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 /**
  56  * Get a pipe_sampler_view object from a texture unit.
  57  */
  58 GLboolean
  59 st_update_single_texture(struct st_context *st,
  60                          struct pipe_sampler_view **sampler_view,
  61                          GLuint texUnit, unsigned glsl_version)
  62 {
  63    struct gl_context *ctx = st->ctx;
  64    const struct gl_sampler_object *samp;
  65    struct gl_texture_object *texObj;
  66    struct st_texture_object *stObj;
  67    GLboolean retval;
  68
  69    samp = _mesa_get_samplerobj(ctx, texUnit);
  70
  71    texObj = ctx->Texture.Unit[texUnit]._Current;
  72    assert(texObj);
  73
  74    stObj = st_texture_object(texObj);
  75
  76    retval = st_finalize_texture(ctx, st->pipe, texObj, 0);
  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    if (texObj->TargetIndex == TEXTURE_EXTERNAL_INDEX &&
  95        stObj->pt->screen->resource_changed)
  96          stObj->pt->screen->resource_changed(stObj->pt->screen, stObj->pt);
  97
  98    *sampler_view =
  99       st_get_texture_sampler_view_from_stobj(st, stObj, samp, glsl_version);
 100    return GL_TRUE;
 101 }
 102
 103
 104
 105 static void
 106 update_textures(struct st_context *st,
 107                 enum pipe_shader_type shader_stage,
 108                 const struct gl_program *prog,
 109                 struct pipe_sampler_view **sampler_views,
 110                 unsigned *num_textures)
 111 {
 112    const GLuint old_max = *num_textures;
 113    GLbitfield samplers_used = prog->SamplersUsed;
 114    GLbitfield free_slots = ~prog->SamplersUsed;
 115    GLbitfield external_samplers_used = prog->ExternalSamplersUsed;
 116    GLuint unit;
 117
 118    if (samplers_used == 0x0 && old_max == 0)
 119       return;
 120
 121    *num_textures = 0;
 122
 123    /* loop over sampler units (aka tex image units) */
 124    for (unit = 0; samplers_used || unit < old_max;
 125         unit++, samplers_used >>= 1) {
 126       struct pipe_sampler_view *sampler_view = NULL;
 127
 128       if (samplers_used & 1) {
 129          /* prog->sh.data is NULL if it's ARB_fragment_program */
 130          unsigned glsl_version = prog->sh.data ? prog->sh.data->Version : 0;
 131          const GLuint texUnit = prog->SamplerUnits[unit];
 132          GLboolean retval;
 133
 134          retval = st_update_single_texture(st, &sampler_view, texUnit,
 135                                            glsl_version);
 136          if (retval == GL_FALSE)
 137             continue;
 138
 139          *num_textures = unit + 1;
 140       }
 141
 142       pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
 143    }
 144
 145    /* For any external samplers with multiplaner YUV, stuff the additional
 146     * sampler views we need at the end.
 147     *
 148     * Trying to cache the sampler view in the stObj looks painful, so just
 149     * re-create the sampler view for the extra planes each time.  Main use
 150     * case is video playback (ie. fps games wouldn't be using this) so I
 151     * guess no point to try to optimize this feature.
 152     */
 153    while (unlikely(external_samplers_used)) {
 154       GLuint unit = u_bit_scan(&external_samplers_used);
 155       GLuint extra = 0;
 156       struct st_texture_object *stObj =
 157             st_get_texture_object(st->ctx, prog, unit);
 158       struct pipe_sampler_view tmpl;
 159
 160       if (!stObj)
 161          continue;
 162
 163       /* use original view as template: */
 164       tmpl = *sampler_views[unit];
 165
 166       switch (st_get_view_format(stObj)) {
 167       case PIPE_FORMAT_NV12:
 168          /* we need one additional R8G8 view: */
 169          tmpl.format = PIPE_FORMAT_RG88_UNORM;
 170          tmpl.swizzle_g = PIPE_SWIZZLE_Y;   /* tmpl from Y plane is R8 */
 171          extra = u_bit_scan(&free_slots);
 172          sampler_views[extra] =
 173                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 174          break;
 175       case PIPE_FORMAT_IYUV:
 176          /* we need two additional R8 views: */
 177          tmpl.format = PIPE_FORMAT_R8_UNORM;
 178          extra = u_bit_scan(&free_slots);
 179          sampler_views[extra] =
 180                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 181          extra = u_bit_scan(&free_slots);
 182          sampler_views[extra] =
 183                st->pipe->create_sampler_view(st->pipe, stObj->pt->next->next, &tmpl);
 184          break;
 185       default:
 186          break;
 187       }
 188
 189       *num_textures = MAX2(*num_textures, extra + 1);
 190    }
 191
 192    cso_set_sampler_views(st->cso_context,
 193                          shader_stage,
 194                          *num_textures,
 195                          sampler_views);
 196 }
 197
 198
 199
 200 void
 201 st_update_vertex_textures(struct st_context *st)
 202 {
 203    const struct gl_context *ctx = st->ctx;
 204
 205    if (ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits > 0) {
 206       update_textures(st,
 207                       PIPE_SHADER_VERTEX,
 208                       ctx->VertexProgram._Current,
 209                       st->state.sampler_views[PIPE_SHADER_VERTEX],
 210                       &st->state.num_sampler_views[PIPE_SHADER_VERTEX]);
 211    }
 212 }
 213
 214
 215 void
 216 st_update_fragment_textures(struct st_context *st)
 217 {
 218    const struct gl_context *ctx = st->ctx;
 219
 220    update_textures(st,
 221                    PIPE_SHADER_FRAGMENT,
 222                    ctx->FragmentProgram._Current,
 223                    st->state.sampler_views[PIPE_SHADER_FRAGMENT],
 224                    &st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
 225 }
 226
 227
 228 void
 229 st_update_geometry_textures(struct st_context *st)
 230 {
 231    const struct gl_context *ctx = st->ctx;
 232
 233    if (ctx->GeometryProgram._Current) {
 234       update_textures(st,
 235                       PIPE_SHADER_GEOMETRY,
 236                       ctx->GeometryProgram._Current,
 237                       st->state.sampler_views[PIPE_SHADER_GEOMETRY],
 238                       &st->state.num_sampler_views[PIPE_SHADER_GEOMETRY]);
 239    }
 240 }
 241
 242
 243 void
 244 st_update_tessctrl_textures(struct st_context *st)
 245 {
 246    const struct gl_context *ctx = st->ctx;
 247
 248    if (ctx->TessCtrlProgram._Current) {
 249       update_textures(st,
 250                       PIPE_SHADER_TESS_CTRL,
 251                       ctx->TessCtrlProgram._Current,
 252                       st->state.sampler_views[PIPE_SHADER_TESS_CTRL],
 253                       &st->state.num_sampler_views[PIPE_SHADER_TESS_CTRL]);
 254    }
 255 }
 256
 257
 258 void
 259 st_update_tesseval_textures(struct st_context *st)
 260 {
 261    const struct gl_context *ctx = st->ctx;
 262
 263    if (ctx->TessEvalProgram._Current) {
 264       update_textures(st,
 265                       PIPE_SHADER_TESS_EVAL,
 266                       ctx->TessEvalProgram._Current,
 267                       st->state.sampler_views[PIPE_SHADER_TESS_EVAL],
 268                       &st->state.num_sampler_views[PIPE_SHADER_TESS_EVAL]);
 269    }
 270 }
 271
 272
 273 void
 274 st_update_compute_textures(struct st_context *st)
 275 {
 276    const struct gl_context *ctx = st->ctx;
 277
 278    if (ctx->ComputeProgram._Current) {
 279       update_textures(st,
 280                       PIPE_SHADER_COMPUTE,
 281                       ctx->ComputeProgram._Current,
 282                       st->state.sampler_views[PIPE_SHADER_COMPUTE],
 283                       &st->state.num_sampler_views[PIPE_SHADER_COMPUTE]);
 284    }
 285 }