1 /*
2  * Copyright (C) 2017 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 #pragma once
18 
19 #include <stdint.h>
20 #include <stdbool.h>
21 #include <string.h>
22 #include <sys/cdefs.h>
23 #include <system/graphics-base.h>
24 #include <cutils/native_handle.h>
25 
26 __BEGIN_DECLS
27 
28 #ifdef __cplusplus
29 #define ANDROID_NATIVE_UNSIGNED_CAST(x) static_cast<unsigned int>(x)
30 #else
31 #define ANDROID_NATIVE_UNSIGNED_CAST(x) ((unsigned int)(x))
32 #endif
33 
34 #define ANDROID_NATIVE_MAKE_CONSTANT(a,b,c,d)  \
35     ((ANDROID_NATIVE_UNSIGNED_CAST(a) << 24) | \
36      (ANDROID_NATIVE_UNSIGNED_CAST(b) << 16) | \
37      (ANDROID_NATIVE_UNSIGNED_CAST(c) <<  8) | \
38      (ANDROID_NATIVE_UNSIGNED_CAST(d)))
39 
40 #define ANDROID_NATIVE_BUFFER_MAGIC     ANDROID_NATIVE_MAKE_CONSTANT('_','b','f','r')
41 
42 
43 typedef struct android_native_base_t
44 {
45     /* a magic value defined by the actual EGL native type */
46     int magic;
47 
48     /* the sizeof() of the actual EGL native type */
49     int version;
50 
51     void* reserved[4];
52 
53     /* reference-counting interface */
54     void (*incRef)(struct android_native_base_t* base);
55     void (*decRef)(struct android_native_base_t* base);
56 } android_native_base_t;
57 
58 typedef struct android_native_rect_t
59 {
60     int32_t left;
61     int32_t top;
62     int32_t right;
63     int32_t bottom;
64 } android_native_rect_t;
65 
66 typedef struct ANativeWindowBuffer
67 {
68 #ifdef __cplusplus
ANativeWindowBufferANativeWindowBuffer69     ANativeWindowBuffer() {
70         common.magic = ANDROID_NATIVE_BUFFER_MAGIC;
71         common.version = sizeof(ANativeWindowBuffer);
72         memset(common.reserved, 0, sizeof(common.reserved));
73     }
74 
75     // Implement the methods that sp<ANativeWindowBuffer> expects so that it
76     // can be used to automatically refcount ANativeWindowBuffer's.
incStrongANativeWindowBuffer77     void incStrong(const void* /*id*/) const {
78         common.incRef(const_cast<android_native_base_t*>(&common));
79     }
decStrongANativeWindowBuffer80     void decStrong(const void* /*id*/) const {
81         common.decRef(const_cast<android_native_base_t*>(&common));
82     }
83 #endif
84 
85     struct android_native_base_t common;
86 
87     int width;
88     int height;
89     int stride;
90     int format;
91     int usage_deprecated;
92     uintptr_t layerCount;
93 
94     void* reserved[1];
95 
96     const native_handle_t* handle;
97     uint64_t usage;
98 
99     // we needed extra space for storing the 64-bits usage flags
100     // the number of slots to use from reserved_proc depends on the
101     // architecture.
102     void* reserved_proc[8 - (sizeof(uint64_t) / sizeof(void*))];
103 } ANativeWindowBuffer_t;
104 
105 typedef struct ANativeWindowBuffer ANativeWindowBuffer;
106 
107 // Old typedef for backwards compatibility.
108 typedef ANativeWindowBuffer_t android_native_buffer_t;
109 
110 __END_DECLS
111