src/gallium/winsys/sw/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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  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  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 #include <stdio.h>
  39
  40 #include "pipe/p_format.h"
  41 #include "util/u_memory.h"
  42 #include "state_tracker/sw_winsys.h"
  43 #include "null_sw_winsys.h"
  44
  45
  46 static bool
  47 null_sw_is_displaytarget_format_supported(struct sw_winsys *ws,
  48                                           unsigned tex_usage,
  49                                           enum pipe_format format )
  50 {
  51    return false;
  52 }
  53
  54
  55 static void *
  56 null_sw_displaytarget_map(struct sw_winsys *ws,
  57                           struct sw_displaytarget *dt,
  58                           unsigned flags )
  59 {
  60    assert(0);
  61    return NULL;
  62 }
  63
  64
  65 static void
  66 null_sw_displaytarget_unmap(struct sw_winsys *ws,
  67                             struct sw_displaytarget *dt )
  68 {
  69    assert(0);
  70 }
  71
  72
  73 static void
  74 null_sw_displaytarget_destroy(struct sw_winsys *winsys,
  75                               struct sw_displaytarget *dt)
  76 {
  77    assert(0);
  78 }
  79
  80
  81 static struct sw_displaytarget *
  82 null_sw_displaytarget_create(struct sw_winsys *winsys,
  83                              unsigned tex_usage,
  84                              enum pipe_format format,
  85                              unsigned width, unsigned height,
  86                              unsigned alignment,
  87                              const void *front_private,
  88                              unsigned *stride)
  89 {
  90    fprintf(stderr, "null_sw_displaytarget_create() returning NULL\n");
  91    return NULL;
  92 }
  93
  94
  95 static struct sw_displaytarget *
  96 null_sw_displaytarget_from_handle(struct sw_winsys *winsys,
  97                                   const struct pipe_resource *templat,
  98                                   struct winsys_handle *whandle,
  99                                   unsigned *stride)
 100 {
 101    return NULL;
 102 }
 103
 104
 105 static bool
 106 null_sw_displaytarget_get_handle(struct sw_winsys *winsys,
 107                                  struct sw_displaytarget *dt,
 108                                  struct winsys_handle *whandle)
 109 {
 110    assert(0);
 111    return false;
 112 }
 113
 114
 115 static void
 116 null_sw_displaytarget_display(struct sw_winsys *winsys,
 117                               struct sw_displaytarget *dt,
 118                               void *context_private,
 119                               struct pipe_box *box)
 120 {
 121    assert(0);
 122 }
 123
 124
 125 static void
 126 null_sw_destroy(struct sw_winsys *winsys)
 127 {
 128    FREE(winsys);
 129 }
 130
 131
 132 struct sw_winsys *
 133 null_sw_create(void)
 134 {
 135    static struct sw_winsys *winsys;
 136
 137    winsys = CALLOC_STRUCT(sw_winsys);
 138    if (!winsys)
 139       return NULL;
 140
 141    winsys->destroy = null_sw_destroy;
 142    winsys->is_displaytarget_format_supported = null_sw_is_displaytarget_format_supported;
 143    winsys->displaytarget_create = null_sw_displaytarget_create;
 144    winsys->displaytarget_from_handle = null_sw_displaytarget_from_handle;
 145    winsys->displaytarget_get_handle = null_sw_displaytarget_get_handle;
 146    winsys->displaytarget_map = null_sw_displaytarget_map;
 147    winsys->displaytarget_unmap = null_sw_displaytarget_unmap;
 148    winsys->displaytarget_display = null_sw_displaytarget_display;
 149    winsys->displaytarget_destroy = null_sw_displaytarget_destroy;
 150
 151    return winsys;
 152 }