[color] Minimal API for COLR/CPAL
diff --git a/src/hb-ot-color.h b/src/hb-ot-color.h
new file mode 100644
index 0000000..5b9e5aa
--- /dev/null
+++ b/src/hb-ot-color.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright © 2016 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Sascha Brawer
+ */
+
+#ifndef HB_OT_H_IN
+#error "Include <hb-ot.h> instead."
+#endif
+
+#ifndef HB_OT_COLOR_H
+#define HB_OT_COLOR_H
+
+#include "hb.h"
+
+HB_BEGIN_DECLS
+
+/*
+ * CPAL -- Color Palette
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/cpal
+ */
+#define HB_OT_TAG_CPAL HB_TAG('C','P','A','L')
+
+/**
+ * hb_ot_color_t:
+ * ARGB data type for holding color values.
+ *
+ * Since: REPLACEME
+ */
+typedef uint32_t hb_ot_color_t;
+
+HB_EXTERN hb_bool_t
+hb_ot_color_has_cpal_data (hb_face_t *face);
+
+HB_EXTERN hb_bool_t
+hb_ot_color_has_colr_data (hb_face_t *face);
+
+HB_EXTERN unsigned int
+hb_ot_color_get_palette_count (hb_face_t *face);
+
+// HB_EXTERN unsigned int
+// hb_ot_color_get_palette_name_id (hb_face_t *face, unsigned int palette);
+
+// HB_EXTERN hb_ot_color_palette_flags_t
+// hb_ot_color_get_palette_flags (hb_face_t *face, unsigned int palette);
+
+HB_EXTERN unsigned int
+hb_ot_color_get_palette_colors (hb_face_t *face,
+ unsigned int palette, /* default=0 */
+ unsigned int start_offset,
+ unsigned int *color_count /* IN/OUT */,
+ hb_ot_color_t *colors /* OUT */);
+
+
+HB_EXTERN unsigned int
+hb_ot_color_get_color_layers (hb_face_t *face,
+ hb_codepoint_t gid,
+ unsigned int offset,
+ unsigned int *count, /* IN/OUT */
+ hb_codepoint_t *gids, /* OUT */
+ unsigned int *color_indices /* OUT */);
+
+HB_END_DECLS
+
+#endif /* HB_OT_COLOR_H */
