3 * Blending functions operations.
7 * Mesa 3-D graphics library
9 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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:
18 * The above copyright notice and this permission notice shall be included
19 * in all copies or substantial portions of the Software.
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.
39 #include "extensions.h"
42 struct gl_framebuffer
;
45 extern void GLAPIENTRY
46 _mesa_BlendFunc( GLenum sfactor
, GLenum dfactor
);
49 extern void GLAPIENTRY
50 _mesa_BlendFuncSeparate( GLenum sfactorRGB
, GLenum dfactorRGB
,
51 GLenum sfactorA
, GLenum dfactorA
);
54 extern void GLAPIENTRY
55 _mesa_BlendFunciARB_no_error(GLuint buf
, GLenum sfactor
, GLenum dfactor
);
56 extern void GLAPIENTRY
57 _mesa_BlendFunciARB(GLuint buf
, GLenum sfactor
, GLenum dfactor
);
60 extern void GLAPIENTRY
61 _mesa_BlendFuncSeparateiARB_no_error(GLuint buf
, GLenum sfactorRGB
,
62 GLenum dfactorRGB
, GLenum sfactorA
,
64 extern void GLAPIENTRY
65 _mesa_BlendFuncSeparateiARB(GLuint buf
, GLenum sfactorRGB
, GLenum dfactorRGB
,
66 GLenum sfactorA
, GLenum dfactorA
);
69 extern void GLAPIENTRY
70 _mesa_BlendEquation( GLenum mode
);
73 extern void GLAPIENTRY
74 _mesa_BlendEquationiARB(GLuint buf
, GLenum mode
);
77 extern void GLAPIENTRY
78 _mesa_BlendEquationSeparate( GLenum modeRGB
, GLenum modeA
);
81 extern void GLAPIENTRY
82 _mesa_BlendEquationSeparateiARB_no_error(GLuint buf
, GLenum modeRGB
,
84 extern void GLAPIENTRY
85 _mesa_BlendEquationSeparateiARB(GLuint buf
, GLenum modeRGB
, GLenum modeA
);
88 extern void GLAPIENTRY
89 _mesa_BlendColor(GLclampf red
, GLclampf green
, GLclampf blue
, GLclampf alpha
);
92 extern void GLAPIENTRY
93 _mesa_AlphaFunc( GLenum func
, GLclampf ref
);
96 extern void GLAPIENTRY
97 _mesa_LogicOp( GLenum opcode
);
100 extern void GLAPIENTRY
101 _mesa_IndexMask( GLuint mask
);
103 extern void GLAPIENTRY
104 _mesa_ColorMask( GLboolean red
, GLboolean green
,
105 GLboolean blue
, GLboolean alpha
);
107 extern void GLAPIENTRY
108 _mesa_ColorMaski( GLuint buf
, GLboolean red
, GLboolean green
,
109 GLboolean blue
, GLboolean alpha
);
112 extern void GLAPIENTRY
113 _mesa_ClampColor(GLenum target
, GLenum clamp
);
116 _mesa_get_clamp_fragment_color(const struct gl_context
*ctx
,
117 const struct gl_framebuffer
*drawFb
);
120 _mesa_get_clamp_vertex_color(const struct gl_context
*ctx
,
121 const struct gl_framebuffer
*drawFb
);
124 _mesa_get_clamp_read_color(const struct gl_context
*ctx
,
125 const struct gl_framebuffer
*readFb
);
128 _mesa_update_clamp_fragment_color(struct gl_context
*ctx
,
129 const struct gl_framebuffer
*drawFb
);
132 _mesa_update_clamp_vertex_color(struct gl_context
*ctx
,
133 const struct gl_framebuffer
*drawFb
);
136 _mesa_get_render_format(const struct gl_context
*ctx
, mesa_format format
);
139 _mesa_init_color( struct gl_context
* ctx
);
143 _mesa_flush_vertices_for_blend_state(struct gl_context
*ctx
)
145 /* The advanced blend mode needs _NEW_COLOR to update the state constant,
146 * so we have to set it. This is inefficient.
147 * This should only be done for states that affect the state constant.
148 * It shouldn't be done for other blend states.
150 if (_mesa_has_KHR_blend_equation_advanced(ctx
) ||
151 !ctx
->DriverFlags
.NewBlend
) {
152 FLUSH_VERTICES(ctx
, _NEW_COLOR
);
154 FLUSH_VERTICES(ctx
, 0);
156 ctx
->NewDriverState
|= ctx
->DriverFlags
.NewBlend
;