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 static boolean
  98 softpipe_displaytarget_layout(struct pipe_screen *screen,
  99                               struct softpipe_texture * spt)
 100 {
 101    struct pipe_winsys *ws = screen->winsys;
 102    size_t tex_size;
 103    unsigned cpp;
 104
 105    switch (spt->base.format) {
 106    case PIPE_FORMAT_R5G6B5_UNORM:
 107       cpp = 2;
 108       break;
 109    case PIPE_FORMAT_Z24S8_UNORM:
 110    case PIPE_FORMAT_A8R8G8B8_UNORM:
 111    default:
 112       cpp = 4;
 113       break;
 114    }
 115    tex_size = spt->base.width[0] * cpp * spt->base.height[0];
 116    spt->buffer = ws->buffer_create(ws, 64, PIPE_BUFFER_USAGE_PIXEL, tex_size);
 117    /* Now extract the goodies:
 118     */
 119    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 120    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 121    spt->stride[0] = spt->base.width[0] * cpp;
 122    return spt->buffer != NULL;
 123 }
 124
 125
 126
 127
 128
 129 static struct pipe_texture *
 130 softpipe_texture_create(struct pipe_screen *screen,
 131                         const struct pipe_texture *templat)
 132 {
 133    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
 134    if (!spt)
 135       return NULL;
 136
 137    spt->base = *templat;
 138    spt->base.refcount = 1;
 139    spt->base.screen = screen;
 140
 141    if (spt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 142       if (!softpipe_displaytarget_layout(screen, spt))
 143          goto fail;
 144    }
 145    else {
 146       if (!softpipe_texture_layout(screen, spt))
 147          goto fail;
 148    }
 149
 150    assert(spt->base.refcount == 1);
 151    return &spt->base;
 152
 153  fail:
 154    FREE(spt);
 155    return NULL;
 156 }
 157
 158
 159 static struct pipe_texture *
 160 softpipe_texture_blanket(struct pipe_screen * screen,
 161                          const struct pipe_texture *base,
 162                          const unsigned *stride,
 163                          struct pipe_buffer *buffer)
 164 {
 165    struct softpipe_texture *spt;
 166    assert(screen);
 167
 168    /* Only supports one type */
 169    if (base->target != PIPE_TEXTURE_2D ||
 170        base->last_level != 0 ||
 171        base->depth[0] != 1) {
 172       return NULL;
 173    }
 174
 175    spt = CALLOC_STRUCT(softpipe_texture);
 176    if (!spt)
 177       return NULL;
 178
 179    spt->base = *base;
 180    spt->base.refcount = 1;
 181    spt->base.screen = screen;
 182    spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);
 183    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);
 184    spt->stride[0] = stride[0];
 185
 186    pipe_buffer_reference(screen, &spt->buffer, buffer);
 187
 188    return &spt->base;
 189 }
 190
 191
 192 static void
 193 softpipe_texture_release(struct pipe_screen *screen,
 194                          struct pipe_texture **pt)
 195 {
 196    if (!*pt)
 197       return;
 198
 199    if (--(*pt)->refcount <= 0) {
 200       struct softpipe_texture *spt = softpipe_texture(*pt);
 201
 202       pipe_buffer_reference(screen, &spt->buffer, NULL);
 203       FREE(spt);
 204    }
 205    *pt = NULL;
 206 }
 207
 208
 209 static struct pipe_surface *
 210 softpipe_get_tex_surface(struct pipe_screen *screen,
 211                          struct pipe_texture *pt,
 212                          unsigned face, unsigned level, unsigned zslice,
 213                          unsigned usage)
 214 {
 215    struct pipe_winsys *ws = screen->winsys;
 216    struct softpipe_texture *spt = softpipe_texture(pt);
 217    struct pipe_surface *ps;
 218
 219    assert(level <= pt->last_level);
 220
 221    ps = CALLOC_STRUCT(pipe_surface);
 222    ps->refcount = 1;
 223    ps->winsys = ws;
 224    if (ps) {
 225       assert(ps->refcount);
 226       assert(ps->winsys);
 227       pipe_texture_reference(&ps->texture, pt);
 228       pipe_buffer_reference(screen, &ps->buffer, spt->buffer);
 229       ps->format = pt->format;
 230       ps->block = pt->block;
 231       ps->width = pt->width[level];
 232       ps->height = pt->height[level];
 233       ps->nblocksx = pt->nblocksx[level];
 234       ps->nblocksy = pt->nblocksy[level];
 235       ps->stride = spt->stride[level];
 236       ps->offset = spt->level_offset[level];
 237       ps->usage = usage;
 238
 239       /* Because we are softpipe, anything that the state tracker
 240        * thought was going to be done with the GPU will actually get
 241        * done with the CPU.  Let's adjust the flags to take that into
 242        * account.
 243        */
 244       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
 245          /* GPU_WRITE means "render" and that can involve reads (blending) */
 246          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
 247       }
 248
 249       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 250          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 251
 252       if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
 253                        PIPE_BUFFER_USAGE_GPU_WRITE)) {
 254          /* Mark the surface as dirty.  The tile cache will look for this. */
 255          spt->modified = TRUE;
 256       }
 257
 258       ps->face = face;
 259       ps->level = level;
 260       ps->zslice = zslice;
 261
 262       if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
 263          ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
 264             ps->nblocksy *
 265             ps->stride;
 266       }
 267       else {
 268          assert(face == 0);
 269          assert(zslice == 0);
 270       }
 271    }
 272    return ps;
 273 }
 274
 275
 276 static void
 277 softpipe_tex_surface_release(struct pipe_screen *screen,
 278                              struct pipe_surface **s)
 279 {
 280    struct pipe_surface *surf = *s;
 281    /* Effectively do the texture_update work here - if texture images
 282     * needed post-processing to put them into hardware layout, this is
 283     * where it would happen.  For softpipe, nothing to do.
 284     */
 285    assert ((*s)->texture);
 286    if (--surf->refcount == 0) {
 287       pipe_texture_reference(&surf->texture, NULL);
 288       pipe_buffer_reference(screen, &surf->buffer, NULL);
 289       FREE(surf);
 290    }
 291    *s = NULL;
 292 }
 293
 294
 295 static void *
 296 softpipe_surface_map( struct pipe_screen *screen,
 297                       struct pipe_surface *surface,
 298                       unsigned flags )
 299 {
 300    ubyte *map;
 301
 302    if (flags & ~surface->usage) {
 303       assert(0);
 304       return NULL;
 305    }
 306
 307    map = pipe_buffer_map( screen, surface->buffer, flags );
 308    if (map == NULL)
 309       return NULL;
 310
 311    /* May want to different things here depending on read/write nature
 312     * of the map:
 313     */
 314    if (surface->texture &&
 315        (flags & PIPE_BUFFER_USAGE_CPU_WRITE))
 316    {
 317       /* Do something to notify sharing contexts of a texture change.
 318        * In softpipe, that would mean flushing the texture cache.
 319        */
 320       softpipe_screen(screen)->timestamp++;
 321    }
 322
 323    return map + surface->offset;
 324 }
 325
 326
 327 static void
 328 softpipe_surface_unmap(struct pipe_screen *screen,
 329                        struct pipe_surface *surface)
 330 {
 331    pipe_buffer_unmap( screen, surface->buffer );
 332 }
 333
 334
 335 void
 336 softpipe_init_texture_funcs(struct softpipe_context *sp)
 337 {
 338 }
 339
 340
 341 void
 342 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 343 {
 344    screen->texture_create = softpipe_texture_create;
 345    screen->texture_blanket = softpipe_texture_blanket;
 346    screen->texture_release = softpipe_texture_release;
 347
 348    screen->get_tex_surface = softpipe_get_tex_surface;
 349    screen->tex_surface_release = softpipe_tex_surface_release;
 350
 351    screen->surface_map = softpipe_surface_map;
 352    screen->surface_unmap = softpipe_surface_unmap;
 353 }