1 /*
2 * Copyright (C) 2023 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <cstring>
18 #include <fstream>
19 #include <iomanip>
20 #include <iostream>
21 #include <sstream>
22 #include <string>
23 #include <vector>
24
25 namespace {
26
StrSplit(const std::string & s,const char delimiter)27 std::vector<std::string> StrSplit(const std::string& s, const char delimiter) {
28 std::vector<std::string> result;
29 std::istringstream stream(s);
30 std::string item;
31 while (std::getline(stream, item, delimiter)) {
32 result.push_back(item);
33 }
34 return result;
35 }
36
37 } // namespace
38
main(int argc,char ** argv)39 int main(int argc, char** argv) {
40 if (argc != 5) {
41 std::cout << "Expected 5 arguments.";
42 std::exit(1);
43 }
44
45 const std::string input_glsl_filename = argv[1];
46 const std::string input_spirv_filename = argv[2];
47 const std::string input_spirv_varname = argv[3];
48 const std::string output_embed_filename = argv[4];
49
50 std::ifstream input_glsl_file(input_glsl_filename);
51 if (!input_glsl_file.is_open()) {
52 std::cout << "Failed to open input glsl file " << input_spirv_filename;
53 std::exit(1);
54 }
55
56 const std::string input_glsl(
57 (std::istreambuf_iterator<char>(input_glsl_file)),
58 std::istreambuf_iterator<char>());
59 const std::vector<std::string> input_glsl_lines = StrSplit(input_glsl, '\n');
60
61 std::ifstream input_spirv_file(input_spirv_filename,
62 std::ios::ate | std::ios::binary);
63 if (!input_spirv_file.is_open()) {
64 std::cout << "Failed to open input spirv file " << input_spirv_filename;
65 std::exit(1);
66 }
67
68 const std::size_t input_spirv_bytes_size =
69 static_cast<std::size_t>(input_spirv_file.tellg());
70 std::vector<unsigned char> input_spirv_bytes(input_spirv_bytes_size);
71 input_spirv_file.seekg(0);
72 input_spirv_file.read(reinterpret_cast<char*>(input_spirv_bytes.data()),
73 input_spirv_bytes_size);
74 input_spirv_file.close();
75
76 std::ofstream output_embed_file(output_embed_filename);
77 if (!output_embed_file.is_open()) {
78 std::cout << "Failed to open output file " << output_embed_filename;
79 std::exit(1);
80 }
81
82 output_embed_file << "// Generated from GLSL:\n//\n";
83 for (const std::string& input_glsl_line : input_glsl_lines) {
84 output_embed_file << "// " << input_glsl_line << "\n";
85 }
86
87 output_embed_file << "const std::vector<uint8_t> " << input_spirv_varname
88 << " = {";
89
90 const unsigned char* spirv_data = input_spirv_bytes.data();
91 for (std::size_t i = 0; i < input_spirv_bytes_size; i++) {
92 constexpr const std::size_t kNumBytesPerLine = 16;
93
94 if (i % kNumBytesPerLine == 0) {
95 output_embed_file << "\n\t";
96 }
97
98 output_embed_file << "0x" << std::hex << std::setfill('0') << std::setw(2)
99 << static_cast<int>(*spirv_data) << ", ";
100 ++spirv_data;
101 }
102 output_embed_file << "\n};\n\n";
103
104 output_embed_file.close();
105 return 0;
106 }