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_memory.h"
33#include "util/u_inlines.h"
34#include "util/u_format.h"
35
36#include "draw/draw_context.h"
37
38#include "sp_context.h"
39#include "sp_state.h"
40#include "sp_texture.h"
41#include "sp_tex_sample.h"
42#include "sp_tex_tile_cache.h"
43#include "sp_screen.h"
44#include "state_tracker/sw_winsys.h"
45
46
47/**
48 * Bind a range [start, start+num-1] of samplers for a shader stage.
49 */
50static void
51softpipe_bind_sampler_states(struct pipe_context *pipe,
52                             enum pipe_shader_type shader,
53                             unsigned start,
54                             unsigned num,
55                             void **samplers)
56{
57   struct softpipe_context *softpipe = softpipe_context(pipe);
58   unsigned i;
59
60   assert(shader < PIPE_SHADER_TYPES);
61   assert(start + num <= ARRAY_SIZE(softpipe->samplers[shader]));
62
63   draw_flush(softpipe->draw);
64
65   /* set the new samplers */
66   for (i = 0; i < num; i++) {
67      softpipe->samplers[shader][start + i] = samplers[i];
68   }
69
70   /* find highest non-null samplers[] entry */
71   {
72      unsigned j = MAX2(softpipe->num_samplers[shader], start + num);
73      while (j > 0 && softpipe->samplers[shader][j - 1] == NULL)
74         j--;
75      softpipe->num_samplers[shader] = j;
76   }
77
78   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
79      draw_set_samplers(softpipe->draw,
80                        shader,
81                        softpipe->samplers[shader],
82                        softpipe->num_samplers[shader]);
83   }
84
85   softpipe->dirty |= SP_NEW_SAMPLER;
86}
87
88
89static void
90softpipe_sampler_view_destroy(struct pipe_context *pipe,
91                              struct pipe_sampler_view *view)
92{
93   pipe_resource_reference(&view->texture, NULL);
94   FREE(view);
95}
96
97
98void
99softpipe_set_sampler_views(struct pipe_context *pipe,
100                           enum pipe_shader_type shader,
101                           unsigned start,
102                           unsigned num,
103                           struct pipe_sampler_view **views)
104{
105   struct softpipe_context *softpipe = softpipe_context(pipe);
106   uint i;
107
108   assert(shader < PIPE_SHADER_TYPES);
109   assert(start + num <= ARRAY_SIZE(softpipe->sampler_views[shader]));
110
111   draw_flush(softpipe->draw);
112
113   /* set the new sampler views */
114   for (i = 0; i < num; i++) {
115      struct sp_sampler_view *sp_sviewsrc;
116      struct sp_sampler_view *sp_sviewdst =
117         &softpipe->tgsi.sampler[shader]->sp_sview[start + i];
118      struct pipe_sampler_view **pview = &softpipe->sampler_views[shader][start + i];
119      pipe_sampler_view_reference(pview, views[i]);
120      sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[shader][start + i],
121                                         views[i]);
122      /*
123       * We don't really have variants, however some bits are different per shader,
124       * so just copy?
125       */
126      sp_sviewsrc = (struct sp_sampler_view *)*pview;
127      if (sp_sviewsrc) {
128         memcpy(sp_sviewdst, sp_sviewsrc, sizeof(*sp_sviewsrc));
129         sp_sviewdst->compute_lambda = softpipe_get_lambda_func(&sp_sviewdst->base, shader);
130         sp_sviewdst->compute_lambda_from_grad = softpipe_get_lambda_from_grad_func(&sp_sviewdst->base, shader);
131         sp_sviewdst->cache = softpipe->tex_cache[shader][start + i];
132      }
133      else {
134         memset(sp_sviewdst, 0,  sizeof(*sp_sviewsrc));
135      }
136   }
137
138
139   /* find highest non-null sampler_views[] entry */
140   {
141      unsigned j = MAX2(softpipe->num_sampler_views[shader], start + num);
142      while (j > 0 && softpipe->sampler_views[shader][j - 1] == NULL)
143         j--;
144      softpipe->num_sampler_views[shader] = j;
145   }
146
147   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
148      draw_set_sampler_views(softpipe->draw,
149                             shader,
150                             softpipe->sampler_views[shader],
151                             softpipe->num_sampler_views[shader]);
152   }
153
154   softpipe->dirty |= SP_NEW_TEXTURE;
155}
156
157
158static void
159softpipe_delete_sampler_state(struct pipe_context *pipe,
160                              void *sampler)
161{
162   FREE( sampler );
163}
164
165
166static void
167prepare_shader_sampling(
168   struct softpipe_context *sp,
169   unsigned num,
170   struct pipe_sampler_view **views,
171   enum pipe_shader_type shader_type,
172   struct pipe_resource *mapped_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS])
173{
174
175   unsigned i;
176   uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
177   uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
178   uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
179   const void *addr;
180
181   assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
182   if (!num)
183      return;
184
185   for (i = 0; i < num; i++) {
186      struct pipe_sampler_view *view = views[i];
187
188      if (view) {
189         struct pipe_resource *tex = view->texture;
190         struct softpipe_resource *sp_tex = softpipe_resource(tex);
191         unsigned width0 = tex->width0;
192         unsigned num_layers = tex->depth0;
193         unsigned first_level = 0;
194         unsigned last_level = 0;
195
196         /* We're referencing the texture's internal data, so save a
197          * reference to it.
198          */
199         pipe_resource_reference(&mapped_tex[i], tex);
200
201         if (!sp_tex->dt) {
202            /* regular texture - setup array of mipmap level offsets */
203            MAYBE_UNUSED struct pipe_resource *res = view->texture;
204            int j;
205
206            if (view->target != PIPE_BUFFER) {
207               first_level = view->u.tex.first_level;
208               last_level = view->u.tex.last_level;
209               assert(first_level <= last_level);
210               assert(last_level <= res->last_level);
211               addr = sp_tex->data;
212
213               for (j = first_level; j <= last_level; j++) {
214                  mip_offsets[j] = sp_tex->level_offset[j];
215                  row_stride[j] = sp_tex->stride[j];
216                  img_stride[j] = sp_tex->img_stride[j];
217               }
218               if (tex->target == PIPE_TEXTURE_1D_ARRAY ||
219                   tex->target == PIPE_TEXTURE_2D_ARRAY ||
220                   tex->target == PIPE_TEXTURE_CUBE ||
221                   tex->target == PIPE_TEXTURE_CUBE_ARRAY) {
222                  num_layers = view->u.tex.last_layer - view->u.tex.first_layer + 1;
223                  for (j = first_level; j <= last_level; j++) {
224                     mip_offsets[j] += view->u.tex.first_layer *
225                                       sp_tex->img_stride[j];
226                  }
227                  if (view->target == PIPE_TEXTURE_CUBE ||
228                      view->target == PIPE_TEXTURE_CUBE_ARRAY) {
229                     assert(num_layers % 6 == 0);
230                  }
231                  assert(view->u.tex.first_layer <= view->u.tex.last_layer);
232                  assert(view->u.tex.last_layer < res->array_size);
233               }
234            }
235            else {
236               unsigned view_blocksize = util_format_get_blocksize(view->format);
237               addr = sp_tex->data;
238               /* probably don't really need to fill that out */
239               mip_offsets[0] = 0;
240               row_stride[0] = 0;
241               img_stride[0] = 0;
242
243               /* everything specified in number of elements here. */
244               width0 = view->u.buf.size / view_blocksize;
245               addr = (uint8_t *)addr + view->u.buf.offset;
246               assert(view->u.buf.offset + view->u.buf.size <= res->width0);
247            }
248         }
249         else {
250            /* display target texture/surface */
251            /*
252             * XXX: Where should this be unmapped?
253             */
254            struct softpipe_screen *screen = softpipe_screen(tex->screen);
255            struct sw_winsys *winsys = screen->winsys;
256            addr = winsys->displaytarget_map(winsys, sp_tex->dt,
257                                             PIPE_TRANSFER_READ);
258            row_stride[0] = sp_tex->stride[0];
259            img_stride[0] = sp_tex->img_stride[0];
260            mip_offsets[0] = 0;
261            assert(addr);
262         }
263         draw_set_mapped_texture(sp->draw,
264                                 shader_type,
265                                 i,
266                                 width0, tex->height0, num_layers,
267                                 first_level, last_level,
268                                 addr,
269                                 row_stride, img_stride, mip_offsets);
270      }
271   }
272}
273
274
275/**
276 * Called during state validation when SP_NEW_TEXTURE is set.
277 */
278void
279softpipe_prepare_vertex_sampling(struct softpipe_context *sp,
280                                 unsigned num,
281                                 struct pipe_sampler_view **views)
282{
283   prepare_shader_sampling(sp, num, views, PIPE_SHADER_VERTEX,
284                           sp->mapped_vs_tex);
285}
286
287void
288softpipe_cleanup_vertex_sampling(struct softpipe_context *ctx)
289{
290   unsigned i;
291   for (i = 0; i < ARRAY_SIZE(ctx->mapped_vs_tex); i++) {
292      pipe_resource_reference(&ctx->mapped_vs_tex[i], NULL);
293   }
294}
295
296
297/**
298 * Called during state validation when SP_NEW_TEXTURE is set.
299 */
300void
301softpipe_prepare_geometry_sampling(struct softpipe_context *sp,
302                                   unsigned num,
303                                   struct pipe_sampler_view **views)
304{
305   prepare_shader_sampling(sp, num, views, PIPE_SHADER_GEOMETRY,
306                           sp->mapped_gs_tex);
307}
308
309void
310softpipe_cleanup_geometry_sampling(struct softpipe_context *ctx)
311{
312   unsigned i;
313   for (i = 0; i < ARRAY_SIZE(ctx->mapped_gs_tex); i++) {
314      pipe_resource_reference(&ctx->mapped_gs_tex[i], NULL);
315   }
316}
317
318
319void
320softpipe_init_sampler_funcs(struct pipe_context *pipe)
321{
322   pipe->create_sampler_state = softpipe_create_sampler_state;
323   pipe->bind_sampler_states = softpipe_bind_sampler_states;
324   pipe->delete_sampler_state = softpipe_delete_sampler_state;
325
326   pipe->create_sampler_view = softpipe_create_sampler_view;
327   pipe->set_sampler_views = softpipe_set_sampler_views;
328   pipe->sampler_view_destroy = softpipe_sampler_view_destroy;
329}
330
331