From 60cc96d24357b89639aaa16b9e6c3d933ca051e0 Mon Sep 17 00:00:00 2001
From: MacDue <macdue@dueutil.tech>
Date: Mon, 3 Oct 2022 20:46:34 +0100
Subject: [PATCH] LibWeb: Support painting the `saturate()` filter effect

---
 Userland/Libraries/LibWeb/Painting/FilterPainting.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibWeb/Painting/FilterPainting.cpp b/Userland/Libraries/LibWeb/Painting/FilterPainting.cpp
index ef54070962..38abcfd482 100644
--- a/Userland/Libraries/LibWeb/Painting/FilterPainting.cpp
+++ b/Userland/Libraries/LibWeb/Painting/FilterPainting.cpp
@@ -10,6 +10,7 @@
 #include <LibGfx/Filters/HueRotateFilter.h>
 #include <LibGfx/Filters/InvertFilter.h>
 #include <LibGfx/Filters/OpacityFilter.h>
+#include <LibGfx/Filters/SaturateFilter.h>
 #include <LibGfx/Filters/SepiaFilter.h>
 #include <LibGfx/Filters/StackBlurFilter.h>
 #include <LibWeb/Layout/Node.h>
@@ -74,7 +75,11 @@ void apply_filter_list(Gfx::Bitmap& target_bitmap, Layout::Node const& node, Spa
                     break;
                 }
                 case CSS::Filter::Color::Operation::Saturate: {
-                    dbgln("TODO: Implement saturate() filter function!");
+                    // Saturates the input image. The passed parameter defines the proportion of the conversion.
+                    // A value of 0% is completely un-saturated. A value of 100% leaves the input unchanged.
+                    // Other values are linear multipliers on the effect.
+                    // Values of amount over 100% are allowed, providing super-saturated results
+                    apply_color_filter(Gfx::SaturateFilter { amount });
                     break;
                 }
                 default: