-/* $Id: points.c,v 1.28 2001/01/14 06:14:21 keithw Exp $ */
+/**
+ * \file points.c
+ * Point operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.4
+ * Version: 5.1
*
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 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"),
*/
-#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
-
+/**
+ * Set the point size.
+ *
+ * \param size pointer diameter.
+ *
+ * \sa glPointSize().
+ *
+ * Verifies the parameter and updates gl_point_attrib::Size. On a change,
+ * flushes the vertices, updates the clamped point size and marks the
+ * DD_POINT_SIZE flag in __GLcontextRec::_TriangleCaps for the drivers if the
+ * size is different from one. Notifies the driver via
+ * the dd_function_table::PointSize callback.
+ */
void
_mesa_PointSize( GLfloat size )
{
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (size <= 0.0) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointSize" );
+ _mesa_error( ctx, GL_INVALID_VALUE, "glPointSize" );
return;
}
- if (ctx->Point.Size == size)
+ if (ctx->Point.Size == size)
return;
FLUSH_VERTICES(ctx, _NEW_POINT);
ctx->Point.Size = size;
- ctx->Point._Size = CLAMP(size,
+ ctx->Point._Size = CLAMP(size,
ctx->Const.MinPointSize,
ctx->Const.MaxPointSize);
}
+#if _HAVE_FULL_GL
+
+/*
+ * Added by GL_NV_point_sprite
+ */
+void
+_mesa_PointParameteriNV( GLenum pname, GLint param )
+{
+ const GLfloat value = (GLfloat) param;
+ _mesa_PointParameterfvEXT(pname, &value);
+}
+
+
+/*
+ * Added by GL_NV_point_sprite
+ */
+void
+_mesa_PointParameterivNV( GLenum pname, const GLint *params )
+{
+ const GLfloat value = (GLfloat) params[0];
+ _mesa_PointParameterfvEXT(pname, &value);
+}
+
+
+/*
+ * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
+ */
void
_mesa_PointParameterfEXT( GLenum pname, GLfloat param)
{
}
+
+/*
+ * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
+ */
void
_mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
{
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;
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;
}
}
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
break;
case GL_POINT_SIZE_MIN_EXT:
- if (*params < 0.0F) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
+ if (ctx->Extensions.EXT_point_parameters) {
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
+ return;
+ }
+ if (ctx->Point.MinSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MinSize = params[0];
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
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" );
+ if (ctx->Extensions.EXT_point_parameters) {
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
+ return;
+ }
+ if (ctx->Point.MaxSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MaxSize = params[0];
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
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" );
+ if (ctx->Extensions.EXT_point_parameters) {
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
+ return;
+ }
+ if (ctx->Point.Threshold == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.Threshold = params[0];
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ 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) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)");
+ return;
+ }
+ if (ctx->Point.SpriteRMode == value)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.SpriteRMode = value;
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
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" );
+ _mesa_error( ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)" );
return;
}
if (ctx->Driver.PointParameterfv)
(*ctx->Driver.PointParameterfv)(ctx, pname, params);
}
+#endif
+
+/**
+ * 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 )
+{
+ int i;
+
+ /* Point group */
+ 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 = ctx->Const.MaxPointSize;
+ ctx->Point.Threshold = 1.0;
+ ctx->Point.PointSprite = GL_FALSE; /* GL_ARB_point_sprite / GL_NV_point_sprite */
+ ctx->Point.SpriteRMode = GL_ZERO; /* GL_NV_point_sprite (only!) */
+ for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
+ ctx->Point.CoordReplace[i] = GL_FALSE; /* GL_ARB_point_sprite / GL_NV_point_sprite */
+ }
+}
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