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   */
  32
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_inlines.h"
  36 #include "pipe/p_winsys.h"
  37 #include "util/u_math.h"
  38 #include "util/u_memory.h"
  39
  40 #include "cell_context.h"
  41 #include "cell_state.h"
  42 #include "cell_texture.h"
  43
  44
  45 /* Simple, maximally packed layout.
  46  */
  47
  48 static unsigned minify( unsigned d )
  49 {
  50    return MAX2(1, d>>1);
  51 }
  52
  53
  54 static void
  55 cell_texture_layout(struct cell_texture * spt)
  56 {
  57    struct pipe_texture *pt = &spt->base;
  58    unsigned level;
  59    unsigned width = pt->width[0];
  60    unsigned height = pt->height[0];
  61    unsigned depth = pt->depth[0];
  62
  63    spt->buffer_size = 0;
  64
  65    for ( level = 0 ; level <= pt->last_level ; level++ ) {
  66       pt->width[level] = width;
  67       pt->height[level] = height;
  68       pt->depth[level] = depth;
  69       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  70       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  71
  72       spt->stride[level] = pt->nblocksx[level] * pt->block.size;
  73
  74       spt->level_offset[level] = spt->buffer_size;
  75
  76       spt->buffer_size += (pt->nblocksy[level] *
  77                           ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  78                            pt->nblocksx[level] * pt->block.size);
  79
  80       width  = minify(width);
  81       height = minify(height);
  82       depth = minify(depth);
  83    }
  84 }
  85
  86
  87 static struct pipe_texture *
  88 cell_texture_create_screen(struct pipe_screen *screen,
  89                            const struct pipe_texture *templat)
  90 {
  91    struct pipe_winsys *ws = screen->winsys;
  92    struct cell_texture *spt = CALLOC_STRUCT(cell_texture);
  93    if (!spt)
  94       return NULL;
  95
  96    spt->base = *templat;
  97    spt->base.refcount = 1;
  98    spt->base.screen = screen;
  99
 100    cell_texture_layout(spt);
 101
 102    spt->buffer = ws->buffer_create(ws, 32,
 103                                    PIPE_BUFFER_USAGE_PIXEL,
 104                                    spt->buffer_size);
 105
 106    if (!spt->buffer) {
 107       FREE(spt);
 108       return NULL;
 109    }
 110
 111    return &spt->base;
 112 }
 113
 114
 115 static void
 116 cell_texture_release_screen(struct pipe_screen *screen,
 117                             struct pipe_texture **pt)
 118 {
 119    if (!*pt)
 120       return;
 121
 122    /*
 123    DBG("%s %p refcount will be %d\n",
 124        __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
 125    */
 126    if (--(*pt)->refcount <= 0) {
 127       struct cell_texture *spt = cell_texture(*pt);
 128
 129       /*
 130       DBG("%s deleting %p\n", __FUNCTION__, (void *) spt);
 131       */
 132
 133       pipe_buffer_reference(screen, &spt->buffer, NULL);
 134
 135       FREE(spt);
 136    }
 137    *pt = NULL;
 138 }
 139
 140
 141 static void
 142 cell_texture_update(struct pipe_context *pipe, struct pipe_texture *texture,
 143                     uint face, uint levelsMask)
 144 {
 145    /* XXX TO DO:  re-tile the texture data ... */
 146
 147 }
 148
 149
 150 static struct pipe_surface *
 151 cell_get_tex_surface_screen(struct pipe_screen *screen,
 152                             struct pipe_texture *pt,
 153                             unsigned face, unsigned level, unsigned zslice,
 154                             unsigned usage)
 155 {
 156    struct pipe_winsys *ws = screen->winsys;
 157    struct cell_texture *spt = cell_texture(pt);
 158    struct pipe_surface *ps;
 159
 160    ps = ws->surface_alloc(ws);
 161    if (ps) {
 162       assert(ps->refcount);
 163       assert(ps->winsys);
 164       winsys_buffer_reference(ws, &ps->buffer, spt->buffer);
 165       ps->format = pt->format;
 166       ps->block = pt->block;
 167       ps->width = pt->width[level];
 168       ps->height = pt->height[level];
 169       ps->nblocksx = pt->nblocksx[level];
 170       ps->nblocksy = pt->nblocksy[level];
 171       ps->stride = spt->stride[level];
 172       ps->offset = spt->level_offset[level];
 173       ps->usage = usage;
 174
 175       /* XXX may need to override usage flags (see sp_texture.c) */
 176
 177
 178       if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
 179          ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
 180                        ps->nblocksy *
 181                        ps->stride;
 182       } else {
 183          assert(face == 0);
 184          assert(zslice == 0);
 185       }
 186    }
 187    return ps;
 188 }
 189
 190
 191
 192 static void
 193 tile_copy_data(uint w, uint h, uint tile_size, uint *dst, const uint *src)
 194 {
 195    const uint tile_size2 = tile_size * tile_size;
 196    const uint h_t = h / tile_size, w_t = w / tile_size;
 197
 198    uint it, jt;  /* tile counters */
 199    uint i, j;    /* intra-tile counters */
 200
 201    /* loop over dest tiles */
 202    for (it = 0; it < h_t; it++) {
 203       for (jt = 0; jt < w_t; jt++) {
 204          /* start of dest tile: */
 205          uint *tdst = dst + (it * w_t + jt) * tile_size2;
 206          /* loop over texels in the tile */
 207          for (i = 0; i < tile_size; i++) {
 208             for (j = 0; j < tile_size; j++) {
 209                const uint srci = it * tile_size + i;
 210                const uint srcj = jt * tile_size + j;
 211                *tdst++ = src[srci * w + srcj];
 212             }
 213          }
 214       }
 215    }
 216 }
 217
 218
 219
 220 /**
 221  * Convert linear texture image data to tiled format for SPU usage.
 222  */
 223 static void
 224 cell_tile_texture(struct cell_context *cell,
 225                   struct cell_texture *texture)
 226 {
 227    struct pipe_screen *screen = cell->pipe.screen;
 228    uint face = 0, level = 0, zslice = 0;
 229    struct pipe_surface *surf;
 230    const uint w = texture->base.width[0], h = texture->base.height[0];
 231    const uint *src;
 232
 233    /* temporary restrictions: */
 234    assert(w >= TILE_SIZE);
 235    assert(h >= TILE_SIZE);
 236    assert(w % TILE_SIZE == 0);
 237    assert(h % TILE_SIZE == 0);
 238
 239    surf = screen->get_tex_surface(screen, &texture->base, face, level, zslice,
 240                                   PIPE_BUFFER_USAGE_CPU_WRITE);
 241    ASSERT(surf);
 242
 243    src = (const uint *) pipe_surface_map(surf, PIPE_BUFFER_USAGE_CPU_WRITE);
 244
 245    if (texture->tiled_data) {
 246       align_free(texture->tiled_data);
 247    }
 248    texture->tiled_data = align_malloc(w * h * 4, 16);
 249
 250    tile_copy_data(w, h, TILE_SIZE, texture->tiled_data, src);
 251
 252    pipe_surface_unmap(surf);
 253
 254    pipe_surface_reference(&surf, NULL);
 255 }
 256
 257
 258 void
 259 cell_update_texture_mapping(struct cell_context *cell)
 260 {
 261 #if 0
 262    uint face = 0, level = 0, zslice = 0;
 263 #endif
 264    uint i;
 265
 266    for (i = 0; i < CELL_MAX_SAMPLERS; i++) {
 267       if (cell->texture[i])
 268          cell_tile_texture(cell, cell->texture[i]);
 269    }
 270
 271 #if 0
 272    if (cell->tex_surf && cell->tex_map) {
 273       pipe_surface_unmap(cell->tex_surf);
 274       cell->tex_map = NULL;
 275    }
 276
 277    /* XXX free old surface */
 278
 279    cell->tex_surf = cell_get_tex_surface(&cell->pipe,
 280                                          &cell->texture[0]->base,
 281                                          face, level, zslice);
 282
 283    cell->tex_map = pipe_surface_map(cell->tex_surf);
 284 #endif
 285 }
 286
 287
 288 static void *
 289 cell_surface_map( struct pipe_screen *screen,
 290                   struct pipe_surface *surface,
 291                   unsigned flags )
 292 {
 293    ubyte *map;
 294
 295    if (flags & ~surface->usage) {
 296       assert(0);
 297       return NULL;
 298    }
 299
 300    map = screen->winsys->buffer_map( screen->winsys, surface->buffer, flags );
 301    if (map == NULL)
 302       return NULL;
 303
 304    /* May want to different things here depending on read/write nature
 305     * of the map:
 306     */
 307    if (surface->texture &&
 308        (flags & PIPE_BUFFER_USAGE_CPU_WRITE))
 309    {
 310       /* Do something to notify sharing contexts of a texture change.
 311        * In softpipe, that would mean flushing the texture cache.
 312        */
 313 #if 0
 314       cell_screen(screen)->timestamp++;
 315 #endif
 316    }
 317
 318    return map + surface->offset;
 319 }
 320
 321
 322 static void
 323 cell_surface_unmap(struct pipe_screen *screen,
 324                    struct pipe_surface *surface)
 325 {
 326    screen->winsys->buffer_unmap( screen->winsys, surface->buffer );
 327 }
 328
 329
 330 void
 331 cell_init_texture_functions(struct cell_context *cell)
 332 {
 333    /*cell->pipe.texture_update = cell_texture_update;*/
 334 }
 335
 336 void
 337 cell_init_screen_texture_funcs(struct pipe_screen *screen)
 338 {
 339    screen->texture_create = cell_texture_create_screen;
 340    screen->texture_release = cell_texture_release_screen;
 341    screen->get_tex_surface = cell_get_tex_surface_screen;
 342
 343    screen->surface_map = cell_surface_map;
 344    screen->surface_unmap = cell_surface_unmap;
 345 }