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      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
     69     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.
     77     void incStrong(const void* /*id*/) const {
     78         common.incRef(const_cast<android_native_base_t*>(&common));
     79     }
     80     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