src/mesa/main/lines.c

   1 /* $Id: lines.c,v 1.20 2000/10/31 18:09:44 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 #include "vb.h"
  41 #endif
  42
  43
  44
  45 void
  46 _mesa_LineWidth( GLfloat width )
  47 {
  48    GET_CURRENT_CONTEXT(ctx);
  49    if (width<=0.0) {
  50       gl_error( ctx, GL_INVALID_VALUE, "glLineWidth" );
  51       return;
  52    }
  53    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineWidth");
  54
  55    if (ctx->Line.Width != width) {
  56       ctx->Line.Width = width;
  57       ctx->TriangleCaps &= ~DD_LINE_WIDTH;
  58       if (width != 1.0) ctx->TriangleCaps |= DD_LINE_WIDTH;
  59
  60       ctx->NewState |= _NEW_LINE;
  61
  62       if (ctx->Driver.LineWidth)
  63          (*ctx->Driver.LineWidth)(ctx, width);
  64    }
  65 }
  66
  67
  68
  69 void
  70 _mesa_LineStipple( GLint factor, GLushort pattern )
  71 {
  72    GET_CURRENT_CONTEXT(ctx);
  73    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineStipple");
  74    ctx->Line.StippleFactor = CLAMP( factor, 1, 256 );
  75    ctx->Line.StipplePattern = pattern;
  76
  77    ctx->NewState |= _NEW_LINE;
  78
  79    if (ctx->Driver.LineStipple)
  80       ctx->Driver.LineStipple( ctx, factor, pattern );
  81 }
  82
  83