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_fragment_texture,
  61    &st_update_geometry_texture,
  62    &st_update_framebuffer,
  63    &st_update_msaa,
  64    &st_update_vs_constants,
  65    &st_update_gs_constants,
  66    &st_update_fs_constants,
  67    &st_bind_vs_ubos,
  68    &st_bind_fs_ubos,
  69    &st_update_pixel_transfer,
  70
  71    /* this must be done after the vertex program update */
  72    &st_update_array
  73 };
  74
  75
  76 void st_init_atoms( struct st_context *st )
  77 {
  78    /* no-op */
  79 }
  80
  81
  82 void st_destroy_atoms( struct st_context *st )
  83 {
  84    /* no-op */
  85 }
  86
  87
  88 /***********************************************************************
  89  */
  90
  91 static GLboolean check_state( const struct st_state_flags *a,
  92                               const struct st_state_flags *b )
  93 {
  94    return ((a->mesa & b->mesa) ||
  95            (a->st & b->st));
  96 }
  97
  98 static void accumulate_state( struct st_state_flags *a,
  99                               const struct st_state_flags *b )
 100 {
 101    a->mesa |= b->mesa;
 102    a->st |= b->st;
 103 }
 104
 105
 106 static void xor_states( struct st_state_flags *result,
 107                              const struct st_state_flags *a,
 108                               const struct st_state_flags *b )
 109 {
 110    result->mesa = a->mesa ^ b->mesa;
 111    result->st = a->st ^ b->st;
 112 }
 113
 114
 115 /* Too complex to figure out, just check every time:
 116  */
 117 static void check_program_state( struct st_context *st )
 118 {
 119    struct gl_context *ctx = st->ctx;
 120
 121    if (ctx->VertexProgram._Current != &st->vp->Base)
 122       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
 123
 124    if (ctx->FragmentProgram._Current != &st->fp->Base)
 125       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 126
 127    if (ctx->GeometryProgram._Current != &st->gp->Base)
 128       st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;
 129 }
 130
 131 static void check_attrib_edgeflag(struct st_context *st)
 132 {
 133    const struct gl_client_array **arrays = st->ctx->Array._DrawArrays;
 134    GLboolean vertDataEdgeFlags;
 135
 136    if (!arrays)
 137       return;
 138
 139    vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 140                        arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 141    if (vertDataEdgeFlags != st->vertdata_edgeflags) {
 142       st->vertdata_edgeflags = vertDataEdgeFlags;
 143       st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 144    }
 145 }
 146
 147
 148 /***********************************************************************
 149  * Update all derived state:
 150  */
 151
 152 void st_validate_state( struct st_context *st )
 153 {
 154    struct st_state_flags *state = &st->dirty;
 155    GLuint i;
 156
 157    /* Get Mesa driver state. */
 158    st->dirty.st |= st->ctx->NewDriverState;
 159    st->ctx->NewDriverState = 0;
 160
 161    check_attrib_edgeflag(st);
 162
 163    /* The bitmap cache is immune to pixel unpack changes.
 164     * Note that GLUT makes several calls to glPixelStore for each
 165     * bitmap char it draws so this is an important check.
 166     */
 167    if (state->mesa & ~_NEW_PACKUNPACK)
 168       st_flush_bitmap_cache(st);
 169
 170    check_program_state( st );
 171
 172    st_manager_validate_framebuffers(st);
 173
 174    if (state->st == 0)
 175       return;
 176
 177    /*printf("%s %x/%x\n", __FUNCTION__, state->mesa, state->st);*/
 178
 179 #ifdef DEBUG
 180    if (1) {
 181 #else
 182    if (0) {
 183 #endif
 184       /* Debug version which enforces various sanity checks on the
 185        * state flags which are generated and checked to help ensure
 186        * state atoms are ordered correctly in the list.
 187        */
 188       struct st_state_flags examined, prev;
 189       memset(&examined, 0, sizeof(examined));
 190       prev = *state;
 191
 192       for (i = 0; i < Elements(atoms); i++) {
 193          const struct st_tracked_state *atom = atoms[i];
 194          struct st_state_flags generated;
 195
 196          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
 197
 198          if (!(atom->dirty.mesa || atom->dirty.st) ||
 199              !atom->update) {
 200             printf("malformed atom %s\n", atom->name);
 201             assert(0);
 202          }
 203
 204          if (check_state(state, &atom->dirty)) {
 205             atoms[i]->update( st );
 206             /*printf("after: %x\n", atom->dirty.mesa);*/
 207          }
 208
 209          accumulate_state(&examined, &atom->dirty);
 210
 211          /* generated = (prev ^ state)
 212           * if (examined & generated)
 213           *     fail;
 214           */
 215          xor_states(&generated, &prev, state);
 216          assert(!check_state(&examined, &generated));
 217          prev = *state;
 218       }
 219       /*printf("\n");*/
 220
 221    }
 222    else {
 223       for (i = 0; i < Elements(atoms); i++) {
 224          if (check_state(state, &atoms[i]->dirty))
 225             atoms[i]->update( st );
 226       }
 227    }
 228
 229    memset(state, 0, sizeof(*state));
 230 }
 231
 232
 233