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_screen.h"
  38 #include "svga_context.h"
  39 #include "svga_resource_texture.h"
  40 #include "svga_sampler_view.h"
  41 #include "svga_debug.h"
  42 #include "svga_surface.h"
  43
  44
  45 void
  46 svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv)
  47 {
  48    char res[128];
  49    debug_describe_resource(res, sv->texture);
  50    util_sprintf(buf, "svga_sampler_view<%s,[%u,%u]>", res, sv->min_lod, sv->max_lod);
  51 }
  52
  53 struct svga_sampler_view *
  54 svga_get_tex_sampler_view(struct pipe_context *pipe,
  55                           struct pipe_resource *pt,
  56                           unsigned min_lod, unsigned max_lod)
  57 {
  58    struct svga_context *svga = svga_context(pipe);
  59    struct svga_screen *ss = svga_screen(pipe->screen);
  60    struct svga_texture *tex = svga_texture(pt);
  61    struct svga_sampler_view *sv = NULL;
  62    SVGA3dSurfaceFlags flags = SVGA3D_SURFACE_HINT_TEXTURE;
  63    SVGA3dSurfaceFormat format = svga_translate_format(ss, pt->format);
  64    boolean view = TRUE;
  65
  66    assert(pt);
  67    assert(min_lod >= 0);
  68    assert(min_lod <= max_lod);
  69    assert(max_lod <= pt->last_level);
  70
  71
  72    /* Is a view needed */
  73    {
  74       /*
  75        * Can't control max lod. For first level views and when we only
  76        * look at one level we disable mip filtering to achive the same
  77        * results as a view.
  78        */
  79       if (min_lod == 0 && max_lod >= pt->last_level)
  80          view = FALSE;
  81
  82       if (ss->debug.no_sampler_view)
  83          view = FALSE;
  84
  85       if (ss->debug.force_sampler_view)
  86          view = TRUE;
  87    }
  88
  89    /* First try the cache */
  90    if (view) {
  91       pipe_mutex_lock(ss->tex_mutex);
  92       if (tex->cached_view &&
  93           tex->cached_view->min_lod == min_lod &&
  94           tex->cached_view->max_lod == max_lod) {
  95          svga_sampler_view_reference(&sv, tex->cached_view);
  96          pipe_mutex_unlock(ss->tex_mutex);
  97          SVGA_DBG(DEBUG_VIEWS, "svga: Sampler view: reuse %p, %u %u, last %u\n",
  98                               pt, min_lod, max_lod, pt->last_level);
  99          svga_validate_sampler_view(svga_context(pipe), sv);
 100          return sv;
 101       }
 102       pipe_mutex_unlock(ss->tex_mutex);
 103    }
 104
 105    sv = CALLOC_STRUCT(svga_sampler_view);
 106    pipe_reference_init(&sv->reference, 1);
 107    pipe_resource_reference(&sv->texture, pt);
 108    sv->min_lod = min_lod;
 109    sv->max_lod = max_lod;
 110
 111    /* No view needed just use the whole texture */
 112    if (!view) {
 113       SVGA_DBG(DEBUG_VIEWS,
 114                "svga: Sampler view: no %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 115                pt, min_lod, max_lod,
 116                max_lod - min_lod + 1,
 117                pt->width0,
 118                pt->height0,
 119                pt->depth0,
 120                pt->last_level);
 121       sv->key.cachable = 0;
 122       sv->handle = tex->handle;
 123       debug_reference(&sv->reference,
 124                       (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
 125       return sv;
 126    }
 127
 128    SVGA_DBG(DEBUG_VIEWS,
 129             "svga: Sampler view: yes %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
 130             pt, min_lod, max_lod,
 131             max_lod - min_lod + 1,
 132             pt->width0,
 133             pt->height0,
 134             pt->depth0,
 135             pt->last_level);
 136
 137    sv->age = tex->age;
 138    sv->handle = svga_texture_view_surface(svga, tex, flags, format,
 139                                           min_lod,
 140                                           max_lod - min_lod + 1,
 141                                           -1, -1,
 142                                           &sv->key);
 143
 144    if (!sv->handle) {
 145       assert(0);
 146       sv->key.cachable = 0;
 147       sv->handle = tex->handle;
 148       debug_reference(&sv->reference,
 149                       (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
 150       return sv;
 151    }
 152
 153    pipe_mutex_lock(ss->tex_mutex);
 154    svga_sampler_view_reference(&tex->cached_view, sv);
 155    pipe_mutex_unlock(ss->tex_mutex);
 156
 157    debug_reference(&sv->reference,
 158                    (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
 159
 160    return sv;
 161 }
 162
 163 void
 164 svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v)
 165 {
 166    struct svga_texture *tex = svga_texture(v->texture);
 167    unsigned numFaces;
 168    unsigned age = 0;
 169    int i, k;
 170
 171    assert(svga);
 172
 173    if (v->handle == tex->handle)
 174       return;
 175
 176    age = tex->age;
 177
 178    if(tex->b.b.target == PIPE_TEXTURE_CUBE)
 179       numFaces = 6;
 180    else
 181       numFaces = 1;
 182
 183    for (i = v->min_lod; i <= v->max_lod; i++) {
 184       for (k = 0; k < numFaces; k++) {
 185          if (v->age < tex->view_age[i])
 186             svga_texture_copy_handle(svga,
 187                                      tex->handle, 0, 0, 0, i, k,
 188                                      v->handle, 0, 0, 0, i - v->min_lod, k,
 189                                      u_minify(tex->b.b.width0, i),
 190                                      u_minify(tex->b.b.height0, i),
 191                                      u_minify(tex->b.b.depth0, i));
 192       }
 193    }
 194
 195    v->age = age;
 196 }
 197
 198 void
 199 svga_destroy_sampler_view_priv(struct svga_sampler_view *v)
 200 {
 201    struct svga_texture *tex = svga_texture(v->texture);
 202
 203    if(v->handle != tex->handle) {
 204       struct svga_screen *ss = svga_screen(v->texture->screen);
 205       SVGA_DBG(DEBUG_DMA, "unref sid %p (sampler view)\n", v->handle);
 206       svga_screen_surface_destroy(ss, &v->key, &v->handle);
 207    }
 208    pipe_resource_reference(&v->texture, NULL);
 209    FREE(v);
 210 }