From c7493496c91f17390ea6f958b0ec33947f0cb817 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Sat, 2 Jul 2022 16:43:27 +0200
Subject: Wayland platform: add support of FL_ALPHA for GL windows.

---
 src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src')

diff --git a/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
index fad32cb15..b37e0c483 100644
--- a/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
@@ -126,12 +126,14 @@ Fl_Gl_Choice *Fl_Wayland_Gl_Window_Driver::find(int m, const int *alistp)
     EGL_DEPTH_SIZE, 0, // set at 11
     EGL_SAMPLE_BUFFERS, 0,  // set at 13
     EGL_STENCIL_SIZE, 0, // set at 15
+    EGL_ALPHA_SIZE, 0, // set at 17
     EGL_NONE
   };
 
   if (m & FL_DEPTH) config_attribs[11] = 1;
   if (m & FL_MULTISAMPLE) config_attribs[13] = 1;
   if (m & FL_STENCIL) config_attribs[15] = 1;
+  if (m & FL_ALPHA) config_attribs[17] = (m & FL_RGB8) ? 8 : 1;
 
   static EGLConfig *configs = (void**)calloc(configs_count, sizeof(EGLConfig));
   eglChooseConfig(egl_display, config_attribs, configs, configs_count, &n);
-- 
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