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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 
     41 inline size_t roundUpToPageSize(size_t x) {
     42     return (x + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
     43 }
     44 
     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:
     74         inline Autolock(Locker& locker) : locker(locker) {  locker.lock(); }
     75         inline ~Autolock() { locker.unlock(); }
     76     };
     77     inline Locker()        { pthread_mutex_init(&mutex, 0); }
     78     inline ~Locker()       { pthread_mutex_destroy(&mutex); }
     79     inline void lock()     { pthread_mutex_lock(&mutex); }
     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