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  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_cb_bitmap.h"
  37. #include "st_program.h"
  38. #include "st_manager.h"
  39.  
  40.  
  41. /**
  42.  * This is used to initialize st->atoms[].
  43.  */
  44. static const struct st_tracked_state *atoms[] =
  45. {
  46.    &st_update_depth_stencil_alpha,
  47.    &st_update_clip,
  48.  
  49.    &st_finalize_textures,
  50.    &st_update_fp,
  51.    &st_update_gp,
  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_sampler, /* depends on update_*_texture for swizzle */
  63.    &st_update_framebuffer,
  64.    &st_update_msaa,
  65.    &st_update_sample_shading,
  66.    &st_update_vs_constants,
  67.    &st_update_gs_constants,
  68.    &st_update_fs_constants,
  69.    &st_bind_vs_ubos,
  70.    &st_bind_fs_ubos,
  71.    &st_bind_gs_ubos,
  72.    &st_update_pixel_transfer,
  73.  
  74.    /* this must be done after the vertex program update */
  75.    &st_update_array
  76. };
  77.  
  78.  
  79. void st_init_atoms( struct st_context *st )
  80. {
  81.    /* no-op */
  82. }
  83.  
  84.  
  85. void st_destroy_atoms( struct st_context *st )
  86. {
  87.    /* no-op */
  88. }
  89.  
  90.  
  91. /***********************************************************************
  92.  */
  93.  
  94. static GLboolean check_state( const struct st_state_flags *a,
  95.                               const struct st_state_flags *b )
  96. {
  97.    return ((a->mesa & b->mesa) ||
  98.            (a->st & b->st));
  99. }
  100.  
  101. static void accumulate_state( struct st_state_flags *a,
  102.                               const struct st_state_flags *b )
  103. {
  104.    a->mesa |= b->mesa;
  105.    a->st |= b->st;
  106. }
  107.  
  108.  
  109. static void xor_states( struct st_state_flags *result,
  110.                              const struct st_state_flags *a,
  111.                               const struct st_state_flags *b )
  112. {
  113.    result->mesa = a->mesa ^ b->mesa;
  114.    result->st = a->st ^ b->st;
  115. }
  116.  
  117.  
  118. /* Too complex to figure out, just check every time:
  119.  */
  120. static void check_program_state( struct st_context *st )
  121. {
  122.    struct gl_context *ctx = st->ctx;
  123.  
  124.    if (ctx->VertexProgram._Current != &st->vp->Base)
  125.       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
  126.  
  127.    if (ctx->FragmentProgram._Current != &st->fp->Base)
  128.       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
  129.  
  130.    if (ctx->GeometryProgram._Current != &st->gp->Base)
  131.       st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;
  132. }
  133.  
  134. static void check_attrib_edgeflag(struct st_context *st)
  135. {
  136.    const struct gl_client_array **arrays = st->ctx->Array._DrawArrays;
  137.    GLboolean vertdata_edgeflags, edgeflag_culls_prims, edgeflags_enabled;
  138.  
  139.    if (!arrays)
  140.       return;
  141.  
  142.    edgeflags_enabled = st->ctx->Polygon.FrontMode != GL_FILL ||
  143.                        st->ctx->Polygon.BackMode != GL_FILL;
  144.  
  145.    vertdata_edgeflags = edgeflags_enabled &&
  146.                         arrays[VERT_ATTRIB_EDGEFLAG]->StrideB != 0;
  147.    if (vertdata_edgeflags != st->vertdata_edgeflags) {
  148.       st->vertdata_edgeflags = vertdata_edgeflags;
  149.       st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
  150.    }
  151.  
  152.    edgeflag_culls_prims = edgeflags_enabled && !vertdata_edgeflags &&
  153.                           !st->ctx->Current.Attrib[VERT_ATTRIB_EDGEFLAG][0];
  154.    if (edgeflag_culls_prims != st->edgeflag_culls_prims) {
  155.       st->edgeflag_culls_prims = edgeflag_culls_prims;
  156.       st->dirty.st |= ST_NEW_RASTERIZER;
  157.    }
  158. }
  159.  
  160.  
  161. /***********************************************************************
  162.  * Update all derived state:
  163.  */
  164.  
  165. void st_validate_state( struct st_context *st )
  166. {
  167.    struct st_state_flags *state = &st->dirty;
  168.    GLuint i;
  169.  
  170.    /* Get Mesa driver state. */
  171.    st->dirty.st |= st->ctx->NewDriverState;
  172.    st->ctx->NewDriverState = 0;
  173.  
  174.    check_attrib_edgeflag(st);
  175.  
  176.    if (state->mesa)
  177.       st_flush_bitmap_cache(st);
  178.  
  179.    check_program_state( st );
  180.  
  181.    st_manager_validate_framebuffers(st);
  182.  
  183.    if (state->st == 0)
  184.       return;
  185.  
  186.    /*printf("%s %x/%x\n", __func__, state->mesa, state->st);*/
  187.  
  188. #ifdef DEBUG
  189.    if (1) {
  190. #else
  191.    if (0) {
  192. #endif
  193.       /* Debug version which enforces various sanity checks on the
  194.        * state flags which are generated and checked to help ensure
  195.        * state atoms are ordered correctly in the list.
  196.        */
  197.       struct st_state_flags examined, prev;      
  198.       memset(&examined, 0, sizeof(examined));
  199.       prev = *state;
  200.  
  201.       for (i = 0; i < ARRAY_SIZE(atoms); i++) {  
  202.          const struct st_tracked_state *atom = atoms[i];
  203.          struct st_state_flags generated;
  204.          
  205.          /*printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);*/
  206.  
  207.          if (!(atom->dirty.mesa || atom->dirty.st) ||
  208.              !atom->update) {
  209.             printf("malformed atom %s\n", atom->name);
  210.             assert(0);
  211.          }
  212.  
  213.          if (check_state(state, &atom->dirty)) {
  214.             atoms[i]->update( st );
  215.             /*printf("after: %x\n", atom->dirty.mesa);*/
  216.          }
  217.  
  218.          accumulate_state(&examined, &atom->dirty);
  219.  
  220.          /* generated = (prev ^ state)
  221.           * if (examined & generated)
  222.           *     fail;
  223.           */
  224.          xor_states(&generated, &prev, state);
  225.          assert(!check_state(&examined, &generated));
  226.          prev = *state;
  227.       }
  228.       /*printf("\n");*/
  229.  
  230.    }
  231.    else {
  232.       for (i = 0; i < ARRAY_SIZE(atoms); i++) {  
  233.          if (check_state(state, &atoms[i]->dirty))
  234.             atoms[i]->update( st );
  235.       }
  236.    }
  237.  
  238.    memset(state, 0, sizeof(*state));
  239. }
  240.  
  241.  
  242.  
  243.