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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#include <cstring>
#include <memory>
#include <set>
#include "effect_codegen.hpp"
#include "effect_parser.hpp"
#include "effect_preprocessor.hpp"
#include "common/fs/fs.h"
#include "common/fs/fs_util.h"
#include "video_core/post_processing/fx_compile.h"
#include "video_core/post_processing/fx_effect.h"
namespace VideoCore {
FxCompileResult CompileFxEffect(const std::filesystem::path& path, u32 width, u32 height,
u32 color_bit_depth) {
FxCompileResult result;
if (!Common::FS::Exists(path)) {
result.error = "Effect file not found: " + Common::FS::PathToUTF8String(path);
return result;
}
reshadefx::preprocessor preprocessor;
preprocessor.add_macro_definition("__RESHADE__", "60800");
preprocessor.add_macro_definition("__RESHADE_PERFORMANCE_MODE__", "1");
preprocessor.add_macro_definition("__RENDERER__", "0x20000");
preprocessor.add_macro_definition("__VENDOR__", "0");
preprocessor.add_macro_definition("__DEVICE__", "0");
preprocessor.add_macro_definition("__APPLICATION__", "0");
preprocessor.add_macro_definition("BUFFER_WIDTH", std::to_string(width));
preprocessor.add_macro_definition("BUFFER_HEIGHT", std::to_string(height));
preprocessor.add_macro_definition("BUFFER_RCP_WIDTH", "(1.0 / BUFFER_WIDTH)");
preprocessor.add_macro_definition("BUFFER_RCP_HEIGHT", "(1.0 / BUFFER_HEIGHT)");
preprocessor.add_macro_definition("BUFFER_COLOR_DEPTH", std::to_string(color_bit_depth));
preprocessor.add_macro_definition("BUFFER_COLOR_BIT_DEPTH", std::to_string(color_bit_depth));
for (const auto& include : GetFxIncludePaths(path)) {
preprocessor.add_include_path(include);
}
if (!preprocessor.append_file(path)) {
result.error = preprocessor.errors();
if (result.error.empty()) {
result.error = "Failed to preprocess " + Common::FS::PathToUTF8String(path);
}
return result;
}
std::unique_ptr<reshadefx::codegen> backend(
reshadefx::create_codegen_spirv(true, false, false, false, true));
reshadefx::parser parser;
if (!parser.parse(preprocessor.output(), backend.get())) {
result.error = parser.errors();
if (result.error.empty()) {
result.error = "Failed to parse " + Common::FS::PathToUTF8String(path);
}
return result;
}
result.module = backend->module();
std::set<std::string> wanted;
for (const auto& technique : result.module.techniques) {
for (const auto& pass : technique.passes) {
if (!pass.vs_entry_point.empty()) {
wanted.insert(pass.vs_entry_point);
}
if (!pass.ps_entry_point.empty()) {
wanted.insert(pass.ps_entry_point);
}
}
}
for (const auto& name : wanted) {
std::string binary;
std::string assembly;
std::string errors;
if (!backend->assemble_code_for_entry_point(name, binary, assembly, errors)) {
result.error = "Failed to assemble entry point '" + name + "': " + errors;
return result;
}
if (binary.size() % sizeof(u32) != 0) {
result.error = "Entry point '" + name + "' produced a malformed SPIR-V module";
return result;
}
std::vector<u32> words(binary.size() / sizeof(u32));
std::memcpy(words.data(), binary.data(), binary.size());
result.entry_points.emplace(name, std::move(words));
}
if (result.entry_points.empty()) {
result.error = "Effect declares no usable entry points";
}
return result;
}
} // namespace VideoCore
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