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 llvmpipe_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_SCANOUT |
 129                               PIPE_TEXTURE_USAGE_SHARED)) {
 130       if (!llvmpipe_displaytarget_layout(screen, lpt))
 131          goto fail;
 132    }
 133    else {
 134       if (!llvmpipe_texture_layout(screen, lpt))
 135          goto fail;
 136    }
 137
 138    return &lpt->base;
 139
 140  fail:
 141    FREE(lpt);
 142    return NULL;
 143 }
 144
 145
 146 static struct pipe_texture *
 147 llvmpipe_texture_blanket(struct pipe_screen * screen,
 148                          const struct pipe_texture *base,
 149                          const unsigned *stride,
 150                          struct pipe_buffer *buffer)
 151 {
 152    /* FIXME */
 153 #if 0
 154    struct llvmpipe_texture *lpt;
 155    assert(screen);
 156
 157    /* Only supports one type */
 158    if (base->target != PIPE_TEXTURE_2D ||
 159        base->last_level != 0 ||
 160        base->depth0 != 1) {
 161       return NULL;
 162    }
 163
 164    lpt = CALLOC_STRUCT(llvmpipe_texture);
 165    if (!lpt)
 166       return NULL;
 167
 168    lpt->base = *base;
 169    pipe_reference_init(&lpt->base.reference, 1);
 170    lpt->base.screen = screen;
 171    lpt->stride[0] = stride[0];
 172
 173    pipe_buffer_reference(&lpt->buffer, buffer);
 174
 175    return &lpt->base;
 176 #else
 177    debug_printf("llvmpipe_texture_blanket() not implemented!");
 178    return NULL;
 179 #endif
 180 }
 181
 182
 183 static void
 184 llvmpipe_texture_destroy(struct pipe_texture *pt)
 185 {
 186    struct llvmpipe_screen *screen = llvmpipe_screen(pt->screen);
 187    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 188
 189    if (lpt->dt) {
 190       /* display target */
 191       struct llvmpipe_winsys *winsys = screen->winsys;
 192       winsys->displaytarget_destroy(winsys, lpt->dt);
 193    }
 194    else {
 195       /* regular texture */
 196       align_free(lpt->data);
 197    }
 198
 199    FREE(lpt);
 200 }
 201
 202
 203 static struct pipe_surface *
 204 llvmpipe_get_tex_surface(struct pipe_screen *screen,
 205                          struct pipe_texture *pt,
 206                          unsigned face, unsigned level, unsigned zslice,
 207                          unsigned usage)
 208 {
 209    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 210    struct pipe_surface *ps;
 211
 212    assert(level <= pt->last_level);
 213
 214    ps = CALLOC_STRUCT(pipe_surface);
 215    if (ps) {
 216       pipe_reference_init(&ps->reference, 1);
 217       pipe_texture_reference(&ps->texture, pt);
 218       ps->format = pt->format;
 219       ps->width = u_minify(pt->width0, level);
 220       ps->height = u_minify(pt->height0, level);
 221       ps->offset = lpt->level_offset[level];
 222       ps->usage = usage;
 223
 224       /* Because we are llvmpipe, anything that the state tracker
 225        * thought was going to be done with the GPU will actually get
 226        * done with the CPU.  Let's adjust the flags to take that into
 227        * account.
 228        */
 229       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 230          /* GPU_WRITE means "render" and that can involve reads (blending) */
 231          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 232       }
 233
 234       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 235          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 236
 237       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 238                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 239          /* Mark the surface as dirty. */
 240          lpt->timestamp++;
 241          llvmpipe_screen(screen)->timestamp++;
 242       }
 243
 244       ps->face = face;
 245       ps->level = level;
 246       ps->zslice = zslice;
 247
 248       /* XXX shouldn't that rather be
 249          tex_height = align(ps->height, 2);
 250          to account for alignment done in llvmpipe_texture_layout ?
 251       */
 252       if (pt->target == PIPE_TEXTURE_CUBE) {
 253          unsigned tex_height = ps->height;
 254          ps->offset += face * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 255       }
 256       else if (pt->target == PIPE_TEXTURE_3D) {
 257          unsigned tex_height = ps->height;
 258          ps->offset += zslice * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 259       }
 260       else {
 261          assert(face == 0);
 262          assert(zslice == 0);
 263       }
 264    }
 265    return ps;
 266 }
 267
 268
 269 static void
 270 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 271 {
 272    /* Effectively do the texture_update work here - if texture images
 273     * needed post-processing to put them into hardware layout, this is
 274     * where it would happen.  For llvmpipe, nothing to do.
 275     */
 276    assert(surf->texture);
 277    pipe_texture_reference(&surf->texture, NULL);
 278    FREE(surf);
 279 }
 280
 281
 282 static struct pipe_transfer *
 283 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 284                           struct pipe_texture *texture,
 285                           unsigned face, unsigned level, unsigned zslice,
 286                           enum pipe_transfer_usage usage,
 287                           unsigned x, unsigned y, unsigned w, unsigned h)
 288 {
 289    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 290    struct llvmpipe_transfer *lpt;
 291
 292    assert(texture);
 293    assert(level <= texture->last_level);
 294
 295    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 296    if (lpt) {
 297       struct pipe_transfer *pt = &lpt->base;
 298       pipe_texture_reference(&pt->texture, texture);
 299       pt->x = x;
 300       pt->y = y;
 301       pt->width = align(w, TILE_SIZE);
 302       pt->height = align(h, TILE_SIZE);
 303       pt->stride = lptex->stride[level];
 304       pt->usage = usage;
 305       pt->face = face;
 306       pt->level = level;
 307       pt->zslice = zslice;
 308
 309       lpt->offset = lptex->level_offset[level];
 310
 311       /* XXX shouldn't that rather be
 312          tex_height = align(u_minify(texture->height0, level), 2)
 313          to account for alignment done in llvmpipe_texture_layout ?
 314       */
 315       if (texture->target == PIPE_TEXTURE_CUBE) {
 316          unsigned tex_height = u_minify(texture->height0, level);
 317          lpt->offset += face *  util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 318       }
 319       else if (texture->target == PIPE_TEXTURE_3D) {
 320          unsigned tex_height = u_minify(texture->height0, level);
 321          lpt->offset += zslice * util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 322       }
 323       else {
 324          assert(face == 0);
 325          assert(zslice == 0);
 326       }
 327       return pt;
 328    }
 329    return NULL;
 330 }
 331
 332
 333 static void
 334 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 335 {
 336    /* Effectively do the texture_update work here - if texture images
 337     * needed post-processing to put them into hardware layout, this is
 338     * where it would happen.  For llvmpipe, nothing to do.
 339     */
 340    assert (transfer->texture);
 341    pipe_texture_reference(&transfer->texture, NULL);
 342    FREE(transfer);
 343 }
 344
 345
 346 static void *
 347 llvmpipe_transfer_map( struct pipe_screen *_screen,
 348                        struct pipe_transfer *transfer )
 349 {
 350    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 351    ubyte *map, *xfer_map;
 352    struct llvmpipe_texture *lpt;
 353    enum pipe_format format;
 354
 355    assert(transfer->texture);
 356    lpt = llvmpipe_texture(transfer->texture);
 357    format = lpt->base.format;
 358
 359    if (lpt->dt) {
 360       /* display target */
 361       struct llvmpipe_winsys *winsys = screen->winsys;
 362
 363       map = winsys->displaytarget_map(winsys, lpt->dt,
 364                                       pipe_transfer_buffer_flags(transfer));
 365       if (map == NULL)
 366          return NULL;
 367    }
 368    else {
 369       /* regular texture */
 370       map = lpt->data;
 371    }
 372
 373    /* May want to different things here depending on read/write nature
 374     * of the map:
 375     */
 376    if (transfer->texture && (transfer->usage & PIPE_TRANSFER_WRITE)) {
 377       /* Do something to notify sharing contexts of a texture change.
 378        */
 379       screen->timestamp++;
 380    }
 381
 382    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 383       transfer->y / util_format_get_blockheight(format) * transfer->stride +
 384       transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 385    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 386    return xfer_map;
 387 }
 388
 389
 390 static void
 391 llvmpipe_transfer_unmap(struct pipe_screen *screen,
 392                        struct pipe_transfer *transfer)
 393 {
 394    struct llvmpipe_screen *lp_screen = llvmpipe_screen(screen);
 395    struct llvmpipe_texture *lpt;
 396
 397    assert(transfer->texture);
 398    lpt = llvmpipe_texture(transfer->texture);
 399
 400    if (lpt->dt) {
 401       /* display target */
 402       struct llvmpipe_winsys *winsys = lp_screen->winsys;
 403       winsys->displaytarget_unmap(winsys, lpt->dt);
 404    }
 405 }
 406
 407
 408 void
 409 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 410 {
 411    screen->texture_create = llvmpipe_texture_create;
 412    screen->texture_blanket = llvmpipe_texture_blanket;
 413    screen->texture_destroy = llvmpipe_texture_destroy;
 414
 415    screen->get_tex_surface = llvmpipe_get_tex_surface;
 416    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 417
 418    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 419    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 420    screen->transfer_map = llvmpipe_transfer_map;
 421    screen->transfer_unmap = llvmpipe_transfer_unmap;
 422 }