// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.

#include <mbgl/programs/collision_circle_program.hpp>
#include <mbgl/programs/gl/preludes.hpp>
#include <mbgl/programs/gl/shader_source.hpp>
#include <mbgl/gl/program.hpp>

namespace mbgl {
namespace programs {
namespace gl {

template <typename>
struct ShaderSource;

template <>
struct ShaderSource<CollisionCircleProgram> {
    static constexpr const char* name = "collision_circle";
    static constexpr const uint8_t hash[8] = { 0x99, 0x2e, 0xad, 0x8c, 0xd3, 0x88, 0xae, 0x82 };
    static constexpr const auto vertexOffset = 10858;
    static constexpr const auto fragmentOffset = 11774;
};

constexpr const char* ShaderSource<CollisionCircleProgram>::name;
constexpr const uint8_t ShaderSource<CollisionCircleProgram>::hash[8];

} // namespace gl
} // namespace programs

namespace gfx {

template <>
std::unique_ptr<Program<CollisionCircleProgram>>
Context::createProgram<gl::Context>(const ProgramParameters& programParameters) {
    return std::make_unique<gl::Program<CollisionCircleProgram>>(programParameters);
}

} // namespace gfx
} // namespace mbgl

// Uncompressed source of collision_circle.vertex.glsl:
/*
attribute vec2 a_pos;
attribute vec2 a_anchor_pos;
attribute vec2 a_extrude;
attribute vec2 a_placed;

uniform mat4 u_matrix;
uniform vec2 u_extrude_scale;
uniform float u_camera_to_center_distance;

varying float v_placed;
varying float v_notUsed;
varying float v_radius;

varying vec2 v_extrude;
varying vec2 v_extrude_scale;

void main() {
    vec4 projectedPoint = u_matrix * vec4(a_anchor_pos, 0, 1);
    highp float camera_to_anchor_distance = projectedPoint.w;
    highp float collision_perspective_ratio = clamp(
        0.5 + 0.5 * (u_camera_to_center_distance / camera_to_anchor_distance),
        0.0, // Prevents oversized near-field circles in pitched/overzoomed tiles
        4.0);

    gl_Position = u_matrix * vec4(a_pos, 0.0, 1.0);

    highp float padding_factor = 1.2; // Pad the vertices slightly to make room for anti-alias blur
    gl_Position.xy += a_extrude * u_extrude_scale * padding_factor * gl_Position.w * collision_perspective_ratio;

    v_placed = a_placed.x;
    v_notUsed = a_placed.y;
    v_radius = abs(a_extrude.y); // We don't pitch the circles, so both units of the extrusion vector are equal in magnitude to the radius

    v_extrude = a_extrude * padding_factor;
    v_extrude_scale = u_extrude_scale * u_camera_to_center_distance * collision_perspective_ratio;
}

*/

// Uncompressed source of collision_circle.fragment.glsl:
/*
uniform float u_overscale_factor;

varying float v_placed;
varying float v_notUsed;
varying float v_radius;
varying vec2 v_extrude;
varying vec2 v_extrude_scale;

void main() {
    float alpha = 0.5;

    // Red = collision, hide label
    vec4 color = vec4(1.0, 0.0, 0.0, 1.0) * alpha;

    // Blue = no collision, label is showing
    if (v_placed > 0.5) {
        color = vec4(0.0, 0.0, 1.0, 0.5) * alpha;
    }

    if (v_notUsed > 0.5) {
        // This box not used, fade it out
        color *= .2;
    }

    float extrude_scale_length = length(v_extrude_scale);
    float extrude_length = length(v_extrude) * extrude_scale_length;
    float stroke_width = 15.0 * extrude_scale_length / u_overscale_factor;
    float radius = v_radius * extrude_scale_length;

    float distance_to_edge = abs(extrude_length - radius);
    float opacity_t = smoothstep(-stroke_width, 0.0, -distance_to_edge);

    gl_FragColor = opacity_t * color;
}

*/