7 * Mesa 3-D graphics library
10 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
19 * The above copyright notice and this permission notice shall be included
20 * in all copies or substantial portions of the Software.
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
23 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
26 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
27 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 * Set current point size.
41 * \param size point diameter in pixels
45 _mesa_PointSize( GLfloat size
)
47 GET_CURRENT_CONTEXT(ctx
);
48 ASSERT_OUTSIDE_BEGIN_END(ctx
);
51 _mesa_error( ctx
, GL_INVALID_VALUE
, "glPointSize" );
55 if (ctx
->Point
.Size
== size
)
58 FLUSH_VERTICES(ctx
, _NEW_POINT
);
59 ctx
->Point
.Size
= size
;
61 if (ctx
->Driver
.PointSize
)
62 ctx
->Driver
.PointSize(ctx
, size
);
70 _mesa_PointParameteri( GLenum pname
, GLint param
)
73 p
[0] = (GLfloat
) param
;
75 _mesa_PointParameterfv(pname
, p
);
80 _mesa_PointParameteriv( GLenum pname
, const GLint
*params
)
83 p
[0] = (GLfloat
) params
[0];
84 if (pname
== GL_DISTANCE_ATTENUATION_EXT
) {
85 p
[1] = (GLfloat
) params
[1];
86 p
[2] = (GLfloat
) params
[2];
88 _mesa_PointParameterfv(pname
, p
);
93 _mesa_PointParameterf( GLenum pname
, GLfloat param
)
98 _mesa_PointParameterfv(pname
, p
);
103 _mesa_PointParameterfv( GLenum pname
, const GLfloat
*params
)
105 GET_CURRENT_CONTEXT(ctx
);
106 ASSERT_OUTSIDE_BEGIN_END(ctx
);
109 case GL_DISTANCE_ATTENUATION_EXT
:
110 if (ctx
->Extensions
.EXT_point_parameters
) {
111 if (TEST_EQ_3V(ctx
->Point
.Params
, params
))
113 FLUSH_VERTICES(ctx
, _NEW_POINT
);
114 COPY_3V(ctx
->Point
.Params
, params
);
115 ctx
->Point
._Attenuated
= (ctx
->Point
.Params
[0] != 1.0 ||
116 ctx
->Point
.Params
[1] != 0.0 ||
117 ctx
->Point
.Params
[2] != 0.0);
119 if (ctx
->Point
._Attenuated
)
120 ctx
->_TriangleCaps
|= DD_POINT_ATTEN
;
122 ctx
->_TriangleCaps
&= ~DD_POINT_ATTEN
;
125 _mesa_error(ctx
, GL_INVALID_ENUM
,
126 "glPointParameterf[v]{EXT,ARB}(pname)");
130 case GL_POINT_SIZE_MIN_EXT
:
131 if (ctx
->Extensions
.EXT_point_parameters
) {
132 if (params
[0] < 0.0F
) {
133 _mesa_error( ctx
, GL_INVALID_VALUE
,
134 "glPointParameterf[v]{EXT,ARB}(param)" );
137 if (ctx
->Point
.MinSize
== params
[0])
139 FLUSH_VERTICES(ctx
, _NEW_POINT
);
140 ctx
->Point
.MinSize
= params
[0];
143 _mesa_error(ctx
, GL_INVALID_ENUM
,
144 "glPointParameterf[v]{EXT,ARB}(pname)");
148 case GL_POINT_SIZE_MAX_EXT
:
149 if (ctx
->Extensions
.EXT_point_parameters
) {
150 if (params
[0] < 0.0F
) {
151 _mesa_error( ctx
, GL_INVALID_VALUE
,
152 "glPointParameterf[v]{EXT,ARB}(param)" );
155 if (ctx
->Point
.MaxSize
== params
[0])
157 FLUSH_VERTICES(ctx
, _NEW_POINT
);
158 ctx
->Point
.MaxSize
= params
[0];
161 _mesa_error(ctx
, GL_INVALID_ENUM
,
162 "glPointParameterf[v]{EXT,ARB}(pname)");
166 case GL_POINT_FADE_THRESHOLD_SIZE_EXT
:
167 if (ctx
->Extensions
.EXT_point_parameters
) {
168 if (params
[0] < 0.0F
) {
169 _mesa_error( ctx
, GL_INVALID_VALUE
,
170 "glPointParameterf[v]{EXT,ARB}(param)" );
173 if (ctx
->Point
.Threshold
== params
[0])
175 FLUSH_VERTICES(ctx
, _NEW_POINT
);
176 ctx
->Point
.Threshold
= params
[0];
179 _mesa_error(ctx
, GL_INVALID_ENUM
,
180 "glPointParameterf[v]{EXT,ARB}(pname)");
184 case GL_POINT_SPRITE_R_MODE_NV
:
185 /* This is one area where ARB_point_sprite and NV_point_sprite
186 * differ. In ARB_point_sprite the POINT_SPRITE_R_MODE is
187 * always ZERO. NV_point_sprite adds the S and R modes.
189 if (ctx
->Extensions
.NV_point_sprite
) {
190 GLenum value
= (GLenum
) params
[0];
191 if (value
!= GL_ZERO
&& value
!= GL_S
&& value
!= GL_R
) {
192 _mesa_error(ctx
, GL_INVALID_VALUE
,
193 "glPointParameterf[v]{EXT,ARB}(param)");
196 if (ctx
->Point
.SpriteRMode
== value
)
198 FLUSH_VERTICES(ctx
, _NEW_POINT
);
199 ctx
->Point
.SpriteRMode
= value
;
202 _mesa_error(ctx
, GL_INVALID_ENUM
,
203 "glPointParameterf[v]{EXT,ARB}(pname)");
207 case GL_POINT_SPRITE_COORD_ORIGIN
:
208 /* This is not completely correct. GL_POINT_SPRITE_COORD_ORIGIN was
209 * added to point sprites when the extension was merged into OpenGL
210 * 2.0. It is expected that an implementation supporting OpenGL 1.4
211 * and GL_ARB_point_sprite will generate an error here.
213 if (ctx
->Extensions
.ARB_point_sprite
) {
214 GLenum value
= (GLenum
) params
[0];
215 if (value
!= GL_LOWER_LEFT
&& value
!= GL_UPPER_LEFT
) {
216 _mesa_error(ctx
, GL_INVALID_VALUE
,
217 "glPointParameterf[v]{EXT,ARB}(param)");
220 if (ctx
->Point
.SpriteOrigin
== value
)
222 FLUSH_VERTICES(ctx
, _NEW_POINT
);
223 ctx
->Point
.SpriteOrigin
= value
;
226 _mesa_error(ctx
, GL_INVALID_ENUM
,
227 "glPointParameterf[v]{EXT,ARB}(pname)");
232 _mesa_error( ctx
, GL_INVALID_ENUM
,
233 "glPointParameterf[v]{EXT,ARB}(pname)" );
237 if (ctx
->Driver
.PointParameterfv
)
238 (*ctx
->Driver
.PointParameterfv
)(ctx
, pname
, params
);
245 * Initialize the context point state.
247 * \param ctx GL context.
249 * Initializes __GLcontextRec::Point and point related constants in
250 * __GLcontextRec::Const.
253 _mesa_init_point(GLcontext
*ctx
)
257 ctx
->Point
.SmoothFlag
= GL_FALSE
;
258 ctx
->Point
.Size
= 1.0;
259 ctx
->Point
.Params
[0] = 1.0;
260 ctx
->Point
.Params
[1] = 0.0;
261 ctx
->Point
.Params
[2] = 0.0;
262 ctx
->Point
._Attenuated
= GL_FALSE
;
263 ctx
->Point
.MinSize
= 0.0;
265 = MAX2(ctx
->Const
.MaxPointSize
, ctx
->Const
.MaxPointSizeAA
);
266 ctx
->Point
.Threshold
= 1.0;
267 ctx
->Point
.PointSprite
= GL_FALSE
; /* GL_ARB/NV_point_sprite */
268 ctx
->Point
.SpriteRMode
= GL_ZERO
; /* GL_NV_point_sprite (only!) */
269 ctx
->Point
.SpriteOrigin
= GL_UPPER_LEFT
; /* GL_ARB_point_sprite */
270 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
271 ctx
->Point
.CoordReplace
[i
] = GL_FALSE
; /* GL_ARB/NV_point_sprite */