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_screen.h"
  44 #include "lp_winsys.h"
  45
  46
  47 /* Simple, maximally packed layout.
  48  */
  49
  50
  51 /* Conventional allocation path for non-display textures:
  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->width[0];
  60    unsigned height = pt->height[0];
  61    unsigned depth = pt->depth[0];
  62
  63    unsigned buffer_size = 0;
  64
  65    pf_get_block(lpt->base.format, &lpt->base.block);
  66
  67    for (level = 0; level <= pt->last_level; level++) {
  68       pt->width[level] = width;
  69       pt->height[level] = height;
  70       pt->depth[level] = depth;
  71       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  72       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  73       lpt->stride[level] = align(pt->nblocksx[level]*pt->block.size, 16);
  74
  75       lpt->level_offset[level] = buffer_size;
  76
  77       buffer_size += (pt->nblocksy[level] *
  78                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  79                       lpt->stride[level]);
  80
  81       width  = minify(width);
  82       height = minify(height);
  83       depth = minify(depth);
  84    }
  85
  86    lpt->data = align_malloc(buffer_size, 16);
  87
  88    return lpt->data != NULL;
  89 }
  90
  91 static boolean
  92 llvmpipe_displaytarget_layout(struct llvmpipe_screen *screen,
  93                               struct llvmpipe_texture * lpt)
  94 {
  95    struct llvmpipe_winsys *winsys = screen->winsys;
  96
  97    pf_get_block(lpt->base.format, &lpt->base.block);
  98    lpt->base.nblocksx[0] = pf_get_nblocksx(&lpt->base.block, lpt->base.width[0]);
  99    lpt->base.nblocksy[0] = pf_get_nblocksy(&lpt->base.block, lpt->base.height[0]);
 100
 101    lpt->dt = winsys->displaytarget_create(winsys,
 102                                           lpt->base.format,
 103                                           lpt->base.width[0],
 104                                           lpt->base.height[0],
 105                                           16,
 106                                           &lpt->stride[0] );
 107
 108    return lpt->dt != NULL;
 109 }
 110
 111
 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->depth[0] != 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->base.nblocksx[0] = pf_get_nblocksx(&lpt->base.block, lpt->base.width[0]);
 178    lpt->base.nblocksy[0] = pf_get_nblocksy(&lpt->base.block, lpt->base.height[0]);
 179    lpt->stride[0] = stride[0];
 180
 181    pipe_buffer_reference(&lpt->buffer, buffer);
 182
 183    return &lpt->base;
 184 #else
 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       struct llvmpipe_winsys *winsys = screen->winsys;
 198       winsys->displaytarget_destroy(winsys, lpt->dt);
 199    }
 200    else
 201       align_free(lpt->data);
 202
 203    FREE(lpt);
 204 }
 205
 206
 207 static struct pipe_surface *
 208 llvmpipe_get_tex_surface(struct pipe_screen *screen,
 209                          struct pipe_texture *pt,
 210                          unsigned face, unsigned level, unsigned zslice,
 211                          unsigned usage)
 212 {
 213    struct llvmpipe_texture *lpt = llvmpipe_texture(pt);
 214    struct pipe_surface *ps;
 215
 216    assert(level <= pt->last_level);
 217
 218    ps = CALLOC_STRUCT(pipe_surface);
 219    if (ps) {
 220       pipe_reference_init(&ps->reference, 1);
 221       pipe_texture_reference(&ps->texture, pt);
 222       ps->format = pt->format;
 223       ps->width = pt->width[level];
 224       ps->height = pt->height[level];
 225       ps->offset = lpt->level_offset[level];
 226       ps->usage = usage;
 227
 228       /* Because we are llvmpipe, anything that the state tracker
 229        * thought was going to be done with the GPU will actually get
 230        * done with the CPU.  Let's adjust the flags to take that into
 231        * account.
 232        */
 233       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 234          /* GPU_WRITE means "render" and that can involve reads (blending) */
 235          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 236       }
 237
 238       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 239          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 240
 241       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 242                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 243          /* Mark the surface as dirty. */
 244          lpt->timestamp++;
 245          llvmpipe_screen(screen)->timestamp++;
 246       }
 247
 248       ps->face = face;
 249       ps->level = level;
 250       ps->zslice = zslice;
 251
 252       if (pt->target == PIPE_TEXTURE_CUBE) {
 253          ps->offset += face * pt->nblocksy[level] * lpt->stride[level];
 254       }
 255       else if (pt->target == PIPE_TEXTURE_3D) {
 256          ps->offset += zslice * pt->nblocksy[level] * lpt->stride[level];
 257       }
 258       else {
 259          assert(face == 0);
 260          assert(zslice == 0);
 261       }
 262    }
 263    return ps;
 264 }
 265
 266
 267 static void
 268 llvmpipe_tex_surface_destroy(struct pipe_surface *surf)
 269 {
 270    /* Effectively do the texture_update work here - if texture images
 271     * needed post-processing to put them into hardware layout, this is
 272     * where it would happen.  For llvmpipe, nothing to do.
 273     */
 274    assert(surf->texture);
 275    pipe_texture_reference(&surf->texture, NULL);
 276    FREE(surf);
 277 }
 278
 279
 280 static struct pipe_transfer *
 281 llvmpipe_get_tex_transfer(struct pipe_screen *screen,
 282                           struct pipe_texture *texture,
 283                           unsigned face, unsigned level, unsigned zslice,
 284                           enum pipe_transfer_usage usage,
 285                           unsigned x, unsigned y, unsigned w, unsigned h)
 286 {
 287    struct llvmpipe_texture *lptex = llvmpipe_texture(texture);
 288    struct llvmpipe_transfer *lpt;
 289
 290    assert(texture);
 291    assert(level <= texture->last_level);
 292
 293    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 294    if (lpt) {
 295       struct pipe_transfer *pt = &lpt->base;
 296       pipe_texture_reference(&pt->texture, texture);
 297       pt->format = texture->format;
 298       pt->block = texture->block;
 299       pt->x = x;
 300       pt->y = y;
 301       pt->width = w;
 302       pt->height = h;
 303       pt->nblocksx = texture->nblocksx[level];
 304       pt->nblocksy = texture->nblocksy[level];
 305       pt->stride = lptex->stride[level];
 306       pt->usage = usage;
 307       pt->face = face;
 308       pt->level = level;
 309       pt->zslice = zslice;
 310
 311       lpt->offset = lptex->level_offset[level];
 312
 313       if (texture->target == PIPE_TEXTURE_CUBE) {
 314          lpt->offset += face * pt->nblocksy * pt->stride;
 315       }
 316       else if (texture->target == PIPE_TEXTURE_3D) {
 317          lpt->offset += zslice * pt->nblocksy * pt->stride;
 318       }
 319       else {
 320          assert(face == 0);
 321          assert(zslice == 0);
 322       }
 323       return pt;
 324    }
 325    return NULL;
 326 }
 327
 328
 329 static void
 330 llvmpipe_tex_transfer_destroy(struct pipe_transfer *transfer)
 331 {
 332    /* Effectively do the texture_update work here - if texture images
 333     * needed post-processing to put them into hardware layout, this is
 334     * where it would happen.  For llvmpipe, nothing to do.
 335     */
 336    assert (transfer->texture);
 337    pipe_texture_reference(&transfer->texture, NULL);
 338    FREE(transfer);
 339 }
 340
 341
 342 static void *
 343 llvmpipe_transfer_map( struct pipe_screen *_screen,
 344                        struct pipe_transfer *transfer )
 345 {
 346    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 347    ubyte *map, *xfer_map;
 348    struct llvmpipe_texture *lpt;
 349
 350    assert(transfer->texture);
 351    lpt = llvmpipe_texture(transfer->texture);
 352
 353    if(lpt->dt) {
 354       struct llvmpipe_winsys *winsys = screen->winsys;
 355
 356       map = winsys->displaytarget_map(winsys, lpt->dt,
 357                                       pipe_transfer_buffer_flags(transfer));
 358       if (map == NULL)
 359          return NULL;
 360    }
 361    else
 362       map = lpt->data;
 363
 364    /* May want to different things here depending on read/write nature
 365     * of the map:
 366     */
 367    if (transfer->texture && (transfer->usage & PIPE_TRANSFER_WRITE))
 368    {
 369       /* Do something to notify sharing contexts of a texture change.
 370        */
 371       screen->timestamp++;
 372    }
 373
 374    xfer_map = map + llvmpipe_transfer(transfer)->offset +
 375       transfer->y / transfer->block.height * transfer->stride +
 376       transfer->x / transfer->block.width * transfer->block.size;
 377    /*printf("map = %p  xfer map = %p\n", map, xfer_map);*/
 378    return xfer_map;
 379 }
 380
 381
 382 static void
 383 llvmpipe_transfer_unmap(struct pipe_screen *_screen,
 384                        struct pipe_transfer *transfer)
 385 {
 386    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 387    struct llvmpipe_texture *lpt;
 388
 389    assert(transfer->texture);
 390    lpt = llvmpipe_texture(transfer->texture);
 391
 392    if(lpt->dt) {
 393       struct llvmpipe_winsys *winsys = screen->winsys;
 394       winsys->displaytarget_unmap(winsys, lpt->dt);
 395    }
 396 }
 397
 398
 399 void
 400 llvmpipe_init_texture_funcs(struct llvmpipe_context *lp)
 401 {
 402 }
 403
 404
 405 void
 406 llvmpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 407 {
 408    screen->texture_create = llvmpipe_texture_create;
 409    screen->texture_blanket = llvmpipe_texture_blanket;
 410    screen->texture_destroy = llvmpipe_texture_destroy;
 411
 412    screen->get_tex_surface = llvmpipe_get_tex_surface;
 413    screen->tex_surface_destroy = llvmpipe_tex_surface_destroy;
 414
 415    screen->get_tex_transfer = llvmpipe_get_tex_transfer;
 416    screen->tex_transfer_destroy = llvmpipe_tex_transfer_destroy;
 417    screen->transfer_map = llvmpipe_transfer_map;
 418    screen->transfer_unmap = llvmpipe_transfer_unmap;
 419 }