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- /* $Id: polygon.c,v 1.3 1996/10/11 03:44:58 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 2.0
- * Copyright (C) 1995-1996 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 1.3 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
- *
- */
-
-
- #include <assert.h>
- #include <stdlib.h>
- #include <string.h>
- #include "context.h"
- #include "macros.h"
- #include "polygon.h"
- #include "types.h"
-
-
-
- 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_RASTER_OPS;
- }
-
-
-
- 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_RASTER_OPS;
- }
-
-
-
- void gl_PolygonStipple( GLcontext *ctx, const GLubyte *mask )
- {
- /* TODO: bit twiddling, unpacking */
- if (INSIDE_BEGIN_END(ctx)) {
- gl_error( ctx, GL_INVALID_OPERATION, "glPolygonStipple" );
- return;
- }
- MEMCPY( ctx->PolygonStipple, mask, 32*4 );
- 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;
- }
-
-