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 #include "pipe/p_context.h"
  40
  41
  42 /**
  43  * This is used to initialize st->atoms[].
  44  */
  45 static const struct st_tracked_state *atoms[] =
  46 {
  47    &st_update_depth_stencil_alpha,
  48    &st_update_clip,
  49
  50    &st_finalize_textures,
  51    &st_update_fp,
  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_sampler,
  60    &st_update_texture,
  61    &st_update_framebuffer,
  62    &st_update_vs_constants,
  63    &st_update_fs_constants,
  64    &st_update_pixel_transfer
  65 };
  66
  67
  68 void st_init_atoms( struct st_context *st )
  69 {
  70    /* no-op */
  71 }
  72
  73
  74 void st_destroy_atoms( struct st_context *st )
  75 {
  76    /* no-op */
  77 }
  78
  79
  80 /***********************************************************************
  81  */
  82
  83 static GLboolean check_state( const struct st_state_flags *a,
  84                               const struct st_state_flags *b )
  85 {
  86    return ((a->mesa & b->mesa) ||
  87            (a->st & b->st));
  88 }
  89
  90 static void accumulate_state( struct st_state_flags *a,
  91                               const struct st_state_flags *b )
  92 {
  93    a->mesa |= b->mesa;
  94    a->st |= b->st;
  95 }
  96
  97
  98 static void xor_states( struct st_state_flags *result,
  99                              const struct st_state_flags *a,
 100                               const struct st_state_flags *b )
 101 {
 102    result->mesa = a->mesa ^ b->mesa;
 103    result->st = a->st ^ b->st;
 104 }
 105
 106
 107 /* Too complex to figure out, just check every time:
 108  */
 109 static void check_program_state( struct st_context *st )
 110 {
 111    GLcontext *ctx = st->ctx;
 112
 113    if (ctx->VertexProgram._Current != &st->vp->Base)
 114       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 115
 116    if (ctx->FragmentProgram._Current != &st->fp->Base)
 117       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 118
 119 }
 120
 121
 122 /***********************************************************************
 123  * Update all derived state:
 124  */
 125
 126 void st_validate_state( struct st_context *st )
 127 {
 128    struct st_state_flags *state = &st->dirty;
 129    GLuint i;
 130
 131    /* The bitmap cache is immune to pixel unpack changes.
 132     * Note that GLUT makes several calls to glPixelStore for each
 133     * bitmap char it draws so this is an important check.
 134     */
 135    if (state->mesa & ~_NEW_PACKUNPACK)
 136       st_flush_bitmap_cache(st);
 137
 138    check_program_state( st );
 139
 140    st_manager_validate_framebuffers(st);
 141
 142    if (state->st == 0)
 143       return;
 144
 145    /*printf("%s %x/%x\n", __FUNCTION__, state->mesa, state->st);*/
 146
 147    if (1) {
 148       /* Debug version which enforces various sanity checks on the
 149        * state flags which are generated and checked to help ensure
 150        * state atoms are ordered correctly in the list.
 151        */
 152       struct st_state_flags examined, prev;
 153       memset(&examined, 0, sizeof(examined));
 154       prev = *state;
 155
 156       for (i = 0; i < Elements(atoms); i++) {
 157          const struct st_tracked_state *atom = atoms[i];
 158          struct st_state_flags generated;
 159
 160          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
 161
 162          if (!(atom->dirty.mesa || atom->dirty.st) ||
 163              !atom->update) {
 164             printf("malformed atom %s\n", atom->name);
 165             assert(0);
 166          }
 167
 168          if (check_state(state, &atom->dirty)) {
 169             atoms[i]->update( st );
 170             /*printf("after: %x\n", atom->dirty.mesa);*/
 171          }
 172
 173          accumulate_state(&examined, &atom->dirty);
 174
 175          /* generated = (prev ^ state)
 176           * if (examined & generated)
 177           *     fail;
 178           */
 179          xor_states(&generated, &prev, state);
 180          assert(!check_state(&examined, &generated));
 181          prev = *state;
 182       }
 183       /*printf("\n");*/
 184
 185    }
 186    else {
 187       for (i = 0; i < Elements(atoms); i++) {
 188          if (check_state(state, &atoms[i]->dirty))
 189             atoms[i]->update( st );
 190       }
 191    }
 192
 193    memset(state, 0, sizeof(*state));
 194 }
 195
 196
 197