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