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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 #include <sys/user.h>
     23 #include <limits.h>
     24 #include <sys/cdefs.h>
     25 #include <hardware/gralloc.h>
     26 #include <pthread.h>
     27 #include <errno.h>
     28 
     29 #include <cutils/native_handle.h>
     30 #include <utils/Singleton.h>
     31 
     32 /*****************************************************************************/
     33 
     34 struct private_module_t;
     35 struct private_handle_t;
     36 
     37 inline size_t roundUpToPageSize(size_t x) {
     38     return (x + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
     39 }
     40 
     41 inline size_t ALIGN(size_t x, size_t align) {
     42     return (x + align-1) & ~(align-1);
     43 }
     44 
     45 #define FALSE 0
     46 #define TRUE  1
     47 
     48 int mapFrameBufferLocked(struct private_module_t* module);
     49 int terminateBuffer(gralloc_module_t const* module, private_handle_t* hnd);
     50 size_t getBufferSizeAndDimensions(int width, int height, int format,
     51                                   int& alignedw, int &alignedh);
     52 
     53 int decideBufferHandlingMechanism(int format, const char *compositionUsed,
     54                                   int hasBlitEngine, int *needConversion,
     55                                   int *useBufferDirectly);
     56 
     57 // Allocate buffer from width, height, format into a private_handle_t
     58 // It is the responsibility of the caller to free the buffer
     59 int alloc_buffer(private_handle_t **pHnd, int w, int h, int format, int usage);
     60 void free_buffer(private_handle_t *hnd);
     61 
     62 /*****************************************************************************/
     63 
     64 class Locker {
     65     pthread_mutex_t mutex;
     66     public:
     67     class Autolock {
     68         Locker& locker;
     69         public:
     70         inline Autolock(Locker& locker) : locker(locker) {  locker.lock(); }
     71         inline ~Autolock() { locker.unlock(); }
     72     };
     73     inline Locker()        { pthread_mutex_init(&mutex, 0); }
     74     inline ~Locker()       { pthread_mutex_destroy(&mutex); }
     75     inline void lock()     { pthread_mutex_lock(&mutex); }
     76     inline void unlock()   { pthread_mutex_unlock(&mutex); }
     77 };
     78 
     79 
     80 class AdrenoMemInfo : public android::Singleton <AdrenoMemInfo>
     81 {
     82     public:
     83     AdrenoMemInfo();
     84 
     85     ~AdrenoMemInfo();
     86 
     87     /*
     88      * Function to compute the adreno stride based on the width and format.
     89      *
     90      * @return stride.
     91      */
     92     int getStride(int width, int format);
     93 
     94     private:
     95         // Pointer to the padding library.
     96         void *libadreno_utils;
     97 
     98         // link to the surface padding library.
     99         int (*LINK_adreno_compute_padding) (int width, int bpp,
    100                                                 int surface_tile_height,
    101                                                 int screen_tile_height,
    102                                                 int padding_threshold);
    103 };
    104 #endif /* GR_H_ */
    105