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_tep,
  53    &st_update_tcp,
  54    &st_update_vp,
  55
  56    &st_update_rasterizer,
  57    &st_update_polygon_stipple,
  58    &st_update_viewport,
  59    &st_update_scissor,
  60    &st_update_blend,
  61    &st_update_vertex_texture,
  62    &st_update_fragment_texture,
  63    &st_update_geometry_texture,
  64    &st_update_tessctrl_texture,
  65    &st_update_tesseval_texture,
  66    &st_update_sampler, /* depends on update_*_texture for swizzle */
  67    &st_update_framebuffer,
  68    &st_update_msaa,
  69    &st_update_sample_shading,
  70    &st_update_vs_constants,
  71    &st_update_tcs_constants,
  72    &st_update_tes_constants,
  73    &st_update_gs_constants,
  74    &st_update_fs_constants,
  75    &st_bind_vs_ubos,
  76    &st_bind_tcs_ubos,
  77    &st_bind_tes_ubos,
  78    &st_bind_fs_ubos,
  79    &st_bind_gs_ubos,
  80    &st_update_pixel_transfer,
  81    &st_update_tess,
  82
  83    /* this must be done after the vertex program update */
  84    &st_update_array
  85 };
  86
  87
  88 void st_init_atoms( struct st_context *st )
  89 {
  90    /* no-op */
  91 }
  92
  93
  94 void st_destroy_atoms( struct st_context *st )
  95 {
  96    /* no-op */
  97 }
  98
  99
 100 /***********************************************************************
 101  */
 102
 103 static GLboolean check_state( const struct st_state_flags *a,
 104                               const struct st_state_flags *b )
 105 {
 106    return ((a->mesa & b->mesa) ||
 107            (a->st & b->st));
 108 }
 109
 110 static void accumulate_state( struct st_state_flags *a,
 111                               const struct st_state_flags *b )
 112 {
 113    a->mesa |= b->mesa;
 114    a->st |= b->st;
 115 }
 116
 117
 118 static void xor_states( struct st_state_flags *result,
 119                              const struct st_state_flags *a,
 120                               const struct st_state_flags *b )
 121 {
 122    result->mesa = a->mesa ^ b->mesa;
 123    result->st = a->st ^ b->st;
 124 }
 125
 126
 127 /* Too complex to figure out, just check every time:
 128  */
 129 static void check_program_state( struct st_context *st )
 130 {
 131    struct gl_context *ctx = st->ctx;
 132
 133    if (ctx->VertexProgram._Current != &st->vp->Base)
 134       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 135
 136    if (ctx->FragmentProgram._Current != &st->fp->Base)
 137       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 138
 139    if (ctx->GeometryProgram._Current != &st->gp->Base)
 140       st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;
 141 }
 142
 143 static void check_attrib_edgeflag(struct st_context *st)
 144 {
 145    const struct gl_client_array **arrays = st->ctx->Array._DrawArrays;
 146    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
 147
 148    if (!arrays)
 149       return;
 150
 151    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
 152                        st->ctx->Polygon.BackMode != GL_FILL;
 153
 154    vertdata_edgeflags = edgeflags_enabled &&
 155                         arrays[VERT_ATTRIB_EDGEFLAG]->StrideB != 0;
 156    if (vertdata_edgeflags != st->vertdata_edgeflags) {
 157       st->vertdata_edgeflags = vertdata_edgeflags;
 158       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 159    }
 160
 161    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
 162                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
 163    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
 164       st->edgeflag_culls_prims = edgeflag_culls_prims;
 165       st->dirty.st |= ST_NEW_RASTERIZER;
 166    }
 167 }
 168
 169
 170 /***********************************************************************
 171  * Update all derived state:
 172  */
 173
 174 void st_validate_state( struct st_context *st )
 175 {
 176    struct st_state_flags *state = &st->dirty;
 177    GLuint i;
 178
 179    /* Get Mesa driver state. */
 180    st->dirty.st |= st->ctx->NewDriverState;
 181    st->ctx->NewDriverState = 0;
 182
 183    check_attrib_edgeflag(st);
 184
 185    if (state->mesa)
 186       st_flush_bitmap_cache(st);
 187
 188    check_program_state( st );
 189
 190    st_manager_validate_framebuffers(st);
 191
 192    if (state->st == 0)
 193       return;
 194
 195    /*printf("%s %x/%x\n", __func__, state->mesa, state->st);*/
 196
 197 #ifdef DEBUG
 198    if (1) {
 199 #else
 200    if (0) {
 201 #endif
 202       /* Debug version which enforces various sanity checks on the
 203        * state flags which are generated and checked to help ensure
 204        * state atoms are ordered correctly in the list.
 205        */
 206       struct st_state_flags examined, prev;
 207       memset(&examined, 0, sizeof(examined));
 208       prev = *state;
 209
 210       for (i = 0; i < ARRAY_SIZE(atoms); i++) {
 211          const struct st_tracked_state *atom = atoms[i];
 212          struct st_state_flags generated;
 213
 214          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
 215
 216          if (!(atom->dirty.mesa || atom->dirty.st) ||
 217              !atom->update) {
 218             printf("malformed atom %s\n", atom->name);
 219             assert(0);
 220          }
 221
 222          if (check_state(state, &atom->dirty)) {
 223             atoms[i]->update( st );
 224             /*printf("after: %x\n", atom->dirty.mesa);*/
 225          }
 226
 227          accumulate_state(&examined, &atom->dirty);
 228
 229          /* generated = (prev ^ state)
 230           * if (examined & generated)
 231           *     fail;
 232           */
 233          xor_states(&generated, &prev, state);
 234          assert(!check_state(&examined, &generated));
 235          prev = *state;
 236       }
 237       /*printf("\n");*/
 238
 239    }
 240    else {
 241       for (i = 0; i < ARRAY_SIZE(atoms); i++) {
 242          if (check_state(state, &atoms[i]->dirty))
 243             atoms[i]->update( st );
 244       }
 245    }
 246
 247    memset(state, 0, sizeof(*state));
 248 }
 249
 250
 251