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