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      1 /*
      2  * Copyright  2011 Intel Corporation
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
     19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  * DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors:
     25  *    Benjamin Franzke <benjaminfranzke (at) googlemail.com>
     26  */
     27 
     28 #ifndef INTERNAL_H_
     29 #define INTERNAL_H_
     30 
     31 #include "gbm.h"
     32 #include <sys/stat.h>
     33 
     34 /* GCC visibility */
     35 #if defined(__GNUC__) && __GNUC__ >= 4
     36 #define GBM_EXPORT __attribute__ ((visibility("default")))
     37 #else
     38 #define GBM_EXPORT
     39 #endif
     40 
     41 /**
     42  * \file gbmint.h
     43  * \brief Internal implementation details of gbm
     44  */
     45 
     46 /**
     47  * The device used for the memory allocation.
     48  *
     49  * The members of this structure should be not accessed directly
     50  */
     51 struct gbm_device {
     52    /* Hack to make a gbm_device detectable by its first element. */
     53    struct gbm_device *(*dummy)(int);
     54 
     55    int fd;
     56    const char *name;
     57    unsigned int refcount;
     58    struct stat stat;
     59 
     60    void (*destroy)(struct gbm_device *gbm);
     61    int (*is_format_supported)(struct gbm_device *gbm,
     62                               uint32_t format,
     63                               uint32_t usage);
     64 
     65    struct gbm_bo *(*bo_create)(struct gbm_device *gbm,
     66                                uint32_t width, uint32_t height,
     67                                uint32_t format,
     68                                uint32_t usage);
     69    struct gbm_bo *(*bo_import)(struct gbm_device *gbm, uint32_t type,
     70                                void *buffer, uint32_t usage);
     71    int (*bo_write)(struct gbm_bo *bo, const void *buf, size_t data);
     72    void (*bo_destroy)(struct gbm_bo *bo);
     73 
     74    struct gbm_surface *(*surface_create)(struct gbm_device *gbm,
     75                                          uint32_t width, uint32_t height,
     76                                          uint32_t format, uint32_t flags);
     77    struct gbm_bo *(*surface_lock_front_buffer)(struct gbm_surface *surface);
     78    void (*surface_release_buffer)(struct gbm_surface *surface,
     79                                   struct gbm_bo *bo);
     80    int (*surface_has_free_buffers)(struct gbm_surface *surface);
     81    void (*surface_destroy)(struct gbm_surface *surface);
     82 };
     83 
     84 /**
     85  * The allocated buffer object.
     86  *
     87  * The members in this structure should not be accessed directly.
     88  */
     89 struct gbm_bo {
     90    struct gbm_device *gbm;
     91    uint32_t width;
     92    uint32_t height;
     93    uint32_t stride;
     94    uint32_t format;
     95    union gbm_bo_handle  handle;
     96    void *user_data;
     97    void (*destroy_user_data)(struct gbm_bo *, void *);
     98 };
     99 
    100 struct gbm_surface {
    101    struct gbm_device *gbm;
    102    uint32_t width;
    103    uint32_t height;
    104    uint32_t format;
    105    uint32_t flags;
    106 };
    107 
    108 struct gbm_backend {
    109    const char *backend_name;
    110    struct gbm_device *(*create_device)(int fd);
    111 };
    112 
    113 GBM_EXPORT struct gbm_device *
    114 _gbm_mesa_get_device(int fd);
    115 
    116 #endif
    117