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_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_update_fp,
  49    &st_update_gp,
  50    &st_update_tep,
  51    &st_update_tcp,
  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_tessctrl_texture,
  63    &st_update_tesseval_texture,
  64    &st_update_sampler, /* depends on update_*_texture for swizzle */
  65    &st_update_framebuffer,
  66    &st_update_msaa,
  67    &st_update_sample_shading,
  68    &st_update_vs_constants,
  69    &st_update_tcs_constants,
  70    &st_update_tes_constants,
  71    &st_update_gs_constants,
  72    &st_update_fs_constants,
  73    &st_bind_vs_ubos,
  74    &st_bind_tcs_ubos,
  75    &st_bind_tes_ubos,
  76    &st_bind_fs_ubos,
  77    &st_bind_gs_ubos,
  78    &st_update_pixel_transfer,
  79    &st_update_tess,
  80
  81    /* this must be done after the vertex program update */
  82    &st_update_array
  83 };
  84
  85
  86 void st_init_atoms( struct st_context *st )
  87 {
  88    /* no-op */
  89 }
  90
  91
  92 void st_destroy_atoms( struct st_context *st )
  93 {
  94    /* no-op */
  95 }
  96
  97
  98 /***********************************************************************
  99  */
 100
 101 static GLboolean check_state( const struct st_state_flags *a,
 102                               const struct st_state_flags *b )
 103 {
 104    return ((a->mesa & b->mesa) ||
 105            (a->st & b->st));
 106 }
 107
 108 static void accumulate_state( struct st_state_flags *a,
 109                               const struct st_state_flags *b )
 110 {
 111    a->mesa |= b->mesa;
 112    a->st |= b->st;
 113 }
 114
 115
 116 static void xor_states( struct st_state_flags *result,
 117                              const struct st_state_flags *a,
 118                               const struct st_state_flags *b )
 119 {
 120    result->mesa = a->mesa ^ b->mesa;
 121    result->st = a->st ^ b->st;
 122 }
 123
 124
 125 /* Too complex to figure out, just check every time:
 126  */
 127 static void check_program_state( struct st_context *st )
 128 {
 129    struct gl_context *ctx = st->ctx;
 130
 131    if (ctx->VertexProgram._Current != &st->vp->Base)
 132       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 133
 134    if (ctx->FragmentProgram._Current != &st->fp->Base)
 135       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 136
 137    if (ctx->GeometryProgram._Current != &st->gp->Base)
 138       st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;
 139 }
 140
 141 static void check_attrib_edgeflag(struct st_context *st)
 142 {
 143    const struct gl_client_array **arrays = st->ctx->Array._DrawArrays;
 144    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
 145
 146    if (!arrays)
 147       return;
 148
 149    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
 150                        st->ctx->Polygon.BackMode != GL_FILL;
 151
 152    vertdata_edgeflags = edgeflags_enabled &&
 153                         arrays[VERT_ATTRIB_EDGEFLAG]->StrideB != 0;
 154    if (vertdata_edgeflags != st->vertdata_edgeflags) {
 155       st->vertdata_edgeflags = vertdata_edgeflags;
 156       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 157    }
 158
 159    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
 160                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
 161    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
 162       st->edgeflag_culls_prims = edgeflag_culls_prims;
 163       st->dirty.st |= ST_NEW_RASTERIZER;
 164    }
 165 }
 166
 167
 168 /***********************************************************************
 169  * Update all derived state:
 170  */
 171
 172 void st_validate_state( struct st_context *st )
 173 {
 174    struct st_state_flags *state = &st->dirty;
 175    GLuint i;
 176
 177    /* Get Mesa driver state. */
 178    st->dirty.st |= st->ctx->NewDriverState;
 179    st->ctx->NewDriverState = 0;
 180
 181    check_attrib_edgeflag(st);
 182
 183    check_program_state( st );
 184
 185    st_manager_validate_framebuffers(st);
 186
 187    if (state->st == 0 && state->mesa == 0)
 188       return;
 189
 190    /*printf("%s %x/%x\n", __func__, state->mesa, state->st);*/
 191
 192 #ifdef DEBUG
 193    if (1) {
 194 #else
 195    if (0) {
 196 #endif
 197       /* Debug version which enforces various sanity checks on the
 198        * state flags which are generated and checked to help ensure
 199        * state atoms are ordered correctly in the list.
 200        */
 201       struct st_state_flags examined, prev;
 202       memset(&examined, 0, sizeof(examined));
 203       prev = *state;
 204
 205       for (i = 0; i < ARRAY_SIZE(atoms); i++) {
 206          const struct st_tracked_state *atom = atoms[i];
 207          struct st_state_flags generated;
 208
 209          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
 210
 211          if (!(atom->dirty.mesa || atom->dirty.st) ||
 212              !atom->update) {
 213             printf("malformed atom %s\n", atom->name);
 214             assert(0);
 215          }
 216
 217          if (check_state(state, &atom->dirty)) {
 218             atoms[i]->update( st );
 219             /*printf("after: %x\n", atom->dirty.mesa);*/
 220          }
 221
 222          accumulate_state(&examined, &atom->dirty);
 223
 224          /* generated = (prev ^ state)
 225           * if (examined & generated)
 226           *     fail;
 227           */
 228          xor_states(&generated, &prev, state);
 229          assert(!check_state(&examined, &generated));
 230          prev = *state;
 231       }
 232       /*printf("\n");*/
 233
 234    }
 235    else {
 236       for (i = 0; i < ARRAY_SIZE(atoms); i++) {
 237          if (check_state(state, &atoms[i]->dirty))
 238             atoms[i]->update( st );
 239       }
 240    }
 241
 242    memset(state, 0, sizeof(*state));
 243 }
 244
 245
 246