-/* $Id: polygon.c,v 1.4 1999/10/08 09:27:11 keithw Exp $ */
+/**
+ * \file polygon.c
+ * Polygon operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
+ * Version: 4.1
+ *
+ * Copyright (C) 1999-2002 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
*/
-/* $XFree86: xc/lib/GL/mesa/src/polygon.c,v 1.3 1999/04/04 00:20:29 dawes Exp $ */
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#ifndef XFree86Server
-#include <assert.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#else
-#include "GL/xf86glx.h"
-#endif
+#include "glheader.h"
+#include "imports.h"
#include "context.h"
#include "image.h"
#include "enums.h"
#include "macros.h"
#include "polygon.h"
-#include "types.h"
-#ifdef XFree86Server
-#include "GL/xf86glx.h"
-#endif
-#endif
-
-
-
-void gl_CullFace( GLcontext *ctx, GLenum mode )
+#include "mtypes.h"
+
+
+/**
+ * Specify whether to cull front- or back-facing facets.
+ *
+ * \param mode culling mode.
+ *
+ * \sa glCullFace().
+ *
+ * Verifies the parameter and updates gl_polygon_attrib::CullFaceMode. On
+ * change, flushes the vertices and notifies the driver via
+ * the dd_function_table::CullFace callback.
+ */
+void GLAPIENTRY
+_mesa_CullFace( GLenum mode )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glCullFace");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glCullFace %s\n", gl_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glCullFace %s\n", _mesa_lookup_enum_by_nr(mode));
if (mode!=GL_FRONT && mode!=GL_BACK && mode!=GL_FRONT_AND_BACK) {
- gl_error( ctx, GL_INVALID_ENUM, "glCullFace" );
+ _mesa_error( ctx, GL_INVALID_ENUM, "glCullFace" );
return;
}
+ if (ctx->Polygon.CullFaceMode == mode)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_POLYGON);
ctx->Polygon.CullFaceMode = mode;
- ctx->NewState |= NEW_POLYGON;
if (ctx->Driver.CullFace)
ctx->Driver.CullFace( ctx, mode );
}
-
-void gl_FrontFace( GLcontext *ctx, GLenum mode )
+/**
+ * Define front- and back-facing
+ *
+ * \param mode orientation of front-facing polygons.
+ *
+ * \sa glFrontFace().
+ *
+ * Verifies the parameter and updates gl_polygon_attrib::FrontFace. On change
+ * flushes the vertices and notifies the driver via
+ * the dd_function_table::FrontFace callback.
+ */
+void GLAPIENTRY
+_mesa_FrontFace( GLenum mode )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glFrontFace");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glFrontFace %s\n", gl_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glFrontFace %s\n", _mesa_lookup_enum_by_nr(mode));
if (mode!=GL_CW && mode!=GL_CCW) {
- gl_error( ctx, GL_INVALID_ENUM, "glFrontFace" );
+ _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 = (mode == GL_CW);
- ctx->NewState |= NEW_POLYGON;
+
+ ctx->Polygon._FrontBit = (GLboolean) (mode == GL_CW);
if (ctx->Driver.FrontFace)
ctx->Driver.FrontFace( ctx, mode );
}
-
-void gl_PolygonMode( GLcontext *ctx, GLenum face, GLenum mode )
+/**
+ * Set the polygon rasterization mode.
+ *
+ * \param face the polygons which \p mode applies to.
+ * \param mode how polygons should be rasterized.
+ *
+ * \sa glPolygonMode().
+ *
+ * Verifies the parameters and updates gl_polygon_attrib::FrontMode and
+ * gl_polygon_attrib::BackMode. On change flushes the vertices and notifies the
+ * driver via the dd_function_table::PolygonMode callback.
+ */
+void GLAPIENTRY
+_mesa_PolygonMode( GLenum face, GLenum mode )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonMode");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glPolygonMode %s %s\n",
- gl_lookup_enum_by_nr(face),
- gl_lookup_enum_by_nr(mode));
+ _mesa_debug(ctx, "glPolygonMode %s %s\n",
+ _mesa_lookup_enum_by_nr(face),
+ _mesa_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)" );
+ if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
return;
}
- if (face==GL_FRONT || face==GL_FRONT_AND_BACK) {
+ 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;
- }
- if (face==GL_BACK || face==GL_FRONT_AND_BACK) {
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;
}
- /* 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);
+ 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 );
}
}
+#if _HAVE_FULL_GL
-
-/*
- * NOTE: stipple pattern has already been unpacked.
- */
-void gl_PolygonStipple( GLcontext *ctx, const GLuint pattern[32] )
+void GLAPIENTRY
+_mesa_PolygonStipple( const GLubyte *pattern )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glPolygonStipple\n");
+ _mesa_debug(ctx, "glPolygonStipple\n");
- MEMCPY( ctx->PolygonStipple, pattern, 32 * 4 );
+ FLUSH_VERTICES(ctx, _NEW_POLYGONSTIPPLE);
+ _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 gl_GetPolygonStipple( GLcontext *ctx, GLubyte *dest )
+void GLAPIENTRY
+_mesa_GetPolygonStipple( GLubyte *dest )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glGetPolygonStipple\n");
+ _mesa_debug(ctx, "glGetPolygonStipple\n");
- gl_pack_polygon_stipple( ctx, ctx->PolygonStipple, dest );
+ _mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack);
}
-
-void gl_PolygonOffset( GLcontext *ctx,
- GLfloat factor, GLfloat units )
+void GLAPIENTRY
+_mesa_PolygonOffset( GLfloat factor, GLfloat units )
{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonOffset");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
- fprintf(stderr, "glPolygonOffset %f %f\n", factor, units);
+ _mesa_debug(ctx, "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;
+
+ if (ctx->Driver.PolygonOffset)
+ ctx->Driver.PolygonOffset( ctx, factor, units );
+}
+
+
+
+void GLAPIENTRY
+_mesa_PolygonOffsetEXT( GLfloat factor, GLfloat bias )
+{
+ GET_CURRENT_CONTEXT(ctx);
+ _mesa_PolygonOffset(factor, bias * ctx->DepthMaxF );
+}
+
+#endif
+
+
+/**********************************************************************/
+/** \name State Management */
+/*@{*/
+
+/*
+ * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET
+ * in ctx->_TriangleCaps if needed.
+ */
+void _mesa_update_polygon( GLcontext *ctx )
+{
+ ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
+
+ if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
+ ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
+
+ /* Any Polygon offsets enabled? */
+ if (ctx->Polygon.OffsetPoint ||
+ ctx->Polygon.OffsetLine ||
+ ctx->Polygon.OffsetFill) {
+ ctx->_TriangleCaps |= DD_TRI_OFFSET;
+ }
+}
+
+/*@}*/
+
+
+/**********************************************************************/
+/** \name Initialization */
+/*@{*/
+
+/**
+ * Initialize the context polygon state.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes __GLcontextRec::Polygon and __GLcontextRec::PolygonStipple
+ * attribute groups.
+ */
+void _mesa_init_polygon( GLcontext * ctx )
+{
+ /* Polygon group */
+ ctx->Polygon.CullFlag = GL_FALSE;
+ ctx->Polygon.CullFaceMode = GL_BACK;
+ ctx->Polygon.FrontFace = GL_CCW;
+ ctx->Polygon._FrontBit = 0;
+ ctx->Polygon.FrontMode = GL_FILL;
+ ctx->Polygon.BackMode = GL_FILL;
+ ctx->Polygon.SmoothFlag = GL_FALSE;
+ ctx->Polygon.StippleFlag = GL_FALSE;
+ ctx->Polygon.OffsetFactor = 0.0F;
+ ctx->Polygon.OffsetUnits = 0.0F;
+ ctx->Polygon.OffsetPoint = GL_FALSE;
+ ctx->Polygon.OffsetLine = GL_FALSE;
+ ctx->Polygon.OffsetFill = GL_FALSE;
+
+
+ /* Polygon Stipple group */
+ MEMSET( ctx->PolygonStipple, 0xff, 32*sizeof(GLuint) );
}
+/*@}*/