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59 lines
1.3 KiB
Text
59 lines
1.3 KiB
Text
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#version 450 core
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#extension GL_EXT_scalar_block_layout : require
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#extension GL_EXT_shader_8bit_storage : require
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layout (local_size_x = 16, local_size_y = 1, local_size_z = 1) in;
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layout (std430, set = 0, binding = 0) uniform index_buffer_pattern
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{
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int ibp_pattern[8];
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int ibp_primitive_vertices;
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int ibp_primitive_vertices_out;
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int ibp_index_size;
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int ibp_index_size_out;
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int ibp_base_index;
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int ibp_index_stride;
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int src_offset;
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int total_primitives;
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};
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layout (std430, set = 1, binding = 1) buffer in_s
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{
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uint8_t[] in_data;
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};
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layout (std430, set = 1, binding = 2) buffer out_s
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{
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uint8_t[] out_data;
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};
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void main()
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{
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int primitiveIndex = int(gl_GlobalInvocationID.x);
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if (primitiveIndex >= total_primitives)
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{
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return;
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}
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int inOffset = primitiveIndex * ibp_index_stride;
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int outOffset = primitiveIndex * ibp_primitive_vertices_out;
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for (int i = 0; i < ibp_primitive_vertices_out; i++)
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{
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int j;
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int io = max(0, inOffset + ibp_base_index + ibp_pattern[i]) * ibp_index_size;
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int oo = (outOffset + i) * ibp_index_size_out;
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for (j = 0; j < ibp_index_size; j++)
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{
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out_data[oo + j] = in_data[src_offset + io + j];
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}
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for (; j < ibp_index_size_out; j++)
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{
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out_data[oo + j] = uint8_t(0);
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}
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}
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}
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