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 #ifdef HAVE_SYS_SHM_H
  30 #include <sys/ipc.h>
  31 #include <sys/shm.h>
  32 #ifdef __FreeBSD__
  33 /* sys/ipc.h -> sys/_types.h -> machine/param.h
  34  * - defines ALIGN which clashes with our ALIGN
  35  */
  36 #undef ALIGN
  37 #endif
  38 #endif
  39
  40 #include "pipe/p_compiler.h"
  41 #include "pipe/p_format.h"
  42 #include "pipe/p_state.h"
  43 #include "util/u_inlines.h"
  44 #include "util/format/u_format.h"
  45 #include "util/u_math.h"
  46 #include "util/u_memory.h"
  47
  48 #include "frontend/sw_winsys.h"
  49 #include "dri_sw_winsys.h"
  50
  51
  52 struct dri_sw_displaytarget
  53 {
  54    enum pipe_format format;
  55    unsigned width;
  56    unsigned height;
  57    unsigned stride;
  58
  59    unsigned map_flags;
  60    int shmid;
  61    void *data;
  62    void *mapped;
  63    const void *front_private;
  64 };
  65
  66 struct dri_sw_winsys
  67 {
  68    struct sw_winsys base;
  69
  70    const struct drisw_loader_funcs *lf;
  71 };
  72
  73 static inline struct dri_sw_displaytarget *
  74 dri_sw_displaytarget( struct sw_displaytarget *dt )
  75 {
  76    return (struct dri_sw_displaytarget *)dt;
  77 }
  78
  79 static inline struct dri_sw_winsys *
  80 dri_sw_winsys( struct sw_winsys *ws )
  81 {
  82    return (struct dri_sw_winsys *)ws;
  83 }
  84
  85
  86 static bool
  87 dri_sw_is_displaytarget_format_supported( struct sw_winsys *ws,
  88                                           unsigned tex_usage,
  89                                           enum pipe_format format )
  90 {
  91    /* TODO: check visuals or other sensible thing here */
  92    return true;
  93 }
  94
  95 #ifdef HAVE_SYS_SHM_H
  96 static char *
  97 alloc_shm(struct dri_sw_displaytarget *dri_sw_dt, unsigned size)
  98 {
  99    char *addr;
 100
 101    /* 0600 = user read+write */
 102    dri_sw_dt->shmid = shmget(IPC_PRIVATE, size, IPC_CREAT | 0600);
 103    if (dri_sw_dt->shmid < 0)
 104       return NULL;
 105
 106    addr = (char *) shmat(dri_sw_dt->shmid, 0, 0);
 107    /* mark the segment immediately for deletion to avoid leaks */
 108    shmctl(dri_sw_dt->shmid, IPC_RMID, 0);
 109
 110    if (addr == (char *) -1)
 111       return NULL;
 112
 113    return addr;
 114 }
 115 #endif
 116
 117 static struct sw_displaytarget *
 118 dri_sw_displaytarget_create(struct sw_winsys *winsys,
 119                             unsigned tex_usage,
 120                             enum pipe_format format,
 121                             unsigned width, unsigned height,
 122                             unsigned alignment,
 123                             const void *front_private,
 124                             unsigned *stride)
 125 {
 126    struct dri_sw_winsys *ws = dri_sw_winsys(winsys);
 127    struct dri_sw_displaytarget *dri_sw_dt;
 128    unsigned nblocksy, size, format_stride;
 129
 130    dri_sw_dt = CALLOC_STRUCT(dri_sw_displaytarget);
 131    if(!dri_sw_dt)
 132       goto no_dt;
 133
 134    dri_sw_dt->format = format;
 135    dri_sw_dt->width = width;
 136    dri_sw_dt->height = height;
 137    dri_sw_dt->front_private = front_private;
 138
 139    format_stride = util_format_get_stride(format, width);
 140    dri_sw_dt->stride = align(format_stride, alignment);
 141
 142    nblocksy = util_format_get_nblocksy(format, height);
 143    size = dri_sw_dt->stride * nblocksy;
 144
 145    dri_sw_dt->shmid = -1;
 146
 147 #ifdef HAVE_SYS_SHM_H
 148    if (ws->lf->put_image_shm)
 149       dri_sw_dt->data = alloc_shm(dri_sw_dt, size);
 150 #endif
 151
 152    if(!dri_sw_dt->data)
 153       dri_sw_dt->data = align_malloc(size, alignment);
 154
 155    if(!dri_sw_dt->data)
 156       goto no_data;
 157
 158    *stride = dri_sw_dt->stride;
 159    return (struct sw_displaytarget *)dri_sw_dt;
 160
 161 no_data:
 162    FREE(dri_sw_dt);
 163 no_dt:
 164    return NULL;
 165 }
 166
 167 static void
 168 dri_sw_displaytarget_destroy(struct sw_winsys *ws,
 169                              struct sw_displaytarget *dt)
 170 {
 171    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 172
 173    if (dri_sw_dt->shmid >= 0) {
 174 #ifdef HAVE_SYS_SHM_H
 175       shmdt(dri_sw_dt->data);
 176       shmctl(dri_sw_dt->shmid, IPC_RMID, 0);
 177 #endif
 178    } else {
 179       align_free(dri_sw_dt->data);
 180    }
 181
 182    FREE(dri_sw_dt);
 183 }
 184
 185 static void *
 186 dri_sw_displaytarget_map(struct sw_winsys *ws,
 187                          struct sw_displaytarget *dt,
 188                          unsigned flags)
 189 {
 190    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 191    dri_sw_dt->mapped = dri_sw_dt->data;
 192
 193    if (dri_sw_dt->front_private && (flags & PIPE_TRANSFER_READ)) {
 194       struct dri_sw_winsys *dri_sw_ws = dri_sw_winsys(ws);
 195       dri_sw_ws->lf->get_image((void *)dri_sw_dt->front_private, 0, 0, dri_sw_dt->width, dri_sw_dt->height, dri_sw_dt->stride, dri_sw_dt->data);
 196    }
 197    dri_sw_dt->map_flags = flags;
 198    return dri_sw_dt->mapped;
 199 }
 200
 201 static void
 202 dri_sw_displaytarget_unmap(struct sw_winsys *ws,
 203                            struct sw_displaytarget *dt)
 204 {
 205    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 206    if (dri_sw_dt->front_private && (dri_sw_dt->map_flags & PIPE_TRANSFER_WRITE)) {
 207       struct dri_sw_winsys *dri_sw_ws = dri_sw_winsys(ws);
 208       dri_sw_ws->lf->put_image2((void *)dri_sw_dt->front_private, dri_sw_dt->data, 0, 0, dri_sw_dt->width, dri_sw_dt->height, dri_sw_dt->stride);
 209    }
 210    dri_sw_dt->map_flags = 0;
 211    dri_sw_dt->mapped = NULL;
 212 }
 213
 214 static struct sw_displaytarget *
 215 dri_sw_displaytarget_from_handle(struct sw_winsys *winsys,
 216                                  const struct pipe_resource *templ,
 217                                  struct winsys_handle *whandle,
 218                                  unsigned *stride)
 219 {
 220    assert(0);
 221    return NULL;
 222 }
 223
 224 static bool
 225 dri_sw_displaytarget_get_handle(struct sw_winsys *winsys,
 226                                 struct sw_displaytarget *dt,
 227                                 struct winsys_handle *whandle)
 228 {
 229    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 230
 231    if (whandle->type == WINSYS_HANDLE_TYPE_SHMID) {
 232       if (dri_sw_dt->shmid < 0)
 233          return false;
 234       whandle->handle = dri_sw_dt->shmid;
 235       return true;
 236    }
 237
 238    return false;
 239 }
 240
 241 static void
 242 dri_sw_displaytarget_display(struct sw_winsys *ws,
 243                              struct sw_displaytarget *dt,
 244                              void *context_private,
 245                              struct pipe_box *box)
 246 {
 247    struct dri_sw_winsys *dri_sw_ws = dri_sw_winsys(ws);
 248    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 249    struct dri_drawable *dri_drawable = (struct dri_drawable *)context_private;
 250    unsigned width, height, x = 0, y = 0;
 251    unsigned blsize = util_format_get_blocksize(dri_sw_dt->format);
 252    unsigned offset = 0;
 253    unsigned offset_x = 0;
 254    char *data = dri_sw_dt->data;
 255    bool is_shm = dri_sw_dt->shmid != -1;
 256    /* Set the width to 'stride / cpp'.
 257     *
 258     * PutImage correctly clips to the width of the dst drawable.
 259     */
 260    if (box) {
 261       offset = dri_sw_dt->stride * box->y;
 262       offset_x = box->x * blsize;
 263       data += offset;
 264       /* don't add x offset for shm, the put_image_shm will deal with it */
 265       if (!is_shm)
 266          data += offset_x;
 267       x = box->x;
 268       y = box->y;
 269       width = box->width;
 270       height = box->height;
 271    } else {
 272       width = dri_sw_dt->stride / blsize;
 273       height = dri_sw_dt->height;
 274    }
 275
 276    if (is_shm) {
 277       dri_sw_ws->lf->put_image_shm(dri_drawable, dri_sw_dt->shmid, dri_sw_dt->data, offset, offset_x,
 278                                    x, y, width, height, dri_sw_dt->stride);
 279       return;
 280    }
 281
 282    if (box)
 283       dri_sw_ws->lf->put_image2(dri_drawable, data,
 284                                 x, y, width, height, dri_sw_dt->stride);
 285    else
 286       dri_sw_ws->lf->put_image(dri_drawable, data, width, height);
 287 }
 288
 289 static void
 290 dri_destroy_sw_winsys(struct sw_winsys *winsys)
 291 {
 292    FREE(winsys);
 293 }
 294
 295 struct sw_winsys *
 296 dri_create_sw_winsys(const struct drisw_loader_funcs *lf)
 297 {
 298    struct dri_sw_winsys *ws;
 299
 300    ws = CALLOC_STRUCT(dri_sw_winsys);
 301    if (!ws)
 302       return NULL;
 303
 304    ws->lf = lf;
 305    ws->base.destroy = dri_destroy_sw_winsys;
 306
 307    ws->base.is_displaytarget_format_supported = dri_sw_is_displaytarget_format_supported;
 308
 309    /* screen texture functions */
 310    ws->base.displaytarget_create = dri_sw_displaytarget_create;
 311    ws->base.displaytarget_destroy = dri_sw_displaytarget_destroy;
 312    ws->base.displaytarget_from_handle = dri_sw_displaytarget_from_handle;
 313    ws->base.displaytarget_get_handle = dri_sw_displaytarget_get_handle;
 314
 315    /* texture functions */
 316    ws->base.displaytarget_map = dri_sw_displaytarget_map;
 317    ws->base.displaytarget_unmap = dri_sw_displaytarget_unmap;
 318
 319    ws->base.displaytarget_display = dri_sw_displaytarget_display;
 320
 321    return &ws->base;
 322 }
 323
 324 /* vim: set sw=3 ts=8 sts=3 expandtab: */