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Add setting for greyscale

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This commit is contained in:
Adam Bieńkowski 2019-08-05 21:34:44 +02:00
parent 50694796d4
commit bd347ef9ef
3 changed files with 38 additions and 2 deletions
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4
data/org.pantheon.desktop.gala.gschema.xml.in
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@ -155,6 +155,10 @@
<summary>Attach modal dialogs</summary>
<description>When true, instead of having independent titlebars, modal dialogs appear attached to the titlebar of the parent window and are moved together with the parent window.</description>
</key>
<key type="b" name="greyscale">
<default>false</default>
<summary>If the display should be greyscale</summary>
</key>
<key type="s" name="button-layout">
<default>'close:maximize'</default>
<summary>Arrangement of buttons on the titlebar</summary>

1
src/Settings.vala
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@ -74,6 +74,7 @@ namespace Gala
public bool attach_modal_dialogs { get; set; }
public bool dim_parents { get; set; }
public string workspace_switcher_background { get; set; }
public bool greyscale { get; set; }
static AppearanceSettings? instance = null;

35
src/WindowManager.vala
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@ -70,7 +70,9 @@ namespace Gala
Clutter.Actor? last_hotcorner;
ScreenSaver? screensaver;
Clutter.Actor? tile_preview;
Clutter.Actor? tile_preview;
Clutter.ShaderEffect? greyscale_effect;
Window? moving; //place for the window that is being moved over
@ -310,7 +312,9 @@ namespace Gala
update_input_area ();
stage.show ();
stage.show ();
toggle_greyscale ();
AppearanceSettings.get_default ().notify["greyscale"].connect (toggle_greyscale);
// let the session manager move to the next phase
Meta.register_with_session ();
@ -323,6 +327,33 @@ namespace Gala
return false;
}
void toggle_greyscale ()
{
if (greyscale_effect == null) {
greyscale_effect = new Clutter.ShaderEffect (Clutter.ShaderType.FRAGMENT_SHADER);
greyscale_effect.set_name ("greyscale");
greyscale_effect.set_shader_source ("""
uniform sampler2D texture;
void main () {
vec4 color = texture2D (texture, cogl_tex_coord0_in.xy);
float gray = dot(color.rgb, vec3(0.299, 0.587, 0.114));
cogl_color_out = vec4(vec3(gray), 1.0);
}
""");
greyscale_effect.set_uniform_value ("texture", 0);
}
if (AppearanceSettings.get_default ().greyscale) {
if (ui_group.get_effect ("greyscale") == null) {
ui_group.add_effect (greyscale_effect);
}
} else {
if (ui_group.get_effect ("greyscale") != null) {
ui_group.remove_effect (greyscale_effect);
}
}
}
void configure_hotcorners ()
{
var geometry = get_screen ().get_monitor_geometry (get_screen ().get_primary_monitor ());