src/gallium/drivers/cell/ppu/cell_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   *   Brian Paul
  32   */
  33
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_defines.h"
  36 #include "util/u_inlines.h"
  37
  38 #include "util/u_format.h"
  39 #include "util/u_math.h"
  40 #include "util/u_memory.h"
  41
  42 #include "cell_context.h"
  43 #include "cell_state.h"
  44 #include "cell_texture.h"
  45
  46 #include "state_tracker/sw_winsys.h"
  47
  48
  49
  50 static boolean
  51 cell_texture_layout(struct pipe_screen *screen,
  52                     struct cell_texture *ct)
  53 {
  54    struct pipe_texture *pt = &ct->base;
  55    unsigned level;
  56    unsigned width = pt->width0;
  57    unsigned height = pt->height0;
  58    unsigned depth = pt->depth0;
  59
  60    ct->buffer_size = 0;
  61
  62    for (level = 0; level <= pt->last_level; level++) {
  63       unsigned size;
  64       unsigned w_tile, h_tile;
  65
  66       assert(level < CELL_MAX_TEXTURE_LEVELS);
  67
  68       /* width, height, rounded up to tile size */
  69       w_tile = align(width, TILE_SIZE);
  70       h_tile = align(height, TILE_SIZE);
  71
  72       ct->stride[level] = util_format_get_stride(pt->format, w_tile);
  73
  74       ct->level_offset[level] = ct->buffer_size;
  75
  76       size = ct->stride[level] * util_format_get_nblocksy(pt->format, h_tile);
  77       if (pt->target == PIPE_TEXTURE_CUBE)
  78          size *= 6;
  79       else
  80          size *= depth;
  81
  82       ct->buffer_size += size;
  83
  84       width = u_minify(width, 1);
  85       height = u_minify(height, 1);
  86       depth = u_minify(depth, 1);
  87    }
  88
  89    ct->data = align_malloc(ct->buffer_size, 16);
  90
  91    return ct->data != NULL;
  92 }
  93
  94
  95 /**
  96  * Texture layout for simple color buffers.
  97  */
  98 static boolean
  99 cell_displaytarget_layout(struct pipe_screen *screen,
 100                           struct cell_texture * ct)
 101 {
 102    struct sw_winsys *winsys = cell_screen(screen)->winsys;
 103
 104    /* Round up the surface size to a multiple of the tile size?
 105     */
 106    ct->dt = winsys->displaytarget_create(winsys,
 107                                           ct->base.format,
 108                                           ct->base.width0,
 109                                           ct->base.height0,
 110                                           16,
 111                                           &ct->stride[0] );
 112
 113    return ct->dt != NULL;
 114 }
 115
 116 static struct pipe_texture *
 117 cell_texture_create(struct pipe_screen *screen,
 118                     const struct pipe_texture *templat)
 119 {
 120    struct cell_texture *ct = CALLOC_STRUCT(cell_texture);
 121    if (!ct)
 122       return NULL;
 123
 124    ct->base = *templat;
 125    pipe_reference_init(&ct->base.reference, 1);
 126    ct->base.screen = screen;
 127
 128    if (ct->base.tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 129                              PIPE_TEXTURE_USAGE_SCANOUT |
 130                              PIPE_TEXTURE_USAGE_SHARED)) {
 131       if (!cell_displaytarget_layout(screen, ct))
 132          goto fail;
 133    }
 134    else {
 135       if (!cell_texture_layout(screen, ct))
 136          goto fail;
 137    }
 138
 139    return &ct->base;
 140
 141 fail:
 142    FREE(ct);
 143    return NULL;
 144 }
 145
 146
 147 static void
 148 cell_texture_destroy(struct pipe_texture *pt)
 149 {
 150    struct cell_screen *screen = cell_screen(pt->screen);
 151    struct sw_winsys *winsys = screen->winsys;
 152    struct cell_texture *ct = cell_texture(pt);
 153
 154    if (ct->mapped) {
 155       if (ct->dt)
 156          winsys->displaytarget_unmap(winsys, ct->dt);
 157       ct->mapped = NULL;
 158    }
 159
 160    if (ct->dt) {
 161       /* display target */
 162       winsys->displaytarget_destroy(winsys, ct->dt);
 163    }
 164    else {
 165       /* regular texture */
 166       align_free(ct->data);
 167    }
 168
 169    FREE(ct);
 170 }
 171
 172
 173
 174 /**
 175  * Convert image from linear layout to tiled layout.  4-byte pixels.
 176  */
 177 static void
 178 twiddle_image_uint(uint w, uint h, uint tile_size, uint *dst,
 179                    uint src_stride, const uint *src)
 180 {
 181    const uint tile_size2 = tile_size * tile_size;
 182    const uint h_t = (h + tile_size - 1) / tile_size;
 183    const uint w_t = (w + tile_size - 1) / tile_size;
 184
 185    uint it, jt;  /* tile counters */
 186    uint i, j;    /* intra-tile counters */
 187
 188    src_stride /= 4; /* convert from bytes to pixels */
 189
 190    /* loop over dest tiles */
 191    for (it = 0; it < h_t; it++) {
 192       for (jt = 0; jt < w_t; jt++) {
 193          /* start of dest tile: */
 194          uint *tdst = dst + (it * w_t + jt) * tile_size2;
 195
 196          /* compute size of this tile (may be smaller than tile_size) */
 197          /* XXX note: a compiler bug was found here. That's why the code
 198           * looks as it does.
 199           */
 200          uint tile_width = w - jt * tile_size;
 201          tile_width = MIN2(tile_width, tile_size);
 202          uint tile_height = h - it * tile_size;
 203          tile_height = MIN2(tile_height, tile_size);
 204
 205          /* loop over texels in the tile */
 206          for (i = 0; i < tile_height; i++) {
 207             for (j = 0; j < tile_width; j++) {
 208                const uint srci = it * tile_size + i;
 209                const uint srcj = jt * tile_size + j;
 210                ASSERT(srci < h);
 211                ASSERT(srcj < w);
 212                tdst[i * tile_size + j] = src[srci * src_stride + srcj];
 213             }
 214          }
 215       }
 216    }
 217 }
 218
 219
 220 /**
 221  * For Cell.  Basically, rearrange the pixels/quads from this layout:
 222  *  +--+--+--+--+
 223  *  |p0|p1|p2|p3|....
 224  *  +--+--+--+--+
 225  *
 226  * to this layout:
 227  *  +--+--+
 228  *  |p0|p1|....
 229  *  +--+--+
 230  *  |p2|p3|
 231  *  +--+--+
 232  */
 233 static void
 234 twiddle_tile(const uint *tileIn, uint *tileOut)
 235 {
 236    int y, x;
 237
 238    for (y = 0; y < TILE_SIZE; y+=2) {
 239       for (x = 0; x < TILE_SIZE; x+=2) {
 240          int k = 4 * (y/2 * TILE_SIZE/2 + x/2);
 241          tileOut[y * TILE_SIZE + (x + 0)] = tileIn[k];
 242          tileOut[y * TILE_SIZE + (x + 1)] = tileIn[k+1];
 243          tileOut[(y + 1) * TILE_SIZE + (x + 0)] = tileIn[k+2];
 244          tileOut[(y + 1) * TILE_SIZE + (x + 1)] = tileIn[k+3];
 245       }
 246    }
 247 }
 248
 249
 250 /**
 251  * Convert image from tiled layout to linear layout.  4-byte pixels.
 252  */
 253 static void
 254 untwiddle_image_uint(uint w, uint h, uint tile_size, uint *dst,
 255                      uint dst_stride, const uint *src)
 256 {
 257    const uint tile_size2 = tile_size * tile_size;
 258    const uint h_t = (h + tile_size - 1) / tile_size;
 259    const uint w_t = (w + tile_size - 1) / tile_size;
 260    uint *tile_buf;
 261    uint it, jt;  /* tile counters */
 262    uint i, j;    /* intra-tile counters */
 263
 264    dst_stride /= 4; /* convert from bytes to pixels */
 265
 266    tile_buf = align_malloc(tile_size * tile_size * 4, 16);
 267
 268    /* loop over src tiles */
 269    for (it = 0; it < h_t; it++) {
 270       for (jt = 0; jt < w_t; jt++) {
 271          /* start of src tile: */
 272          const uint *tsrc = src + (it * w_t + jt) * tile_size2;
 273
 274          twiddle_tile(tsrc, tile_buf);
 275          tsrc = tile_buf;
 276
 277          /* compute size of this tile (may be smaller than tile_size) */
 278          /* XXX note: a compiler bug was found here. That's why the code
 279           * looks as it does.
 280           */
 281          uint tile_width = w - jt * tile_size;
 282          tile_width = MIN2(tile_width, tile_size);
 283          uint tile_height = h - it * tile_size;
 284          tile_height = MIN2(tile_height, tile_size);
 285
 286          /* loop over texels in the tile */
 287          for (i = 0; i < tile_height; i++) {
 288             for (j = 0; j < tile_width; j++) {
 289                uint dsti = it * tile_size + i;
 290                uint dstj = jt * tile_size + j;
 291                ASSERT(dsti < h);
 292                ASSERT(dstj < w);
 293                dst[dsti * dst_stride + dstj] = tsrc[i * tile_size + j];
 294             }
 295          }
 296       }
 297    }
 298
 299    align_free(tile_buf);
 300 }
 301
 302
 303 static struct pipe_surface *
 304 cell_get_tex_surface(struct pipe_screen *screen,
 305                      struct pipe_texture *pt,
 306                      unsigned face, unsigned level, unsigned zslice,
 307                      unsigned usage)
 308 {
 309    struct cell_texture *ct = cell_texture(pt);
 310    struct pipe_surface *ps;
 311
 312    ps = CALLOC_STRUCT(pipe_surface);
 313    if (ps) {
 314       pipe_reference_init(&ps->reference, 1);
 315       pipe_texture_reference(&ps->texture, pt);
 316       ps->format = pt->format;
 317       ps->width = u_minify(pt->width0, level);
 318       ps->height = u_minify(pt->height0, level);
 319       ps->offset = ct->level_offset[level];
 320       /* XXX may need to override usage flags (see sp_texture.c) */
 321       ps->usage = usage;
 322       ps->face = face;
 323       ps->level = level;
 324       ps->zslice = zslice;
 325
 326       if (pt->target == PIPE_TEXTURE_CUBE) {
 327          unsigned h_tile = align(ps->height, TILE_SIZE);
 328          ps->offset += face * util_format_get_nblocksy(ps->format, h_tile) * ct->stride[level];
 329       }
 330       else if (pt->target == PIPE_TEXTURE_3D) {
 331          unsigned h_tile = align(ps->height, TILE_SIZE);
 332          ps->offset += zslice * util_format_get_nblocksy(ps->format, h_tile) * ct->stride[level];
 333       }
 334       else {
 335          assert(face == 0);
 336          assert(zslice == 0);
 337       }
 338    }
 339    return ps;
 340 }
 341
 342
 343 static void
 344 cell_tex_surface_destroy(struct pipe_surface *surf)
 345 {
 346    pipe_texture_reference(&surf->texture, NULL);
 347    FREE(surf);
 348 }
 349
 350
 351 /**
 352  * Create new pipe_transfer object.
 353  * This is used by the user to put tex data into a texture (and get it
 354  * back out for glGetTexImage).
 355  */
 356 static struct pipe_transfer *
 357 cell_get_tex_transfer(struct pipe_screen *screen,
 358                       struct pipe_texture *texture,
 359                       unsigned face, unsigned level, unsigned zslice,
 360                       enum pipe_transfer_usage usage,
 361                       unsigned x, unsigned y, unsigned w, unsigned h)
 362 {
 363    struct cell_texture *ct = cell_texture(texture);
 364    struct cell_transfer *ctrans;
 365
 366    assert(texture);
 367    assert(level <= texture->last_level);
 368
 369    ctrans = CALLOC_STRUCT(cell_transfer);
 370    if (ctrans) {
 371       struct pipe_transfer *pt = &ctrans->base;
 372       pipe_texture_reference(&pt->texture, texture);
 373       pt->x = x;
 374       pt->y = y;
 375       pt->width = w;
 376       pt->height = h;
 377       pt->stride = ct->stride[level];
 378       pt->usage = usage;
 379       pt->face = face;
 380       pt->level = level;
 381       pt->zslice = zslice;
 382
 383       ctrans->offset = ct->level_offset[level];
 384
 385       if (texture->target == PIPE_TEXTURE_CUBE) {
 386          unsigned h_tile = align(u_minify(texture->height0, level), TILE_SIZE);
 387          ctrans->offset += face * util_format_get_nblocksy(texture->format, h_tile) * pt->stride;
 388       }
 389       else if (texture->target == PIPE_TEXTURE_3D) {
 390          unsigned h_tile = align(u_minify(texture->height0, level), TILE_SIZE);
 391          ctrans->offset += zslice * util_format_get_nblocksy(texture->format, h_tile) * pt->stride;
 392       }
 393       else {
 394          assert(face == 0);
 395          assert(zslice == 0);
 396       }
 397       return pt;
 398    }
 399    return NULL;
 400 }
 401
 402
 403 static void
 404 cell_tex_transfer_destroy(struct pipe_transfer *t)
 405 {
 406    struct cell_transfer *transfer = cell_transfer(t);
 407    /* Effectively do the texture_update work here - if texture images
 408     * needed post-processing to put them into hardware layout, this is
 409     * where it would happen.  For cell, nothing to do.
 410     */
 411    assert (transfer->base.texture);
 412    pipe_texture_reference(&transfer->base.texture, NULL);
 413    FREE(transfer);
 414 }
 415
 416
 417 /**
 418  * Return pointer to texture image data in linear layout.
 419  */
 420 static void *
 421 cell_transfer_map(struct pipe_screen *screen, struct pipe_transfer *transfer)
 422 {
 423    struct cell_transfer *ctrans = cell_transfer(transfer);
 424    struct pipe_texture *pt = transfer->texture;
 425    struct cell_texture *ct = cell_texture(pt);
 426    const uint level = ctrans->base.level;
 427    const uint texWidth = u_minify(pt->width0, level);
 428    const uint texHeight = u_minify(pt->height0, level);
 429    const uint stride = ct->stride[level];
 430    unsigned size;
 431
 432    assert(transfer->texture);
 433
 434    if (ct->mapped == NULL) {
 435       if (ct->dt) {
 436          struct sw_winsys *winsys = cell_screen(screen)->winsys;
 437          ct->mapped = winsys->displaytarget_map(screen, ct->dt,
 438                                                 pipe_transfer_buffer_flags(transfer));
 439       }
 440       else {
 441          ct->mapped = ct->data;
 442       }
 443    }
 444
 445    if (ct->mapped == NULL)
 446       return NULL;
 447
 448    /*
 449     * Create a buffer of ordinary memory for the linear texture.
 450     * This is the memory that the user will read/write.
 451     */
 452    size = util_format_get_stride(pt->format, align(texWidth, TILE_SIZE)) *
 453           util_format_get_nblocksy(pt->format, align(texHeight, TILE_SIZE));
 454
 455    ctrans->map = align_malloc(size, 16);
 456    if (!ctrans->map)
 457       return NULL; /* out of memory */
 458
 459    if (transfer->usage & PIPE_TRANSFER_READ) {
 460       /* need to untwiddle the texture to make a linear version */
 461       const uint bpp = util_format_get_blocksize(ct->base.format);
 462       if (bpp == 4) {
 463          const uint *src = (uint *) (ct->mapped + ctrans->offset);
 464          uint *dst = ctrans->map;
 465          untwiddle_image_uint(texWidth, texHeight, TILE_SIZE,
 466                               dst, stride, src);
 467       }
 468       else {
 469          // xxx fix
 470       }
 471    }
 472
 473    return ctrans->map;
 474 }
 475
 476
 477 /**
 478  * Called when user is done reading/writing texture data.
 479  * If new data was written, this is where we convert the linear data
 480  * to tiled data.
 481  */
 482 static void
 483 cell_transfer_unmap(struct pipe_screen *screen,
 484                     struct pipe_transfer *transfer)
 485 {
 486    struct cell_transfer *ctrans = cell_transfer(transfer);
 487    struct pipe_texture *pt = transfer->texture;
 488    struct cell_texture *ct = cell_texture(pt);
 489    const uint level = ctrans->base.level;
 490    const uint texWidth = u_minify(pt->width0, level);
 491    const uint texHeight = u_minify(pt->height0, level);
 492    const uint stride = ct->stride[level];
 493
 494    if (!ct->mapped) {
 495       assert(0);
 496       return;
 497    }
 498
 499    if (transfer->usage & PIPE_TRANSFER_WRITE) {
 500       /* The user wrote new texture data into the mapped buffer.
 501        * We need to convert the new linear data into the twiddled/tiled format.
 502        */
 503       const uint bpp = util_format_get_blocksize(ct->base.format);
 504       if (bpp == 4) {
 505          const uint *src = ctrans->map;
 506          uint *dst = (uint *) (ct->mapped + ctrans->offset);
 507          twiddle_image_uint(texWidth, texHeight, TILE_SIZE, dst, stride, src);
 508       }
 509       else {
 510          // xxx fix
 511       }
 512    }
 513
 514    if (ct->dt) {
 515       /* display target */
 516       struct sw_winsys *winsys = cell_screen(screen)->winsys;
 517       winsys->displaytarget_unmap(winsys, ct->dt);
 518    }
 519
 520    align_free(ctrans->map);
 521    ctrans->map = NULL;
 522 }
 523
 524
 525
 526
 527
 528 void
 529 cell_init_screen_texture_funcs(struct pipe_screen *screen)
 530 {
 531    screen->texture_create = cell_texture_create;
 532    screen->texture_destroy = cell_texture_destroy;
 533
 534    screen->get_tex_surface = cell_get_tex_surface;
 535    screen->tex_surface_destroy = cell_tex_surface_destroy;
 536
 537    screen->get_tex_transfer = cell_get_tex_transfer;
 538    screen->tex_transfer_destroy = cell_tex_transfer_destroy;
 539
 540    screen->transfer_map = cell_transfer_map;
 541    screen->transfer_unmap = cell_transfer_unmap;
 542 }