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_debug.h"
  41 #include "svga_surface.h"
  42
  43
  44 struct svga_sampler_view *
  45 svga_get_tex_sampler_view(struct pipe_context *pipe,
  46                           struct pipe_resource *pt,
  47                           unsigned min_lod, unsigned max_lod)
  48 {
  49    struct svga_screen *ss = svga_screen(pt->screen);
  50    struct svga_texture *tex = svga_texture(pt);
  51    struct svga_sampler_view *sv = NULL;
  52    SVGA3dSurfaceFlags flags = SVGA3D_SURFACE_HINT_TEXTURE;
  53    SVGA3dSurfaceFormat format = svga_translate_format(pt->format);
  54    boolean view = TRUE;
  55
  56    assert(pt);
  57    assert(min_lod >= 0);
  58    assert(min_lod <= max_lod);
  59    assert(max_lod <= pt->last_level);
  60
  61
  62    /* Is a view needed */
  63    {
  64       /*
  65        * Can't control max lod. For first level views and when we only
  66        * look at one level we disable mip filtering to achive the same
  67        * results as a view.
  68        */
  69       if (min_lod == 0 && max_lod >= pt->last_level)
  70          view = FALSE;
  71
  72       if (util_format_is_s3tc(pt->format) && view) {
  73          format = svga_translate_format_render(pt->format);
  74       }
  75
  76       if (ss->debug.no_sampler_view)
  77          view = FALSE;
  78
  79       if (ss->debug.force_sampler_view)
  80          view = TRUE;
  81    }
  82
  83    /* First try the cache */
  84    if (view) {
  85       pipe_mutex_lock(ss->tex_mutex);
  86       if (tex->cached_view &&
  87           tex->cached_view->min_lod == min_lod &&
  88           tex->cached_view->max_lod == max_lod) {
  89          svga_sampler_view_reference(&sv, tex->cached_view);
  90          pipe_mutex_unlock(ss->tex_mutex);
  91          SVGA_DBG(DEBUG_VIEWS, "svga: Sampler view: reuse %p, %u %u, last %u\n",
  92                               pt, min_lod, max_lod, pt->last_level);
  93          svga_validate_sampler_view(svga_context(pipe), sv);
  94          return sv;
  95       }
  96       pipe_mutex_unlock(ss->tex_mutex);
  97    }
  98
  99    sv = CALLOC_STRUCT(svga_sampler_view);
 100    pipe_reference_init(&sv->reference, 1);
 101    pipe_resource_reference(&sv->texture, pt);
 102    sv->min_lod = min_lod;
 103    sv->max_lod = max_lod;
 104
 105    /* No view needed just use the whole texture */
 106    if (!view) {
 107       SVGA_DBG(DEBUG_VIEWS,
 108                "svga: Sampler view: no %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 109                pt, min_lod, max_lod,
 110                max_lod - min_lod + 1,
 111                pt->width0,
 112                pt->height0,
 113                pt->depth0,
 114                pt->last_level);
 115       sv->key.cachable = 0;
 116       sv->handle = tex->handle;
 117       return sv;
 118    }
 119
 120    SVGA_DBG(DEBUG_VIEWS,
 121             "svga: Sampler view: yes %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 122             pt, min_lod, max_lod,
 123             max_lod - min_lod + 1,
 124             pt->width0,
 125             pt->height0,
 126             pt->depth0,
 127             pt->last_level);
 128
 129    sv->age = tex->age;
 130    sv->handle = svga_texture_view_surface(pipe, tex, flags, format,
 131                                           min_lod,
 132                                           max_lod - min_lod + 1,
 133                                           -1, -1,
 134                                           &sv->key);
 135
 136    if (!sv->handle) {
 137       assert(0);
 138       sv->key.cachable = 0;
 139       sv->handle = tex->handle;
 140       return sv;
 141    }
 142
 143    pipe_mutex_lock(ss->tex_mutex);
 144    svga_sampler_view_reference(&tex->cached_view, sv);
 145    pipe_mutex_unlock(ss->tex_mutex);
 146
 147    return sv;
 148 }
 149
 150 void
 151 svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v)
 152 {
 153    struct svga_texture *tex = svga_texture(v->texture);
 154    unsigned numFaces;
 155    unsigned age = 0;
 156    int i, k;
 157
 158    assert(svga);
 159
 160    if (v->handle == tex->handle)
 161       return;
 162
 163    age = tex->age;
 164
 165    if(tex->b.b.target == PIPE_TEXTURE_CUBE)
 166       numFaces = 6;
 167    else
 168       numFaces = 1;
 169
 170    for (i = v->min_lod; i <= v->max_lod; i++) {
 171       for (k = 0; k < numFaces; k++) {
 172          if (v->age < tex->view_age[i])
 173             svga_texture_copy_handle(svga,
 174                                      tex->handle, 0, 0, 0, i, k,
 175                                      v->handle, 0, 0, 0, i - v->min_lod, k,
 176                                      u_minify(tex->b.b.width0, i),
 177                                      u_minify(tex->b.b.height0, i),
 178                                      u_minify(tex->b.b.depth0, i));
 179       }
 180    }
 181
 182    v->age = age;
 183 }
 184
 185 void
 186 svga_destroy_sampler_view_priv(struct svga_sampler_view *v)
 187 {
 188    struct svga_texture *tex = svga_texture(v->texture);
 189
 190    if(v->handle != tex->handle) {
 191       struct svga_screen *ss = svga_screen(v->texture->screen);
 192       SVGA_DBG(DEBUG_DMA, "unref sid %p (sampler view)\n", v->handle);
 193       svga_screen_surface_destroy(ss, &v->key, &v->handle);
 194    }
 195    pipe_resource_reference(&v->texture, NULL);
 196    FREE(v);
 197 }