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 "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 "lp_context.h"
  41 #include "lp_state.h"
  42 #include "lp_texture.h"
  43 #include "lp_tex_cache.h"
  44 #include "lp_screen.h"
  45 #include "lp_winsys.h"
  46
  47
  48 /* Simple, maximally packed layout.
  49  */
  50
  51 static unsigned minify( unsigned d )
  52 {
  53    return MAX2(1, d>>1);
  54 }
  55
  56
  57 /* Conventional allocation path for non-display textures:
  58  */
  59 static boolean
  60 llvmpipe_texture_layout(struct pipe_screen *screen,
  61                         struct llvmpipe_texture * lpt)
  62 {
  63    struct pipe_texture *pt = &lpt->base;
  64    unsigned level;
  65    unsigned width = pt->width[0];
  66    unsigned height = pt->height[0];
  67    unsigned depth = pt->depth[0];
  68
  69    unsigned buffer_size = 0;
  70
  71    pf_get_block(lpt->base.format, &lpt->base.block);
  72
  73    for (level = 0; level <= pt->last_level; level++) {
  74       pt->width[level] = width;
  75       pt->height[level] = height;
  76       pt->depth[level] = depth;
  77       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  78       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  79       lpt->stride[level] = pt->nblocksx[level]*pt->block.size;
  80
  81       lpt->level_offset[level] = buffer_size;
  82
  83       buffer_size += (pt->nblocksy[level] *
  84                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  85                       lpt->stride[level]);
  86
  87       width  = minify(width);
  88       height = minify(height);
  89       depth = minify(depth);
  90    }
  91
  92    lpt->buffer = screen->buffer_create(screen, 32,
  93                                        PIPE_BUFFER_USAGE_PIXEL,
  94                                        buffer_size);
  95
  96    return lpt->buffer != NULL;
  97 }
  98
  99 static boolean
 100 llvmpipe_displaytarget_layout(struct pipe_screen *screen,
 101                               struct llvmpipe_texture * lpt)
 102 {
 103    unsigned usage = (PIPE_BUFFER_USAGE_CPU_READ_WRITE |
 104                      PIPE_BUFFER_USAGE_GPU_READ_WRITE);
 105
 106    pf_get_block(lpt->base.format, &lpt->base.block);
 107    lpt->base.nblocksx[0] = pf_get_nblocksx(&lpt->base.block, lpt->base.width[0]);
 108    lpt->base.nblocksy[0] = pf_get_nblocksy(&lpt->base.block, lpt->base.height[0]);
 109
 110    lpt->buffer = screen->surface_buffer_create( screen,
 111                                                 lpt->base.width[0],
 112                                                 lpt->base.height[0],
 113                                                 lpt->base.format,
 114                                                 usage,
 115                                                 &lpt->stride[0]);
 116
 117    return lpt->buffer != NULL;
 118 }
 119
 120
 121
 122
 123
 124 static struct pipe_texture *
 125 llvmpipe_texture_create(struct pipe_screen *screen,
 126                         const struct pipe_texture *templat)
 127 {
 128    struct llvmpipe_texture *lpt = CALLOC_STRUCT(llvmpipe_texture);
 129    if (!lpt)
 130       return NULL;
 131
 132    lpt->base = *templat;
 133    pipe_reference_init(&lpt->base.reference, 1);
 134    lpt->base.screen = screen;
 135
 136    /* XXX: The xlib state tracker is brain-dead and will request
 137     * PIPE_FORMAT_Z16_UNORM no matter how much we tell it we don't support it.
 138     */
 139    if(lpt->base.format == PIPE_FORMAT_Z16_UNORM)
 140       lpt->base.format = PIPE_FORMAT_Z32_UNORM;
 141
 142    if (lpt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 143       if (!llvmpipe_displaytarget_layout(screen, lpt))
 144          goto fail;
 145    }
 146    else {
 147       if (!llvmpipe_texture_layout(screen, lpt))
 148          goto fail;
 149    }
 150
 151    return &lpt->base;
 152
 153  fail:
 154    FREE(lpt);
 155    return NULL;
 156 }
 157
 158
 159 static struct pipe_texture *
 160 llvmpipe_texture_blanket(struct pipe_screen * screen,
 161                          const struct pipe_texture *base,
 162                          const unsigned *stride,
 163                          struct pipe_buffer *buffer)
 164 {
 165    struct llvmpipe_texture *lpt;
 166    assert(screen);
 167
 168    /* Only supports one type */
 169    if (base->target != PIPE_TEXTURE_2D ||
 170        base->last_level != 0 ||
 171        base->depth[0] != 1) {
 172       return NULL;
 173    }
 174
 175    lpt = CALLOC_STRUCT(llvmpipe_texture);
 176    if (!lpt)
 177       return NULL;
 178
 179    lpt->base = *base;
 180    pipe_reference_init(&lpt->base.reference, 1);
 181    lpt->base.screen = screen;
 182    lpt->base.nblocksx[0] = pf_get_nblocksx(&lpt->base.block, lpt->base.width[0]);
 183    lpt->base.nblocksy[0] = pf_get_nblocksy(&lpt->base.block, lpt->base.height[0]);
 184    lpt->stride[0] = stride[0];
 185
 186    pipe_buffer_reference(&lpt->buffer, buffer);
 187
 188    return &lpt->base;
 189 }
 190
 191
 192 static void
 193 llvmpipe_texture_destroy(struct pipe_texture *pt)
 194 {
 195    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 196
 197    pipe_buffer_reference(&lpt->buffer, NULL);
 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 = pt->width[level];
 219       ps->height = pt->height[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.  The tile cache will look for this. */
 239          lpt->timestamp++;
 240          llvmpipe_screen(screen)->timestamp++;
 241       }
 242
 243       ps->face = face;
 244       ps->level = level;
 245       ps->zslice = zslice;
 246
 247       if (pt->target == PIPE_TEXTURE_CUBE) {
 248          ps->offset += face * pt->nblocksy[level] * lpt->stride[level];
 249       }
 250       else if (pt->target == PIPE_TEXTURE_3D) {
 251          ps->offset += zslice * pt->nblocksy[level] * lpt->stride[level];
 252       }
 253       else {
 254          assert(face == 0);
 255          assert(zslice == 0);
 256       }
 257    }
 258    return ps;
 259 }
 260
 261
 262 static void
 263 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 264 {
 265    /* Effectively do the texture_update work here - if texture images
 266     * needed post-processing to put them into hardware layout, this is
 267     * where it would happen.  For llvmpipe, nothing to do.
 268     */
 269    assert(surf->texture);
 270    pipe_texture_reference(&surf->texture, NULL);
 271    FREE(surf);
 272 }
 273
 274
 275 static struct pipe_transfer *
 276 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 277                           struct pipe_texture *texture,
 278                           unsigned face, unsigned level, unsigned zslice,
 279                           enum pipe_transfer_usage usage,
 280                           unsigned x, unsigned y, unsigned w, unsigned h)
 281 {
 282    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 283    struct llvmpipe_transfer *lpt;
 284
 285    assert(texture);
 286    assert(level <= texture->last_level);
 287
 288    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 289    if (lpt) {
 290       struct pipe_transfer *pt = &lpt->base;
 291       pipe_texture_reference(&pt->texture, texture);
 292       pt->format = texture->format;
 293       pt->block = texture->block;
 294       pt->x = x;
 295       pt->y = y;
 296       pt->width = w;
 297       pt->height = h;
 298       pt->nblocksx = texture->nblocksx[level];
 299       pt->nblocksy = texture->nblocksy[level];
 300       pt->stride = lptex->stride[level];
 301       pt->usage = usage;
 302       pt->face = face;
 303       pt->level = level;
 304       pt->zslice = zslice;
 305
 306       lpt->offset = lptex->level_offset[level];
 307
 308       if (texture->target == PIPE_TEXTURE_CUBE) {
 309          lpt->offset += face * pt->nblocksy * pt->stride;
 310       }
 311       else if (texture->target == PIPE_TEXTURE_3D) {
 312          lpt->offset += zslice * pt->nblocksy * pt->stride;
 313       }
 314       else {
 315          assert(face == 0);
 316          assert(zslice == 0);
 317       }
 318       return pt;
 319    }
 320    return NULL;
 321 }
 322
 323
 324 static void
 325 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 326 {
 327    /* Effectively do the texture_update work here - if texture images
 328     * needed post-processing to put them into hardware layout, this is
 329     * where it would happen.  For llvmpipe, nothing to do.
 330     */
 331    assert (transfer->texture);
 332    pipe_texture_reference(&transfer->texture, NULL);
 333    FREE(transfer);
 334 }
 335
 336
 337 static void *
 338 llvmpipe_transfer_map( struct pipe_screen *screen,
 339                        struct pipe_transfer *transfer )
 340 {
 341    ubyte *map, *xfer_map;
 342    struct llvmpipe_texture *lpt;
 343    unsigned flags = 0;
 344
 345    assert(transfer->texture);
 346    lpt = llvmpipe_texture(transfer->texture);
 347
 348    if (transfer->usage != PIPE_TRANSFER_READ) {
 349       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 350    }
 351
 352    if (transfer->usage != PIPE_TRANSFER_WRITE) {
 353       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 354    }
 355
 356    map = pipe_buffer_map(screen, lpt->buffer, flags);
 357    if (map == NULL)
 358       return NULL;
 359
 360    /* May want to different things here depending on read/write nature
 361     * of the map:
 362     */
 363    if (transfer->texture && transfer->usage != PIPE_TRANSFER_READ)
 364    {
 365       /* Do something to notify sharing contexts of a texture change.
 366        * In llvmpipe, that would mean flushing the texture cache.
 367        */
 368       llvmpipe_screen(screen)->timestamp++;
 369    }
 370
 371    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 372       transfer->y / transfer->block.height * transfer->stride +
 373       transfer->x / transfer->block.width * transfer->block.size;
 374    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 375    return xfer_map;
 376 }
 377
 378
 379 static void
 380 llvmpipe_transfer_unmap(struct pipe_screen *screen,
 381                        struct pipe_transfer *transfer)
 382 {
 383    struct llvmpipe_texture *lpt;
 384
 385    assert(transfer->texture);
 386    lpt = llvmpipe_texture(transfer->texture);
 387
 388    pipe_buffer_unmap( screen, lpt->buffer );
 389 }
 390
 391
 392 void
 393 llvmpipe_init_texture_funcs(struct llvmpipe_context *lp)
 394 {
 395 }
 396
 397
 398 void
 399 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 400 {
 401    screen->texture_create = llvmpipe_texture_create;
 402    screen->texture_blanket = llvmpipe_texture_blanket;
 403    screen->texture_destroy = llvmpipe_texture_destroy;
 404
 405    screen->get_tex_surface = llvmpipe_get_tex_surface;
 406    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 407
 408    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 409    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 410    screen->transfer_map = llvmpipe_transfer_map;
 411    screen->transfer_unmap = llvmpipe_transfer_unmap;
 412 }
 413
 414
 415 boolean
 416 llvmpipe_get_texture_buffer( struct pipe_texture *texture,
 417                              struct pipe_buffer **buf,
 418                              unsigned *stride )
 419 {
 420    struct llvmpipe_texture *tex = (struct llvmpipe_texture *)texture;
 421
 422    if (!tex)
 423       return FALSE;
 424
 425    pipe_buffer_reference(buf, tex->buffer);
 426
 427    if (stride)
 428       *stride = tex->stride[0];
 429
 430    return TRUE;
 431 }