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_util.h"
  37
  38 static enum a3xx_tex_clamp
  39 tex_clamp(unsigned wrap, bool clamp_to_edge)
  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                 return A3XX_TEX_CLAMP_TO_BORDER;
  54         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  55                 /* only works for PoT.. need to emulate otherwise! */
  56                 return A3XX_TEX_MIRROR_CLAMP;
  57         case PIPE_TEX_WRAP_MIRROR_REPEAT:
  58                 return A3XX_TEX_MIRROR_REPEAT;
  59         case PIPE_TEX_WRAP_MIRROR_CLAMP:
  60         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  61                 /* these two we could perhaps emulate, but we currently
  62                  * just don't advertise PIPE_CAP_TEXTURE_MIRROR_CLAMP
  63                  */
  64         default:
  65                 DBG("invalid wrap: %u", wrap);
  66                 return 0;
  67         }
  68 }
  69
  70 static enum a3xx_tex_filter
  71 tex_filter(unsigned filter)
  72 {
  73         switch (filter) {
  74         case PIPE_TEX_FILTER_NEAREST:
  75                 return A3XX_TEX_NEAREST;
  76         case PIPE_TEX_FILTER_LINEAR:
  77                 return A3XX_TEX_LINEAR;
  78         default:
  79                 DBG("invalid filter: %u", filter);
  80                 return 0;
  81         }
  82 }
  83
  84 static void *
  85 fd3_sampler_state_create(struct pipe_context *pctx,
  86                 const struct pipe_sampler_state *cso)
  87 {
  88         struct fd3_sampler_stateobj *so = CALLOC_STRUCT(fd3_sampler_stateobj);
  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->texsamp0 =
 116                         COND(!cso->normalized_coords, A3XX_TEX_SAMP_0_UNNORM_COORDS) |
 117                         COND(miplinear, A3XX_TEX_SAMP_0_MIPFILTER_LINEAR) |
 118                         A3XX_TEX_SAMP_0_XY_MAG(tex_filter(cso->mag_img_filter)) |
 119                         A3XX_TEX_SAMP_0_XY_MIN(tex_filter(cso->min_img_filter)) |
 120                         A3XX_TEX_SAMP_0_WRAP_S(tex_clamp(cso->wrap_s, clamp_to_edge)) |
 121                         A3XX_TEX_SAMP_0_WRAP_T(tex_clamp(cso->wrap_t, clamp_to_edge)) |
 122                         A3XX_TEX_SAMP_0_WRAP_R(tex_clamp(cso->wrap_r, clamp_to_edge));
 123
 124         if (cso->compare_mode)
 125                 so->texsamp0 |= A3XX_TEX_SAMP_0_COMPARE_FUNC(cso->compare_func); /* maps 1:1 */
 126
 127         if (cso->min_mip_filter != PIPE_TEX_MIPFILTER_NONE) {
 128                 so->texsamp1 =
 129                                 A3XX_TEX_SAMP_1_LOD_BIAS(cso->lod_bias) |
 130                                 A3XX_TEX_SAMP_1_MIN_LOD(cso->min_lod) |
 131                                 A3XX_TEX_SAMP_1_MAX_LOD(cso->max_lod);
 132         } else {
 133                 so->texsamp1 = 0x00000000;
 134         }
 135
 136         return so;
 137 }
 138
 139 static void
 140 fd3_sampler_states_bind(struct pipe_context *pctx,
 141                 unsigned shader, unsigned start,
 142                 unsigned nr, void **hwcso)
 143 {
 144         struct fd_context *ctx = fd_context(pctx);
 145         struct fd3_context *fd3_ctx = fd3_context(ctx);
 146         unsigned saturate_s = 0, saturate_t = 0, saturate_r = 0;
 147         unsigned i;
 148
 149         for (i = 0; i < nr; i++) {
 150                 if (hwcso[i]) {
 151                         struct fd3_sampler_stateobj *sampler =
 152                                         fd3_sampler_stateobj(hwcso[i]);
 153                         if (sampler->saturate_s)
 154                                 saturate_s |= (1 << i);
 155                         if (sampler->saturate_t)
 156                                 saturate_t |= (1 << i);
 157                         if (sampler->saturate_r)
 158                                 saturate_r |= (1 << i);
 159                 }
 160         }
 161
 162         fd_sampler_states_bind(pctx, shader, start, nr, hwcso);
 163
 164         if (shader == PIPE_SHADER_FRAGMENT) {
 165                 fd3_ctx->fsaturate_s = saturate_s;
 166                 fd3_ctx->fsaturate_t = saturate_t;
 167                 fd3_ctx->fsaturate_r = saturate_r;
 168         } else if (shader == PIPE_SHADER_VERTEX) {
 169                 fd3_ctx->vsaturate_s = saturate_s;
 170                 fd3_ctx->vsaturate_t = saturate_t;
 171                 fd3_ctx->vsaturate_r = saturate_r;
 172         }
 173 }
 174
 175 static enum a3xx_tex_type
 176 tex_type(unsigned target)
 177 {
 178         switch (target) {
 179         default:
 180                 assert(0);
 181         case PIPE_BUFFER:
 182         case PIPE_TEXTURE_1D:
 183         case PIPE_TEXTURE_1D_ARRAY:
 184                 return A3XX_TEX_1D;
 185         case PIPE_TEXTURE_RECT:
 186         case PIPE_TEXTURE_2D:
 187         case PIPE_TEXTURE_2D_ARRAY:
 188                 return A3XX_TEX_2D;
 189         case PIPE_TEXTURE_3D:
 190                 return A3XX_TEX_3D;
 191         case PIPE_TEXTURE_CUBE:
 192         case PIPE_TEXTURE_CUBE_ARRAY:
 193                 return A3XX_TEX_CUBE;
 194         }
 195 }
 196
 197 static struct pipe_sampler_view *
 198 fd3_sampler_view_create(struct pipe_context *pctx, struct pipe_resource *prsc,
 199                 const struct pipe_sampler_view *cso)
 200 {
 201         struct fd3_pipe_sampler_view *so = CALLOC_STRUCT(fd3_pipe_sampler_view);
 202         struct fd_resource *rsc = fd_resource(prsc);
 203         unsigned lvl = cso->u.tex.first_level;
 204         unsigned miplevels = cso->u.tex.last_level - lvl;
 205
 206         if (!so)
 207                 return NULL;
 208
 209         so->base = *cso;
 210         pipe_reference(NULL, &prsc->reference);
 211         so->base.texture = prsc;
 212         so->base.reference.count = 1;
 213         so->base.context = pctx;
 214
 215         so->tex_resource =  rsc;
 216
 217         so->texconst0 =
 218                         A3XX_TEX_CONST_0_TYPE(tex_type(prsc->target)) |
 219                         A3XX_TEX_CONST_0_FMT(fd3_pipe2tex(cso->format)) |
 220                         A3XX_TEX_CONST_0_MIPLVLS(miplevels) |
 221                         fd3_tex_swiz(cso->format, cso->swizzle_r, cso->swizzle_g,
 222                                                 cso->swizzle_b, cso->swizzle_a);
 223
 224         if (util_format_is_srgb(cso->format))
 225                 so->texconst0 |= A3XX_TEX_CONST_0_SRGB;
 226
 227         so->texconst1 =
 228                         A3XX_TEX_CONST_1_FETCHSIZE(fd3_pipe2fetchsize(cso->format)) |
 229                         A3XX_TEX_CONST_1_WIDTH(u_minify(prsc->width0, lvl)) |
 230                         A3XX_TEX_CONST_1_HEIGHT(u_minify(prsc->height0, lvl));
 231         /* when emitted, A3XX_TEX_CONST_2_INDX() must be OR'd in: */
 232         so->texconst2 =
 233                         A3XX_TEX_CONST_2_PITCH(rsc->slices[lvl].pitch * rsc->cpp);
 234         switch (prsc->target) {
 235         case PIPE_TEXTURE_1D_ARRAY:
 236         case PIPE_TEXTURE_2D_ARRAY:
 237                 so->texconst3 =
 238                                 A3XX_TEX_CONST_3_DEPTH(prsc->array_size - 1) |
 239                                 A3XX_TEX_CONST_3_LAYERSZ1(rsc->slices[0].size0) |
 240                                 A3XX_TEX_CONST_3_LAYERSZ2(rsc->slices[0].size0);
 241                 break;
 242         case PIPE_TEXTURE_3D:
 243                 so->texconst3 =
 244                                 A3XX_TEX_CONST_3_DEPTH(u_minify(prsc->depth0, lvl)) |
 245                                 A3XX_TEX_CONST_3_LAYERSZ1(rsc->slices[0].size0) |
 246                                 A3XX_TEX_CONST_3_LAYERSZ2(rsc->slices[0].size0);
 247                 break;
 248         default:
 249                 so->texconst3 = 0x00000000;
 250                 break;
 251         }
 252
 253         return &so->base;
 254 }
 255
 256 void
 257 fd3_texture_init(struct pipe_context *pctx)
 258 {
 259         pctx->create_sampler_state = fd3_sampler_state_create;
 260         pctx->bind_sampler_states = fd3_sampler_states_bind;
 261         pctx->create_sampler_view = fd3_sampler_view_create;
 262 }