moving

src/main.zig

@@ -3,7 +3,6 @@ const mem = std.mem;
 const posix = std.posix;
 
 const wayland = @import("wayland");
-
 const wl = wayland.client.wl;
 const zwlr = wayland.client.zwlr;
 const layer_shell = zwlr.common.zwlr.layer_shell_v1;
@@ -20,6 +19,7 @@ const Context = struct {
     compositor: *wl.Compositor = undefined,
     blk: []u32 = undefined,
 
+    // width and height of our context
     width: i32 = 0,
     height: i32 = 0,
 };
@@ -46,34 +46,51 @@ pub fn main() !void {
     context.layer_surface = try context.shell.getLayerSurface(context.surface, null, .top, "zayneko");
     defer context.layer_surface.destroy();
 
-    context.layer_surface.setExclusiveZone(20);
+    context.layer_surface.setExclusiveZone(0);
     context.layer_surface.setAnchor(.{
-        .top = true,
+        .top = false,
-        .bottom = false,
+        .bottom = true,
         .left = true,
         .right = true,
     });
 
-    context.layer_surface.setSize(0, 20);
+    context.layer_surface.setSize(0, 30);
     context.layer_surface.setListener(*Context, layerSurfaceListener, &context);
 
     context.surface.commit();
     if (display.roundtrip() != .SUCCESS) return error.RoundtripFailed;
 
     std.debug.print("{}\n", .{context.blk.len});
-    for (context.blk) |*a|
+    std.debug.print("Width: {}\n", .{context.width});
-        // a.* = if (i < 2000) 0 else 0xFFFFFFFF;
+    std.debug.print("Height: {}\n", .{context.height});
-        a.* = 0xFFFFFFFF;
 
     context.surface.attach(context.buffer, 0, 0);
-    context.surface.damageBuffer(0, 0, context.width, context.height);
-
     context.surface.commit();
+    if (display.roundtrip() != .SUCCESS) return error.RoundtripFailed;
 
+    while (true) {
+        const segment: usize =
+            @intCast(@divFloor(context.width, 10));
+        for (0..segment) |i| {
+            std.debug.print("{}\n", .{i});
+            const casted: i32 = @intCast(i);
+
+            move_buffer(casted, &context);
             _ = display.flush();
             if (display.dispatchPending() != .SUCCESS) return error.DispatchFailed;
+            std.time.sleep(500000);
+        }
+        for (0..segment) |i| {
+            // const casted: i32 = @intCast(i);
+            std.debug.print("smaller {}\n", .{(segment - i)});
+            move_buffer(@intCast(segment - i), &context);
+            _ = display.flush();
+            if (display.dispatchPending() != .SUCCESS) return error.DispatchFailed;
+            std.time.sleep(500000);
+        }
+    }
 
-    std.time.sleep(4000000000);
+    // std.time.sleep(4000000000);
 }
 
 fn registryListener(
@@ -94,6 +111,20 @@ fn registryListener(
         .global_remove => {},
     }
 }
+
+fn move_buffer(offset: i32, context: *Context) void {
+    @memset(context.blk, 0);
+
+    for (context.blk, 0..context.blk.len) |*a, i| {
+        const context_width: usize = @intCast(context.width);
+        if (i % context_width > offset * 10 and i % context_width < offset * 10 + @divFloor(context.width, 10))
+            a.* = 0xFFFFFFFF;
+    }
+    context.surface.attach(context.buffer, 0, 0);
+    context.surface.damageBuffer(offset * 10 - 10, 0, @divFloor(context.width, 10) * 2, context.height);
+    context.surface.commit();
+}
+
 fn layerSurfaceListener(
     surface: *zwlr.LayerSurfaceV1,
     event: zwlr.LayerSurfaceV1.Event,