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