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