1 /* 2 * Copyright (C) 2008 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_UI_PRIVATE_SW_GRALLOC_HANDLE_H 18 #define ANDROID_UI_PRIVATE_SW_GRALLOC_HANDLE_H 19 20 #include <stdint.h> 21 #include <limits.h> 22 #include <sys/cdefs.h> 23 #include <hardware/gralloc.h> 24 #include <errno.h> 25 26 #include <cutils/native_handle.h> 27 28 namespace android { 29 30 /*****************************************************************************/ 31 32 struct sw_gralloc_handle_t : public native_handle 33 { 34 // file-descriptors 35 int fd; 36 // ints 37 int magic; 38 int size; 39 int base; 40 int prot; 41 int pid; 42 43 static const int sNumInts = 5; 44 static const int sNumFds = 1; 45 static const int sMagic = '_sgh'; 46 sw_gralloc_handle_tsw_gralloc_handle_t47 sw_gralloc_handle_t() : 48 fd(-1), magic(sMagic), size(0), base(0), prot(0), pid(getpid()) 49 { 50 version = sizeof(native_handle); 51 numInts = sNumInts; 52 numFds = sNumFds; 53 } ~sw_gralloc_handle_tsw_gralloc_handle_t54 ~sw_gralloc_handle_t() { 55 magic = 0; 56 } 57 validatesw_gralloc_handle_t58 static int validate(const native_handle* h) { 59 const sw_gralloc_handle_t* hnd = (const sw_gralloc_handle_t*)h; 60 if (!h || h->version != sizeof(native_handle) || 61 h->numInts != sNumInts || h->numFds != sNumFds || 62 hnd->magic != sMagic) 63 { 64 return -EINVAL; 65 } 66 return 0; 67 } 68 69 static status_t alloc(uint32_t w, uint32_t h, int format, 70 int usage, buffer_handle_t* handle, int32_t* stride); 71 static status_t free(sw_gralloc_handle_t* hnd); 72 static status_t registerBuffer(sw_gralloc_handle_t* hnd); 73 static status_t unregisterBuffer(sw_gralloc_handle_t* hnd); 74 static status_t lock(sw_gralloc_handle_t* hnd, int usage, 75 int l, int t, int w, int h, void** vaddr); 76 static status_t unlock(sw_gralloc_handle_t* hnd); 77 }; 78 79 /*****************************************************************************/ 80 81 }; // namespace android 82 83 #endif /* ANDROID_UI_PRIVATE_SW_GRALLOC_HANDLE_H */ 84