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e15c689061
> caused by bad code around thumbnail fetching logic including file checks in every draw call, see #4 > added `hooks::wmisc` for linux specific minor performance fixes and similar
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
#include "wmischook.h"
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#include "util/logging.h"
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#include "util/detour.h"
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#include "util/sigscan.h"
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namespace hooks::wmisc::thumbnail
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{
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typedef bool (*ThumExists_t)(void *titleUTF_getter, int32_t id, char flag);
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static ThumExists_t ThumExists;
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bool on_thum_exists_(void *titleUTF_getter, int32_t id, char flag)
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{
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static std::unordered_map<int32_t, bool> thumids;
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auto it = thumids.find(id);
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if (it != thumids.end())
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{
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return it->second;
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}
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else
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{
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log_misc("hooks::wmisc::thumbnail", "Caching state for [{}]", id);
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it = thumids.insert({id, ThumExists(titleUTF_getter, id, flag)}).first;
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}
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return it->second;
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}
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void run(HINSTANCE hmodule)
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{
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// Reverse lookup function head (PUSH RDI) for ThumExists() specific signature, quietly fail if invalid
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intptr_t beg, match, TX_ThumExists;
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TX_ThumExists = beg = match = find_pattern_from(hmodule, "83f801750c4084ff750732c0", "XXXXXXXXXXXX", 0, 0, 0);
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while (beg > sizeof(intptr_t) && match >= TX_ThumExists)
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{
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beg--;
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match = find_pattern_from(hmodule, "4057", "XX", 0, 0, beg - reinterpret_cast<intptr_t>(hmodule));
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}
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TX_ThumExists = match;
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log_info("hooks::wmisc::thumbnail", "Hooking ThumExists({})", reinterpret_cast<void *>(TX_ThumExists));
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detour::trampoline_try(reinterpret_cast<void *>(TX_ThumExists), reinterpret_cast<void *>(on_thum_exists_), reinterpret_cast<void **>(&ThumExists));
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}
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}
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namespace hooks::wmisc
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{
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static constexpr unsigned int by_model(const char *model, int h = 0)
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{
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return !model[h] ? 5381 : (by_model(model, h + 1) * 33) ^ model[h];
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}
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static constexpr unsigned int by_ext(const char *ext, int h = 0)
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{
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return !ext[h] ? 5381 : (by_ext(ext, h + 1) * 33) ^ ext[h];
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}
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void apply_performance_hacks(HINSTANCE hmodule, const char *model, const char *ext)
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{
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log_info("hooks::wmisc", "Enabling performance patches for {}-{}", model, ext);
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switch (by_model(model))
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{
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case by_model("LDJ"):
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thumbnail::run(hmodule);
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break;
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default:
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break;
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}
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}
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}
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