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    sprintf(buf, "svga_sampler_view<%s,[%u,%u]>",
  52                 res, sv->min_lod, sv->max_lod);
  53 }
  54
  55
  56 struct svga_sampler_view *
  57 svga_get_tex_sampler_view(struct pipe_context *pipe,
  58                           struct pipe_resource *pt,
  59                           unsigned min_lod, unsigned max_lod)
  60 {
  61    struct svga_context *svga = svga_context(pipe);
  62    struct svga_screen *ss = svga_screen(pipe->screen);
  63    struct svga_texture *tex = svga_texture(pt);
  64    struct svga_sampler_view *sv = NULL;
  65    SVGA3dSurface1Flags flags = SVGA3D_SURFACE_HINT_TEXTURE;
  66    SVGA3dSurfaceFormat format = svga_translate_format(ss, pt->format,
  67                                                       PIPE_BIND_SAMPLER_VIEW);
  68    boolean view = TRUE;
  69
  70    assert(pt);
  71    assert(min_lod <= max_lod);
  72    assert(max_lod <= pt->last_level);
  73    assert(!svga_have_vgpu10(svga));
  74
  75    /* Is a view needed */
  76    {
  77       /*
  78        * Can't control max lod. For first level views and when we only
  79        * look at one level we disable mip filtering to achive the same
  80        * results as a view.
  81        */
  82       if (min_lod == 0 && max_lod >= pt->last_level)
  83          view = FALSE;
  84
  85       if (ss->debug.no_sampler_view)
  86          view = FALSE;
  87
  88       if (ss->debug.force_sampler_view)
  89          view = TRUE;
  90    }
  91
  92    /* First try the cache */
  93    if (view) {
  94       mtx_lock(&ss->tex_mutex);
  95       if (tex->cached_view &&
  96           tex->cached_view->min_lod == min_lod &&
  97           tex->cached_view->max_lod == max_lod) {
  98          svga_sampler_view_reference(&sv, tex->cached_view);
  99          mtx_unlock(&ss->tex_mutex);
 100          SVGA_DBG(DEBUG_VIEWS, "svga: Sampler view: reuse %p, %u %u, last %u\n",
 101                               pt, min_lod, max_lod, pt->last_level);
 102          svga_validate_sampler_view(svga_context(pipe), sv);
 103          return sv;
 104       }
 105       mtx_unlock(&ss->tex_mutex);
 106    }
 107
 108    sv = CALLOC_STRUCT(svga_sampler_view);
 109    if (!sv)
 110       return NULL;
 111
 112    pipe_reference_init(&sv->reference, 1);
 113
 114    /* Note: we're not refcounting the texture resource here to avoid
 115     * a circular dependency.
 116     */
 117    sv->texture = pt;
 118
 119    sv->min_lod = min_lod;
 120    sv->max_lod = max_lod;
 121
 122    /* No view needed just use the whole texture */
 123    if (!view) {
 124       SVGA_DBG(DEBUG_VIEWS,
 125                "svga: Sampler view: no %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 126                pt, min_lod, max_lod,
 127                max_lod - min_lod + 1,
 128                pt->width0,
 129                pt->height0,
 130                pt->depth0,
 131                pt->last_level);
 132       sv->key.cachable = 0;
 133       sv->handle = tex->handle;
 134       debug_reference(&sv->reference,
 135                       (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
 136       return sv;
 137    }
 138
 139    SVGA_DBG(DEBUG_VIEWS,
 140             "svga: Sampler view: yes %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 141             pt, min_lod, max_lod,
 142             max_lod - min_lod + 1,
 143             pt->width0,
 144             pt->height0,
 145             pt->depth0,
 146             pt->last_level);
 147
 148    sv->age = tex->age;
 149    sv->handle = svga_texture_view_surface(svga, tex,
 150                                           PIPE_BIND_SAMPLER_VIEW,
 151                                           flags, format,
 152                                           min_lod,
 153                                           max_lod - min_lod + 1,
 154                                           -1, 1, -1, FALSE,
 155                                           &sv->key);
 156
 157    if (!sv->handle) {
 158       sv->key.cachable = 0;
 159       sv->handle = tex->handle;
 160       debug_reference(&sv->reference,
 161                       (debug_reference_descriptor)
 162                       svga_debug_describe_sampler_view, 0);
 163       return sv;
 164    }
 165
 166    mtx_lock(&ss->tex_mutex);
 167    svga_sampler_view_reference(&tex->cached_view, sv);
 168    mtx_unlock(&ss->tex_mutex);
 169
 170    debug_reference(&sv->reference,
 171                    (debug_reference_descriptor)
 172                    svga_debug_describe_sampler_view, 0);
 173
 174    return sv;
 175 }
 176
 177
 178 void
 179 svga_validate_sampler_view(struct svga_context *svga,
 180                            struct svga_sampler_view *v)
 181 {
 182    struct svga_texture *tex = svga_texture(v->texture);
 183    unsigned numFaces;
 184    unsigned age = 0;
 185    int i;
 186    unsigned k;
 187
 188    assert(svga);
 189    assert(!svga_have_vgpu10(svga));
 190
 191    if (v->handle == tex->handle)
 192       return;
 193
 194    age = tex->age;
 195
 196    if (tex->b.b.target == PIPE_TEXTURE_CUBE)
 197       numFaces = 6;
 198    else
 199       numFaces = 1;
 200
 201    for (i = v->min_lod; i <= v->max_lod; i++) {
 202       for (k = 0; k < numFaces; k++) {
 203          assert(i < ARRAY_SIZE(tex->view_age));
 204          if (v->age < tex->view_age[i])
 205             svga_texture_copy_handle(svga,
 206                                      tex->handle, 0, 0, 0, i, k,
 207                                      v->handle, 0, 0, 0, i - v->min_lod, k,
 208                                      u_minify(tex->b.b.width0, i),
 209                                      u_minify(tex->b.b.height0, i),
 210                                      u_minify(tex->b.b.depth0, i));
 211       }
 212    }
 213
 214    v->age = age;
 215 }
 216
 217
 218 void
 219 svga_destroy_sampler_view_priv(struct svga_sampler_view *v)
 220 {
 221    struct svga_texture *tex = svga_texture(v->texture);
 222
 223    if (v->handle != tex->handle) {
 224       struct svga_screen *ss = svga_screen(v->texture->screen);
 225       SVGA_DBG(DEBUG_DMA, "unref sid %p (sampler view)\n", v->handle);
 226       svga_screen_surface_destroy(ss, &v->key, &v->handle);
 227    }
 228
 229    /* Note: we're not refcounting the texture resource here to avoid
 230     * a circular dependency.
 231     */
 232    v->texture = NULL;
 233
 234    FREE(v);
 235 }