src/mesa/main/lines.c

   1 /* $Id: lines.c,v 1.22 2000/11/16 21:05:35 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 "types.h"
  40 #endif
  41
  42
  43
  44 void
  45 _mesa_LineWidth( GLfloat width )
  46 {
  47    GET_CURRENT_CONTEXT(ctx);
  48    if (width<=0.0) {
  49       gl_error( ctx, GL_INVALID_VALUE, "glLineWidth" );
  50       return;
  51    }
  52    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineWidth");
  53
  54    if (ctx->Line.Width != width) {
  55       ctx->Line.Width = width;
  56       ctx->_TriangleCaps &= ~DD_LINE_WIDTH;
  57       if (width != 1.0) ctx->_TriangleCaps |= DD_LINE_WIDTH;
  58
  59       ctx->NewState |= _NEW_LINE;
  60
  61       if (ctx->Driver.LineWidth)
  62          (*ctx->Driver.LineWidth)(ctx, width);
  63    }
  64 }
  65
  66
  67
  68 void
  69 _mesa_LineStipple( GLint factor, GLushort pattern )
  70 {
  71    GET_CURRENT_CONTEXT(ctx);
  72    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineStipple");
  73    ctx->Line.StippleFactor = CLAMP( factor, 1, 256 );
  74    ctx->Line.StipplePattern = pattern;
  75
  76    ctx->NewState |= _NEW_LINE;
  77
  78    if (ctx->Driver.LineStipple)
  79       ctx->Driver.LineStipple( ctx, factor, pattern );
  80 }
  81
  82