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_context.h"
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_inlines.h"
  36 #include "pipe/internal/p_winsys_screen.h"
  37 #include "util/u_math.h"
  38 #include "util/u_memory.h"
  39
  40 #include "sp_context.h"
  41 #include "sp_state.h"
  42 #include "sp_texture.h"
  43 #include "sp_tile_cache.h"
  44 #include "sp_screen.h"
  45 #include "sp_winsys.h"
  46
  47
  48 /* Simple, maximally packed layout.
  49  */
  50
  51
  52 /* Conventional allocation path for non-display textures:
  53  */
  54 static boolean
  55 softpipe_texture_layout(struct pipe_screen *screen,
  56                         struct softpipe_texture * spt)
  57 {
  58    struct pipe_texture *pt = &spt->base;
  59    unsigned level;
  60    unsigned width = pt->width[0];
  61    unsigned height = pt->height[0];
  62    unsigned depth = pt->depth[0];
  63
  64    unsigned buffer_size = 0;
  65
  66    for (level = 0; level <= pt->last_level; level++) {
  67       pt->width[level] = width;
  68       pt->height[level] = height;
  69       pt->depth[level] = depth;
  70       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  71       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  72       spt->stride[level] = pt->nblocksx[level]*pt->block.size;
  73
  74       spt->level_offset[level] = buffer_size;
  75
  76       buffer_size += (pt->nblocksy[level] *
  77                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  78                       spt->stride[level]);
  79
  80       width  = minify(width);
  81       height = minify(height);
  82       depth = minify(depth);
  83    }
  84
  85    spt->buffer = screen->buffer_create(screen, 32,
  86                                        PIPE_BUFFER_USAGE_PIXEL,
  87                                        buffer_size);
  88
  89    return spt->buffer != NULL;
  90 }
  91
  92 static boolean
  93 softpipe_displaytarget_layout(struct pipe_screen *screen,
  94                               struct softpipe_texture * spt)
  95 {
  96    unsigned usage = (PIPE_BUFFER_USAGE_CPU_READ_WRITE |
  97                      PIPE_BUFFER_USAGE_GPU_READ_WRITE);
  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                                                 &spt->stride[0]);
 108
 109    return spt->buffer != NULL;
 110 }
 111
 112
 113
 114
 115
 116 static struct pipe_texture *
 117 softpipe_texture_create(struct pipe_screen *screen,
 118                         const struct pipe_texture *templat)
 119 {
 120    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
 121    if (!spt)
 122       return NULL;
 123
 124    spt->base = *templat;
 125    pipe_reference_init(&spt->base.reference, 1);
 126    spt->base.screen = screen;
 127
 128    if (spt->base.tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 129                               PIPE_TEXTURE_USAGE_PRIMARY)) {
 130       if (!softpipe_displaytarget_layout(screen, spt))
 131          goto fail;
 132    }
 133    else {
 134       if (!softpipe_texture_layout(screen, spt))
 135          goto fail;
 136    }
 137
 138    return &spt->base;
 139
 140  fail:
 141    FREE(spt);
 142    return NULL;
 143 }
 144
 145
 146 static struct pipe_texture *
 147 softpipe_texture_blanket(struct pipe_screen * screen,
 148                          const struct pipe_texture *base,
 149                          const unsigned *stride,
 150                          struct pipe_buffer *buffer)
 151 {
 152    struct softpipe_texture *spt;
 153    assert(screen);
 154
 155    /* Only supports one type */
 156    if (base->target != PIPE_TEXTURE_2D ||
 157        base->last_level != 0 ||
 158        base->depth[0] != 1) {
 159       return NULL;
 160    }
 161
 162    spt = CALLOC_STRUCT(softpipe_texture);
 163    if (!spt)
 164       return NULL;
 165
 166    spt->base = *base;
 167    pipe_reference_init(&spt->base.reference, 1);
 168    spt->base.screen = screen;
 169    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 170    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 171    spt->stride[0] = stride[0];
 172
 173    pipe_buffer_reference(&spt->buffer, buffer);
 174
 175    return &spt->base;
 176 }
 177
 178
 179 static void
 180 softpipe_texture_destroy(struct pipe_texture *pt)
 181 {
 182    struct softpipe_texture *spt = softpipe_texture(pt);
 183
 184    pipe_buffer_reference(&spt->buffer, NULL);
 185    FREE(spt);
 186 }
 187
 188
 189 static struct pipe_surface *
 190 softpipe_get_tex_surface(struct pipe_screen *screen,
 191                          struct pipe_texture *pt,
 192                          unsigned face, unsigned level, unsigned zslice,
 193                          unsigned usage)
 194 {
 195    struct softpipe_texture *spt = softpipe_texture(pt);
 196    struct pipe_surface *ps;
 197
 198    assert(level <= pt->last_level);
 199
 200    ps = CALLOC_STRUCT(pipe_surface);
 201    if (ps) {
 202       pipe_reference_init(&ps->reference, 1);
 203       pipe_texture_reference(&ps->texture, pt);
 204       ps->format = pt->format;
 205       ps->width = pt->width[level];
 206       ps->height = pt->height[level];
 207       ps->offset = spt->level_offset[level];
 208       ps->usage = usage;
 209
 210       /* Because we are softpipe, anything that the state tracker
 211        * thought was going to be done with the GPU will actually get
 212        * done with the CPU.  Let's adjust the flags to take that into
 213        * account.
 214        */
 215       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 216          /* GPU_WRITE means "render" and that can involve reads (blending) */
 217          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 218       }
 219
 220       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 221          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 222
 223       ps->face = face;
 224       ps->level = level;
 225       ps->zslice = zslice;
 226
 227       if (pt->target == PIPE_TEXTURE_CUBE) {
 228          ps->offset += face * pt->nblocksy[level] * spt->stride[level];
 229       }
 230       else if (pt->target == PIPE_TEXTURE_3D) {
 231          ps->offset += zslice * pt->nblocksy[level] * spt->stride[level];
 232       }
 233       else {
 234          assert(face == 0);
 235          assert(zslice == 0);
 236       }
 237    }
 238    return ps;
 239 }
 240
 241
 242 static void
 243 softpipe_tex_surface_destroy(struct pipe_surface *surf)
 244 {
 245    /* Effectively do the texture_update work here - if texture images
 246     * needed post-processing to put them into hardware layout, this is
 247     * where it would happen.  For softpipe, nothing to do.
 248     */
 249    assert(surf->texture);
 250    pipe_texture_reference(&surf->texture, NULL);
 251    FREE(surf);
 252 }
 253
 254
 255 static struct pipe_transfer *
 256 softpipe_get_tex_transfer(struct pipe_screen *screen,
 257                           struct pipe_texture *texture,
 258                           unsigned face, unsigned level, unsigned zslice,
 259                           enum pipe_transfer_usage usage,
 260                           unsigned x, unsigned y, unsigned w, unsigned h)
 261 {
 262    struct softpipe_texture *sptex = softpipe_texture(texture);
 263    struct softpipe_transfer *spt;
 264
 265    assert(texture);
 266    assert(level <= texture->last_level);
 267
 268    spt = CALLOC_STRUCT(softpipe_transfer);
 269    if (spt) {
 270       struct pipe_transfer *pt = &spt->base;
 271       pipe_texture_reference(&pt->texture, texture);
 272       pt->format = texture->format;
 273       pt->block = texture->block;
 274       pt->x = x;
 275       pt->y = y;
 276       pt->width = w;
 277       pt->height = h;
 278       pt->nblocksx = texture->nblocksx[level];
 279       pt->nblocksy = texture->nblocksy[level];
 280       pt->stride = sptex->stride[level];
 281       pt->usage = usage;
 282       pt->face = face;
 283       pt->level = level;
 284       pt->zslice = zslice;
 285
 286       spt->offset = sptex->level_offset[level];
 287
 288       if (texture->target == PIPE_TEXTURE_CUBE) {
 289          spt->offset += face * pt->nblocksy * pt->stride;
 290       }
 291       else if (texture->target == PIPE_TEXTURE_3D) {
 292          spt->offset += zslice * pt->nblocksy * pt->stride;
 293       }
 294       else {
 295          assert(face == 0);
 296          assert(zslice == 0);
 297       }
 298       return pt;
 299    }
 300    return NULL;
 301 }
 302
 303
 304 static void
 305 softpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 306 {
 307    /* Effectively do the texture_update work here - if texture images
 308     * needed post-processing to put them into hardware layout, this is
 309     * where it would happen.  For softpipe, nothing to do.
 310     */
 311    assert (transfer->texture);
 312    pipe_texture_reference(&transfer->texture, NULL);
 313    FREE(transfer);
 314 }
 315
 316
 317 static void *
 318 softpipe_transfer_map( struct pipe_screen *screen,
 319                        struct pipe_transfer *transfer )
 320 {
 321    ubyte *map, *xfer_map;
 322    struct softpipe_texture *spt;
 323    unsigned flags = 0;
 324
 325    assert(transfer->texture);
 326    spt = softpipe_texture(transfer->texture);
 327
 328    if (transfer->usage != PIPE_TRANSFER_READ) {
 329       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 330    }
 331
 332    if (transfer->usage != PIPE_TRANSFER_WRITE) {
 333       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 334    }
 335
 336    map = pipe_buffer_map(screen, spt->buffer, flags);
 337    if (map == NULL)
 338       return NULL;
 339
 340    /* May want to different things here depending on read/write nature
 341     * of the map:
 342     */
 343    if (transfer->texture && transfer->usage != PIPE_TRANSFER_READ)
 344    {
 345       /* Do something to notify sharing contexts of a texture change.
 346        * In softpipe, that would mean flushing the texture cache.
 347        */
 348       softpipe_screen(screen)->timestamp++;
 349    }
 350
 351    xfer_map = map + softpipe_transfer(transfer)->offset +
 352       transfer->y / transfer->block.height * transfer->stride +
 353       transfer->x / transfer->block.width * transfer->block.size;
 354    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 355    return xfer_map;
 356 }
 357
 358
 359 static void
 360 softpipe_transfer_unmap(struct pipe_screen *screen,
 361                        struct pipe_transfer *transfer)
 362 {
 363    struct softpipe_texture *spt;
 364
 365    assert(transfer->texture);
 366    spt = softpipe_texture(transfer->texture);
 367
 368    pipe_buffer_unmap( screen, spt->buffer );
 369
 370    if (transfer->usage != PIPE_TRANSFER_READ) {
 371       /* Mark the texture as dirty to expire the tile caches. */
 372       spt->modified = TRUE;
 373    }
 374 }
 375
 376
 377 void
 378 softpipe_init_texture_funcs(struct softpipe_context *sp)
 379 {
 380 }
 381
 382
 383 void
 384 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 385 {
 386    screen->texture_create = softpipe_texture_create;
 387    screen->texture_blanket = softpipe_texture_blanket;
 388    screen->texture_destroy = softpipe_texture_destroy;
 389
 390    screen->get_tex_surface = softpipe_get_tex_surface;
 391    screen->tex_surface_destroy = softpipe_tex_surface_destroy;
 392
 393    screen->get_tex_transfer = softpipe_get_tex_transfer;
 394    screen->tex_transfer_destroy = softpipe_tex_transfer_destroy;
 395    screen->transfer_map = softpipe_transfer_map;
 396    screen->transfer_unmap = softpipe_transfer_unmap;
 397 }
 398
 399
 400 boolean
 401 softpipe_get_texture_buffer( struct pipe_texture *texture,
 402                              struct pipe_buffer **buf,
 403                              unsigned *stride )
 404 {
 405    struct softpipe_texture *tex = (struct softpipe_texture *)texture;
 406
 407    if (!tex)
 408       return FALSE;
 409
 410    pipe_buffer_reference(buf, tex->buffer);
 411
 412    if (stride)
 413       *stride = tex->stride[0];
 414
 415    return TRUE;
 416 }