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