st_atom.c revision bfe79babf99e6b9435195178d1ea64687c60d161 
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 "glheader.h"
30#include "context.h"
31
32#include "pipe/p_defines.h"
33#include "st_context.h"
34#include "st_atom.h"
35#include "st_program.h"
36
37
38
39/* This is used to initialize st->atoms[].  We could use this list
40 * directly except for a single atom, st_update_constants, which has a
41 * .dirty value which changes according to the parameters of the
42 * current fragment and vertex programs, and so cannot be a static
43 * value.
44 */
45static const struct st_tracked_state *atoms[] =
46{
47   &st_update_framebuffer,
48   &st_update_depth_stencil_alpha,
49   &st_update_clip,
50
51   &st_update_shader,
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_texture,
60   &st_update_vs_constants,
61   &st_update_fs_constants,
62   &st_update_pixel_transfer
63};
64
65
66void st_init_atoms( struct st_context *st )
67{
68   GLuint i;
69
70   st->atoms = malloc(sizeof(atoms));
71   st->nr_atoms = sizeof(atoms)/sizeof(*atoms);
72   memcpy(st->atoms, atoms, sizeof(atoms));
73
74   /* Patch in a pointer to the dynamic state atom:
75    */
76   for (i = 0; i < st->nr_atoms; i++) {
77      if (st->atoms[i] == &st_update_vs_constants) {
78	 st->atoms[i] = &st->constants.tracked_state[PIPE_SHADER_VERTEX];
79	 st->atoms[i][0] = st_update_vs_constants;
80      }
81
82      if (st->atoms[i] == &st_update_fs_constants) {
83	 st->atoms[i] = &st->constants.tracked_state[PIPE_SHADER_FRAGMENT];
84	 st->atoms[i][0] = st_update_fs_constants;
85      }
86   }
87}
88
89
90void st_destroy_atoms( struct st_context *st )
91{
92   if (st->atoms) {
93      free(st->atoms);
94      st->atoms = NULL;
95   }
96}
97
98
99/***********************************************************************
100 */
101
102static GLboolean check_state( const struct st_state_flags *a,
103			      const struct st_state_flags *b )
104{
105   return ((a->mesa & b->mesa) ||
106	   (a->st & b->st));
107}
108
109static void accumulate_state( struct st_state_flags *a,
110			      const struct st_state_flags *b )
111{
112   a->mesa |= b->mesa;
113   a->st |= b->st;
114}
115
116
117static void xor_states( struct st_state_flags *result,
118			     const struct st_state_flags *a,
119			      const struct st_state_flags *b )
120{
121   result->mesa = a->mesa ^ b->mesa;
122   result->st = a->st ^ b->st;
123}
124
125
126/* Too complex to figure out, just check every time:
127 */
128static void check_program_state( struct st_context *st )
129{
130   GLcontext *ctx = st->ctx;
131
132   if (ctx->VertexProgram._Current != &st->vp->Base)
133      st->dirty.st |= ST_NEW_VERTEX_PROGRAM;
134
135   if (ctx->FragmentProgram._Current != &st->fp->Base)
136      st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
137
138}
139
140
141/***********************************************************************
142 * Update all derived state:
143 */
144
145void st_validate_state( struct st_context *st )
146{
147   struct st_state_flags *state = &st->dirty;
148   GLuint i;
149
150   check_program_state( st );
151
152   if (state->st == 0)
153      return;
154
155//   _mesa_printf("%s %x/%x\n", __FUNCTION__, state->mesa, state->st);
156
157   if (1) {
158      /* Debug version which enforces various sanity checks on the
159       * state flags which are generated and checked to help ensure
160       * state atoms are ordered correctly in the list.
161       */
162      struct st_state_flags examined, prev;
163      memset(&examined, 0, sizeof(examined));
164      prev = *state;
165
166      for (i = 0; i < st->nr_atoms; i++) {
167	 const struct st_tracked_state *atom = st->atoms[i];
168	 struct st_state_flags generated;
169
170//	 _mesa_printf("atom %s %x/%x\n", atom->name, atom->dirty.mesa, atom->dirty.st);
171
172	 if (!(atom->dirty.mesa || atom->dirty.st) ||
173	     !atom->update) {
174	    _mesa_printf("malformed atom %s\n", atom->name);
175	    assert(0);
176	 }
177
178	 if (check_state(state, &atom->dirty)) {
179	    st->atoms[i]->update( st );
180//	    _mesa_printf("after: %x\n", atom->dirty.mesa);
181	 }
182
183	 accumulate_state(&examined, &atom->dirty);
184
185	 /* generated = (prev ^ state)
186	  * if (examined & generated)
187	  *     fail;
188	  */
189	 xor_states(&generated, &prev, state);
190	 assert(!check_state(&examined, &generated));
191	 prev = *state;
192      }
193//      _mesa_printf("\n");
194
195   }
196   else {
197      const GLuint nr = st->nr_atoms;
198
199      for (i = 0; i < nr; i++) {
200	 if (check_state(state, &st->atoms[i]->dirty))
201	    st->atoms[i]->update( st );
202      }
203   }
204
205   memset(state, 0, sizeof(*state));
206}
207
208
209
210