1/**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/* Authors:
29 *  Brian Paul
30 */
31
32#include "util/u_inlines.h"
33#include "util/u_memory.h"
34
35#include "draw/draw_context.h"
36
37#include "lp_context.h"
38#include "lp_screen.h"
39#include "lp_state.h"
40#include "lp_debug.h"
41#include "state_tracker/sw_winsys.h"
42
43
44static void *
45llvmpipe_create_sampler_state(struct pipe_context *pipe,
46                              const struct pipe_sampler_state *sampler)
47{
48   struct pipe_sampler_state *state = mem_dup(sampler, sizeof *sampler);
49
50   if (LP_PERF & PERF_NO_MIP_LINEAR) {
51      if (state->min_mip_filter == PIPE_TEX_MIPFILTER_LINEAR)
52	 state->min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
53   }
54
55   if (LP_PERF & PERF_NO_MIPMAPS)
56      state->min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
57
58   if (LP_PERF & PERF_NO_LINEAR) {
59      state->mag_img_filter = PIPE_TEX_FILTER_NEAREST;
60      state->min_img_filter = PIPE_TEX_FILTER_NEAREST;
61   }
62
63   return state;
64}
65
66
67static void
68llvmpipe_bind_sampler_states(struct pipe_context *pipe,
69                             enum pipe_shader_type shader,
70                             unsigned start,
71                             unsigned num,
72                             void **samplers)
73{
74   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
75   unsigned i;
76
77   assert(shader < PIPE_SHADER_TYPES);
78   assert(start + num <= ARRAY_SIZE(llvmpipe->samplers[shader]));
79
80   draw_flush(llvmpipe->draw);
81
82   /* set the new samplers */
83   for (i = 0; i < num; i++) {
84      llvmpipe->samplers[shader][start + i] = samplers[i];
85   }
86
87   /* find highest non-null samplers[] entry */
88   {
89      unsigned j = MAX2(llvmpipe->num_samplers[shader], start + num);
90      while (j > 0 && llvmpipe->samplers[shader][j - 1] == NULL)
91         j--;
92      llvmpipe->num_samplers[shader] = j;
93   }
94
95   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
96      draw_set_samplers(llvmpipe->draw,
97                        shader,
98                        llvmpipe->samplers[shader],
99                        llvmpipe->num_samplers[shader]);
100   }
101   else {
102      llvmpipe->dirty |= LP_NEW_SAMPLER;
103   }
104}
105
106
107static void
108llvmpipe_set_sampler_views(struct pipe_context *pipe,
109                           enum pipe_shader_type shader,
110                           unsigned start,
111                           unsigned num,
112                           struct pipe_sampler_view **views)
113{
114   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
115   uint i;
116
117   assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
118
119   assert(shader < PIPE_SHADER_TYPES);
120   assert(start + num <= ARRAY_SIZE(llvmpipe->sampler_views[shader]));
121
122   draw_flush(llvmpipe->draw);
123
124   /* set the new sampler views */
125   for (i = 0; i < num; i++) {
126      /* Note: we're using pipe_sampler_view_release() here to work around
127       * a possible crash when the old view belongs to another context that
128       * was already destroyed.
129       */
130      pipe_sampler_view_release(pipe,
131                                &llvmpipe->sampler_views[shader][start + i]);
132      /*
133       * Warn if someone tries to set a view created in a different context
134       * (which is why we need the hack above in the first place).
135       * An assert would be better but st/mesa relies on it...
136       */
137      if (views[i] && views[i]->context != pipe) {
138         debug_printf("Illegal setting of sampler_view %d created in another "
139                      "context\n", i);
140      }
141      pipe_sampler_view_reference(&llvmpipe->sampler_views[shader][start + i],
142                                  views[i]);
143   }
144
145   /* find highest non-null sampler_views[] entry */
146   {
147      unsigned j = MAX2(llvmpipe->num_sampler_views[shader], start + num);
148      while (j > 0 && llvmpipe->sampler_views[shader][j - 1] == NULL)
149         j--;
150      llvmpipe->num_sampler_views[shader] = j;
151   }
152
153   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
154      draw_set_sampler_views(llvmpipe->draw,
155                             shader,
156                             llvmpipe->sampler_views[shader],
157                             llvmpipe->num_sampler_views[shader]);
158   }
159   else {
160      llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
161   }
162}
163
164
165static struct pipe_sampler_view *
166llvmpipe_create_sampler_view(struct pipe_context *pipe,
167                            struct pipe_resource *texture,
168                            const struct pipe_sampler_view *templ)
169{
170   struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
171   /*
172    * XXX: bind flags from OpenGL state tracker are notoriously unreliable.
173    * This looks unfixable, so fix the bind flags instead when it happens.
174    */
175   if (!(texture->bind & PIPE_BIND_SAMPLER_VIEW)) {
176      debug_printf("Illegal sampler view creation without bind flag\n");
177      texture->bind |= PIPE_BIND_SAMPLER_VIEW;
178   }
179
180   if (view) {
181      *view = *templ;
182      view->reference.count = 1;
183      view->texture = NULL;
184      pipe_resource_reference(&view->texture, texture);
185      view->context = pipe;
186
187#ifdef DEBUG
188     /*
189      * This is possibly too lenient, but the primary reason is just
190      * to catch state trackers which forget to initialize this, so
191      * it only catches clearly impossible view targets.
192      */
193      if (view->target != texture->target) {
194         if (view->target == PIPE_TEXTURE_1D)
195            assert(texture->target == PIPE_TEXTURE_1D_ARRAY);
196         else if (view->target == PIPE_TEXTURE_1D_ARRAY)
197            assert(texture->target == PIPE_TEXTURE_1D);
198         else if (view->target == PIPE_TEXTURE_2D)
199            assert(texture->target == PIPE_TEXTURE_2D_ARRAY ||
200                   texture->target == PIPE_TEXTURE_CUBE ||
201                   texture->target == PIPE_TEXTURE_CUBE_ARRAY);
202         else if (view->target == PIPE_TEXTURE_2D_ARRAY)
203            assert(texture->target == PIPE_TEXTURE_2D ||
204                   texture->target == PIPE_TEXTURE_CUBE ||
205                   texture->target == PIPE_TEXTURE_CUBE_ARRAY);
206         else if (view->target == PIPE_TEXTURE_CUBE)
207            assert(texture->target == PIPE_TEXTURE_CUBE_ARRAY ||
208                   texture->target == PIPE_TEXTURE_2D_ARRAY);
209         else if (view->target == PIPE_TEXTURE_CUBE_ARRAY)
210            assert(texture->target == PIPE_TEXTURE_CUBE ||
211                   texture->target == PIPE_TEXTURE_2D_ARRAY);
212         else
213            assert(0);
214      }
215#endif
216   }
217
218   return view;
219}
220
221
222static void
223llvmpipe_sampler_view_destroy(struct pipe_context *pipe,
224                              struct pipe_sampler_view *view)
225{
226   pipe_resource_reference(&view->texture, NULL);
227   FREE(view);
228}
229
230
231static void
232llvmpipe_delete_sampler_state(struct pipe_context *pipe,
233                              void *sampler)
234{
235   FREE( sampler );
236}
237
238
239static void
240prepare_shader_sampling(
241   struct llvmpipe_context *lp,
242   unsigned num,
243   struct pipe_sampler_view **views,
244   unsigned shader_type)
245{
246
247   unsigned i;
248   uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
249   uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
250   uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
251   const void *addr;
252
253   assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
254   if (!num)
255      return;
256
257   for (i = 0; i < num; i++) {
258      struct pipe_sampler_view *view = i < num ? views[i] : NULL;
259
260      if (view) {
261         struct pipe_resource *tex = view->texture;
262         struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
263         unsigned width0 = tex->width0;
264         unsigned num_layers = tex->depth0;
265         unsigned first_level = 0;
266         unsigned last_level = 0;
267
268         if (!lp_tex->dt) {
269            /* regular texture - setup array of mipmap level offsets */
270            struct pipe_resource *res = view->texture;
271            int j;
272
273            if (llvmpipe_resource_is_texture(res)) {
274               first_level = view->u.tex.first_level;
275               last_level = view->u.tex.last_level;
276               assert(first_level <= last_level);
277               assert(last_level <= res->last_level);
278               addr = lp_tex->tex_data;
279
280               for (j = first_level; j <= last_level; j++) {
281                  mip_offsets[j] = lp_tex->mip_offsets[j];
282                  row_stride[j] = lp_tex->row_stride[j];
283                  img_stride[j] = lp_tex->img_stride[j];
284               }
285               if (tex->target == PIPE_TEXTURE_1D_ARRAY ||
286                   tex->target == PIPE_TEXTURE_2D_ARRAY ||
287                   tex->target == PIPE_TEXTURE_CUBE ||
288                   tex->target == PIPE_TEXTURE_CUBE_ARRAY) {
289                  num_layers = view->u.tex.last_layer - view->u.tex.first_layer + 1;
290                  for (j = first_level; j <= last_level; j++) {
291                     mip_offsets[j] += view->u.tex.first_layer *
292                                       lp_tex->img_stride[j];
293                  }
294                  if (view->target == PIPE_TEXTURE_CUBE ||
295                      view->target == PIPE_TEXTURE_CUBE_ARRAY) {
296                     assert(num_layers % 6 == 0);
297                  }
298                  assert(view->u.tex.first_layer <= view->u.tex.last_layer);
299                  assert(view->u.tex.last_layer < res->array_size);
300               }
301            }
302            else {
303               unsigned view_blocksize = util_format_get_blocksize(view->format);
304               addr = lp_tex->data;
305               /* probably don't really need to fill that out */
306               mip_offsets[0] = 0;
307               row_stride[0] = 0;
308               img_stride[0] = 0;
309
310               /* everything specified in number of elements here. */
311               width0 = view->u.buf.size / view_blocksize;
312               addr = (uint8_t *)addr + view->u.buf.offset;
313               assert(view->u.buf.offset + view->u.buf.size <= res->width0);
314            }
315         }
316         else {
317            /* display target texture/surface */
318            /*
319             * XXX: Where should this be unmapped?
320             */
321            struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
322            struct sw_winsys *winsys = screen->winsys;
323            addr = winsys->displaytarget_map(winsys, lp_tex->dt,
324                                                PIPE_TRANSFER_READ);
325            row_stride[0] = lp_tex->row_stride[0];
326            img_stride[0] = lp_tex->img_stride[0];
327            mip_offsets[0] = 0;
328            assert(addr);
329         }
330         draw_set_mapped_texture(lp->draw,
331                                 shader_type,
332                                 i,
333                                 width0, tex->height0, num_layers,
334                                 first_level, last_level,
335                                 addr,
336                                 row_stride, img_stride, mip_offsets);
337      }
338   }
339}
340
341
342/**
343 * Called whenever we're about to draw (no dirty flag, FIXME?).
344 */
345void
346llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp,
347                                 unsigned num,
348                                 struct pipe_sampler_view **views)
349{
350   prepare_shader_sampling(lp, num, views, PIPE_SHADER_VERTEX);
351}
352
353
354/**
355 * Called whenever we're about to draw (no dirty flag, FIXME?).
356 */
357void
358llvmpipe_prepare_geometry_sampling(struct llvmpipe_context *lp,
359                                   unsigned num,
360                                   struct pipe_sampler_view **views)
361{
362   prepare_shader_sampling(lp, num, views, PIPE_SHADER_GEOMETRY);
363}
364
365
366void
367llvmpipe_init_sampler_funcs(struct llvmpipe_context *llvmpipe)
368{
369   llvmpipe->pipe.create_sampler_state = llvmpipe_create_sampler_state;
370
371   llvmpipe->pipe.bind_sampler_states = llvmpipe_bind_sampler_states;
372   llvmpipe->pipe.create_sampler_view = llvmpipe_create_sampler_view;
373   llvmpipe->pipe.set_sampler_views = llvmpipe_set_sampler_views;
374   llvmpipe->pipe.sampler_view_destroy = llvmpipe_sampler_view_destroy;
375   llvmpipe->pipe.delete_sampler_state = llvmpipe_delete_sampler_state;
376}
377