#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\digitaluniverse\shaders\billboard_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\digitaluniverse\shaders\billboard_fs.glsl

flat in vec4 gs_colorMap;
flat in float vs_screenSpaceDepth;
in vec2 texCoord;
in float ta;

uniform float alphaValue; // opacity
uniform vec3 color;
uniform sampler2D spriteTexture;
uniform bool hasColorMap;
uniform float fadeInValue;

Fragment getFragment() {
    vec4 textureColor = texture(spriteTexture, texCoord);
    
    if (textureColor.a == 0.f || gs_colorMap.a == 0.f || ta == 0.f || fadeInValue == 0.f)
    {
        discard;
    }

    vec4 fullColor = vec4(1.0);
    
    if (hasColorMap) {
        fullColor = vec4(
            gs_colorMap.rgb * textureColor.rgb,
            gs_colorMap.a * textureColor.a * alphaValue
        );
    }
    else {
        fullColor = vec4(color.rgb * textureColor.rgb, textureColor.a * alphaValue);
    }

    fullColor.a *= fadeInValue * ta;
    
    float textureOpacity = dot(fullColor.rgb, vec3(1.0));
    if (fullColor.a == 0.f || textureOpacity == 0.0) {
        discard;
    }

    Fragment frag;
    frag.color = fullColor;
    frag.depth = vs_screenSpaceDepth;
    // Setting the position of the billboards to not interact
    // with the ATM.
    frag.gPosition = vec4(-1e32, -1e32, -1e32, 1.0);
    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
