src/gallium/drivers/svga/svga_sampler_view.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "svga_cmd.h"
  27
  28 #include "pipe/p_state.h"
  29 #include "pipe/p_defines.h"
  30 #include "util/u_inlines.h"
  31 #include "os/os_thread.h"
  32 #include "util/u_format.h"
  33 #include "util/u_math.h"
  34 #include "util/u_memory.h"
  35
  36 #include "svga_screen.h"
  37 #include "svga_context.h"
  38 #include "svga_resource_texture.h"
  39 #include "svga_sampler_view.h"
  40 #include "svga_winsys.h"
  41 #include "svga_debug.h"
  42 #include "svga_surface.h"
  43
  44 #include <util/u_string.h>
  45
  46
  47 struct svga_sampler_view *
  48 svga_get_tex_sampler_view(struct pipe_context *pipe,
  49                           struct pipe_resource *pt,
  50                           unsigned min_lod, unsigned max_lod)
  51 {
  52    struct svga_screen *ss = svga_screen(pt->screen);
  53    struct svga_texture *tex = svga_texture(pt);
  54    struct svga_sampler_view *sv = NULL;
  55    SVGA3dSurfaceFormat format = svga_translate_format(pt->format);
  56    boolean view = TRUE;
  57
  58    assert(pt);
  59    assert(min_lod >= 0);
  60    assert(min_lod <= max_lod);
  61    assert(max_lod <= pt->last_level);
  62
  63
  64    /* Is a view needed */
  65    {
  66       /*
  67        * Can't control max lod. For first level views and when we only
  68        * look at one level we disable mip filtering to achive the same
  69        * results as a view.
  70        */
  71       if (min_lod == 0 && max_lod >= pt->last_level)
  72          view = FALSE;
  73
  74       if (util_format_is_s3tc(pt->format) && view) {
  75          format = svga_translate_format_render(pt->format);
  76       }
  77
  78       if (ss->debug.no_sampler_view)
  79          view = FALSE;
  80
  81       if (ss->debug.force_sampler_view)
  82          view = TRUE;
  83    }
  84
  85    /* First try the cache */
  86    if (view) {
  87       pipe_mutex_lock(ss->tex_mutex);
  88       if (tex->cached_view &&
  89           tex->cached_view->min_lod == min_lod &&
  90           tex->cached_view->max_lod == max_lod) {
  91          svga_sampler_view_reference(&sv, tex->cached_view);
  92          pipe_mutex_unlock(ss->tex_mutex);
  93          SVGA_DBG(DEBUG_VIEWS, "svga: Sampler view: reuse %p, %u %u, last %u\n",
  94                               pt, min_lod, max_lod, pt->last_level);
  95          svga_validate_sampler_view(svga_context(pipe), sv);
  96          return sv;
  97       }
  98       pipe_mutex_unlock(ss->tex_mutex);
  99    }
 100
 101    sv = CALLOC_STRUCT(svga_sampler_view);
 102    pipe_reference_init(&sv->reference, 1);
 103    pipe_resource_reference(&sv->texture, pt);
 104    sv->min_lod = min_lod;
 105    sv->max_lod = max_lod;
 106
 107    /* No view needed just use the whole texture */
 108    if (!view) {
 109       SVGA_DBG(DEBUG_VIEWS,
 110                "svga: Sampler view: no %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 111                pt, min_lod, max_lod,
 112                max_lod - min_lod + 1,
 113                pt->width0,
 114                pt->height0,
 115                pt->depth0,
 116                pt->last_level);
 117       sv->key.cachable = 0;
 118       sv->handle = tex->handle;
 119       return sv;
 120    }
 121
 122    SVGA_DBG(DEBUG_VIEWS,
 123             "svga: Sampler view: yes %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 124             pt, min_lod, max_lod,
 125             max_lod - min_lod + 1,
 126             pt->width0,
 127             pt->height0,
 128             pt->depth0,
 129             pt->last_level);
 130
 131    sv->age = tex->age;
 132    sv->handle = svga_texture_view_surface(pipe, tex, format,
 133                                           min_lod,
 134                                           max_lod - min_lod + 1,
 135                                           -1, -1,
 136                                           &sv->key);
 137
 138    if (!sv->handle) {
 139       assert(0);
 140       sv->key.cachable = 0;
 141       sv->handle = tex->handle;
 142       return sv;
 143    }
 144
 145    pipe_mutex_lock(ss->tex_mutex);
 146    svga_sampler_view_reference(&tex->cached_view, sv);
 147    pipe_mutex_unlock(ss->tex_mutex);
 148
 149    return sv;
 150 }
 151
 152 void
 153 svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v)
 154 {
 155    struct svga_texture *tex = svga_texture(v->texture);
 156    unsigned numFaces;
 157    unsigned age = 0;
 158    int i, k;
 159
 160    assert(svga);
 161
 162    if (v->handle == tex->handle)
 163       return;
 164
 165    age = tex->age;
 166
 167    if(tex->b.b.target == PIPE_TEXTURE_CUBE)
 168       numFaces = 6;
 169    else
 170       numFaces = 1;
 171
 172    for (i = v->min_lod; i <= v->max_lod; i++) {
 173       for (k = 0; k < numFaces; k++) {
 174          if (v->age < tex->view_age[i])
 175             svga_texture_copy_handle(svga, NULL,
 176                                      tex->handle, 0, 0, 0, i, k,
 177                                      v->handle, 0, 0, 0, i - v->min_lod, k,
 178                                      u_minify(tex->b.b.width0, i),
 179                                      u_minify(tex->b.b.height0, i),
 180                                      u_minify(tex->b.b.depth0, i));
 181       }
 182    }
 183
 184    v->age = age;
 185 }
 186
 187 void
 188 svga_destroy_sampler_view_priv(struct svga_sampler_view *v)
 189 {
 190    struct svga_texture *tex = svga_texture(v->texture);
 191
 192    if(v->handle != tex->handle) {
 193       struct svga_screen *ss = svga_screen(v->texture->screen);
 194       SVGA_DBG(DEBUG_DMA, "unref sid %p (sampler view)\n", v->handle);
 195       svga_screen_surface_destroy(ss, &v->key, &v->handle);
 196    }
 197    pipe_resource_reference(&v->texture, NULL);
 198    FREE(v);
 199 }