-/* $Id: points.c,v 1.34 2002/10/24 23:57:21 brianp Exp $ */
+/**
+ * \file points.c
+ * Point operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 4.1
+ * Version: 6.5
*
- * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2005 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"),
#include "glheader.h"
#include "context.h"
#include "macros.h"
-#include "mmath.h"
#include "points.h"
#include "texstate.h"
#include "mtypes.h"
-
-void
+/**
+ * Set current point size.
+ * \param size point diameter in pixels
+ * \sa glPointSize().
+ */
+void GLAPIENTRY
_mesa_PointSize( GLfloat size )
{
GET_CURRENT_CONTEXT(ctx);
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);
+ ctx->Driver.PointSize(ctx, size);
}
+#if _HAVE_FULL_GL
/*
* Added by GL_NV_point_sprite
*/
-void
+void GLAPIENTRY
_mesa_PointParameteriNV( GLenum pname, GLint param )
{
const GLfloat value = (GLfloat) param;
/*
* Added by GL_NV_point_sprite
*/
-void
+void GLAPIENTRY
_mesa_PointParameterivNV( GLenum pname, const GLint *params )
{
const GLfloat value = (GLfloat) params[0];
/*
* Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
*/
-void
+void GLAPIENTRY
_mesa_PointParameterfEXT( GLenum pname, GLfloat param)
{
_mesa_PointParameterfvEXT(pname, ¶m);
/*
* Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
*/
-void
+void GLAPIENTRY
_mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
{
GET_CURRENT_CONTEXT(ctx);
switch (pname) {
case GL_DISTANCE_ATTENUATION_EXT:
if (ctx->Extensions.EXT_point_parameters) {
- 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->_TriangleCaps ^= DD_POINT_ATTEN;
- ctx->_NeedEyeCoords ^= NEED_EYE_POINT_ATTEN;
- }
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
}
break;
case GL_POINT_SPRITE_R_MODE_NV:
+ /* This is one area where ARB_point_sprite and NV_point_sprite
+ * differ. In ARB_point_sprite the POINT_SPRITE_R_MODE is
+ * always ZERO. NV_point_sprite adds the S and R modes.
+ */
if (ctx->Extensions.NV_point_sprite) {
GLenum value = (GLenum) params[0];
if (value != GL_ZERO && value != GL_S && value != GL_R) {
return;
}
break;
+ case GL_POINT_SPRITE_COORD_ORIGIN:
+ if (ctx->Extensions.ARB_point_sprite) {
+ GLenum value = (GLenum) params[0];
+ if (value != GL_LOWER_LEFT && value != GL_UPPER_LEFT) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)");
+ return;
+ }
+ if (ctx->Point.SpriteOrigin == value)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.SpriteOrigin = value;
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ break;
default:
_mesa_error( ctx, GL_INVALID_ENUM,
"glPointParameterf[v]{EXT,ARB}(pname)" );
if (ctx->Driver.PointParameterfv)
(*ctx->Driver.PointParameterfv)(ctx, pname, params);
}
+#endif
+
+
+
+/**
+ * Update derived point-related state.
+ */
+void
+_mesa_update_point(GLcontext *ctx)
+{
+ /* clamp to user-specified limits now, clamp to ctx->Const.Min/Max
+ * limits during rasterization.
+ */
+ ctx->Point._Size = CLAMP(ctx->Point.Size,
+ ctx->Point.MinSize,
+ ctx->Point.MaxSize);
+
+ if (ctx->Point._Size == 1.0F)
+ ctx->_TriangleCaps &= ~DD_POINT_SIZE;
+ else
+ ctx->_TriangleCaps |= DD_POINT_SIZE;
+
+ ctx->Point._Attenuated = (ctx->Point.Params[0] != 1.0 ||
+ ctx->Point.Params[1] != 0.0 ||
+ ctx->Point.Params[2] != 0.0);
+
+ if (ctx->Point._Attenuated)
+ ctx->_TriangleCaps |= DD_POINT_ATTEN;
+ else
+ ctx->_TriangleCaps &= ~DD_POINT_ATTEN;
+}
+
+
+
+/**
+ * Initialize the context point state.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes __GLcontextRec::Point and point related constants in
+ * __GLcontextRec::Const.
+ */
+void
+_mesa_init_point(GLcontext *ctx)
+{
+ GLuint i;
+
+ ctx->Point.SmoothFlag = GL_FALSE;
+ ctx->Point.Size = 1.0;
+ ctx->Point._Size = 1.0;
+ ctx->Point.Params[0] = 1.0;
+ ctx->Point.Params[1] = 0.0;
+ ctx->Point.Params[2] = 0.0;
+ ctx->Point._Attenuated = GL_FALSE;
+ ctx->Point.MinSize = 0.0;
+ ctx->Point.MaxSize
+ = MAX2(ctx->Const.MaxPointSize, ctx->Const.MaxPointSizeAA);
+ ctx->Point.Threshold = 1.0;
+ ctx->Point.PointSprite = GL_FALSE; /* GL_ARB/NV_point_sprite */
+ ctx->Point.SpriteRMode = GL_ZERO; /* GL_NV_point_sprite (only!) */
+ ctx->Point.SpriteOrigin = GL_UPPER_LEFT; /* GL_ARB_point_sprite */
+ for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
+ ctx->Point.CoordReplace[i] = GL_FALSE; /* GL_ARB/NV_point_sprite */
+ }
+}
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