1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#ifndef FLOATCOLOR_H
17#define FLOATCOLOR_H
18
19#include "utils/Color.h"
20#include "utils/Macros.h"
21#include "utils/MathUtils.h"
22
23#include <stdint.h>
24
25namespace android {
26namespace uirenderer {
27
28struct FloatColor {
29    // "color" is a gamma-encoded sRGB color
30    // After calling this method, the color is stored as a pre-multiplied linear color
31    // if linear blending is enabled. Otherwise, the color is stored as a pre-multiplied
32    // gamma-encoded sRGB color
33    void set(uint32_t color) {
34        a = ((color >> 24) & 0xff) / 255.0f;
35        r = a * EOCF(((color >> 16) & 0xff) / 255.0f);
36        g = a * EOCF(((color >> 8) & 0xff) / 255.0f);
37        b = a * EOCF(((color)&0xff) / 255.0f);
38    }
39
40    // "color" is a gamma-encoded sRGB color
41    // After calling this method, the color is stored as a un-premultiplied linear color
42    // if linear blending is enabled. Otherwise, the color is stored as a un-premultiplied
43    // gamma-encoded sRGB color
44    void setUnPreMultiplied(uint32_t color) {
45        a = ((color >> 24) & 0xff) / 255.0f;
46        r = EOCF(((color >> 16) & 0xff) / 255.0f);
47        g = EOCF(((color >> 8) & 0xff) / 255.0f);
48        b = EOCF(((color)&0xff) / 255.0f);
49    }
50
51    bool isNotBlack() { return a < 1.0f || r > 0.0f || g > 0.0f || b > 0.0f; }
52
53    bool operator==(const FloatColor& other) const {
54        return MathUtils::areEqual(r, other.r) && MathUtils::areEqual(g, other.g) &&
55               MathUtils::areEqual(b, other.b) && MathUtils::areEqual(a, other.a);
56    }
57
58    bool operator!=(const FloatColor& other) const { return !(*this == other); }
59
60    float r;
61    float g;
62    float b;
63    float a;
64};
65
66REQUIRE_COMPATIBLE_LAYOUT(FloatColor);
67
68} /* namespace uirenderer */
69} /* namespace android */
70
71#endif /* FLOATCOLOR_H */
72