1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008  Brian Paul   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 "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26#ifndef STATE_H
27#define STATE_H
28
29#include "mtypes.h"
30
31extern void
32_mesa_update_state(struct gl_context *ctx);
33
34/* As above but can only be called between _mesa_lock_context_textures() and
35 * _mesa_unlock_context_textures().
36 */
37extern void
38_mesa_update_state_locked(struct gl_context *ctx);
39
40
41extern void
42_mesa_set_varying_vp_inputs(struct gl_context *ctx, GLbitfield varying_inputs);
43
44
45extern void
46_mesa_set_vp_override(struct gl_context *ctx, GLboolean flag);
47
48
49/**
50 * Update ctx->VertexProgram._VertexProgramMode.
51 */
52extern void
53_mesa_update_vertex_processing_mode(struct gl_context *ctx);
54
55
56/**
57 * Set the _DrawVAO and the net enabled arrays.
58 */
59void
60_mesa_set_draw_vao(struct gl_context *ctx, struct gl_vertex_array_object *vao,
61                   GLbitfield filter);
62
63
64static inline bool
65_mesa_ati_fragment_shader_enabled(const struct gl_context *ctx)
66{
67   return ctx->ATIFragmentShader.Enabled &&
68          ctx->ATIFragmentShader.Current->Instructions[0];
69}
70
71/**
72 * Is the secondary color needed?
73 */
74static inline GLboolean
75_mesa_need_secondary_color(const struct gl_context *ctx)
76{
77   if (ctx->Light.Enabled &&
78       ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
79       return GL_TRUE;
80
81   if (ctx->Fog.ColorSumEnabled)
82      return GL_TRUE;
83
84   if (ctx->VertexProgram._Current &&
85       (ctx->VertexProgram._Current != ctx->VertexProgram._TnlProgram) &&
86       (ctx->VertexProgram._Current->info.inputs_read & VERT_BIT_COLOR1))
87      return GL_TRUE;
88
89   if (ctx->FragmentProgram._Current &&
90       (ctx->FragmentProgram._Current != ctx->FragmentProgram._TexEnvProgram) &&
91       (ctx->FragmentProgram._Current->info.inputs_read & VARYING_BIT_COL1))
92      return GL_TRUE;
93
94   if (_mesa_ati_fragment_shader_enabled(ctx))
95      return GL_TRUE;
96
97   return GL_FALSE;
98}
99
100static inline bool
101_mesa_arb_vertex_program_enabled(const struct gl_context *ctx)
102{
103   return ctx->VertexProgram.Enabled &&
104          ctx->VertexProgram.Current->arb.Instructions;
105}
106
107/** Compute two sided lighting state for fixed function or programs. */
108static inline bool
109_mesa_vertex_program_two_side_enabled(const struct gl_context *ctx)
110{
111   if (ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX] ||
112       _mesa_arb_vertex_program_enabled(ctx))
113      return ctx->VertexProgram.TwoSideEnabled;
114
115   return ctx->Light.Enabled && ctx->Light.Model.TwoSide;
116}
117
118/** Return 0=GL_CCW or 1=GL_CW */
119static inline bool
120_mesa_polygon_get_front_bit(const struct gl_context *ctx)
121{
122   if (ctx->Transform.ClipOrigin == GL_LOWER_LEFT)
123      return ctx->Polygon.FrontFace == GL_CW;
124
125   return ctx->Polygon.FrontFace == GL_CCW;
126}
127
128static inline bool
129_mesa_arb_fragment_program_enabled(const struct gl_context *ctx)
130{
131   return ctx->FragmentProgram.Enabled &&
132          ctx->FragmentProgram.Current->arb.Instructions;
133}
134
135#endif
136