// renderglsl.h
//
// Functions for rendering objects using dynamically generated GLSL shaders.
//
// Copyright (C) 2006-2020, the Celestia Development Team
// Original version by Chris Laurel <claurel@gmail.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 2
// of the License, or (at your option) any later version.

#ifndef _CELENGINE_RENDERGLSL_H_
#define _CELENGINE_RENDERGLSL_H_

#include <celengine/lightenv.h>
#include <Eigen/Geometry>

class Renderer;

void renderEllipsoid_GLSL(const RenderInfo& ri,
                       const LightingState& ls,
                       Atmosphere* atmosphere,
                       float cloudTexOffset,
                       const Eigen::Vector3f& semiAxes,
                       unsigned int textureRes,
                       uint64_t renderFlags,
                       const Eigen::Quaternionf& planetOrientation,
                       const celmath::Frustum& frustum,
                       const Matrices &m,
                       const Renderer* renderer);

void renderGeometry_GLSL(Geometry* geometry,
                         const RenderInfo& ri,
                         ResourceHandle texOverride,
                         const LightingState& ls,
                         const Atmosphere* atmosphere,
                         float geometryScale,
                         uint64_t renderFlags,
                         const Eigen::Quaternionf& planetOrientation,
                         double tsec,
                         const Matrices &m,
                         const Renderer* renderer);

void renderClouds_GLSL(const RenderInfo& ri,
                       const LightingState& ls,
                       Atmosphere* atmosphere,
                       Texture* cloudTex,
                       Texture* cloudNormalMap,
                       float texOffset,
                       const Eigen::Vector3f& semiAxes,
                       unsigned int textureRes,
                       uint64_t renderFlags,
                       const Eigen::Quaternionf& planetOrientation,
                       const celmath::Frustum& frustum,
                       const Matrices &m,
                       const Renderer* renderer);

void renderAtmosphere_GLSL(const RenderInfo& ri,
                           const LightingState& ls,
                           Atmosphere* atmosphere,
                           float radius,
                           const Eigen::Quaternionf& planetOrientation,
                           const celmath::Frustum& frustum,
                           const Matrices &m,
                           const Renderer* renderer);

void renderRings_GLSL(RingSystem& rings,
                      RenderInfo& ri,
                      const LightingState& ls,
                      float planetRadius,
                      float planetOblateness,
                      unsigned int textureResolution,
                      bool renderShadow,
                      float segmentSizeInPixels,
                      const Matrices &m,
                      const Renderer* renderer);

void renderGeometry_GLSL_Unlit(Geometry* geometry,
                               const RenderInfo& ri,
                               ResourceHandle texOverride,
                               float geometryScale,
                               uint64_t renderFlags,
                               const Eigen::Quaternionf& planetOrientation,
                               double tsec,
                               const Matrices &m,
                               const Renderer* renderer);

#endif // _CELENGINE_RENDERGLSL_H_