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1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #ifndef GR_H_
19 #define GR_H_
20 
21 #include <stdint.h>
22 #ifdef HAVE_ANDROID_OS      // just want PAGE_SIZE define
23 # include <asm/page.h>
24 #else
25 # include <sys/user.h>
26 #endif
27 #include <limits.h>
28 #include <sys/cdefs.h>
29 #include <hardware/gralloc.h>
30 #include <pthread.h>
31 #include <errno.h>
32 
33 #include <cutils/native_handle.h>
34 
35 /*****************************************************************************/
36 
37 struct private_module_t;
38 struct private_handle_t;
39 
roundUpToPageSize(size_t x)40 inline size_t roundUpToPageSize(size_t x) {
41     return (x + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
42 }
43 
ALIGN(size_t x,size_t align)44 inline size_t ALIGN(size_t x, size_t align) {
45     return (x + align-1) & ~(align-1);
46 }
47 
48 #define FALSE 0
49 #define TRUE  1
50 
51 int mapFrameBufferLocked(struct private_module_t* module);
52 int terminateBuffer(gralloc_module_t const* module, private_handle_t* hnd);
53 size_t getBufferSizeAndDimensions(int width, int height, int format,
54                                   int& alignedw, int &alignedh);
55 
56 int decideBufferHandlingMechanism(int format, const char *compositionUsed,
57                                   int hasBlitEngine, int *needConversion,
58                                   int *useBufferDirectly);
59 
60 // Allocate buffer from width, height, format into a private_handle_t
61 // It is the responsibility of the caller to free the buffer
62 int alloc_buffer(private_handle_t **pHnd, int w, int h, int format, int usage);
63 void free_buffer(private_handle_t *hnd);
64 
65 /*****************************************************************************/
66 
67 class Locker {
68     pthread_mutex_t mutex;
69     public:
70     class Autolock {
71         Locker& locker;
72         public:
Autolock(Locker & locker)73         inline Autolock(Locker& locker) : locker(locker) {  locker.lock(); }
~Autolock()74         inline ~Autolock() { locker.unlock(); }
75     };
Locker()76     inline Locker()        { pthread_mutex_init(&mutex, 0); }
~Locker()77     inline ~Locker()       { pthread_mutex_destroy(&mutex); }
lock()78     inline void lock()     { pthread_mutex_lock(&mutex); }
unlock()79     inline void unlock()   { pthread_mutex_unlock(&mutex); }
80 };
81 
82 #endif /* GR_H_ */
83