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/* $Id: points.c,v 1.28 2001/01/14 06:14:21 keithw Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.4
*
* 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 "macros.h"
#include "mmath.h"
#include "points.h"
#include "texstate.h"
#include "mtypes.h"
#endif
void
_mesa_PointSize( GLfloat size )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (size <= 0.0) {
gl_error( ctx, GL_INVALID_VALUE, "glPointSize" );
return;
}
if (ctx->Point.Size == size)
return;
FLUSH_VERTICES(ctx, _NEW_POINT);
ctx->Point.Size = size;
ctx->Point._Size = CLAMP(size,
ctx->Const.MinPointSize,
ctx->Const.MaxPointSize);
if (ctx->Point._Size == 1.0F)
ctx->_TriangleCaps &= ~DD_POINT_SIZE;
else
ctx->_TriangleCaps |= DD_POINT_SIZE;
if (ctx->Driver.PointSize)
(*ctx->Driver.PointSize)(ctx, size);
}
void
_mesa_PointParameterfEXT( GLenum pname, GLfloat param)
{
_mesa_PointParameterfvEXT(pname, ¶m);
}
void
_mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
switch (pname) {
case GL_DISTANCE_ATTENUATION_EXT:
{
const GLboolean tmp = ctx->Point._Attenuated;
if (TEST_EQ_3V(ctx->Point.Params, params))
return;
FLUSH_VERTICES(ctx, _NEW_POINT);
COPY_3V(ctx->Point.Params, params);
/* Update several derived values now. This likely to be
* more efficient than trying to catch this statechange in
* state.c.
*/
ctx->Point._Attenuated = (params[0] != 1.0 ||
params[1] != 0.0 ||
params[2] != 0.0);
if (tmp != ctx->Point._Attenuated) {
ctx->_Enabled ^= ENABLE_POINT_ATTEN;
ctx->_TriangleCaps ^= DD_POINT_ATTEN;
ctx->_NeedEyeCoords ^= NEED_EYE_POINT_ATTEN;
}
}
break;
case GL_POINT_SIZE_MIN_EXT:
if (*params < 0.0F) {
gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
return;
}
if (ctx->Point.MinSize == *params)
return;
FLUSH_VERTICES(ctx, _NEW_POINT);
ctx->Point.MinSize = *params;
break;
case GL_POINT_SIZE_MAX_EXT:
if (*params < 0.0F) {
gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
return;
}
if (ctx->Point.MaxSize == *params)
return;
FLUSH_VERTICES(ctx, _NEW_POINT);
ctx->Point.MaxSize = *params;
break;
case GL_POINT_FADE_THRESHOLD_SIZE_EXT:
if (*params < 0.0F) {
gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
return;
}
if (ctx->Point.Threshold == *params)
return;
FLUSH_VERTICES(ctx, _NEW_POINT);
ctx->Point.Threshold = *params;
break;
default:
gl_error( ctx, GL_INVALID_ENUM, "glPointParameterfvEXT" );
return;
}
if (ctx->Driver.PointParameterfv)
(*ctx->Driver.PointParameterfv)(ctx, pname, params);
}
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