state.h revision 7ec681f3 
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_allow_draw_out_of_order(struct gl_context *ctx);
33
34extern void
35_mesa_update_state(struct gl_context *ctx);
36
37/* As above but can only be called between _mesa_lock_context_textures() and
38 * _mesa_unlock_context_textures().
39 */
40extern void
41_mesa_update_state_locked(struct gl_context *ctx);
42
43
44extern void
45_mesa_set_vp_override(struct gl_context *ctx, GLboolean flag);
46
47
48/**
49 * Update ctx->VertexProgram._VPMode.
50 */
51extern void
52_mesa_update_vertex_processing_mode(struct gl_context *ctx);
53
54extern void
55_mesa_reset_vertex_processing_mode(struct gl_context *ctx);
56
57
58static inline bool
59_mesa_ati_fragment_shader_enabled(const struct gl_context *ctx)
60{
61   return ctx->ATIFragmentShader.Enabled &&
62          ctx->ATIFragmentShader.Current->Instructions[0];
63}
64
65/**
66 * Is the secondary color needed?
67 */
68static inline GLboolean
69_mesa_need_secondary_color(const struct gl_context *ctx)
70{
71   if (ctx->Light.Enabled &&
72       ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
73       return GL_TRUE;
74
75   if (ctx->Fog.ColorSumEnabled)
76      return GL_TRUE;
77
78   if (ctx->VertexProgram._Current &&
79       (ctx->VertexProgram._Current != ctx->VertexProgram._TnlProgram) &&
80       (ctx->VertexProgram._Current->info.inputs_read & VERT_BIT_COLOR1))
81      return GL_TRUE;
82
83   if (ctx->FragmentProgram._Current &&
84       (ctx->FragmentProgram._Current != ctx->FragmentProgram._TexEnvProgram) &&
85       (ctx->FragmentProgram._Current->info.inputs_read & VARYING_BIT_COL1))
86      return GL_TRUE;
87
88   if (_mesa_ati_fragment_shader_enabled(ctx))
89      return GL_TRUE;
90
91   return GL_FALSE;
92}
93
94static inline bool
95_mesa_arb_vertex_program_enabled(const struct gl_context *ctx)
96{
97   return ctx->VertexProgram.Enabled &&
98          ctx->VertexProgram.Current->arb.Instructions;
99}
100
101/** Compute two sided lighting state for fixed function or programs. */
102static inline bool
103_mesa_vertex_program_two_side_enabled(const struct gl_context *ctx)
104{
105   if (ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX] ||
106       _mesa_arb_vertex_program_enabled(ctx))
107      return ctx->VertexProgram.TwoSideEnabled;
108
109   return ctx->Light.Enabled && ctx->Light.Model.TwoSide;
110}
111
112/** Return 0=GL_CCW or 1=GL_CW */
113static inline bool
114_mesa_polygon_get_front_bit(const struct gl_context *ctx)
115{
116   if (ctx->Transform.ClipOrigin == GL_LOWER_LEFT)
117      return ctx->Polygon.FrontFace == GL_CW;
118
119   return ctx->Polygon.FrontFace == GL_CCW;
120}
121
122static inline bool
123_mesa_arb_fragment_program_enabled(const struct gl_context *ctx)
124{
125   return ctx->FragmentProgram.Enabled &&
126          ctx->FragmentProgram.Current->arb.Instructions;
127}
128
129#endif
130