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/* $Id: polygon.c,v 1.12 2000/09/26 20:53:53 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2000 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 "types.h"
#endif
void
_mesa_CullFace( GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCullFace");
if (MESA_VERBOSE&VERBOSE_API)
fprintf(stderr, "glCullFace %s\n", gl_lookup_enum_by_nr(mode));
if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
return;
}
ctx->Polygon.CullFaceMode = mode;
ctx->NewState |= NEW_POLYGON;
if (ctx->Driver.CullFace)
ctx->Driver.CullFace( ctx, mode );
}
void
_mesa_FrontFace( GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFrontFace");
if (MESA_VERBOSE&VERBOSE_API)
fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
if (mode!=GL_CW && mode!=GL_CCW) {
gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
return;
}
ctx->Polygon.FrontFace = mode;
ctx->Polygon.FrontBit = (GLboolean) (mode == GL_CW);
ctx->NewState |= NEW_POLYGON;
if (ctx->Driver.FrontFace)
ctx->Driver.FrontFace( ctx, mode );
}
void
_mesa_PolygonMode( GLenum face, GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonMode");
if (MESA_VERBOSE&VERBOSE_API)
fprintf(stderr, "glPolygonMode %s %s\n",
gl_lookup_enum_by_nr(face),
gl_lookup_enum_by_nr(mode));
if (face!=GL_FRONT && face!=GL_BACK && face!=GL_FRONT_AND_BACK) {
gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(face)" );
return;
}
else if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
gl_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
return;
}
if (face==GL_FRONT || face==GL_FRONT_AND_BACK) {
ctx->Polygon.FrontMode = mode;
}
if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
ctx->Polygon.BackMode = mode;
}
/* Compute a handy "shortcut" value: */
ctx->TriangleCaps &= ~DD_TRI_UNFILLED;
ctx->Polygon.Unfilled = GL_FALSE;
if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
ctx->Polygon.Unfilled = GL_TRUE;
ctx->TriangleCaps |= DD_TRI_UNFILLED;
}
ctx->NewState |= (NEW_POLYGON | NEW_RASTER_OPS);
if (ctx->Driver.PolygonMode) {
(*ctx->Driver.PolygonMode)( ctx, face, mode );
}
}
void
_mesa_PolygonStipple( const GLubyte *pattern )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
if (MESA_VERBOSE&VERBOSE_API)
fprintf(stderr, "glPolygonStipple\n");
_mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack);
if (ctx->Polygon.StippleFlag) {
ctx->NewState |= NEW_RASTER_OPS;
}
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_AND_FLUSH(ctx, "glPolygonOffset");
if (MESA_VERBOSE&VERBOSE_API)
fprintf(stderr, "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_AND_FLUSH(ctx, "glPolygonOffset");
if (MESA_VERBOSE&VERBOSE_API)
fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
ctx->Polygon.OffsetFactor = factor;
ctx->Polygon.OffsetUnits = units;
}
void
_mesa_PolygonOffsetEXT( GLfloat factor, GLfloat bias )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffsetEXT");
_mesa_PolygonOffset(factor, bias * ctx->Visual.DepthMaxF );
}
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