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
  38 #include "util/u_format.h"
  39 #include "util/u_math.h"
  40 #include "util/u_memory.h"
  41
  42 #include "lp_context.h"
  43 #include "lp_screen.h"
  44 #include "lp_state.h"
  45 #include "lp_texture.h"
  46 #include "lp_tile_size.h"
  47 #include "lp_winsys.h"
  48
  49
  50 /**
  51  * Conventional allocation path for non-display textures:
  52  * Simple, maximally packed layout.
  53  */
  54 static boolean
  55 llvmpipe_texture_layout(struct llvmpipe_screen *screen,
  56                         struct llvmpipe_texture *lpt)
  57 {
  58    struct pipe_texture *pt = &lpt->base;
  59    unsigned level;
  60    unsigned width = pt->width0;
  61    unsigned height = pt->height0;
  62    unsigned depth = pt->depth0;
  63    unsigned buffer_size = 0;
  64
  65    for (level = 0; level <= pt->last_level; level++) {
  66       unsigned nblocksx, nblocksy;
  67
  68       /* Allocate storage for whole quads. This is particularly important
  69        * for depth surfaces, which are currently stored in a swizzled format.
  70        */
  71       nblocksx = util_format_get_nblocksx(pt->format, align(width, TILE_SIZE));
  72       nblocksy = util_format_get_nblocksy(pt->format, align(height, TILE_SIZE));
  73
  74       lpt->stride[level] = align(nblocksx * util_format_get_blocksize(pt->format), 16);
  75
  76       lpt->level_offset[level] = buffer_size;
  77
  78       buffer_size += (nblocksy *
  79                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  80                       lpt->stride[level]);
  81
  82       width = u_minify(width, 1);
  83       height = u_minify(height, 1);
  84       depth = u_minify(depth, 1);
  85    }
  86
  87    lpt->data = align_malloc(buffer_size, 16);
  88
  89    return lpt->data != NULL;
  90 }
  91
  92
  93
  94 static boolean
  95 llvmpipe_displaytarget_layout(struct llvmpipe_screen *screen,
  96                               struct llvmpipe_texture *lpt)
  97 {
  98    struct llvmpipe_winsys *winsys = screen->winsys;
  99
 100    /* Round up the surface size to a multiple of the tile size to
 101     * avoid tile clipping.
 102     */
 103    unsigned width = align(lpt->base.width0, TILE_SIZE);
 104    unsigned height = align(lpt->base.height0, TILE_SIZE);
 105
 106    lpt->dt = winsys->displaytarget_create(winsys,
 107                                           lpt->base.format,
 108                                           width, height,
 109                                           16,
 110                                           &lpt->stride[0] );
 111
 112    return lpt->dt != NULL;
 113 }
 114
 115
 116 static struct pipe_texture *
 117 llvmpipe_texture_create(struct pipe_screen *_screen,
 118                         const struct pipe_texture *templat)
 119 {
 120    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 121    struct llvmpipe_texture *lpt = CALLOC_STRUCT(llvmpipe_texture);
 122    if (!lpt)
 123       return NULL;
 124
 125    lpt->base = *templat;
 126    pipe_reference_init(&lpt->base.reference, 1);
 127    lpt->base.screen = &screen->base;
 128
 129    /* XXX: The xlib state tracker is brain-dead and will request
 130     * PIPE_FORMAT_Z16_UNORM no matter how much we tell it we don't support it.
 131     */
 132    if (lpt->base.format == PIPE_FORMAT_Z16_UNORM)
 133       lpt->base.format = PIPE_FORMAT_Z32_UNORM;
 134
 135    if (lpt->base.tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 136                               PIPE_TEXTURE_USAGE_PRIMARY)) {
 137       if (!llvmpipe_displaytarget_layout(screen, lpt))
 138          goto fail;
 139    }
 140    else {
 141       if (!llvmpipe_texture_layout(screen, lpt))
 142          goto fail;
 143    }
 144
 145    return &lpt->base;
 146
 147  fail:
 148    FREE(lpt);
 149    return NULL;
 150 }
 151
 152
 153 static struct pipe_texture *
 154 llvmpipe_texture_blanket(struct pipe_screen * screen,
 155                          const struct pipe_texture *base,
 156                          const unsigned *stride,
 157                          struct pipe_buffer *buffer)
 158 {
 159    /* FIXME */
 160 #if 0
 161    struct llvmpipe_texture *lpt;
 162    assert(screen);
 163
 164    /* Only supports one type */
 165    if (base->target != PIPE_TEXTURE_2D ||
 166        base->last_level != 0 ||
 167        base->depth0 != 1) {
 168       return NULL;
 169    }
 170
 171    lpt = CALLOC_STRUCT(llvmpipe_texture);
 172    if (!lpt)
 173       return NULL;
 174
 175    lpt->base = *base;
 176    pipe_reference_init(&lpt->base.reference, 1);
 177    lpt->base.screen = screen;
 178    lpt->stride[0] = stride[0];
 179
 180    pipe_buffer_reference(&lpt->buffer, buffer);
 181
 182    return &lpt->base;
 183 #else
 184    debug_printf("llvmpipe_texture_blanket() not implemented!");
 185    return NULL;
 186 #endif
 187 }
 188
 189
 190 static void
 191 llvmpipe_texture_destroy(struct pipe_texture *pt)
 192 {
 193    struct llvmpipe_screen *screen = llvmpipe_screen(pt->screen);
 194    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 195
 196    if (lpt->dt) {
 197       /* display target */
 198       struct llvmpipe_winsys *winsys = screen->winsys;
 199       winsys->displaytarget_destroy(winsys, lpt->dt);
 200    }
 201    else {
 202       /* regular texture */
 203       align_free(lpt->data);
 204    }
 205
 206    FREE(lpt);
 207 }
 208
 209
 210 static struct pipe_surface *
 211 llvmpipe_get_tex_surface(struct pipe_screen *screen,
 212                          struct pipe_texture *pt,
 213                          unsigned face, unsigned level, unsigned zslice,
 214                          unsigned usage)
 215 {
 216    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 217    struct pipe_surface *ps;
 218
 219    assert(level <= pt->last_level);
 220
 221    ps = CALLOC_STRUCT(pipe_surface);
 222    if (ps) {
 223       pipe_reference_init(&ps->reference, 1);
 224       pipe_texture_reference(&ps->texture, pt);
 225       ps->format = pt->format;
 226       ps->width = u_minify(pt->width0, level);
 227       ps->height = u_minify(pt->height0, level);
 228       ps->offset = lpt->level_offset[level];
 229       ps->usage = usage;
 230
 231       /* Because we are llvmpipe, anything that the state tracker
 232        * thought was going to be done with the GPU will actually get
 233        * done with the CPU.  Let's adjust the flags to take that into
 234        * account.
 235        */
 236       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 237          /* GPU_WRITE means "render" and that can involve reads (blending) */
 238          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 239       }
 240
 241       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 242          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 243
 244       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 245                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 246          /* Mark the surface as dirty. */
 247          lpt->timestamp++;
 248          llvmpipe_screen(screen)->timestamp++;
 249       }
 250
 251       ps->face = face;
 252       ps->level = level;
 253       ps->zslice = zslice;
 254
 255       /* XXX shouldn't that rather be
 256          tex_height = align(ps->height, 2);
 257          to account for alignment done in llvmpipe_texture_layout ?
 258       */
 259       if (pt->target == PIPE_TEXTURE_CUBE) {
 260          unsigned tex_height = ps->height;
 261          ps->offset += face * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 262       }
 263       else if (pt->target == PIPE_TEXTURE_3D) {
 264          unsigned tex_height = ps->height;
 265          ps->offset += zslice * util_format_get_nblocksy(pt->format, tex_height) * lpt->stride[level];
 266       }
 267       else {
 268          assert(face == 0);
 269          assert(zslice == 0);
 270       }
 271    }
 272    return ps;
 273 }
 274
 275
 276 static void
 277 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 278 {
 279    /* Effectively do the texture_update work here - if texture images
 280     * needed post-processing to put them into hardware layout, this is
 281     * where it would happen.  For llvmpipe, nothing to do.
 282     */
 283    assert(surf->texture);
 284    pipe_texture_reference(&surf->texture, NULL);
 285    FREE(surf);
 286 }
 287
 288
 289 static struct pipe_transfer *
 290 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 291                           struct pipe_texture *texture,
 292                           unsigned face, unsigned level, unsigned zslice,
 293                           enum pipe_transfer_usage usage,
 294                           unsigned x, unsigned y, unsigned w, unsigned h)
 295 {
 296    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 297    struct llvmpipe_transfer *lpt;
 298
 299    assert(texture);
 300    assert(level <= texture->last_level);
 301
 302    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 303    if (lpt) {
 304       struct pipe_transfer *pt = &lpt->base;
 305       pipe_texture_reference(&pt->texture, texture);
 306       pt->x = x;
 307       pt->y = y;
 308       pt->width = align(w, TILE_SIZE);
 309       pt->height = align(h, TILE_SIZE);
 310       pt->stride = lptex->stride[level];
 311       pt->usage = usage;
 312       pt->face = face;
 313       pt->level = level;
 314       pt->zslice = zslice;
 315
 316       lpt->offset = lptex->level_offset[level];
 317
 318       /* XXX shouldn't that rather be
 319          tex_height = align(u_minify(texture->height0, level), 2)
 320          to account for alignment done in llvmpipe_texture_layout ?
 321       */
 322       if (texture->target == PIPE_TEXTURE_CUBE) {
 323          unsigned tex_height = u_minify(texture->height0, level);
 324          lpt->offset += face *  util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 325       }
 326       else if (texture->target == PIPE_TEXTURE_3D) {
 327          unsigned tex_height = u_minify(texture->height0, level);
 328          lpt->offset += zslice * util_format_get_nblocksy(texture->format, tex_height) * pt->stride;
 329       }
 330       else {
 331          assert(face == 0);
 332          assert(zslice == 0);
 333       }
 334       return pt;
 335    }
 336    return NULL;
 337 }
 338
 339
 340 static void
 341 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 342 {
 343    /* Effectively do the texture_update work here - if texture images
 344     * needed post-processing to put them into hardware layout, this is
 345     * where it would happen.  For llvmpipe, nothing to do.
 346     */
 347    assert (transfer->texture);
 348    pipe_texture_reference(&transfer->texture, NULL);
 349    FREE(transfer);
 350 }
 351
 352
 353 static void *
 354 llvmpipe_transfer_map( struct pipe_screen *_screen,
 355                        struct pipe_transfer *transfer )
 356 {
 357    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 358    ubyte *map, *xfer_map;
 359    struct llvmpipe_texture *lpt;
 360    enum pipe_format format;
 361
 362    assert(transfer->texture);
 363    lpt = llvmpipe_texture(transfer->texture);
 364    format = lpt->base.format;
 365
 366    if (lpt->dt) {
 367       /* display target */
 368       struct llvmpipe_winsys *winsys = screen->winsys;
 369
 370       map = winsys->displaytarget_map(winsys, lpt->dt,
 371                                       pipe_transfer_buffer_flags(transfer));
 372       if (map == NULL)
 373          return NULL;
 374    }
 375    else {
 376       /* regular texture */
 377       map = lpt->data;
 378    }
 379
 380    /* May want to different things here depending on read/write nature
 381     * of the map:
 382     */
 383    if (transfer->texture && (transfer->usage & PIPE_TRANSFER_WRITE)) {
 384       /* Do something to notify sharing contexts of a texture change.
 385        */
 386       screen->timestamp++;
 387    }
 388
 389    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 390       transfer->y / util_format_get_blockheight(format) * transfer->stride +
 391       transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 392    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 393    return xfer_map;
 394 }
 395
 396
 397 static void
 398 llvmpipe_transfer_unmap(struct pipe_screen *screen,
 399                        struct pipe_transfer *transfer)
 400 {
 401    struct llvmpipe_screen *lp_screen = llvmpipe_screen(screen);
 402    struct llvmpipe_texture *lpt;
 403
 404    assert(transfer->texture);
 405    lpt = llvmpipe_texture(transfer->texture);
 406
 407    if (lpt->dt) {
 408       /* display target */
 409       struct llvmpipe_winsys *winsys = lp_screen->winsys;
 410       winsys->displaytarget_unmap(winsys, lpt->dt);
 411    }
 412 }
 413
 414
 415 void
 416 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 417 {
 418    screen->texture_create = llvmpipe_texture_create;
 419    screen->texture_blanket = llvmpipe_texture_blanket;
 420    screen->texture_destroy = llvmpipe_texture_destroy;
 421
 422    screen->get_tex_surface = llvmpipe_get_tex_surface;
 423    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 424
 425    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 426    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 427    screen->transfer_map = llvmpipe_transfer_map;
 428    screen->transfer_unmap = llvmpipe_transfer_unmap;
 429 }