+ /**
+ * \brief Layout qualifier for gl_FragDepth.
+ *
+ * This is not equal to \c ir_depth_layout_none if and only if this
+ * variable is \c gl_FragDepth and a layout qualifier is specified.
+ */
+ ir_depth_layout depth_layout;
+
+ /**
+ * Storage location of the base of this variable
+ *
+ * The precise meaning of this field depends on the nature of the variable.
+ *
+ * - Vertex shader input: one of the values from \c gl_vert_attrib.
+ * - Vertex shader output: one of the values from \c gl_varying_slot.
+ * - Geometry shader input: one of the values from \c gl_varying_slot.
+ * - Geometry shader output: one of the values from \c gl_varying_slot.
+ * - Fragment shader input: one of the values from \c gl_varying_slot.
+ * - Fragment shader output: one of the values from \c gl_frag_result.
+ * - Uniforms: Per-stage uniform slot number for default uniform block.
+ * - Uniforms: Index within the uniform block definition for UBO members.
+ * - Other: This field is not currently used.
+ *
+ * If the variable is a uniform, shader input, or shader output, and the
+ * slot has not been assigned, the value will be -1.
+ */
+ int location;
+
+ /**
+ * Vertex stream output identifier.
+ */
+ unsigned stream;
+
+ /**
+ * output index for dual source blending.
+ */
+ int index;
+
+ /**
+ * Initial binding point for a sampler or UBO.
+ *
+ * For array types, this represents the binding point for the first element.
+ */
+ int binding;
+
+ /**
+ * Location an atomic counter is stored at.
+ */
+ struct {
+ unsigned buffer_index;
+ unsigned offset;
+ } atomic;
+
+ /**
+ * ARB_shader_image_load_store qualifiers.
+ */
+ struct {
+ bool read_only; /**< "readonly" qualifier. */
+ bool write_only; /**< "writeonly" qualifier. */
+ bool coherent;
+ bool _volatile;
+ bool restrict_flag;
+
+ /** Image internal format if specified explicitly, otherwise GL_NONE. */
+ GLenum format;
+ } image;
+
+ /**
+ * Highest element accessed with a constant expression array index
+ *
+ * Not used for non-array variables.
+ */
+ unsigned max_array_access;
+
+ } data;