/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * Contributor(s): 2004-2006, Blender Foundation, full recode
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/render/intern/include/pixelshading.h
 *  \ingroup render
 *
 * These functions determine what actual color a pixel will have.
 */

#ifndef __PIXELSHADING_H__
#define __PIXELSHADING_H__


/**
 * Render the pixel at (x,y) for object ap. Apply the jitter mask. 
 * Output is given in float collector[4]. The type vector:
 * t[0] - min. distance
 * t[1] - face/halo index
 * t[2] - jitter mask                     
 * t[3] - type ZB_POLY or ZB_HALO
 * t[4] - max. distance
 * mask is pixel coverage in bits
 * \return pointer to the object
 */
int shadeHaloFloat(HaloRen *har, 
                   float *col, int zz,
                   float dist, float xn,
                   float yn, short flarec);

/**
 * Render the sky at pixel (x, y).
 */
void shadeSkyPixel(float collector[4], float fx, float fy, short thread);
void shadeSkyView(float col_r[3], const float rco[3], const float view[3], const float dxyview[2], short thread);
void shadeAtmPixel(struct SunSky *sunsky, float *collector, float fx, float fy, float distance);
void shadeSunView(float col_r[3], const float view[3]);
/* ------------------------------------------------------------------------- */

#endif