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/* $Id: polygon.c,v 1.6 1997/06/03 01:58:27 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 2.3
* Copyright (C) 1995-1997 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* $Log: polygon.c,v $
* Revision 1.6 1997/06/03 01:58:27 brianp
* fixed unpacking bug in gl_PolygonStipple()
*
* Revision 1.5 1997/05/28 03:26:02 brianp
* added precompiled header (PCH) support
*
* Revision 1.4 1997/04/12 16:54:05 brianp
* new NEW_POLYGON state flag
*
* Revision 1.3 1996/10/11 03:44:58 brianp
* removed Polygon.OffsetBias
*
* Revision 1.2 1996/09/26 22:48:40 brianp
* set NEW_RASTER_OPS flag in gl_PolygonStipple() if stippling enabled
*
* Revision 1.1 1996/09/13 01:38:16 brianp
* Initial revision
*
*/
#ifdef PCH
#include "all.h"
#else
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "context.h"
#include "macros.h"
#include "polygon.h"
#include "types.h"
#endif
void gl_CullFace( GLcontext *ctx, GLenum mode )
{
if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
return;
}
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glCullFace" );
return;
}
ctx->Polygon.CullFaceMode = mode;
ctx->NewState |= NEW_POLYGON;
}
void gl_FrontFace( GLcontext *ctx, GLenum mode )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glFrontFace" );
return;
}
if (mode!=GL_CW && mode!=GL_CCW) {
gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
return;
}
ctx->Polygon.FrontFace = mode;
}
void gl_PolygonMode( GLcontext *ctx, GLenum face, GLenum mode )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glPolygonMode" );
return;
}
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: */
if (ctx->Polygon.FrontMode!=GL_FILL || ctx->Polygon.BackMode!=GL_FILL) {
ctx->Polygon.Unfilled = GL_TRUE;
}
else {
ctx->Polygon.Unfilled = GL_FALSE;
}
ctx->NewState |= NEW_POLYGON;
}
void gl_PolygonStipple( GLcontext *ctx, const GLubyte *mask )
{
GLint i;
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glPolygonStipple" );
return;
}
/* TODO: bit twiddling, unpacking */
for (i=0;i<32;i++) {
ctx->PolygonStipple[i] = (mask[i*4+0] << 24)
| (mask[i*4+1] << 16)
| (mask[i*4+2] << 8)
| (mask[i*4+3]);
}
if (ctx->Polygon.StippleFlag) {
ctx->NewState |= NEW_RASTER_OPS;
}
}
void gl_GetPolygonStipple( GLcontext *ctx, GLubyte *mask )
{
/* TODO */
}
void gl_PolygonOffset( GLcontext *ctx,
GLfloat factor, GLfloat units )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glPolygonOffset" );
return;
}
ctx->Polygon.OffsetFactor = factor;
ctx->Polygon.OffsetUnits = units;
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.