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    for (level = 0; level <= pt->last_level; level++) {
  72       pt->width[level] = width;
  73       pt->height[level] = height;
  74       pt->depth[level] = depth;
  75       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  76       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  77       lpt->stride[level] = pt->nblocksx[level]*pt->block.size;
  78
  79       lpt->level_offset[level] = buffer_size;
  80
  81       buffer_size += (pt->nblocksy[level] *
  82                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  83                       lpt->stride[level]);
  84
  85       width  = minify(width);
  86       height = minify(height);
  87       depth = minify(depth);
  88    }
  89
  90    lpt->buffer = screen->buffer_create(screen, 32,
  91                                        PIPE_BUFFER_USAGE_PIXEL,
  92                                        buffer_size);
  93
  94    return lpt->buffer != NULL;
  95 }
  96
  97 static boolean
  98 llvmpipe_displaytarget_layout(struct pipe_screen *screen,
  99                               struct llvmpipe_texture * lpt)
 100 {
 101    unsigned usage = (PIPE_BUFFER_USAGE_CPU_READ_WRITE |
 102                      PIPE_BUFFER_USAGE_GPU_READ_WRITE);
 103
 104    lpt->base.nblocksx[0] = pf_get_nblocksx(&lpt->base.block, lpt->base.width[0]);
 105    lpt->base.nblocksy[0] = pf_get_nblocksy(&lpt->base.block, lpt->base.height[0]);
 106
 107    lpt->buffer = screen->surface_buffer_create( screen,
 108                                                 lpt->base.width[0],
 109                                                 lpt->base.height[0],
 110                                                 lpt->base.format,
 111                                                 usage,
 112                                                 &lpt->stride[0]);
 113
 114    return lpt->buffer != NULL;
 115 }
 116
 117
 118
 119
 120
 121 static struct pipe_texture *
 122 llvmpipe_texture_create(struct pipe_screen *screen,
 123                         const struct pipe_texture *templat)
 124 {
 125    struct llvmpipe_texture *lpt = CALLOC_STRUCT(llvmpipe_texture);
 126    if (!lpt)
 127       return NULL;
 128
 129    lpt->base = *templat;
 130    pipe_reference_init(&lpt->base.reference, 1);
 131    lpt->base.screen = screen;
 132
 133    if (lpt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 134       if (!llvmpipe_displaytarget_layout(screen, lpt))
 135          goto fail;
 136    }
 137    else {
 138       if (!llvmpipe_texture_layout(screen, lpt))
 139          goto fail;
 140    }
 141
 142    return &lpt->base;
 143
 144  fail:
 145    FREE(lpt);
 146    return NULL;
 147 }
 148
 149
 150 static struct pipe_texture *
 151 llvmpipe_texture_blanket(struct pipe_screen * screen,
 152                          const struct pipe_texture *base,
 153                          const unsigned *stride,
 154                          struct pipe_buffer *buffer)
 155 {
 156    struct llvmpipe_texture *lpt;
 157    assert(screen);
 158
 159    /* Only supports one type */
 160    if (base->target != PIPE_TEXTURE_2D ||
 161        base->last_level != 0 ||
 162        base->depth[0] != 1) {
 163       return NULL;
 164    }
 165
 166    lpt = CALLOC_STRUCT(llvmpipe_texture);
 167    if (!lpt)
 168       return NULL;
 169
 170    lpt->base = *base;
 171    pipe_reference_init(&lpt->base.reference, 1);
 172    lpt->base.screen = screen;
 173    lpt->base.nblocksx[0] = pf_get_nblocksx(&lpt->base.block, lpt->base.width[0]);
 174    lpt->base.nblocksy[0] = pf_get_nblocksy(&lpt->base.block, lpt->base.height[0]);
 175    lpt->stride[0] = stride[0];
 176
 177    pipe_buffer_reference(&lpt->buffer, buffer);
 178
 179    return &lpt->base;
 180 }
 181
 182
 183 static void
 184 llvmpipe_texture_destroy(struct pipe_texture *pt)
 185 {
 186    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 187
 188    pipe_buffer_reference(&lpt->buffer, NULL);
 189    FREE(lpt);
 190 }
 191
 192
 193 static struct pipe_surface *
 194 llvmpipe_get_tex_surface(struct pipe_screen *screen,
 195                          struct pipe_texture *pt,
 196                          unsigned face, unsigned level, unsigned zslice,
 197                          unsigned usage)
 198 {
 199    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 200    struct pipe_surface *ps;
 201
 202    assert(level <= pt->last_level);
 203
 204    ps = CALLOC_STRUCT(pipe_surface);
 205    if (ps) {
 206       pipe_reference_init(&ps->reference, 1);
 207       pipe_texture_reference(&ps->texture, pt);
 208       ps->format = pt->format;
 209       ps->width = pt->width[level];
 210       ps->height = pt->height[level];
 211       ps->offset = lpt->level_offset[level];
 212       ps->usage = usage;
 213
 214       /* Because we are llvmpipe, anything that the state tracker
 215        * thought was going to be done with the GPU will actually get
 216        * done with the CPU.  Let's adjust the flags to take that into
 217        * account.
 218        */
 219       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 220          /* GPU_WRITE means "render" and that can involve reads (blending) */
 221          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 222       }
 223
 224       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 225          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 226
 227       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 228                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 229          /* Mark the surface as dirty.  The tile cache will look for this. */
 230          lpt->timestamp++;
 231          llvmpipe_screen(screen)->timestamp++;
 232       }
 233
 234       ps->face = face;
 235       ps->level = level;
 236       ps->zslice = zslice;
 237
 238       if (pt->target == PIPE_TEXTURE_CUBE) {
 239          ps->offset += face * pt->nblocksy[level] * lpt->stride[level];
 240       }
 241       else if (pt->target == PIPE_TEXTURE_3D) {
 242          ps->offset += zslice * pt->nblocksy[level] * lpt->stride[level];
 243       }
 244       else {
 245          assert(face == 0);
 246          assert(zslice == 0);
 247       }
 248    }
 249    return ps;
 250 }
 251
 252
 253 static void
 254 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 255 {
 256    /* Effectively do the texture_update work here - if texture images
 257     * needed post-processing to put them into hardware layout, this is
 258     * where it would happen.  For llvmpipe, nothing to do.
 259     */
 260    assert(surf->texture);
 261    pipe_texture_reference(&surf->texture, NULL);
 262    FREE(surf);
 263 }
 264
 265
 266 static struct pipe_transfer *
 267 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 268                           struct pipe_texture *texture,
 269                           unsigned face, unsigned level, unsigned zslice,
 270                           enum pipe_transfer_usage usage,
 271                           unsigned x, unsigned y, unsigned w, unsigned h)
 272 {
 273    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 274    struct llvmpipe_transfer *lpt;
 275
 276    assert(texture);
 277    assert(level <= texture->last_level);
 278
 279    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 280    if (lpt) {
 281       struct pipe_transfer *pt = &lpt->base;
 282       pipe_texture_reference(&pt->texture, texture);
 283       pt->format = texture->format;
 284       pt->block = texture->block;
 285       pt->x = x;
 286       pt->y = y;
 287       pt->width = w;
 288       pt->height = h;
 289       pt->nblocksx = texture->nblocksx[level];
 290       pt->nblocksy = texture->nblocksy[level];
 291       pt->stride = lptex->stride[level];
 292       pt->usage = usage;
 293       pt->face = face;
 294       pt->level = level;
 295       pt->zslice = zslice;
 296
 297       lpt->offset = lptex->level_offset[level];
 298
 299       if (texture->target == PIPE_TEXTURE_CUBE) {
 300          lpt->offset += face * pt->nblocksy * pt->stride;
 301       }
 302       else if (texture->target == PIPE_TEXTURE_3D) {
 303          lpt->offset += zslice * pt->nblocksy * pt->stride;
 304       }
 305       else {
 306          assert(face == 0);
 307          assert(zslice == 0);
 308       }
 309       return pt;
 310    }
 311    return NULL;
 312 }
 313
 314
 315 static void
 316 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 317 {
 318    /* Effectively do the texture_update work here - if texture images
 319     * needed post-processing to put them into hardware layout, this is
 320     * where it would happen.  For llvmpipe, nothing to do.
 321     */
 322    assert (transfer->texture);
 323    pipe_texture_reference(&transfer->texture, NULL);
 324    FREE(transfer);
 325 }
 326
 327
 328 static void *
 329 llvmpipe_transfer_map( struct pipe_screen *screen,
 330                        struct pipe_transfer *transfer )
 331 {
 332    ubyte *map, *xfer_map;
 333    struct llvmpipe_texture *lpt;
 334    unsigned flags = 0;
 335
 336    assert(transfer->texture);
 337    lpt = llvmpipe_texture(transfer->texture);
 338
 339    if (transfer->usage != PIPE_TRANSFER_READ) {
 340       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 341    }
 342
 343    if (transfer->usage != PIPE_TRANSFER_WRITE) {
 344       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 345    }
 346
 347    map = pipe_buffer_map(screen, lpt->buffer, flags);
 348    if (map == NULL)
 349       return NULL;
 350
 351    /* May want to different things here depending on read/write nature
 352     * of the map:
 353     */
 354    if (transfer->texture && transfer->usage != PIPE_TRANSFER_READ)
 355    {
 356       /* Do something to notify sharing contexts of a texture change.
 357        * In llvmpipe, that would mean flushing the texture cache.
 358        */
 359       llvmpipe_screen(screen)->timestamp++;
 360    }
 361
 362    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 363       transfer->y / transfer->block.height * transfer->stride +
 364       transfer->x / transfer->block.width * transfer->block.size;
 365    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 366    return xfer_map;
 367 }
 368
 369
 370 static void
 371 llvmpipe_transfer_unmap(struct pipe_screen *screen,
 372                        struct pipe_transfer *transfer)
 373 {
 374    struct llvmpipe_texture *lpt;
 375
 376    assert(transfer->texture);
 377    lpt = llvmpipe_texture(transfer->texture);
 378
 379    pipe_buffer_unmap( screen, lpt->buffer );
 380 }
 381
 382
 383 void
 384 llvmpipe_init_texture_funcs(struct llvmpipe_context *lp)
 385 {
 386 }
 387
 388
 389 void
 390 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 391 {
 392    screen->texture_create = llvmpipe_texture_create;
 393    screen->texture_blanket = llvmpipe_texture_blanket;
 394    screen->texture_destroy = llvmpipe_texture_destroy;
 395
 396    screen->get_tex_surface = llvmpipe_get_tex_surface;
 397    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 398
 399    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 400    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 401    screen->transfer_map = llvmpipe_transfer_map;
 402    screen->transfer_unmap = llvmpipe_transfer_unmap;
 403 }
 404
 405
 406 boolean
 407 llvmpipe_get_texture_buffer( struct pipe_texture *texture,
 408                              struct pipe_buffer **buf,
 409                              unsigned *stride )
 410 {
 411    struct llvmpipe_texture *tex = (struct llvmpipe_texture *)texture;
 412
 413    if (!tex)
 414       return FALSE;
 415
 416    pipe_buffer_reference(buf, tex->buffer);
 417
 418    if (stride)
 419       *stride = tex->stride[0];
 420
 421    return TRUE;
 422 }