Add quirks:prefer_hdr to fix HDR activation for some clients

src/Compositor.cpp

@@ -3110,6 +3110,27 @@ SImageDescription CCompositor::getPreferredImageDescription() {
     return m_monitors.size() == 1 ? m_monitors[0]->m_imageDescription : SImageDescription{.primaries = NColorPrimaries::BT709};
 }
 
+SImageDescription CCompositor::getHDRImageDescription() {
+    if (!PROTO::colorManagement) {
+        Debug::log(ERR, "FIXME: color management protocol is not enabled, returning empty image description");
+        return SImageDescription{};
+    }
+
+    return m_monitors.size() == 1 && m_monitors[0]->m_output && m_monitors[0]->m_output->parsedEDID.hdrMetadata.has_value() ?
+        SImageDescription{.transferFunction = NColorManagement::CM_TRANSFER_FUNCTION_ST2084_PQ,
+                          .primariesNameSet = true,
+                          .primariesNamed   = NColorManagement::CM_PRIMARIES_BT2020,
+                          .primaries        = NColorManagement::getPrimaries(NColorManagement::CM_PRIMARIES_BT2020),
+                          .luminances       = {.min       = m_monitors[0]->m_output->parsedEDID.hdrMetadata->desiredContentMinLuminance,
+                                               .max       = m_monitors[0]->m_output->parsedEDID.hdrMetadata->desiredContentMaxLuminance,
+                                               .reference = m_monitors[0]->m_output->parsedEDID.hdrMetadata->desiredMaxFrameAverageLuminance}} :
+        SImageDescription{.transferFunction = NColorManagement::CM_TRANSFER_FUNCTION_ST2084_PQ,
+                          .primariesNameSet = true,
+                          .primariesNamed   = NColorManagement::CM_PRIMARIES_BT2020,
+                          .primaries        = NColorManagement::getPrimaries(NColorManagement::CM_PRIMARIES_BT2020),
+                          .luminances       = {.min = 0, .max = 10000, .reference = 203}};
+}
+
 bool CCompositor::shouldChangePreferredImageDescription() {
     Debug::log(WARN, "FIXME: color management protocol is enabled and outputs changed, check preferred image description changes");
     return false;

src/Compositor.hpp

@@ -169,6 +169,7 @@ class CCompositor {
     std::optional<unsigned int>         getVTNr();
 
     NColorManagement::SImageDescription getPreferredImageDescription();
+    NColorManagement::SImageDescription getHDRImageDescription();
     bool                                shouldChangePreferredImageDescription();
 
     bool                                supportsDrmSyncobjTimeline() const;

src/config/ConfigDescriptions.hpp

@@ -1999,4 +1999,16 @@ inline static const std::vector<SConfigOptionDescription> CONFIG_OPTIONS = {
         .type        = CONFIG_OPTION_BOOL,
         .data        = SConfigOptionDescription::SBoolData{false},
     },
+
+    /*
+     * Quirks
+    */
+
+    SConfigOptionDescription{
+        .value       = "quirks:prefer_hdr",
+        .description = "Prefer HDR mode. 0 - off, 1 - always, 2 - gamescope only",
+        .type        = CONFIG_OPTION_INT,
+        .data        = SConfigOptionDescription::SRangeData{.value = 0, .min = 0, .max = 2},
+    },
+
 };

src/config/ConfigManager.cpp

@@ -770,6 +770,8 @@ CConfigManager::CConfigManager() {
 
     registerConfigVar("experimental:xx_color_management_v4", Hyprlang::INT{0});
 
+    registerConfigVar("quirks:prefer_hdr", Hyprlang::INT{0});
+
     // devices
     m_config->addSpecialCategory("device", {"name"});
     m_config->addSpecialConfigValue("device", "sensitivity", {0.F});

src/protocols/core/Compositor.cpp

@@ -564,6 +564,10 @@ void CWLSurfaceResource::commitState(SSurfaceState& state) {
 }
 
 SImageDescription CWLSurfaceResource::getPreferredImageDescription() {
+    static const auto PFORCE_HDR = CConfigValue<Hyprlang::INT>("quirks:prefer_hdr");
+    if (*PFORCE_HDR == 1 || (*PFORCE_HDR == 2 && m_hlSurface && m_hlSurface->getWindow() && m_hlSurface->getWindow()->m_class == "gamescope"))
+        return g_pCompositor->getHDRImageDescription();
+
     auto parent = m_self;
     if (parent->m_role->role() == SURFACE_ROLE_SUBSURFACE) {
         auto subsurface = sc<CSubsurfaceRole*>(parent->m_role.get())->m_subsurface.lock();