1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
18 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
19 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 *
24 */
25
26#include "util/u_inlines.h"
27#include "util/u_format.h"
28
29#include "nouveau/nv_object.xml.h"
30#include "nv30-40_3d.xml.h"
31#include "nv30_context.h"
32#include "nv30_format.h"
33
34#define NV30_3D_TEX_WRAP_S_MIRROR_REPEAT NV30_3D_TEX_WRAP_S_MIRRORED_REPEAT
35#define NV30_WRAP(n) \
36   case PIPE_TEX_WRAP_##n: ret = NV30_3D_TEX_WRAP_S_##n; break
37#define NV40_WRAP(n) \
38   case PIPE_TEX_WRAP_##n: ret = NV40_3D_TEX_WRAP_S_##n; break
39
40static INLINE unsigned
41wrap_mode(unsigned pipe)
42{
43   unsigned ret = NV30_3D_TEX_WRAP_S_REPEAT;
44
45   switch (pipe) {
46   NV30_WRAP(REPEAT);
47   NV30_WRAP(MIRROR_REPEAT);
48   NV30_WRAP(CLAMP_TO_EDGE);
49   NV30_WRAP(CLAMP_TO_BORDER);
50   NV30_WRAP(CLAMP);
51   NV40_WRAP(MIRROR_CLAMP_TO_EDGE);
52   NV40_WRAP(MIRROR_CLAMP_TO_BORDER);
53   NV40_WRAP(MIRROR_CLAMP);
54   default:
55      break;
56   }
57
58   return ret >> NV30_3D_TEX_WRAP_S__SHIFT;
59}
60
61static INLINE unsigned
62filter_mode(const struct pipe_sampler_state *cso)
63{
64   unsigned filter;
65
66   switch (cso->mag_img_filter) {
67   case PIPE_TEX_FILTER_LINEAR:
68      filter = NV30_3D_TEX_FILTER_MAG_LINEAR;
69      break;
70   default:
71      filter = NV30_3D_TEX_FILTER_MAG_NEAREST;
72      break;
73   }
74
75   switch (cso->min_img_filter) {
76   case PIPE_TEX_FILTER_LINEAR:
77      switch (cso->min_mip_filter) {
78      case PIPE_TEX_MIPFILTER_NEAREST:
79         filter |= NV30_3D_TEX_FILTER_MIN_LINEAR_MIPMAP_NEAREST;
80         break;
81      case PIPE_TEX_MIPFILTER_LINEAR:
82         filter |= NV30_3D_TEX_FILTER_MIN_LINEAR_MIPMAP_LINEAR;
83         break;
84      default:
85         filter |= NV30_3D_TEX_FILTER_MIN_LINEAR;
86         break;
87      }
88      break;
89   default:
90      switch (cso->min_mip_filter) {
91      case PIPE_TEX_MIPFILTER_NEAREST:
92         filter |= NV30_3D_TEX_FILTER_MIN_NEAREST_MIPMAP_NEAREST;
93         break;
94      case PIPE_TEX_MIPFILTER_LINEAR:
95         filter |= NV30_3D_TEX_FILTER_MIN_NEAREST_MIPMAP_LINEAR;
96         break;
97      default:
98         filter |= NV30_3D_TEX_FILTER_MIN_NEAREST;
99         break;
100      }
101      break;
102   }
103
104   return filter;
105}
106
107static INLINE unsigned
108compare_mode(const struct pipe_sampler_state *cso)
109{
110   if (cso->compare_mode != PIPE_TEX_COMPARE_R_TO_TEXTURE)
111      return 0;
112
113   switch (cso->compare_func) {
114   case PIPE_FUNC_NEVER   : return NV30_3D_TEX_WRAP_RCOMP_NEVER;
115   case PIPE_FUNC_GREATER : return NV30_3D_TEX_WRAP_RCOMP_GREATER;
116   case PIPE_FUNC_EQUAL   : return NV30_3D_TEX_WRAP_RCOMP_EQUAL;
117   case PIPE_FUNC_GEQUAL  : return NV30_3D_TEX_WRAP_RCOMP_GEQUAL;
118   case PIPE_FUNC_LESS    : return NV30_3D_TEX_WRAP_RCOMP_LESS;
119   case PIPE_FUNC_NOTEQUAL: return NV30_3D_TEX_WRAP_RCOMP_NOTEQUAL;
120   case PIPE_FUNC_LEQUAL  : return NV30_3D_TEX_WRAP_RCOMP_LEQUAL;
121   case PIPE_FUNC_ALWAYS  : return NV30_3D_TEX_WRAP_RCOMP_ALWAYS;
122   default:
123      return 0;
124   }
125}
126
127static void *
128nv30_sampler_state_create(struct pipe_context *pipe,
129                          const struct pipe_sampler_state *cso)
130{
131   struct nouveau_object *eng3d = nv30_context(pipe)->screen->eng3d;
132   struct nv30_sampler_state *so;
133   const float max_lod = 15.0 + (255.0 / 256.0);
134
135   so = MALLOC_STRUCT(nv30_sampler_state);
136   if (!so)
137      return NULL;
138
139   so->pipe  = *cso;
140   so->fmt   = 0;
141   so->wrap  = (wrap_mode(cso->wrap_s) << NV30_3D_TEX_WRAP_S__SHIFT) |
142               (wrap_mode(cso->wrap_t) << NV30_3D_TEX_WRAP_T__SHIFT) |
143               (wrap_mode(cso->wrap_r) << NV30_3D_TEX_WRAP_R__SHIFT);
144   so->en    = 0;
145   so->wrap |= compare_mode(cso);
146   so->filt  = filter_mode(cso) | 0x00002000;
147   so->bcol  = (float_to_ubyte(cso->border_color.f[3]) << 24) |
148               (float_to_ubyte(cso->border_color.f[0]) << 16) |
149               (float_to_ubyte(cso->border_color.f[1]) <<  8) |
150               (float_to_ubyte(cso->border_color.f[2]) <<  0);
151
152   if (eng3d->oclass >= NV40_3D_CLASS) {
153      unsigned aniso = cso->max_anisotropy;
154
155      if (!cso->normalized_coords)
156         so->fmt |= NV40_3D_TEX_FORMAT_RECT;
157
158      if (aniso > 1) {
159         if      (aniso >= 16) so->en |= NV40_3D_TEX_ENABLE_ANISO_16X;
160         else if (aniso >= 12) so->en |= NV40_3D_TEX_ENABLE_ANISO_12X;
161         else if (aniso >= 10) so->en |= NV40_3D_TEX_ENABLE_ANISO_10X;
162         else if (aniso >=  8) so->en |= NV40_3D_TEX_ENABLE_ANISO_8X;
163         else if (aniso >=  6) so->en |= NV40_3D_TEX_ENABLE_ANISO_6X;
164         else if (aniso >=  4) so->en |= NV40_3D_TEX_ENABLE_ANISO_4X;
165         else                  so->en |= NV40_3D_TEX_ENABLE_ANISO_2X;
166
167         so->wrap |= nv30_context(pipe)->config.aniso;
168      }
169   } else {
170      so->en |= NV30_3D_TEX_ENABLE_ENABLE;
171
172      if      (cso->max_anisotropy >= 8) so->en |= NV30_3D_TEX_ENABLE_ANISO_8X;
173      else if (cso->max_anisotropy >= 4) so->en |= NV30_3D_TEX_ENABLE_ANISO_4X;
174      else if (cso->max_anisotropy >= 2) so->en |= NV30_3D_TEX_ENABLE_ANISO_2X;
175   }
176
177   so->filt |= (int)(cso->lod_bias * 256.0) & 0x1fff;
178   so->max_lod = (int)(CLAMP(cso->max_lod, 0.0, max_lod) * 256.0);
179   so->min_lod = (int)(CLAMP(cso->min_lod, 0.0, max_lod) * 256.0);
180   return so;
181}
182
183static void
184nv30_sampler_state_delete(struct pipe_context *pipe, void *hwcso)
185{
186   FREE(hwcso);
187}
188
189static INLINE uint32_t
190swizzle(const struct nv30_texfmt *fmt, unsigned cmp, unsigned swz)
191{
192   uint32_t data = fmt->swz[swz].src << 8;
193   if (swz <= PIPE_SWIZZLE_ALPHA)
194      data |= fmt->swz[swz].cmp;
195   else
196      data |= fmt->swz[cmp].cmp;
197   return data;
198}
199
200static struct pipe_sampler_view *
201nv30_sampler_view_create(struct pipe_context *pipe, struct pipe_resource *pt,
202                         const struct pipe_sampler_view *tmpl)
203{
204   const struct nv30_texfmt *fmt = nv30_texfmt(pipe->screen, tmpl->format);
205   struct nouveau_object *eng3d = nv30_context(pipe)->screen->eng3d;
206   struct nv30_miptree *mt = nv30_miptree(pt);
207   struct nv30_sampler_view *so;
208
209   so = MALLOC_STRUCT(nv30_sampler_view);
210   if (!so)
211      return NULL;
212   so->pipe = *tmpl;
213   so->pipe.reference.count = 1;
214   so->pipe.texture = NULL;
215   so->pipe.context = pipe;
216   pipe_resource_reference(&so->pipe.texture, pt);
217
218   so->fmt = NV30_3D_TEX_FORMAT_NO_BORDER;
219   switch (pt->target) {
220   case PIPE_TEXTURE_1D:
221      so->fmt |= NV30_3D_TEX_FORMAT_DIMS_1D;
222      break;
223   case PIPE_TEXTURE_CUBE:
224      so->fmt |= NV30_3D_TEX_FORMAT_CUBIC;
225   case PIPE_TEXTURE_2D:
226   case PIPE_TEXTURE_RECT:
227      so->fmt |= NV30_3D_TEX_FORMAT_DIMS_2D;
228      break;
229   case PIPE_TEXTURE_3D:
230      so->fmt |= NV30_3D_TEX_FORMAT_DIMS_3D;
231      break;
232   default:
233      assert(0);
234      so->fmt |= NV30_3D_TEX_FORMAT_DIMS_1D;
235      break;
236   }
237
238   so->filt = fmt->filter;
239   so->wrap = fmt->wrap;
240   so->swz  = fmt->swizzle;
241   so->swz |= swizzle(fmt, 3, tmpl->swizzle_a);
242   so->swz |= swizzle(fmt, 0, tmpl->swizzle_r) << 2;
243   so->swz |= swizzle(fmt, 1, tmpl->swizzle_g) << 4;
244   so->swz |= swizzle(fmt, 2, tmpl->swizzle_b) << 6;
245
246   /* apparently, we need to ignore the t coordinate for 1D textures to
247    * fix piglit tex1d-2dborder
248    */
249   so->wrap_mask = ~0;
250   if (pt->target == PIPE_TEXTURE_1D) {
251      so->wrap_mask &= ~NV30_3D_TEX_WRAP_T__MASK;
252      so->wrap      |=  NV30_3D_TEX_WRAP_T_REPEAT;
253   }
254
255   /* yet more hardware suckage, can't filter 32-bit float formats */
256   switch (tmpl->format) {
257   case PIPE_FORMAT_R32_FLOAT:
258   case PIPE_FORMAT_R32G32B32A32_FLOAT:
259      so->filt_mask = ~(NV30_3D_TEX_FILTER_MIN__MASK |
260                        NV30_3D_TEX_FILTER_MAG__MASK);
261      so->filt     |= NV30_3D_TEX_FILTER_MIN_NEAREST |
262                      NV30_3D_TEX_FILTER_MAG_NEAREST;
263      break;
264   default:
265      so->filt_mask = ~0;
266      break;
267   }
268
269   so->npot_size0 = (pt->width0 << 16) | pt->height0;
270   if (eng3d->oclass >= NV40_3D_CLASS) {
271      so->npot_size1 = (pt->depth0 << 20) | mt->uniform_pitch;
272      if (!mt->swizzled)
273         so->fmt |= NV40_3D_TEX_FORMAT_LINEAR;
274      so->fmt |= 0x00008000;
275      so->fmt |= (pt->last_level + 1) << NV40_3D_TEX_FORMAT_MIPMAP_COUNT__SHIFT;
276   } else {
277      so->swz |= mt->uniform_pitch << NV30_3D_TEX_SWIZZLE_RECT_PITCH__SHIFT;
278      if (pt->last_level)
279         so->fmt |= NV30_3D_TEX_FORMAT_MIPMAP;
280      so->fmt |= util_logbase2(pt->width0)  << 20;
281      so->fmt |= util_logbase2(pt->height0) << 24;
282      so->fmt |= util_logbase2(pt->depth0)  << 28;
283      so->fmt |= 0x00010000;
284   }
285
286   so->base_lod = so->pipe.u.tex.first_level << 8;
287   so->high_lod = MIN2(pt->last_level, so->pipe.u.tex.last_level) << 8;
288   return &so->pipe;
289}
290
291static void
292nv30_sampler_view_destroy(struct pipe_context *pipe,
293                          struct pipe_sampler_view *view)
294{
295   pipe_resource_reference(&view->texture, NULL);
296   FREE(view);
297}
298
299void
300nv30_texture_init(struct pipe_context *pipe)
301{
302   pipe->create_sampler_state = nv30_sampler_state_create;
303   pipe->delete_sampler_state = nv30_sampler_state_delete;
304   pipe->create_sampler_view = nv30_sampler_view_create;
305   pipe->sampler_view_destroy = nv30_sampler_view_destroy;
306}
307