src/gallium/drivers/llvmpipe/lp_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 "util/u_inlines.h"
  36
  37 #include "util/u_format.h"
  38 #include "util/u_math.h"
  39 #include "util/u_memory.h"
  40
  41 #include "lp_context.h"
  42 #include "lp_screen.h"
  43 #include "lp_texture.h"
  44 #include "lp_tile_size.h"
  45 #include "lp_winsys.h"
  46
  47
  48 /**
  49  * Conventional allocation path for non-display textures:
  50  * Simple, maximally packed layout.
  51  */
  52 static boolean
  53 llvmpipe_texture_layout(struct llvmpipe_screen *screen,
  54                         struct llvmpipe_texture *lpt)
  55 {
  56    struct pipe_texture *pt = &lpt->base;
  57    unsigned level;
  58    unsigned width = pt->width0;
  59    unsigned height = pt->height0;
  60    unsigned depth = pt->depth0;
  61    unsigned buffer_size = 0;
  62
  63    for (level = 0; level <= pt->last_level; level++) {
  64       unsigned nblocksx, nblocksy;
  65
  66       /* Allocate storage for whole quads. This is particularly important
  67        * for depth surfaces, which are currently stored in a swizzled format.
  68        */
  69       nblocksx = util_format_get_nblocksx(pt->format, align(width, TILE_SIZE));
  70       nblocksy = util_format_get_nblocksy(pt->format, align(height, TILE_SIZE));
  71
  72       lpt->stride[level] = align(nblocksx * util_format_get_blocksize(pt->format), 16);
  73
  74       lpt->level_offset[level] = buffer_size;
  75
  76       buffer_size += (nblocksy *
  77                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  78                       lpt->stride[level]);
  79
  80       width = u_minify(width, 1);
  81       height = u_minify(height, 1);
  82       depth = u_minify(depth, 1);
  83    }
  84
  85    lpt->data = align_malloc(buffer_size, 16);
  86
  87    return lpt->data != NULL;
  88 }
  89
  90
  91
  92 static boolean
  93 llvmpipe_displaytarget_layout(struct llvmpipe_screen *screen,
  94                               struct llvmpipe_texture *lpt)
  95 {
  96    struct sw_winsys *winsys = screen->winsys;
  97
  98    /* Round up the surface size to a multiple of the tile size to
  99     * avoid tile clipping.
 100     */
 101    unsigned width = align(lpt->base.width0, TILE_SIZE);
 102    unsigned height = align(lpt->base.height0, TILE_SIZE);
 103
 104    lpt->dt = winsys->displaytarget_create(winsys,
 105                                           lpt->base.format,
 106                                           width, height,
 107                                           16,
 108                                           &lpt->stride[0] );
 109
 110    return lpt->dt != NULL;
 111 }
 112
 113
 114 static struct pipe_texture *
 115 llvmpipe_texture_create(struct pipe_screen *_screen,
 116                         const struct pipe_texture *templat)
 117 {
 118    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 119    struct llvmpipe_texture *lpt = CALLOC_STRUCT(llvmpipe_texture);
 120    if (!lpt)
 121       return NULL;
 122
 123    lpt->base = *templat;
 124    pipe_reference_init(&lpt->base.reference, 1);
 125    lpt->base.screen = &screen->base;
 126
 127    if (lpt->base.tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 128                               PIPE_TEXTURE_USAGE_PRIMARY)) {
 129       if (!llvmpipe_displaytarget_layout(screen, lpt))
 130          goto fail;
 131    }
 132    else {
 133       if (!llvmpipe_texture_layout(screen, lpt))
 134          goto fail;
 135    }
 136
 137    return &lpt->base;
 138
 139  fail:
 140    FREE(lpt);
 141    return NULL;
 142 }
 143
 144
 145 static struct pipe_texture *
 146 llvmpipe_texture_blanket(struct pipe_screen * screen,
 147                          const struct pipe_texture *base,
 148                          const unsigned *stride,
 149                          struct pipe_buffer *buffer)
 150 {
 151    /* FIXME */
 152 #if 0
 153    struct llvmpipe_texture *lpt;
 154    assert(screen);
 155
 156    /* Only supports one type */
 157    if (base->target != PIPE_TEXTURE_2D ||
 158        base->last_level != 0 ||
 159        base->depth0 != 1) {
 160       return NULL;
 161    }
 162
 163    lpt = CALLOC_STRUCT(llvmpipe_texture);
 164    if (!lpt)
 165       return NULL;
 166
 167    lpt->base = *base;
 168    pipe_reference_init(&lpt->base.reference, 1);
 169    lpt->base.screen = screen;
 170    lpt->stride[0] = stride[0];
 171
 172    pipe_buffer_reference(&lpt->buffer, buffer);
 173
 174    return &lpt->base;
 175 #else
 176    debug_printf("llvmpipe_texture_blanket() not implemented!");
 177    return NULL;
 178 #endif
 179 }
 180
 181
 182 static void
 183 llvmpipe_texture_destroy(struct pipe_texture *pt)
 184 {
 185    struct llvmpipe_screen *screen = llvmpipe_screen(pt->screen);
 186    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 187
 188    if (lpt->dt) {
 189       /* display target */
 190       struct sw_winsys *winsys = screen->winsys;
 191       winsys->displaytarget_destroy(winsys, lpt->dt);
 192    }
 193    else {
 194       /* regular texture */
 195       align_free(lpt->data);
 196    }
 197
 198    FREE(lpt);
 199 }
 200
 201
 202 static struct pipe_surface *
 203 llvmpipe_get_tex_surface(struct pipe_screen *screen,
 204                          struct pipe_texture *pt,
 205                          unsigned face, unsigned level, unsigned zslice,
 206                          unsigned usage)
 207 {
 208    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 209    struct pipe_surface *ps;
 210
 211    assert(level <= pt->last_level);
 212
 213    ps = CALLOC_STRUCT(pipe_surface);
 214    if (ps) {
 215       pipe_reference_init(&ps->reference, 1);
 216       pipe_texture_reference(&ps->texture, pt);
 217       ps->format = pt->format;
 218       ps->width = u_minify(pt->width0, level);
 219       ps->height = u_minify(pt->height0, level);
 220       ps->offset = lpt->level_offset[level];
 221       ps->usage = usage;
 222
 223       /* Because we are llvmpipe, anything that the state tracker
 224        * thought was going to be done with the GPU will actually get
 225        * done with the CPU.  Let's adjust the flags to take that into
 226        * account.
 227        */
 228       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 229          /* GPU_WRITE means "render" and that can involve reads (blending) */
 230          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 231       }
 232
 233       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 234          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 235
 236       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 237                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 238          /* Mark the surface as dirty. */
 239          lpt->timestamp++;
 240          llvmpipe_screen(screen)->timestamp++;
 241       }
 242
 243       ps->face = face;
 244       ps->level = level;
 245       ps->zslice = zslice;
 246
 247       /* XXX shouldn't that rather be
 248          tex_height = align(ps->height, 2);
 249          to account for alignment done in llvmpipe_texture_layout ?
 250       */
 251       if (pt->target == PIPE_TEXTURE_CUBE) {
 252          unsigned tex_height = ps->height;
 253          ps->offset += face * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 254       }
 255       else if (pt->target == PIPE_TEXTURE_3D) {
 256          unsigned tex_height = ps->height;
 257          ps->offset += zslice * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 258       }
 259       else {
 260          assert(face == 0);
 261          assert(zslice == 0);
 262       }
 263    }
 264    return ps;
 265 }
 266
 267
 268 static void
 269 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 270 {
 271    /* Effectively do the texture_update work here - if texture images
 272     * needed post-processing to put them into hardware layout, this is
 273     * where it would happen.  For llvmpipe, nothing to do.
 274     */
 275    assert(surf->texture);
 276    pipe_texture_reference(&surf->texture, NULL);
 277    FREE(surf);
 278 }
 279
 280
 281 static struct pipe_transfer *
 282 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 283                           struct pipe_texture *texture,
 284                           unsigned face, unsigned level, unsigned zslice,
 285                           enum pipe_transfer_usage usage,
 286                           unsigned x, unsigned y, unsigned w, unsigned h)
 287 {
 288    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 289    struct llvmpipe_transfer *lpt;
 290
 291    assert(texture);
 292    assert(level <= texture->last_level);
 293
 294    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 295    if (lpt) {
 296       struct pipe_transfer *pt = &lpt->base;
 297       pipe_texture_reference(&pt->texture, texture);
 298       pt->x = x;
 299       pt->y = y;
 300       pt->width = align(w, TILE_SIZE);
 301       pt->height = align(h, TILE_SIZE);
 302       pt->stride = lptex->stride[level];
 303       pt->usage = usage;
 304       pt->face = face;
 305       pt->level = level;
 306       pt->zslice = zslice;
 307
 308       lpt->offset = lptex->level_offset[level];
 309
 310       /* XXX shouldn't that rather be
 311          tex_height = align(u_minify(texture->height0, level), 2)
 312          to account for alignment done in llvmpipe_texture_layout ?
 313       */
 314       if (texture->target == PIPE_TEXTURE_CUBE) {
 315          unsigned tex_height = u_minify(texture->height0, level);
 316          lpt->offset += face *  util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 317       }
 318       else if (texture->target == PIPE_TEXTURE_3D) {
 319          unsigned tex_height = u_minify(texture->height0, level);
 320          lpt->offset += zslice * util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 321       }
 322       else {
 323          assert(face == 0);
 324          assert(zslice == 0);
 325       }
 326       return pt;
 327    }
 328    return NULL;
 329 }
 330
 331
 332 static void
 333 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 334 {
 335    /* Effectively do the texture_update work here - if texture images
 336     * needed post-processing to put them into hardware layout, this is
 337     * where it would happen.  For llvmpipe, nothing to do.
 338     */
 339    assert (transfer->texture);
 340    pipe_texture_reference(&transfer->texture, NULL);
 341    FREE(transfer);
 342 }
 343
 344
 345 static void *
 346 llvmpipe_transfer_map( struct pipe_screen *_screen,
 347                        struct pipe_transfer *transfer )
 348 {
 349    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 350    ubyte *map, *xfer_map;
 351    struct llvmpipe_texture *lpt;
 352    enum pipe_format format;
 353
 354    assert(transfer->texture);
 355    lpt = llvmpipe_texture(transfer->texture);
 356    format = lpt->base.format;
 357
 358    if (lpt->dt) {
 359       /* display target */
 360       struct sw_winsys *winsys = screen->winsys;
 361
 362       map = winsys->displaytarget_map(winsys, lpt->dt,
 363                                       pipe_transfer_buffer_flags(transfer));
 364       if (map == NULL)
 365          return NULL;
 366    }
 367    else {
 368       /* regular texture */
 369       map = lpt->data;
 370    }
 371
 372    /* May want to different things here depending on read/write nature
 373     * of the map:
 374     */
 375    if (transfer->texture && (transfer->usage & PIPE_TRANSFER_WRITE)) {
 376       /* Do something to notify sharing contexts of a texture change.
 377        */
 378       screen->timestamp++;
 379    }
 380
 381    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 382       transfer->y / util_format_get_blockheight(format) * transfer->stride +
 383       transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 384    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 385    return xfer_map;
 386 }
 387
 388
 389 static void
 390 llvmpipe_transfer_unmap(struct pipe_screen *screen,
 391                        struct pipe_transfer *transfer)
 392 {
 393    struct llvmpipe_screen *lp_screen = llvmpipe_screen(screen);
 394    struct llvmpipe_texture *lpt;
 395
 396    assert(transfer->texture);
 397    lpt = llvmpipe_texture(transfer->texture);
 398
 399    if (lpt->dt) {
 400       /* display target */
 401       struct sw_winsys *winsys = lp_screen->winsys;
 402       winsys->displaytarget_unmap(winsys, lpt->dt);
 403    }
 404 }
 405
 406
 407 void
 408 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 409 {
 410    screen->texture_create = llvmpipe_texture_create;
 411    screen->texture_blanket = llvmpipe_texture_blanket;
 412    screen->texture_destroy = llvmpipe_texture_destroy;
 413
 414    screen->get_tex_surface = llvmpipe_get_tex_surface;
 415    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 416
 417    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 418    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 419    screen->transfer_map = llvmpipe_transfer_map;
 420    screen->transfer_unmap = llvmpipe_transfer_unmap;
 421 }