FloatColor.h revision 253f2c213f6ecda63b6872aee77bd30d5ec07c82 
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    void set(uint32_t color) {
32        a = ((color >> 24) & 0xff) / 255.0f;
33        r = a * EOCF_sRGB(((color >> 16) & 0xff) / 255.0f);
34        g = a * EOCF_sRGB(((color >>  8) & 0xff) / 255.0f);
35        b = a * EOCF_sRGB(((color      ) & 0xff) / 255.0f);
36    }
37
38    bool isNotBlack() {
39        return a < 1.0f
40                || r > 0.0f
41                || g > 0.0f
42                || b > 0.0f;
43    }
44
45    bool operator==(const FloatColor& other) const {
46        return MathUtils::areEqual(r, other.r)
47                && MathUtils::areEqual(g, other.g)
48                && MathUtils::areEqual(b, other.b)
49                && MathUtils::areEqual(a, other.a);
50    }
51
52    bool operator!=(const FloatColor& other) const {
53        return !(*this == other);
54    }
55
56    float r;
57    float g;
58    float b;
59    float a;
60};
61
62REQUIRE_COMPATIBLE_LAYOUT(FloatColor);
63
64} /* namespace uirenderer */
65} /* namespace android */
66
67#endif /* FLOATCOLOR_H */
68