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// SPDX-License-Identifier: GPL-2.0-or-later
/**
* SVG to Pixbuf renderer
*
* Author:
* Michael Kowalski
*
* Copyright (C) 2020-2021 Michael Kowalski
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "svg-renderer.h"
#include "io/file.h"
#include "xml/repr.h"
#include "object/sp-root.h"
#include "display/cairo-utils.h"
#include "helper/pixbuf-ops.h"
#include "util/units.h"
namespace Inkscape {
Glib::ustring rgba_to_css_color(double r, double g, double b) {
char buffer[16];
sprintf(buffer, "#%02x%02x%02x",
static_cast<int>(r * 0xff + 0.5),
static_cast<int>(g * 0xff + 0.5),
static_cast<int>(b * 0xff + 0.5)
);
return Glib::ustring(buffer);
}
Glib::ustring rgba_to_css_color(const Gdk::RGBA& color) {
return rgba_to_css_color(color.get_red(), color.get_green(), color.get_blue());
}
Glib::ustring rgba_to_css_color(const SPColor& color) {
float rgb[3];
color.get_rgb_floatv(rgb);
return rgba_to_css_color(rgb[0], rgb[1], rgb[2]);
}
Glib::ustring double_to_css_value(double value) {
char buffer[32];
// arbitrarily chosen precision
sprintf(buffer, "%.4f", value);
return Glib::ustring(buffer);
}
svg_renderer::svg_renderer(const char* svg_file_path) {
auto file = Gio::File::create_for_path(svg_file_path);
_document.reset(ink_file_open(file, nullptr));
if (_document) {
_root = _document->getRoot();
}
if (!_root) throw std::runtime_error("Cannot find root element in svg document");
}
size_t svg_renderer::set_style(const Glib::ustring& selector, const char* name, const Glib::ustring& value) {
auto objects = _document->getObjectsBySelector(selector);
for (auto el : objects) {
if (SPCSSAttr* css = sp_repr_css_attr(el->getRepr(), "style")) {
sp_repr_css_set_property(css, name, value.c_str());
el->changeCSS(css, "style");
sp_repr_css_attr_unref(css);
}
}
return objects.size();
}
double svg_renderer::get_width_px() const {
return _document->getWidth().value("px");
}
double svg_renderer::get_height_px() const {
return _document->getHeight().value("px");
}
Inkscape::Pixbuf* svg_renderer::do_render(double scale) {
auto w = _document->getWidth().value("px");
auto h = _document->getHeight().value("px");
auto dpi = 96 * scale;
auto area = Geom::Rect(0, 0, w, h);
return sp_generate_internal_bitmap(_document.get(), area, dpi);
}
Glib::RefPtr<Gdk::Pixbuf> svg_renderer::render(double scale) {
auto pixbuf = do_render(scale);
if (!pixbuf) return Glib::RefPtr<Gdk::Pixbuf>();
// ref it
auto raw = Glib::wrap(pixbuf->getPixbufRaw(), true);
delete pixbuf;
return raw;
}
Cairo::RefPtr<Cairo::Surface> svg_renderer::render_surface(double scale) {
auto pixbuf = do_render(scale);
if (!pixbuf) return Cairo::RefPtr<Cairo::Surface>();
// ref it by saying that we have no reference
auto surface = Cairo::RefPtr<Cairo::Surface>(new Cairo::Surface(pixbuf->getSurfaceRaw(), false));
delete pixbuf;
return surface;
}
} // namespace
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