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// Tencent is pleased to support the open source community by making ncnn available.
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// Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
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// in compliance with the License. You may obtain a copy of the License at
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// https://opensource.org/licenses/BSD-3-Clause
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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#extension GL_EXT_shader_16bit_storage: require
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#if NCNN_fp16_arithmetic
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#extension GL_EXT_shader_explicit_arithmetic_types_float16: require
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layout (constant_id = 0) const int ndim = 0;
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#define shape_constant_id_offset 1
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layout (constant_id = shape_constant_id_offset + 0) const int dims = 0;
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layout (constant_id = shape_constant_id_offset + 1) const int w = 0;
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layout (constant_id = shape_constant_id_offset + 2) const int h = 0;
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layout (constant_id = shape_constant_id_offset + 3) const int d = 0;
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layout (constant_id = shape_constant_id_offset + 4) const int c = 0;
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layout (constant_id = shape_constant_id_offset + 5) const int cstep = 0;
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layout (constant_id = shape_constant_id_offset + 6) const int outdims = 0;
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layout (constant_id = shape_constant_id_offset + 7) const int outw = 0;
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layout (constant_id = shape_constant_id_offset + 8) const int outh = 0;
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layout (constant_id = shape_constant_id_offset + 9) const int outd = 0;
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layout (constant_id = shape_constant_id_offset + 10) const int outc = 0;
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layout (constant_id = shape_constant_id_offset + 11) const int outcstep = 0;
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layout (binding = 0) uniform unfp sampler3D bottom_blob_3d;
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layout (binding = 1, imfmtc1) writeonly uniform unfp image3D top_blob_3d;
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layout (binding = 0) readonly buffer bottom_blob { sfpvec4 bottom_blob_data[]; };
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layout (binding = 1) writeonly buffer top_blob { sfp top_blob_data[]; };
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layout (push_constant) uniform parameter
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int gx = int(gl_GlobalInvocationID.x);
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int gy = int(gl_GlobalInvocationID.y);
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int gz = int(gl_GlobalInvocationID.z);
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if (gx >= psc(w) || gy >= psc(h) * psc(d) || gz >= psc(c))
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i4 = gx * 4 + ivec4(0, 1, 2, 3);
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else if (psc(dims) == 2)
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i4 = (gy * 4) * psc(w) + gx + ivec4(0, 1, 2, 3) * psc(w);
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else if (psc(dims) == 3)
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i4 = (gz * 4) * psc(h) * psc(w) + gy * psc(w) + gx + ivec4(0, 1, 2, 3) * psc(h) * psc(w);
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else // if (psc(dims) == 4)
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i4 = (gz * 4) * psc(d) * psc(h) * psc(w) + gy * psc(w) + gx + ivec4(0, 1, 2, 3) * psc(d) * psc(h) * psc(w);
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int size = psc(outw) * psc(outh);
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y4 = i4 % size / psc(outw);
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x4 = i4 % size % psc(outw);
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int size = psc(outw) * psc(outh) * psc(outd);
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int dsize = psc(outw) * psc(outh);
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ivec4 yd4 = i4 % size / dsize;
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ivec4 yh4 = i4 % size % dsize / psc(outw);
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x4 = i4 % size % dsize % psc(outw);
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y4 = yd4 * psc(outh) + yh4;
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v = image3d_ld4(bottom_blob_3d, ivec3(gx, 0, 0));
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else if (psc(dims) == 2)
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v = image3d_ld4(bottom_blob_3d, ivec3(gx, gy, 0));
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else // if (psc(dims) == 3 || psc(dims) == 4)
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v = image3d_ld4(bottom_blob_3d, ivec3(gx, gy, gz));
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image3d_st1(top_blob_3d, ivec3(x4.r, y4.r, z4.r), v.r);
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image3d_st1(top_blob_3d, ivec3(x4.g, y4.g, z4.g), v.g);
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image3d_st1(top_blob_3d, ivec3(x4.b, y4.b, z4.b), v.b);
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image3d_st1(top_blob_3d, ivec3(x4.a, y4.a, z4.a), v.a);
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ivec4 y4 = i4 / psc(outw);
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ivec4 x4 = i4 % psc(outw);
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v_offset = y4 * psc(outw) + x4;
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int size = psc(outw) * psc(outh);
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ivec4 z4 = i4 / size;
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ivec4 y4 = i4 % size / psc(outw);
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ivec4 x4 = i4 % size % psc(outw);
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v_offset = z4 * psc(outcstep) + y4 * psc(outw) + x4;
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int size = psc(outw) * psc(outh) * psc(outd);
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int dsize = psc(outw) * psc(outh);
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ivec4 z4 = i4 / size;
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ivec4 yd4 = i4 % size / dsize;
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ivec4 yh4 = i4 % size % dsize / psc(outw);
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ivec4 x4 = i4 % size % dsize % psc(outw);
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ivec4 y4 = yd4 * psc(outh) + yh4;
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v_offset = z4 * psc(outcstep) + y4 * psc(outw) + x4;
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int gi = gz * psc(cstep) + gy * psc(w) + gx;
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buffer_cp4to1(top_blob_data, v_offset, bottom_blob_data, gi);