/*
 *
 *  Singe 3
 *  Copyright (C) 2006-2026 Scott Duensing <scott@kangaroopunch.com>
 *
 * 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 3
 * 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.
 *
 */

#ifndef SCENE_SHARED_H
#define SCENE_SHARED_H

// The limits and codes the scene's uniform blocks are laid out with, shared by the C side
// (scene.h, scene.c) and the shaders (shaders/scene.hlsl), so the two cannot drift apart.
// Preprocessor definitions only:  this file is read by DXC as well as the C compiler.

// Sizes of the uniform arrays.
#define MAX_LIGHTS      8               // Lights the fragment shader sees per frame
#define MAX_JOINTS      128             // Joint matrices per skinned draw
#define MAX_SHADOWS     MAX_LIGHTS      // Every light may cast; the arrays are sized to the lights in use
#define MAX_MORPHS      8               // Active morph targets per draw
#define MAX_CASCADES    4               // Cascades of a directional light's shadow
#define SH_COEFFICIENTS 9               // Spherical harmonics to second order

// A shadow slot's kind (shadowInfo[slot].x).
#define SHADOW_NONE     0
#define SHADOW_MAP      1               // One map:  a spot light, or a directional light without cascades
#define SHADOW_CUBE     2               // Six faces:  a point light
#define SHADOW_CASCADE  3               // A directional light's shadow split along the camera's view

// A light's kind (positionType.w).
#define LIGHT_TYPE_DIRECTIONAL 0
#define LIGHT_TYPE_POINT       1
#define LIGHT_TYPE_SPOT        2

// The post pass's tone curve (postParams.y).
#define TONEMAP_CURVE_NONE     0
#define TONEMAP_CURVE_NEUTRAL  1
#define TONEMAP_CURVE_ACES     2

// What material.w says about the base texture.
#define TEXTURE_NONE    0
#define TEXTURE_SRGB    1               // A texture the sampler decodes to linear
#define TEXTURE_FEED    2               // A video frame or rendered view, sRGB, decoded in the shader

// How a draw turns to face the camera (the spare lane of its normal matrix, instanceMatrices).
#define BILLBOARD_MODE_NONE 0
#define BILLBOARD_MODE_ALL  1           // Its axes are the camera's
#define BILLBOARD_MODE_Y    2           // Turned about world +Y toward the eye only


#endif