mirror of
https://github.com/openharmony/third_party_meshoptimizer.git
synced 2026-07-20 12:26:24 -04:00
Arseny Kapoulkine
97408c606f
When the vertex count is specified, instead of compressing the input we decompress it; it's also possible to pipe the output through codectest again to re-compress it. This makes it easier to experiment with already-compressed data, including intermediate measurements with other compresors and prefiltering.
61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
#include "../src/meshoptimizer.h"
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#include <vector>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef _WIN32
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#include <fcntl.h>
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#include <io.h>
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#endif
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int main(int argc, char** argv)
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{
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#ifdef _WIN32
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_setmode(_fileno(stdin), _O_BINARY);
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_setmode(_fileno(stdout), _O_BINARY);
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#endif
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if (argc < 2 || argc > 3 || atoi(argv[1]) <= 0)
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{
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fprintf(stderr, "Usage: %s <stride> [<count>]\n", argv[0]);
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return 1;
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}
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size_t stride = atoi(argv[1]);
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std::vector<unsigned char> input;
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unsigned char buffer[4096];
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size_t bytes_read;
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while ((bytes_read = fread(buffer, 1, sizeof(buffer), stdin)) > 0)
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input.insert(input.end(), buffer, buffer + bytes_read);
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if (argc == 3)
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{
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// if count is specified, we assume input is meshopt-encoded and decode it first
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size_t count = atoi(argv[2]);
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std::vector<unsigned char> decoded(count * stride);
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int res = meshopt_decodeVertexBuffer(&decoded[0], count, stride, &input[0], input.size());
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if (res != 0)
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{
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fprintf(stderr, "Error decoding input: %d\n", res);
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return 2;
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}
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fwrite(decoded.data(), 1, decoded.size(), stdout);
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return 0;
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}
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else
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{
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size_t vertex_count = input.size() / stride;
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std::vector<unsigned char> output(meshopt_encodeVertexBufferBound(vertex_count, stride));
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size_t output_size = meshopt_encodeVertexBuffer(output.data(), output.size(), input.data(), vertex_count, stride);
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fwrite(output.data(), 1, output_size, stdout);
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return 0;
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}
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}
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