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

   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/u_string.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_inlines.h"
  31 #include "util/format/u_format.h"
  32
  33 #include "fd3_texture.h"
  34 #include "fd3_format.h"
  35
  36 static enum a3xx_tex_clamp
  37 tex_clamp(unsigned wrap, bool clamp_to_edge, bool *needs_border)
  38 {
  39         /* Hardware does not support _CLAMP, but we emulate it: */
  40         if (wrap == PIPE_TEX_WRAP_CLAMP) {
  41                 wrap = (clamp_to_edge) ?
  42                         PIPE_TEX_WRAP_CLAMP_TO_EDGE : PIPE_TEX_WRAP_CLAMP_TO_BORDER;
  43         }
  44
  45         switch (wrap) {
  46         case PIPE_TEX_WRAP_REPEAT:
  47                 return A3XX_TEX_REPEAT;
  48         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  49                 return A3XX_TEX_CLAMP_TO_EDGE;
  50         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  51                 *needs_border = true;
  52                 return A3XX_TEX_CLAMP_TO_BORDER;
  53         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  54                 /* only works for PoT.. need to emulate otherwise! */
  55                 return A3XX_TEX_MIRROR_CLAMP;
  56         case PIPE_TEX_WRAP_MIRROR_REPEAT:
  57                 return A3XX_TEX_MIRROR_REPEAT;
  58         case PIPE_TEX_WRAP_MIRROR_CLAMP:
  59         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  60                 /* these two we could perhaps emulate, but we currently
  61                  * just don't advertise PIPE_CAP_TEXTURE_MIRROR_CLAMP
  62                  */
  63         default:
  64                 DBG("invalid wrap: %u", wrap);
  65                 return 0;
  66         }
  67 }
  68
  69 static enum a3xx_tex_filter
  70 tex_filter(unsigned filter, bool aniso)
  71 {
  72         switch (filter) {
  73         case PIPE_TEX_FILTER_NEAREST:
  74                 return A3XX_TEX_NEAREST;
  75         case PIPE_TEX_FILTER_LINEAR:
  76                 return aniso ? A3XX_TEX_ANISO : A3XX_TEX_LINEAR;
  77         default:
  78                 DBG("invalid filter: %u", filter);
  79                 return 0;
  80         }
  81 }
  82
  83 static void *
  84 fd3_sampler_state_create(struct pipe_context *pctx,
  85                 const struct pipe_sampler_state *cso)
  86 {
  87         struct fd3_sampler_stateobj *so = CALLOC_STRUCT(fd3_sampler_stateobj);
  88         unsigned aniso = util_last_bit(MIN2(cso->max_anisotropy >> 1, 8));
  89         bool miplinear = false;
  90         bool clamp_to_edge;
  91
  92         if (!so)
  93                 return NULL;
  94
  95         if (cso->min_mip_filter == PIPE_TEX_MIPFILTER_LINEAR)
  96                 miplinear = true;
  97
  98         so->base = *cso;
  99
 100         /*
 101          * For nearest filtering, _CLAMP means _CLAMP_TO_EDGE;  for linear
 102          * filtering, _CLAMP means _CLAMP_TO_BORDER while additionally
 103          * clamping the texture coordinates to [0.0, 1.0].
 104          *
 105          * The clamping will be taken care of in the shaders.  There are two
 106          * filters here, but let the minification one has a say.
 107          */
 108         clamp_to_edge = (cso->min_img_filter == PIPE_TEX_FILTER_NEAREST);
 109         if (!clamp_to_edge) {
 110                 so->saturate_s = (cso->wrap_s == PIPE_TEX_WRAP_CLAMP);
 111                 so->saturate_t = (cso->wrap_t == PIPE_TEX_WRAP_CLAMP);
 112                 so->saturate_r = (cso->wrap_r == PIPE_TEX_WRAP_CLAMP);
 113         }
 114
 115         so->needs_border = false;
 116         so->texsamp0 =
 117                         COND(!cso->normalized_coords, A3XX_TEX_SAMP_0_UNNORM_COORDS) |
 118                         COND(!cso->seamless_cube_map, A3XX_TEX_SAMP_0_CUBEMAPSEAMLESSFILTOFF) |
 119                         COND(miplinear, A3XX_TEX_SAMP_0_MIPFILTER_LINEAR) |
 120                         A3XX_TEX_SAMP_0_XY_MAG(tex_filter(cso->mag_img_filter, aniso)) |
 121                         A3XX_TEX_SAMP_0_XY_MIN(tex_filter(cso->min_img_filter, aniso)) |
 122                         A3XX_TEX_SAMP_0_ANISO(aniso) |
 123                         A3XX_TEX_SAMP_0_WRAP_S(tex_clamp(cso->wrap_s, clamp_to_edge, &so->needs_border)) |
 124                         A3XX_TEX_SAMP_0_WRAP_T(tex_clamp(cso->wrap_t, clamp_to_edge, &so->needs_border)) |
 125                         A3XX_TEX_SAMP_0_WRAP_R(tex_clamp(cso->wrap_r, clamp_to_edge, &so->needs_border));
 126
 127         if (cso->compare_mode)
 128                 so->texsamp0 |= A3XX_TEX_SAMP_0_COMPARE_FUNC(cso->compare_func); /* maps 1:1 */
 129
 130         so->texsamp1 = A3XX_TEX_SAMP_1_LOD_BIAS(cso->lod_bias);
 131
 132         if (cso->min_mip_filter != PIPE_TEX_MIPFILTER_NONE) {
 133                 so->texsamp1 |=
 134                         A3XX_TEX_SAMP_1_MIN_LOD(cso->min_lod) |
 135                         A3XX_TEX_SAMP_1_MAX_LOD(cso->max_lod);
 136         } else {
 137                 /* If we're not doing mipmap filtering, we still need a slightly > 0
 138                  * LOD clamp so the HW can decide between min and mag filtering of
 139                  * level 0.
 140                  */
 141                 so->texsamp1 |=
 142                         A3XX_TEX_SAMP_1_MIN_LOD(MIN2(cso->min_lod, 0.125)) |
 143                         A3XX_TEX_SAMP_1_MAX_LOD(MIN2(cso->max_lod, 0.125));
 144         }
 145
 146         return so;
 147 }
 148
 149 static void
 150 fd3_sampler_states_bind(struct pipe_context *pctx,
 151                 enum pipe_shader_type shader, unsigned start,
 152                 unsigned nr, void **hwcso)
 153 {
 154         struct fd_context *ctx = fd_context(pctx);
 155         struct fd3_context *fd3_ctx = fd3_context(ctx);
 156         uint16_t saturate_s = 0, saturate_t = 0, saturate_r = 0;
 157         unsigned i;
 158
 159         if (!hwcso)
 160                 nr = 0;
 161
 162         for (i = 0; i < nr; i++) {
 163                 if (hwcso[i]) {
 164                         struct fd3_sampler_stateobj *sampler =
 165                                         fd3_sampler_stateobj(hwcso[i]);
 166                         if (sampler->saturate_s)
 167                                 saturate_s |= (1 << i);
 168                         if (sampler->saturate_t)
 169                                 saturate_t |= (1 << i);
 170                         if (sampler->saturate_r)
 171                                 saturate_r |= (1 << i);
 172                 }
 173         }
 174
 175         fd_sampler_states_bind(pctx, shader, start, nr, hwcso);
 176
 177         if (shader == PIPE_SHADER_FRAGMENT) {
 178                 fd3_ctx->fsaturate =
 179                         (saturate_s != 0) ||
 180                         (saturate_t != 0) ||
 181                         (saturate_r != 0);
 182                 fd3_ctx->fsaturate_s = saturate_s;
 183                 fd3_ctx->fsaturate_t = saturate_t;
 184                 fd3_ctx->fsaturate_r = saturate_r;
 185         } else if (shader == PIPE_SHADER_VERTEX) {
 186                 fd3_ctx->vsaturate =
 187                         (saturate_s != 0) ||
 188                         (saturate_t != 0) ||
 189                         (saturate_r != 0);
 190                 fd3_ctx->vsaturate_s = saturate_s;
 191                 fd3_ctx->vsaturate_t = saturate_t;
 192                 fd3_ctx->vsaturate_r = saturate_r;
 193         }
 194 }
 195
 196 static enum a3xx_tex_type
 197 tex_type(unsigned target)
 198 {
 199         switch (target) {
 200         default:
 201                 assert(0);
 202         case PIPE_BUFFER:
 203         case PIPE_TEXTURE_1D:
 204         case PIPE_TEXTURE_1D_ARRAY:
 205                 return A3XX_TEX_1D;
 206         case PIPE_TEXTURE_RECT:
 207         case PIPE_TEXTURE_2D:
 208         case PIPE_TEXTURE_2D_ARRAY:
 209                 return A3XX_TEX_2D;
 210         case PIPE_TEXTURE_3D:
 211                 return A3XX_TEX_3D;
 212         case PIPE_TEXTURE_CUBE:
 213         case PIPE_TEXTURE_CUBE_ARRAY:
 214                 return A3XX_TEX_CUBE;
 215         }
 216 }
 217
 218 static struct pipe_sampler_view *
 219 fd3_sampler_view_create(struct pipe_context *pctx, struct pipe_resource *prsc,
 220                 const struct pipe_sampler_view *cso)
 221 {
 222         struct fd3_pipe_sampler_view *so = CALLOC_STRUCT(fd3_pipe_sampler_view);
 223         struct fd_resource *rsc = fd_resource(prsc);
 224         unsigned lvl;
 225         uint32_t sz2 = 0;
 226
 227         if (!so)
 228                 return NULL;
 229
 230         so->base = *cso;
 231         pipe_reference(NULL, &prsc->reference);
 232         so->base.texture = prsc;
 233         so->base.reference.count = 1;
 234         so->base.context = pctx;
 235
 236         so->texconst0 =
 237                         A3XX_TEX_CONST_0_TILE_MODE(rsc->tile_mode) |
 238                         A3XX_TEX_CONST_0_TYPE(tex_type(prsc->target)) |
 239                         A3XX_TEX_CONST_0_FMT(fd3_pipe2tex(cso->format)) |
 240                         fd3_tex_swiz(cso->format, cso->swizzle_r, cso->swizzle_g,
 241                                                 cso->swizzle_b, cso->swizzle_a);
 242
 243         if (prsc->target == PIPE_BUFFER || util_format_is_pure_integer(cso->format))
 244                 so->texconst0 |= A3XX_TEX_CONST_0_NOCONVERT;
 245         if (util_format_is_srgb(cso->format))
 246                 so->texconst0 |= A3XX_TEX_CONST_0_SRGB;
 247
 248         if (prsc->target == PIPE_BUFFER) {
 249                 lvl = 0;
 250                 so->texconst1 =
 251                         A3XX_TEX_CONST_1_FETCHSIZE(fd3_pipe2fetchsize(cso->format)) |
 252                         A3XX_TEX_CONST_1_WIDTH(cso->u.buf.size / util_format_get_blocksize(cso->format)) |
 253                         A3XX_TEX_CONST_1_HEIGHT(1);
 254         } else {
 255                 unsigned miplevels;
 256
 257                 lvl = fd_sampler_first_level(cso);
 258                 miplevels = fd_sampler_last_level(cso) - lvl;
 259
 260                 so->texconst0 |= A3XX_TEX_CONST_0_MIPLVLS(miplevels);
 261                 so->texconst1 =
 262                         A3XX_TEX_CONST_1_FETCHSIZE(fd3_pipe2fetchsize(cso->format)) |
 263                         A3XX_TEX_CONST_1_WIDTH(u_minify(prsc->width0, lvl)) |
 264                         A3XX_TEX_CONST_1_HEIGHT(u_minify(prsc->height0, lvl));
 265         }
 266         /* when emitted, A3XX_TEX_CONST_2_INDX() must be OR'd in: */
 267         so->texconst2 =
 268                         A3XX_TEX_CONST_2_PITCH(fd3_pipe2nblocksx(cso->format, rsc->slices[lvl].pitch) * rsc->cpp);
 269         switch (prsc->target) {
 270         case PIPE_TEXTURE_1D_ARRAY:
 271         case PIPE_TEXTURE_2D_ARRAY:
 272                 so->texconst3 =
 273                                 A3XX_TEX_CONST_3_DEPTH(prsc->array_size - 1) |
 274                                 A3XX_TEX_CONST_3_LAYERSZ1(rsc->slices[0].size0);
 275                 break;
 276         case PIPE_TEXTURE_3D:
 277                 so->texconst3 =
 278                                 A3XX_TEX_CONST_3_DEPTH(u_minify(prsc->depth0, lvl)) |
 279                                 A3XX_TEX_CONST_3_LAYERSZ1(rsc->slices[lvl].size0);
 280                 while (lvl < cso->u.tex.last_level && sz2 != rsc->slices[lvl+1].size0)
 281                         sz2 = rsc->slices[++lvl].size0;
 282                 so->texconst3 |= A3XX_TEX_CONST_3_LAYERSZ2(sz2);
 283                 break;
 284         default:
 285                 so->texconst3 = 0x00000000;
 286                 break;
 287         }
 288
 289         return &so->base;
 290 }
 291
 292 void
 293 fd3_texture_init(struct pipe_context *pctx)
 294 {
 295         pctx->create_sampler_state = fd3_sampler_state_create;
 296         pctx->bind_sampler_states = fd3_sampler_states_bind;
 297         pctx->create_sampler_view = fd3_sampler_view_create;
 298         pctx->set_sampler_views = fd_set_sampler_views;
 299 }