src/gallium/drivers/freedreno/a3xx/fd3_texture.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "pipe/p_state.h"
  30 #include "util/u_string.h"
  31 #include "util/u_memory.h"
  32 #include "util/u_inlines.h"
  33 #include "util/u_format.h"
  34
  35 #include "fd3_texture.h"
  36 #include "fd3_format.h"
  37
  38 static enum a3xx_tex_clamp
  39 tex_clamp(unsigned wrap, bool clamp_to_edge, bool *needs_border)
  40 {
  41         /* Hardware does not support _CLAMP, but we emulate it: */
  42         if (wrap == PIPE_TEX_WRAP_CLAMP) {
  43                 wrap = (clamp_to_edge) ?
  44                         PIPE_TEX_WRAP_CLAMP_TO_EDGE : PIPE_TEX_WRAP_CLAMP_TO_BORDER;
  45         }
  46
  47         switch (wrap) {
  48         case PIPE_TEX_WRAP_REPEAT:
  49                 return A3XX_TEX_REPEAT;
  50         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  51                 return A3XX_TEX_CLAMP_TO_EDGE;
  52         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  53                 *needs_border = true;
  54                 return A3XX_TEX_CLAMP_TO_BORDER;
  55         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  56                 /* only works for PoT.. need to emulate otherwise! */
  57                 return A3XX_TEX_MIRROR_CLAMP;
  58         case PIPE_TEX_WRAP_MIRROR_REPEAT:
  59                 return A3XX_TEX_MIRROR_REPEAT;
  60         case PIPE_TEX_WRAP_MIRROR_CLAMP:
  61         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  62                 /* these two we could perhaps emulate, but we currently
  63                  * just don't advertise PIPE_CAP_TEXTURE_MIRROR_CLAMP
  64                  */
  65         default:
  66                 DBG("invalid wrap: %u", wrap);
  67                 return 0;
  68         }
  69 }
  70
  71 static enum a3xx_tex_filter
  72 tex_filter(unsigned filter, bool aniso)
  73 {
  74         switch (filter) {
  75         case PIPE_TEX_FILTER_NEAREST:
  76                 return A3XX_TEX_NEAREST;
  77         case PIPE_TEX_FILTER_LINEAR:
  78                 return aniso ? A3XX_TEX_ANISO : A3XX_TEX_LINEAR;
  79         default:
  80                 DBG("invalid filter: %u", filter);
  81                 return 0;
  82         }
  83 }
  84
  85 static void *
  86 fd3_sampler_state_create(struct pipe_context *pctx,
  87                 const struct pipe_sampler_state *cso)
  88 {
  89         struct fd3_sampler_stateobj *so = CALLOC_STRUCT(fd3_sampler_stateobj);
  90         unsigned aniso = util_last_bit(MIN2(cso->max_anisotropy >> 1, 8));
  91         bool miplinear = false;
  92         bool clamp_to_edge;
  93
  94         if (!so)
  95                 return NULL;
  96
  97         if (cso->min_mip_filter == PIPE_TEX_MIPFILTER_LINEAR)
  98                 miplinear = true;
  99
 100         so->base = *cso;
 101
 102         /*
 103          * For nearest filtering, _CLAMP means _CLAMP_TO_EDGE;  for linear
 104          * filtering, _CLAMP means _CLAMP_TO_BORDER while additionally
 105          * clamping the texture coordinates to [0.0, 1.0].
 106          *
 107          * The clamping will be taken care of in the shaders.  There are two
 108          * filters here, but let the minification one has a say.
 109          */
 110         clamp_to_edge = (cso->min_img_filter == PIPE_TEX_FILTER_NEAREST);
 111         if (!clamp_to_edge) {
 112                 so->saturate_s = (cso->wrap_s == PIPE_TEX_WRAP_CLAMP);
 113                 so->saturate_t = (cso->wrap_t == PIPE_TEX_WRAP_CLAMP);
 114                 so->saturate_r = (cso->wrap_r == PIPE_TEX_WRAP_CLAMP);
 115         }
 116
 117         so->needs_border = false;
 118         so->texsamp0 =
 119                         COND(!cso->normalized_coords, A3XX_TEX_SAMP_0_UNNORM_COORDS) |
 120                         COND(!cso->seamless_cube_map, A3XX_TEX_SAMP_0_CUBEMAPSEAMLESSFILTOFF) |
 121                         COND(miplinear, A3XX_TEX_SAMP_0_MIPFILTER_LINEAR) |
 122                         A3XX_TEX_SAMP_0_XY_MAG(tex_filter(cso->mag_img_filter, aniso)) |
 123                         A3XX_TEX_SAMP_0_XY_MIN(tex_filter(cso->min_img_filter, aniso)) |
 124                         A3XX_TEX_SAMP_0_ANISO(aniso) |
 125                         A3XX_TEX_SAMP_0_WRAP_S(tex_clamp(cso->wrap_s, clamp_to_edge, &so->needs_border)) |
 126                         A3XX_TEX_SAMP_0_WRAP_T(tex_clamp(cso->wrap_t, clamp_to_edge, &so->needs_border)) |
 127                         A3XX_TEX_SAMP_0_WRAP_R(tex_clamp(cso->wrap_r, clamp_to_edge, &so->needs_border));
 128
 129         if (cso->compare_mode)
 130                 so->texsamp0 |= A3XX_TEX_SAMP_0_COMPARE_FUNC(cso->compare_func); /* maps 1:1 */
 131
 132         if (cso->min_mip_filter != PIPE_TEX_MIPFILTER_NONE) {
 133                 so->texsamp1 =
 134                                 A3XX_TEX_SAMP_1_LOD_BIAS(cso->lod_bias) |
 135                                 A3XX_TEX_SAMP_1_MIN_LOD(cso->min_lod) |
 136                                 A3XX_TEX_SAMP_1_MAX_LOD(cso->max_lod);
 137         } else {
 138                 so->texsamp1 = 0x00000000;
 139         }
 140
 141         return so;
 142 }
 143
 144 static void
 145 fd3_sampler_states_bind(struct pipe_context *pctx,
 146                 unsigned shader, unsigned start,
 147                 unsigned nr, void **hwcso)
 148 {
 149         struct fd_context *ctx = fd_context(pctx);
 150         struct fd3_context *fd3_ctx = fd3_context(ctx);
 151         uint16_t saturate_s = 0, saturate_t = 0, saturate_r = 0;
 152         unsigned i;
 153
 154         if (!hwcso)
 155                 nr = 0;
 156
 157         for (i = 0; i < nr; i++) {
 158                 if (hwcso[i]) {
 159                         struct fd3_sampler_stateobj *sampler =
 160                                         fd3_sampler_stateobj(hwcso[i]);
 161                         if (sampler->saturate_s)
 162                                 saturate_s |= (1 << i);
 163                         if (sampler->saturate_t)
 164                                 saturate_t |= (1 << i);
 165                         if (sampler->saturate_r)
 166                                 saturate_r |= (1 << i);
 167                 }
 168         }
 169
 170         fd_sampler_states_bind(pctx, shader, start, nr, hwcso);
 171
 172         if (shader == PIPE_SHADER_FRAGMENT) {
 173                 fd3_ctx->fsaturate =
 174                         (saturate_s != 0) ||
 175                         (saturate_t != 0) ||
 176                         (saturate_r != 0);
 177                 fd3_ctx->fsaturate_s = saturate_s;
 178                 fd3_ctx->fsaturate_t = saturate_t;
 179                 fd3_ctx->fsaturate_r = saturate_r;
 180         } else if (shader == PIPE_SHADER_VERTEX) {
 181                 fd3_ctx->vsaturate =
 182                         (saturate_s != 0) ||
 183                         (saturate_t != 0) ||
 184                         (saturate_r != 0);
 185                 fd3_ctx->vsaturate_s = saturate_s;
 186                 fd3_ctx->vsaturate_t = saturate_t;
 187                 fd3_ctx->vsaturate_r = saturate_r;
 188         }
 189 }
 190
 191 static enum a3xx_tex_type
 192 tex_type(unsigned target)
 193 {
 194         switch (target) {
 195         default:
 196                 assert(0);
 197         case PIPE_BUFFER:
 198         case PIPE_TEXTURE_1D:
 199         case PIPE_TEXTURE_1D_ARRAY:
 200                 return A3XX_TEX_1D;
 201         case PIPE_TEXTURE_RECT:
 202         case PIPE_TEXTURE_2D:
 203         case PIPE_TEXTURE_2D_ARRAY:
 204                 return A3XX_TEX_2D;
 205         case PIPE_TEXTURE_3D:
 206                 return A3XX_TEX_3D;
 207         case PIPE_TEXTURE_CUBE:
 208         case PIPE_TEXTURE_CUBE_ARRAY:
 209                 return A3XX_TEX_CUBE;
 210         }
 211 }
 212
 213 static struct pipe_sampler_view *
 214 fd3_sampler_view_create(struct pipe_context *pctx, struct pipe_resource *prsc,
 215                 const struct pipe_sampler_view *cso)
 216 {
 217         struct fd3_pipe_sampler_view *so = CALLOC_STRUCT(fd3_pipe_sampler_view);
 218         struct fd_resource *rsc = fd_resource(prsc);
 219         unsigned lvl;
 220         uint32_t sz2 = 0;
 221
 222         if (!so)
 223                 return NULL;
 224
 225         so->base = *cso;
 226         pipe_reference(NULL, &prsc->reference);
 227         so->base.texture = prsc;
 228         so->base.reference.count = 1;
 229         so->base.context = pctx;
 230
 231         so->texconst0 =
 232                         A3XX_TEX_CONST_0_TYPE(tex_type(prsc->target)) |
 233                         A3XX_TEX_CONST_0_FMT(fd3_pipe2tex(cso->format)) |
 234                         fd3_tex_swiz(cso->format, cso->swizzle_r, cso->swizzle_g,
 235                                                 cso->swizzle_b, cso->swizzle_a);
 236
 237         if (util_format_is_srgb(cso->format))
 238                 so->texconst0 |= A3XX_TEX_CONST_0_SRGB;
 239
 240         if (prsc->target == PIPE_BUFFER) {
 241                 lvl = 0;
 242                 so->texconst1 =
 243                         A3XX_TEX_CONST_1_FETCHSIZE(fd3_pipe2fetchsize(cso->format)) |
 244                         A3XX_TEX_CONST_1_WIDTH(cso->u.buf.last_element -
 245                                                                    cso->u.buf.first_element + 1) |
 246                         A3XX_TEX_CONST_1_HEIGHT(1);
 247         } else {
 248                 unsigned miplevels;
 249
 250                 lvl = fd_sampler_first_level(cso);
 251                 miplevels = fd_sampler_last_level(cso) - lvl;
 252
 253                 so->texconst0 |= A3XX_TEX_CONST_0_MIPLVLS(miplevels);
 254                 so->texconst1 =
 255                         A3XX_TEX_CONST_1_FETCHSIZE(fd3_pipe2fetchsize(cso->format)) |
 256                         A3XX_TEX_CONST_1_WIDTH(u_minify(prsc->width0, lvl)) |
 257                         A3XX_TEX_CONST_1_HEIGHT(u_minify(prsc->height0, lvl));
 258         }
 259         /* when emitted, A3XX_TEX_CONST_2_INDX() must be OR'd in: */
 260         so->texconst2 =
 261                         A3XX_TEX_CONST_2_PITCH(fd3_pipe2nblocksx(cso->format, rsc->slices[lvl].pitch) * rsc->cpp);
 262         switch (prsc->target) {
 263         case PIPE_TEXTURE_1D_ARRAY:
 264         case PIPE_TEXTURE_2D_ARRAY:
 265                 so->texconst3 =
 266                                 A3XX_TEX_CONST_3_DEPTH(prsc->array_size - 1) |
 267                                 A3XX_TEX_CONST_3_LAYERSZ1(rsc->slices[0].size0);
 268                 break;
 269         case PIPE_TEXTURE_3D:
 270                 so->texconst3 =
 271                                 A3XX_TEX_CONST_3_DEPTH(u_minify(prsc->depth0, lvl)) |
 272                                 A3XX_TEX_CONST_3_LAYERSZ1(rsc->slices[lvl].size0);
 273                 while (lvl < cso->u.tex.last_level && sz2 != rsc->slices[lvl+1].size0)
 274                         sz2 = rsc->slices[++lvl].size0;
 275                 so->texconst3 |= A3XX_TEX_CONST_3_LAYERSZ2(sz2);
 276                 break;
 277         default:
 278                 so->texconst3 = 0x00000000;
 279                 break;
 280         }
 281
 282         return &so->base;
 283 }
 284
 285 void
 286 fd3_texture_init(struct pipe_context *pctx)
 287 {
 288         pctx->create_sampler_state = fd3_sampler_state_create;
 289         pctx->bind_sampler_states = fd3_sampler_states_bind;
 290         pctx->create_sampler_view = fd3_sampler_view_create;
 291         pctx->set_sampler_views = fd_set_sampler_views;
 292 }