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