util_format_description(enum pipe_format format);
+/*
+ * Format query functions.
+ */
+
+static INLINE boolean
+util_format_is_compressed(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(format);
+ if (!format) {
+ return FALSE;
+ }
+
+ return desc->layout == UTIL_FORMAT_LAYOUT_DXT ? TRUE : FALSE;
+}
+
+static INLINE boolean
+util_format_is_depth_or_stencil(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(format);
+ if (!format) {
+ return FALSE;
+ }
+
+ return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS ? TRUE : FALSE;
+}
+
+
+/*
+ * Format access functions.
+ */
+
+void
+util_format_read_4f(enum pipe_format format,
+ float *dst, unsigned dst_stride,
+ const void *src, unsigned src_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_write_4f(enum pipe_format format,
+ const float *src, unsigned src_stride,
+ void *dst, unsigned dst_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_read_4ub(enum pipe_format format,
+ uint8_t *dst, unsigned dst_stride,
+ const void *src, unsigned src_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_write_4ub(enum pipe_format format,
+ const uint8_t *src, unsigned src_stride,
+ void *dst, unsigned dst_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
#endif /* ! U_FORMAT_H */