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 void
  59 st_update_single_texture(struct st_context *st,
  60                          struct pipe_sampler_view **sampler_view,
  61                          GLuint texUnit, bool glsl130_or_later)
  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
  68    samp = _mesa_get_samplerobj(ctx, texUnit);
  69
  70    texObj = ctx->Texture.Unit[texUnit]._Current;
  71    assert(texObj);
  72
  73    stObj = st_texture_object(texObj);
  74
  75    if (unlikely(texObj->Target == GL_TEXTURE_BUFFER)) {
  76       *sampler_view = st_get_buffer_sampler_view_from_stobj(st, stObj);
  77       return;
  78    }
  79
  80    if (!st_finalize_texture(ctx, st->pipe, texObj, 0) ||
  81        !stObj->pt) {
  82       /* out of mem */
  83       *sampler_view = NULL;
  84       return;
  85    }
  86
  87    if (texObj->TargetIndex == TEXTURE_EXTERNAL_INDEX &&
  88        stObj->pt->screen->resource_changed)
  89          stObj->pt->screen->resource_changed(stObj->pt->screen, stObj->pt);
  90
  91    *sampler_view =
  92       st_get_texture_sampler_view_from_stobj(st, stObj, samp,
  93                                              glsl130_or_later);
  94 }
  95
  96
  97
  98 static void
  99 update_textures(struct st_context *st,
 100                 enum pipe_shader_type shader_stage,
 101                 const struct gl_program *prog,
 102                 struct pipe_sampler_view **sampler_views,
 103                 unsigned *out_num_textures)
 104 {
 105    const GLuint old_max = *out_num_textures;
 106    GLbitfield samplers_used = prog->SamplersUsed;
 107    GLbitfield free_slots = ~prog->SamplersUsed;
 108    GLbitfield external_samplers_used = prog->ExternalSamplersUsed;
 109    GLuint unit;
 110
 111    if (samplers_used == 0x0 && old_max == 0)
 112       return;
 113
 114    unsigned num_textures = 0;
 115
 116    /* prog->sh.data is NULL if it's ARB_fragment_program */
 117    bool glsl130 = (prog->sh.data ? prog->sh.data->Version : 0) >= 130;
 118
 119    /* loop over sampler units (aka tex image units) */
 120    for (unit = 0; samplers_used || unit < old_max;
 121         unit++, samplers_used >>= 1) {
 122       struct pipe_sampler_view *sampler_view = NULL;
 123
 124       if (samplers_used & 1) {
 125          const GLuint texUnit = prog->SamplerUnits[unit];
 126
 127          st_update_single_texture(st, &sampler_view, texUnit, glsl130);
 128          num_textures = unit + 1;
 129       }
 130
 131       pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
 132    }
 133
 134    /* For any external samplers with multiplaner YUV, stuff the additional
 135     * sampler views we need at the end.
 136     *
 137     * Trying to cache the sampler view in the stObj looks painful, so just
 138     * re-create the sampler view for the extra planes each time.  Main use
 139     * case is video playback (ie. fps games wouldn't be using this) so I
 140     * guess no point to try to optimize this feature.
 141     */
 142    while (unlikely(external_samplers_used)) {
 143       GLuint unit = u_bit_scan(&external_samplers_used);
 144       GLuint extra = 0;
 145       struct st_texture_object *stObj =
 146             st_get_texture_object(st->ctx, prog, unit);
 147       struct pipe_sampler_view tmpl;
 148
 149       if (!stObj)
 150          continue;
 151
 152       /* use original view as template: */
 153       tmpl = *sampler_views[unit];
 154
 155       switch (st_get_view_format(stObj)) {
 156       case PIPE_FORMAT_NV12:
 157          /* we need one additional R8G8 view: */
 158          tmpl.format = PIPE_FORMAT_RG88_UNORM;
 159          tmpl.swizzle_g = PIPE_SWIZZLE_Y;   /* tmpl from Y plane is R8 */
 160          extra = u_bit_scan(&free_slots);
 161          sampler_views[extra] =
 162                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 163          break;
 164       case PIPE_FORMAT_IYUV:
 165          /* we need two additional R8 views: */
 166          tmpl.format = PIPE_FORMAT_R8_UNORM;
 167          extra = u_bit_scan(&free_slots);
 168          sampler_views[extra] =
 169                st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
 170          extra = u_bit_scan(&free_slots);
 171          sampler_views[extra] =
 172                st->pipe->create_sampler_view(st->pipe, stObj->pt->next->next, &tmpl);
 173          break;
 174       default:
 175          break;
 176       }
 177
 178       num_textures = MAX2(num_textures, extra + 1);
 179    }
 180
 181    cso_set_sampler_views(st->cso_context,
 182                          shader_stage,
 183                          num_textures,
 184                          sampler_views);
 185    *out_num_textures = num_textures;
 186 }
 187
 188
 189
 190 void
 191 st_update_vertex_textures(struct st_context *st)
 192 {
 193    const struct gl_context *ctx = st->ctx;
 194
 195    if (ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits > 0) {
 196       update_textures(st,
 197                       PIPE_SHADER_VERTEX,
 198                       ctx->VertexProgram._Current,
 199                       st->state.sampler_views[PIPE_SHADER_VERTEX],
 200                       &st->state.num_sampler_views[PIPE_SHADER_VERTEX]);
 201    }
 202 }
 203
 204
 205 void
 206 st_update_fragment_textures(struct st_context *st)
 207 {
 208    const struct gl_context *ctx = st->ctx;
 209
 210    update_textures(st,
 211                    PIPE_SHADER_FRAGMENT,
 212                    ctx->FragmentProgram._Current,
 213                    st->state.sampler_views[PIPE_SHADER_FRAGMENT],
 214                    &st->state.num_sampler_views[PIPE_SHADER_FRAGMENT]);
 215 }
 216
 217
 218 void
 219 st_update_geometry_textures(struct st_context *st)
 220 {
 221    const struct gl_context *ctx = st->ctx;
 222
 223    if (ctx->GeometryProgram._Current) {
 224       update_textures(st,
 225                       PIPE_SHADER_GEOMETRY,
 226                       ctx->GeometryProgram._Current,
 227                       st->state.sampler_views[PIPE_SHADER_GEOMETRY],
 228                       &st->state.num_sampler_views[PIPE_SHADER_GEOMETRY]);
 229    }
 230 }
 231
 232
 233 void
 234 st_update_tessctrl_textures(struct st_context *st)
 235 {
 236    const struct gl_context *ctx = st->ctx;
 237
 238    if (ctx->TessCtrlProgram._Current) {
 239       update_textures(st,
 240                       PIPE_SHADER_TESS_CTRL,
 241                       ctx->TessCtrlProgram._Current,
 242                       st->state.sampler_views[PIPE_SHADER_TESS_CTRL],
 243                       &st->state.num_sampler_views[PIPE_SHADER_TESS_CTRL]);
 244    }
 245 }
 246
 247
 248 void
 249 st_update_tesseval_textures(struct st_context *st)
 250 {
 251    const struct gl_context *ctx = st->ctx;
 252
 253    if (ctx->TessEvalProgram._Current) {
 254       update_textures(st,
 255                       PIPE_SHADER_TESS_EVAL,
 256                       ctx->TessEvalProgram._Current,
 257                       st->state.sampler_views[PIPE_SHADER_TESS_EVAL],
 258                       &st->state.num_sampler_views[PIPE_SHADER_TESS_EVAL]);
 259    }
 260 }
 261
 262
 263 void
 264 st_update_compute_textures(struct st_context *st)
 265 {
 266    const struct gl_context *ctx = st->ctx;
 267
 268    if (ctx->ComputeProgram._Current) {
 269       update_textures(st,
 270                       PIPE_SHADER_COMPUTE,
 271                       ctx->ComputeProgram._Current,
 272                       st->state.sampler_views[PIPE_SHADER_COMPUTE],
 273                       &st->state.num_sampler_views[PIPE_SHADER_COMPUTE]);
 274    }
 275 }