src/gallium/drivers/softpipe/sp_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 "sp_context.h"
  41 #include "sp_state.h"
  42 #include "sp_texture.h"
  43 #include "sp_tile_cache.h"
  44 #include "sp_screen.h"
  45
  46
  47 /* Simple, maximally packed layout.
  48  */
  49
  50 static unsigned minify( unsigned d )
  51 {
  52    return MAX2(1, d>>1);
  53 }
  54
  55
  56 /* Conventional allocation path for non-display textures:
  57  */
  58 static boolean
  59 softpipe_texture_layout(struct pipe_screen *screen,
  60                         struct softpipe_texture * spt)
  61 {
  62    struct pipe_winsys *ws = screen->winsys;
  63    struct pipe_texture *pt = &spt->base;
  64    unsigned level;
  65    unsigned width = pt->width[0];
  66    unsigned height = pt->height[0];
  67    unsigned depth = pt->depth[0];
  68
  69    unsigned buffer_size = 0;
  70
  71    for (level = 0; level <= pt->last_level; level++) {
  72       pt->width[level] = width;
  73       pt->height[level] = height;
  74       pt->depth[level] = depth;
  75       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  76       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  77       spt->stride[level] = pt->nblocksx[level]*pt->block.size;
  78
  79       spt->level_offset[level] = buffer_size;
  80
  81       buffer_size += (pt->nblocksy[level] *
  82                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  83                       spt->stride[level]);
  84
  85       width  = minify(width);
  86       height = minify(height);
  87       depth = minify(depth);
  88    }
  89
  90    spt->buffer = ws->buffer_create(ws, 32,
  91                                    PIPE_BUFFER_USAGE_PIXEL,
  92                                    buffer_size);
  93
  94    return spt->buffer != NULL;
  95 }
  96
  97 /* Hack it up to use the old winsys->surface_alloc_storage()
  98  * method for now:
  99  */
 100 static boolean
 101 softpipe_displaytarget_layout(struct pipe_screen *screen,
 102                               struct softpipe_texture * spt)
 103 {
 104    struct pipe_winsys *ws = screen->winsys;
 105    struct pipe_surface surf;
 106    unsigned flags = (PIPE_BUFFER_USAGE_CPU_READ |
 107                      PIPE_BUFFER_USAGE_CPU_WRITE |
 108                      PIPE_BUFFER_USAGE_GPU_READ |
 109                      PIPE_BUFFER_USAGE_GPU_WRITE);
 110    int ret;
 111
 112
 113    memset(&surf, 0, sizeof(surf));
 114
 115    ret =ws->surface_alloc_storage( ws,
 116                                    &surf,
 117                                    spt->base.width[0],
 118                                    spt->base.height[0],
 119                                    spt->base.format,
 120                                    flags,
 121                                    spt->base.tex_usage);
 122    if(ret != 0)
 123       return FALSE;
 124
 125    if (!surf.buffer) {
 126       /* allocation failed */
 127       return FALSE;
 128    }
 129
 130    /* Now extract the goodies:
 131     */
 132    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 133    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 134    spt->stride[0] = surf.stride;
 135
 136    /* Transfer the reference:
 137     */
 138    spt->buffer = surf.buffer;
 139    surf.buffer = NULL;
 140
 141    return spt->buffer != NULL;
 142 }
 143
 144
 145
 146
 147
 148 static struct pipe_texture *
 149 softpipe_texture_create(struct pipe_screen *screen,
 150                         const struct pipe_texture *templat)
 151 {
 152    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
 153    if (!spt)
 154       return NULL;
 155
 156    spt->base = *templat;
 157    spt->base.refcount = 1;
 158    spt->base.screen = screen;
 159
 160    if (spt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 161       if (!softpipe_displaytarget_layout(screen, spt))
 162          goto fail;
 163    }
 164    else {
 165       if (!softpipe_texture_layout(screen, spt))
 166          goto fail;
 167    }
 168
 169    assert(spt->base.refcount == 1);
 170    return &spt->base;
 171
 172  fail:
 173    FREE(spt);
 174    return NULL;
 175 }
 176
 177
 178 static struct pipe_texture *
 179 softpipe_texture_blanket(struct pipe_screen * screen,
 180                          const struct pipe_texture *base,
 181                          const unsigned *stride,
 182                          struct pipe_buffer *buffer)
 183 {
 184    struct softpipe_texture *spt;
 185    assert(screen);
 186
 187    /* Only supports one type */
 188    if (base->target != PIPE_TEXTURE_2D ||
 189        base->last_level != 0 ||
 190        base->depth[0] != 1) {
 191       return NULL;
 192    }
 193
 194    spt = CALLOC_STRUCT(softpipe_texture);
 195    if (!spt)
 196       return NULL;
 197
 198    spt->base = *base;
 199    spt->base.refcount = 1;
 200    spt->base.screen = screen;
 201    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 202    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 203    spt->stride[0] = stride[0];
 204
 205    pipe_buffer_reference(screen, &spt->buffer, buffer);
 206
 207    return &spt->base;
 208 }
 209
 210
 211 static void
 212 softpipe_texture_release(struct pipe_screen *screen,
 213                          struct pipe_texture **pt)
 214 {
 215    if (!*pt)
 216       return;
 217
 218    if (--(*pt)->refcount <= 0) {
 219       struct softpipe_texture *spt = softpipe_texture(*pt);
 220
 221       pipe_buffer_reference(screen, &spt->buffer, NULL);
 222       FREE(spt);
 223    }
 224    *pt = NULL;
 225 }
 226
 227
 228 static struct pipe_surface *
 229 softpipe_get_tex_surface(struct pipe_screen *screen,
 230                          struct pipe_texture *pt,
 231                          unsigned face, unsigned level, unsigned zslice,
 232                          unsigned usage)
 233 {
 234    struct pipe_winsys *ws = screen->winsys;
 235    struct softpipe_texture *spt = softpipe_texture(pt);
 236    struct pipe_surface *ps;
 237
 238    assert(level <= pt->last_level);
 239
 240    ps = CALLOC_STRUCT(pipe_surface);
 241    ps->refcount = 1;
 242    if (ps) {
 243       assert(ps->refcount);
 244       pipe_texture_reference(&ps->texture, pt);
 245       pipe_buffer_reference(screen, &ps->buffer, spt->buffer);
 246       ps->format = pt->format;
 247       ps->block = pt->block;
 248       ps->width = pt->width[level];
 249       ps->height = pt->height[level];
 250       ps->nblocksx = pt->nblocksx[level];
 251       ps->nblocksy = pt->nblocksy[level];
 252       ps->stride = spt->stride[level];
 253       ps->offset = spt->level_offset[level];
 254       ps->usage = usage;
 255
 256       /* Because we are softpipe, anything that the state tracker
 257        * thought was going to be done with the GPU will actually get
 258        * done with the CPU.  Let's adjust the flags to take that into
 259        * account.
 260        */
 261       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 262          /* GPU_WRITE means "render" and that can involve reads (blending) */
 263          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 264       }
 265
 266       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 267          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 268
 269       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 270                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 271          /* Mark the surface as dirty.  The tile cache will look for this. */
 272          spt->modified = TRUE;
 273       }
 274
 275       ps->face = face;
 276       ps->level = level;
 277       ps->zslice = zslice;
 278
 279       if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
 280          ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
 281             ps->nblocksy *
 282             ps->stride;
 283       }
 284       else {
 285          assert(face == 0);
 286          assert(zslice == 0);
 287       }
 288    }
 289    return ps;
 290 }
 291
 292
 293 static void
 294 softpipe_tex_surface_release(struct pipe_screen *screen,
 295                              struct pipe_surface **s)
 296 {
 297    struct pipe_surface *surf = *s;
 298    /* Effectively do the texture_update work here - if texture images
 299     * needed post-processing to put them into hardware layout, this is
 300     * where it would happen.  For softpipe, nothing to do.
 301     */
 302    assert ((*s)->texture);
 303    if (--surf->refcount == 0) {
 304       pipe_texture_reference(&surf->texture, NULL);
 305       pipe_buffer_reference(screen, &surf->buffer, NULL);
 306       FREE(surf);
 307    }
 308    *s = NULL;
 309 }
 310
 311
 312 static void *
 313 softpipe_surface_map( struct pipe_screen *screen,
 314                       struct pipe_surface *surface,
 315                       unsigned flags )
 316 {
 317    ubyte *map;
 318
 319    if (flags & ~surface->usage) {
 320       assert(0);
 321       return NULL;
 322    }
 323
 324    map = pipe_buffer_map( screen, surface->buffer, flags );
 325    if (map == NULL)
 326       return NULL;
 327
 328    /* May want to different things here depending on read/write nature
 329     * of the map:
 330     */
 331    if (surface->texture &&
 332        (flags & PIPE_BUFFER_USAGE_CPU_WRITE))
 333    {
 334       /* Do something to notify sharing contexts of a texture change.
 335        * In softpipe, that would mean flushing the texture cache.
 336        */
 337       softpipe_screen(screen)->timestamp++;
 338    }
 339
 340    return map + surface->offset;
 341 }
 342
 343
 344 static void
 345 softpipe_surface_unmap(struct pipe_screen *screen,
 346                        struct pipe_surface *surface)
 347 {
 348    pipe_buffer_unmap( screen, surface->buffer );
 349 }
 350
 351
 352 void
 353 softpipe_init_texture_funcs(struct softpipe_context *sp)
 354 {
 355 }
 356
 357
 358 void
 359 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 360 {
 361    screen->texture_create = softpipe_texture_create;
 362    screen->texture_blanket = softpipe_texture_blanket;
 363    screen->texture_release = softpipe_texture_release;
 364
 365    screen->get_tex_surface = softpipe_get_tex_surface;
 366    screen->tex_surface_release = softpipe_tex_surface_release;
 367
 368    screen->surface_map = softpipe_surface_map;
 369    screen->surface_unmap = softpipe_surface_unmap;
 370 }