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 #include "util/u_string.h"
  36
  37 #include "svga_format.h"
  38 #include "svga_screen.h"
  39 #include "svga_context.h"
  40 #include "svga_resource_texture.h"
  41 #include "svga_sampler_view.h"
  42 #include "svga_debug.h"
  43 #include "svga_surface.h"
  44
  45
  46 void
  47 svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv)
  48 {
  49    char res[128];
  50    debug_describe_resource(res, sv->texture);
  51    util_sprintf(buf, "svga_sampler_view<%s,[%u,%u]>", res, sv->min_lod, sv->max_lod);
  52 }
  53
  54 struct svga_sampler_view *
  55 svga_get_tex_sampler_view(struct pipe_context *pipe,
  56                           struct pipe_resource *pt,
  57                           unsigned min_lod, unsigned max_lod)
  58 {
  59    struct svga_context *svga = svga_context(pipe);
  60    struct svga_screen *ss = svga_screen(pipe->screen);
  61    struct svga_texture *tex = svga_texture(pt);
  62    struct svga_sampler_view *sv = NULL;
  63    SVGA3dSurfaceFlags flags = SVGA3D_SURFACE_HINT_TEXTURE;
  64    SVGA3dSurfaceFormat format = svga_translate_format(ss, pt->format, PIPE_BIND_SAMPLER_VIEW);
  65    boolean view = TRUE;
  66
  67    assert(pt);
  68    assert(min_lod >= 0);
  69    assert(min_lod <= max_lod);
  70    assert(max_lod <= pt->last_level);
  71
  72
  73    /* Is a view needed */
  74    {
  75       /*
  76        * Can't control max lod. For first level views and when we only
  77        * look at one level we disable mip filtering to achive the same
  78        * results as a view.
  79        */
  80       if (min_lod == 0 && max_lod >= pt->last_level)
  81          view = FALSE;
  82
  83       if (ss->debug.no_sampler_view)
  84          view = FALSE;
  85
  86       if (ss->debug.force_sampler_view)
  87          view = TRUE;
  88    }
  89
  90    /* First try the cache */
  91    if (view) {
  92       pipe_mutex_lock(ss->tex_mutex);
  93       if (tex->cached_view &&
  94           tex->cached_view->min_lod == min_lod &&
  95           tex->cached_view->max_lod == max_lod) {
  96          svga_sampler_view_reference(&sv, tex->cached_view);
  97          pipe_mutex_unlock(ss->tex_mutex);
  98          SVGA_DBG(DEBUG_VIEWS, "svga: Sampler view: reuse %p, %u %u, last %u\n",
  99                               pt, min_lod, max_lod, pt->last_level);
 100          svga_validate_sampler_view(svga_context(pipe), sv);
 101          return sv;
 102       }
 103       pipe_mutex_unlock(ss->tex_mutex);
 104    }
 105
 106    sv = CALLOC_STRUCT(svga_sampler_view);
 107    pipe_reference_init(&sv->reference, 1);
 108
 109    /* Note: we're not refcounting the texture resource here to avoid
 110     * a circular dependency.
 111     */
 112    sv->texture = pt;
 113
 114    sv->min_lod = min_lod;
 115    sv->max_lod = max_lod;
 116
 117    /* No view needed just use the whole texture */
 118    if (!view) {
 119       SVGA_DBG(DEBUG_VIEWS,
 120                "svga: Sampler view: no %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       sv->key.cachable = 0;
 128       sv->handle = tex->handle;
 129       debug_reference(&sv->reference,
 130                       (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
 131       return sv;
 132    }
 133
 134    SVGA_DBG(DEBUG_VIEWS,
 135             "svga: Sampler view: yes %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 136             pt, min_lod, max_lod,
 137             max_lod - min_lod + 1,
 138             pt->width0,
 139             pt->height0,
 140             pt->depth0,
 141             pt->last_level);
 142
 143    sv->age = tex->age;
 144    sv->handle = svga_texture_view_surface(svga, tex, flags, format,
 145                                           min_lod,
 146                                           max_lod - min_lod + 1,
 147                                           -1, -1,
 148                                           &sv->key);
 149
 150    if (!sv->handle) {
 151       assert(0);
 152       sv->key.cachable = 0;
 153       sv->handle = tex->handle;
 154       debug_reference(&sv->reference,
 155                       (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
 156       return sv;
 157    }
 158
 159    pipe_mutex_lock(ss->tex_mutex);
 160    svga_sampler_view_reference(&tex->cached_view, sv);
 161    pipe_mutex_unlock(ss->tex_mutex);
 162
 163    debug_reference(&sv->reference,
 164                    (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
 165
 166    return sv;
 167 }
 168
 169 void
 170 svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v)
 171 {
 172    struct svga_texture *tex = svga_texture(v->texture);
 173    unsigned numFaces;
 174    unsigned age = 0;
 175    int i;
 176    unsigned k;
 177
 178    assert(svga);
 179
 180    if (v->handle == tex->handle)
 181       return;
 182
 183    age = tex->age;
 184
 185    if(tex->b.b.target == PIPE_TEXTURE_CUBE)
 186       numFaces = 6;
 187    else
 188       numFaces = 1;
 189
 190    for (i = v->min_lod; i <= v->max_lod; i++) {
 191       for (k = 0; k < numFaces; k++) {
 192          if (v->age < tex->view_age[i])
 193             svga_texture_copy_handle(svga,
 194                                      tex->handle, 0, 0, 0, i, k,
 195                                      v->handle, 0, 0, 0, i - v->min_lod, k,
 196                                      u_minify(tex->b.b.width0, i),
 197                                      u_minify(tex->b.b.height0, i),
 198                                      u_minify(tex->b.b.depth0, i));
 199       }
 200    }
 201
 202    v->age = age;
 203 }
 204
 205 void
 206 svga_destroy_sampler_view_priv(struct svga_sampler_view *v)
 207 {
 208    struct svga_texture *tex = svga_texture(v->texture);
 209
 210    if(v->handle != tex->handle) {
 211       struct svga_screen *ss = svga_screen(v->texture->screen);
 212       SVGA_DBG(DEBUG_DMA, "unref sid %p (sampler view)\n", v->handle);
 213       svga_screen_surface_destroy(ss, &v->key, &v->handle);
 214    }
 215
 216    /* Note: we're not refcounting the texture resource here to avoid
 217     * a circular dependency.
 218     */
 219    v->texture = NULL;
 220
 221    FREE(v);
 222 }