Texture2D<uint4> tex1 : register(t0);
SamplerState _tex1_sampler : register(s0);

static float2 vUV;
static float4 fragColor;
static float4 vTintWith565Multiplier;

struct SPIRV_Cross_Input
{
    float2 vUV : TEXCOORD0;
    float4 vTintWith565Multiplier : TEXCOORD1;
};

struct SPIRV_Cross_Output
{
    float4 fragColor : SV_Target0;
};

float3 unpackRGB565(int rgb5)
{
    return float3(rgb5.xxx & int3(63488, 2016, 31));
}

void frag_main()
{
    if (ddx(vUV).x <= 0.00048828125f)
    {
        float2 coord = floor(vUV * 2048.0f);
        int rgb5 = int(tex1.Load(int3(int2(coord), 0)).x);
        int param = rgb5;
        float3 _69 = unpackRGB565(param) * vTintWith565Multiplier.xyz;
        fragColor.x = _69.x;
        fragColor.y = _69.y;
        fragColor.z = _69.z;
    }
    else
    {
        float2 chunkID = floor(vUV * 64.0f);
        float2 pixelOffset = (vUV * 64.0f) - chunkID;
        float2 f = (pixelOffset * 32.0f) - 0.5f.xx;
        float2 uv0 = floor(f);
        float2 uv1 = uv0 + 1.0f.xx;
        f -= uv0;
        uv0 = max(uv0, 0.0f.xx);
        uv1 = min(uv1, 31.0f.xx);
        uv0 += (chunkID * 32.0f);
        uv1 += (chunkID * 32.0f);
        int c00 = int(tex1.Load(int3(int2(int(uv0.x), int(uv0.y)), 0)).x);
        int c10 = int(tex1.Load(int3(int2(int(uv1.x), int(uv0.y)), 0)).x);
        int c01 = int(tex1.Load(int3(int2(int(uv0.x), int(uv1.y)), 0)).x);
        int c11 = int(tex1.Load(int3(int2(int(uv1.x), int(uv1.y)), 0)).x);
        int param_1 = c00;
        int param_2 = c10;
        int param_3 = c01;
        int param_4 = c11;
        float3 c = lerp(lerp(unpackRGB565(param_1), unpackRGB565(param_2), f.x.xxx), lerp(unpackRGB565(param_3), unpackRGB565(param_4), f.x.xxx), f.y.xxx);
        float3 _206 = c * vTintWith565Multiplier.xyz;
        fragColor.x = _206.x;
        fragColor.y = _206.y;
        fragColor.z = _206.z;
    }
    fragColor.w = vTintWith565Multiplier.w;
}

SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
{
    vUV = stage_input.vUV;
    vTintWith565Multiplier = stage_input.vTintWith565Multiplier;
    frag_main();
    SPIRV_Cross_Output stage_output;
    stage_output.fragColor = fragColor;
    return stage_output;
}