src/mesa/state_tracker/st_cb_memoryobjects.c

   1 /*
   2  * Copyright © 2017 Red Hat.
   3  * Copyright © 2017 Valve Corporation.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "main/imports.h"
  26 #include "main/mtypes.h"
  27
  28 #include "main/externalobjects.h"
  29
  30 #include "st_context.h"
  31 #include "st_cb_memoryobjects.h"
  32
  33 #include "state_tracker/drm_driver.h"
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_screen.h"
  36
  37 static struct gl_memory_object *
  38 st_memoryobj_alloc(struct gl_context *ctx, GLuint name)
  39 {
  40    struct st_memory_object *st_obj = ST_CALLOC_STRUCT(st_memory_object);
  41    if (!st_obj)
  42       return NULL;
  43
  44    _mesa_initialize_memory_object(ctx, &st_obj->Base, name);
  45    return &st_obj->Base;
  46 }
  47
  48 static void
  49 st_memoryobj_free(struct gl_context *ctx,
  50                   struct gl_memory_object *obj)
  51 {
  52    _mesa_delete_memory_object(ctx, obj);
  53 }
  54
  55
  56 static void
  57 st_import_memoryobj_fd(struct gl_context *ctx,
  58                        struct gl_memory_object *obj,
  59                        GLuint64 size,
  60                        int fd)
  61 {
  62    struct st_memory_object *st_obj = st_memory_object(obj);
  63    struct st_context *st = st_context(ctx);
  64    struct pipe_context *pipe = st->pipe;
  65    struct pipe_screen *screen = pipe->screen;
  66    struct winsys_handle whandle;
  67
  68    whandle.type = WINSYS_HANDLE_TYPE_FD;
  69    whandle.handle = fd;
  70    whandle.offset = 0;
  71    whandle.layer = 0;
  72    whandle.stride = 0;
  73
  74    st_obj->memory = screen->memobj_create_from_handle(screen,
  75                                                       &whandle,
  76                                                       obj->Dedicated);
  77
  78 #if !defined(_WIN32)
  79    /* We own fd, but we no longer need it. So get rid of it */
  80    close(fd);
  81 #endif
  82 }
  83
  84 void
  85 st_init_memoryobject_functions(struct dd_function_table *functions)
  86 {
  87    functions->NewMemoryObject = st_memoryobj_alloc;
  88    functions->DeleteMemoryObject = st_memoryobj_free;
  89    functions->ImportMemoryObjectFd = st_import_memoryobj_fd;
  90 }