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Deduplicate ShadowEffect class (#1691)
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Leo
GitHub
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commit
5c170b2e4e
@ -9,6 +9,7 @@ gala_lib_sources = files(
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'Drawing/Color.vala',
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'Drawing/Utilities.vala',
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'Plugin.vala',
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'ShadowEffect.vala',
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'Utils.vala',
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'WindowIcon.vala',
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'WindowManager.vala',
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@ -1,165 +0,0 @@
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/*
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* Copyright 2014 Tom Beckmann
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* Copyright 2023 elementary, Inc. <https://elementary.io>
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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public class Gala.Plugins.PIP.ShadowEffect : Clutter.Effect {
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private class Shadow {
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public int users;
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public Cogl.Texture texture;
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public Shadow (Cogl.Texture _texture) {
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texture = _texture;
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users = 1;
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}
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}
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// the sizes of the textures often repeat, especially for the background actor
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// so we keep a cache to avoid creating the same texture all over again.
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private static Gee.HashMap<string,Shadow> shadow_cache;
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private static Gtk.StyleContext style_context;
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class construct {
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shadow_cache = new Gee.HashMap<string,Shadow> ();
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var style_path = new Gtk.WidgetPath ();
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var id = style_path.append_type (typeof (Gtk.Window));
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style_context = new Gtk.StyleContext ();
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style_context.add_provider (Gala.Utils.get_gala_css (), Gtk.STYLE_PROVIDER_PRIORITY_FALLBACK);
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style_context.add_class ("decoration");
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style_context.set_path (style_path);
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}
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public int shadow_size { get; construct; }
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public float scale_factor { get; set; default = 1; }
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public uint8 shadow_opacity { get; set; default = 255; }
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public string? css_class { get; set; default = null; }
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private Cogl.Pipeline pipeline;
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private string? current_key = null;
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public ShadowEffect (int shadow_size) {
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Object (shadow_size: shadow_size);
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}
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construct {
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pipeline = new Cogl.Pipeline (Clutter.get_default_backend ().get_cogl_context ());
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}
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~ShadowEffect () {
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if (current_key != null) {
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decrement_shadow_users (current_key);
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}
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}
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private Cogl.Texture? get_shadow (Cogl.Context context, int width, int height, int shadow_size) {
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var old_key = current_key;
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current_key = "%ix%i:%i".printf (width, height, shadow_size);
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if (old_key == current_key) {
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return null;
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}
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if (old_key != null) {
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decrement_shadow_users (old_key);
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}
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Shadow? shadow = null;
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if ((shadow = shadow_cache.@get (current_key)) != null) {
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shadow.users++;
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return shadow.texture;
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}
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var surface = new Cairo.ImageSurface (Cairo.Format.ARGB32, width, height);
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var cr = new Cairo.Context (surface);
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cr.set_source_rgba (0, 0, 0, 0);
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cr.fill ();
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cr.set_operator (Cairo.Operator.OVER);
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cr.save ();
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cr.scale (scale_factor, scale_factor);
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style_context.save ();
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if (css_class != null) {
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style_context.add_class (css_class);
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}
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style_context.set_scale ((int)scale_factor);
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style_context.render_background (cr, shadow_size, shadow_size, width - shadow_size * 2, height - shadow_size * 2);
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style_context.restore ();
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cr.restore ();
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cr.paint ();
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try {
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var texture = new Cogl.Texture2D.from_data (context, width, height, Cogl.PixelFormat.BGRA_8888_PRE,
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surface.get_stride (), surface.get_data ());
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shadow_cache.@set (current_key, new Shadow (texture));
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return texture;
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} catch (Error e) {
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debug (e.message);
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return null;
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}
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}
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private void decrement_shadow_users (string key) {
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var shadow = shadow_cache.@get (key);
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if (shadow == null) {
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return;
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}
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if (--shadow.users == 0) {
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shadow_cache.unset (key);
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}
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}
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public override void paint (Clutter.PaintNode node, Clutter.PaintContext context, Clutter.EffectPaintFlags flags) {
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var bounding_box = get_bounding_box ();
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var width = (int) (bounding_box.x2 - bounding_box.x1);
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var height = (int) (bounding_box.y2 - bounding_box.y1);
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var shadow = get_shadow (context.get_framebuffer ().get_context (), width, height, shadow_size);
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if (shadow != null) {
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pipeline.set_layer_texture (0, shadow);
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}
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var opacity = actor.get_paint_opacity () * shadow_opacity / 255;
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var alpha = Cogl.Color.from_4ub (255, 255, 255, opacity);
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alpha.premultiply ();
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pipeline.set_color (alpha);
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context.get_framebuffer ().draw_rectangle (pipeline, bounding_box.x1, bounding_box.y1, bounding_box.x2, bounding_box.y2);
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actor.continue_paint (context);
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}
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public virtual Clutter.ActorBox get_bounding_box () {
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var size = shadow_size * scale_factor;
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var bounding_box = Clutter.ActorBox ();
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bounding_box.set_origin (-size, -size);
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bounding_box.set_size (actor.width + size * 2, actor.height + size * 2);
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return bounding_box;
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}
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public override bool modify_paint_volume (Clutter.PaintVolume volume) {
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var bounding_box = get_bounding_box ();
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volume.set_width (bounding_box.get_width ());
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volume.set_height (bounding_box.get_height ());
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float origin_x, origin_y;
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bounding_box.get_origin (out origin_x, out origin_y);
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var origin = volume.get_origin ();
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origin.x += origin_x;
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origin.y += origin_y;
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volume.set_origin (origin);
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return true;
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}
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}
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@ -1,8 +1,7 @@
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gala_pip_sources = [
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'Main.vala',
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'PopupWindow.vala',
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'SelectionArea.vala',
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'ShadowEffect.vala',
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'SelectionArea.vala'
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]
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gala_pip_lib = shared_library(
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@ -13,7 +13,6 @@ gala_bin_sources = files(
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'ScreenSaverManager.vala',
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'ScreenshotManager.vala',
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'SessionManager.vala',
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'ShadowEffect.vala',
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'WindowListener.vala',
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'WindowManager.vala',
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'WindowTracker.vala',
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