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/*
* Copyright © 2016 Google, Inc.
* Copyright © 2018 Khaled Hosny
* Copyright © 2018 Ebrahim Byagowi
*
* 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, Behdad Esfahbod
*/
#if !defined(HB_OT_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
#error "Include <hb-ot.h> instead."
#endif
#ifndef HB_OT_COLOR_H
#define HB_OT_COLOR_H
#include "hb.h"
#include "hb-ot-name.h"
HB_BEGIN_DECLS
/*
* Color palettes.
*/
HB_EXTERN hb_bool_t
hb_ot_color_has_palettes (hb_face_t *face);
HB_EXTERN unsigned int
hb_ot_color_palette_get_count (hb_face_t *face);
HB_EXTERN hb_ot_name_id_t
hb_ot_color_palette_get_name_id (hb_face_t *face,
unsigned int palette_index);
HB_EXTERN hb_ot_name_id_t
hb_ot_color_palette_color_get_name_id (hb_face_t *face,
unsigned int color_index);
/**
* hb_ot_color_palette_flags_t:
* @HB_OT_COLOR_PALETTE_FLAG_DEFAULT: Default indicating that there is nothing special
* to note about a color palette.
* @HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND: Flag indicating that the color
* palette is appropriate to use when displaying the font on a light background such as white.
* @HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND: Flag indicating that the color
* palette is appropriate to use when displaying the font on a dark background such as black.
*
* Flags that describe the properties of color palette.
*
* Since: 2.1.0
*/
typedef enum { /*< flags >*/
HB_OT_COLOR_PALETTE_FLAG_DEFAULT = 0x00000000u,
HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND = 0x00000001u,
HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND = 0x00000002u
} hb_ot_color_palette_flags_t;
HB_EXTERN hb_ot_color_palette_flags_t
hb_ot_color_palette_get_flags (hb_face_t *face,
unsigned int palette_index);
HB_EXTERN unsigned int
hb_ot_color_palette_get_colors (hb_face_t *face,
unsigned int palette_index,
unsigned int start_offset,
unsigned int *color_count, /* IN/OUT. May be NULL. */
hb_color_t *colors /* OUT. May be NULL. */);
/*
* Color layers.
*/
HB_EXTERN hb_bool_t
hb_ot_color_has_layers (hb_face_t *face);
/**
* hb_ot_color_layer_t:
* @glyph: the glyph ID of the layer
* @color_index: the palette color index of the layer
*
* Pairs of glyph and color index.
*
* A color index of 0xFFFF does not refer to a palette
* color, but indicates that the foreground color should
* be used.
*
* Since: 2.1.0
**/
typedef struct hb_ot_color_layer_t {
hb_codepoint_t glyph;
unsigned int color_index;
} hb_ot_color_layer_t;
HB_EXTERN unsigned int
hb_ot_color_glyph_get_layers (hb_face_t *face,
hb_codepoint_t glyph,
unsigned int start_offset,
unsigned int *layer_count, /* IN/OUT. May be NULL. */
hb_ot_color_layer_t *layers /* OUT. May be NULL. */);
/* COLRv1 */
HB_EXTERN hb_bool_t
hb_ot_color_has_paint (hb_face_t *face);
HB_EXTERN hb_bool_t
hb_ot_color_glyph_has_paint (hb_face_t *face,
hb_codepoint_t glyph);
/*
* SVG
*/
HB_EXTERN hb_bool_t
hb_ot_color_has_svg (hb_face_t *face);
HB_EXTERN hb_blob_t *
hb_ot_color_glyph_reference_svg (hb_face_t *face, hb_codepoint_t glyph);
/*
* PNG: CBDT or sbix
*/
HB_EXTERN hb_bool_t
hb_ot_color_has_png (hb_face_t *face);
HB_EXTERN hb_blob_t *
hb_ot_color_glyph_reference_png (hb_font_t *font, hb_codepoint_t glyph);
HB_END_DECLS
#endif /* HB_OT_COLOR_H */
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