какие то продвижения

src/WindowData.zig

@@ -0,0 +1,11 @@
+const std = @import("std");
+
+const WindowData = @This();
+
+frame: u64,
+
+pub fn init() WindowData {
+    return WindowData{
+        .frame = 0,
+    };
+}

src/main.zig

@@ -2,12 +2,52 @@ const std = @import("std");
 const builtin = @import("builtin");
 const dvui = @import("dvui");
 const SDLBackend = @import("sdl-backend");
+const sdl_c = SDLBackend.c;
+const WindowData = @import("WindowData.zig");
+const dbprint = std.debug.print;
 
 const WindowContext = struct {
     backend: SDLBackend,
+    backend_id: u32,
     window: dvui.Window,
     title: [:0]u8,
     id: usize,
+    data: WindowData,
+
+    fn init(allocator: std.mem.Allocator, id: usize) !*WindowContext {
+        var ctx = try allocator.create(WindowContext);
+        errdefer allocator.destroy(ctx);
+
+        ctx.id = id;
+
+        const title_bytes = try std.fmt.allocPrint(allocator, "My DVUI App #{d}", .{id});
+        defer allocator.free(title_bytes);
+
+        ctx.title = try allocator.allocSentinel(u8, title_bytes.len, 0);
+        @memcpy(ctx.title[0..title_bytes.len], title_bytes);
+
+        ctx.backend = try SDLBackend.initWindow(.{
+            .allocator = allocator,
+            .size = .{ .w = 800.0, .h = 600.0 },
+            .title = ctx.title,
+            .vsync = true,
+        });
+        errdefer destroyBackendKeepingSDL(&ctx.backend);
+
+        ctx.backend_id = @intCast(sdl_c.SDL_GetWindowID(ctx.backend.window));
+
+        const theme = switch (ctx.backend.preferredColorScheme() orelse .light) {
+            .light => dvui.Theme.builtin.adwaita_light,
+            .dark => dvui.Theme.builtin.adwaita_dark,
+        };
+
+        ctx.window = try dvui.Window.init(@src(), allocator, ctx.backend.backend(), .{ .theme = theme });
+        errdefer ctx.window.deinit();
+
+        ctx.data = WindowData.init();
+
+        return ctx;
+    }
 
     fn deinit(self: *WindowContext, allocator: std.mem.Allocator, last_backend: bool) void {
         self.window.deinit();
@@ -21,6 +61,13 @@ const WindowContext = struct {
         allocator.free(self.title);
         self.* = undefined;
     }
+
+    fn destroyBackendKeepingSDL(backend: *SDLBackend) void {
+        sdl_c.SDL_DestroyRenderer(backend.renderer);
+        sdl_c.SDL_DestroyWindow(backend.window);
+        backend.we_own_window = false;
+        backend.deinit();
+    }
 };
 
 pub fn main() !void {
@@ -46,12 +93,10 @@ pub fn main() !void {
     }
 
     var next_window_id: usize = 1;
-    const first_ctx = try createWindow(allocator, next_window_id);
+    const first_ctx = try WindowContext.init(allocator, next_window_id);
     next_window_id += 1;
     try windows.append(allocator, first_ctx);
 
-    var interrupted = false;
-
     main_loop: while (true) {
         if (windows.items.len == 0) break :main_loop;
 
@@ -59,18 +104,22 @@ pub fn main() !void {
 
         var min_wait_event_micros: u32 = std.math.maxInt(u32);
         var idx: usize = 0;
-        while (idx < windows.items.len) {
+        while (saw_events and idx < windows.items.len) {
             const ctx = windows.items[idx];
 
-            // beginWait coordinates with waitTime below to run frames only when needed
-            const nstime = ctx.window.beginWait(interrupted);
-            // marks the beginning of a frame for dvui, can call dvui functions after this
+            const flags = sdl_c.SDL_GetWindowFlags(ctx.backend.window);
+            const occluded = (flags & (sdl_c.SDL_WINDOW_HIDDEN | sdl_c.SDL_WINDOW_MINIMIZED | sdl_c.SDL_WINDOW_OCCLUDED)) != 0;
+            if (occluded) {
+                idx += 1;
+                continue;
+            }
+
+            const nstime = @max(ctx.window.frame_time_ns, ctx.backend.nanoTime());
+
             try ctx.window.begin(nstime);
 
-            // if dvui widgets might not cover the whole window, then need to clear
-            // the previous frame's render
-            _ = SDLBackend.c.SDL_SetRenderDrawColor(ctx.backend.renderer, 0, 0, 0, 255);
-            _ = SDLBackend.c.SDL_RenderClear(ctx.backend.renderer);
+            _ = sdl_c.SDL_SetRenderDrawColor(ctx.backend.renderer, 0, 0, 0, 255);
+            _ = sdl_c.SDL_RenderClear(ctx.backend.renderer);
 
             const keep_open = try gui_frame(ctx, allocator, &windows, &next_window_id);
             if (!keep_open) {
@@ -78,9 +127,7 @@ pub fn main() !void {
                 continue;
             }
 
-            // marks end of dvui frame, don't call dvui functions after this
-            // - sends all dvui stuff to backend for rendering, must be called before renderPresent()
-            const end_micros = try ctx.window.end(.{});
+            const end = try ctx.window.end(.{});
 
             // cursor management
             try ctx.backend.setCursor(ctx.window.cursorRequested());
@@ -89,48 +136,21 @@ pub fn main() !void {
             // render frame to OS
             try ctx.backend.renderPresent();
 
-            // waitTime and beginWait combine to achieve variable framerates
-            const wait_event_micros = ctx.window.waitTime(end_micros);
-            min_wait_event_micros = @min(min_wait_event_micros, wait_event_micros);
+            const sleep_time = ctx.window.waitTime(end);
+            min_wait_event_micros = @min(min_wait_event_micros, sleep_time);
 
             idx += 1;
         }
 
-        if (windows.items.len == 0) break :main_loop;
-
-        interrupted = saw_events or try windows.items[0].backend.waitEventTimeout(min_wait_event_micros);
+        if (min_wait_event_micros != std.math.maxInt(u32)) {
+            min_wait_event_micros = @max(min_wait_event_micros, 1 / 120 * std.time.us_per_s);
+            std.Thread.sleep(min_wait_event_micros * std.time.ns_per_us);
+        } else {
+            std.Thread.sleep(1 / 60 * std.time.ns_per_s);
         }
-}
 
-fn createWindow(allocator: std.mem.Allocator, id: usize) !*WindowContext {
-    var ctx = try allocator.create(WindowContext);
-    errdefer allocator.destroy(ctx);
-
-    ctx.id = id;
-
-    const title_bytes = try std.fmt.allocPrint(allocator, "My DVUI App #{d}", .{id});
-    defer allocator.free(title_bytes);
-
-    ctx.title = try allocator.allocSentinel(u8, title_bytes.len, 0);
-    @memcpy(ctx.title[0..title_bytes.len], title_bytes);
-
-    ctx.backend = try SDLBackend.initWindow(.{
-        .allocator = allocator,
-        .size = .{ .w = 800.0, .h = 600.0 },
-        .title = ctx.title,
-        .vsync = true,
-    });
-    errdefer destroyBackendKeepingSDL(&ctx.backend);
-
-    const theme = switch (ctx.backend.preferredColorScheme() orelse .light) {
-        .light => dvui.Theme.builtin.adwaita_light,
-        .dark => dvui.Theme.builtin.adwaita_dark,
-    };
-
-    ctx.window = try dvui.Window.init(@src(), allocator, ctx.backend.backend(), .{ .theme = theme });
-    errdefer ctx.window.deinit();
-
-    return ctx;
+        if (windows.items.len == 0) break :main_loop;
+    }
 }
 
 fn closeWindow(windows: *std.ArrayList(*WindowContext), allocator: std.mem.Allocator, idx: usize) void {
@@ -140,48 +160,38 @@ fn closeWindow(windows: *std.ArrayList(*WindowContext), allocator: std.mem.Alloc
     allocator.destroy(ctx);
 }
 
-fn destroyBackendKeepingSDL(backend: *SDLBackend) void {
-    SDLBackend.c.SDL_DestroyRenderer(backend.renderer);
-    SDLBackend.c.SDL_DestroyWindow(backend.window);
-    backend.we_own_window = false;
-    backend.deinit();
-}
-
-fn windowId(ctx: *WindowContext) u32 {
-    return @intCast(SDLBackend.c.SDL_GetWindowID(ctx.backend.window));
-}
-
-fn eventWindowId(event: SDLBackend.c.SDL_Event) ?u32 {
+fn eventWindowId(event: sdl_c.SDL_Event) ?u32 {
     return switch (event.type) {
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_KEY_DOWN else SDLBackend.c.SDL_KEYDOWN => @intCast(event.key.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_KEY_UP else SDLBackend.c.SDL_KEYUP => @intCast(event.key.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_TEXT_INPUT else SDLBackend.c.SDL_TEXTINPUT => @intCast(event.text.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_TEXT_EDITING else SDLBackend.c.SDL_TEXTEDITING => @intCast(event.edit.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_MOUSE_MOTION else SDLBackend.c.SDL_MOUSEMOTION => @intCast(event.motion.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_MOUSE_BUTTON_DOWN else SDLBackend.c.SDL_MOUSEBUTTONDOWN => @intCast(event.button.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_MOUSE_BUTTON_UP else SDLBackend.c.SDL_MOUSEBUTTONUP => @intCast(event.button.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_MOUSE_WHEEL else SDLBackend.c.SDL_MOUSEWHEEL => @intCast(event.wheel.windowID),
-        if (SDLBackend.sdl3) SDLBackend.c.SDL_EVENT_WINDOW_CLOSE_REQUESTED else SDLBackend.c.SDL_WINDOWEVENT => @intCast(event.window.windowID),
+        sdl_c.SDL_EVENT_KEY_DOWN => @intCast(event.key.windowID),
+        sdl_c.SDL_EVENT_KEY_UP => @intCast(event.key.windowID),
+        sdl_c.SDL_EVENT_TEXT_INPUT => @intCast(event.text.windowID),
+        sdl_c.SDL_EVENT_TEXT_EDITING => @intCast(event.edit.windowID),
+        sdl_c.SDL_EVENT_MOUSE_MOTION => @intCast(event.motion.windowID),
+        sdl_c.SDL_EVENT_MOUSE_BUTTON_DOWN => @intCast(event.button.windowID),
+        sdl_c.SDL_EVENT_MOUSE_BUTTON_UP => @intCast(event.button.windowID),
+        sdl_c.SDL_EVENT_MOUSE_WHEEL => @intCast(event.wheel.windowID),
+        sdl_c.SDL_EVENT_WINDOW_FIRST...sdl_c.SDL_EVENT_WINDOW_LAST => @intCast(event.window.windowID),
         else => null,
     };
 }
 
 fn pumpEvents(windows: *std.ArrayList(*WindowContext)) !bool {
-    var event: SDLBackend.c.SDL_Event = undefined;
+    var event: sdl_c.SDL_Event = undefined;
     const poll_got_event = if (SDLBackend.sdl3) true else 1;
     var saw_event = false;
 
-    while (SDLBackend.c.SDL_PollEvent(&event) == poll_got_event) {
+    while (sdl_c.SDL_PollEvent(&event) == poll_got_event) {
         saw_event = true;
 
         if (eventWindowId(event)) |wid| {
             for (windows.items) |ctx| {
-                if (windowId(ctx) == wid) {
+                if (ctx.backend_id == wid) {
                     _ = try ctx.backend.addEvent(&ctx.window, event);
                     break;
                 }
             }
         } else {
+            //std.debug.print("null with: {any}\n", .{event.type});
             // broadcast events without a window target (like SDL_QUIT)
             for (windows.items) |ctx| {
                 _ = try ctx.backend.addEvent(&ctx.window, event);
@@ -195,7 +205,6 @@ fn pumpEvents(windows: *std.ArrayList(*WindowContext)) !bool {
 fn gui_frame(ctx: *WindowContext, allocator: std.mem.Allocator, windows: *std.ArrayList(*WindowContext), next_window_id: *usize) !bool {
     for (ctx.window.events.items) |*e| {
         if (e.evt == .window and e.evt.window.action == .close) return false;
-        // Treat SDL_QUIT as a global request; ignore here so other windows keep running.
     }
 
     var root = dvui.box(@src(), .{ .dir = .vertical }, .{ .expand = .both, .padding = dvui.Rect.all(12), .background = true, .style = .window });
@@ -203,11 +212,14 @@ fn gui_frame(ctx: *WindowContext, allocator: std.mem.Allocator, windows: *std.Ar
 
     dvui.label(@src(), "Window #{d}", .{ctx.id}, .{ .font_style = .title_2 });
     dvui.label(@src(), "Open windows: {d}", .{windows.items.len}, .{});
+    dvui.label(@src(), "Frame {d}, fps: {d}", .{ ctx.data.frame, dvui.FPS() }, .{});
+
+    ctx.data.frame += 1;
 
     if (dvui.button(@src(), "New window", .{}, .{})) {
         const id = next_window_id.*;
         next_window_id.* += 1;
-        const new_ctx = try createWindow(allocator, id);
+        const new_ctx = try WindowContext.init(allocator, id);
         try windows.append(allocator, new_ctx);
     }