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 uint64_t
35 _mesa_get_active_states(struct gl_context *ctx);
36
37 extern void
38 _mesa_update_state(struct gl_context *ctx);
39
40 /* As above but can only be called between _mesa_lock_context_textures() and
41 * _mesa_unlock_context_textures().
42 */
43 extern void
44 _mesa_update_state_locked(struct gl_context *ctx);
45
46 /*
47 * Update state for glClear calls
48 */
49 extern void
50 _mesa_update_clear_state(struct gl_context *ctx);
51
52
53 extern void
54 _mesa_set_vp_override(struct gl_context *ctx, GLboolean flag);
55
56
57 /**
58 * Update ctx->VertexProgram._VPMode.
59 */
60 extern void
61 _mesa_update_vertex_processing_mode(struct gl_context *ctx);
62
63 extern void
64 _mesa_reset_vertex_processing_mode(struct gl_context *ctx);
65
66
67 static inline bool
_mesa_ati_fragment_shader_enabled(const struct gl_context * ctx)68 _mesa_ati_fragment_shader_enabled(const struct gl_context *ctx)
69 {
70 return ctx->ATIFragmentShader.Enabled &&
71 ctx->ATIFragmentShader.Current->Instructions[0];
72 }
73
74 /**
75 * Is the secondary color needed?
76 */
77 static inline GLboolean
_mesa_need_secondary_color(const struct gl_context * ctx)78 _mesa_need_secondary_color(const struct gl_context *ctx)
79 {
80 if (ctx->Light.Enabled &&
81 ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
82 return GL_TRUE;
83
84 if (ctx->Fog.ColorSumEnabled)
85 return GL_TRUE;
86
87 if (ctx->VertexProgram._Current &&
88 (ctx->VertexProgram._Current != ctx->VertexProgram._TnlProgram) &&
89 (ctx->VertexProgram._Current->info.inputs_read & VERT_BIT_COLOR1))
90 return GL_TRUE;
91
92 if (ctx->FragmentProgram._Current &&
93 (ctx->FragmentProgram._Current != ctx->FragmentProgram._TexEnvProgram) &&
94 (ctx->FragmentProgram._Current->info.inputs_read & VARYING_BIT_COL1))
95 return GL_TRUE;
96
97 if (_mesa_ati_fragment_shader_enabled(ctx))
98 return GL_TRUE;
99
100 return GL_FALSE;
101 }
102
103 static inline bool
_mesa_arb_vertex_program_enabled(const struct gl_context * ctx)104 _mesa_arb_vertex_program_enabled(const struct gl_context *ctx)
105 {
106 return ctx->VertexProgram.Enabled &&
107 ctx->VertexProgram.Current->arb.Instructions;
108 }
109
110 /** Compute two sided lighting state for fixed function or programs. */
111 static inline bool
_mesa_vertex_program_two_side_enabled(const struct gl_context * ctx)112 _mesa_vertex_program_two_side_enabled(const struct gl_context *ctx)
113 {
114 if (ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX] ||
115 _mesa_arb_vertex_program_enabled(ctx))
116 return ctx->VertexProgram.TwoSideEnabled;
117
118 return ctx->Light.Enabled && ctx->Light.Model.TwoSide;
119 }
120
121 /** Return 0=GL_CCW or 1=GL_CW */
122 static inline bool
_mesa_polygon_get_front_bit(const struct gl_context * ctx)123 _mesa_polygon_get_front_bit(const struct gl_context *ctx)
124 {
125 if (ctx->Transform.ClipOrigin == GL_LOWER_LEFT)
126 return ctx->Polygon.FrontFace == GL_CW;
127
128 return ctx->Polygon.FrontFace == GL_CCW;
129 }
130
131 static inline bool
_mesa_arb_fragment_program_enabled(const struct gl_context * ctx)132 _mesa_arb_fragment_program_enabled(const struct gl_context *ctx)
133 {
134 return ctx->FragmentProgram.Enabled &&
135 ctx->FragmentProgram.Current->arb.Instructions;
136 }
137
138 #endif
139