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-rw-r--r--src/ui/widget/shapeicon.cpp117
1 files changed, 117 insertions, 0 deletions
diff --git a/src/ui/widget/shapeicon.cpp b/src/ui/widget/shapeicon.cpp
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+++ b/src/ui/widget/shapeicon.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ * Martin Owens
+ *
+ * Copyright (C) 2020 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+
+#include "color.h"
+#include "ui/widget/shapeicon.h"
+#include "ui/icon-loader.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+/*
+ * This is a type of CellRenderer which you might expect to inherit from the
+ * pixbuf CellRenderer, but we actually need to write a Cairo surface directly
+ * in order to maintain HiDPI sharpness in icons. Upstream Gtk have made it clear
+ * that CellRenderers are going away in Gtk4 so they aren't interested in fixing
+ * rendering problems like the one in CellRendererPixbuf.
+ *
+ * See: https://gitlab.gnome.org/GNOME/gtk/-/issues/613
+ */
+
+void CellRendererItemIcon::render_vfunc(const Cairo::RefPtr<Cairo::Context>& cr,
+ Gtk::Widget& widget,
+ const Gdk::Rectangle& background_area,
+ const Gdk::Rectangle& cell_area,
+ Gtk::CellRendererState flags)
+{
+ std::string shape_type = _property_shape_type.get_value();
+ std::string highlight = SPColor(_property_color.get_value()).toString();
+ std::string cache_id = shape_type + "-" + highlight;
+
+ // if the icon isn't cached, render it to a pixbuf
+ int scale = widget.get_scale_factor();
+ if ( !_icon_cache[cache_id] ) {
+ _icon_cache[cache_id] = sp_get_shape_icon(shape_type, Gdk::RGBA(highlight), _size, scale);
+ }
+ g_return_if_fail(_icon_cache[cache_id]);
+
+ // Center the icon in the cell area
+ int x = cell_area.get_x() + int((cell_area.get_width() - _size) * 0.5);
+ int y = cell_area.get_y() + int((cell_area.get_height() - _size) * 0.5);
+
+ // Paint the pixbuf to a cairo surface to get HiDPI support
+ paint_icon(cr, widget, _icon_cache[cache_id], x, y);
+
+ // Create an overlay icon
+ int clipmask = _property_clipmask.get_value();
+ if (clipmask > 0) {
+ if (!_clip_overlay) {
+ _clip_overlay = sp_get_icon_pixbuf("overlay-clip", Gtk::ICON_SIZE_MENU, scale);
+ }
+ if (!_mask_overlay) {
+ _mask_overlay = sp_get_icon_pixbuf("overlay-mask", Gtk::ICON_SIZE_MENU, scale);
+ }
+
+ if (clipmask == OVERLAY_CLIP && _clip_overlay) {
+ paint_icon(cr, widget, _clip_overlay, x, y);
+ }
+ if (clipmask == OVERLAY_MASK && _mask_overlay) {
+ paint_icon(cr, widget, _mask_overlay, x, y);
+ }
+ }
+
+}
+
+void CellRendererItemIcon::paint_icon(const Cairo::RefPtr<Cairo::Context>& cr,
+ Gtk::Widget& widget,
+ Glib::RefPtr<Gdk::Pixbuf> pixbuf,
+ int x, int y)
+{
+ cairo_surface_t *surface = gdk_cairo_surface_create_from_pixbuf(
+ pixbuf->gobj(), 0, widget.get_window()->gobj());
+ if (!surface) return;
+ cairo_set_source_surface(cr->cobj(), surface, x, y);
+ cr->set_operator(Cairo::OPERATOR_ATOP);
+ cr->rectangle(x, y, _size, _size);
+ cr->fill();
+ cairo_surface_destroy(surface); // free!
+}
+
+void CellRendererItemIcon::get_preferred_height_vfunc(Gtk::Widget& widget, int& min_h, int& nat_h) const
+{
+ min_h = _size;
+ nat_h = _size + 4;
+}
+
+void CellRendererItemIcon::get_preferred_width_vfunc(Gtk::Widget& widget, int& min_w, int& nat_w) const
+{
+ min_w = _size;
+ nat_w = _size + 4;
+}
+
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+/*
+ 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:fileencoding=utf-8:textwidth=99 :
+
+