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 <stdio.h>
  30 #include "main/glheader.h"
  31 #include "main/context.h"
  32
  33 #include "pipe/p_defines.h"
  34 #include "st_context.h"
  35 #include "st_atom.h"
  36 #include "st_cb_bitmap.h"
  37 #include "st_program.h"
  38 #include "st_manager.h"
  39
  40
  41 /**
  42  * This is used to initialize st->atoms[].
  43  */
  44 static const struct st_tracked_state *atoms[] =
  45 {
  46    &st_update_depth_stencil_alpha,
  47    &st_update_clip,
  48
  49    &st_finalize_textures,
  50    &st_update_fp,
  51    &st_update_gp,
  52    &st_update_vp,
  53
  54    &st_update_rasterizer,
  55    &st_update_polygon_stipple,
  56    &st_update_viewport,
  57    &st_update_scissor,
  58    &st_update_blend,
  59    &st_update_vertex_texture,
  60    &st_update_fragment_texture,
  61    &st_update_geometry_texture,
  62    &st_update_sampler, /* depends on update_*_texture for swizzle */
  63    &st_update_framebuffer,
  64    &st_update_msaa,
  65    &st_update_sample_shading,
  66    &st_update_vs_constants,
  67    &st_update_gs_constants,
  68    &st_update_fs_constants,
  69    &st_bind_vs_ubos,
  70    &st_bind_fs_ubos,
  71    &st_bind_gs_ubos,
  72    &st_update_pixel_transfer,
  73
  74    /* this must be done after the vertex program update */
  75    &st_update_array
  76 };
  77
  78
  79 void st_init_atoms( struct st_context *st )
  80 {
  81    /* no-op */
  82 }
  83
  84
  85 void st_destroy_atoms( struct st_context *st )
  86 {
  87    /* no-op */
  88 }
  89
  90
  91 /***********************************************************************
  92  */
  93
  94 static GLboolean check_state( const struct st_state_flags *a,
  95                               const struct st_state_flags *b )
  96 {
  97    return ((a->mesa & b->mesa) ||
  98            (a->st & b->st));
  99 }
 100
 101 static void accumulate_state( struct st_state_flags *a,
 102                               const struct st_state_flags *b )
 103 {
 104    a->mesa |= b->mesa;
 105    a->st |= b->st;
 106 }
 107
 108
 109 static void xor_states( struct st_state_flags *result,
 110                              const struct st_state_flags *a,
 111                               const struct st_state_flags *b )
 112 {
 113    result->mesa = a->mesa ^ b->mesa;
 114    result->st = a->st ^ b->st;
 115 }
 116
 117
 118 /* Too complex to figure out, just check every time:
 119  */
 120 static void check_program_state( struct st_context *st )
 121 {
 122    struct gl_context *ctx = st->ctx;
 123
 124    if (ctx->VertexProgram._Current != &st->vp->Base)
 125       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 126
 127    if (ctx->FragmentProgram._Current != &st->fp->Base)
 128       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 129
 130    if (ctx->GeometryProgram._Current != &st->gp->Base)
 131       st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;
 132 }
 133
 134 static void check_attrib_edgeflag(struct st_context *st)
 135 {
 136    const struct gl_client_array **arrays = st->ctx->Array._DrawArrays;
 137    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
 138
 139    if (!arrays)
 140       return;
 141
 142    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
 143                        st->ctx->Polygon.BackMode != GL_FILL;
 144
 145    vertdata_edgeflags = edgeflags_enabled &&
 146                         arrays[VERT_ATTRIB_EDGEFLAG]->StrideB != 0;
 147    if (vertdata_edgeflags != st->vertdata_edgeflags) {
 148       st->vertdata_edgeflags = vertdata_edgeflags;
 149       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 150    }
 151
 152    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
 153                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
 154    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
 155       st->edgeflag_culls_prims = edgeflag_culls_prims;
 156       st->dirty.st |= ST_NEW_RASTERIZER;
 157    }
 158 }
 159
 160
 161 /***********************************************************************
 162  * Update all derived state:
 163  */
 164
 165 void st_validate_state( struct st_context *st )
 166 {
 167    struct st_state_flags *state = &st->dirty;
 168    GLuint i;
 169
 170    /* Get Mesa driver state. */
 171    st->dirty.st |= st->ctx->NewDriverState;
 172    st->ctx->NewDriverState = 0;
 173
 174    check_attrib_edgeflag(st);
 175
 176    if (state->mesa)
 177       st_flush_bitmap_cache(st);
 178
 179    check_program_state( st );
 180
 181    st_manager_validate_framebuffers(st);
 182
 183    if (state->st == 0)
 184       return;
 185
 186    /*printf("%s %x/%x\n", __FUNCTION__, state->mesa, state->st);*/
 187
 188 #ifdef DEBUG
 189    if (1) {
 190 #else
 191    if (0) {
 192 #endif
 193       /* Debug version which enforces various sanity checks on the
 194        * state flags which are generated and checked to help ensure
 195        * state atoms are ordered correctly in the list.
 196        */
 197       struct st_state_flags examined, prev;
 198       memset(&examined, 0, sizeof(examined));
 199       prev = *state;
 200
 201       for (i = 0; i < ARRAY_SIZE(atoms); i++) {
 202          const struct st_tracked_state *atom = atoms[i];
 203          struct st_state_flags generated;
 204
 205          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
 206
 207          if (!(atom->dirty.mesa || atom->dirty.st) ||
 208              !atom->update) {
 209             printf("malformed atom %s\n", atom->name);
 210             assert(0);
 211          }
 212
 213          if (check_state(state, &atom->dirty)) {
 214             atoms[i]->update( st );
 215             /*printf("after: %x\n", atom->dirty.mesa);*/
 216          }
 217
 218          accumulate_state(&examined, &atom->dirty);
 219
 220          /* generated = (prev ^ state)
 221           * if (examined & generated)
 222           *     fail;
 223           */
 224          xor_states(&generated, &prev, state);
 225          assert(!check_state(&examined, &generated));
 226          prev = *state;
 227       }
 228       /*printf("\n");*/
 229
 230    }
 231    else {
 232       for (i = 0; i < ARRAY_SIZE(atoms); i++) {
 233          if (check_state(state, &atoms[i]->dirty))
 234             atoms[i]->update( st );
 235       }
 236    }
 237
 238    memset(state, 0, sizeof(*state));
 239 }
 240
 241
 242