src/mesa/state_tracker/st_atom.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #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_sampler,
  59    &st_update_vertex_texture,
  60    &st_update_texture,
  61    &st_update_framebuffer,
  62    &st_update_msaa,
  63    &st_update_vs_constants,
  64    &st_update_gs_constants,
  65    &st_update_fs_constants,
  66    &st_update_pixel_transfer,
  67
  68    /* this must be done after the vertex program update */
  69    &st_update_array
  70 };
  71
  72
  73 void st_init_atoms( struct st_context *st )
  74 {
  75    /* no-op */
  76 }
  77
  78
  79 void st_destroy_atoms( struct st_context *st )
  80 {
  81    /* no-op */
  82 }
  83
  84
  85 /***********************************************************************
  86  */
  87
  88 static GLboolean check_state( const struct st_state_flags *a,
  89                               const struct st_state_flags *b )
  90 {
  91    return ((a->mesa & b->mesa) ||
  92            (a->st & b->st));
  93 }
  94
  95 static void accumulate_state( struct st_state_flags *a,
  96                               const struct st_state_flags *b )
  97 {
  98    a->mesa |= b->mesa;
  99    a->st |= b->st;
 100 }
 101
 102
 103 static void xor_states( struct st_state_flags *result,
 104                              const struct st_state_flags *a,
 105                               const struct st_state_flags *b )
 106 {
 107    result->mesa = a->mesa ^ b->mesa;
 108    result->st = a->st ^ b->st;
 109 }
 110
 111
 112 /* Too complex to figure out, just check every time:
 113  */
 114 static void check_program_state( struct st_context *st )
 115 {
 116    struct gl_context *ctx = st->ctx;
 117
 118    if (ctx->VertexProgram._Current != &st->vp->Base)
 119       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 120
 121    if (ctx->FragmentProgram._Current != &st->fp->Base)
 122       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 123
 124    if (ctx->GeometryProgram._Current != &st->gp->Base)
 125       st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;
 126 }
 127
 128 static void check_attrib_edgeflag(struct st_context *st)
 129 {
 130    const struct gl_client_array **arrays = st->ctx->Array._DrawArrays;
 131    GLboolean vertDataEdgeFlags;
 132
 133    if (!arrays)
 134       return;
 135
 136    vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 137                        arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 138    if (vertDataEdgeFlags != st->vertdata_edgeflags) {
 139       st->vertdata_edgeflags = vertDataEdgeFlags;
 140       st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 141    }
 142 }
 143
 144
 145 /***********************************************************************
 146  * Update all derived state:
 147  */
 148
 149 void st_validate_state( struct st_context *st )
 150 {
 151    struct st_state_flags *state = &st->dirty;
 152    GLuint i;
 153
 154    /* Get Mesa driver state. */
 155    st->dirty.st |= st->ctx->NewDriverState;
 156    st->ctx->NewDriverState = 0;
 157
 158    check_attrib_edgeflag(st);
 159
 160    /* The bitmap cache is immune to pixel unpack changes.
 161     * Note that GLUT makes several calls to glPixelStore for each
 162     * bitmap char it draws so this is an important check.
 163     */
 164    if (state->mesa & ~_NEW_PACKUNPACK)
 165       st_flush_bitmap_cache(st);
 166
 167    check_program_state( st );
 168
 169    st_manager_validate_framebuffers(st);
 170
 171    if (state->st == 0)
 172       return;
 173
 174    /*printf("%s %x/%x\n", __FUNCTION__, state->mesa, state->st);*/
 175
 176 #ifdef DEBUG
 177    if (1) {
 178 #else
 179    if (0) {
 180 #endif
 181       /* Debug version which enforces various sanity checks on the
 182        * state flags which are generated and checked to help ensure
 183        * state atoms are ordered correctly in the list.
 184        */
 185       struct st_state_flags examined, prev;
 186       memset(&examined, 0, sizeof(examined));
 187       prev = *state;
 188
 189       for (i = 0; i < Elements(atoms); i++) {
 190          const struct st_tracked_state *atom = atoms[i];
 191          struct st_state_flags generated;
 192
 193          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
 194
 195          if (!(atom->dirty.mesa || atom->dirty.st) ||
 196              !atom->update) {
 197             printf("malformed atom %s\n", atom->name);
 198             assert(0);
 199          }
 200
 201          if (check_state(state, &atom->dirty)) {
 202             atoms[i]->update( st );
 203             /*printf("after: %x\n", atom->dirty.mesa);*/
 204          }
 205
 206          accumulate_state(&examined, &atom->dirty);
 207
 208          /* generated = (prev ^ state)
 209           * if (examined & generated)
 210           *     fail;
 211           */
 212          xor_states(&generated, &prev, state);
 213          assert(!check_state(&examined, &generated));
 214          prev = *state;
 215       }
 216       /*printf("\n");*/
 217
 218    }
 219    else {
 220       for (i = 0; i < Elements(atoms); i++) {
 221          if (check_state(state, &atoms[i]->dirty))
 222             atoms[i]->update( st );
 223       }
 224    }
 225
 226    memset(state, 0, sizeof(*state));
 227 }
 228
 229
 230