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