1/*
2 * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 *    Rob Clark <robclark@freedesktop.org>
25 */
26
27#include "pipe/p_state.h"
28#include "util/format/u_format.h"
29#include "util/u_inlines.h"
30#include "util/u_memory.h"
31#include "util/u_string.h"
32
33#include "fd3_format.h"
34#include "fd3_texture.h"
35
36static enum a3xx_tex_clamp
37tex_clamp(unsigned wrap, bool *needs_border)
38{
39   switch (wrap) {
40   case PIPE_TEX_WRAP_REPEAT:
41      return A3XX_TEX_REPEAT;
42   case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
43      return A3XX_TEX_CLAMP_TO_EDGE;
44   case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
45      *needs_border = true;
46      return A3XX_TEX_CLAMP_TO_BORDER;
47   case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
48      /* only works for PoT.. need to emulate otherwise! */
49      return A3XX_TEX_MIRROR_CLAMP;
50   case PIPE_TEX_WRAP_MIRROR_REPEAT:
51      return A3XX_TEX_MIRROR_REPEAT;
52   case PIPE_TEX_WRAP_MIRROR_CLAMP:
53   case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
54      /* these two we could perhaps emulate, but we currently
55       * just don't advertise PIPE_CAP_TEXTURE_MIRROR_CLAMP
56       */
57   default:
58      DBG("invalid wrap: %u", wrap);
59      return 0;
60   }
61}
62
63static enum a3xx_tex_filter
64tex_filter(unsigned filter, bool aniso)
65{
66   switch (filter) {
67   case PIPE_TEX_FILTER_NEAREST:
68      return A3XX_TEX_NEAREST;
69   case PIPE_TEX_FILTER_LINEAR:
70      return aniso ? A3XX_TEX_ANISO : A3XX_TEX_LINEAR;
71   default:
72      DBG("invalid filter: %u", filter);
73      return 0;
74   }
75}
76
77static void *
78fd3_sampler_state_create(struct pipe_context *pctx,
79                         const struct pipe_sampler_state *cso)
80{
81   struct fd3_sampler_stateobj *so = CALLOC_STRUCT(fd3_sampler_stateobj);
82   unsigned aniso = util_last_bit(MIN2(cso->max_anisotropy >> 1, 8));
83   bool miplinear = false;
84
85   if (!so)
86      return NULL;
87
88   if (cso->min_mip_filter == PIPE_TEX_MIPFILTER_LINEAR)
89      miplinear = true;
90
91   so->base = *cso;
92
93   so->needs_border = false;
94   so->texsamp0 =
95      COND(!cso->normalized_coords, A3XX_TEX_SAMP_0_UNNORM_COORDS) |
96      COND(!cso->seamless_cube_map, A3XX_TEX_SAMP_0_CUBEMAPSEAMLESSFILTOFF) |
97      COND(miplinear, A3XX_TEX_SAMP_0_MIPFILTER_LINEAR) |
98      A3XX_TEX_SAMP_0_XY_MAG(tex_filter(cso->mag_img_filter, aniso)) |
99      A3XX_TEX_SAMP_0_XY_MIN(tex_filter(cso->min_img_filter, aniso)) |
100      A3XX_TEX_SAMP_0_ANISO(aniso) |
101      A3XX_TEX_SAMP_0_WRAP_S(tex_clamp(cso->wrap_s, &so->needs_border)) |
102      A3XX_TEX_SAMP_0_WRAP_T(tex_clamp(cso->wrap_t, &so->needs_border)) |
103      A3XX_TEX_SAMP_0_WRAP_R(tex_clamp(cso->wrap_r, &so->needs_border));
104
105   if (cso->compare_mode)
106      so->texsamp0 |=
107         A3XX_TEX_SAMP_0_COMPARE_FUNC(cso->compare_func); /* maps 1:1 */
108
109   so->texsamp1 = A3XX_TEX_SAMP_1_LOD_BIAS(cso->lod_bias);
110
111   if (cso->min_mip_filter != PIPE_TEX_MIPFILTER_NONE) {
112      so->texsamp1 |= A3XX_TEX_SAMP_1_MIN_LOD(cso->min_lod) |
113                      A3XX_TEX_SAMP_1_MAX_LOD(cso->max_lod);
114   } else {
115      /* If we're not doing mipmap filtering, we still need a slightly > 0
116       * LOD clamp so the HW can decide between min and mag filtering of
117       * level 0.
118       */
119      so->texsamp1 |= A3XX_TEX_SAMP_1_MIN_LOD(MIN2(cso->min_lod, 0.125f)) |
120                      A3XX_TEX_SAMP_1_MAX_LOD(MIN2(cso->max_lod, 0.125f));
121   }
122
123   return so;
124}
125
126static enum a3xx_tex_type
127tex_type(unsigned target)
128{
129   switch (target) {
130   default:
131      assert(0);
132   case PIPE_BUFFER:
133   case PIPE_TEXTURE_1D:
134   case PIPE_TEXTURE_1D_ARRAY:
135      return A3XX_TEX_1D;
136   case PIPE_TEXTURE_RECT:
137   case PIPE_TEXTURE_2D:
138   case PIPE_TEXTURE_2D_ARRAY:
139      return A3XX_TEX_2D;
140   case PIPE_TEXTURE_3D:
141      return A3XX_TEX_3D;
142   case PIPE_TEXTURE_CUBE:
143   case PIPE_TEXTURE_CUBE_ARRAY:
144      return A3XX_TEX_CUBE;
145   }
146}
147
148static struct pipe_sampler_view *
149fd3_sampler_view_create(struct pipe_context *pctx, struct pipe_resource *prsc,
150                        const struct pipe_sampler_view *cso)
151{
152   struct fd3_pipe_sampler_view *so = CALLOC_STRUCT(fd3_pipe_sampler_view);
153   struct fd_resource *rsc = fd_resource(prsc);
154   unsigned lvl;
155
156   if (!so)
157      return NULL;
158
159   so->base = *cso;
160   pipe_reference(NULL, &prsc->reference);
161   so->base.texture = prsc;
162   so->base.reference.count = 1;
163   so->base.context = pctx;
164
165   so->texconst0 = A3XX_TEX_CONST_0_TILE_MODE(rsc->layout.tile_mode) |
166                   A3XX_TEX_CONST_0_TYPE(tex_type(prsc->target)) |
167                   A3XX_TEX_CONST_0_FMT(fd3_pipe2tex(cso->format)) |
168                   fd3_tex_swiz(cso->format, cso->swizzle_r, cso->swizzle_g,
169                                cso->swizzle_b, cso->swizzle_a);
170
171   if (prsc->target == PIPE_BUFFER || util_format_is_pure_integer(cso->format))
172      so->texconst0 |= A3XX_TEX_CONST_0_NOCONVERT;
173   if (util_format_is_srgb(cso->format))
174      so->texconst0 |= A3XX_TEX_CONST_0_SRGB;
175
176   if (prsc->target == PIPE_BUFFER) {
177      lvl = 0;
178      so->texconst1 =
179         A3XX_TEX_CONST_1_WIDTH(cso->u.buf.size /
180                                util_format_get_blocksize(cso->format)) |
181         A3XX_TEX_CONST_1_HEIGHT(1);
182   } else {
183      unsigned miplevels;
184
185      lvl = fd_sampler_first_level(cso);
186      miplevels = fd_sampler_last_level(cso) - lvl;
187
188      so->texconst0 |= A3XX_TEX_CONST_0_MIPLVLS(miplevels);
189      so->texconst1 = A3XX_TEX_CONST_1_PITCHALIGN(rsc->layout.pitchalign - 4) |
190                      A3XX_TEX_CONST_1_WIDTH(u_minify(prsc->width0, lvl)) |
191                      A3XX_TEX_CONST_1_HEIGHT(u_minify(prsc->height0, lvl));
192   }
193   /* when emitted, A3XX_TEX_CONST_2_INDX() must be OR'd in: */
194   struct fdl_slice *slice = fd_resource_slice(rsc, lvl);
195   so->texconst2 = A3XX_TEX_CONST_2_PITCH(fd_resource_pitch(rsc, lvl));
196   switch (prsc->target) {
197   case PIPE_TEXTURE_1D_ARRAY:
198   case PIPE_TEXTURE_2D_ARRAY:
199      so->texconst3 = A3XX_TEX_CONST_3_DEPTH(prsc->array_size - 1) |
200                      A3XX_TEX_CONST_3_LAYERSZ1(slice->size0);
201      break;
202   case PIPE_TEXTURE_3D:
203      so->texconst3 = A3XX_TEX_CONST_3_DEPTH(u_minify(prsc->depth0, lvl)) |
204                      A3XX_TEX_CONST_3_LAYERSZ1(slice->size0);
205      so->texconst3 |= A3XX_TEX_CONST_3_LAYERSZ2(
206         fd_resource_slice(rsc, prsc->last_level)->size0);
207      break;
208   default:
209      so->texconst3 = 0x00000000;
210      break;
211   }
212
213   return &so->base;
214}
215
216void
217fd3_texture_init(struct pipe_context *pctx)
218{
219   pctx->create_sampler_state = fd3_sampler_state_create;
220   pctx->bind_sampler_states = fd_sampler_states_bind;
221   pctx->create_sampler_view = fd3_sampler_view_create;
222   pctx->set_sampler_views = fd_set_sampler_views;
223}
224