src/mesa/state_tracker/st_atom_texture.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34
  35 #include "main/macros.h"
  36 #include "program/prog_instruction.h"
  37
  38 #include "st_context.h"
  39 #include "st_atom.h"
  40 #include "st_texture.h"
  41 #include "st_format.h"
  42 #include "st_cb_texture.h"
  43 #include "pipe/p_context.h"
  44 #include "util/u_inlines.h"
  45 #include "cso_cache/cso_context.h"
  46
  47 static boolean check_sampler_swizzle(struct pipe_sampler_view *sv,
  48                                    uint32_t _swizzle)
  49 {
  50    if ((sv->swizzle_r != GET_SWZ(_swizzle, 0)) ||
  51        (sv->swizzle_g != GET_SWZ(_swizzle, 1)) ||
  52        (sv->swizzle_b != GET_SWZ(_swizzle, 2)) ||
  53        (sv->swizzle_a != GET_SWZ(_swizzle, 3)))
  54       return true;
  55    return false;
  56 }
  57
  58 static INLINE struct pipe_sampler_view *
  59 st_create_texture_sampler_view_from_stobj(struct pipe_context *pipe,
  60                                           struct st_texture_object *stObj,
  61                                           enum pipe_format format)
  62
  63 {
  64    struct pipe_sampler_view templ;
  65
  66    u_sampler_view_default_template(&templ,
  67                                    stObj->pt,
  68                                    format);
  69
  70    if (stObj->base._Swizzle != SWIZZLE_NOOP) {
  71       templ.swizzle_r = GET_SWZ(stObj->base._Swizzle, 0);
  72       templ.swizzle_g = GET_SWZ(stObj->base._Swizzle, 1);
  73       templ.swizzle_b = GET_SWZ(stObj->base._Swizzle, 2);
  74       templ.swizzle_a = GET_SWZ(stObj->base._Swizzle, 3);
  75    }
  76
  77    return pipe->create_sampler_view(pipe, stObj->pt, &templ);
  78 }
  79
  80
  81 static INLINE struct pipe_sampler_view *
  82 st_get_texture_sampler_view_from_stobj(struct st_texture_object *stObj,
  83                                        struct pipe_context *pipe,
  84                                        enum pipe_format format)
  85
  86 {
  87    if (!stObj || !stObj->pt) {
  88       return NULL;
  89    }
  90
  91    if (!stObj->sampler_view) {
  92       stObj->sampler_view = st_create_texture_sampler_view_from_stobj(pipe, stObj, format);
  93    }
  94
  95    return stObj->sampler_view;
  96 }
  97
  98 static void
  99 update_textures(struct st_context *st)
 100 {
 101    struct pipe_context *pipe = st->pipe;
 102    struct gl_vertex_program *vprog = st->ctx->VertexProgram._Current;
 103    struct gl_fragment_program *fprog = st->ctx->FragmentProgram._Current;
 104    const GLbitfield samplersUsed = (vprog->Base.SamplersUsed |
 105                                     fprog->Base.SamplersUsed);
 106    GLuint su;
 107
 108    st->state.num_textures = 0;
 109
 110    /* loop over sampler units (aka tex image units) */
 111    for (su = 0; su < st->ctx->Const.MaxTextureImageUnits; su++) {
 112       struct pipe_sampler_view *sampler_view = NULL;
 113       enum pipe_format st_view_format;
 114       if (samplersUsed & (1 << su)) {
 115          struct gl_texture_object *texObj;
 116          struct st_texture_object *stObj;
 117          GLboolean retval;
 118          GLuint texUnit;
 119
 120          if (fprog->Base.SamplersUsed & (1 << su))
 121             texUnit = fprog->Base.SamplerUnits[su];
 122          else
 123             texUnit = vprog->Base.SamplerUnits[su];
 124
 125          texObj = st->ctx->Texture.Unit[texUnit]._Current;
 126
 127          if (!texObj) {
 128             texObj = st_get_default_texture(st);
 129          }
 130          stObj = st_texture_object(texObj);
 131
 132          retval = st_finalize_texture(st->ctx, st->pipe, texObj);
 133          if (!retval) {
 134             /* out of mem */
 135             continue;
 136          }
 137
 138          st_view_format = stObj->pt->format;
 139          {
 140             struct st_texture_image *firstImage;
 141             enum pipe_format firstImageFormat;
 142             firstImage = st_texture_image(stObj->base.Image[0][stObj->base.BaseLevel]);
 143
 144             firstImageFormat = st_mesa_format_to_pipe_format(firstImage->base.TexFormat);
 145             if (firstImageFormat != stObj->pt->format)
 146                st_view_format = firstImageFormat;
 147
 148          }
 149          st->state.num_textures = su + 1;
 150
 151          /* if sampler view has changed dereference it */
 152          if (stObj->sampler_view)
 153             if (check_sampler_swizzle(stObj->sampler_view, stObj->base._Swizzle) || (st_view_format != stObj->sampler_view->format))
 154                pipe_sampler_view_reference(&stObj->sampler_view, NULL);
 155
 156          sampler_view = st_get_texture_sampler_view_from_stobj(stObj, pipe, st_view_format);
 157       }
 158       pipe_sampler_view_reference(&st->state.sampler_views[su], sampler_view);
 159    }
 160
 161    cso_set_fragment_sampler_views(st->cso_context,
 162                                   st->state.num_textures,
 163                                   st->state.sampler_views);
 164    if (st->ctx->Const.MaxVertexTextureImageUnits > 0) {
 165       cso_set_vertex_sampler_views(st->cso_context,
 166                                    MIN2(st->state.num_textures,
 167                                         st->ctx->Const.MaxVertexTextureImageUnits),
 168                                    st->state.sampler_views);
 169    }
 170 }
 171
 172
 173 const struct st_tracked_state st_update_texture = {
 174    "st_update_texture",                                 /* name */
 175    {                                                    /* dirty */
 176       _NEW_TEXTURE,                                     /* mesa */
 177       ST_NEW_FRAGMENT_PROGRAM,                          /* st */
 178    },
 179    update_textures                                      /* update */
 180 };
 181
 182
 183
 184
 185 static void
 186 finalize_textures(struct st_context *st)
 187 {
 188    struct gl_fragment_program *fprog = st->ctx->FragmentProgram._Current;
 189    const GLboolean prev_missing_textures = st->missing_textures;
 190    GLuint su;
 191
 192    st->missing_textures = GL_FALSE;
 193
 194    for (su = 0; su < st->ctx->Const.MaxTextureCoordUnits; su++) {
 195       if (fprog->Base.SamplersUsed & (1 << su)) {
 196          const GLuint texUnit = fprog->Base.SamplerUnits[su];
 197          struct gl_texture_object *texObj
 198             = st->ctx->Texture.Unit[texUnit]._Current;
 199
 200          if (texObj) {
 201             GLboolean retval;
 202
 203             retval = st_finalize_texture(st->ctx, st->pipe, texObj);
 204             if (!retval) {
 205                /* out of mem */
 206                st->missing_textures = GL_TRUE;
 207                continue;
 208             }
 209          }
 210       }
 211    }
 212
 213    if (prev_missing_textures != st->missing_textures)
 214       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 215 }
 216
 217
 218
 219 const struct st_tracked_state st_finalize_textures = {
 220    "st_finalize_textures",              /* name */
 221    {                                    /* dirty */
 222       _NEW_TEXTURE,                     /* mesa */
 223       0,                                /* st */
 224    },
 225    finalize_textures                    /* update */
 226 };