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