abg

commit 8c5395cae232765a859f153b29ff4f32fa04a45d
parent 36d7ad8dc5f922fa3d011475ff048a5bffbcef99
Author: Andrew Laack <andrew@laack.co>
Date:   Tue, 15 Sep 2026 20:20:25 -0500

Removed feh dependence by making the raylib window special in the wm eyes and pushing it to the background

Diffstat:
M
background/README
 | 
2
+-
M
background/headers/background.hpp
 | 
1
+
M
background/src/background.cpp
 | 
42
++++++++++++++++++++++++++++++++++++++++++
M
background/src/main.cpp
 | 
35
++++++-----------------------------

4 files changed, 50 insertions(+), 30 deletions(-)
diff --git a/background/README b/background/README
@@ -4,4 +4,4 @@ background
 
 dependencies
 ============
-X11, feh (on $PATH), raylib, g++
+X11, raylib, g++
diff --git a/background/headers/background.hpp b/background/headers/background.hpp
@@ -5,3 +5,4 @@
 #include <vector>
 void setBackground(std::string filePath);
 std::vector<uint32_t> getScreenSize();
+void sendToBg(std::string name);
diff --git a/background/src/background.cpp b/background/src/background.cpp
@@ -4,6 +4,8 @@
 #include <string>
 #include <vector>
 #include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <unistd.h>
 
 void setBackground(std::string filePath) {
     std::string command = "/usr/bin/feh --no-fehbg --bg-scale " + filePath;
@@ -22,3 +24,43 @@ std::vector<uint32_t> getScreenSize() {
     std::vector<uint32_t> res {(uint32_t)screen->width, (uint32_t)screen->height};
     return res;
 }
+
+void sendToBg(std::string name)
+{
+    Display* d = XOpenDisplay(nullptr);
+    Window root = DefaultRootWindow(d), r, p, *kids;
+    uint32_t n;
+
+    XQueryTree(d, root, &r, &p, &kids, &n);
+    for (unsigned i = 0; i < n; i++) {
+
+        char* wn = nullptr;
+        XFetchName(d, kids[i], &wn);
+
+        if (wn == nullptr) {
+            continue;
+        }
+
+        bool hit = name == wn;
+        XFree(wn);
+
+        if (!hit) {
+            continue;
+        }
+
+        XSetWindowAttributes a;
+
+        a.override_redirect = True;
+        XChangeWindowAttributes(d, kids[i], CWOverrideRedirect, &a);
+
+        // have to do unmap / map to make it bg for all tags
+        XUnmapWindow(d, kids[i]);
+        XMapWindow(d, kids[i]);
+
+        XLowerWindow(d, kids[i]);
+        break;
+    }
+
+    XFree(kids);
+    XCloseDisplay(d);
+}
diff --git a/background/src/main.cpp b/background/src/main.cpp
@@ -2,33 +2,15 @@
 #include "../headers/prim.hpp"
 #include "../headers/background.hpp"
 #include <cstdlib>
-#include <iostream>
 #include <unistd.h>
 #include <raylib.h>
 #include <ctime>
 #include <queue>
 #include <unordered_set>
-#include <filesystem>
-
-
-void customTakeScreenshot(char* filePath){
-    const char *customParam;
-    Image screenshot = LoadImageFromScreen(); 
-    ExportImage(screenshot, TextFormat(filePath, customParam));
-    UnloadImage(screenshot); 
-}
 
 int main() {
 
-    int result = std::system("feh --version > /dev/null");
-
-    if (result != 0 ) {
-        std::cout << "Feh not found on $PATH, exiting." << std::endl;
-        return -1;
-    }
-
     SetTraceLogLevel(LOG_ERROR);
-    std::filesystem::create_directory("/dev/shm/bg");
     srand(clock());
 
     std::size_t edgeCount = 2000;
@@ -39,8 +21,11 @@ int main() {
     uint32_t xMax = ss[0];
     uint32_t yMax = ss[1];
 
-    SetConfigFlags(FLAG_WINDOW_HIDDEN);
-    InitWindow(xMax, yMax, "Raylib animation window");
+    // would be nice to do this all in background.cpp, but raylib and x11 can't both be imported 
+    // by the same file because of some dependency chain thing with Font.
+
+    InitWindow(xMax, yMax, "background-ray");
+    sendToBg("background-ray");
 
     while (!WindowShouldClose()) {
 
@@ -57,19 +42,11 @@ int main() {
         visitedIndices.insert(0);
 
         while (!WindowShouldClose() && toVisit.size() != 0) {
-            sleep(10);
             BeginDrawing();
             ClearBackground(BLACK);
             g.render();
             EndDrawing(); 
-            
-            // Basically all of the cost happens within these bounds
-            char path[] = "/dev/shm/bg/out.bmp";
-            customTakeScreenshot(path);
-            // TODO: Can this be done away with? It's not *that* slow...
-            setBackground(path);
-            // Above here.
-
+            sleep(5);
             oneStepPrim(toVisit, visitedIndices, g);
 
         }