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// This file is part of the 64k demo project.
// It implements the sequence compiler tool.
// Converts a text-based timeline description into C++ code.
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
struct EffectEntry {
std::string class_name;
std::string start;
std::string end;
std::string priority;
std::string extra_args;
};
struct SequenceEntry {
std::string start_time;
std::string priority;
std::vector<EffectEntry> effects;
};
std::string trim(const std::string &str) {
size_t first = str.find_first_not_of(" ");
if (std::string::npos == first)
return str;
size_t last = str.find_last_not_of(" ");
return str.substr(first, (last - first + 1));
}
int main(int argc, char *argv[]) {
if (argc != 3) {
std::cerr << "Usage: " << argv[0] << " <input.seq> <output.cc>\n";
std::cerr << "Example: " << argv[0]
<< " assets/demo.seq src/generated/timeline.cc\n";
return 1;
}
std::ifstream in_file(argv[1]);
if (!in_file.is_open()) {
std::cerr << "Error: Could not open input file " << argv[1] << "\n";
return 1;
}
std::vector<SequenceEntry> sequences;
SequenceEntry *current_seq = nullptr;
std::string line;
int line_num = 0;
while (std::getline(in_file, line)) {
line_num++;
std::string trimmed = trim(line);
if (trimmed.empty() || trimmed[0] == '#')
continue;
std::stringstream ss(trimmed);
std::string command;
ss >> command;
if (command == "SEQUENCE") {
std::string start, priority;
if (!(ss >> start >> priority)) {
std::cerr << "Error line " << line_num
<< ": SEQUENCE requires <start> <priority>\n";
return 1;
}
sequences.push_back({start, priority, {}});
current_seq = &sequences.back();
} else if (command == "EFFECT") {
if (!current_seq) {
std::cerr << "Error line " << line_num
<< ": EFFECT found outside of SEQUENCE\n";
return 1;
}
std::string class_name, start, end, priority;
if (!(ss >> class_name >> start >> end >> priority)) {
std::cerr << "Error line " << line_num
<< ": EFFECT requires <Class> <start> <end> <priority>\n";
return 1;
}
// Capture remaining args
std::string extra_args;
std::getline(ss, extra_args); // Read rest of line
// Remove leading whitespace from getline if any (getline reads the space
// after priority)
extra_args = trim(extra_args);
if (!extra_args.empty()) {
extra_args = ", " + extra_args;
}
current_seq->effects.push_back(
{class_name, start, end, priority, extra_args});
} else {
std::cerr << "Error line " << line_num << ": Unknown command '" << command
<< "'\n";
return 1;
}
}
std::ofstream out_file(argv[2]);
if (!out_file.is_open()) {
std::cerr << "Error: Could not open output file " << argv[2] << "\n";
return 1;
}
out_file << "// Auto-generated by seq_compiler. Do not edit.\n";
out_file << "#include \"gpu/demo_effects.h\"\n";
out_file << "#include \"gpu/effect.h\"\n\n";
out_file << "void LoadTimeline(MainSequence& main_seq, WGPUDevice device, "
"WGPUQueue queue, WGPUTextureFormat format) {\n";
for (const auto &seq : sequences) {
out_file << " {\n";
out_file << " auto seq = std::make_shared<Sequence>();\n";
for (const auto &eff : seq.effects) {
out_file << " seq->add_effect(std::make_shared<" << eff.class_name
<< ">(device, queue, format" << eff.extra_args << "), "
<< eff.start << "f, " << eff.end << "f, " << eff.priority
<< ");\n";
}
out_file << " main_seq.add_sequence(seq, " << seq.start_time << "f, "
<< seq.priority << ");\n";
out_file << " }\n";
}
out_file << "}\n";
std::cout << "Successfully generated timeline with " << sequences.size()
<< " sequences.\n";
return 0;
}
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