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