summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/softpipe/sp_texture.c
blob: 7af839819348f9c7bbb9d97cb3c18e9bcb2501c3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
/**************************************************************************
 * 
 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/
 /*
  * Authors:
  *   Keith Whitwell <keith@tungstengraphics.com>
  *   Michel Dänzer <michel@tungstengraphics.com>
  */

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_inlines.h"
#include "pipe/internal/p_winsys_screen.h"
#include "util/u_math.h"
#include "util/u_memory.h"

#include "sp_context.h"
#include "sp_state.h"
#include "sp_texture.h"
#include "sp_tile_cache.h"
#include "sp_screen.h"


/* Simple, maximally packed layout.
 */

static unsigned minify( unsigned d )
{
   return MAX2(1, d>>1);
}


/* Conventional allocation path for non-display textures:
 */
static boolean
softpipe_texture_layout(struct pipe_screen *screen,
                        struct softpipe_texture * spt)
{
   struct pipe_winsys *ws = screen->winsys;
   struct pipe_texture *pt = &spt->base;
   unsigned level;
   unsigned width = pt->width[0];
   unsigned height = pt->height[0];
   unsigned depth = pt->depth[0];

   unsigned buffer_size = 0;

   for (level = 0; level <= pt->last_level; level++) {
      pt->width[level] = width;
      pt->height[level] = height;
      pt->depth[level] = depth;
      pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);  
      pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);  
      spt->stride[level] = pt->nblocksx[level]*pt->block.size;

      spt->level_offset[level] = buffer_size;

      buffer_size += (pt->nblocksy[level] *
                      ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
                      spt->stride[level]);

      width  = minify(width);
      height = minify(height);
      depth = minify(depth);
   }

   spt->buffer = ws->buffer_create(ws, 32,
                                   PIPE_BUFFER_USAGE_PIXEL,
                                   buffer_size);

   return spt->buffer != NULL;
}

static boolean
softpipe_displaytarget_layout(struct pipe_screen *screen,
                              struct softpipe_texture * spt)
{
   struct pipe_winsys *ws = screen->winsys;
   unsigned usage = (PIPE_BUFFER_USAGE_CPU_READ_WRITE |
                     PIPE_BUFFER_USAGE_GPU_READ_WRITE);

   spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);  
   spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);  

   spt->buffer = ws->surface_buffer_create( ws, 
                                            spt->base.width[0], 
                                            spt->base.height[0],
                                            spt->base.format,
                                            usage,
                                            &spt->stride[0]);

   return spt->buffer != NULL;
}





static struct pipe_texture *
softpipe_texture_create(struct pipe_screen *screen,
                        const struct pipe_texture *templat)
{
   struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
   if (!spt)
      return NULL;

   spt->base = *templat;
   spt->base.refcount = 1;
   spt->base.screen = screen;

   if (spt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
      if (!softpipe_displaytarget_layout(screen, spt))
         goto fail;
   }
   else {
      if (!softpipe_texture_layout(screen, spt))
         goto fail;
   }
    
   assert(spt->base.refcount == 1);
   return &spt->base;

 fail:
   FREE(spt);
   return NULL;
}


static struct pipe_texture *
softpipe_texture_blanket(struct pipe_screen * screen,
                         const struct pipe_texture *base,
                         const unsigned *stride,
                         struct pipe_buffer *buffer)
{
   struct softpipe_texture *spt;
   assert(screen);

   /* Only supports one type */
   if (base->target != PIPE_TEXTURE_2D ||
       base->last_level != 0 ||
       base->depth[0] != 1) {
      return NULL;
   }

   spt = CALLOC_STRUCT(softpipe_texture);
   if (!spt)
      return NULL;

   spt->base = *base;
   spt->base.refcount = 1;
   spt->base.screen = screen;
   spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);  
   spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);  
   spt->stride[0] = stride[0];

   pipe_buffer_reference(screen, &spt->buffer, buffer);

   return &spt->base;
}


static void
softpipe_texture_release(struct pipe_screen *screen,
                         struct pipe_texture **pt)
{
   if (!*pt)
      return;

   if (--(*pt)->refcount <= 0) {
      struct softpipe_texture *spt = softpipe_texture(*pt);

      pipe_buffer_reference(screen, &spt->buffer, NULL);
      FREE(spt);
   }
   *pt = NULL;
}


static struct pipe_surface *
softpipe_get_tex_surface(struct pipe_screen *screen,
                         struct pipe_texture *pt,
                         unsigned face, unsigned level, unsigned zslice,
                         unsigned usage)
{
   struct softpipe_texture *spt = softpipe_texture(pt);
   struct pipe_surface *ps;

   assert(level <= pt->last_level);

   ps = CALLOC_STRUCT(pipe_surface);
   if (ps) {
      ps->refcount = 1;
      pipe_texture_reference(&ps->texture, pt);
      ps->format = pt->format;
      ps->block = pt->block;
      ps->width = pt->width[level];
      ps->height = pt->height[level];
      ps->nblocksx = pt->nblocksx[level];
      ps->nblocksy = pt->nblocksy[level];
      ps->stride = spt->stride[level];
      ps->offset = spt->level_offset[level];
      ps->usage = usage;

      /* Because we are softpipe, anything that the state tracker
       * thought was going to be done with the GPU will actually get
       * done with the CPU.  Let's adjust the flags to take that into
       * account.
       */
      if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
         /* GPU_WRITE means "render" and that can involve reads (blending) */
         ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
      }

      if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
         ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;

      if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
                       PIPE_BUFFER_USAGE_GPU_WRITE)) {
         /* Mark the surface as dirty.  The tile cache will look for this. */
         spt->modified = TRUE;
      }

      ps->face = face;
      ps->level = level;
      ps->zslice = zslice;

      if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
         ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
            ps->nblocksy *
            ps->stride;
      }
      else {
         assert(face == 0);
         assert(zslice == 0);
      }
   }
   return ps;
}


static void 
softpipe_tex_surface_release(struct pipe_screen *screen, 
                             struct pipe_surface **s)
{
   struct pipe_surface *surf = *s;
   /* Effectively do the texture_update work here - if texture images
    * needed post-processing to put them into hardware layout, this is
    * where it would happen.  For softpipe, nothing to do.
    */
   assert ((*s)->texture);
   if (--surf->refcount == 0) {
      pipe_texture_reference(&surf->texture, NULL);
      FREE(surf);
   }
   *s = NULL;
}


static void *
softpipe_surface_map( struct pipe_screen *screen,
                      struct pipe_surface *surface,
                      unsigned flags )
{
   ubyte *map;
   struct softpipe_texture *spt;

   if (flags & ~surface->usage) {
      assert(0);
      return NULL;
   }

   assert(surface->texture);
   spt = softpipe_texture(surface->texture);
   map = pipe_buffer_map(screen, spt->buffer, flags);
   if (map == NULL)
      return NULL;

   /* May want to different things here depending on read/write nature
    * of the map:
    */
   if (surface->texture &&
       (flags & PIPE_BUFFER_USAGE_CPU_WRITE)) 
   {
      /* Do something to notify sharing contexts of a texture change.
       * In softpipe, that would mean flushing the texture cache.
       */
      softpipe_screen(screen)->timestamp++;
   }
   
   return map + surface->offset;
}


static void
softpipe_surface_unmap(struct pipe_screen *screen,
                       struct pipe_surface *surface)
{
   struct softpipe_texture *spt;

   assert(surface->texture);
   spt = softpipe_texture(surface->texture);

   pipe_buffer_unmap( screen, spt->buffer );
}


void
softpipe_init_texture_funcs(struct softpipe_context *sp)
{
}


void
softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
{
   screen->texture_create = softpipe_texture_create;
   screen->texture_blanket = softpipe_texture_blanket;
   screen->texture_release = softpipe_texture_release;

   screen->get_tex_surface = softpipe_get_tex_surface;
   screen->tex_surface_release = softpipe_tex_surface_release;

   screen->surface_map = softpipe_surface_map;
   screen->surface_unmap = softpipe_surface_unmap;
}