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    struct gl_shader_program *shader =
 115       st->ctx->_Shader->CurrentProgram[mesa_shader];
 116    unsigned glsl_version = shader ? shader->Version : 0;
 117    enum pipe_shader_type shader_stage = st_shader_stage_to_ptarget(mesa_shader);
 118
 119    if (samplers_used == 0x0 && old_max == 0)
 120       return;
 121
 122    *num_textures = 0;
 123
 124    /* loop over sampler units (aka tex image units) */
 125    for (unit = 0; unit < max_units; unit++, samplers_used >>= 1) {
 126       struct pipe_sampler_view *sampler_view = NULL;
 127
 128       if (samplers_used & 1) {
 129          const GLuint texUnit = prog->SamplerUnits[unit];
 130          GLboolean retval;
 131
 132          retval = update_single_texture(st, &sampler_view, texUnit,
 133                                         glsl_version);
 134          if (retval == GL_FALSE)
 135             continue;
 136
 137          *num_textures = unit + 1;
 138       }
 139       else if (samplers_used == 0 && unit >= old_max) {
 140          /* if we've reset all the old views and we have no more new ones */
 141          break;
 142       }
 143
 144       pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
 145    }
 146
 147    /* For any external samplers with multiplaner YUV, stuff the additional
 148     * sampler views we need at the end.
 149     *
 150     * Trying to cache the sampler view in the stObj looks painful, so just
 151     * re-create the sampler view for the extra planes each time.  Main use
 152     * case is video playback (ie. fps games wouldn't be using this) so I
 153     * guess no point to try to optimize this feature.
 154     */
 155    while (unlikely(external_samplers_used)) {
 156       GLuint unit = u_bit_scan(&external_samplers_used);
 157       GLuint extra = 0;
 158       struct st_texture_object *stObj =
 159             st_get_texture_object(st->ctx, prog, unit);
 160       struct pipe_sampler_view tmpl;
 161
 162       if (!stObj)
 163          continue;
 164
 165       /* use original view as template: */
 166       tmpl = *sampler_views[unit];
 167
 168       switch (st_get_view_format(stObj)) {
 169       case PIPE_FORMAT_NV12:
 170          /* we need one additional R8G8 view: */
 171          tmpl.format = PIPE_FORMAT_RG88_UNORM;
 172          tmpl.swizzle_g = PIPE_SWIZZLE_Y;   /* tmpl from Y plane is R8 */
 173          extra = u_bit_scan(&free_slots);
 174          sampler_views[extra] =
 175                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 176          break;
 177       case PIPE_FORMAT_IYUV:
 178          /* we need two additional R8 views: */
 179          tmpl.format = PIPE_FORMAT_R8_UNORM;
 180          extra = u_bit_scan(&free_slots);
 181          sampler_views[extra] =
 182                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 183          extra = u_bit_scan(&free_slots);
 184          sampler_views[extra] =
 185                st->pipe->create_sampler_view(st->pipe, stObj->pt->next->next, &tmpl);
 186          break;
 187       default:
 188          break;
 189       }
 190
 191       *num_textures = MAX2(*num_textures, extra + 1);
 192    }
 193
 194    cso_set_sampler_views(st->cso_context,
 195                          shader_stage,
 196                          *num_textures,
 197                          sampler_views);
 198 }
 199
 200
 201
 202 static void
 203 update_vertex_textures(struct st_context *st)
 204 {
 205    const struct gl_context *ctx = st->ctx;
 206
 207    if (ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits > 0) {
 208       update_textures(st,
 209                       MESA_SHADER_VERTEX,
 210                       ctx->VertexProgram._Current,
 211                       ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits,
 212                       st->state.sampler_views[PIPE_SHADER_VERTEX],
 213                       &st->state.num_sampler_views[PIPE_SHADER_VERTEX]);
 214    }
 215 }
 216
 217
 218 static void
 219 update_fragment_textures(struct st_context *st)
 220 {
 221    const struct gl_context *ctx = st->ctx;
 222
 223    update_textures(st,
 224                    MESA_SHADER_FRAGMENT,
 225                    &ctx->FragmentProgram._Current->Base,
 226                    ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
 227                    st->state.sampler_views[PIPE_SHADER_FRAGMENT],
 228                    &st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
 229 }
 230
 231
 232 static void
 233 update_geometry_textures(struct st_context *st)
 234 {
 235    const struct gl_context *ctx = st->ctx;
 236
 237    if (ctx->GeometryProgram._Current) {
 238       update_textures(st,
 239                       MESA_SHADER_GEOMETRY,
 240                       ctx->GeometryProgram._Current,
 241                       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits,
 242                       st->state.sampler_views[PIPE_SHADER_GEOMETRY],
 243                       &st->state.num_sampler_views[PIPE_SHADER_GEOMETRY]);
 244    }
 245 }
 246
 247
 248 static void
 249 update_tessctrl_textures(struct st_context *st)
 250 {
 251    const struct gl_context *ctx = st->ctx;
 252
 253    if (ctx->TessCtrlProgram._Current) {
 254       update_textures(st,
 255                       MESA_SHADER_TESS_CTRL,
 256                       ctx->TessCtrlProgram._Current,
 257                       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits,
 258                       st->state.sampler_views[PIPE_SHADER_TESS_CTRL],
 259                       &st->state.num_sampler_views[PIPE_SHADER_TESS_CTRL]);
 260    }
 261 }
 262
 263
 264 static void
 265 update_tesseval_textures(struct st_context *st)
 266 {
 267    const struct gl_context *ctx = st->ctx;
 268
 269    if (ctx->TessEvalProgram._Current) {
 270       update_textures(st,
 271                       MESA_SHADER_TESS_EVAL,
 272                       ctx->TessEvalProgram._Current,
 273                       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits,
 274                       st->state.sampler_views[PIPE_SHADER_TESS_EVAL],
 275                       &st->state.num_sampler_views[PIPE_SHADER_TESS_EVAL]);
 276    }
 277 }
 278
 279
 280 static void
 281 update_compute_textures(struct st_context *st)
 282 {
 283    const struct gl_context *ctx = st->ctx;
 284
 285    if (ctx->ComputeProgram._Current) {
 286       update_textures(st,
 287                       MESA_SHADER_COMPUTE,
 288                       &ctx->ComputeProgram._Current->Base,
 289                       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits,
 290                       st->state.sampler_views[PIPE_SHADER_COMPUTE],
 291                       &st->state.num_sampler_views[PIPE_SHADER_COMPUTE]);
 292    }
 293 }
 294
 295
 296 const struct st_tracked_state st_update_fragment_texture = {
 297    update_fragment_textures                             /* update */
 298 };
 299
 300
 301 const struct st_tracked_state st_update_vertex_texture = {
 302    update_vertex_textures                               /* update */
 303 };
 304
 305
 306 const struct st_tracked_state st_update_geometry_texture = {
 307    update_geometry_textures                             /* update */
 308 };
 309
 310
 311 const struct st_tracked_state st_update_tessctrl_texture = {
 312    update_tessctrl_textures                             /* update */
 313 };
 314
 315
 316 const struct st_tracked_state st_update_tesseval_texture = {
 317    update_tesseval_textures                             /* update */
 318 };
 319
 320
 321 const struct st_tracked_state st_update_compute_texture = {
 322    update_compute_textures                              /* update */
 323 };