src/mesa/state_tracker/st_atom_texture.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keithw@vmware.com>
  31   *   Brian Paul
  32   */
  33
  34
  35 #include "main/context.h"
  36 #include "main/macros.h"
  37 #include "main/mtypes.h"
  38 #include "main/samplerobj.h"
  39 #include "main/teximage.h"
  40 #include "main/texobj.h"
  41 #include "program/prog_instruction.h"
  42
  43 #include "st_context.h"
  44 #include "st_atom.h"
  45 #include "st_sampler_view.h"
  46 #include "st_texture.h"
  47 #include "st_format.h"
  48 #include "st_cb_texture.h"
  49 #include "pipe/p_context.h"
  50 #include "util/u_format.h"
  51 #include "util/u_inlines.h"
  52 #include "cso_cache/cso_context.h"
  53
  54
  55 static GLboolean
  56 update_single_texture(struct st_context *st,
  57                       struct pipe_sampler_view **sampler_view,
  58                       GLuint texUnit, unsigned glsl_version)
  59 {
  60    struct gl_context *ctx = st->ctx;
  61    const struct gl_sampler_object *samp;
  62    struct gl_texture_object *texObj;
  63    struct st_texture_object *stObj;
  64    GLboolean retval;
  65
  66    samp = _mesa_get_samplerobj(ctx, texUnit);
  67
  68    texObj = ctx->Texture.Unit[texUnit]._Current;
  69
  70    if (!texObj) {
  71       texObj = _mesa_get_fallback_texture(ctx, TEXTURE_2D_INDEX);
  72       samp = &texObj->Sampler;
  73    }
  74    stObj = st_texture_object(texObj);
  75
  76    retval = st_finalize_texture(ctx, st->pipe, texObj);
  77    if (!retval) {
  78       /* out of mem */
  79       return GL_FALSE;
  80    }
  81
  82    /* Check a few pieces of state outside the texture object to see if we
  83     * need to force revalidation.
  84     */
  85    if (stObj->prev_glsl_version != glsl_version ||
  86        stObj->prev_sRGBDecode != samp->sRGBDecode) {
  87
  88       st_texture_release_all_sampler_views(st, stObj);
  89
  90       stObj->prev_glsl_version = glsl_version;
  91       stObj->prev_sRGBDecode = samp->sRGBDecode;
  92    }
  93
  94    *sampler_view =
  95       st_get_texture_sampler_view_from_stobj(st, stObj, samp, glsl_version);
  96    return GL_TRUE;
  97 }
  98
  99
 100
 101 static void
 102 update_textures(struct st_context *st,
 103                 gl_shader_stage mesa_shader,
 104                 const struct gl_program *prog,
 105                 unsigned max_units,
 106                 struct pipe_sampler_view **sampler_views,
 107                 unsigned *num_textures)
 108 {
 109    const GLuint old_max = *num_textures;
 110    GLbitfield samplers_used = prog->SamplersUsed;
 111    GLbitfield free_slots = ~prog->SamplersUsed;
 112    GLbitfield external_samplers_used = prog->ExternalSamplersUsed;
 113    GLuint unit;
 114    enum pipe_shader_type shader_stage = st_shader_stage_to_ptarget(mesa_shader);
 115
 116    if (samplers_used == 0x0 && old_max == 0)
 117       return;
 118
 119    *num_textures = 0;
 120
 121    /* loop over sampler units (aka tex image units) */
 122    for (unit = 0; unit < max_units; unit++, samplers_used >>= 1) {
 123       struct pipe_sampler_view *sampler_view = NULL;
 124
 125       if (samplers_used & 1) {
 126          const GLuint texUnit = prog->SamplerUnits[unit];
 127          GLboolean retval;
 128
 129          retval = update_single_texture(st, &sampler_view, texUnit,
 130                                         prog->sh.data->Version);
 131          if (retval == GL_FALSE)
 132             continue;
 133
 134          *num_textures = unit + 1;
 135       }
 136       else if (samplers_used == 0 && unit >= old_max) {
 137          /* if we've reset all the old views and we have no more new ones */
 138          break;
 139       }
 140
 141       pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
 142    }
 143
 144    /* For any external samplers with multiplaner YUV, stuff the additional
 145     * sampler views we need at the end.
 146     *
 147     * Trying to cache the sampler view in the stObj looks painful, so just
 148     * re-create the sampler view for the extra planes each time.  Main use
 149     * case is video playback (ie. fps games wouldn't be using this) so I
 150     * guess no point to try to optimize this feature.
 151     */
 152    while (unlikely(external_samplers_used)) {
 153       GLuint unit = u_bit_scan(&external_samplers_used);
 154       GLuint extra = 0;
 155       struct st_texture_object *stObj =
 156             st_get_texture_object(st->ctx, prog, unit);
 157       struct pipe_sampler_view tmpl;
 158
 159       if (!stObj)
 160          continue;
 161
 162       /* use original view as template: */
 163       tmpl = *sampler_views[unit];
 164
 165       switch (st_get_view_format(stObj)) {
 166       case PIPE_FORMAT_NV12:
 167          /* we need one additional R8G8 view: */
 168          tmpl.format = PIPE_FORMAT_RG88_UNORM;
 169          tmpl.swizzle_g = PIPE_SWIZZLE_Y;   /* tmpl from Y plane is R8 */
 170          extra = u_bit_scan(&free_slots);
 171          sampler_views[extra] =
 172                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 173          break;
 174       case PIPE_FORMAT_IYUV:
 175          /* we need two additional R8 views: */
 176          tmpl.format = PIPE_FORMAT_R8_UNORM;
 177          extra = u_bit_scan(&free_slots);
 178          sampler_views[extra] =
 179                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 180          extra = u_bit_scan(&free_slots);
 181          sampler_views[extra] =
 182                st->pipe->create_sampler_view(st->pipe, stObj->pt->next->next, &tmpl);
 183          break;
 184       default:
 185          break;
 186       }
 187
 188       *num_textures = MAX2(*num_textures, extra + 1);
 189    }
 190
 191    cso_set_sampler_views(st->cso_context,
 192                          shader_stage,
 193                          *num_textures,
 194                          sampler_views);
 195 }
 196
 197
 198
 199 static void
 200 update_vertex_textures(struct st_context *st)
 201 {
 202    const struct gl_context *ctx = st->ctx;
 203
 204    if (ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits > 0) {
 205       update_textures(st,
 206                       MESA_SHADER_VERTEX,
 207                       ctx->VertexProgram._Current,
 208                       ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits,
 209                       st->state.sampler_views[PIPE_SHADER_VERTEX],
 210                       &st->state.num_sampler_views[PIPE_SHADER_VERTEX]);
 211    }
 212 }
 213
 214
 215 static void
 216 update_fragment_textures(struct st_context *st)
 217 {
 218    const struct gl_context *ctx = st->ctx;
 219
 220    update_textures(st,
 221                    MESA_SHADER_FRAGMENT,
 222                    ctx->FragmentProgram._Current,
 223                    ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
 224                    st->state.sampler_views[PIPE_SHADER_FRAGMENT],
 225                    &st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
 226 }
 227
 228
 229 static void
 230 update_geometry_textures(struct st_context *st)
 231 {
 232    const struct gl_context *ctx = st->ctx;
 233
 234    if (ctx->GeometryProgram._Current) {
 235       update_textures(st,
 236                       MESA_SHADER_GEOMETRY,
 237                       ctx->GeometryProgram._Current,
 238                       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits,
 239                       st->state.sampler_views[PIPE_SHADER_GEOMETRY],
 240                       &st->state.num_sampler_views[PIPE_SHADER_GEOMETRY]);
 241    }
 242 }
 243
 244
 245 static void
 246 update_tessctrl_textures(struct st_context *st)
 247 {
 248    const struct gl_context *ctx = st->ctx;
 249
 250    if (ctx->TessCtrlProgram._Current) {
 251       update_textures(st,
 252                       MESA_SHADER_TESS_CTRL,
 253                       ctx->TessCtrlProgram._Current,
 254                       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits,
 255                       st->state.sampler_views[PIPE_SHADER_TESS_CTRL],
 256                       &st->state.num_sampler_views[PIPE_SHADER_TESS_CTRL]);
 257    }
 258 }
 259
 260
 261 static void
 262 update_tesseval_textures(struct st_context *st)
 263 {
 264    const struct gl_context *ctx = st->ctx;
 265
 266    if (ctx->TessEvalProgram._Current) {
 267       update_textures(st,
 268                       MESA_SHADER_TESS_EVAL,
 269                       ctx->TessEvalProgram._Current,
 270                       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits,
 271                       st->state.sampler_views[PIPE_SHADER_TESS_EVAL],
 272                       &st->state.num_sampler_views[PIPE_SHADER_TESS_EVAL]);
 273    }
 274 }
 275
 276
 277 static void
 278 update_compute_textures(struct st_context *st)
 279 {
 280    const struct gl_context *ctx = st->ctx;
 281
 282    if (ctx->ComputeProgram._Current) {
 283       update_textures(st,
 284                       MESA_SHADER_COMPUTE,
 285                       ctx->ComputeProgram._Current,
 286                       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits,
 287                       st->state.sampler_views[PIPE_SHADER_COMPUTE],
 288                       &st->state.num_sampler_views[PIPE_SHADER_COMPUTE]);
 289    }
 290 }
 291
 292
 293 const struct st_tracked_state st_update_fragment_texture = {
 294    update_fragment_textures                             /* update */
 295 };
 296
 297
 298 const struct st_tracked_state st_update_vertex_texture = {
 299    update_vertex_textures                               /* update */
 300 };
 301
 302
 303 const struct st_tracked_state st_update_geometry_texture = {
 304    update_geometry_textures                             /* update */
 305 };
 306
 307
 308 const struct st_tracked_state st_update_tessctrl_texture = {
 309    update_tessctrl_textures                             /* update */
 310 };
 311
 312
 313 const struct st_tracked_state st_update_tesseval_texture = {
 314    update_tesseval_textures                             /* update */
 315 };
 316
 317
 318 const struct st_tracked_state st_update_compute_texture = {
 319    update_compute_textures                              /* update */
 320 };