[gtk/wip/baedert/for-master: 1/2] glcontext-wayland: Only allocate configs we use

[Timm Bäder <baedert src gnome org>]

commit b14270c3f793990ad247174738f676c0207d9635
Author: Timm Bäder <mail baedert org>
Date:   Thu Dec 24 09:09:35 2020 +0100

    glcontext-wayland: Only allocate configs we use
    
    We only use the first one, so don't allocate space for more than that.

 gdk/wayland/gdkglcontext-wayland.c | 24 +++++-------------------
 1 file changed, 5 insertions(+), 19 deletions(-)
---
diff --git a/gdk/wayland/gdkglcontext-wayland.c b/gdk/wayland/gdkglcontext-wayland.c
index 726ca25f10..c4bf5fcf05 100644
--- a/gdk/wayland/gdkglcontext-wayland.c
+++ b/gdk/wayland/gdkglcontext-wayland.c
@@ -387,7 +387,7 @@ find_eglconfig_for_surface (GdkSurface  *surface,
   EGLint attrs[MAX_EGL_ATTRS];
   EGLBoolean result;
   EGLint count;
-  EGLConfig *configs;
+  EGLConfig config;
   int i = 0;
 
   attrs[i++] = EGL_SURFACE_TYPE;
@@ -408,18 +408,8 @@ find_eglconfig_for_surface (GdkSurface  *surface,
   attrs[i++] = EGL_NONE;
   g_assert (i < MAX_EGL_ATTRS);
 
-  result = eglChooseConfig (display_wayland->egl_display, attrs, NULL, 0, &count);
-  if (!result || count < 1)
-    {
-      g_set_error_literal (error, GDK_GL_ERROR,
-                           GDK_GL_ERROR_UNSUPPORTED_FORMAT,
-                           _("No available configurations for the given pixel format"));
-      return FALSE;
-    }
-
-  configs = g_new (EGLConfig, count);
-
-  result = eglChooseConfig (display_wayland->egl_display, attrs, configs, count, &count);
+  /* Pick first valid configuration i guess? */
+  result = eglChooseConfig (display_wayland->egl_display, attrs, &config, 1, &count);
   if (!result || count < 1)
     {
       g_set_error_literal (error, GDK_GL_ERROR,
@@ -428,12 +418,8 @@ find_eglconfig_for_surface (GdkSurface  *surface,
       return FALSE;
     }
 
-  /* Pick first valid configuration i guess? */
-
-  if (egl_config_out != NULL)
-    *egl_config_out = configs[0];
-
-  g_free (configs);
+  g_assert (egl_config_out);
+  *egl_config_out = config;
 
   return TRUE;
 }