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