[gnome-music/wip/mschraal/gtk4-svgpaintable: 1/2] Add SVGPaintable

[Marinus Schraal <mschraal src gnome org>]

commit e8d11468a74ed33a9d74fe448ac2010a9a42266c
Author: Marinus Schraal <mschraal gnome org>
Date:   Wed Feb 9 16:41:17 2022 +0100

    Add SVGPaintable

 gnomemusic/svgpaintable.py | 95 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
---
diff --git a/gnomemusic/svgpaintable.py b/gnomemusic/svgpaintable.py
new file mode 100644
index 000000000..ebf76713a
--- /dev/null
+++ b/gnomemusic/svgpaintable.py
@@ -0,0 +1,95 @@
+# Copyright 2022 The GNOME Music developers
+#
+# GNOME Music is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# GNOME Music is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with GNOME Music; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# The GNOME Music authors hereby grant permission for non-GPL compatible
+# GStreamer plugins to be used and distributed together with GStreamer
+# and GNOME Music.  This permission is above and beyond the permissions
+# granted by the GPL license by which GNOME Music is covered.  If you
+# modify this code, you may extend this exception to your version of the
+# code, but you are not obligated to do so.  If you do not wish to do so,
+# delete this exception statement from your version.
+
+from __future__ import annotations
+
+import gi
+gi.require_versions({"Gdk": "4.0", "Gtk": "4.0", "Gsk": "4.0"})
+from gi.repository import Rsvg, Gio, Gsk, Gtk, GObject, Graphene, Gdk
+
+from gnomemusic.utils import ArtSize, DefaultIconType
+
+
+class SVGPaintable(GObject.GObject, Gdk.Paintable):
+    """An album/artist cover or placeholder
+
+    Provides the full looks. Rounded corners for albums and round for
+    artists.
+    """
+
+    __gtype_name__ = "SVGPaintable"
+
+    def __init__(self, resource) -> None:
+        """Initiliaze CoverPaintable
+
+        :param ArtSize art_size: Size of the cover
+        :param Gtk.Widget widget: Widget using the cover
+        :param DefaultIconType icon_type: Type of cover
+        :param Gdk.Texture texture: Texture to use or None for
+            placeholder
+        :param bool dark: Dark mode
+        """
+        super().__init__()
+
+        self._resource = resource
+
+        io_stream = Gio.resources_open_stream(
+            "/org/gnome/Music/icons/welcome-music.svg", Gio.ResourceLookupFlags.NONE)
+        print(io_stream)
+
+        self._handle = Rsvg.Handle.new_from_stream_sync(io_stream, None, 0, None)
+        self._handle.set_dpi(90)
+
+    def do_snapshot(self, snapshot: Gtk.Snapshot, w: int, h: int) -> None:
+        print("snapshot", w, h)
+        rsvg_rect = Rsvg.Rectangle()
+        rsvg_rect.x = 0
+        rsvg_rect.y = 0
+        rsvg_rect.width = w
+        rsvg_rect.height = h
+        print("rsvg", rsvg_rect.width)
+
+        grph_rect = Graphene.Rect().init(0, 0, w, h)
+        cr = snapshot.append_cairo(grph_rect)
+        # snapshot.append_color(Gdk.RGBA(0.5, 0.5, 0.5, 0.5), grph_rect)
+        try:
+            print(rsvg_rect)
+            self._handle.render_document(cr, rsvg_rect)
+            # self._handle.render_cairo(cr)
+        except:
+            print("error")
+
+    def do_get_flags(self) -> Gdk.PaintableFlags:
+        return Gdk.PaintableFlags.CONTENTS
+
+    def do_get_intrinsic_height(self) -> int:
+        _, _, h = self._handle.get_intrinsic_size_in_pixels()
+
+        return h
+
+    def do_get_intrinsic_width(self) -> int:
+        print(self._handle.get_intrinsic_size_in_pixels())
+        _, w, _ = self._handle.get_intrinsic_size_in_pixels()
+
+        return w