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/* $Id: polygon.c,v 1.22 2002/06/13 04:49:17 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2001 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
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef PC_HEADER
#include "all.h"
#else
#include "glheader.h"
#include "context.h"
#include "image.h"
#include "enums.h"
#include "macros.h"
#include "mem.h"
#include "polygon.h"
#include "mtypes.h"
#endif
void
_mesa_CullFace( GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_debug("glCullFace %s\n", _mesa_lookup_enum_by_nr(mode));
if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
_mesa_error( ctx, GL_INVALID_ENUM, "glCullFace" );
return;
}
if (ctx->Polygon.CullFaceMode == mode)
return;
FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.CullFaceMode = mode;
if (ctx->Driver.CullFace)
ctx->Driver.CullFace( ctx, mode );
}
void
_mesa_FrontFace( GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_debug("glFrontFace %s\n", _mesa_lookup_enum_by_nr(mode));
if (mode!=GL_CW && mode!=GL_CCW) {
_mesa_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
return;
}
if (ctx->Polygon.FrontFace == mode)
return;
FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.FrontFace = mode;
ctx->Polygon._FrontBit = (GLboolean) (mode == GL_CW);
if (ctx->Driver.FrontFace)
ctx->Driver.FrontFace( ctx, mode );
}
void
_mesa_PolygonMode( GLenum face, GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_debug("glPolygonMode %s %s\n",
_mesa_lookup_enum_by_nr(face),
_mesa_lookup_enum_by_nr(mode));
if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
_mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
return;
}
switch (face) {
case GL_FRONT:
if (ctx->Polygon.FrontMode == mode)
return;
FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.FrontMode = mode;
break;
case GL_FRONT_AND_BACK:
if (ctx->Polygon.FrontMode == mode &&
ctx->Polygon.BackMode == mode)
return;
FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.FrontMode = mode;
ctx->Polygon.BackMode = mode;
break;
case GL_BACK:
if (ctx->Polygon.BackMode == mode)
return;
FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.BackMode = mode;
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
return;
}
ctx->_TriangleCaps &= ~DD_TRI_UNFILLED;
if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL)
ctx->_TriangleCaps |= DD_TRI_UNFILLED;
if (ctx->Driver.PolygonMode) {
(*ctx->Driver.PolygonMode)( ctx, face, mode );
}
}
void
_mesa_PolygonStipple( const GLubyte *pattern )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_debug("glPolygonStipple\n");
FLUSH_VERTICES(ctx, _NEW_POLYGONSTIPPLE);
_mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack);
if (ctx->Driver.PolygonStipple)
ctx->Driver.PolygonStipple( ctx, (const GLubyte *) ctx->PolygonStipple );
}
void
_mesa_GetPolygonStipple( GLubyte *dest )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_debug("glGetPolygonStipple\n");
_mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack);
}
void
_mesa_PolygonOffset( GLfloat factor, GLfloat units )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_debug("glPolygonOffset %f %f\n", factor, units);
if (ctx->Polygon.OffsetFactor == factor &&
ctx->Polygon.OffsetUnits == units)
return;
FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.OffsetFactor = factor;
ctx->Polygon.OffsetUnits = units;
ctx->Polygon.OffsetMRD = units * ctx->MRD;
if (ctx->Driver.PolygonOffset)
ctx->Driver.PolygonOffset( ctx, factor, units );
}
void
_mesa_PolygonOffsetEXT( GLfloat factor, GLfloat bias )
{
GET_CURRENT_CONTEXT(ctx);
_mesa_PolygonOffset(factor, bias * ctx->DepthMaxF );
}
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