mirror of
https://github.com/reactos/reactos.git
synced 2024-08-28 14:18:41 +00:00
300 lines
7.8 KiB
C
300 lines
7.8 KiB
C
/**
|
|
* \file polygon.c
|
|
* Polygon operations.
|
|
*/
|
|
|
|
/*
|
|
* Mesa 3-D graphics library
|
|
* Version: 6.5.1
|
|
*
|
|
* Copyright (C) 1999-2006 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.
|
|
*/
|
|
|
|
#include <precomp.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 )
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE&VERBOSE_API)
|
|
_mesa_debug(ctx, "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 );
|
|
}
|
|
|
|
|
|
/**
|
|
* 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 )
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE&VERBOSE_API)
|
|
_mesa_debug(ctx, "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 );
|
|
}
|
|
|
|
|
|
/**
|
|
* 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 )
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE&VERBOSE_API)
|
|
_mesa_debug(ctx, "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;
|
|
}
|
|
|
|
if (ctx->Polygon.FrontMode == GL_FILL && ctx->Polygon.BackMode == GL_FILL)
|
|
ctx->_TriangleCaps &= ~DD_TRI_UNFILLED;
|
|
else
|
|
ctx->_TriangleCaps |= DD_TRI_UNFILLED;
|
|
|
|
if (ctx->Driver.PolygonMode)
|
|
ctx->Driver.PolygonMode(ctx, face, mode);
|
|
}
|
|
|
|
#if _HAVE_FULL_GL
|
|
|
|
|
|
/**
|
|
* This routine updates the ctx->Polygon.Stipple state.
|
|
* If we're getting the stipple data from a PBO, we map the buffer
|
|
* in order to access the data.
|
|
* In any case, we obey the current pixel unpacking parameters when fetching
|
|
* the stipple data.
|
|
*
|
|
* In the future, this routine should be used as a fallback, called via
|
|
* ctx->Driver.PolygonStipple(). We'll have to update all the DRI drivers
|
|
* too.
|
|
*/
|
|
void
|
|
_mesa_polygon_stipple(struct gl_context *ctx, const GLubyte *pattern)
|
|
{
|
|
if (!pattern)
|
|
return;
|
|
|
|
_mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack);
|
|
}
|
|
|
|
|
|
/**
|
|
* Called by glPolygonStipple.
|
|
*/
|
|
void GLAPIENTRY
|
|
_mesa_PolygonStipple( const GLubyte *pattern )
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE&VERBOSE_API)
|
|
_mesa_debug(ctx, "glPolygonStipple\n");
|
|
|
|
FLUSH_VERTICES(ctx, _NEW_POLYGONSTIPPLE);
|
|
|
|
_mesa_polygon_stipple(ctx, pattern);
|
|
|
|
if (ctx->Driver.PolygonStipple)
|
|
ctx->Driver.PolygonStipple(ctx, pattern);
|
|
}
|
|
|
|
|
|
/**
|
|
* Called by glPolygonStipple.
|
|
*/
|
|
void GLAPIENTRY
|
|
_mesa_GetPolygonStipple( GLubyte *dest )
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE&VERBOSE_API)
|
|
_mesa_debug(ctx, "glGetPolygonStipple\n");
|
|
if (!dest)
|
|
return;
|
|
|
|
_mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack);
|
|
}
|
|
|
|
|
|
void GLAPIENTRY
|
|
_mesa_PolygonOffset( GLfloat factor, GLfloat units )
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE&VERBOSE_API)
|
|
_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);
|
|
/* XXX mult by DepthMaxF here??? */
|
|
_mesa_PolygonOffset(factor, bias * ctx->DrawBuffer->_DepthMaxF );
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
/**********************************************************************/
|
|
/** \name Initialization */
|
|
/*@{*/
|
|
|
|
/**
|
|
* Initialize the context polygon state.
|
|
*
|
|
* \param ctx GL context.
|
|
*
|
|
* Initializes __struct gl_contextRec::Polygon and __struct gl_contextRec::PolygonStipple
|
|
* attribute groups.
|
|
*/
|
|
void _mesa_init_polygon( struct gl_context * 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) );
|
|
}
|
|
|
|
/*@}*/
|