#version 460  core
; // preprocessor add semicolon to isolate error messages
#line 1 1 // C:\os\clean\OpenSpace-0.16.0\shaders\framebuffer\renderframebuffer.frag
/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
 * software and associated documentation files (the "Software"), to deal in the Software *
 * without restriction, including without limitation the rights to use, copy, modify,    *
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
 * permit persons to whom the Software is furnished to do so, subject to the following   *
 * conditions:                                                                           *
 *                                                                                       *
 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
 ****************************************************************************************/

; // preprocessor add semicolon to isolate error messages
#line 1 2 // C:\os\clean\OpenSpace-0.16.0\shaders\floatoperations.glsl
/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
 * software and associated documentation files (the "Software"), to deal in the Software *
 * without restriction, including without limitation the rights to use, copy, modify,    *
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
 * permit persons to whom the Software is furnished to do so, subject to the following   *
 * conditions:                                                                           *
 *                                                                                       *
 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
 ****************************************************************************************/

#ifndef _FLOATOPERATIONS_GLSL_
#define _FLOATOPERATIONS_GLSL_

/**
 * Convert a positive floating point distance [0, 10^27]
 * (size of observable universe)
 * to a float in the range [-1, 1], suitable for depth buffer storage.
 * Note: This needs to be a monotonic function, so that the value can
 * still be used for depth comparison.
 */
float normalizeFloat(float inpt) {
    if (inpt > 1.0) {
        return inpt / pow(10, 30);
    } else {
        return inpt - 1.0;
    }
}

float denormalizeFloat(float inpt) {
    if (inpt < 0.0) {
        return inpt + 1.0;
    } else {
        return inpt * pow(10, 30);
    }
}

/**
 * Compute the length of a vector.
 * Supporting huge vectors, where the square of any of the components is too large to be
 * represented as a float.
 */
float safeLength(vec4 v) {
    float m = max(max(max(abs(v.x), abs(v.y)), abs(v.z)), abs(v.w));
    if (m > 0.f) {
        return length(v / m) * m;
    } else {
        return 0.f;
    }
}

float safeLength(vec3 v) {
    float m = max(max(abs(v.x), abs(v.y)), abs(v.z));
    if (m > 0.f) {
        return length(v / m) * m;
    } else {
        return 0.f;
    }
}

float safeLength(vec2 v) {
    float m = max(abs(v.x), abs(v.y));
    if (m > 0.f) {
        return length(v / m) * m;
    } else {
        return 0.f;
    }
}

/**
 * Normalize a vector
 * Supporting huge vectors, where the square of any of the components is too large to be
 * represent as a float.
 */
vec3 safeNormalize(vec3 v) {
    float m = max(max(abs(v.x), abs(v.y)), abs(v.z));
    return normalize(v / m);
}

#endif // _FLOATOPERATIONS_GLSL_
; // preprocessor add semicolon to isolate error messages
#line 26 1 // C:\os\clean\OpenSpace-0.16.0\shaders\framebuffer\renderframebuffer.frag
; // preprocessor add semicolon to isolate error messages
#line 1 3 // C:\os\clean\OpenSpace-0.16.0\modules\space\shaders\star_fs.glsl
/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
 * software and associated documentation files (the "Software"), to deal in the Software *
 * without restriction, including without limitation the rights to use, copy, modify,    *
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
 * permit persons to whom the Software is furnished to do so, subject to the following   *
 * conditions:                                                                           *
 *                                                                                       *
 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
 ****************************************************************************************/

; // preprocessor add semicolon to isolate error messages
#line 1 4 // C:\os\clean\OpenSpace-0.16.0\shaders\fragment.glsl
/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
 * software and associated documentation files (the "Software"), to deal in the Software *
 * without restriction, including without limitation the rights to use, copy, modify,    *
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
 * permit persons to whom the Software is furnished to do so, subject to the following   *
 * conditions:                                                                           *
 *                                                                                       *
 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
 ****************************************************************************************/

#ifndef _FRAGMENT_GLSL_
#define _FRAGMENT_GLSL_

#define BLEND_MODE_NORMAL 0u
#define BLEND_MODE_ADDITIVE 1u

struct Fragment {
    vec4 color;
    vec4 gPosition;
    vec4 gNormal;
    float depth;
    uint blend;
    bool forceFboRendering;
    bool disableLDR2HDR;
};

#endif
; // preprocessor add semicolon to isolate error messages
#line 26 3 // C:\os\clean\OpenSpace-0.16.0\modules\space\shaders\star_fs.glsl
; // preprocessor add semicolon to isolate error messages
#line 1 2 // C:\os\clean\OpenSpace-0.16.0\shaders\floatoperations.glsl
/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
 * software and associated documentation files (the "Software"), to deal in the Software *
 * without restriction, including without limitation the rights to use, copy, modify,    *
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
 * permit persons to whom the Software is furnished to do so, subject to the following   *
 * conditions:                                                                           *
 *                                                                                       *
 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
 ****************************************************************************************/

#ifndef _FLOATOPERATIONS_GLSL_
#define _FLOATOPERATIONS_GLSL_

/**
 * Convert a positive floating point distance [0, 10^27]
 * (size of observable universe)
 * to a float in the range [-1, 1], suitable for depth buffer storage.
 * Note: This needs to be a monotonic function, so that the value can
 * still be used for depth comparison.
 */
float normalizeFloat(float inpt) {
    if (inpt > 1.0) {
        return inpt / pow(10, 30);
    } else {
        return inpt - 1.0;
    }
}

float denormalizeFloat(float inpt) {
    if (inpt < 0.0) {
        return inpt + 1.0;
    } else {
        return inpt * pow(10, 30);
    }
}

/**
 * Compute the length of a vector.
 * Supporting huge vectors, where the square of any of the components is too large to be
 * represented as a float.
 */
float safeLength(vec4 v) {
    float m = max(max(max(abs(v.x), abs(v.y)), abs(v.z)), abs(v.w));
    if (m > 0.f) {
        return length(v / m) * m;
    } else {
        return 0.f;
    }
}

float safeLength(vec3 v) {
    float m = max(max(abs(v.x), abs(v.y)), abs(v.z));
    if (m > 0.f) {
        return length(v / m) * m;
    } else {
        return 0.f;
    }
}

float safeLength(vec2 v) {
    float m = max(abs(v.x), abs(v.y));
    if (m > 0.f) {
        return length(v / m) * m;
    } else {
        return 0.f;
    }
}

/**
 * Normalize a vector
 * Supporting huge vectors, where the square of any of the components is too large to be
 * represent as a float.
 */
vec3 safeNormalize(vec3 v) {
    float m = max(max(abs(v.x), abs(v.y)), abs(v.z));
    return normalize(v / m);
}

#endif // _FLOATOPERATIONS_GLSL_
; // preprocessor add semicolon to isolate error messages
#line 27 3 // C:\os\clean\OpenSpace-0.16.0\modules\space\shaders\star_fs.glsl

// keep in sync with renderablestars.h:ColorOption enum
const int COLOROPTION_COLOR = 0;
const int COLOROPTION_VELOCITY = 1;
const int COLOROPTION_SPEED = 2;
const int COLOROPTION_OTHERDATA = 3;
const int COLOROPTION_FIXEDCOLOR = 4;

uniform sampler1D colorTexture;
uniform sampler2D psfTexture;
uniform float alphaValue;

uniform vec3 fixedColor;

uniform int colorOption;

uniform sampler1D otherDataTexture;
uniform vec2 otherDataRange;
uniform bool filterOutOfRange;

in vec4 vs_position;
in vec2 psfCoords;
flat in vec4 ge_bvLumAbsMagAppMag;
flat in vec3 ge_velocity;
flat in float ge_speed;
flat in float ge_observationDistance;
flat in float gs_screenSpaceDepth;

vec4 bv2rgb(float bv) {
    // BV is [-0.4,2.0]
    float t = (bv + 0.4) / (2.0 + 0.4);
    return texture(colorTexture, t);
}

bool isOtherDataValueInRange() {
    float t = (ge_bvLumAbsMagAppMag.x - otherDataRange.x) / (otherDataRange.y - otherDataRange.x);
    return t >= 0.0 && t <= 1.0;
}
vec4 otherDataValue() {
    float t = (ge_bvLumAbsMagAppMag.x - otherDataRange.x) / (otherDataRange.y - otherDataRange.x);
    t = clamp(t, 0.0, 1.0);
    return texture(otherDataTexture, t);
}

Fragment getFragment() {
    // Something in the color calculations need to be changed because before it was dependent
    // on the gl blend functions since the abuffer was not involved

    vec4 color = vec4(0.0);
    switch (colorOption) {
        case COLOROPTION_COLOR:
            color = bv2rgb(ge_bvLumAbsMagAppMag.x);
            break;
        case COLOROPTION_VELOCITY:
            color = vec4(abs(ge_velocity), 0.5);
            break;
        case COLOROPTION_SPEED:
            // @TODO Include a transfer function here ---abock
            color = vec4(vec3(ge_speed), 0.5);
            break;
        case COLOROPTION_OTHERDATA:
            if (filterOutOfRange && !isOtherDataValueInRange()) {
                discard;
            }
            else {
                color = otherDataValue();
            }
            break;
        case COLOROPTION_FIXEDCOLOR:
            color = vec4(fixedColor, 1.0);
            break;
    }

    vec4 textureColor = texture(psfTexture, 0.5 * psfCoords + 0.5);
    vec4 fullColor = vec4(color.rgb, textureColor.a);
    fullColor.a *= alphaValue;
    
    if (fullColor.a < 0.001) {
        discard;
    }

    Fragment frag;
    frag.color = fullColor;
    frag.depth = gs_screenSpaceDepth;
    frag.gPosition = vs_position;
    frag.gNormal = vec4(0.0, 0.0, 0.0, 1.0);
    frag.disableLDR2HDR = true;
    
    return frag;
}
; // preprocessor add semicolon to isolate error messages
#line 27 1 // C:\os\clean\OpenSpace-0.16.0\shaders\framebuffer\renderframebuffer.frag

#define exposure 3.700000
#define disableHDRPipeline 0
#define DeltaError 0.013f
#define MaxValueColorBuffer 1E10

layout(location = 0) out vec4 _out_color_;
layout(location = 1) out vec4 gPosition;
layout(location = 2) out vec4 gNormal;

void main() {
    Fragment f  = getFragment();

    // Color is already in HDR space
    if (f.disableLDR2HDR || (disableHDRPipeline == 1)) {
        _out_color_ = f.color;
    } else {
        _out_color_ = vec4((log2(vec3(1.0) - (f.color.rgb - vec3(DeltaError)))/(-exposure)), f.color.a);
    }
    
    _out_color_.x = isnan(_out_color_.x) ? MaxValueColorBuffer : _out_color_.x;
    _out_color_.y = isnan(_out_color_.y) ? MaxValueColorBuffer : _out_color_.y;
    _out_color_.z = isnan(_out_color_.z) ? MaxValueColorBuffer : _out_color_.z;
    
    gPosition         = f.gPosition;
    gNormal           = f.gNormal;
     
    gl_FragDepth = normalizeFloat(f.depth);
}
; // preprocessor add semicolon to isolate error messages
#line 3 0 // C:\os\clean\OpenSpace-0.16.0\shaders\render.frag
