commit c7493496c91f17390ea6f958b0ec33947f0cb817
Author:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
AuthorDate: Sat Jul 2 16:43:27 2022 +0200
Commit:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
CommitDate: Sat Jul 2 16:43:27 2022 +0200

    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(+)

diff --git src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
index fad32cb..b37e0c4 100644
--- src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
+++ 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);