1 /**
2 * \file blend.h
3 * Blending functions operations.
4 */
5
6 /*
7 * Mesa 3-D graphics library
8 *
9 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be included
19 * in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
25 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
26 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
27 * OTHER DEALINGS IN THE SOFTWARE.
28 */
29
30
31
32 #ifndef BLEND_H
33 #define BLEND_H
34
35
36 #include "glheader.h"
37 #include "context.h"
38 #include "formats.h"
39 #include "extensions.h"
40
41 struct gl_context;
42 struct gl_framebuffer;
43
44
45 extern void GLAPIENTRY
46 _mesa_BlendFunc( GLenum sfactor, GLenum dfactor );
47
48 extern void GLAPIENTRY
49 _mesa_BlendFunc_no_error(GLenum sfactor, GLenum dfactor);
50
51 extern void GLAPIENTRY
52 _mesa_BlendFuncSeparate( GLenum sfactorRGB, GLenum dfactorRGB,
53 GLenum sfactorA, GLenum dfactorA );
54
55 extern void GLAPIENTRY
56 _mesa_BlendFuncSeparate_no_error(GLenum sfactorRGB, GLenum dfactorRGB,
57 GLenum sfactorA, GLenum dfactorA);
58
59 extern void GLAPIENTRY
60 _mesa_BlendFunciARB_no_error(GLuint buf, GLenum sfactor, GLenum dfactor);
61 extern void GLAPIENTRY
62 _mesa_BlendFunciARB(GLuint buf, GLenum sfactor, GLenum dfactor);
63
64
65 extern void GLAPIENTRY
66 _mesa_BlendFuncSeparateiARB_no_error(GLuint buf, GLenum sfactorRGB,
67 GLenum dfactorRGB, GLenum sfactorA,
68 GLenum dfactorA);
69 extern void GLAPIENTRY
70 _mesa_BlendFuncSeparateiARB(GLuint buf, GLenum sfactorRGB, GLenum dfactorRGB,
71 GLenum sfactorA, GLenum dfactorA);
72
73
74 extern void GLAPIENTRY
75 _mesa_BlendEquation( GLenum mode );
76
77
78 void GLAPIENTRY
79 _mesa_BlendEquationiARB_no_error(GLuint buf, GLenum mode);
80
81 extern void GLAPIENTRY
82 _mesa_BlendEquationiARB(GLuint buf, GLenum mode);
83
84
85 void GLAPIENTRY
86 _mesa_BlendEquationSeparate_no_error(GLenum modeRGB, GLenum modeA);
87
88 extern void GLAPIENTRY
89 _mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA );
90
91
92 extern void GLAPIENTRY
93 _mesa_BlendEquationSeparateiARB_no_error(GLuint buf, GLenum modeRGB,
94 GLenum modeA);
95 extern void GLAPIENTRY
96 _mesa_BlendEquationSeparateiARB(GLuint buf, GLenum modeRGB, GLenum modeA);
97
98
99 extern void GLAPIENTRY
100 _mesa_BlendColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
101
102
103 extern void GLAPIENTRY
104 _mesa_AlphaFunc( GLenum func, GLclampf ref );
105
106
107 extern void GLAPIENTRY
108 _mesa_LogicOp( GLenum opcode );
109
110
111 extern void GLAPIENTRY
112 _mesa_LogicOp_no_error(GLenum opcode);
113
114
115 extern void GLAPIENTRY
116 _mesa_IndexMask( GLuint mask );
117
118 extern void GLAPIENTRY
119 _mesa_ColorMask( GLboolean red, GLboolean green,
120 GLboolean blue, GLboolean alpha );
121
122 extern void GLAPIENTRY
123 _mesa_ColorMaski( GLuint buf, GLboolean red, GLboolean green,
124 GLboolean blue, GLboolean alpha );
125
126
127 extern void GLAPIENTRY
128 _mesa_ClampColor(GLenum target, GLenum clamp);
129
130 extern GLboolean
131 _mesa_get_clamp_fragment_color(const struct gl_context *ctx,
132 const struct gl_framebuffer *drawFb);
133
134 extern GLboolean
135 _mesa_get_clamp_vertex_color(const struct gl_context *ctx,
136 const struct gl_framebuffer *drawFb);
137
138 extern GLboolean
139 _mesa_get_clamp_read_color(const struct gl_context *ctx,
140 const struct gl_framebuffer *readFb);
141
142 extern void
143 _mesa_update_clamp_fragment_color(struct gl_context *ctx,
144 const struct gl_framebuffer *drawFb);
145
146 extern void
147 _mesa_update_clamp_vertex_color(struct gl_context *ctx,
148 const struct gl_framebuffer *drawFb);
149
150 extern mesa_format
151 _mesa_get_render_format(const struct gl_context *ctx, mesa_format format);
152
153 extern void
154 _mesa_init_color( struct gl_context * ctx );
155
156
157 static inline void
_mesa_flush_vertices_for_blend_state(struct gl_context * ctx)158 _mesa_flush_vertices_for_blend_state(struct gl_context *ctx)
159 {
160 /* The advanced blend mode needs _NEW_COLOR to update the state constant,
161 * so we have to set it. This is inefficient.
162 * This should only be done for states that affect the state constant.
163 * It shouldn't be done for other blend states.
164 */
165 if (_mesa_has_KHR_blend_equation_advanced(ctx) ||
166 !ctx->DriverFlags.NewBlend) {
167 FLUSH_VERTICES(ctx, _NEW_COLOR);
168 } else {
169 FLUSH_VERTICES(ctx, 0);
170 }
171 ctx->NewDriverState |= ctx->DriverFlags.NewBlend;
172 }
173
174 #endif
175