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_util.h"
  37 #include "pipe/p_winsys.h"
  38
  39 #include "sp_context.h"
  40 #include "sp_state.h"
  41 #include "sp_texture.h"
  42 #include "sp_tile_cache.h"
  43 #include "sp_screen.h"
  44
  45
  46 /* Simple, maximally packed layout.
  47  */
  48
  49 static unsigned minify( unsigned d )
  50 {
  51    return MAX2(1, d>>1);
  52 }
  53
  54
  55 /* Conventional allocation path for non-display textures:
  56  */
  57 static boolean
  58 softpipe_texture_layout(struct pipe_screen *screen,
  59                         struct softpipe_texture * spt)
  60 {
  61    struct pipe_winsys *ws = screen->winsys;
  62    struct pipe_texture *pt = &spt->base;
  63    unsigned level;
  64    unsigned width = pt->width[0];
  65    unsigned height = pt->height[0];
  66    unsigned depth = pt->depth[0];
  67
  68    unsigned buffer_size = 0;
  69
  70    for (level = 0; level <= pt->last_level; level++) {
  71       pt->width[level] = width;
  72       pt->height[level] = height;
  73       pt->depth[level] = depth;
  74       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);
  75       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);
  76       spt->stride[level] = pt->nblocksx[level]*pt->block.size;
  77
  78       spt->level_offset[level] = buffer_size;
  79
  80       buffer_size += (pt->nblocksy[level] *
  81                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  82                       spt->stride[level]);
  83
  84       width  = minify(width);
  85       height = minify(height);
  86       depth = minify(depth);
  87    }
  88
  89    spt->buffer = ws->buffer_create(ws, 32,
  90                                    PIPE_BUFFER_USAGE_PIXEL,
  91                                    buffer_size);
  92
  93    return spt->buffer != NULL;
  94 }
  95
  96
  97
  98 /* Hack it up to use the old winsys->surface_alloc_storage()
  99  * method for now:
 100  */
 101 static boolean
 102 softpipe_displaytarget_layout(struct pipe_screen *screen,
 103                               struct softpipe_texture * spt)
 104 {
 105    struct pipe_winsys *ws = screen->winsys;
 106    struct pipe_surface surf;
 107    unsigned flags = (PIPE_BUFFER_USAGE_CPU_READ |
 108                      PIPE_BUFFER_USAGE_CPU_WRITE |
 109                      PIPE_BUFFER_USAGE_GPU_READ |
 110                      PIPE_BUFFER_USAGE_GPU_WRITE);
 111
 112
 113    memset(&surf, 0, sizeof(surf));
 114
 115    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
 123    /* Now extract the goodies:
 124     */
 125    spt->buffer = surf.buffer;
 126    spt->stride[0] = surf.stride;
 127
 128    return spt->buffer != NULL;
 129 }
 130
 131
 132
 133
 134
 135 static struct pipe_texture *
 136 softpipe_texture_create(struct pipe_screen *screen,
 137                         const struct pipe_texture *templat)
 138 {
 139    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
 140    if (!spt)
 141       return NULL;
 142
 143    spt->base = *templat;
 144    spt->base.refcount = 1;
 145    spt->base.screen = screen;
 146
 147    if (spt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 148       if (!softpipe_displaytarget_layout(screen, spt))
 149          goto fail;
 150    }
 151    else {
 152       if (!softpipe_texture_layout(screen, spt))
 153          goto fail;
 154    }
 155
 156    assert(spt->base.refcount == 1);
 157    return &spt->base;
 158
 159  fail:
 160    FREE(spt);
 161    return NULL;
 162 }
 163
 164
 165 static void
 166 softpipe_texture_release(struct pipe_screen *screen,
 167                          struct pipe_texture **pt)
 168 {
 169    if (!*pt)
 170       return;
 171
 172    if (--(*pt)->refcount <= 0) {
 173       struct softpipe_texture *spt = softpipe_texture(*pt);
 174
 175       pipe_buffer_reference(screen->winsys, &spt->buffer, NULL);
 176       FREE(spt);
 177    }
 178    *pt = NULL;
 179 }
 180
 181
 182 static struct pipe_surface *
 183 softpipe_get_tex_surface(struct pipe_screen *screen,
 184                          struct pipe_texture *pt,
 185                          unsigned face, unsigned level, unsigned zslice,
 186                          unsigned usage)
 187 {
 188    struct pipe_winsys *ws = screen->winsys;
 189    struct softpipe_texture *spt = softpipe_texture(pt);
 190    struct pipe_surface *ps;
 191
 192    assert(level <= pt->last_level);
 193
 194    ps = ws->surface_alloc(ws);
 195    if (ps) {
 196       assert(ps->refcount);
 197       assert(ps->winsys);
 198       pipe_buffer_reference(ws, &ps->buffer, spt->buffer);
 199       ps->format = pt->format;
 200       ps->block = pt->block;
 201       ps->width = pt->width[level];
 202       ps->height = pt->height[level];
 203       ps->nblocksx = pt->nblocksx[level];
 204       ps->nblocksy = pt->nblocksy[level];
 205       ps->stride = spt->stride[level];
 206       ps->offset = spt->level_offset[level];
 207       ps->usage = usage;
 208
 209       /* Because we are softpipe, anything that the state tracker
 210        * thought was going to be done with the GPU will actually get
 211        * done with the CPU.  Let's adjust the flags to take that into
 212        * account.
 213        */
 214       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 215          /* GPU_WRITE means "render" and that can involve reads (blending) */
 216          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 217       }
 218
 219       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 220          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 221
 222       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 223                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 224          /* Mark the surface as dirty.  The tile cache will look for this. */
 225          spt->modified = TRUE;
 226       }
 227
 228       pipe_texture_reference(&ps->texture, pt);
 229       ps->face = face;
 230       ps->level = level;
 231       ps->zslice = zslice;
 232
 233       if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
 234          ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
 235                        ps->nblocksy *
 236                        ps->stride;
 237       }
 238       else {
 239          assert(face == 0);
 240          assert(zslice == 0);
 241       }
 242    }
 243    return ps;
 244 }
 245
 246
 247 static void
 248 softpipe_tex_surface_release(struct pipe_screen *screen,
 249                              struct pipe_surface **s)
 250 {
 251    /* Effectively do the texture_update work here - if texture images
 252     * needed post-processing to put them into hardware layout, this is
 253     * where it would happen.  For softpipe, nothing to do.
 254     */
 255    assert ((*s)->texture);
 256    pipe_texture_reference(&(*s)->texture, NULL);
 257
 258    screen->winsys->surface_release(screen->winsys, s);
 259 }
 260
 261
 262 static void *
 263 softpipe_surface_map( struct pipe_screen *screen,
 264                       struct pipe_surface *surface,
 265                       unsigned flags )
 266 {
 267    ubyte *map;
 268
 269    if (flags & ~surface->usage) {
 270       assert(0);
 271       return NULL;
 272    }
 273
 274    map = screen->winsys->buffer_map( screen->winsys, surface->buffer, flags );
 275    if (map == NULL)
 276       return NULL;
 277
 278    /* May want to different things here depending on read/write nature
 279     * of the map:
 280     */
 281    if (surface->texture &&
 282        (flags & PIPE_BUFFER_USAGE_CPU_WRITE))
 283    {
 284       /* Do something to notify sharing contexts of a texture change.
 285        * In softpipe, that would mean flushing the texture cache.
 286        */
 287       softpipe_screen(screen)->timestamp++;
 288    }
 289
 290    return map + surface->offset;
 291 }
 292
 293
 294 static void
 295 softpipe_surface_unmap(struct pipe_screen *screen,
 296                        struct pipe_surface *surface)
 297 {
 298    screen->winsys->buffer_unmap( screen->winsys, surface->buffer );
 299 }
 300
 301
 302 void
 303 softpipe_init_texture_funcs(struct softpipe_context *sp)
 304 {
 305 }
 306
 307
 308 void
 309 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 310 {
 311    screen->texture_create = softpipe_texture_create;
 312    screen->texture_release = softpipe_texture_release;
 313
 314    screen->get_tex_surface = softpipe_get_tex_surface;
 315    screen->tex_surface_release = softpipe_tex_surface_release;
 316
 317    screen->surface_map = softpipe_surface_map;
 318    screen->surface_unmap = softpipe_surface_unmap;
 319 }