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/format/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
46void
47svga_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
56struct svga_sampler_view *
57svga_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
178void
179svga_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.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.width0, i),
209                                     u_minify(tex->b.height0, i),
210                                     u_minify(tex->b.depth0, i));
211      }
212   }
213
214   v->age = age;
215}
216
217
218void
219svga_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,
227                                  svga_was_texture_rendered_to(tex),
228                                  &v->handle);
229   }
230
231   /* Note: we're not refcounting the texture resource here to avoid
232    * a circular dependency.
233    */
234   v->texture = NULL;
235
236   FREE(v);
237}
238