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       spt->pitch[level] = width;
  75
  76       spt->level_offset[level] = buffer_size;
  77
  78       buffer_size += (((pt->compressed) ? MAX2(1, height/4) : height) *
  79                       ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  80                       width * pt->cpp);
  81
  82       width  = minify(width);
  83       height = minify(height);
  84       depth = minify(depth);
  85    }
  86
  87    spt->buffer = ws->buffer_create(ws, 32,
  88                                    PIPE_BUFFER_USAGE_PIXEL,
  89                                    buffer_size);
  90
  91    return spt->buffer != NULL;
  92 }
  93
  94
  95
  96 /* Hack it up to use the old winsys->surface_alloc_storage()
  97  * method for now:
  98  */
  99 static boolean
 100 softpipe_displaytarget_layout(struct pipe_screen *screen,
 101                               struct softpipe_texture * spt)
 102 {
 103    struct pipe_winsys *ws = screen->winsys;
 104    struct pipe_surface surf;
 105    unsigned flags = (PIPE_BUFFER_USAGE_CPU_READ |
 106                      PIPE_BUFFER_USAGE_CPU_WRITE |
 107                      PIPE_BUFFER_USAGE_GPU_READ |
 108                      PIPE_BUFFER_USAGE_GPU_WRITE);
 109
 110
 111    memset(&surf, 0, sizeof(surf));
 112
 113    ws->surface_alloc_storage( ws,
 114                               &surf,
 115                               spt->base.width[0],
 116                               spt->base.height[0],
 117                               spt->base.format,
 118                               flags);
 119
 120    /* Now extract the goodies:
 121     */
 122    spt->buffer = surf.buffer;
 123    spt->pitch[0] = surf.pitch;
 124
 125    return spt->buffer != NULL;
 126 }
 127
 128
 129
 130
 131
 132 static struct pipe_texture *
 133 softpipe_texture_create(struct pipe_screen *screen,
 134                         const struct pipe_texture *templat)
 135 {
 136    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
 137    if (!spt)
 138       return NULL;
 139
 140    spt->base = *templat;
 141    spt->base.refcount = 1;
 142    spt->base.screen = screen;
 143
 144    if (spt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 145       if (!softpipe_displaytarget_layout(screen, spt))
 146          goto fail;
 147    }
 148    else {
 149       if (!softpipe_texture_layout(screen, spt))
 150          goto fail;
 151    }
 152
 153    assert(spt->base.refcount == 1);
 154    return &spt->base;
 155
 156  fail:
 157    FREE(spt);
 158    return NULL;
 159 }
 160
 161
 162 static void
 163 softpipe_texture_release(struct pipe_screen *screen,
 164                          struct pipe_texture **pt)
 165 {
 166    if (!*pt)
 167       return;
 168
 169    if (--(*pt)->refcount <= 0) {
 170       struct softpipe_texture *spt = softpipe_texture(*pt);
 171
 172       pipe_buffer_reference(screen->winsys, &spt->buffer, NULL);
 173       FREE(spt);
 174    }
 175    *pt = NULL;
 176 }
 177
 178
 179 static struct pipe_surface *
 180 softpipe_get_tex_surface(struct pipe_screen *screen,
 181                          struct pipe_texture *pt,
 182                          unsigned face, unsigned level, unsigned zslice,
 183                          unsigned usage)
 184 {
 185    struct pipe_winsys *ws = screen->winsys;
 186    struct softpipe_texture *spt = softpipe_texture(pt);
 187    struct pipe_surface *ps;
 188
 189    assert(level <= pt->last_level);
 190
 191    ps = ws->surface_alloc(ws);
 192    if (ps) {
 193       assert(ps->refcount);
 194       assert(ps->winsys);
 195       pipe_buffer_reference(ws, &ps->buffer, spt->buffer);
 196       ps->format = pt->format;
 197       ps->cpp = pt->cpp;
 198       ps->width = pt->width[level];
 199       ps->height = pt->height[level];
 200       ps->pitch = ps->width;
 201       ps->offset = spt->level_offset[level];
 202       ps->usage = usage;
 203
 204       /* Because we are softpipe, anything that the state tracker
 205        * thought was going to be done with the GPU will actually get
 206        * done with the CPU.  Let's adjust the flags to take that into
 207        * account.
 208        */
 209       if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE)
 210          ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE;
 211
 212       if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
 213          ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 214
 215
 216       pipe_texture_reference(&ps->texture, pt);
 217       ps->face = face;
 218       ps->level = level;
 219       ps->zslice = zslice;
 220
 221       if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
 222          ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
 223                        (pt->compressed ? ps->height/4 : ps->height) *
 224                        ps->width * ps->cpp;
 225       }
 226       else {
 227          assert(face == 0);
 228          assert(zslice == 0);
 229       }
 230    }
 231    return ps;
 232 }
 233
 234
 235 static void
 236 softpipe_tex_surface_release(struct pipe_screen *screen,
 237                              struct pipe_surface **s)
 238 {
 239    /* Effectively do the texture_update work here - if texture images
 240     * needed post-processing to put them into hardware layout, this is
 241     * where it would happen.  For softpipe, nothing to do.
 242     */
 243    assert ((*s)->texture);
 244    pipe_texture_reference(&(*s)->texture, NULL);
 245
 246    screen->winsys->surface_release(screen->winsys, s);
 247 }
 248
 249
 250 static void *
 251 softpipe_surface_map( struct pipe_screen *screen,
 252                       struct pipe_surface *surface,
 253                       unsigned flags )
 254 {
 255    ubyte *map;
 256
 257    if (flags & ~surface->usage) {
 258       assert(0);
 259       return NULL;
 260    }
 261
 262    map = screen->winsys->buffer_map( screen->winsys, surface->buffer, flags );
 263    if (map == NULL)
 264       return NULL;
 265
 266    /* May want to different things here depending on read/write nature
 267     * of the map:
 268     */
 269    if (surface->texture &&
 270        (flags & PIPE_BUFFER_USAGE_CPU_WRITE))
 271    {
 272       /* Do something to notify sharing contexts of a texture change.
 273        * In softpipe, that would mean flushing the texture cache.
 274        */
 275       softpipe_screen(screen)->timestamp++;
 276    }
 277
 278    return map + surface->offset;
 279 }
 280
 281
 282 static void
 283 softpipe_surface_unmap(struct pipe_screen *screen,
 284                        struct pipe_surface *surface)
 285 {
 286    screen->winsys->buffer_unmap( screen->winsys, surface->buffer );
 287 }
 288
 289
 290 void
 291 softpipe_init_texture_funcs(struct softpipe_context *sp)
 292 {
 293 }
 294
 295
 296 void
 297 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 298 {
 299    screen->texture_create = softpipe_texture_create;
 300    screen->texture_release = softpipe_texture_release;
 301
 302    screen->get_tex_surface = softpipe_get_tex_surface;
 303    screen->tex_surface_release = softpipe_tex_surface_release;
 304
 305    screen->surface_map = softpipe_surface_map;
 306    screen->surface_unmap = softpipe_surface_unmap;
 307 }