src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2012 Francisco Jerez
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "pipe_loader_priv.h"
  29
  30 #include "util/u_memory.h"
  31 #include "util/u_dl.h"
  32 #include "sw/null/null_sw_winsys.h"
  33 #include "target-helpers/inline_sw_helper.h"
  34 #include "state_tracker/xlib_sw_winsys.h"
  35
  36 struct pipe_loader_sw_device {
  37    struct pipe_loader_device base;
  38    struct util_dl_library *lib;
  39    struct sw_winsys *ws;
  40 };
  41
  42 #define pipe_loader_sw_device(dev) ((struct pipe_loader_sw_device *)dev)
  43
  44 static struct pipe_loader_ops pipe_loader_sw_ops;
  45
  46 static struct sw_winsys *(*backends[])() = {
  47 #ifdef HAVE_WINSYS_XLIB
  48    x11_sw_create,
  49 #endif
  50    null_sw_create
  51 };
  52
  53 int
  54 pipe_loader_sw_probe(struct pipe_loader_device **devs, int ndev)
  55 {
  56    int i;
  57
  58    for (i = 0; i < Elements(backends); i++) {
  59       if (i < ndev) {
  60          struct pipe_loader_sw_device *sdev = CALLOC_STRUCT(pipe_loader_sw_device);
  61
  62          sdev->base.type = PIPE_LOADER_DEVICE_SOFTWARE;
  63          sdev->base.driver_name = "swrast";
  64          sdev->base.ops = &pipe_loader_sw_ops;
  65          sdev->ws = backends[i]();
  66          devs[i] = &sdev->base;
  67       }
  68    }
  69
  70    return i;
  71 }
  72
  73 static void
  74 pipe_loader_sw_release(struct pipe_loader_device **dev)
  75 {
  76    struct pipe_loader_sw_device *sdev = pipe_loader_sw_device(*dev);
  77
  78    if (sdev->lib)
  79       util_dl_close(sdev->lib);
  80
  81    FREE(sdev);
  82    *dev = NULL;
  83 }
  84
  85 static struct pipe_screen *
  86 pipe_loader_sw_create_screen(struct pipe_loader_device *dev,
  87                              const char *library_paths)
  88 {
  89    struct pipe_loader_sw_device *sdev = pipe_loader_sw_device(dev);
  90    struct pipe_screen *(*init)(struct sw_winsys *);
  91
  92    if (!sdev->lib)
  93       sdev->lib = pipe_loader_find_module(dev, library_paths);
  94    if (!sdev->lib)
  95       return NULL;
  96
  97    init = (void *)util_dl_get_proc_address(sdev->lib, "swrast_create_screen");
  98    if (!init)
  99       return NULL;
 100
 101    return init(sdev->ws);
 102 }
 103
 104 static struct pipe_loader_ops pipe_loader_sw_ops = {
 105    .create_screen = pipe_loader_sw_create_screen,
 106    .release = pipe_loader_sw_release
 107 };