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    /* XXX: The xlib state tracker is brain-dead and will request
 128     * PIPE_FORMAT_Z16_UNORM no matter how much we tell it we don't support it.
 129     */
 130    if (lpt->base.format == PIPE_FORMAT_Z16_UNORM)
 131       lpt->base.format = PIPE_FORMAT_Z32_UNORM;
 132
 133    if (lpt->base.tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 134                               PIPE_TEXTURE_USAGE_PRIMARY)) {
 135       if (!llvmpipe_displaytarget_layout(screen, lpt))
 136          goto fail;
 137    }
 138    else {
 139       if (!llvmpipe_texture_layout(screen, lpt))
 140          goto fail;
 141    }
 142
 143    return &lpt->base;
 144
 145  fail:
 146    FREE(lpt);
 147    return NULL;
 148 }
 149
 150
 151 static struct pipe_texture *
 152 llvmpipe_texture_blanket(struct pipe_screen * screen,
 153                          const struct pipe_texture *base,
 154                          const unsigned *stride,
 155                          struct pipe_buffer *buffer)
 156 {
 157    /* FIXME */
 158 #if 0
 159    struct llvmpipe_texture *lpt;
 160    assert(screen);
 161
 162    /* Only supports one type */
 163    if (base->target != PIPE_TEXTURE_2D ||
 164        base->last_level != 0 ||
 165        base->depth0 != 1) {
 166       return NULL;
 167    }
 168
 169    lpt = CALLOC_STRUCT(llvmpipe_texture);
 170    if (!lpt)
 171       return NULL;
 172
 173    lpt->base = *base;
 174    pipe_reference_init(&lpt->base.reference, 1);
 175    lpt->base.screen = screen;
 176    lpt->stride[0] = stride[0];
 177
 178    pipe_buffer_reference(&lpt->buffer, buffer);
 179
 180    return &lpt->base;
 181 #else
 182    debug_printf("llvmpipe_texture_blanket() not implemented!");
 183    return NULL;
 184 #endif
 185 }
 186
 187
 188 static void
 189 llvmpipe_texture_destroy(struct pipe_texture *pt)
 190 {
 191    struct llvmpipe_screen *screen = llvmpipe_screen(pt->screen);
 192    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 193
 194    if (lpt->dt) {
 195       /* display target */
 196       struct llvmpipe_winsys *winsys = screen->winsys;
 197       winsys->displaytarget_destroy(winsys, lpt->dt);
 198    }
 199    else {
 200       /* regular texture */
 201       align_free(lpt->data);
 202    }
 203
 204    FREE(lpt);
 205 }
 206
 207
 208 static struct pipe_surface *
 209 llvmpipe_get_tex_surface(struct pipe_screen *screen,
 210                          struct pipe_texture *pt,
 211                          unsigned face, unsigned level, unsigned zslice,
 212                          unsigned usage)
 213 {
 214    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 215    struct pipe_surface *ps;
 216
 217    assert(level <= pt->last_level);
 218
 219    ps = CALLOC_STRUCT(pipe_surface);
 220    if (ps) {
 221       pipe_reference_init(&ps->reference, 1);
 222       pipe_texture_reference(&ps->texture, pt);
 223       ps->format = pt->format;
 224       ps->width = u_minify(pt->width0, level);
 225       ps->height = u_minify(pt->height0, level);
 226       ps->offset = lpt->level_offset[level];
 227       ps->usage = usage;
 228
 229       /* Because we are llvmpipe, anything that the state tracker
 230        * thought was going to be done with the GPU will actually get
 231        * done with the CPU.  Let's adjust the flags to take that into
 232        * account.
 233        */
 234       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 235          /* GPU_WRITE means "render" and that can involve reads (blending) */
 236          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 237       }
 238
 239       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 240          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 241
 242       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 243                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 244          /* Mark the surface as dirty. */
 245          lpt->timestamp++;
 246          llvmpipe_screen(screen)->timestamp++;
 247       }
 248
 249       ps->face = face;
 250       ps->level = level;
 251       ps->zslice = zslice;
 252
 253       /* XXX shouldn't that rather be
 254          tex_height = align(ps->height, 2);
 255          to account for alignment done in llvmpipe_texture_layout ?
 256       */
 257       if (pt->target == PIPE_TEXTURE_CUBE) {
 258          unsigned tex_height = ps->height;
 259          ps->offset += face * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 260       }
 261       else if (pt->target == PIPE_TEXTURE_3D) {
 262          unsigned tex_height = ps->height;
 263          ps->offset += zslice * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 264       }
 265       else {
 266          assert(face == 0);
 267          assert(zslice == 0);
 268       }
 269    }
 270    return ps;
 271 }
 272
 273
 274 static void
 275 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 276 {
 277    /* Effectively do the texture_update work here - if texture images
 278     * needed post-processing to put them into hardware layout, this is
 279     * where it would happen.  For llvmpipe, nothing to do.
 280     */
 281    assert(surf->texture);
 282    pipe_texture_reference(&surf->texture, NULL);
 283    FREE(surf);
 284 }
 285
 286
 287 static struct pipe_transfer *
 288 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 289                           struct pipe_texture *texture,
 290                           unsigned face, unsigned level, unsigned zslice,
 291                           enum pipe_transfer_usage usage,
 292                           unsigned x, unsigned y, unsigned w, unsigned h)
 293 {
 294    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 295    struct llvmpipe_transfer *lpt;
 296
 297    assert(texture);
 298    assert(level <= texture->last_level);
 299
 300    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 301    if (lpt) {
 302       struct pipe_transfer *pt = &lpt->base;
 303       pipe_texture_reference(&pt->texture, texture);
 304       pt->x = x;
 305       pt->y = y;
 306       pt->width = align(w, TILE_SIZE);
 307       pt->height = align(h, TILE_SIZE);
 308       pt->stride = lptex->stride[level];
 309       pt->usage = usage;
 310       pt->face = face;
 311       pt->level = level;
 312       pt->zslice = zslice;
 313
 314       lpt->offset = lptex->level_offset[level];
 315
 316       /* XXX shouldn't that rather be
 317          tex_height = align(u_minify(texture->height0, level), 2)
 318          to account for alignment done in llvmpipe_texture_layout ?
 319       */
 320       if (texture->target == PIPE_TEXTURE_CUBE) {
 321          unsigned tex_height = u_minify(texture->height0, level);
 322          lpt->offset += face *  util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 323       }
 324       else if (texture->target == PIPE_TEXTURE_3D) {
 325          unsigned tex_height = u_minify(texture->height0, level);
 326          lpt->offset += zslice * util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 327       }
 328       else {
 329          assert(face == 0);
 330          assert(zslice == 0);
 331       }
 332       return pt;
 333    }
 334    return NULL;
 335 }
 336
 337
 338 static void
 339 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 340 {
 341    /* Effectively do the texture_update work here - if texture images
 342     * needed post-processing to put them into hardware layout, this is
 343     * where it would happen.  For llvmpipe, nothing to do.
 344     */
 345    assert (transfer->texture);
 346    pipe_texture_reference(&transfer->texture, NULL);
 347    FREE(transfer);
 348 }
 349
 350
 351 static void *
 352 llvmpipe_transfer_map( struct pipe_screen *_screen,
 353                        struct pipe_transfer *transfer )
 354 {
 355    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 356    ubyte *map, *xfer_map;
 357    struct llvmpipe_texture *lpt;
 358    enum pipe_format format;
 359
 360    assert(transfer->texture);
 361    lpt = llvmpipe_texture(transfer->texture);
 362    format = lpt->base.format;
 363
 364    if (lpt->dt) {
 365       /* display target */
 366       struct llvmpipe_winsys *winsys = screen->winsys;
 367
 368       map = winsys->displaytarget_map(winsys, lpt->dt,
 369                                       pipe_transfer_buffer_flags(transfer));
 370       if (map == NULL)
 371          return NULL;
 372    }
 373    else {
 374       /* regular texture */
 375       map = lpt->data;
 376    }
 377
 378    /* May want to different things here depending on read/write nature
 379     * of the map:
 380     */
 381    if (transfer->texture && (transfer->usage & PIPE_TRANSFER_WRITE)) {
 382       /* Do something to notify sharing contexts of a texture change.
 383        */
 384       screen->timestamp++;
 385    }
 386
 387    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 388       transfer->y / util_format_get_blockheight(format) * transfer->stride +
 389       transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 390    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 391    return xfer_map;
 392 }
 393
 394
 395 static void
 396 llvmpipe_transfer_unmap(struct pipe_screen *screen,
 397                        struct pipe_transfer *transfer)
 398 {
 399    struct llvmpipe_screen *lp_screen = llvmpipe_screen(screen);
 400    struct llvmpipe_texture *lpt;
 401
 402    assert(transfer->texture);
 403    lpt = llvmpipe_texture(transfer->texture);
 404
 405    if (lpt->dt) {
 406       /* display target */
 407       struct llvmpipe_winsys *winsys = lp_screen->winsys;
 408       winsys->displaytarget_unmap(winsys, lpt->dt);
 409    }
 410 }
 411
 412
 413 void
 414 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 415 {
 416    screen->texture_create = llvmpipe_texture_create;
 417    screen->texture_blanket = llvmpipe_texture_blanket;
 418    screen->texture_destroy = llvmpipe_texture_destroy;
 419
 420    screen->get_tex_surface = llvmpipe_get_tex_surface;
 421    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 422
 423    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 424    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 425    screen->transfer_map = llvmpipe_transfer_map;
 426    screen->transfer_unmap = llvmpipe_transfer_unmap;
 427 }