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1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  * Copyright (c) 2011-2012, The Linux Foundation. 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 #include <utils/Singleton.h>
35 
36 /*****************************************************************************/
37 
38 struct private_module_t;
39 struct private_handle_t;
40 
roundUpToPageSize(size_t x)41 inline size_t roundUpToPageSize(size_t x) {
42     return (x + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
43 }
44 
ALIGN(size_t x,size_t align)45 inline size_t ALIGN(size_t x, size_t align) {
46     return (x + align-1) & ~(align-1);
47 }
48 
49 #define FALSE 0
50 #define TRUE  1
51 
52 int mapFrameBufferLocked(struct private_module_t* module);
53 int terminateBuffer(gralloc_module_t const* module, private_handle_t* hnd);
54 size_t getBufferSizeAndDimensions(int width, int height, int format,
55                                   int& alignedw, int &alignedh);
56 
57 int decideBufferHandlingMechanism(int format, const char *compositionUsed,
58                                   int hasBlitEngine, int *needConversion,
59                                   int *useBufferDirectly);
60 
61 // Allocate buffer from width, height, format into a private_handle_t
62 // It is the responsibility of the caller to free the buffer
63 int alloc_buffer(private_handle_t **pHnd, int w, int h, int format, int usage);
64 void free_buffer(private_handle_t *hnd);
65 
66 /*****************************************************************************/
67 
68 class Locker {
69     pthread_mutex_t mutex;
70     public:
71     class Autolock {
72         Locker& locker;
73         public:
Autolock(Locker & locker)74         inline Autolock(Locker& locker) : locker(locker) {  locker.lock(); }
~Autolock()75         inline ~Autolock() { locker.unlock(); }
76     };
Locker()77     inline Locker()        { pthread_mutex_init(&mutex, 0); }
~Locker()78     inline ~Locker()       { pthread_mutex_destroy(&mutex); }
lock()79     inline void lock()     { pthread_mutex_lock(&mutex); }
unlock()80     inline void unlock()   { pthread_mutex_unlock(&mutex); }
81 };
82 
83 
84 class AdrenoMemInfo : public android::Singleton <AdrenoMemInfo>
85 {
86     public:
87     AdrenoMemInfo();
88 
89     ~AdrenoMemInfo();
90 
91     /*
92      * Function to compute the adreno stride based on the width and format.
93      *
94      * @return stride.
95      */
96     int getStride(int width, int format);
97 
98     private:
99         // Pointer to the padding library.
100         void *libadreno_utils;
101 
102         // link to the surface padding library.
103         int (*LINK_adreno_compute_padding) (int width, int bpp,
104                                                 int surface_tile_height,
105                                                 int screen_tile_height,
106                                                 int padding_threshold);
107 };
108 #endif /* GR_H_ */
109