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_allow_draw_out_of_order(struct gl_context *ctx);
33
34 extern 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 */
40 extern void
41 _mesa_update_state_locked(struct gl_context *ctx);
42
43
44 extern void
45 _mesa_set_vp_override(struct gl_context *ctx, GLboolean flag);
46
47
48 /**
49 * Update ctx->VertexProgram._VPMode.
50 */
51 extern void
52 _mesa_update_vertex_processing_mode(struct gl_context *ctx);
53
54 extern void
55 _mesa_reset_vertex_processing_mode(struct gl_context *ctx);
56
57
58 static inline bool
_mesa_ati_fragment_shader_enabled(const struct gl_context * ctx)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 */
68 static inline GLboolean
_mesa_need_secondary_color(const struct gl_context * ctx)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
94 static inline bool
_mesa_arb_vertex_program_enabled(const struct gl_context * ctx)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. */
102 static inline bool
_mesa_vertex_program_two_side_enabled(const struct gl_context * ctx)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 */
113 static inline bool
_mesa_polygon_get_front_bit(const struct gl_context * ctx)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
122 static inline bool
_mesa_arb_fragment_program_enabled(const struct gl_context * ctx)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