// Code auto-generated by piet-gpu-derive

struct BboxRef {
    uint offset;
};

struct PointRef {
    uint offset;
};

struct SimpleGroupRef {
    uint offset;
};

struct PietCircleRef {
    uint offset;
};

struct PietStrokeLineRef {
    uint offset;
};

struct PietFillRef {
    uint offset;
};

struct PietStrokePolyLineRef {
    uint offset;
};

struct PietItemRef {
    uint offset;
};

struct Bbox {
    uvec4 bbox;
};

#define Bbox_size 8

BboxRef Bbox_index(BboxRef ref, uint index) {
    return BboxRef(ref.offset + index * Bbox_size);
}

struct Point {
    vec2 xy;
};

#define Point_size 8

PointRef Point_index(PointRef ref, uint index) {
    return PointRef(ref.offset + index * Point_size);
}

struct SimpleGroup {
    uint n_items;
    PietItemRef items;
    BboxRef bboxes;
};

#define SimpleGroup_size 12

SimpleGroupRef SimpleGroup_index(SimpleGroupRef ref, uint index) {
    return SimpleGroupRef(ref.offset + index * SimpleGroup_size);
}

struct PietCircle {
    uint rgba_color;
    Point center;
    float radius;
};

#define PietCircle_size 16

PietCircleRef PietCircle_index(PietCircleRef ref, uint index) {
    return PietCircleRef(ref.offset + index * PietCircle_size);
}

struct PietStrokeLine {
    uint flags;
    uint rgba_color;
    float width;
    Point start;
    Point end;
};

#define PietStrokeLine_size 28

PietStrokeLineRef PietStrokeLine_index(PietStrokeLineRef ref, uint index) {
    return PietStrokeLineRef(ref.offset + index * PietStrokeLine_size);
}

struct PietFill {
    uint flags;
    uint rgba_color;
    uint n_points;
    PointRef points;
};

#define PietFill_size 16

PietFillRef PietFill_index(PietFillRef ref, uint index) {
    return PietFillRef(ref.offset + index * PietFill_size);
}

struct PietStrokePolyLine {
    uint rgba_color;
    float width;
    uint n_points;
    PointRef points;
};

#define PietStrokePolyLine_size 16

PietStrokePolyLineRef PietStrokePolyLine_index(PietStrokePolyLineRef ref, uint index) {
    return PietStrokePolyLineRef(ref.offset + index * PietStrokePolyLine_size);
}

#define PietItem_Circle 0
#define PietItem_Line 1
#define PietItem_Fill 2
#define PietItem_Poly 3
#define PietItem_size 32

PietItemRef PietItem_index(PietItemRef ref, uint index) {
    return PietItemRef(ref.offset + index * PietItem_size);
}

Bbox Bbox_read(BboxRef ref) {
    uint ix = ref.offset >> 2;
    uint raw0 = scene[ix + 0];
    uint raw1 = scene[ix + 1];
    Bbox s;
    s.bbox = uvec4(raw0 & 0xffff, raw0 >> 16, raw1 & 0xffff, raw1 >> 16);
    return s;
}

Point Point_read(PointRef ref) {
    uint ix = ref.offset >> 2;
    uint raw0 = scene[ix + 0];
    uint raw1 = scene[ix + 1];
    Point s;
    s.xy = vec2(uintBitsToFloat(raw0), uintBitsToFloat(raw1));
    return s;
}

SimpleGroup SimpleGroup_read(SimpleGroupRef ref) {
    uint ix = ref.offset >> 2;
    uint raw0 = scene[ix + 0];
    uint raw1 = scene[ix + 1];
    uint raw2 = scene[ix + 2];
    SimpleGroup s;
    s.n_items = raw0;
    s.items = PietItemRef(raw1);
    s.bboxes = BboxRef(raw2);
    return s;
}

PietCircle PietCircle_read(PietCircleRef ref) {
    uint ix = ref.offset >> 2;
    uint raw0 = scene[ix + 0];
    uint raw3 = scene[ix + 3];
    PietCircle s;
    s.rgba_color = raw0;
    s.center = Point_read(PointRef(ref.offset + 4));
    s.radius = uintBitsToFloat(raw3);
    return s;
}

PietStrokeLine PietStrokeLine_read(PietStrokeLineRef ref) {
    uint ix = ref.offset >> 2;
    uint raw0 = scene[ix + 0];
    uint raw1 = scene[ix + 1];
    uint raw2 = scene[ix + 2];
    PietStrokeLine s;
    s.flags = raw0;
    s.rgba_color = raw1;
    s.width = uintBitsToFloat(raw2);
    s.start = Point_read(PointRef(ref.offset + 12));
    s.end = Point_read(PointRef(ref.offset + 20));
    return s;
}

PietFill PietFill_read(PietFillRef ref) {
    uint ix = ref.offset >> 2;
    uint raw0 = scene[ix + 0];
    uint raw1 = scene[ix + 1];
    uint raw2 = scene[ix + 2];
    uint raw3 = scene[ix + 3];
    PietFill s;
    s.flags = raw0;
    s.rgba_color = raw1;
    s.n_points = raw2;
    s.points = PointRef(raw3);
    return s;
}

PietStrokePolyLine PietStrokePolyLine_read(PietStrokePolyLineRef ref) {
    uint ix = ref.offset >> 2;
    uint raw0 = scene[ix + 0];
    uint raw1 = scene[ix + 1];
    uint raw2 = scene[ix + 2];
    uint raw3 = scene[ix + 3];
    PietStrokePolyLine s;
    s.rgba_color = raw0;
    s.width = uintBitsToFloat(raw1);
    s.n_points = raw2;
    s.points = PointRef(raw3);
    return s;
}

uint PietItem_tag(PietItemRef ref) {
    return scene[ref.offset >> 2];
}

PietCircle PietItem_Circle_read(PietItemRef ref) {
    return PietCircle_read(PietCircleRef(ref.offset + 4));
}

PietStrokeLine PietItem_Line_read(PietItemRef ref) {
    return PietStrokeLine_read(PietStrokeLineRef(ref.offset + 4));
}

PietFill PietItem_Fill_read(PietItemRef ref) {
    return PietFill_read(PietFillRef(ref.offset + 4));
}

PietStrokePolyLine PietItem_Poly_read(PietItemRef ref) {
    return PietStrokePolyLine_read(PietStrokePolyLineRef(ref.offset + 4));
}