Apply Rect to Buffer.borderedRectangle

Also set it to have all fields with a default of 0 since we use that
quite a bit and it saves writing it.

src/Buffer.zig

@@ -95,19 +95,16 @@ fn bufferListener(_: *wl.Buffer, event: wl.Buffer.Event, buffer: *Buffer) void {
 
 pub fn borderedRectangle(
     buffer: Buffer,
-    x: u31,
-    y: u31,
-    width: u31,
-    height: u31,
+    rect: utils.Rect,
     border_width: u31,
     scale: u31,
     background_color: *const pixman.Color,
     border_color: *const pixman.Color,
 ) void {
-    const render_x: i16 = @intCast(x * scale);
-    const render_y: i16 = @intCast(y * scale);
-    const render_width: u16 = @intCast(width * scale);
-    const render_height: u16 = @intCast(height * scale);
+    const render_x: i16 = @intCast(rect.x * @as(i32, scale));
+    const render_y: i16 = @intCast(rect.y * @as(i32, scale));
+    const render_width: u16 = @intCast(rect.width * scale);
+    const render_height: u16 = @intCast(rect.height * scale);
     const render_border_width: u16 = @intCast(border_width * scale);
 
     // Background fill

src/Output.zig

@@ -17,20 +17,10 @@ name: ?[]const u8 = null,
 
 // Output geometry
 scale: u31 = 1,
-geometry: Rect = .{
-    .x = 0,
-    .y = 0,
-    .width = 0,
-    .height = 0,
-},
+geometry: Rect = .{},
 
 // Area left after layer shell surfaces take exclusive area
-usable_geometry: Rect = .{
-    .x = 0,
-    .y = 0,
-    .width = 0,
-    .height = 0,
-},
+usable_geometry: Rect = .{},
 
 // Information for this Output's wallpaper
 wallpaper_render_scale: u31 = 0,

src/TagOverlay.zig

@@ -198,7 +198,7 @@ pub fn render(tag_overlay: *TagOverlay) !void {
     }
     const buffer = try context.buffer_pool.nextBuffer(context.wl_shm, render_width, render_height);
 
-    buffer.borderedRectangle(0, 0, tag_overlay.width, tag_overlay.height, options.border_width, scale, &options.background_color, &options.border_color);
+    buffer.borderedRectangle(.{ .width = tag_overlay.width, .height = tag_overlay.height }, options.border_width, scale, &options.background_color, &options.border_color);
 
     const focused_tags = tag_overlay.output.tags;
     const occupied_tags = tag_overlay.output.occupiedTags();
@@ -218,14 +218,16 @@ pub fn render(tag_overlay: *TagOverlay) !void {
             const x = options.border_width + @as(u31, @intCast((tag + 1) * options.square_padding)) + @as(u31, @intCast(tag * options.square_size));
             const y = options.border_width + @as(u31, @intCast((row + 1) * options.square_padding)) + @as(u31, @intCast(row * options.square_size));
 
-            buffer.borderedRectangle(x, y, options.square_size, options.square_size, options.square_border_width, scale, bg_color, border_color);
+            buffer.borderedRectangle(.{ .x = x, .y = y, .width = options.square_size, .height = options.square_size }, options.square_border_width, scale, bg_color, border_color);
 
             if (occupied_tags & (@as(u32, 1) << @intCast(current_tag)) != 0) {
                 buffer.borderedRectangle(
-                    x + options.square_inner_padding,
-                    y + options.square_inner_padding,
-                    options.square_size - 2 * options.square_inner_padding,
-                    options.square_size - 2 * options.square_inner_padding,
+                    .{
+                        .x = x + options.square_inner_padding,
+                        .y = y + options.square_inner_padding,
+                        .width = options.square_size - 2 * options.square_inner_padding,
+                        .height = options.square_size - 2 * options.square_inner_padding,
+                    },
                     options.square_border_width,
                     scale,
                     occupied_color,

src/Window.zig

@@ -9,12 +9,7 @@ context: *Context,
 river_window_v1: *river.WindowV1,
 river_node_v1: *river.NodeV1,
 
-rect: utils.Rect = .{
-    .width = 0,
-    .height = 0,
-    .x = 0,
-    .y = 0,
-},
+rect: utils.Rect = .{},
 
 fullscreen: bool = false,
 maximized: bool = false,
@@ -23,12 +18,7 @@ tags: u32 = 0x0001,
 output: ?*Output,
 
 floating: bool = false,
-floating_rect: utils.Rect = .{
-    .width = 0,
-    .height = 0,
-    .x = 0,
-    .y = 0,
-},
+floating_rect: utils.Rect = .{},
 
 initialized: bool = false,
 

src/utils.zig

@@ -13,10 +13,10 @@ pub const RiverColor = struct {
 };
 
 pub const Rect = struct {
-    width: u31,
-    height: u31,
-    x: i32,
-    y: i32,
+    width: u31 = 0,
+    height: u31 = 0,
+    x: i32 = 0,
+    y: i32 = 0,
 };
 
 /// Parse a color in the format 0xRRGGBB or 0xRRGGBBAA and convert it to