ref: gl: fix overbrights with VBO

ref/gl/gl_rmain.c

@@ -1003,11 +1003,22 @@ void R_GammaChanged( qboolean do_reset_gamma )
 
 static void R_CheckGamma( void )
 {
+	qboolean rebuild = false;
+
 	if( FBitSet( gl_overbright.flags, FCVAR_CHANGED ))
 	{
-		R_GammaChanged( false );
+		rebuild = true;
 		ClearBits( gl_overbright.flags, FCVAR_CHANGED );
 	}
+
+	if( gl_overbright.value && FBitSet( r_vbo.flags, FCVAR_CHANGED ))
+	{
+		rebuild = true;
+		ClearBits( r_vbo.flags, FCVAR_CHANGED );
+	}
+
+	if( rebuild )
+		R_GammaChanged( false );
 }
 
 /*

ref/gl/gl_rsurf.c

@@ -749,7 +749,7 @@ static void R_BuildLightMap( msurface_t *surf, byte *dest, int stride, qboolean
 	tmax = ( info->lightextents[1] / sample_size ) + 1;
 	size = smax * tmax;
 	if( gl_overbright.value )
-		lightscale = 256;
+		lightscale = r_vbo.value ? 171 : 256;
 	else lightscale = ( pow( 2.0f, 1.0f / v_lightgamma->value ) * 256 ) + 0.5;
 
 	lm = surf->samples;
@@ -2217,17 +2217,22 @@ static void R_SetLightmap( void )
 	if( mtst.skiptexture )
 		return;
 
-	/*if( gl_overbright->integer )
+	if( gl_overbright.value )
 	{
+		// GLfloat color[4] = { 128.0f / 192.0f, 128.0f / 192.0f, 128.0f / 192.0f, 1.0f };
+
 		pglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB );
 		pglTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE );
 		pglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PREVIOUS_ARB );
 		pglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_TEXTURE );
 		pglTexEnvi( GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 2 );
-
+		// doesn't work here for some reason
+		// pglTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, color );
 	}
-	else*/
+	else
+	{
 		pglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
+	}
 	pglTexCoordPointer( 2, GL_FLOAT, sizeof( vbovertex_t ), (void*)offsetof(vbovertex_t, lm_tc ) );
 }