1 /* $Id: points.c,v 1.29 2001/03/03 20:33:27 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
43 _mesa_PointSize( GLfloat size
)
45 GET_CURRENT_CONTEXT(ctx
);
46 ASSERT_OUTSIDE_BEGIN_END(ctx
);
49 _mesa_error( ctx
, GL_INVALID_VALUE
, "glPointSize" );
53 if (ctx
->Point
.Size
== size
)
56 FLUSH_VERTICES(ctx
, _NEW_POINT
);
57 ctx
->Point
.Size
= size
;
58 ctx
->Point
._Size
= CLAMP(size
,
59 ctx
->Const
.MinPointSize
,
60 ctx
->Const
.MaxPointSize
);
62 if (ctx
->Point
._Size
== 1.0F
)
63 ctx
->_TriangleCaps
&= ~DD_POINT_SIZE
;
65 ctx
->_TriangleCaps
|= DD_POINT_SIZE
;
67 if (ctx
->Driver
.PointSize
)
68 (*ctx
->Driver
.PointSize
)(ctx
, size
);
74 _mesa_PointParameterfEXT( GLenum pname
, GLfloat param
)
76 _mesa_PointParameterfvEXT(pname
, ¶m
);
81 _mesa_PointParameterfvEXT( GLenum pname
, const GLfloat
*params
)
83 GET_CURRENT_CONTEXT(ctx
);
84 ASSERT_OUTSIDE_BEGIN_END(ctx
);
87 case GL_DISTANCE_ATTENUATION_EXT
:
89 const GLboolean tmp
= ctx
->Point
._Attenuated
;
90 if (TEST_EQ_3V(ctx
->Point
.Params
, params
))
93 FLUSH_VERTICES(ctx
, _NEW_POINT
);
94 COPY_3V(ctx
->Point
.Params
, params
);
96 /* Update several derived values now. This likely to be
97 * more efficient than trying to catch this statechange in
100 ctx
->Point
._Attenuated
= (params
[0] != 1.0 ||
104 if (tmp
!= ctx
->Point
._Attenuated
) {
105 ctx
->_Enabled
^= ENABLE_POINT_ATTEN
;
106 ctx
->_TriangleCaps
^= DD_POINT_ATTEN
;
107 ctx
->_NeedEyeCoords
^= NEED_EYE_POINT_ATTEN
;
111 case GL_POINT_SIZE_MIN_EXT
:
112 if (*params
< 0.0F
) {
113 _mesa_error( ctx
, GL_INVALID_VALUE
, "glPointParameterfvEXT" );
116 if (ctx
->Point
.MinSize
== *params
)
118 FLUSH_VERTICES(ctx
, _NEW_POINT
);
119 ctx
->Point
.MinSize
= *params
;
121 case GL_POINT_SIZE_MAX_EXT
:
122 if (*params
< 0.0F
) {
123 _mesa_error( ctx
, GL_INVALID_VALUE
, "glPointParameterfvEXT" );
126 if (ctx
->Point
.MaxSize
== *params
)
128 FLUSH_VERTICES(ctx
, _NEW_POINT
);
129 ctx
->Point
.MaxSize
= *params
;
131 case GL_POINT_FADE_THRESHOLD_SIZE_EXT
:
132 if (*params
< 0.0F
) {
133 _mesa_error( ctx
, GL_INVALID_VALUE
, "glPointParameterfvEXT" );
136 if (ctx
->Point
.Threshold
== *params
)
138 FLUSH_VERTICES(ctx
, _NEW_POINT
);
139 ctx
->Point
.Threshold
= *params
;
142 _mesa_error( ctx
, GL_INVALID_ENUM
, "glPointParameterfvEXT" );
146 if (ctx
->Driver
.PointParameterfv
)
147 (*ctx
->Driver
.PointParameterfv
)(ctx
, pname
, params
);