src/mesa/state_tracker/st_atom.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #include "main/glheader.h"
  30 #include "main/context.h"
  31
  32 #include "pipe/p_defines.h"
  33 #include "st_context.h"
  34 #include "st_atom.h"
  35 #include "st_cb_bitmap.h"
  36 #include "st_program.h"
  37 #include "st_manager.h"
  38
  39
  40 /**
  41  * This is used to initialize st->atoms[].
  42  */
  43 static const struct st_tracked_state *atoms[] =
  44 {
  45    &st_update_depth_stencil_alpha,
  46    &st_update_clip,
  47
  48    &st_finalize_textures,
  49    &st_update_fp,
  50    &st_update_gp,
  51    &st_update_vp,
  52
  53    &st_update_rasterizer,
  54    &st_update_polygon_stipple,
  55    &st_update_viewport,
  56    &st_update_scissor,
  57    &st_update_blend,
  58    &st_update_vertex_texture,
  59    &st_update_fragment_texture,
  60    &st_update_geometry_texture,
  61    &st_update_sampler, /* depends on update_*_texture for swizzle */
  62    &st_update_framebuffer,
  63    &st_update_msaa,
  64    &st_update_sample_shading,
  65    &st_update_vs_constants,
  66    &st_update_gs_constants,
  67    &st_update_fs_constants,
  68    &st_bind_vs_ubos,
  69    &st_bind_fs_ubos,
  70    &st_bind_gs_ubos,
  71    &st_update_pixel_transfer,
  72
  73    /* this must be done after the vertex program update */
  74    &st_update_array
  75 };
  76
  77
  78 void st_init_atoms( struct st_context *st )
  79 {
  80    /* no-op */
  81 }
  82
  83
  84 void st_destroy_atoms( struct st_context *st )
  85 {
  86    /* no-op */
  87 }
  88
  89
  90 /***********************************************************************
  91  */
  92
  93 static GLboolean check_state( const struct st_state_flags *a,
  94                               const struct st_state_flags *b )
  95 {
  96    return ((a->mesa & b->mesa) ||
  97            (a->st & b->st));
  98 }
  99
 100 static void accumulate_state( struct st_state_flags *a,
 101                               const struct st_state_flags *b )
 102 {
 103    a->mesa |= b->mesa;
 104    a->st |= b->st;
 105 }
 106
 107
 108 static void xor_states( struct st_state_flags *result,
 109                              const struct st_state_flags *a,
 110                               const struct st_state_flags *b )
 111 {
 112    result->mesa = a->mesa ^ b->mesa;
 113    result->st = a->st ^ b->st;
 114 }
 115
 116
 117 /* Too complex to figure out, just check every time:
 118  */
 119 static void check_program_state( struct st_context *st )
 120 {
 121    struct gl_context *ctx = st->ctx;
 122
 123    if (ctx->VertexProgram._Current != &st->vp->Base)
 124       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 125
 126    if (ctx->FragmentProgram._Current != &st->fp->Base)
 127       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 128
 129    if (ctx->GeometryProgram._Current != &st->gp->Base)
 130       st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;
 131 }
 132
 133 static void check_attrib_edgeflag(struct st_context *st)
 134 {
 135    const struct gl_client_array **arrays = st->ctx->Array._DrawArrays;
 136    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
 137
 138    if (!arrays)
 139       return;
 140
 141    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
 142                        st->ctx->Polygon.BackMode != GL_FILL;
 143
 144    vertdata_edgeflags = edgeflags_enabled &&
 145                         arrays[VERT_ATTRIB_EDGEFLAG]->StrideB != 0;
 146    if (vertdata_edgeflags != st->vertdata_edgeflags) {
 147       st->vertdata_edgeflags = vertdata_edgeflags;
 148       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 149    }
 150
 151    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
 152                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
 153    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
 154       st->edgeflag_culls_prims = edgeflag_culls_prims;
 155       st->dirty.st |= ST_NEW_RASTERIZER;
 156    }
 157 }
 158
 159
 160 /***********************************************************************
 161  * Update all derived state:
 162  */
 163
 164 void st_validate_state( struct st_context *st )
 165 {
 166    struct st_state_flags *state = &st->dirty;
 167    GLuint i;
 168
 169    /* Get Mesa driver state. */
 170    st->dirty.st |= st->ctx->NewDriverState;
 171    st->ctx->NewDriverState = 0;
 172
 173    check_attrib_edgeflag(st);
 174
 175    if (state->mesa)
 176       st_flush_bitmap_cache(st);
 177
 178    check_program_state( st );
 179
 180    st_manager_validate_framebuffers(st);
 181
 182    if (state->st == 0)
 183       return;
 184
 185    /*printf("%s %x/%x\n", __FUNCTION__, state->mesa, state->st);*/
 186
 187 #ifdef DEBUG
 188    if (1) {
 189 #else
 190    if (0) {
 191 #endif
 192       /* Debug version which enforces various sanity checks on the
 193        * state flags which are generated and checked to help ensure
 194        * state atoms are ordered correctly in the list.
 195        */
 196       struct st_state_flags examined, prev;
 197       memset(&examined, 0, sizeof(examined));
 198       prev = *state;
 199
 200       for (i = 0; i < Elements(atoms); i++) {
 201          const struct st_tracked_state *atom = atoms[i];
 202          struct st_state_flags generated;
 203
 204          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
 205
 206          if (!(atom->dirty.mesa || atom->dirty.st) ||
 207              !atom->update) {
 208             printf("malformed atom %s\n", atom->name);
 209             assert(0);
 210          }
 211
 212          if (check_state(state, &atom->dirty)) {
 213             atoms[i]->update( st );
 214             /*printf("after: %x\n", atom->dirty.mesa);*/
 215          }
 216
 217          accumulate_state(&examined, &atom->dirty);
 218
 219          /* generated = (prev ^ state)
 220           * if (examined & generated)
 221           *     fail;
 222           */
 223          xor_states(&generated, &prev, state);
 224          assert(!check_state(&examined, &generated));
 225          prev = *state;
 226       }
 227       /*printf("\n");*/
 228
 229    }
 230    else {
 231       for (i = 0; i < Elements(atoms); i++) {
 232          if (check_state(state, &atoms[i]->dirty))
 233             atoms[i]->update( st );
 234       }
 235    }
 236
 237    memset(state, 0, sizeof(*state));
 238 }
 239
 240
 241