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  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
  17.  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  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 boolean
  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.                              unsigned *stride)
  88. {
  89.    fprintf(stderr, "null_sw_displaytarget_create() returning NULL\n");
  90.    return NULL;
  91. }
  92.  
  93.  
  94. static struct sw_displaytarget *
  95. null_sw_displaytarget_from_handle(struct sw_winsys *winsys,
  96.                                   const struct pipe_resource *templat,
  97.                                   struct winsys_handle *whandle,
  98.                                   unsigned *stride)
  99. {
  100.    return NULL;
  101. }
  102.  
  103.  
  104. static boolean
  105. null_sw_displaytarget_get_handle(struct sw_winsys *winsys,
  106.                                  struct sw_displaytarget *dt,
  107.                                  struct winsys_handle *whandle)
  108. {
  109.    assert(0);
  110.    return FALSE;
  111. }
  112.  
  113.  
  114. static void
  115. null_sw_displaytarget_display(struct sw_winsys *winsys,
  116.                               struct sw_displaytarget *dt,
  117.                               void *context_private,
  118.                               struct pipe_box *box)
  119. {
  120.    assert(0);
  121. }
  122.  
  123.  
  124. static void
  125. null_sw_destroy(struct sw_winsys *winsys)
  126. {
  127.    FREE(winsys);
  128. }
  129.  
  130.  
  131. struct sw_winsys *
  132. null_sw_create(void)
  133. {
  134.    static struct sw_winsys *winsys;
  135.  
  136.    winsys = CALLOC_STRUCT(sw_winsys);
  137.    if (!winsys)
  138.       return NULL;
  139.  
  140.    winsys->destroy = null_sw_destroy;
  141.    winsys->is_displaytarget_format_supported = null_sw_is_displaytarget_format_supported;
  142.    winsys->displaytarget_create = null_sw_displaytarget_create;
  143.    winsys->displaytarget_from_handle = null_sw_displaytarget_from_handle;
  144.    winsys->displaytarget_get_handle = null_sw_displaytarget_get_handle;
  145.    winsys->displaytarget_map = null_sw_displaytarget_map;
  146.    winsys->displaytarget_unmap = null_sw_displaytarget_unmap;
  147.    winsys->displaytarget_display = null_sw_displaytarget_display;
  148.    winsys->displaytarget_destroy = null_sw_displaytarget_destroy;
  149.  
  150.    return winsys;
  151. }
  152.