#include "glheader.h"
#include "colormac.h"
#include "context.h"
#include "fog.h"
#include "mtypes.h"
void
_mesa_Fogf(GLenum pname, GLfloat param)
{
_mesa_Fogfv(pname, ¶m);
}
void
_mesa_Fogi(GLenum pname, GLint param )
{
GLfloat fparam = (GLfloat) param;
_mesa_Fogfv(pname, &fparam);
}
void
_mesa_Fogiv(GLenum pname, const GLint *params )
{
GLfloat p[4];
switch (pname) {
case GL_FOG_MODE:
case GL_FOG_DENSITY:
case GL_FOG_START:
case GL_FOG_END:
case GL_FOG_INDEX:
case GL_FOG_COORDINATE_SOURCE_EXT:
p[0] = (GLfloat) *params;
break;
case GL_FOG_COLOR:
p[0] = INT_TO_FLOAT( params[0] );
p[1] = INT_TO_FLOAT( params[1] );
p[2] = INT_TO_FLOAT( params[2] );
p[3] = INT_TO_FLOAT( params[3] );
break;
default:
;
}
_mesa_Fogfv(pname, p);
}
void
_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:
case GL_EXP:
case GL_EXP2:
break;
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glFog" );
return;
}
if (ctx->Fog.Mode == m)
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
ctx->Fog.Mode = m;
break;
case GL_FOG_DENSITY:
if (*params<0.0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glFog" );
return;
}
if (ctx->Fog.Density == *params)
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
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;
case GL_FOG_END:
if (ctx->Fog.End == *params)
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
ctx->Fog.End = *params;
break;
case GL_FOG_INDEX:
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))
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
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 (!ctx->Extensions.EXT_fog_coord ||
(p != GL_FOG_COORDINATE_EXT && p != GL_FRAGMENT_DEPTH_EXT)) {
_mesa_error(ctx, GL_INVALID_ENUM, "glFog");
return;
}
if (ctx->Fog.FogCoordinateSource == p)
return;
FLUSH_VERTICES(ctx, _NEW_FOG);
ctx->Fog.FogCoordinateSource = p;
break;
}
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glFog" );
return;
}
if (ctx->Driver.Fogfv) {
(*ctx->Driver.Fogfv)( ctx, pname, params );
}
}