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
  46
  47 /* Simple, maximally packed layout.
  48  */
  49
  50 static unsigned minify( unsigned d )
  51 {
  52    return MAX2(1, d>>1);
  53 }
  54
  55
  56 /* Conventional allocation path for non-display textures:
  57  */
  58 static boolean
  59 softpipe_texture_layout(struct pipe_screen *screen,
  60                         struct softpipe_texture * spt)
  61 {
  62    struct pipe_texture *pt = &spt->base;
  63    unsigned level;
  64    unsigned width = pt->width[0];
  65    unsigned height = pt->height[0];
  66    unsigned depth = pt->depth[0];
  67
  68    unsigned buffer_size = 0;
  69
  70    for (level = 0; level <= pt->last_level; level++) {
  71       pt->width[level] = width;
  72       pt->height[level] = height;
  73       pt->depth[level] = depth;
  74       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  75       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  76       spt->stride[level] = pt->nblocksx[level]*pt->block.size;
  77
  78       spt->level_offset[level] = buffer_size;
  79
  80       buffer_size += (pt->nblocksy[level] *
  81                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  82                       spt->stride[level]);
  83
  84       width  = minify(width);
  85       height = minify(height);
  86       depth = minify(depth);
  87    }
  88
  89    spt->buffer = screen->buffer_create(screen, 32,
  90                                        PIPE_BUFFER_USAGE_PIXEL,
  91                                        buffer_size);
  92
  93    return spt->buffer != NULL;
  94 }
  95
  96 static boolean
  97 softpipe_displaytarget_layout(struct pipe_screen *screen,
  98                               struct softpipe_texture * spt)
  99 {
 100    unsigned usage = (PIPE_BUFFER_USAGE_CPU_READ_WRITE |
 101                      PIPE_BUFFER_USAGE_GPU_READ_WRITE);
 102
 103    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 104    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 105
 106    spt->buffer = screen->surface_buffer_create( screen,
 107                                                 spt->base.width[0],
 108                                                 spt->base.height[0],
 109                                                 spt->base.format,
 110                                                 usage,
 111                                                 &spt->stride[0]);
 112
 113    return spt->buffer != NULL;
 114 }
 115
 116
 117
 118
 119
 120 static struct pipe_texture *
 121 softpipe_texture_create(struct pipe_screen *screen,
 122                         const struct pipe_texture *templat)
 123 {
 124    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
 125    if (!spt)
 126       return NULL;
 127
 128    spt->base = *templat;
 129    pipe_reference_init(&spt->base.reference, 1);
 130    spt->base.screen = screen;
 131
 132    if (spt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 133       if (!softpipe_displaytarget_layout(screen, spt))
 134          goto fail;
 135    }
 136    else {
 137       if (!softpipe_texture_layout(screen, spt))
 138          goto fail;
 139    }
 140
 141    return &spt->base;
 142
 143  fail:
 144    FREE(spt);
 145    return NULL;
 146 }
 147
 148
 149 static struct pipe_texture *
 150 softpipe_texture_blanket(struct pipe_screen * screen,
 151                          const struct pipe_texture *base,
 152                          const unsigned *stride,
 153                          struct pipe_buffer *buffer)
 154 {
 155    struct softpipe_texture *spt;
 156    assert(screen);
 157
 158    /* Only supports one type */
 159    if (base->target != PIPE_TEXTURE_2D ||
 160        base->last_level != 0 ||
 161        base->depth[0] != 1) {
 162       return NULL;
 163    }
 164
 165    spt = CALLOC_STRUCT(softpipe_texture);
 166    if (!spt)
 167       return NULL;
 168
 169    spt->base = *base;
 170    pipe_reference_init(&spt->base.reference, 1);
 171    spt->base.screen = screen;
 172    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 173    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 174    spt->stride[0] = stride[0];
 175
 176    pipe_buffer_reference(&spt->buffer, buffer);
 177
 178    return &spt->base;
 179 }
 180
 181
 182 static void
 183 softpipe_texture_destroy(struct pipe_texture *pt)
 184 {
 185    struct softpipe_texture *spt = softpipe_texture(pt);
 186
 187    pipe_buffer_reference(&spt->buffer, NULL);
 188    FREE(spt);
 189 }
 190
 191
 192 static struct pipe_surface *
 193 softpipe_get_tex_surface(struct pipe_screen *screen,
 194                          struct pipe_texture *pt,
 195                          unsigned face, unsigned level, unsigned zslice,
 196                          unsigned usage)
 197 {
 198    struct softpipe_texture *spt = softpipe_texture(pt);
 199    struct pipe_surface *ps;
 200
 201    assert(level <= pt->last_level);
 202
 203    ps = CALLOC_STRUCT(pipe_surface);
 204    if (ps) {
 205       pipe_reference_init(&ps->reference, 1);
 206       pipe_texture_reference(&ps->texture, pt);
 207       ps->format = pt->format;
 208       ps->width = pt->width[level];
 209       ps->height = pt->height[level];
 210       ps->offset = spt->level_offset[level];
 211       ps->usage = usage;
 212
 213       /* Because we are softpipe, anything that the state tracker
 214        * thought was going to be done with the GPU will actually get
 215        * done with the CPU.  Let's adjust the flags to take that into
 216        * account.
 217        */
 218       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 219          /* GPU_WRITE means "render" and that can involve reads (blending) */
 220          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 221       }
 222
 223       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 224          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 225
 226       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 227                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 228          /* Mark the surface as dirty.  The tile cache will look for this. */
 229          spt->modified = TRUE;
 230       }
 231
 232       ps->face = face;
 233       ps->level = level;
 234       ps->zslice = zslice;
 235
 236       if (pt->target == PIPE_TEXTURE_CUBE) {
 237          ps->offset += face * pt->nblocksy[level] * spt->stride[level];
 238       }
 239       else if (pt->target == PIPE_TEXTURE_3D) {
 240          ps->offset += zslice * pt->nblocksy[level] * spt->stride[level];
 241       }
 242       else {
 243          assert(face == 0);
 244          assert(zslice == 0);
 245       }
 246    }
 247    return ps;
 248 }
 249
 250
 251 static void
 252 softpipe_tex_surface_destroy(struct pipe_surface *surf)
 253 {
 254    /* Effectively do the texture_update work here - if texture images
 255     * needed post-processing to put them into hardware layout, this is
 256     * where it would happen.  For softpipe, nothing to do.
 257     */
 258    assert(surf->texture);
 259    pipe_texture_reference(&surf->texture, NULL);
 260    FREE(surf);
 261 }
 262
 263
 264 static struct pipe_transfer *
 265 softpipe_get_tex_transfer(struct pipe_screen *screen,
 266                           struct pipe_texture *texture,
 267                           unsigned face, unsigned level, unsigned zslice,
 268                           enum pipe_transfer_usage usage,
 269                           unsigned x, unsigned y, unsigned w, unsigned h)
 270 {
 271    struct softpipe_texture *sptex = softpipe_texture(texture);
 272    struct softpipe_transfer *spt;
 273
 274    assert(texture);
 275    assert(level <= texture->last_level);
 276
 277    spt = CALLOC_STRUCT(softpipe_transfer);
 278    if (spt) {
 279       struct pipe_transfer *pt = &spt->base;
 280       pipe_texture_reference(&pt->texture, texture);
 281       pt->format = texture->format;
 282       pt->block = texture->block;
 283       pt->x = x;
 284       pt->y = y;
 285       pt->width = w;
 286       pt->height = h;
 287       pt->nblocksx = texture->nblocksx[level];
 288       pt->nblocksy = texture->nblocksy[level];
 289       pt->stride = sptex->stride[level];
 290       pt->usage = usage;
 291       pt->face = face;
 292       pt->level = level;
 293       pt->zslice = zslice;
 294
 295       spt->offset = sptex->level_offset[level];
 296
 297       if (texture->target == PIPE_TEXTURE_CUBE) {
 298          spt->offset += face * pt->nblocksy * pt->stride;
 299       }
 300       else if (texture->target == PIPE_TEXTURE_3D) {
 301          spt->offset += zslice * pt->nblocksy * pt->stride;
 302       }
 303       else {
 304          assert(face == 0);
 305          assert(zslice == 0);
 306       }
 307       return pt;
 308    }
 309    return NULL;
 310 }
 311
 312
 313 static void
 314 softpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 315 {
 316    /* Effectively do the texture_update work here - if texture images
 317     * needed post-processing to put them into hardware layout, this is
 318     * where it would happen.  For softpipe, nothing to do.
 319     */
 320    assert (transfer->texture);
 321    pipe_texture_reference(&transfer->texture, NULL);
 322    FREE(transfer);
 323 }
 324
 325
 326 static void *
 327 softpipe_transfer_map( struct pipe_screen *screen,
 328                        struct pipe_transfer *transfer )
 329 {
 330    ubyte *map, *xfer_map;
 331    struct softpipe_texture *spt;
 332    unsigned flags = 0;
 333
 334    assert(transfer->texture);
 335    spt = softpipe_texture(transfer->texture);
 336
 337    if (transfer->usage != PIPE_TRANSFER_READ) {
 338       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 339    }
 340
 341    if (transfer->usage != PIPE_TRANSFER_WRITE) {
 342       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 343    }
 344
 345    map = pipe_buffer_map(screen, spt->buffer, flags);
 346    if (map == NULL)
 347       return NULL;
 348
 349    /* May want to different things here depending on read/write nature
 350     * of the map:
 351     */
 352    if (transfer->texture && transfer->usage != PIPE_TRANSFER_READ)
 353    {
 354       /* Do something to notify sharing contexts of a texture change.
 355        * In softpipe, that would mean flushing the texture cache.
 356        */
 357       softpipe_screen(screen)->timestamp++;
 358    }
 359
 360    xfer_map = map + softpipe_transfer(transfer)->offset +
 361       transfer->y / transfer->block.height * transfer->stride +
 362       transfer->x / transfer->block.width * transfer->block.size;
 363    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 364    return xfer_map;
 365 }
 366
 367
 368 static void
 369 softpipe_transfer_unmap(struct pipe_screen *screen,
 370                        struct pipe_transfer *transfer)
 371 {
 372    struct softpipe_texture *spt;
 373
 374    assert(transfer->texture);
 375    spt = softpipe_texture(transfer->texture);
 376
 377    pipe_buffer_unmap( screen, spt->buffer );
 378 }
 379
 380
 381 void
 382 softpipe_init_texture_funcs(struct softpipe_context *sp)
 383 {
 384 }
 385
 386
 387 void
 388 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 389 {
 390    screen->texture_create = softpipe_texture_create;
 391    screen->texture_blanket = softpipe_texture_blanket;
 392    screen->texture_destroy = softpipe_texture_destroy;
 393
 394    screen->get_tex_surface = softpipe_get_tex_surface;
 395    screen->tex_surface_destroy = softpipe_tex_surface_destroy;
 396
 397    screen->get_tex_transfer = softpipe_get_tex_transfer;
 398    screen->tex_transfer_destroy = softpipe_tex_transfer_destroy;
 399    screen->transfer_map = softpipe_transfer_map;
 400    screen->transfer_unmap = softpipe_transfer_unmap;
 401 }
 402
 403
 404 boolean
 405 softpipe_get_texture_buffer( struct pipe_texture *texture,
 406                              struct pipe_buffer **buf,
 407                              unsigned *stride )
 408 {
 409    struct softpipe_texture *tex = (struct softpipe_texture *)texture;
 410
 411    if (!tex)
 412       return FALSE;
 413
 414    pipe_buffer_reference(buf, tex->buffer);
 415
 416    if (stride)
 417       *stride = tex->stride[0];
 418
 419    return TRUE;
 420 }