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https://github.com/LadybirdBrowser/ladybird.git
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a698a58d3c
Rather than blitting and rendering each window every time, only render what actually changed. And while doing so, only render the portions that are visible on the screen. This avoids flickering because flipping framebuffers isn't always perfectly in sync with the code, so it's possible that the flip happens slightly delayed and we can briefly see the next iteration having partially completed. Also, avoid touching the mouse cursor unless it is in an area that needs updating. This reduces flickering unless it is over an area that is updated often. And because we no longer render the entire screen, we'll save the contents below the cursor so that we can hide it before touching that area. Fixes #2981
125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <LibCore/Object.h>
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#include <LibGfx/DisjointRectSet.h>
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#include <LibGfx/Forward.h>
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namespace WindowServer {
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class ClientConnection;
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class Cursor;
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class Window;
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enum class WallpaperMode {
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Simple,
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Tile,
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Center,
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Scaled,
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Unchecked
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};
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class Compositor final : public Core::Object {
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C_OBJECT(Compositor)
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public:
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static Compositor& the();
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void compose();
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void invalidate_window();
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void invalidate_screen();
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void invalidate_screen(const Gfx::IntRect&);
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bool set_resolution(int desired_width, int desired_height);
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bool set_background_color(const String& background_color);
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bool set_wallpaper_mode(const String& mode);
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bool set_wallpaper(const String& path, Function<void(bool)>&& callback);
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String wallpaper_path() const { return m_wallpaper_path; }
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void invalidate_cursor();
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Gfx::IntRect current_cursor_rect() const;
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void increment_display_link_count(Badge<ClientConnection>);
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void decrement_display_link_count(Badge<ClientConnection>);
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void invalidate_occlusions() { m_occlusions_dirty = true; }
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private:
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Compositor();
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void init_bitmaps();
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void flip_buffers();
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void flush(const Gfx::IntRect&);
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void draw_menubar();
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void run_animations(Gfx::DisjointRectSet&);
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void notify_display_links();
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void start_compose_async_timer();
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void recompute_occlusions();
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bool any_opaque_window_above_this_one_contains_rect(const Window&, const Gfx::IntRect&);
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void draw_cursor(const Gfx::IntRect&);
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void restore_cursor_back();
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bool draw_geometry_label(Gfx::IntRect&);
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RefPtr<Core::Timer> m_compose_timer;
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RefPtr<Core::Timer> m_immediate_compose_timer;
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bool m_flash_flush { false };
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bool m_buffers_are_flipped { false };
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bool m_screen_can_set_buffer { false };
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bool m_occlusions_dirty { true };
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bool m_invalidated_any { true };
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bool m_invalidated_window { false };
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bool m_invalidated_cursor { false };
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RefPtr<Gfx::Bitmap> m_front_bitmap;
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RefPtr<Gfx::Bitmap> m_back_bitmap;
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RefPtr<Gfx::Bitmap> m_temp_bitmap;
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OwnPtr<Gfx::Painter> m_back_painter;
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OwnPtr<Gfx::Painter> m_front_painter;
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OwnPtr<Gfx::Painter> m_temp_painter;
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Gfx::DisjointRectSet m_dirty_screen_rects;
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Gfx::DisjointRectSet m_opaque_wallpaper_rects;
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RefPtr<Gfx::Bitmap> m_cursor_back_bitmap;
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OwnPtr<Gfx::Painter> m_cursor_back_painter;
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Gfx::IntRect m_last_cursor_rect;
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Gfx::IntRect m_last_dnd_rect;
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Gfx::IntRect m_last_geometry_label_rect;
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String m_wallpaper_path;
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WallpaperMode m_wallpaper_mode { WallpaperMode::Unchecked };
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RefPtr<Gfx::Bitmap> m_wallpaper;
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RefPtr<Core::Timer> m_display_link_notify_timer;
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size_t m_display_link_count { 0 };
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};
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}
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