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          /* prog->sh.data is NULL if it's ARB_fragment_program */
 127          unsigned glsl_version = prog->sh.data ? prog->sh.data->Version : 0;
 128          const GLuint texUnit = prog->SamplerUnits[unit];
 129          GLboolean retval;
 130
 131          retval = update_single_texture(st, &sampler_view, texUnit,
 132                                         glsl_version);
 133          if (retval == GL_FALSE)
 134             continue;
 135
 136          *num_textures = unit + 1;
 137       }
 138       else if (samplers_used == 0 && unit >= old_max) {
 139          /* if we've reset all the old views and we have no more new ones */
 140          break;
 141       }
 142
 143       pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
 144    }
 145
 146    /* For any external samplers with multiplaner YUV, stuff the additional
 147     * sampler views we need at the end.
 148     *
 149     * Trying to cache the sampler view in the stObj looks painful, so just
 150     * re-create the sampler view for the extra planes each time.  Main use
 151     * case is video playback (ie. fps games wouldn't be using this) so I
 152     * guess no point to try to optimize this feature.
 153     */
 154    while (unlikely(external_samplers_used)) {
 155       GLuint unit = u_bit_scan(&external_samplers_used);
 156       GLuint extra = 0;
 157       struct st_texture_object *stObj =
 158             st_get_texture_object(st->ctx, prog, unit);
 159       struct pipe_sampler_view tmpl;
 160
 161       if (!stObj)
 162          continue;
 163
 164       /* use original view as template: */
 165       tmpl = *sampler_views[unit];
 166
 167       switch (st_get_view_format(stObj)) {
 168       case PIPE_FORMAT_NV12:
 169          /* we need one additional R8G8 view: */
 170          tmpl.format = PIPE_FORMAT_RG88_UNORM;
 171          tmpl.swizzle_g = PIPE_SWIZZLE_Y;   /* tmpl from Y plane is R8 */
 172          extra = u_bit_scan(&free_slots);
 173          sampler_views[extra] =
 174                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 175          break;
 176       case PIPE_FORMAT_IYUV:
 177          /* we need two additional R8 views: */
 178          tmpl.format = PIPE_FORMAT_R8_UNORM;
 179          extra = u_bit_scan(&free_slots);
 180          sampler_views[extra] =
 181                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 182          extra = u_bit_scan(&free_slots);
 183          sampler_views[extra] =
 184                st->pipe->create_sampler_view(st->pipe, stObj->pt->next->next, &tmpl);
 185          break;
 186       default:
 187          break;
 188       }
 189
 190       *num_textures = MAX2(*num_textures, extra + 1);
 191    }
 192
 193    cso_set_sampler_views(st->cso_context,
 194                          shader_stage,
 195                          *num_textures,
 196                          sampler_views);
 197 }
 198
 199
 200
 201 static void
 202 update_vertex_textures(struct st_context *st)
 203 {
 204    const struct gl_context *ctx = st->ctx;
 205
 206    if (ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits > 0) {
 207       update_textures(st,
 208                       MESA_SHADER_VERTEX,
 209                       ctx->VertexProgram._Current,
 210                       ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits,
 211                       st->state.sampler_views[PIPE_SHADER_VERTEX],
 212                       &st->state.num_sampler_views[PIPE_SHADER_VERTEX]);
 213    }
 214 }
 215
 216
 217 static void
 218 update_fragment_textures(struct st_context *st)
 219 {
 220    const struct gl_context *ctx = st->ctx;
 221
 222    update_textures(st,
 223                    MESA_SHADER_FRAGMENT,
 224                    ctx->FragmentProgram._Current,
 225                    ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
 226                    st->state.sampler_views[PIPE_SHADER_FRAGMENT],
 227                    &st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
 228 }
 229
 230
 231 static void
 232 update_geometry_textures(struct st_context *st)
 233 {
 234    const struct gl_context *ctx = st->ctx;
 235
 236    if (ctx->GeometryProgram._Current) {
 237       update_textures(st,
 238                       MESA_SHADER_GEOMETRY,
 239                       ctx->GeometryProgram._Current,
 240                       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits,
 241                       st->state.sampler_views[PIPE_SHADER_GEOMETRY],
 242                       &st->state.num_sampler_views[PIPE_SHADER_GEOMETRY]);
 243    }
 244 }
 245
 246
 247 static void
 248 update_tessctrl_textures(struct st_context *st)
 249 {
 250    const struct gl_context *ctx = st->ctx;
 251
 252    if (ctx->TessCtrlProgram._Current) {
 253       update_textures(st,
 254                       MESA_SHADER_TESS_CTRL,
 255                       ctx->TessCtrlProgram._Current,
 256                       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits,
 257                       st->state.sampler_views[PIPE_SHADER_TESS_CTRL],
 258                       &st->state.num_sampler_views[PIPE_SHADER_TESS_CTRL]);
 259    }
 260 }
 261
 262
 263 static void
 264 update_tesseval_textures(struct st_context *st)
 265 {
 266    const struct gl_context *ctx = st->ctx;
 267
 268    if (ctx->TessEvalProgram._Current) {
 269       update_textures(st,
 270                       MESA_SHADER_TESS_EVAL,
 271                       ctx->TessEvalProgram._Current,
 272                       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits,
 273                       st->state.sampler_views[PIPE_SHADER_TESS_EVAL],
 274                       &st->state.num_sampler_views[PIPE_SHADER_TESS_EVAL]);
 275    }
 276 }
 277
 278
 279 static void
 280 update_compute_textures(struct st_context *st)
 281 {
 282    const struct gl_context *ctx = st->ctx;
 283
 284    if (ctx->ComputeProgram._Current) {
 285       update_textures(st,
 286                       MESA_SHADER_COMPUTE,
 287                       ctx->ComputeProgram._Current,
 288                       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits,
 289                       st->state.sampler_views[PIPE_SHADER_COMPUTE],
 290                       &st->state.num_sampler_views[PIPE_SHADER_COMPUTE]);
 291    }
 292 }
 293
 294
 295 const struct st_tracked_state st_update_fragment_texture = {
 296    update_fragment_textures                             /* update */
 297 };
 298
 299
 300 const struct st_tracked_state st_update_vertex_texture = {
 301    update_vertex_textures                               /* update */
 302 };
 303
 304
 305 const struct st_tracked_state st_update_geometry_texture = {
 306    update_geometry_textures                             /* update */
 307 };
 308
 309
 310 const struct st_tracked_state st_update_tessctrl_texture = {
 311    update_tessctrl_textures                             /* update */
 312 };
 313
 314
 315 const struct st_tracked_state st_update_tesseval_texture = {
 316    update_tesseval_textures                             /* update */
 317 };
 318
 319
 320 const struct st_tracked_state st_update_compute_texture = {
 321    update_compute_textures                              /* update */
 322 };