/*
 * Copyright (C) 2010-2011 ARM Limited. All rights reserved.
 *
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef GRALLOC_PRIV_H_
#define GRALLOC_PRIV_H_

#include <stdint.h>
#include <pthread.h>
#include <errno.h>
#include <linux/fb.h>

#include <hardware/gralloc.h>
#include <cutils/native_handle.h>

#include "ump.h"

/*
 * HWC_HWOVERLAY is flag for location of glFinish().
 * Enable this define if you want that glFinish() is in HWComposer.
 * If you disable this define, glFinish() is called in threadloop().
 */
#define HWC_HWOVERLAY 1

#define GRALLOC_ARM_UMP_MODULE 1

struct private_handle_t;

struct private_module_t
{
    gralloc_module_t base;

    private_handle_t* framebuffer;
    uint32_t flags;
    uint32_t numBuffers;
    uint32_t bufferMask;
    pthread_mutex_t lock;
    buffer_handle_t currentBuffer;
    int ion_client;

    struct fb_var_screeninfo info;
    struct fb_fix_screeninfo finfo;
    float xdpi;
    float ydpi;
    float fps;

    enum {
        PRIV_USAGE_LOCKED_FOR_POST = 0x80000000
    };
};

#ifdef __cplusplus
struct private_handle_t : public native_handle
{
#else
struct private_handle_t
{
    struct native_handle nativeHandle;
#endif

    enum {
        PRIV_FLAGS_FRAMEBUFFER = 0x00000001,
        PRIV_FLAGS_USES_UMP    = 0x00000002,
        PRIV_FLAGS_USES_ION    = 0x00000020,
    };

    enum {
        LOCK_STATE_WRITE     =   1<<31,
        LOCK_STATE_MAPPED    =   1<<30,
        LOCK_STATE_READ_MASK =   0x3FFFFFFF
    };

    // Following member is for ION memory only
    int     fd;
    int     magic;
    int     flags;
    int     size;
    int     base;
    int     lockState;
    int     writeOwner;
    int     pid;

    // Following members are for UMP memory only
    ump_secure_id  ump_id;
    ump_handle     ump_mem_handle;

    // Following members is for framebuffer only
    int     offset;
    int     paddr;

    int     format;
    int     usage;
    int     width;
    int     height;
    int     bpp;
    int     stride;

    /* Following members are for YUV information */
    unsigned int yaddr;
    unsigned int uoffset;
    unsigned int voffset;
    int     ion_client;

#ifdef __cplusplus
    static const int sNumInts = 21;
    static const int sNumFds = 1;
    static const int sMagic = 0x3141592;

    private_handle_t(int flags, int size, int base, int lock_state, ump_secure_id secure_id, ump_handle handle):
        magic(sMagic),
        flags(flags),
        size(size),
        base(base),
        lockState(lock_state),
        writeOwner(0),
        pid(getpid()),
        ump_id(secure_id),
        ump_mem_handle(handle),
        fd(0),
        format(0),
        usage(0),
        width(0),
        height(0),
        bpp(0),
        stride(0),
        yaddr(0),
        uoffset(0),
        voffset(0),
        offset(0)
    {
        version = sizeof(native_handle);
        numFds = sNumFds;
        numInts = sNumInts;
    }

    private_handle_t(int flags, int size, int base, int lock_state, int fb_file, int fb_offset):
        magic(sMagic),
        flags(flags),
        size(size),
        base(base),
        lockState(lock_state),
        writeOwner(0),
        pid(getpid()),
        ump_id(UMP_INVALID_SECURE_ID),
        ump_mem_handle(UMP_INVALID_MEMORY_HANDLE),
        fd(fb_file),
        format(0),
        usage(0),
        width(0),
        height(0),
        bpp(0),
        stride(0),
        yaddr(0),
        uoffset(0),
        voffset(0),
        offset(fb_offset)
    {
        version = sizeof(native_handle);
        numFds = sNumFds;
        numInts = sNumInts;
    }

    ~private_handle_t()
    {
        magic = 0;
    }

    bool usesPhysicallyContiguousMemory()
    {
        return (flags & PRIV_FLAGS_FRAMEBUFFER) ? true : false;
    }

    static int validate(const native_handle* h)
    {
        const private_handle_t* hnd = (const private_handle_t*)h;

        if (!h || h->version != sizeof(native_handle) ||
            h->numInts != sNumInts ||
            h->numFds != sNumFds ||
            hnd->magic != sMagic)
            return -EINVAL;

        return 0;
    }

    static private_handle_t* dynamicCast(const native_handle* in)
    {
        if (validate(in) == 0)
            return (private_handle_t*) in;

        return NULL;
    }
#endif
};

#endif /* GRALLOC_PRIV_H_ */