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      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 };
    108