+static inline bool
+_mesa_attr_zero_aliases_vertex(struct gl_context *ctx)
+{
+ const bool is_forward_compatible_context =
+ ctx->Const.ContextFlags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
+
+ /* In OpenGL 3.1 attribute 0 becomes non-magic, just like in OpenGL ES
+ * 2.0. Note that we cannot just check for API_OPENGL_COMPAT here because
+ * that will erroneously allow this usage in a 3.0 forward-compatible
+ * context too.
+ */
+ return (ctx->API == API_OPENGLES
+ || (ctx->API == API_OPENGL_COMPAT
+ && !is_forward_compatible_context));
+}
+
+extern void
+_mesa_update_array_format(struct gl_context *ctx,
+ struct gl_vertex_array_object *vao,
+ GLuint attrib, GLint size, GLenum type,
+ GLenum format, GLboolean normalized,
+ GLboolean integer, GLboolean doubles,
+ GLuint relativeOffset, bool flush_vertices);
+
+extern void
+_mesa_enable_vertex_array_attrib(struct gl_context *ctx,
+ struct gl_vertex_array_object *vao,
+ unsigned attrib);
+
+extern void
+_mesa_bind_vertex_buffer(struct gl_context *ctx,
+ struct gl_vertex_array_object *vao,
+ GLuint index,
+ struct gl_buffer_object *vbo,
+ GLintptr offset, GLsizei stride);
+