linear_gradient_fill.frag

#include <metal_stdlib>
#include <simd/simd.h>

using namespace metal;

struct FragInfo
{
    float2 start_point;
    float2 end_point;
    float tile_mode;
    float texture_sampler_y_coord_scale;
    float alpha;
    float2 half_texel;
};

struct linear_gradient_fill_fragment_main_out
{
    float4 frag_color [[color(0)]];
};

struct linear_gradient_fill_fragment_main_in
{
    float2 v_position [[user(locn0)]];
};

fragment linear_gradient_fill_fragment_main_out linear_gradient_fill_fragment_main(linear_gradient_fill_fragment_main_in in [[stage_in]], constant FragInfo& frag_info [[buffer(0)]], texture2d<float> texture_sampler [[texture(0)]], sampler texture_samplerSmplr [[sampler(0)]])
{
    linear_gradient_fill_fragment_main_out out = {};
    float2 _234 = frag_info.end_point - frag_info.start_point;
    float _249 = dot(in.v_position - frag_info.start_point, _234) / dot(_234, _234);
    float4 _518;
    do
    {
        bool _327 = frag_info.tile_mode == 3.0;
        bool _340;
        if (_327)
        {
            bool _331 = _249 < 0.0;
            bool _338;
            if (!_331)
            {
                _338 = _249 >= 1.0;
            }
            else
            {
                _338 = _331;
            }
            _340 = _338;
        }
        else
        {
            _340 = _327;
        }
        bool _359;
        if (!_340)
        {
            _359 = _327 ? false : _327;
        }
        else
        {
            _359 = _340;
        }
        if (_359)
        {
            _518 = float4(0.0);
            break;
        }
        bool _391 = frag_info.tile_mode == 0.0;
        float _511;
        if (_391)
        {
            _511 = fast::clamp(_249, 0.0, 1.0);
        }
        else
        {
            float _512;
            if (frag_info.tile_mode == 1.0)
            {
                _512 = fract(_249);
            }
            else
            {
                float _513;
                if (frag_info.tile_mode == 2.0)
                {
                    float _406 = _249 - 1.0;
                    _513 = abs(fma(-2.0, floor(_406 * 0.5), _406) - 1.0);
                }
                else
                {
                    _513 = _249;
                }
                _512 = _513;
            }
            _511 = _512;
        }
        float _514;
        if (_391)
        {
            _514 = 0.5;
        }
        else
        {
            float _515;
            if (frag_info.tile_mode == 1.0)
            {
                _515 = fract(0.5);
            }
            else
            {
                float _516;
                if (frag_info.tile_mode == 2.0)
                {
                    _516 = abs(fma(-2.0, floor(-0.25), -0.5) - 1.0);
                }
                else
                {
                    _516 = 0.5;
                }
                _515 = _516;
            }
            _514 = _515;
        }
        float _474 = mix(frag_info.half_texel.y, 1.0 - frag_info.half_texel.y, _514);
        float2 _525 = float2(mix(frag_info.half_texel.x, 1.0 - frag_info.half_texel.x, _511), _474);
        float2 _517;
        if (frag_info.texture_sampler_y_coord_scale < 0.0)
        {
            float2 _510 = _525;
            _510.y = 1.0 - _474;
            _517 = _510;
        }
        else
        {
            _517 = _525;
        }
        _518 = texture_sampler.sample(texture_samplerSmplr, _517);
        break;
    } while(false);
    out.frag_color = _518;
    out.frag_color = float4(out.frag_color.xyz * out.frag_color.w, out.frag_color.w) * frag_info.alpha;
    return out;