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