From a0971b0a124f7c1ff040cc226aaa0ce7e58b8a40 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Fri, 2 Aug 2024 06:01:50 +0200
Subject: Ensure correct blending function for transparent window

---
 depends/mgl                     | 2 +-
 include/mglpp/window/Window.hpp | 5 ++++-
 src/window/Window.cpp           | 8 ++++++++
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/depends/mgl b/depends/mgl
index 470dac0..f2da590 160000
--- a/depends/mgl
+++ b/depends/mgl
@@ -1 +1 @@
-Subproject commit 470dac0e891c1ec59dfe52e77861cf068837976d
+Subproject commit f2da59054cedd1c07779e72537da4d7b14616b48
diff --git a/include/mglpp/window/Window.hpp b/include/mglpp/window/Window.hpp
index 7d3f90b..6e4e485 100644
--- a/include/mglpp/window/Window.hpp
+++ b/include/mglpp/window/Window.hpp
@@ -44,7 +44,7 @@ namespace mgl {
             WindowHandle parent_window = 0; /* 0 = root window */
             bool hidden = false;
             bool override_redirect = false;
-            bool support_alpha = false; /* support alpha for the window */
+            bool support_alpha = false; /* support alpha for the window. If this is set to true then you need to call window.set_texture_blend_func before rendering textures and call window.set_render_blend_func afterwards to ensure correct alpha blending */
             bool hide_decorations = false; /* this is a hint, it may be ignored by the window manager */
             Color background_color = {0, 0, 0, 0};
             const char *class_name = nullptr;
@@ -107,6 +107,9 @@ namespace mgl {
         bool get_clipboard(ClipboardCallback callback);
         std::string get_clipboard_string();
 
+        void set_texture_blend_func();
+        void set_render_blend_func();
+
         WindowHandle get_system_handle() const;
 
         mgl_window* internal_window();
diff --git a/src/window/Window.cpp b/src/window/Window.cpp
index 339df71..0e80456 100644
--- a/src/window/Window.cpp
+++ b/src/window/Window.cpp
@@ -182,6 +182,14 @@ namespace mgl {
         return result;
     }
 
+    void Window::set_texture_blend_func() {
+        mgl_window_set_texture_blend_func(&window);
+    }
+
+    void Window::set_render_blend_func() {
+        mgl_window_set_render_blend_func(&window);
+    }
+
     WindowHandle Window::get_system_handle() const {
         return window.window;
     }
-- 
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