) : nullptr; + + 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; + + + default: + SPItem::set(key, value); + break; + } + + sp_image_set_curve(this); //creates a curve at the image's boundary for snapping +} + +// BLIP +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." ); + } + } +} + +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 = nullptr; + if (this->href) { + Inkscape::Pixbuf *pixbuf = nullptr; + double svgdpi = 96; + if (this->getRepr()->attribute("inkscape:svg-dpi")) { + svgdpi = g_ascii_strtod(this->getRepr()->attribute("inkscape:svg-dpi"), nullptr); + } + this->dpi = svgdpi; + pixbuf = readImage(this->getRepr()->attribute("xlink:href"), + this->getRepr()->attribute("sodipodi:absref"), + doc->getDocumentBase(), svgdpi); + if (!pixbuf) { + // Passing in our previous size allows us to preserve the image's expected size. + auto broken_width = width._set ? width.computed : 640; + auto broken_height = height._set ? height.computed : 640; + pixbuf = getBrokenImage(broken_width, broken_height); + } + + if (pixbuf) { + if ( this->color_profile ) apply_profile( pixbuf ); + 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); + + // don't crash with missing xlink:href attribute + if (!this->pixbuf) { + return; + } + + double proportion_pixbuf = this->pixbuf->height() / (double)this->pixbuf->width(); + double proportion_image = this->height.computed / (double)this->width.computed; + if (this->prev_width && + (this->prev_width != this->pixbuf->width() || this->prev_height != this->pixbuf->height())) { + if (std::abs(this->prev_width - this->pixbuf->width()) > std::abs(this->prev_height - this->pixbuf->height())) { + proportion_pixbuf = this->pixbuf->width() / (double)this->pixbuf->height(); + proportion_image = this->width.computed / (double)this->height.computed; + if (proportion_pixbuf != proportion_image) { + double new_height = this->height.computed * proportion_pixbuf; + this->getRepr()->setAttributeSvgDouble("width", new_height); + } + } + else { + if (proportion_pixbuf != proportion_image) { + double new_width = this->width.computed * proportion_pixbuf; + this->getRepr()->setAttributeSvgDouble("height", new_width); + } + } + } + this->prev_width = this->pixbuf->width(); + this->prev_height = this->pixbuf->height(); +} + +void SPImage::modified(unsigned int flags) { +// SPItem::onModified(flags); + + if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) { + for (SPItemView *v = this->display; v != nullptr; 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) { + repr->setAttributeSvgDouble("x", this->x.computed); + } + + if (this->y._set) { + repr->setAttributeSvgDouble("y", this->y.computed); + } + + if (this->width._set) { + repr->setAttributeSvgDouble("width", this->width.computed); + } + + if (this->height._set) { + repr->setAttributeSvgDouble("height", this->height.computed); + } + repr->setAttribute("inkscape:svg-dpi", this->getRepr()->attribute("inkscape:svg-dpi")); + + this->write_preserveAspectRatio(repr); + + if (this->color_profile) { + repr->setAttribute("color-profile", this->color_profile); + } + + 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; + ctx->image_R8G8B8A8_N(px, w, h, rs, t, this->style); + delete pb; + } +} + +const char* SPImage::typeName() const { + return "image"; +} + +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 == nullptr + ? g_strdup_printf(_("[bad reference]: %s"), href_desc) + : g_strdup_printf(_("%d × %d: %s"), + this->pixbuf->width(), + this->pixbuf->height(), + href_desc) ); + + if (this->pixbuf == nullptr && + this->document) + { + Inkscape::Pixbuf * pb = nullptr; + double svgdpi = 96; + if (this->getRepr()->attribute("inkscape:svg-dpi")) { + svgdpi = g_ascii_strtod(this->getRepr()->attribute("inkscape:svg-dpi"), nullptr); + } + pb = readImage(this->getRepr()->attribute("xlink:href"), + this->getRepr()->attribute("sodipodi:absref"), + this->document->getDocumentBase(), svgdpi); + + if (pb) { + ret = g_strdup_printf(_("%d × %d: %s"), + pb->width(), + pb->height(), + href_desc); + delete pb; + } else { + ret = g_strdup(_("{Broken Image}")); + } + } + + 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 *SPImage::readImage(gchar const *href, gchar const *absref, gchar const *base, double svgdpi) +{ + Inkscape::Pixbuf *inkpb = nullptr; + + gchar const *filename = href; + + if (filename != nullptr) { + if (g_ascii_strncasecmp(filename, "data:", 5) == 0) { + /* data URI - embedded image */ + filename += 5; + inkpb = Inkscape::Pixbuf::create_from_data_uri(filename, svgdpi); + } else { + auto url = Inkscape::URI::from_href_and_basedir(href, base); + + if (url.hasScheme("file")) { + auto native = url.toNativeFilename(); + inkpb = Inkscape::Pixbuf::create_from_file(native.c_str(), svgdpi); + } else { + try { + auto contents = url.getContents(); + inkpb = Inkscape::Pixbuf::create_from_buffer(contents, svgdpi); + } catch (const Gio::Error &e) { + g_warning("URI::getContents failed for '%.100s'", href); + } + } + } + + if (inkpb != nullptr) { + return inkpb; + } + } + + /* at last try to load from sp absolute path name */ + filename = absref; + if (filename != nullptr) { + // using absref is outside of SVG rules, so we must at least warn the user + if ( base != nullptr && href != nullptr ) { + 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, svgdpi); + if (inkpb != nullptr) { + return inkpb; + } + } + return inkpb; +} + +static std::string broken_image_svg = R"A( +<svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" width="{width}" height="{height}"> + <defs> + <symbol id="nope" style="fill:none;stroke:#ffffff;stroke-width:3" viewBox="0 0 10 10" preserveAspectRatio="{aspect}"> + <circle cx="0" cy="0" r="10" style="fill:#a40000;stroke:#cc0000" /> + <line x1="0" x2="0" y1="-5" y2="5" transform="rotate(45)" /> + <line x1="0" x2="0" y1="-5" y2="5" transform="rotate(-45)" /> + </symbol> + </defs> + <rect width="100%" height="100%" style="fill:white;stroke:#cc0000;stroke-width:6%" /> + <use xlink:href="#nope" width="30%" height="30%" x="50%" y="50%" /> +</svg> + +)A"; + +/** + * Load a standard broken image svg, used if we fail to load pixbufs from the href. + */ +Inkscape::Pixbuf *SPImage::getBrokenImage(double width, double height) +{ + // Cheap templating for size allows for dynamic sized svg + std::string copy = broken_image_svg; + copy.replace(copy.find("{width}"), std::string("{width}").size(), std::to_string(width)); + copy.replace(copy.find("{height}"), std::string("{height}").size(), std::to_string(height)); + + // Aspect attempts to make the image better for different ratios of images we might be dropped into + copy.replace(copy.find("{aspect}"), std::string("{aspect}").size(), + width > height ? "xMinYMid" : "xMidYMin"); + + auto inkpb = Inkscape::Pixbuf::create_from_buffer(copy, 0, "brokenimage.svg"); + + /* It's included here so if it still does not does load, our libraries are broken! */ + g_assert (inkpb != nullptr); + + 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(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) +{ + for (SPItemView *v = image->display; v != nullptr; 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->getClipObject()) { + //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.emplace_back(Geom::Point(x0, y0) * i2d, Inkscape::SNAPSOURCE_IMG_CORNER, Inkscape::SNAPTARGET_IMG_CORNER); + p.emplace_back(Geom::Point(x0, y1) * i2d, Inkscape::SNAPSOURCE_IMG_CORNER, Inkscape::SNAPTARGET_IMG_CORNER); + p.emplace_back(Geom::Point(x1, y1) * i2d, Inkscape::SNAPSOURCE_IMG_CORNER, Inkscape::SNAPTARGET_IMG_CORNER); + p.emplace_back(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]; + + 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->getClipObject())) { + } else { + Geom::OptRect rect = image->bbox(Geom::identity(), SPItem::VISUAL_BBOX); + + if (rect->isFinite()) { + image->curve = SPCurve::new_from_rect(*rect, true); + } + } +} + +/** + * Return duplicate of curve (if any exists) or NULL if there is no curve + */ +std::unique_ptr<SPCurve> SPImage::get_curve() const +{ + return SPCurve::copy(curve.get()); +} + +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 = nullptr; + gsize len = 0; + std::string data_mimetype; + + data = const_cast<guchar *>(pb->getMimeData(len, data_mimetype)); + + if (data == nullptr) { + // 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", nullptr, nullptr); + 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_embed_svg(Inkscape::XML::Node *image_node, std::string const &fn) +{ + if (!g_file_test(fn.c_str(), G_FILE_TEST_EXISTS)) { + return; + } + GStatBuf stdir; + int val = g_stat(fn.c_str(), &stdir); + if (val == 0 && stdir.st_mode & S_IFDIR){ + return; + } + + // we need to load the entire file into memory, + // since we'll store it as MIME data + gchar *data = nullptr; + gsize len = 0; + GError *error = nullptr; + + if (g_file_get_contents(fn.c_str(), &data, &len, &error)) { + + if (error != nullptr) { + std::cerr << "Pixbuf::create_from_file: " << error->message << std::endl; + std::cerr << " (" << fn << ")" << std::endl; + return; + } + + std::string data_mimetype = "image/svg+xml"; + + + // 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(reinterpret_cast<guchar *>(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); + g_free(data); + } +} + +void SPImage::refresh_if_outdated() +{ + if ( href && pixbuf && pixbuf->modificationTime()) { + // It *might* change + + GStatBuf st; + memset(&st, 0, sizeof(st)); + int val = 0; + if (g_file_test (pixbuf->originalPath().c_str(), G_FILE_TEST_EXISTS)){ + val = g_stat(pixbuf->originalPath().c_str(), &st); + } + if ( !val ) { + // stat call worked. Check time now + if ( st.st_mtime != pixbuf->modificationTime() ) { + 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 : |