src/gallium/winsys/sw/dri/dri_sw_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, VMware, Inc.
   4  * All Rights Reserved.
   5  * Copyright 2010 George Sapountzis <gsapountzis@gmail.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #include "pipe/p_compiler.h"
  30 #include "pipe/p_format.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_format.h"
  33 #include "util/u_math.h"
  34 #include "util/u_memory.h"
  35
  36 #include "state_tracker/sw_winsys.h"
  37 #include "dri_sw_winsys.h"
  38
  39
  40 struct dri_sw_displaytarget
  41 {
  42    void *data;
  43    void *mapped;
  44 };
  45
  46 struct dri_sw_winsys
  47 {
  48    struct sw_winsys base;
  49 };
  50
  51 static INLINE struct dri_sw_displaytarget *
  52 dri_sw_displaytarget( struct sw_displaytarget *dt )
  53 {
  54    return (struct dri_sw_displaytarget *)dt;
  55 }
  56
  57 static INLINE struct dri_sw_winsys *
  58 dri_sw_winsys( struct sw_winsys *ws )
  59 {
  60    return (struct dri_sw_winsys *)ws;
  61 }
  62
  63
  64 static boolean
  65 dri_sw_is_displaytarget_format_supported( struct sw_winsys *ws,
  66                                           unsigned tex_usage,
  67                                           enum pipe_format format )
  68 {
  69    /* TODO: check visuals or other sensible thing here */
  70    return TRUE;
  71 }
  72
  73 static struct sw_displaytarget *
  74 dri_sw_displaytarget_create(struct sw_winsys *winsys,
  75                             unsigned tex_usage,
  76                             enum pipe_format format,
  77                             unsigned width, unsigned height,
  78                             unsigned alignment,
  79                             unsigned *stride)
  80 {
  81    struct dri_sw_displaytarget *dri_sw_dt;
  82    unsigned nblocksy, size, dri_sw_stride, format_stride;
  83
  84    dri_sw_dt = CALLOC_STRUCT(dri_sw_displaytarget);
  85    if(!dri_sw_dt)
  86       goto no_dt;
  87
  88    format_stride = util_format_get_stride(format, width);
  89    dri_sw_stride = align(format_stride, alignment);
  90
  91    nblocksy = util_format_get_nblocksy(format, height);
  92    size = dri_sw_stride * nblocksy;
  93
  94    dri_sw_dt->data = align_malloc(size, alignment);
  95    if(!dri_sw_dt->data)
  96       goto no_data;
  97
  98    *stride = dri_sw_stride;
  99    return (struct sw_displaytarget *)dri_sw_dt;
 100
 101 no_data:
 102    FREE(dri_sw_dt);
 103 no_dt:
 104    return NULL;
 105 }
 106
 107 static void
 108 dri_sw_displaytarget_destroy(struct sw_winsys *ws,
 109                              struct sw_displaytarget *dt)
 110 {
 111    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 112
 113    if (dri_sw_dt->data) {
 114       FREE(dri_sw_dt->data);
 115    }
 116
 117    FREE(dri_sw_dt);
 118 }
 119
 120 static void *
 121 dri_sw_displaytarget_map(struct sw_winsys *ws,
 122                          struct sw_displaytarget *dt,
 123                          unsigned flags)
 124 {
 125    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 126    dri_sw_dt->mapped = dri_sw_dt->data;
 127    return dri_sw_dt->mapped;
 128 }
 129
 130 static void
 131 dri_sw_displaytarget_unmap(struct sw_winsys *ws,
 132                            struct sw_displaytarget *dt)
 133 {
 134    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 135    dri_sw_dt->mapped = NULL;
 136 }
 137
 138 static struct sw_displaytarget *
 139 dri_sw_displaytarget_from_handle(struct sw_winsys *winsys,
 140                                  const struct pipe_texture *templ,
 141                                  struct winsys_handle *whandle,
 142                                  unsigned *stride)
 143 {
 144    assert(0);
 145    return NULL;
 146 }
 147
 148 static boolean
 149 dri_sw_displaytarget_get_handle(struct sw_winsys *winsys,
 150                                 struct sw_displaytarget *dt,
 151                                 struct winsys_handle *whandle)
 152 {
 153    assert(0);
 154    return FALSE;
 155 }
 156
 157 static void
 158 dri_sw_displaytarget_display(struct sw_winsys *ws,
 159                              struct sw_displaytarget *dt,
 160                              void *context_private)
 161 {
 162    assert(0);
 163 }
 164
 165
 166 static void
 167 dri_destroy_sw_winsys(struct sw_winsys *winsys)
 168 {
 169    FREE(winsys);
 170 }
 171
 172 struct sw_winsys *
 173 dri_create_sw_winsys(void)
 174 {
 175    struct dri_sw_winsys *ws;
 176
 177    ws = CALLOC_STRUCT(dri_sw_winsys);
 178    if (!ws)
 179       return NULL;
 180
 181    ws->base.destroy = dri_destroy_sw_winsys;
 182
 183    ws->base.is_displaytarget_format_supported = dri_sw_is_displaytarget_format_supported;
 184
 185    /* screen texture functions */
 186    ws->base.displaytarget_create = dri_sw_displaytarget_create;
 187    ws->base.displaytarget_destroy = dri_sw_displaytarget_destroy;
 188    ws->base.displaytarget_from_handle = dri_sw_displaytarget_from_handle;
 189    ws->base.displaytarget_get_handle = dri_sw_displaytarget_get_handle;
 190
 191    /* texture functions */
 192    ws->base.displaytarget_map = dri_sw_displaytarget_map;
 193    ws->base.displaytarget_unmap = dri_sw_displaytarget_unmap;
 194
 195    ws->base.displaytarget_display = dri_sw_displaytarget_display;
 196
 197    return &ws->base;
 198 }
 199
 200 /* vim: set sw=3 ts=8 sts=3 expandtab: */