1/*
2 * Copyright 2018 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef SkFontParameters_DEFINED
9#define SkFontParameters_DEFINED
10
11#include "include/core/SkScalar.h"
12#include "include/core/SkTypes.h"
13
14struct SkFontParameters {
15    struct Variation {
16        // Parameters in a variation font axis.
17        struct Axis {
18            constexpr Axis() : tag(0), min(0), def(0), max(0), flags(0) {}
19            constexpr Axis(SkFourByteTag tag, float min, float def, float max, bool hidden) :
20                tag(tag), min(min), def(def), max(max), flags(hidden ? HIDDEN : 0) {}
21
22            // Four character identifier of the font axis (weight, width, slant, italic...).
23            SkFourByteTag tag;
24            // Minimum value supported by this axis.
25            float min;
26            // Default value set by this axis.
27            float def;
28            // Maximum value supported by this axis. The maximum can equal the minimum.
29            float max;
30            // Return whether this axis is recommended to be remain hidden in user interfaces.
31            bool isHidden() const { return flags & HIDDEN; }
32            // Set this axis to be remain hidden in user interfaces.
33            void setHidden(bool hidden) { flags = hidden ? (flags | HIDDEN) : (flags & ~HIDDEN); }
34        private:
35            static constexpr uint16_t HIDDEN = 0x0001;
36            // Attributes for a font axis.
37            uint16_t flags;
38        };
39    };
40};
41
42#endif
43