feat: add splash support

src/Hyprpaper.cpp

@@ -473,6 +473,32 @@ void CHyprpaper::renderWallpaperForMonitor(SMonitor* pMonitor) {
     cairo_set_source_surface(PCAIRO, PWALLPAPERTARGET->m_pCairoSurface, origin.x, origin.y);
 
     cairo_paint(PCAIRO);
+
+    if (g_pHyprpaper->m_bRenderSplash && getenv("HYPRLAND_INSTANCE_SIGNATURE")) {
+        auto SPLASH = execAndGet("hyprctl splash");
+        SPLASH.pop_back();
+
+        Debug::log(LOG, "Rendering splash: %s", SPLASH.c_str());
+
+        cairo_select_font_face(PCAIRO, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
+
+        const auto FONTSIZE = (int)(DIMENSIONS.y / 76.0 / scale);
+        cairo_set_font_size(PCAIRO, FONTSIZE);
+
+        cairo_set_source_rgba(PCAIRO, 1.0, 1.0, 1.0, 0.32);
+
+        cairo_text_extents_t textExtents;
+        cairo_text_extents(PCAIRO, SPLASH.c_str(), &textExtents);
+
+        cairo_move_to(PCAIRO, ((DIMENSIONS.x - textExtents.width * scale) / 2.0) / scale, (DIMENSIONS.y * 0.99 - textExtents.height * scale) / scale);
+
+        Debug::log(LOG, "Splash font size: %d, pos: %.2f, %.2f", FONTSIZE, (DIMENSIONS.x - textExtents.width) / 2.0 / scale, DIMENSIONS.y * 0.95 - textExtents.height / scale);
+
+        cairo_show_text(PCAIRO, SPLASH.c_str());
+
+        cairo_surface_flush(PWALLPAPERTARGET->m_pCairoSurface);
+    }
+
     cairo_restore(PCAIRO);
 
     if (pMonitor->pCurrentLayerSurface) {

src/Hyprpaper.hpp

@@ -37,6 +37,7 @@ public:
     std::vector<std::unique_ptr<SMonitor>> m_vMonitors;
 
     bool        m_bIPCEnabled = true;
+    bool        m_bRenderSplash = false;
     std::string m_szExplicitConfigPath;
     bool        m_bNoFractionalScale = false;
 

src/config/ConfigManager.cpp

@@ -107,6 +107,8 @@ void CConfigManager::parseKeyword(const std::string& COMMAND, const std::string&
         handleUnload(COMMAND, VALUE);
     else if (COMMAND == "ipc")
         g_pHyprpaper->m_bIPCEnabled = VALUE == "1" || VALUE == "yes" || VALUE == "on" || VALUE == "true";
+    else if (COMMAND == "splash")
+        g_pHyprpaper->m_bRenderSplash = VALUE == "1" || VALUE == "yes" || VALUE == "on" || VALUE == "true";
     else
         parseError = "unknown keyword " + COMMAND;
 }

src/helpers/MiscFunctions.cpp

@@ -1,4 +1,7 @@
 #include "MiscFunctions.hpp"
+#include <array>
+#include "../debug/Log.hpp"
+#include <memory>
 
 bool vectorDeltaLessThan(const Vector2D& a, const Vector2D& b, const float& delta) {
     return std::abs(a.x - b.x) < delta && std::abs(a.y - b.y) < delta;
@@ -7,3 +10,17 @@ bool vectorDeltaLessThan(const Vector2D& a, const Vector2D& b, const float& delt
 bool vectorDeltaLessThan(const Vector2D& a, const Vector2D& b, const Vector2D& delta) {
     return std::abs(a.x - b.x) < delta.x && std::abs(a.y - b.y) < delta.y;
 }
+
+std::string execAndGet(const char* cmd) {
+    std::array<char, 128>                          buffer;
+    std::string                                    result;
+    const std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
+    if (!pipe) {
+        Debug::log(ERR, "execAndGet: failed in pipe");
+        return "";
+    }
+    while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
+        result += buffer.data();
+    }
+    return result;
+}

src/helpers/MiscFunctions.hpp

@@ -1,5 +1,7 @@
 #pragma once
+#include <string>
 #include "Vector2D.hpp"
 
 bool vectorDeltaLessThan(const Vector2D& a, const Vector2D& b, const float& delta);
 bool vectorDeltaLessThan(const Vector2D& a, const Vector2D& b, const Vector2D& delta);
+std::string execAndGet(const char*);