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_state.h"
  44 #include "lp_texture.h"
  45 #include "lp_tile_size.h"
  46 #include "lp_winsys.h"
  47
  48
  49 /**
  50  * Conventional allocation path for non-display textures:
  51  * Simple, maximally packed layout.
  52  */
  53 static boolean
  54 llvmpipe_texture_layout(struct llvmpipe_screen *screen,
  55                         struct llvmpipe_texture *lpt)
  56 {
  57    struct pipe_texture *pt = &lpt->base;
  58    unsigned level;
  59    unsigned width = pt->width0;
  60    unsigned height = pt->height0;
  61    unsigned depth = pt->depth0;
  62    unsigned buffer_size = 0;
  63
  64    for (level = 0; level <= pt->last_level; level++) {
  65       unsigned nblocksx, nblocksy;
  66
  67       /* Allocate storage for whole quads. This is particularly important
  68        * for depth surfaces, which are currently stored in a swizzled format.
  69        */
  70       nblocksx = util_format_get_nblocksx(pt->format, align(width, TILE_SIZE));
  71       nblocksy = util_format_get_nblocksy(pt->format, align(height, TILE_SIZE));
  72
  73       lpt->stride[level] = align(nblocksx * util_format_get_blocksize(pt->format), 16);
  74
  75       lpt->level_offset[level] = buffer_size;
  76
  77       buffer_size += (nblocksy *
  78                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  79                       lpt->stride[level]);
  80
  81       width = u_minify(width, 1);
  82       height = u_minify(height, 1);
  83       depth = u_minify(depth, 1);
  84    }
  85
  86    lpt->data = align_malloc(buffer_size, 16);
  87
  88    return lpt->data != NULL;
  89 }
  90
  91
  92
  93 static boolean
  94 llvmpipe_displaytarget_layout(struct llvmpipe_screen *screen,
  95                               struct llvmpipe_texture *lpt)
  96 {
  97    struct llvmpipe_winsys *winsys = screen->winsys;
  98
  99    /* Round up the surface size to a multiple of the tile size to
 100     * avoid tile clipping.
 101     */
 102    unsigned width = align(lpt->base.width0, TILE_SIZE);
 103    unsigned height = align(lpt->base.height0, TILE_SIZE);
 104
 105    lpt->dt = winsys->displaytarget_create(winsys,
 106                                           lpt->base.format,
 107                                           width, height,
 108                                           16,
 109                                           &lpt->stride[0] );
 110
 111    return lpt->dt != NULL;
 112 }
 113
 114
 115 static struct pipe_texture *
 116 llvmpipe_texture_create(struct pipe_screen *_screen,
 117                         const struct pipe_texture *templat)
 118 {
 119    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 120    struct llvmpipe_texture *lpt = CALLOC_STRUCT(llvmpipe_texture);
 121    if (!lpt)
 122       return NULL;
 123
 124    lpt->base = *templat;
 125    pipe_reference_init(&lpt->base.reference, 1);
 126    lpt->base.screen = &screen->base;
 127
 128    /* XXX: The xlib state tracker is brain-dead and will request
 129     * PIPE_FORMAT_Z16_UNORM no matter how much we tell it we don't support it.
 130     */
 131    if (lpt->base.format == PIPE_FORMAT_Z16_UNORM)
 132       lpt->base.format = PIPE_FORMAT_Z32_UNORM;
 133
 134    if (lpt->base.tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 135                               PIPE_TEXTURE_USAGE_PRIMARY)) {
 136       if (!llvmpipe_displaytarget_layout(screen, lpt))
 137          goto fail;
 138    }
 139    else {
 140       if (!llvmpipe_texture_layout(screen, lpt))
 141          goto fail;
 142    }
 143
 144    return &lpt->base;
 145
 146  fail:
 147    FREE(lpt);
 148    return NULL;
 149 }
 150
 151
 152 static struct pipe_texture *
 153 llvmpipe_texture_blanket(struct pipe_screen * screen,
 154                          const struct pipe_texture *base,
 155                          const unsigned *stride,
 156                          struct pipe_buffer *buffer)
 157 {
 158    /* FIXME */
 159 #if 0
 160    struct llvmpipe_texture *lpt;
 161    assert(screen);
 162
 163    /* Only supports one type */
 164    if (base->target != PIPE_TEXTURE_2D ||
 165        base->last_level != 0 ||
 166        base->depth0 != 1) {
 167       return NULL;
 168    }
 169
 170    lpt = CALLOC_STRUCT(llvmpipe_texture);
 171    if (!lpt)
 172       return NULL;
 173
 174    lpt->base = *base;
 175    pipe_reference_init(&lpt->base.reference, 1);
 176    lpt->base.screen = screen;
 177    lpt->stride[0] = stride[0];
 178
 179    pipe_buffer_reference(&lpt->buffer, buffer);
 180
 181    return &lpt->base;
 182 #else
 183    debug_printf("llvmpipe_texture_blanket() not implemented!");
 184    return NULL;
 185 #endif
 186 }
 187
 188
 189 static void
 190 llvmpipe_texture_destroy(struct pipe_texture *pt)
 191 {
 192    struct llvmpipe_screen *screen = llvmpipe_screen(pt->screen);
 193    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 194
 195    if (lpt->dt) {
 196       /* display target */
 197       struct llvmpipe_winsys *winsys = screen->winsys;
 198       winsys->displaytarget_destroy(winsys, lpt->dt);
 199    }
 200    else {
 201       /* regular texture */
 202       align_free(lpt->data);
 203    }
 204
 205    FREE(lpt);
 206 }
 207
 208
 209 static struct pipe_surface *
 210 llvmpipe_get_tex_surface(struct pipe_screen *screen,
 211                          struct pipe_texture *pt,
 212                          unsigned face, unsigned level, unsigned zslice,
 213                          unsigned usage)
 214 {
 215    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 216    struct pipe_surface *ps;
 217
 218    assert(level <= pt->last_level);
 219
 220    ps = CALLOC_STRUCT(pipe_surface);
 221    if (ps) {
 222       pipe_reference_init(&ps->reference, 1);
 223       pipe_texture_reference(&ps->texture, pt);
 224       ps->format = pt->format;
 225       ps->width = u_minify(pt->width0, level);
 226       ps->height = u_minify(pt->height0, level);
 227       ps->offset = lpt->level_offset[level];
 228       ps->usage = usage;
 229
 230       /* Because we are llvmpipe, anything that the state tracker
 231        * thought was going to be done with the GPU will actually get
 232        * done with the CPU.  Let's adjust the flags to take that into
 233        * account.
 234        */
 235       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 236          /* GPU_WRITE means "render" and that can involve reads (blending) */
 237          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 238       }
 239
 240       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 241          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 242
 243       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 244                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 245          /* Mark the surface as dirty. */
 246          lpt->timestamp++;
 247          llvmpipe_screen(screen)->timestamp++;
 248       }
 249
 250       ps->face = face;
 251       ps->level = level;
 252       ps->zslice = zslice;
 253
 254       /* XXX shouldn't that rather be
 255          tex_height = align(ps->height, 2);
 256          to account for alignment done in llvmpipe_texture_layout ?
 257       */
 258       if (pt->target == PIPE_TEXTURE_CUBE) {
 259          unsigned tex_height = ps->height;
 260          ps->offset += face * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 261       }
 262       else if (pt->target == PIPE_TEXTURE_3D) {
 263          unsigned tex_height = ps->height;
 264          ps->offset += zslice * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 265       }
 266       else {
 267          assert(face == 0);
 268          assert(zslice == 0);
 269       }
 270    }
 271    return ps;
 272 }
 273
 274
 275 static void
 276 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 277 {
 278    /* Effectively do the texture_update work here - if texture images
 279     * needed post-processing to put them into hardware layout, this is
 280     * where it would happen.  For llvmpipe, nothing to do.
 281     */
 282    assert(surf->texture);
 283    pipe_texture_reference(&surf->texture, NULL);
 284    FREE(surf);
 285 }
 286
 287
 288 static struct pipe_transfer *
 289 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 290                           struct pipe_texture *texture,
 291                           unsigned face, unsigned level, unsigned zslice,
 292                           enum pipe_transfer_usage usage,
 293                           unsigned x, unsigned y, unsigned w, unsigned h)
 294 {
 295    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 296    struct llvmpipe_transfer *lpt;
 297
 298    assert(texture);
 299    assert(level <= texture->last_level);
 300
 301    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 302    if (lpt) {
 303       struct pipe_transfer *pt = &lpt->base;
 304       pipe_texture_reference(&pt->texture, texture);
 305       pt->x = x;
 306       pt->y = y;
 307       pt->width = align(w, TILE_SIZE);
 308       pt->height = align(h, TILE_SIZE);
 309       pt->stride = lptex->stride[level];
 310       pt->usage = usage;
 311       pt->face = face;
 312       pt->level = level;
 313       pt->zslice = zslice;
 314
 315       lpt->offset = lptex->level_offset[level];
 316
 317       /* XXX shouldn't that rather be
 318          tex_height = align(u_minify(texture->height0, level), 2)
 319          to account for alignment done in llvmpipe_texture_layout ?
 320       */
 321       if (texture->target == PIPE_TEXTURE_CUBE) {
 322          unsigned tex_height = u_minify(texture->height0, level);
 323          lpt->offset += face *  util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 324       }
 325       else if (texture->target == PIPE_TEXTURE_3D) {
 326          unsigned tex_height = u_minify(texture->height0, level);
 327          lpt->offset += zslice * util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 328       }
 329       else {
 330          assert(face == 0);
 331          assert(zslice == 0);
 332       }
 333       return pt;
 334    }
 335    return NULL;
 336 }
 337
 338
 339 static void
 340 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 341 {
 342    /* Effectively do the texture_update work here - if texture images
 343     * needed post-processing to put them into hardware layout, this is
 344     * where it would happen.  For llvmpipe, nothing to do.
 345     */
 346    assert (transfer->texture);
 347    pipe_texture_reference(&transfer->texture, NULL);
 348    FREE(transfer);
 349 }
 350
 351
 352 static void *
 353 llvmpipe_transfer_map( struct pipe_screen *_screen,
 354                        struct pipe_transfer *transfer )
 355 {
 356    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 357    ubyte *map, *xfer_map;
 358    struct llvmpipe_texture *lpt;
 359    enum pipe_format format;
 360
 361    assert(transfer->texture);
 362    lpt = llvmpipe_texture(transfer->texture);
 363    format = lpt->base.format;
 364
 365    if (lpt->dt) {
 366       /* display target */
 367       struct llvmpipe_winsys *winsys = screen->winsys;
 368
 369       map = winsys->displaytarget_map(winsys, lpt->dt,
 370                                       pipe_transfer_buffer_flags(transfer));
 371       if (map == NULL)
 372          return NULL;
 373    }
 374    else {
 375       /* regular texture */
 376       map = lpt->data;
 377    }
 378
 379    /* May want to different things here depending on read/write nature
 380     * of the map:
 381     */
 382    if (transfer->texture && (transfer->usage & PIPE_TRANSFER_WRITE)) {
 383       /* Do something to notify sharing contexts of a texture change.
 384        */
 385       screen->timestamp++;
 386    }
 387
 388    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 389       transfer->y / util_format_get_blockheight(format) * transfer->stride +
 390       transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 391    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 392    return xfer_map;
 393 }
 394
 395
 396 static void
 397 llvmpipe_transfer_unmap(struct pipe_screen *screen,
 398                        struct pipe_transfer *transfer)
 399 {
 400    struct llvmpipe_screen *lp_screen = llvmpipe_screen(screen);
 401    struct llvmpipe_texture *lpt;
 402
 403    assert(transfer->texture);
 404    lpt = llvmpipe_texture(transfer->texture);
 405
 406    if (lpt->dt) {
 407       /* display target */
 408       struct llvmpipe_winsys *winsys = lp_screen->winsys;
 409       winsys->displaytarget_unmap(winsys, lpt->dt);
 410    }
 411 }
 412
 413
 414 void
 415 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 416 {
 417    screen->texture_create = llvmpipe_texture_create;
 418    screen->texture_blanket = llvmpipe_texture_blanket;
 419    screen->texture_destroy = llvmpipe_texture_destroy;
 420
 421    screen->get_tex_surface = llvmpipe_get_tex_surface;
 422    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 423
 424    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 425    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 426    screen->transfer_map = llvmpipe_transfer_map;
 427    screen->transfer_unmap = llvmpipe_transfer_unmap;
 428 }