1 files changed, 108 insertions, 0 deletions
diff --git a/Services/WindowServer/Compositor.h b/Services/WindowServer/Compositor.h
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+++ b/Services/WindowServer/Compositor.h
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+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/OwnPtr.h>
+#include <AK/RefPtr.h>
+#include <LibCore/Object.h>
+#include <LibGfx/DisjointRectSet.h>
+#include <LibGfx/Forward.h>
+
+namespace WindowServer {
+
+class ClientConnection;
+class Cursor;
+
+enum class WallpaperMode {
+    Simple,
+    Tile,
+    Center,
+    Scaled,
+    Unchecked
+};
+
+class Compositor final : public Core::Object {
+    C_OBJECT(Compositor)
+public:
+    static Compositor& the();
+
+    void compose();
+    void invalidate();
+    void invalidate(const Gfx::Rect&);
+
+    bool set_resolution(int desired_width, int desired_height);
+
+    bool set_background_color(const String& background_color);
+
+    bool set_wallpaper_mode(const String& mode);
+
+    bool set_wallpaper(const String& path, Function<void(bool)>&& callback);
+    String wallpaper_path() const { return m_wallpaper_path; }
+
+    void invalidate_cursor();
+    Gfx::Rect current_cursor_rect() const;
+
+    void increment_display_link_count(Badge<ClientConnection>);
+    void decrement_display_link_count(Badge<ClientConnection>);
+
+private:
+    Compositor();
+    void init_bitmaps();
+    void flip_buffers();
+    void flush(const Gfx::Rect&);
+    void draw_cursor();
+    void draw_geometry_label();
+    void draw_menubar();
+    void run_animations();
+    void notify_display_links();
+
+    RefPtr<Core::Timer> m_compose_timer;
+    RefPtr<Core::Timer> m_immediate_compose_timer;
+    bool m_flash_flush { false };
+    bool m_buffers_are_flipped { false };
+    bool m_screen_can_set_buffer { false };
+
+    RefPtr<Gfx::Bitmap> m_front_bitmap;
+    RefPtr<Gfx::Bitmap> m_back_bitmap;
+    OwnPtr<Gfx::Painter> m_back_painter;
+    OwnPtr<Gfx::Painter> m_front_painter;
+
+    Gfx::DisjointRectSet m_dirty_rects;
+
+    Gfx::Rect m_last_cursor_rect;
+    Gfx::Rect m_last_dnd_rect;
+    Gfx::Rect m_last_geometry_label_rect;
+
+    String m_wallpaper_path;
+    WallpaperMode m_wallpaper_mode { WallpaperMode::Unchecked };
+    RefPtr<Gfx::Bitmap> m_wallpaper;
+
+    RefPtr<Core::Timer> m_display_link_notify_timer;
+    size_t m_display_link_count { 0 };
+};
+
+}