gl: Set legacy bit depending on OpenGL version

GDK defaults to asking for an OpenGL 3.2 Core Profile, but if we get a
legacy profile from the underlying windowing system, the OpenGL version
will be fixed to 3.0. If that happens, we need to set the legacy bit on
the GdkGLContext, since that bit will be used to determine the version
and type of GLSL shaders that will be used by application and toolkit
code alike.

diff --git a/gdk/gdkglcontext.c b/gdk/gdkglcontext.c
index 248ce1148d38fade6579607c5e1bbf31dde5b0ba..06cae69e4e956cc5fd6930c014a0761f705c41af 100644 (file)
--- a/gdk/gdkglcontext.c
+++ b/gdk/gdkglcontext.c
@@ -811,6 +811,10 @@ gdk_gl_context_check_extensions (GdkGLContext *context)
       priv->has_gl_framebuffer_blit = epoxy_has_gl_extension ("GL_EXT_framebuffer_blit");
       priv->has_frame_terminator = epoxy_has_gl_extension ("GL_GREMEDY_frame_terminator");
       priv->has_unpack_subimage = TRUE;
+
+      /* We asked for a core profile, but we didn't get one, so we're in legacy mode */
+      if (priv->gl_version < 32)
+        priv->is_legacy = TRUE;
     }
 
   if (!priv->use_es && G_UNLIKELY (_gdk_gl_flags & GDK_GL_TEXTURE_RECTANGLE))
@@ -823,7 +827,8 @@ gdk_gl_context_check_extensions (GdkGLContext *context)
     g_warning ("GL implementation doesn't support any form of non-power-of-two textures");
 
   GDK_NOTE (OPENGL,
-            g_message ("%s version: %d.%d\n"
+            g_message ("%s version: %d.%d (%s)\n"
+                       "* GLSL version: %s\n"
                        "* Extensions checked:\n"
                        " - GL_ARB_texture_non_power_of_two: %s\n"
                        " - GL_ARB_texture_rectangle: %s\n"
@@ -832,6 +837,8 @@ gdk_gl_context_check_extensions (GdkGLContext *context)
                        "* Using texture rectangle: %s",
                        priv->use_es ? "OpenGL ES" : "OpenGL",
                        priv->gl_version / 10, priv->gl_version % 10,
+                       priv->is_legacy ? "legacy" : "core",
+                       glGetString (GL_SHADING_LANGUAGE_VERSION),
                        has_npot ? "yes" : "no",
                        has_texture_rectangle ? "yes" : "no",
                        priv->has_gl_framebuffer_blit ? "yes" : "no",