[gtk/wip/chergert/glproto] next: fix error messages for shader nodes

[Christian Hergert <chergert src gnome org>]

commit 1c3da891829cac3253fc0de86584b7ca8cd1c68d
Author: Christian Hergert <chergert redhat com>
Date:   Tue Feb 23 12:59:51 2021 -0800

    next: fix error messages for shader nodes

 gsk/next/gskgldriver.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gsk/next/gskgldriver.c b/gsk/next/gskgldriver.c
index efe098643b..a5eaaedac9 100644
--- a/gsk/next/gskgldriver.c
+++ b/gsk/next/gskgldriver.c
@@ -998,7 +998,8 @@ gsk_next_driver_lookup_shader (GskNextDriver  *self,
           g_set_error (error,
                        GDK_GL_ERROR,
                        GDK_GL_ERROR_UNSUPPORTED_FORMAT,
-                       "GLShaderNode supports max %d custom uniforms",
+                       "Tried to use %d uniforms, while only %d is supported",
+                       n_uniforms,
                        (int)G_N_ELEMENTS (program->args_locations));
           return NULL;
         }
@@ -1009,7 +1010,8 @@ gsk_next_driver_lookup_shader (GskNextDriver  *self,
           g_set_error (error,
                        GDK_GL_ERROR,
                        GDK_GL_ERROR_UNSUPPORTED_FORMAT,
-                       "GLShaderNode supports max %d texture sources",
+                       "Tried to use %d textures, while only %d is supported",
+                       n_required_textures,
                        (int)(G_N_ELEMENTS (program->texture_locations)));
           return NULL;
         }