rsUtils.h revision 52a9f5257141322219e4ce48b6980c9d14c80b1b 
1/*
2 * Copyright (C) 2009 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
17#ifndef ANDROID_RS_UTILS_H
18#define ANDROID_RS_UTILS_H
19
20#include <stdint.h>
21#include <sys/types.h>
22#include <stdlib.h>
23
24namespace android {
25namespace renderscript {
26
27#if 1
28#define rsAssert(v) do {if(!(v)) LOGE("rsAssert failed: %s, in %s at %i", #v, __FILE__, __LINE__);} while(0)
29#else
30#define rsAssert(v) while(0)
31#endif
32
33template<typename T>
34T rsMin(T in1, T in2)
35{
36    if (in1 > in2) {
37        return in2;
38    }
39    return in1;
40}
41
42template<typename T>
43T rsMax(T in1, T in2)
44{
45    if (in1 < in2) {
46        return in2;
47    }
48    return in1;
49}
50
51template<typename T>
52T rsFindHighBit(T val)
53{
54    uint32_t bit = 0;
55    while(val > 1) {
56        bit++;
57        val>>=1;
58    }
59    return bit;
60}
61
62template<typename T>
63bool rsIsPow2(T val)
64{
65    return (val & (val-1)) == 0;
66}
67
68template<typename T>
69T rsHigherPow2(T v)
70{
71    if (rsIsPow2(v)) {
72        return v;
73    }
74    return 1 << (rsFindHighBit(v) + 1);
75}
76
77template<typename T>
78T rsLowerPow2(T v)
79{
80    if (rsIsPow2(v)) {
81        return v;
82    }
83    return 1 << rsFindHighBit(v);
84}
85
86
87static inline uint16_t rs888to565(uint32_t r, uint32_t g, uint32_t b)
88{
89    uint16_t t = 0;
90    t |= b >> 3;
91    t |= (g >> 2) << 5;
92    t |= (r >> 3) << 11;
93    return t;
94}
95
96static inline uint16_t rsBoxFilter565(uint16_t i1, uint16_t i2, uint16_t i3, uint16_t i4)
97{
98    uint32_t r = ((i1 & 0x1f) + (i2 & 0x1f) + (i3 & 0x1f) + (i4 & 0x1f));
99    uint32_t g = ((i1 >> 5) & 0x3f) + ((i2 >> 5) & 0x3f) + ((i3 >> 5) & 0x3f) + ((i1 >> 5) & 0x3f);
100    uint32_t b = ((i1 >> 11) + (i2 >> 11) + (i3 >> 11) + (i4 >> 11));
101    return (r >> 2) | ((g >> 2) << 5) | ((b >> 2) << 11);
102}
103
104
105
106
107
108
109}
110}
111
112#endif //ANDROID_RS_OBJECT_BASE_H
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