src/gallium/drivers/softpipe/sp_texture.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   *   Michel Dänzer <michel@tungstengraphics.com>
  31   */
  32
  33 #include "pipe/p_defines.h"
  34 #include "pipe/p_inlines.h"
  35 #include "util/u_math.h"
  36 #include "util/u_memory.h"
  37
  38 #include "sp_context.h"
  39 #include "sp_state.h"
  40 #include "sp_texture.h"
  41 #include "sp_screen.h"
  42 #include "sp_winsys.h"
  43
  44
  45 /**
  46  * Conventional allocation path for non-display textures:
  47  * Use a simple, maximally packed layout.
  48  */
  49 static boolean
  50 softpipe_texture_layout(struct pipe_screen *screen,
  51                         struct softpipe_texture * spt)
  52 {
  53    struct pipe_texture *pt = &spt->base;
  54    unsigned level;
  55    unsigned width = pt->width[0];
  56    unsigned height = pt->height[0];
  57    unsigned depth = pt->depth[0];
  58
  59    unsigned buffer_size = 0;
  60
  61    for (level = 0; level <= pt->last_level; level++) {
  62       pt->width[level] = width;
  63       pt->height[level] = height;
  64       pt->depth[level] = depth;
  65       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  66       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  67       spt->stride[level] = pt->nblocksx[level]*pt->block.size;
  68
  69       spt->level_offset[level] = buffer_size;
  70
  71       buffer_size += (pt->nblocksy[level] *
  72                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  73                       spt->stride[level]);
  74
  75       width  = minify(width);
  76       height = minify(height);
  77       depth = minify(depth);
  78    }
  79
  80    spt->buffer = screen->buffer_create(screen, 32,
  81                                        PIPE_BUFFER_USAGE_PIXEL,
  82                                        buffer_size);
  83
  84    return spt->buffer != NULL;
  85 }
  86
  87
  88 /**
  89  * Texture layout for simple color buffers.
  90  */
  91 static boolean
  92 softpipe_displaytarget_layout(struct pipe_screen *screen,
  93                               struct softpipe_texture * spt)
  94 {
  95    unsigned usage = (PIPE_BUFFER_USAGE_CPU_READ_WRITE |
  96                      PIPE_BUFFER_USAGE_GPU_READ_WRITE);
  97    unsigned tex_usage = spt->base.tex_usage;
  98
  99    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 100    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 101
 102    spt->buffer = screen->surface_buffer_create( screen,
 103                                                 spt->base.width[0],
 104                                                 spt->base.height[0],
 105                                                 spt->base.format,
 106                                                 usage,
 107                                                 tex_usage,
 108                                                 &spt->stride[0]);
 109
 110    return spt->buffer != NULL;
 111 }
 112
 113
 114 static struct pipe_texture *
 115 softpipe_texture_create(struct pipe_screen *screen,
 116                         const struct pipe_texture *templat)
 117 {
 118    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
 119    if (!spt)
 120       return NULL;
 121
 122    spt->base = *templat;
 123    pipe_reference_init(&spt->base.reference, 1);
 124    spt->base.screen = screen;
 125
 126    if (spt->base.tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 127                               PIPE_TEXTURE_USAGE_PRIMARY)) {
 128       if (!softpipe_displaytarget_layout(screen, spt))
 129          goto fail;
 130    }
 131    else {
 132       if (!softpipe_texture_layout(screen, spt))
 133          goto fail;
 134    }
 135
 136    return &spt->base;
 137
 138  fail:
 139    FREE(spt);
 140    return NULL;
 141 }
 142
 143
 144 static struct pipe_texture *
 145 softpipe_texture_blanket(struct pipe_screen * screen,
 146                          const struct pipe_texture *base,
 147                          const unsigned *stride,
 148                          struct pipe_buffer *buffer)
 149 {
 150    struct softpipe_texture *spt;
 151    assert(screen);
 152
 153    /* Only supports one type */
 154    if (base->target != PIPE_TEXTURE_2D ||
 155        base->last_level != 0 ||
 156        base->depth[0] != 1) {
 157       return NULL;
 158    }
 159
 160    spt = CALLOC_STRUCT(softpipe_texture);
 161    if (!spt)
 162       return NULL;
 163
 164    spt->base = *base;
 165    pipe_reference_init(&spt->base.reference, 1);
 166    spt->base.screen = screen;
 167    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 168    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 169    spt->stride[0] = stride[0];
 170
 171    pipe_buffer_reference(&spt->buffer, buffer);
 172
 173    return &spt->base;
 174 }
 175
 176
 177 static void
 178 softpipe_texture_destroy(struct pipe_texture *pt)
 179 {
 180    struct softpipe_texture *spt = softpipe_texture(pt);
 181
 182    pipe_buffer_reference(&spt->buffer, NULL);
 183    FREE(spt);
 184 }
 185
 186
 187 static struct pipe_surface *
 188 softpipe_get_tex_surface(struct pipe_screen *screen,
 189                          struct pipe_texture *pt,
 190                          unsigned face, unsigned level, unsigned zslice,
 191                          unsigned usage)
 192 {
 193    struct softpipe_texture *spt = softpipe_texture(pt);
 194    struct pipe_surface *ps;
 195
 196    assert(level <= pt->last_level);
 197
 198    ps = CALLOC_STRUCT(pipe_surface);
 199    if (ps) {
 200       pipe_reference_init(&ps->reference, 1);
 201       pipe_texture_reference(&ps->texture, pt);
 202       ps->format = pt->format;
 203       ps->width = pt->width[level];
 204       ps->height = pt->height[level];
 205       ps->offset = spt->level_offset[level];
 206       ps->usage = usage;
 207
 208       /* Because we are softpipe, anything that the state tracker
 209        * thought was going to be done with the GPU will actually get
 210        * done with the CPU.  Let's adjust the flags to take that into
 211        * account.
 212        */
 213       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 214          /* GPU_WRITE means "render" and that can involve reads (blending) */
 215          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 216       }
 217
 218       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 219          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 220
 221       ps->face = face;
 222       ps->level = level;
 223       ps->zslice = zslice;
 224
 225       if (pt->target == PIPE_TEXTURE_CUBE) {
 226          ps->offset += face * pt->nblocksy[level] * spt->stride[level];
 227       }
 228       else if (pt->target == PIPE_TEXTURE_3D) {
 229          ps->offset += zslice * pt->nblocksy[level] * spt->stride[level];
 230       }
 231       else {
 232          assert(face == 0);
 233          assert(zslice == 0);
 234       }
 235    }
 236    return ps;
 237 }
 238
 239
 240 static void
 241 softpipe_tex_surface_destroy(struct pipe_surface *surf)
 242 {
 243    /* Effectively do the texture_update work here - if texture images
 244     * needed post-processing to put them into hardware layout, this is
 245     * where it would happen.  For softpipe, nothing to do.
 246     */
 247    assert(surf->texture);
 248    pipe_texture_reference(&surf->texture, NULL);
 249    FREE(surf);
 250 }
 251
 252
 253 static struct pipe_transfer *
 254 softpipe_get_tex_transfer(struct pipe_screen *screen,
 255                           struct pipe_texture *texture,
 256                           unsigned face, unsigned level, unsigned zslice,
 257                           enum pipe_transfer_usage usage,
 258                           unsigned x, unsigned y, unsigned w, unsigned h)
 259 {
 260    struct softpipe_texture *sptex = softpipe_texture(texture);
 261    struct softpipe_transfer *spt;
 262
 263    assert(texture);
 264    assert(level <= texture->last_level);
 265
 266    spt = CALLOC_STRUCT(softpipe_transfer);
 267    if (spt) {
 268       struct pipe_transfer *pt = &spt->base;
 269       pipe_texture_reference(&pt->texture, texture);
 270       pt->format = texture->format;
 271       pt->block = texture->block;
 272       pt->x = x;
 273       pt->y = y;
 274       pt->width = w;
 275       pt->height = h;
 276       pt->nblocksx = texture->nblocksx[level];
 277       pt->nblocksy = texture->nblocksy[level];
 278       pt->stride = sptex->stride[level];
 279       pt->usage = usage;
 280       pt->face = face;
 281       pt->level = level;
 282       pt->zslice = zslice;
 283
 284       spt->offset = sptex->level_offset[level];
 285
 286       if (texture->target == PIPE_TEXTURE_CUBE) {
 287          spt->offset += face * pt->nblocksy * pt->stride;
 288       }
 289       else if (texture->target == PIPE_TEXTURE_3D) {
 290          spt->offset += zslice * pt->nblocksy * pt->stride;
 291       }
 292       else {
 293          assert(face == 0);
 294          assert(zslice == 0);
 295       }
 296       return pt;
 297    }
 298    return NULL;
 299 }
 300
 301
 302 static void
 303 softpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 304 {
 305    /* Effectively do the texture_update work here - if texture images
 306     * needed post-processing to put them into hardware layout, this is
 307     * where it would happen.  For softpipe, nothing to do.
 308     */
 309    assert (transfer->texture);
 310    pipe_texture_reference(&transfer->texture, NULL);
 311    FREE(transfer);
 312 }
 313
 314
 315 static void *
 316 softpipe_transfer_map( struct pipe_screen *screen,
 317                        struct pipe_transfer *transfer )
 318 {
 319    ubyte *map, *xfer_map;
 320    struct softpipe_texture *spt;
 321    unsigned flags = 0;
 322
 323    assert(transfer->texture);
 324    spt = softpipe_texture(transfer->texture);
 325
 326    if (transfer->usage != PIPE_TRANSFER_READ) {
 327       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 328    }
 329
 330    if (transfer->usage != PIPE_TRANSFER_WRITE) {
 331       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 332    }
 333
 334    map = pipe_buffer_map(screen, spt->buffer, flags);
 335    if (map == NULL)
 336       return NULL;
 337
 338    /* May want to different things here depending on read/write nature
 339     * of the map:
 340     */
 341    if (transfer->texture && transfer->usage != PIPE_TRANSFER_READ) {
 342       /* Do something to notify sharing contexts of a texture change.
 343        * In softpipe, that would mean flushing the texture cache.
 344        */
 345       softpipe_screen(screen)->timestamp++;
 346    }
 347
 348    xfer_map = map + softpipe_transfer(transfer)->offset +
 349       transfer->y / transfer->block.height * transfer->stride +
 350       transfer->x / transfer->block.width * transfer->block.size;
 351    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 352    return xfer_map;
 353 }
 354
 355
 356 static void
 357 softpipe_transfer_unmap(struct pipe_screen *screen,
 358                         struct pipe_transfer *transfer)
 359 {
 360    struct softpipe_texture *spt;
 361
 362    assert(transfer->texture);
 363    spt = softpipe_texture(transfer->texture);
 364
 365    pipe_buffer_unmap( screen, spt->buffer );
 366
 367    if (transfer->usage != PIPE_TRANSFER_READ) {
 368       /* Mark the texture as dirty to expire the tile caches. */
 369       spt->modified = TRUE;
 370    }
 371 }
 372
 373
 374 void
 375 softpipe_init_texture_funcs(struct softpipe_context *sp)
 376 {
 377 }
 378
 379
 380 void
 381 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 382 {
 383    screen->texture_create = softpipe_texture_create;
 384    screen->texture_blanket = softpipe_texture_blanket;
 385    screen->texture_destroy = softpipe_texture_destroy;
 386
 387    screen->get_tex_surface = softpipe_get_tex_surface;
 388    screen->tex_surface_destroy = softpipe_tex_surface_destroy;
 389
 390    screen->get_tex_transfer = softpipe_get_tex_transfer;
 391    screen->tex_transfer_destroy = softpipe_tex_transfer_destroy;
 392    screen->transfer_map = softpipe_transfer_map;
 393    screen->transfer_unmap = softpipe_transfer_unmap;
 394 }
 395
 396
 397 boolean
 398 softpipe_get_texture_buffer( struct pipe_texture *texture,
 399                              struct pipe_buffer **buf,
 400                              unsigned *stride )
 401 {
 402    struct softpipe_texture *tex = (struct softpipe_texture *) texture;
 403
 404    if (!tex)
 405       return FALSE;
 406
 407    pipe_buffer_reference(buf, tex->buffer);
 408
 409    if (stride)
 410       *stride = tex->stride[0];
 411
 412    return TRUE;
 413 }