src/gallium/winsys/null/null_sw_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * Null software rasterizer winsys.
  31  *
  32  * There is no present support. Framebuffer data needs to be obtained via
  33  * transfers.
  34  *
  35  * @author Jose Fonseca
  36  */
  37
  38
  39 #include "pipe/p_format.h"
  40 #include "util/u_memory.h"
  41 #include "state_tracker/sw_winsys.h"
  42 #include "null_sw_winsys.h"
  43
  44
  45 static boolean
  46 null_sw_is_displaytarget_format_supported(struct sw_winsys *ws,
  47                                           unsigned tex_usage,
  48                                           enum pipe_format format )
  49 {
  50    return FALSE;
  51 }
  52
  53
  54 static void *
  55 null_sw_displaytarget_map(struct sw_winsys *ws,
  56                           struct sw_displaytarget *dt,
  57                           unsigned flags )
  58 {
  59    assert(0);
  60    return NULL;
  61 }
  62
  63
  64 static void
  65 null_sw_displaytarget_unmap(struct sw_winsys *ws,
  66                             struct sw_displaytarget *dt )
  67 {
  68    assert(0);
  69 }
  70
  71
  72 static void
  73 null_sw_displaytarget_destroy(struct sw_winsys *winsys,
  74                               struct sw_displaytarget *dt)
  75 {
  76    assert(0);
  77 }
  78
  79
  80 static struct sw_displaytarget *
  81 null_sw_displaytarget_create(struct sw_winsys *winsys,
  82                              unsigned tex_usage,
  83                              enum pipe_format format,
  84                              unsigned width, unsigned height,
  85                              unsigned alignment,
  86                              unsigned *stride)
  87 {
  88    return NULL;
  89 }
  90
  91
  92 static struct sw_displaytarget *
  93 null_sw_displaytarget_from_handle(struct sw_winsys *winsys,
  94                                   const struct pipe_texture *templet,
  95                                   struct winsys_handle *whandle,
  96                                   unsigned *stride)
  97 {
  98    return NULL;
  99 }
 100
 101
 102 static boolean
 103 null_sw_displaytarget_get_handle(struct sw_winsys *winsys,
 104                                  struct sw_displaytarget *dt,
 105                                  struct winsys_handle *whandle)
 106 {
 107    assert(0);
 108    return FALSE;
 109 }
 110
 111
 112 static void
 113 null_sw_displaytarget_display(struct sw_winsys *winsys,
 114                               struct sw_displaytarget *dt,
 115                               void *context_private)
 116 {
 117    assert(0);
 118 }
 119
 120
 121 static void
 122 null_sw_destroy(struct sw_winsys *winsys)
 123 {
 124    FREE(winsys);
 125 }
 126
 127
 128 struct sw_winsys *
 129 null_sw_create(void)
 130 {
 131    static struct sw_winsys *winsys;
 132
 133    winsys = CALLOC_STRUCT(sw_winsys);
 134    if (!winsys)
 135       return NULL;
 136
 137    winsys->destroy = null_sw_destroy;
 138    winsys->is_displaytarget_format_supported = null_sw_is_displaytarget_format_supported;
 139    winsys->displaytarget_create = null_sw_displaytarget_create;
 140    winsys->displaytarget_from_handle = null_sw_displaytarget_from_handle;
 141    winsys->displaytarget_get_handle = null_sw_displaytarget_get_handle;
 142    winsys->displaytarget_map = null_sw_displaytarget_map;
 143    winsys->displaytarget_unmap = null_sw_displaytarget_unmap;
 144    winsys->displaytarget_display = null_sw_displaytarget_display;
 145    winsys->displaytarget_destroy = null_sw_displaytarget_destroy;
 146
 147    return winsys;
 148 }