lines.c revision cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290 
1/* $Id: lines.c,v 1.24 2000/12/26 05:09:29 keithw Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version:  3.5
6 *
7 * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
8 *
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:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
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.
25 */
26
27
28#ifdef PC_HEADER
29#include "all.h"
30#else
31#include "glheader.h"
32#include "context.h"
33#include "depth.h"
34#include "feedback.h"
35#include "lines.h"
36#include "macros.h"
37#include "mmath.h"
38#include "texstate.h"
39#include "mtypes.h"
40#endif
41
42
43
44void
45_mesa_LineWidth( GLfloat width )
46{
47   GET_CURRENT_CONTEXT(ctx);
48   ASSERT_OUTSIDE_BEGIN_END(ctx);
49
50   if (width<=0.0) {
51      gl_error( ctx, GL_INVALID_VALUE, "glLineWidth" );
52      return;
53   }
54
55   if (ctx->Line.Width == width)
56      return;
57
58   FLUSH_VERTICES(ctx, _NEW_LINE);
59   ctx->Line.Width = width;
60
61   if (width != 1.0)
62      ctx->_TriangleCaps |= DD_LINE_WIDTH;
63   else
64      ctx->_TriangleCaps &= ~DD_LINE_WIDTH;
65
66   if (ctx->Driver.LineWidth)
67      (*ctx->Driver.LineWidth)(ctx, width);
68}
69
70
71
72void
73_mesa_LineStipple( GLint factor, GLushort pattern )
74{
75   GET_CURRENT_CONTEXT(ctx);
76   ASSERT_OUTSIDE_BEGIN_END(ctx);
77
78   if (ctx->Line.StippleFactor == CLAMP( factor, 1, 256 ) &&
79       ctx->Line.StipplePattern == pattern)
80      return;
81
82   FLUSH_VERTICES(ctx, _NEW_LINE);
83   ctx->Line.StippleFactor = CLAMP( factor, 1, 256 );
84   ctx->Line.StipplePattern = pattern;
85
86   if (ctx->Driver.LineStipple)
87      ctx->Driver.LineStipple( ctx, factor, pattern );
88}
89
90
91