src/mesa/state_tracker/st_cb_memoryobjects.c

   1 #include "main/imports.h"
   2 #include "main/mtypes.h"
   3
   4 #include "main/externalobjects.h"
   5
   6 #include "st_context.h"
   7 #include "st_cb_memoryobjects.h"
   8
   9 #include "state_tracker/drm_driver.h"
  10 #include "pipe/p_context.h"
  11 #include "pipe/p_screen.h"
  12
  13 static struct gl_memory_object *
  14 st_memoryobj_alloc(struct gl_context *ctx, GLuint name)
  15 {
  16    struct st_memory_object *st_obj = ST_CALLOC_STRUCT(st_memory_object);
  17    if (!st_obj)
  18       return NULL;
  19
  20    _mesa_initialize_memory_object(ctx, &st_obj->Base, name);
  21    return &st_obj->Base;
  22 }
  23
  24 static void
  25 st_memoryobj_free(struct gl_context *ctx,
  26                   struct gl_memory_object *obj)
  27 {
  28    _mesa_delete_memory_object(ctx, obj);
  29 }
  30
  31
  32 static void
  33 st_import_memoryobj_fd(struct gl_context *ctx,
  34                        struct gl_memory_object *obj,
  35                        GLuint64 size,
  36                        int fd)
  37 {
  38    struct st_memory_object *st_obj = st_memory_object(obj);
  39    struct st_context *st = st_context(ctx);
  40    struct pipe_context *pipe = st->pipe;
  41    struct pipe_screen *screen = pipe->screen;
  42    struct winsys_handle whandle;
  43
  44    whandle.type = DRM_API_HANDLE_TYPE_FD;
  45    whandle.handle = fd;
  46    whandle.offset = 0;
  47    whandle.layer = 0;
  48    whandle.stride = 0;
  49
  50    st_obj->memory = screen->memobj_create_from_handle(screen,
  51                                                       &whandle,
  52                                                       obj->Dedicated);
  53
  54    /* We own fd, but we no longer need it. So get rid of it */
  55    close(fd);
  56 }
  57
  58 void
  59 st_init_memoryobject_functions(struct dd_function_table *functions)
  60 {
  61    functions->NewMemoryObject = st_memoryobj_alloc;
  62    functions->DeleteMemoryObject = st_memoryobj_free;
  63    functions->ImportMemoryObjectFd = st_import_memoryobj_fd;
  64 }