-/* $Id: lines.c,v 1.21 2000/11/05 18:40:58 keithw Exp $ */
+/**
+ * \file lines.c
+ * Line operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ * Version: 5.1
+ *
+ * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
+ *
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
*/
-#ifdef PC_HEADER
-#include "all.h"
-#else
#include "glheader.h"
#include "context.h"
#include "depth.h"
-#include "feedback.h"
#include "lines.h"
#include "macros.h"
-#include "mmath.h"
#include "texstate.h"
-#include "types.h"
-#include "vb.h"
-#endif
-
+#include "mtypes.h"
-void
+/**
+ * Set the line width.
+ *
+ * \param width line width in pixels.
+ *
+ * \sa glLineWidth().
+ *
+ * Verifies the parameter and updates gl_line_attrib::Width. On a change,
+ * flushes the vertices, updates the clamped line width and marks the
+ * DD_LINE_WIDTH flag in __GLcontextRec::_TriangleCaps for the drivers if the
+ * width is different from one. Notifies the driver via the
+ * dd_function_table::LineWidth callback.
+ */
+void GLAPIENTRY
_mesa_LineWidth( GLfloat width )
{
GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
if (width<=0.0) {
- gl_error( ctx, GL_INVALID_VALUE, "glLineWidth" );
+ _mesa_error( ctx, GL_INVALID_VALUE, "glLineWidth" );
return;
}
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineWidth");
-
- if (ctx->Line.Width != width) {
- ctx->Line.Width = width;
- ctx->_TriangleCaps &= ~DD_LINE_WIDTH;
- if (width != 1.0) ctx->_TriangleCaps |= DD_LINE_WIDTH;
- ctx->NewState |= _NEW_LINE;
+ if (ctx->Line.Width == width)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_LINE);
+ ctx->Line.Width = width;
+ ctx->Line._Width = CLAMP(width,
+ ctx->Const.MinLineWidth,
+ ctx->Const.MaxLineWidth);
- if (ctx->Driver.LineWidth)
- (*ctx->Driver.LineWidth)(ctx, width);
- }
-}
+ if (width != 1.0)
+ ctx->_TriangleCaps |= DD_LINE_WIDTH;
+ else
+ ctx->_TriangleCaps &= ~DD_LINE_WIDTH;
+
+ if (ctx->Driver.LineWidth)
+ (*ctx->Driver.LineWidth)(ctx, width);
+}
-void
+/**
+ * Set the line stipple pattern.
+ *
+ * \param factor pattern scale factor.
+ * \param pattern bit pattern.
+ *
+ * \sa glLineStipple().
+ *
+ * Updates gl_line_attrib::StippleFactor and gl_line_attrib::StipplePattern. On
+ * change flushes the vertices and notifies the driver via
+ * the dd_function_table::LineStipple callback.
+ */
+void GLAPIENTRY
_mesa_LineStipple( GLint factor, GLushort pattern )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLineStipple");
- ctx->Line.StippleFactor = CLAMP( factor, 1, 256 );
- ctx->Line.StipplePattern = pattern;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
- ctx->NewState |= _NEW_LINE;
+ factor = CLAMP( factor, 1, 256 );
+
+ if (ctx->Line.StippleFactor == factor &&
+ ctx->Line.StipplePattern == pattern)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_LINE);
+ ctx->Line.StippleFactor = factor;
+ ctx->Line.StipplePattern = pattern;
if (ctx->Driver.LineStipple)
ctx->Driver.LineStipple( ctx, factor, pattern );
}
+/**
+ * Initialize the context line state.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes __GLcontextRec::Line and line related constants in
+ * __GLcontextRec::Const.
+ */
+void GLAPIENTRY _mesa_init_line( GLcontext * ctx )
+{
+ /* Line group */
+ ctx->Line.SmoothFlag = GL_FALSE;
+ ctx->Line.StippleFlag = GL_FALSE;
+ ctx->Line.Width = 1.0;
+ ctx->Line._Width = 1.0;
+ ctx->Line.StipplePattern = 0xffff;
+ ctx->Line.StippleFactor = 1;
+}