renderer: better sdr eotf settings (#12812)

1 files changed, 35 insertions, 0 deletions

diff --git a/src/helpers/TransferFunction.cpp b/src/helpers/TransferFunction.cpp
new file mode 100644
index 00000000..935f77fe
--- /dev/null
+++ b/src/helpers/TransferFunction.cpp
@@ -0,0 +1,35 @@
+#include "TransferFunction.hpp"
+#include "../config/ConfigValue.hpp"
+#include "../event/EventBus.hpp"
+#include <string>
+#include <unordered_map>
+#include <hyprlang.hpp>
+
+using namespace NTransferFunction;
+
+static std::unordered_map<std::string, eTF> const table = {{"default", TF_DEFAULT}, {"0", TF_DEFAULT},       {"auto", TF_AUTO}, {"srgb", TF_SRGB},
+                                                           {"3", TF_SRGB},          {"gamma22", TF_GAMMA22}, {"1", TF_GAMMA22}, {"gamma22force", TF_FORCED_GAMMA22},
+                                                           {"2", TF_FORCED_GAMMA22}};
+
+eTF                                               NTransferFunction::fromString(const std::string tfName) {
+    auto it = table.find(tfName);
+    if (it == table.end())
+        return TF_DEFAULT;
+    return it->second;
+}
+
+std::string NTransferFunction::toString(eTF tf) {
+    for (const auto& [key, value] : table) {
+        if (value == tf)
+            return key;
+    }
+    return "";
+}
+
+eTF NTransferFunction::fromConfig() {
+    static auto PSDREOTF = CConfigValue<Hyprlang::STRING>("render:cm_sdr_eotf");
+    static auto sdrEOTF  = NTransferFunction::fromString(*PSDREOTF);
+    static auto P        = Event::bus()->m_events.config.reloaded.listen([]() { sdrEOTF = NTransferFunction::fromString(*PSDREOTF); });
+
+    return sdrEOTF;
+}