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      /*
127       * Warn if someone tries to set a view created in a different context
128       * (which is why we need the hack above in the first place).
129       * An assert would be better but st/mesa relies on it...
130       */
131      if (views[i] && views[i]->context != pipe) {
132         debug_printf("Illegal setting of sampler_view %d created in another "
133                      "context\n", i);
134      }
135      pipe_sampler_view_reference(&llvmpipe->sampler_views[shader][start + i],
136                                  views[i]);
137   }
138
139   /* find highest non-null sampler_views[] entry */
140   {
141      unsigned j = MAX2(llvmpipe->num_sampler_views[shader], start + num);
142      while (j > 0 && llvmpipe->sampler_views[shader][j - 1] == NULL)
143         j--;
144      llvmpipe->num_sampler_views[shader] = j;
145   }
146
147   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
148      draw_set_sampler_views(llvmpipe->draw,
149                             shader,
150                             llvmpipe->sampler_views[shader],
151                             llvmpipe->num_sampler_views[shader]);
152   }
153   else {
154      llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
155   }
156}
157
158
159static struct pipe_sampler_view *
160llvmpipe_create_sampler_view(struct pipe_context *pipe,
161                            struct pipe_resource *texture,
162                            const struct pipe_sampler_view *templ)
163{
164   struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
165   /*
166    * XXX: bind flags from OpenGL state tracker are notoriously unreliable.
167    * This looks unfixable, so fix the bind flags instead when it happens.
168    */
169   if (!(texture->bind & PIPE_BIND_SAMPLER_VIEW)) {
170      debug_printf("Illegal sampler view creation without bind flag\n");
171      texture->bind |= PIPE_BIND_SAMPLER_VIEW;
172   }
173
174   if (view) {
175      *view = *templ;
176      view->reference.count = 1;
177      view->texture = NULL;
178      pipe_resource_reference(&view->texture, texture);
179      view->context = pipe;
180
181#ifdef DEBUG
182     /*
183      * This is possibly too lenient, but the primary reason is just
184      * to catch state trackers which forget to initialize this, so
185      * it only catches clearly impossible view targets.
186      */
187      if (view->target != texture->target) {
188         if (view->target == PIPE_TEXTURE_1D)
189            assert(texture->target == PIPE_TEXTURE_1D_ARRAY);
190         else if (view->target == PIPE_TEXTURE_1D_ARRAY)
191            assert(texture->target == PIPE_TEXTURE_1D);
192         else if (view->target == PIPE_TEXTURE_2D)
193            assert(texture->target == PIPE_TEXTURE_2D_ARRAY ||
194                   texture->target == PIPE_TEXTURE_CUBE ||
195                   texture->target == PIPE_TEXTURE_CUBE_ARRAY);
196         else if (view->target == PIPE_TEXTURE_2D_ARRAY)
197            assert(texture->target == PIPE_TEXTURE_2D ||
198                   texture->target == PIPE_TEXTURE_CUBE ||
199                   texture->target == PIPE_TEXTURE_CUBE_ARRAY);
200         else if (view->target == PIPE_TEXTURE_CUBE)
201            assert(texture->target == PIPE_TEXTURE_CUBE_ARRAY ||
202                   texture->target == PIPE_TEXTURE_2D_ARRAY);
203         else if (view->target == PIPE_TEXTURE_CUBE_ARRAY)
204            assert(texture->target == PIPE_TEXTURE_CUBE ||
205                   texture->target == PIPE_TEXTURE_2D_ARRAY);
206         else
207            assert(0);
208      }
209#endif
210   }
211
212   return view;
213}
214
215
216static void
217llvmpipe_sampler_view_destroy(struct pipe_context *pipe,
218                              struct pipe_sampler_view *view)
219{
220   pipe_resource_reference(&view->texture, NULL);
221   FREE(view);
222}
223
224
225static void
226llvmpipe_delete_sampler_state(struct pipe_context *pipe,
227                              void *sampler)
228{
229   FREE( sampler );
230}
231
232
233static void
234prepare_shader_sampling(
235   struct llvmpipe_context *lp,
236   unsigned num,
237   struct pipe_sampler_view **views,
238   enum pipe_shader_type shader_type)
239{
240
241   unsigned i;
242   uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
243   uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
244   uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
245   const void *addr;
246
247   assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
248   if (!num)
249      return;
250
251   for (i = 0; i < num; i++) {
252      struct pipe_sampler_view *view = i < num ? views[i] : NULL;
253
254      if (view) {
255         struct pipe_resource *tex = view->texture;
256         struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
257         unsigned width0 = tex->width0;
258         unsigned num_layers = tex->depth0;
259         unsigned first_level = 0;
260         unsigned last_level = 0;
261
262         if (!lp_tex->dt) {
263            /* regular texture - setup array of mipmap level offsets */
264            struct pipe_resource *res = view->texture;
265            int j;
266
267            if (llvmpipe_resource_is_texture(res)) {
268               first_level = view->u.tex.first_level;
269               last_level = view->u.tex.last_level;
270               assert(first_level <= last_level);
271               assert(last_level <= res->last_level);
272               addr = lp_tex->tex_data;
273
274               for (j = first_level; j <= last_level; j++) {
275                  mip_offsets[j] = lp_tex->mip_offsets[j];
276                  row_stride[j] = lp_tex->row_stride[j];
277                  img_stride[j] = lp_tex->img_stride[j];
278               }
279               if (tex->target == PIPE_TEXTURE_1D_ARRAY ||
280                   tex->target == PIPE_TEXTURE_2D_ARRAY ||
281                   tex->target == PIPE_TEXTURE_CUBE ||
282                   tex->target == PIPE_TEXTURE_CUBE_ARRAY) {
283                  num_layers = view->u.tex.last_layer - view->u.tex.first_layer + 1;
284                  for (j = first_level; j <= last_level; j++) {
285                     mip_offsets[j] += view->u.tex.first_layer *
286                                       lp_tex->img_stride[j];
287                  }
288                  if (view->target == PIPE_TEXTURE_CUBE ||
289                      view->target == PIPE_TEXTURE_CUBE_ARRAY) {
290                     assert(num_layers % 6 == 0);
291                  }
292                  assert(view->u.tex.first_layer <= view->u.tex.last_layer);
293                  assert(view->u.tex.last_layer < res->array_size);
294               }
295            }
296            else {
297               unsigned view_blocksize = util_format_get_blocksize(view->format);
298               addr = lp_tex->data;
299               /* probably don't really need to fill that out */
300               mip_offsets[0] = 0;
301               row_stride[0] = 0;
302               img_stride[0] = 0;
303
304               /* everything specified in number of elements here. */
305               width0 = view->u.buf.size / view_blocksize;
306               addr = (uint8_t *)addr + view->u.buf.offset;
307               assert(view->u.buf.offset + view->u.buf.size <= res->width0);
308            }
309         }
310         else {
311            /* display target texture/surface */
312            /*
313             * XXX: Where should this be unmapped?
314             */
315            struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
316            struct sw_winsys *winsys = screen->winsys;
317            addr = winsys->displaytarget_map(winsys, lp_tex->dt,
318                                                PIPE_TRANSFER_READ);
319            row_stride[0] = lp_tex->row_stride[0];
320            img_stride[0] = lp_tex->img_stride[0];
321            mip_offsets[0] = 0;
322            assert(addr);
323         }
324         draw_set_mapped_texture(lp->draw,
325                                 shader_type,
326                                 i,
327                                 width0, tex->height0, num_layers,
328                                 first_level, last_level,
329                                 addr,
330                                 row_stride, img_stride, mip_offsets);
331      }
332   }
333}
334
335
336/**
337 * Called whenever we're about to draw (no dirty flag, FIXME?).
338 */
339void
340llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp,
341                                 unsigned num,
342                                 struct pipe_sampler_view **views)
343{
344   prepare_shader_sampling(lp, num, views, PIPE_SHADER_VERTEX);
345}
346
347
348/**
349 * Called whenever we're about to draw (no dirty flag, FIXME?).
350 */
351void
352llvmpipe_prepare_geometry_sampling(struct llvmpipe_context *lp,
353                                   unsigned num,
354                                   struct pipe_sampler_view **views)
355{
356   prepare_shader_sampling(lp, num, views, PIPE_SHADER_GEOMETRY);
357}
358
359
360void
361llvmpipe_init_sampler_funcs(struct llvmpipe_context *llvmpipe)
362{
363   llvmpipe->pipe.create_sampler_state = llvmpipe_create_sampler_state;
364
365   llvmpipe->pipe.bind_sampler_states = llvmpipe_bind_sampler_states;
366   llvmpipe->pipe.create_sampler_view = llvmpipe_create_sampler_view;
367   llvmpipe->pipe.set_sampler_views = llvmpipe_set_sampler_views;
368   llvmpipe->pipe.sampler_view_destroy = llvmpipe_sampler_view_destroy;
369   llvmpipe->pipe.delete_sampler_state = llvmpipe_delete_sampler_state;
370}
371