lines.c revision b980b2eeb62dc48101a7481d02d196c80b9da397
1/* $Id: lines.c,v 1.25 2001/01/08 04:09:41 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 ctx->Line._Width = CLAMP(width, 61 ctx->Const.MinLineWidth, 62 ctx->Const.MaxLineWidth); 63 64 65 if (width != 1.0) 66 ctx->_TriangleCaps |= DD_LINE_WIDTH; 67 else 68 ctx->_TriangleCaps &= ~DD_LINE_WIDTH; 69 70 if (ctx->Driver.LineWidth) 71 (*ctx->Driver.LineWidth)(ctx, width); 72} 73 74 75 76void 77_mesa_LineStipple( GLint factor, GLushort pattern ) 78{ 79 GET_CURRENT_CONTEXT(ctx); 80 ASSERT_OUTSIDE_BEGIN_END(ctx); 81 82 if (ctx->Line.StippleFactor == CLAMP( factor, 1, 256 ) && 83 ctx->Line.StipplePattern == pattern) 84 return; 85 86 FLUSH_VERTICES(ctx, _NEW_LINE); 87 ctx->Line.StippleFactor = CLAMP( factor, 1, 256 ); 88 ctx->Line.StipplePattern = pattern; 89 90 if (ctx->Driver.LineStipple) 91 ctx->Driver.LineStipple( ctx, factor, pattern ); 92} 93 94 95