-/* $Id: fog.c,v 1.32 2001/01/05 02:26:48 keithw Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
*
- * 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"),
* 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.
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 "colormac.h"
#include "context.h"
#include "fog.h"
+#include "macros.h"
#include "mtypes.h"
-#endif
-void
+void GLAPIENTRY
_mesa_Fogf(GLenum pname, GLfloat param)
{
- _mesa_Fogfv(pname, ¶m);
+ GLfloat fparam[4];
+ fparam[0] = param;
+ fparam[1] = fparam[2] = fparam[3] = 0.0F;
+ _mesa_Fogfv(pname, fparam);
}
-void
+void GLAPIENTRY
_mesa_Fogi(GLenum pname, GLint param )
{
- GLfloat fparam = (GLfloat) param;
- _mesa_Fogfv(pname, &fparam);
+ GLfloat fparam[4];
+ fparam[0] = (GLfloat) param;
+ fparam[1] = fparam[2] = fparam[3] = 0.0F;
+ _mesa_Fogfv(pname, fparam);
}
-void
+void GLAPIENTRY
_mesa_Fogiv(GLenum pname, const GLint *params )
{
GLfloat p[4];
case GL_FOG_END:
case GL_FOG_INDEX:
case GL_FOG_COORDINATE_SOURCE_EXT:
+ case GL_FOG_DISTANCE_MODE_NV:
p[0] = (GLfloat) *params;
break;
case GL_FOG_COLOR:
break;
default:
/* Error will be caught later in _mesa_Fogfv */
- ;
+ ASSIGN_4V(p, 0.0F, 0.0F, 0.0F, 0.0F);
}
_mesa_Fogfv(pname, p);
}
-void
+void GLAPIENTRY
_mesa_Fogfv( GLenum pname, const GLfloat *params )
{
GET_CURRENT_CONTEXT(ctx);
GLenum m;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
switch (pname) {
case GL_FOG_MODE:
m = (GLenum) (GLint) *params;
switch (m) {
case GL_LINEAR:
+ ctx->Fog._PackedMode = FOG_LINEAR;
+ break;
case GL_EXP:
+ ctx->Fog._PackedMode = FOG_EXP;
+ break;
case GL_EXP2:
+ ctx->Fog._PackedMode = FOG_EXP2;
break;
default:
- gl_error( ctx, GL_INVALID_ENUM, "glFog" );
+ _mesa_error( ctx, GL_INVALID_ENUM, "glFog" );
return;
}
if (ctx->Fog.Mode == m)
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
ctx->Fog.Mode = m;
+ ctx->Fog._PackedEnabledMode = ctx->Fog.Enabled ?
+ ctx->Fog._PackedMode : FOG_NONE;
break;
case GL_FOG_DENSITY:
- if (*params<0.0) {
- gl_error( ctx, GL_INVALID_VALUE, "glFog" );
+ if (*params<0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glFog" );
return;
}
if (ctx->Fog.Density == *params)
ctx->Fog.Density = *params;
break;
case GL_FOG_START:
- if (ctx->Fog.Start == *params)
- return;
- FLUSH_VERTICES(ctx, _NEW_FOG);
- ctx->Fog.Start = *params;
- break;
+ if (ctx->Fog.Start == *params)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.Start = *params;
+ break;
case GL_FOG_END:
- if (ctx->Fog.End == *params)
- return;
- FLUSH_VERTICES(ctx, _NEW_FOG);
- ctx->Fog.End = *params;
- break;
+ if (ctx->Fog.End == *params)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.End = *params;
+ break;
case GL_FOG_INDEX:
+ if (ctx->API != API_OPENGL_COMPAT)
+ goto invalid_pname;
if (ctx->Fog.Index == *params)
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
ctx->Fog.Index = *params;
break;
case GL_FOG_COLOR:
- if (TEST_EQ_4V(ctx->Fog.Color, params))
+ if (TEST_EQ_4V(ctx->Fog.Color, params))
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
- ctx->Fog.Color[0] = params[0];
- ctx->Fog.Color[1] = params[1];
- ctx->Fog.Color[2] = params[2];
- ctx->Fog.Color[3] = params[3];
+ ctx->Fog.ColorUnclamped[0] = params[0];
+ ctx->Fog.ColorUnclamped[1] = params[1];
+ ctx->Fog.ColorUnclamped[2] = params[2];
+ ctx->Fog.ColorUnclamped[3] = params[3];
+ ctx->Fog.Color[0] = CLAMP(params[0], 0.0F, 1.0F);
+ ctx->Fog.Color[1] = CLAMP(params[1], 0.0F, 1.0F);
+ ctx->Fog.Color[2] = CLAMP(params[2], 0.0F, 1.0F);
+ ctx->Fog.Color[3] = CLAMP(params[3], 0.0F, 1.0F);
break;
case GL_FOG_COORDINATE_SOURCE_EXT: {
- GLenum p = (GLenum)(GLint) *params;
- if (p != GL_FOG_COORDINATE_EXT && p != GL_FRAGMENT_DEPTH_EXT) {
- gl_error( ctx, GL_INVALID_ENUM, "glFog" );
+ GLenum p = (GLenum) (GLint) *params;
+ if (ctx->API != API_OPENGL_COMPAT ||
+ (p != GL_FOG_COORDINATE_EXT && p != GL_FRAGMENT_DEPTH_EXT)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glFog");
return;
}
if (ctx->Fog.FogCoordinateSource == p)
ctx->Fog.FogCoordinateSource = p;
break;
}
+ case GL_FOG_DISTANCE_MODE_NV: {
+ GLenum p = (GLenum) (GLint) *params;
+ if (ctx->API != API_OPENGL_COMPAT || !ctx->Extensions.NV_fog_distance ||
+ (p != GL_EYE_RADIAL_NV && p != GL_EYE_PLANE && p != GL_EYE_PLANE_ABSOLUTE_NV)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glFog");
+ return;
+ }
+ if (ctx->Fog.FogDistanceMode == p)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.FogDistanceMode = p;
+ break;
+ }
default:
- gl_error( ctx, GL_INVALID_ENUM, "glFog" );
- return;
+ goto invalid_pname;
}
if (ctx->Driver.Fogfv) {
- (*ctx->Driver.Fogfv)( ctx, pname, params );
+ ctx->Driver.Fogfv( ctx, pname, params );
}
+
+ return;
+
+invalid_pname:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glFog" );
+ return;
}
+/**********************************************************************/
+/***** Initialization *****/
+/**********************************************************************/
+
+void _mesa_init_fog( struct gl_context * ctx )
+{
+ /* Fog group */
+ ctx->Fog.Enabled = GL_FALSE;
+ ctx->Fog.Mode = GL_EXP;
+ ctx->Fog._PackedMode = FOG_EXP;
+ ctx->Fog._PackedEnabledMode = FOG_NONE;
+ ASSIGN_4V( ctx->Fog.Color, 0.0, 0.0, 0.0, 0.0 );
+ ASSIGN_4V( ctx->Fog.ColorUnclamped, 0.0, 0.0, 0.0, 0.0 );
+ ctx->Fog.Index = 0.0;
+ ctx->Fog.Density = 1.0;
+ ctx->Fog.Start = 0.0;
+ ctx->Fog.End = 1.0;
+ ctx->Fog.ColorSumEnabled = GL_FALSE;
+ ctx->Fog.FogCoordinateSource = GL_FRAGMENT_DEPTH_EXT;
+ ctx->Fog.FogDistanceMode = GL_EYE_PLANE_ABSOLUTE_NV;
+}
projects / mesa.git / blobdiff