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serenity/Userland/Services/WindowServer/Compositor.cpp
Nico Weber 2ec6bbd7a1 LibGfx: Add a draw_scaled_bitmap() variant that takes a FloatRect as src_rect 
Consider

    draw_scaled_bitmap({0, 0, 10, 10}, source, {0, 0, 5, 5}).

Imagine wanting to split that up into two calls, like e.g. the
compositor when redrawing the background with damage rects. You really
want to be able to say

    draw_scaled_bitmap({0, 0, 5, 10}, source, {0, 0, 2.5, 5})

but up to now you couldn't. Now you can.

This makes painting very low-res images (such as tile.png) in mode
"stretch" work much better.
2021-01-22 22:13:53 +01:00

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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.
*/
#include "Compositor.h"
#include "ClientConnection.h"
#include "Event.h"
#include "EventLoop.h"
#include "Screen.h"
#include "Window.h"
#include "WindowManager.h"
#include <AK/Memory.h>
#include <AK/ScopeGuard.h>
#include <LibCore/Timer.h>
#include <LibGfx/Font.h>
#include <LibGfx/Painter.h>
#include <LibGfx/StylePainter.h>
#include <LibThread/BackgroundAction.h>
//#define COMPOSE_DEBUG
//#define OCCLUSIONS_DEBUG
namespace WindowServer {
Compositor& Compositor::the()
{
static Compositor s_the;
return s_the;
}
static WallpaperMode mode_to_enum(const String& name)
{
if (name == "simple")
return WallpaperMode::Simple;
if (name == "tile")
return WallpaperMode::Tile;
if (name == "center")
return WallpaperMode::Center;
if (name == "stretch")
return WallpaperMode::Stretch;
return WallpaperMode::Simple;
}
Compositor::Compositor()
{
m_display_link_notify_timer = add<Core::Timer>(
1000 / 60, [this] {
notify_display_links();
});
m_display_link_notify_timer->stop();
m_compose_timer = Core::Timer::create_single_shot(
1000 / 60,
[this] {
compose();
},
this);
m_immediate_compose_timer = Core::Timer::create_single_shot(
0,
[this] {
compose();
},
this);
m_screen_can_set_buffer = Screen::the().can_set_buffer();
init_bitmaps();
}
void Compositor::init_bitmaps()
{
auto& screen = Screen::the();
auto size = screen.size();
m_front_bitmap = Gfx::Bitmap::create_wrapper(Gfx::BitmapFormat::RGB32, size, screen.scale_factor(), screen.pitch(), screen.scanline(0));
m_front_painter = make<Gfx::Painter>(*m_front_bitmap);
if (m_screen_can_set_buffer)
m_back_bitmap = Gfx::Bitmap::create_wrapper(Gfx::BitmapFormat::RGB32, size, screen.scale_factor(), screen.pitch(), screen.scanline(screen.physical_height()));
else
m_back_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGB32, size, screen.scale_factor());
m_back_painter = make<Gfx::Painter>(*m_back_bitmap);
m_temp_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGB32, size, screen.scale_factor());
m_temp_painter = make<Gfx::Painter>(*m_temp_bitmap);
m_buffers_are_flipped = false;
invalidate_screen();
}
void Compositor::did_construct_window_manager(Badge<WindowManager>)
{
auto& wm = WindowManager::the();
m_wallpaper_mode = mode_to_enum(wm.config()->read_entry("Background", "Mode", "simple"));
m_custom_background_color = Color::from_string(wm.config()->read_entry("Background", "Color", ""));
invalidate_screen();
invalidate_occlusions();
compose();
}
void Compositor::compose()
{
auto& wm = WindowManager::the();
auto& ws = Screen::the();
{
auto& current_cursor = wm.active_cursor();
if (m_current_cursor != &current_cursor)
change_cursor(&current_cursor);
}
if (!m_invalidated_any) {
// nothing dirtied since the last compose pass.
return;
}
if (m_occlusions_dirty) {
m_occlusions_dirty = false;
recompute_occlusions();
}
auto dirty_screen_rects = move(m_dirty_screen_rects);
dirty_screen_rects.add(m_last_geometry_label_damage_rect.intersected(ws.rect()));
dirty_screen_rects.add(m_last_dnd_rect.intersected(ws.rect()));
if (m_invalidated_cursor) {
if (wm.dnd_client())
dirty_screen_rects.add(wm.dnd_rect().intersected(ws.rect()));
}
// Mark window regions as dirty that need to be re-rendered
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
auto frame_rect = window.frame().rect();
for (auto& dirty_rect : dirty_screen_rects.rects()) {
auto invalidate_rect = dirty_rect.intersected(frame_rect);
if (!invalidate_rect.is_empty()) {
auto inner_rect_offset = window.rect().location() - frame_rect.location();
invalidate_rect.move_by(-(frame_rect.location() + inner_rect_offset));
window.invalidate_no_notify(invalidate_rect);
m_invalidated_window = true;
}
}
window.prepare_dirty_rects();
return IterationDecision::Continue;
});
// Any windows above or below a given window that need to be re-rendered
// also require us to re-render that window's intersecting area, regardless
// of whether that window has any dirty rectangles
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
auto& transparency_rects = window.transparency_rects();
if (transparency_rects.is_empty())
return IterationDecision::Continue;
auto frame_rect = window.frame().rect();
auto& dirty_rects = window.dirty_rects();
wm.for_each_visible_window_from_back_to_front([&](Window& w) {
if (&w == &window)
return IterationDecision::Continue;
auto frame_rect2 = w.frame().rect();
if (!frame_rect2.intersects(frame_rect))
return IterationDecision::Continue;
transparency_rects.for_each_intersected(w.dirty_rects(), [&](const Gfx::IntRect& intersected_dirty) {
dirty_rects.add(intersected_dirty);
return IterationDecision::Continue;
});
return IterationDecision::Continue;
});
return IterationDecision::Continue;
});
Color background_color = wm.palette().desktop_background();
if (m_custom_background_color.has_value())
background_color = m_custom_background_color.value();
#ifdef COMPOSE_DEBUG
dbg() << "COMPOSE: invalidated: window:" << m_invalidated_window << " cursor:" << m_invalidated_cursor << " any: " << m_invalidated_any;
for (auto& r : dirty_screen_rects.rects())
dbg() << "dirty screen: " << r;
#endif
Gfx::DisjointRectSet flush_rects;
Gfx::DisjointRectSet flush_transparent_rects;
Gfx::DisjointRectSet flush_special_rects;
auto cursor_rect = current_cursor_rect();
bool need_to_draw_cursor = false;
auto check_restore_cursor_back = [&](const Gfx::IntRect& rect) {
if (!need_to_draw_cursor && rect.intersects(cursor_rect)) {
// Restore what's behind the cursor if anything touches the area of the cursor
need_to_draw_cursor = true;
restore_cursor_back();
}
};
auto prepare_rect = [&](const Gfx::IntRect& rect) {
#ifdef COMPOSE_DEBUG
dbg() << " -> flush opaque: " << rect;
#endif
ASSERT(!flush_rects.intersects(rect));
ASSERT(!flush_transparent_rects.intersects(rect));
flush_rects.add(rect);
check_restore_cursor_back(rect);
};
auto prepare_transparency_rect = [&](const Gfx::IntRect& rect) {
#ifdef COMPOSE_DEBUG
dbg() << " -> flush transparent: " << rect;
#endif
ASSERT(!flush_rects.intersects(rect));
bool have_rect = false;
for (auto& r : flush_transparent_rects.rects()) {
if (r == rect) {
have_rect = true;
break;
}
}
if (!have_rect) {
flush_transparent_rects.add(rect);
check_restore_cursor_back(rect);
}
};
if (!m_cursor_back_bitmap || m_invalidated_cursor)
check_restore_cursor_back(cursor_rect);
auto back_painter = *m_back_painter;
auto temp_painter = *m_temp_painter;
auto paint_wallpaper = [&](Gfx::Painter& painter, const Gfx::IntRect& rect) {
// FIXME: If the wallpaper is opaque, no need to fill with color!
painter.fill_rect(rect, background_color);
if (m_wallpaper) {
if (m_wallpaper_mode == WallpaperMode::Simple) {
painter.blit(rect.location(), *m_wallpaper, rect);
} else if (m_wallpaper_mode == WallpaperMode::Center) {
Gfx::IntPoint offset { (ws.width() - m_wallpaper->width()) / 2, (ws.height() - m_wallpaper->height()) / 2 };
painter.blit_offset(rect.location(), *m_wallpaper, rect, offset);
} else if (m_wallpaper_mode == WallpaperMode::Tile) {
painter.draw_tiled_bitmap(rect, *m_wallpaper);
} else if (m_wallpaper_mode == WallpaperMode::Stretch) {
float hscale = (float)m_wallpaper->width() / (float)ws.width();
float vscale = (float)m_wallpaper->height() / (float)ws.height();
// TODO: this may look ugly, we should scale to a backing bitmap and then blit
auto src_rect = Gfx::FloatRect { rect.x() * hscale, rect.y() * vscale, rect.width() * hscale, rect.height() * vscale };
painter.draw_scaled_bitmap(rect, *m_wallpaper, src_rect);
} else {
ASSERT_NOT_REACHED();
}
}
};
m_opaque_wallpaper_rects.for_each_intersected(dirty_screen_rects, [&](const Gfx::IntRect& render_rect) {
#ifdef COMPOSE_DEBUG
dbg() << " render wallpaper opaque: " << render_rect;
#endif
prepare_rect(render_rect);
paint_wallpaper(back_painter, render_rect);
return IterationDecision::Continue;
});
auto compose_window = [&](Window& window) -> IterationDecision {
auto frame_rect = window.frame().rect();
if (!frame_rect.intersects(ws.rect()))
return IterationDecision::Continue;
auto frame_rects = frame_rect.shatter(window.rect());
#ifdef COMPOSE_DEBUG
dbg() << " window " << window.title() << " frame rect: " << frame_rect;
#endif
RefPtr<Gfx::Bitmap> backing_store = window.backing_store();
auto compose_window_rect = [&](Gfx::Painter& painter, const Gfx::IntRect& rect) {
if (!window.is_fullscreen()) {
rect.for_each_intersected(frame_rects, [&](const Gfx::IntRect& intersected_rect) {
// TODO: Should optimize this to use a backing buffer
Gfx::PainterStateSaver saver(painter);
painter.add_clip_rect(intersected_rect);
#ifdef COMPOSE_DEBUG
dbg() << " render frame: " << intersected_rect;
#endif
window.frame().paint(painter);
return IterationDecision::Continue;
});
}
if (!backing_store) {
if (window.is_opaque())
painter.fill_rect(window.rect().intersected(rect), wm.palette().window());
return;
}
// Decide where we would paint this window's backing store.
// This is subtly different from widow.rect(), because window
// size may be different from its backing store size. This
// happens when the window has been resized and the client
// has not yet attached a new backing store. In this case,
// we want to try to blit the backing store at the same place
// it was previously, and fill the rest of the window with its
// background color.
Gfx::IntRect backing_rect;
backing_rect.set_size(backing_store->size());
switch (WindowManager::the().resize_direction_of_window(window)) {
case ResizeDirection::None:
case ResizeDirection::Right:
case ResizeDirection::Down:
case ResizeDirection::DownRight:
backing_rect.set_location(window.rect().location());
break;
case ResizeDirection::Left:
case ResizeDirection::Up:
case ResizeDirection::UpLeft:
backing_rect.set_right_without_resize(window.rect().right());
backing_rect.set_bottom_without_resize(window.rect().bottom());
break;
case ResizeDirection::UpRight:
backing_rect.set_left(window.rect().left());
backing_rect.set_bottom_without_resize(window.rect().bottom());
break;
case ResizeDirection::DownLeft:
backing_rect.set_right_without_resize(window.rect().right());
backing_rect.set_top(window.rect().top());
break;
}
Gfx::IntRect dirty_rect_in_backing_coordinates = rect.intersected(window.rect())
.intersected(backing_rect)
.translated(-backing_rect.location());
if (dirty_rect_in_backing_coordinates.is_empty())
return;
auto dst = backing_rect.location().translated(dirty_rect_in_backing_coordinates.location());
if (window.client() && window.client()->is_unresponsive()) {
painter.blit_filtered(dst, *backing_store, dirty_rect_in_backing_coordinates, [](Color src) {
return src.to_grayscale().darkened(0.75f);
});
} else {
painter.blit(dst, *backing_store, dirty_rect_in_backing_coordinates, window.opacity());
}
if (window.is_opaque()) {
for (auto background_rect : window.rect().shatter(backing_rect))
painter.fill_rect(background_rect, wm.palette().window());
}
};
auto& dirty_rects = window.dirty_rects();
#ifdef COMPOSE_DEBUG
for (auto& dirty_rect : dirty_rects.rects())
dbg() << " dirty: " << dirty_rect;
for (auto& r : window.opaque_rects().rects())
dbg() << " opaque: " << r;
for (auto& r : window.transparency_rects().rects())
dbg() << " transparent: " << r;
#endif
// Render opaque portions directly to the back buffer
auto& opaque_rects = window.opaque_rects();
if (!opaque_rects.is_empty()) {
opaque_rects.for_each_intersected(dirty_rects, [&](const Gfx::IntRect& render_rect) {
#ifdef COMPOSE_DEBUG
dbg() << " render opaque: " << render_rect;
#endif
prepare_rect(render_rect);
Gfx::PainterStateSaver saver(back_painter);
back_painter.add_clip_rect(render_rect);
compose_window_rect(back_painter, render_rect);
return IterationDecision::Continue;
});
}
// Render the wallpaper for any transparency directly covering
// the wallpaper
auto& transparency_wallpaper_rects = window.transparency_wallpaper_rects();
if (!transparency_wallpaper_rects.is_empty()) {
transparency_wallpaper_rects.for_each_intersected(dirty_rects, [&](const Gfx::IntRect& render_rect) {
#ifdef COMPOSE_DEBUG
dbg() << " render wallpaper: " << render_rect;
#endif
prepare_transparency_rect(render_rect);
paint_wallpaper(temp_painter, render_rect);
return IterationDecision::Continue;
});
}
auto& transparency_rects = window.transparency_rects();
if (!transparency_rects.is_empty()) {
transparency_rects.for_each_intersected(dirty_rects, [&](const Gfx::IntRect& render_rect) {
#ifdef COMPOSE_DEBUG
dbg() << " render transparent: " << render_rect;
#endif
prepare_transparency_rect(render_rect);
Gfx::PainterStateSaver saver(temp_painter);
temp_painter.add_clip_rect(render_rect);
compose_window_rect(temp_painter, render_rect);
return IterationDecision::Continue;
});
}
return IterationDecision::Continue;
};
// Paint the window stack.
if (m_invalidated_window) {
if (auto* fullscreen_window = wm.active_fullscreen_window()) {
compose_window(*fullscreen_window);
} else {
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
compose_window(window);
window.clear_dirty_rects();
return IterationDecision::Continue;
});
}
// Check that there are no overlapping transparent and opaque flush rectangles
ASSERT(![&]() {
for (auto& rect_transparent : flush_transparent_rects.rects()) {
for (auto& rect_opaque : flush_rects.rects()) {
if (rect_opaque.intersects(rect_transparent)) {
dbg() << "Transparent rect " << rect_transparent << " overlaps opaque rect: " << rect_opaque << ": " << rect_opaque.intersected(rect_transparent);
return true;
}
}
}
return false;
}());
// Copy anything rendered to the temporary buffer to the back buffer
for (auto& rect : flush_transparent_rects.rects())
back_painter.blit(rect.location(), *m_temp_bitmap, rect);
Gfx::IntRect geometry_label_damage_rect;
if (draw_geometry_label(geometry_label_damage_rect))
flush_special_rects.add(geometry_label_damage_rect);
}
m_invalidated_any = false;
m_invalidated_window = false;
m_invalidated_cursor = false;
if (wm.dnd_client()) {
auto dnd_rect = wm.dnd_rect();
// TODO: render once into a backing bitmap, then just blit...
auto render_dnd = [&]() {
back_painter.fill_rect(dnd_rect, wm.palette().selection().with_alpha(200));
back_painter.draw_rect(dnd_rect, wm.palette().selection());
if (!wm.dnd_text().is_empty()) {
auto text_rect = dnd_rect;
if (wm.dnd_bitmap())
text_rect.move_by(wm.dnd_bitmap()->width() + 8, 0);
back_painter.draw_text(text_rect, wm.dnd_text(), Gfx::TextAlignment::CenterLeft, wm.palette().selection_text());
}
if (wm.dnd_bitmap()) {
back_painter.blit(dnd_rect.top_left().translated(4, 4), *wm.dnd_bitmap(), wm.dnd_bitmap()->rect());
}
};
dirty_screen_rects.for_each_intersected(dnd_rect, [&](const Gfx::IntRect& render_rect) {
Gfx::PainterStateSaver saver(back_painter);
back_painter.add_clip_rect(render_rect);
render_dnd();
return IterationDecision::Continue;
});
flush_transparent_rects.for_each_intersected(dnd_rect, [&](const Gfx::IntRect& render_rect) {
Gfx::PainterStateSaver saver(back_painter);
back_painter.add_clip_rect(render_rect);
render_dnd();
return IterationDecision::Continue;
});
m_last_dnd_rect = dnd_rect;
} else {
if (!m_last_dnd_rect.is_empty()) {
invalidate_screen(m_last_dnd_rect);
m_last_dnd_rect = {};
}
}
run_animations(flush_special_rects);
if (need_to_draw_cursor) {
flush_rects.add(cursor_rect);
if (cursor_rect != m_last_cursor_rect)
flush_rects.add(m_last_cursor_rect);
draw_cursor(cursor_rect);
}
if (m_flash_flush) {
for (auto& rect : flush_rects.rects())
m_front_painter->fill_rect(rect, Color::Yellow);
}
if (m_screen_can_set_buffer)
flip_buffers();
for (auto& rect : flush_rects.rects())
flush(rect);
for (auto& rect : flush_transparent_rects.rects())
flush(rect);
for (auto& rect : flush_special_rects.rects())
flush(rect);
}
void Compositor::flush(const Gfx::IntRect& a_rect)
{
auto rect = Gfx::IntRect::intersection(a_rect, Screen::the().rect());
// Almost everything in Compositor is in logical coordinates, with the painters having
// a scale applied. But this routine accesses the backbuffer pixels directly, so it
// must work in physical coordinates.
rect = rect * Screen::the().scale_factor();
Gfx::RGBA32* front_ptr = m_front_bitmap->scanline(rect.y()) + rect.x();
Gfx::RGBA32* back_ptr = m_back_bitmap->scanline(rect.y()) + rect.x();
size_t pitch = m_back_bitmap->pitch();
// NOTE: The meaning of a flush depends on whether we can flip buffers or not.
//
// If flipping is supported, flushing means that we've flipped, and now we
// copy the changed bits from the front buffer to the back buffer, to keep
// them in sync.
//
// If flipping is not supported, flushing means that we copy the changed
// rects from the backing bitmap to the display framebuffer.
Gfx::RGBA32* to_ptr;
const Gfx::RGBA32* from_ptr;
if (m_screen_can_set_buffer) {
to_ptr = back_ptr;
from_ptr = front_ptr;
} else {
to_ptr = front_ptr;
from_ptr = back_ptr;
}
for (int y = 0; y < rect.height(); ++y) {
fast_u32_copy(to_ptr, from_ptr, rect.width());
from_ptr = (const Gfx::RGBA32*)((const u8*)from_ptr + pitch);
to_ptr = (Gfx::RGBA32*)((u8*)to_ptr + pitch);
}
}
void Compositor::invalidate_screen()
{
invalidate_screen(Screen::the().rect());
}
void Compositor::invalidate_screen(const Gfx::IntRect& screen_rect)
{
m_dirty_screen_rects.add(screen_rect.intersected(Screen::the().rect()));
if (m_invalidated_any)
return;
m_invalidated_any = true;
m_invalidated_window = true;
start_compose_async_timer();
}
void Compositor::invalidate_window()
{
if (m_invalidated_window)
return;
m_invalidated_window = true;
m_invalidated_any = true;
start_compose_async_timer();
}
void Compositor::start_compose_async_timer()
{
// We delay composition by a timer interval, but to not affect latency too
// much, if a pending compose is not already scheduled, we also schedule an
// immediate compose the next spin of the event loop.
if (!m_compose_timer->is_active()) {
m_compose_timer->start();
m_immediate_compose_timer->start();
}
}
bool Compositor::set_background_color(const String& background_color)
{
auto color = Color::from_string(background_color);
if (!color.has_value())
return false;
m_custom_background_color = color;
auto& wm = WindowManager::the();
wm.config()->write_entry("Background", "Color", background_color);
bool ret_val = wm.config()->sync();
if (ret_val)
Compositor::invalidate_screen();
return ret_val;
}
bool Compositor::set_wallpaper_mode(const String& mode)
{
auto& wm = WindowManager::the();
wm.config()->write_entry("Background", "Mode", mode);
bool ret_val = wm.config()->sync();
if (ret_val) {
m_wallpaper_mode = mode_to_enum(mode);
Compositor::invalidate_screen();
}
return ret_val;
}
bool Compositor::set_wallpaper(const String& path, Function<void(bool)>&& callback)
{
LibThread::BackgroundAction<RefPtr<Gfx::Bitmap>>::create(
[path] {
return Gfx::Bitmap::load_from_file(path);
},
[this, path, callback = move(callback)](RefPtr<Gfx::Bitmap> bitmap) {
m_wallpaper_path = path;
m_wallpaper = move(bitmap);
invalidate_screen();
callback(true);
});
return true;
}
void Compositor::flip_buffers()
{
ASSERT(m_screen_can_set_buffer);
swap(m_front_bitmap, m_back_bitmap);
swap(m_front_painter, m_back_painter);
Screen::the().set_buffer(m_buffers_are_flipped ? 0 : 1);
m_buffers_are_flipped = !m_buffers_are_flipped;
}
void Compositor::run_animations(Gfx::DisjointRectSet& flush_rects)
{
static const int minimize_animation_steps = 10;
auto& painter = *m_back_painter;
Gfx::PainterStateSaver saver(painter);
painter.set_draw_op(Gfx::Painter::DrawOp::Invert);
WindowManager::the().for_each_window([&](Window& window) {
if (window.in_minimize_animation()) {
int animation_index = window.minimize_animation_index();
auto from_rect = window.is_minimized() ? window.frame().rect() : window.taskbar_rect();
auto to_rect = window.is_minimized() ? window.taskbar_rect() : window.frame().rect();
float x_delta_per_step = (float)(from_rect.x() - to_rect.x()) / minimize_animation_steps;
float y_delta_per_step = (float)(from_rect.y() - to_rect.y()) / minimize_animation_steps;
float width_delta_per_step = (float)(from_rect.width() - to_rect.width()) / minimize_animation_steps;
float height_delta_per_step = (float)(from_rect.height() - to_rect.height()) / minimize_animation_steps;
Gfx::IntRect rect {
from_rect.x() - (int)(x_delta_per_step * animation_index),
from_rect.y() - (int)(y_delta_per_step * animation_index),
from_rect.width() - (int)(width_delta_per_step * animation_index),
from_rect.height() - (int)(height_delta_per_step * animation_index)
};
#ifdef MINIMIZE_ANIMATION_DEBUG
dbg() << "Minimize animation from " << from_rect << " to " << to_rect << " frame# " << animation_index << " " << rect;
#endif
painter.draw_rect(rect, Color::Transparent); // Color doesn't matter, we draw inverted
flush_rects.add(rect);
invalidate_screen(rect);
window.step_minimize_animation();
if (window.minimize_animation_index() >= minimize_animation_steps)
window.end_minimize_animation();
}
return IterationDecision::Continue;
});
}
bool Compositor::set_resolution(int desired_width, int desired_height, int scale_factor)
{
auto screen_rect = Screen::the().rect();
if (screen_rect.width() == desired_width && screen_rect.height() == desired_height && Screen::the().scale_factor() == scale_factor)
return true;
// Make sure it's impossible to set an invalid resolution
if (!(desired_width >= 640 && desired_height >= 480 && scale_factor >= 1)) {
dbg() << "Compositor: Tried to set invalid resolution: " << desired_width << "x" << desired_height << " @ " << scale_factor << "x";
return false;
}
int old_scale_factor = Screen::the().scale_factor();
bool success = Screen::the().set_resolution(desired_width, desired_height, scale_factor);
if (success && old_scale_factor != scale_factor)
WindowManager::the().reload_icon_bitmaps_after_scale_change();
init_bitmaps();
invalidate_occlusions();
compose();
return success;
}
Gfx::IntRect Compositor::current_cursor_rect() const
{
auto& wm = WindowManager::the();
auto& current_cursor = m_current_cursor ? *m_current_cursor : wm.active_cursor();
return { Screen::the().cursor_location().translated(-current_cursor.params().hotspot()), current_cursor.size() };
}
void Compositor::invalidate_cursor(bool compose_immediately)
{
if (m_invalidated_cursor)
return;
m_invalidated_cursor = true;
m_invalidated_any = true;
if (compose_immediately)
compose();
else
start_compose_async_timer();
}
bool Compositor::draw_geometry_label(Gfx::IntRect& geometry_label_damage_rect)
{
auto& wm = WindowManager::the();
auto* window_being_moved_or_resized = wm.m_move_window ? wm.m_move_window.ptr() : (wm.m_resize_window ? wm.m_resize_window.ptr() : nullptr);
if (!window_being_moved_or_resized) {
m_last_geometry_label_damage_rect = {};
return false;
}
auto geometry_string = window_being_moved_or_resized->rect().to_string();
if (!window_being_moved_or_resized->size_increment().is_null()) {
int width_steps = (window_being_moved_or_resized->width() - window_being_moved_or_resized->base_size().width()) / window_being_moved_or_resized->size_increment().width();
int height_steps = (window_being_moved_or_resized->height() - window_being_moved_or_resized->base_size().height()) / window_being_moved_or_resized->size_increment().height();
geometry_string = String::formatted("{} ({}x{})", geometry_string, width_steps, height_steps);
}
auto geometry_label_rect = Gfx::IntRect { 0, 0, wm.font().width(geometry_string) + 16, wm.font().glyph_height() + 10 };
geometry_label_rect.center_within(window_being_moved_or_resized->rect());
auto& back_painter = *m_back_painter;
back_painter.fill_rect(geometry_label_rect.translated(1, 1), Color(Color::Black).with_alpha(80));
Gfx::StylePainter::paint_button(back_painter, geometry_label_rect.translated(-1, -1), wm.palette(), Gfx::ButtonStyle::Normal, false);
back_painter.draw_text(geometry_label_rect.translated(-1, -1), geometry_string, Gfx::TextAlignment::Center, wm.palette().window_text());
geometry_label_damage_rect = geometry_label_rect.inflated(2, 2);
m_last_geometry_label_damage_rect = geometry_label_damage_rect;
return true;
}
void Compositor::change_cursor(const Cursor* cursor)
{
if (m_current_cursor == cursor)
return;
m_current_cursor = cursor;
m_current_cursor_frame = 0;
if (m_cursor_timer) {
m_cursor_timer->stop();
m_cursor_timer = nullptr;
}
if (cursor && cursor->params().frames() > 1 && cursor->params().frame_ms() != 0) {
m_cursor_timer = add<Core::Timer>(
cursor->params().frame_ms(), [this, cursor] {
if (m_current_cursor != cursor)
return;
auto frames = cursor->params().frames();
if (++m_current_cursor_frame >= frames)
m_current_cursor_frame = 0;
invalidate_cursor(true);
});
}
}
void Compositor::draw_cursor(const Gfx::IntRect& cursor_rect)
{
auto& wm = WindowManager::the();
if (!m_cursor_back_bitmap || m_cursor_back_bitmap->size() != cursor_rect.size() || m_cursor_back_bitmap->scale() != Screen::the().scale_factor()) {
m_cursor_back_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGB32, cursor_rect.size(), Screen::the().scale_factor());
m_cursor_back_painter = make<Gfx::Painter>(*m_cursor_back_bitmap);
}
auto& current_cursor = m_current_cursor ? *m_current_cursor : wm.active_cursor();
m_cursor_back_painter->blit({ 0, 0 }, *m_back_bitmap, current_cursor.rect().translated(cursor_rect.location()).intersected(Screen::the().rect()));
m_back_painter->blit(cursor_rect.location(), current_cursor.bitmap(), current_cursor.source_rect(m_current_cursor_frame));
m_last_cursor_rect = cursor_rect;
}
void Compositor::restore_cursor_back()
{
if (!m_cursor_back_bitmap || m_cursor_back_bitmap->scale() != m_back_bitmap->scale())
return;
auto last_cursor_rect = m_last_cursor_rect.intersected(Screen::the().rect());
m_back_painter->blit(last_cursor_rect.location(), *m_cursor_back_bitmap, { { 0, 0 }, last_cursor_rect.size() });
}
void Compositor::notify_display_links()
{
ClientConnection::for_each_client([](auto& client) {
client.notify_display_link({});
});
}
void Compositor::increment_display_link_count(Badge<ClientConnection>)
{
++m_display_link_count;
if (m_display_link_count == 1)
m_display_link_notify_timer->start();
}
void Compositor::decrement_display_link_count(Badge<ClientConnection>)
{
ASSERT(m_display_link_count);
--m_display_link_count;
if (!m_display_link_count)
m_display_link_notify_timer->stop();
}
bool Compositor::any_opaque_window_above_this_one_contains_rect(const Window& a_window, const Gfx::IntRect& rect)
{
bool found_containing_window = false;
bool checking = false;
WindowManager::the().for_each_visible_window_from_back_to_front([&](Window& window) {
if (&window == &a_window) {
checking = true;
return IterationDecision::Continue;
}
if (!checking)
return IterationDecision::Continue;
if (!window.is_visible())
return IterationDecision::Continue;
if (window.is_minimized())
return IterationDecision::Continue;
if (!window.is_opaque())
return IterationDecision::Continue;
if (window.frame().rect().contains(rect)) {
found_containing_window = true;
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return found_containing_window;
};
void Compositor::recompute_occlusions()
{
auto& wm = WindowManager::the();
wm.for_each_visible_window_from_back_to_front([&](Window& window) {
if (wm.m_switcher.is_visible()) {
window.set_occluded(false);
} else {
if (any_opaque_window_above_this_one_contains_rect(window, window.frame().rect()))
window.set_occluded(true);
else
window.set_occluded(false);
}
return IterationDecision::Continue;
});
#ifdef OCCLUSIONS_DEBUG
dbgln("OCCLUSIONS:");
#endif
auto screen_rect = Screen::the().rect();
if (auto* fullscreen_window = wm.active_fullscreen_window()) {
WindowManager::the().for_each_visible_window_from_front_to_back([&](Window& w) {
auto& visible_opaque = w.opaque_rects();
auto& transparency_rects = w.transparency_rects();
auto& transparency_wallpaper_rects = w.transparency_wallpaper_rects();
if (&w == fullscreen_window) {
if (w.is_opaque()) {
visible_opaque = screen_rect;
transparency_rects.clear();
transparency_wallpaper_rects.clear();
} else {
visible_opaque.clear();
transparency_rects = screen_rect;
transparency_wallpaper_rects = screen_rect;
}
} else {
visible_opaque.clear();
transparency_rects.clear();
transparency_wallpaper_rects.clear();
}
return IterationDecision::Continue;
});
m_opaque_wallpaper_rects.clear();
} else {
Gfx::DisjointRectSet visible_rects(screen_rect);
bool have_transparent = false;
WindowManager::the().for_each_visible_window_from_front_to_back([&](Window& w) {
auto window_frame_rect = w.frame().rect().intersected(screen_rect);
w.transparency_wallpaper_rects().clear();
auto& visible_opaque = w.opaque_rects();
auto& transparency_rects = w.transparency_rects();
if (w.is_minimized() || window_frame_rect.is_empty()) {
visible_opaque.clear();
transparency_rects.clear();
return IterationDecision::Continue;
}
Gfx::DisjointRectSet opaque_covering;
if (w.is_opaque()) {
visible_opaque = visible_rects.intersected(window_frame_rect);
transparency_rects.clear();
} else {
visible_opaque.clear();
transparency_rects = visible_rects.intersected(window_frame_rect);
}
bool found_this_window = false;
WindowManager::the().for_each_visible_window_from_back_to_front([&](Window& w2) {
if (!found_this_window) {
if (&w == &w2)
found_this_window = true;
return IterationDecision::Continue;
}
if (w2.is_minimized())
return IterationDecision::Continue;
auto window_frame_rect2 = w2.frame().rect().intersected(screen_rect);
auto covering_rect = window_frame_rect2.intersected(window_frame_rect);
if (covering_rect.is_empty())
return IterationDecision::Continue;
if (w2.is_opaque()) {
opaque_covering.add(covering_rect);
if (opaque_covering.contains(window_frame_rect)) {
// This window is entirely covered by another opaque window
visible_opaque.clear();
transparency_rects.clear();
return IterationDecision::Break;
}
if (!visible_opaque.is_empty()) {
auto uncovered_opaque = visible_opaque.shatter(covering_rect);
visible_opaque = move(uncovered_opaque);
}
if (!transparency_rects.is_empty()) {
auto uncovered_transparency = transparency_rects.shatter(covering_rect);
transparency_rects = move(uncovered_transparency);
}
} else {
visible_rects.for_each_intersected(covering_rect, [&](const Gfx::IntRect& intersected) {
transparency_rects.add(intersected);
if (!visible_opaque.is_empty()) {
auto uncovered_opaque = visible_opaque.shatter(intersected);
visible_opaque = move(uncovered_opaque);
}
return IterationDecision::Continue;
});
}
return IterationDecision::Continue;
});
if (!transparency_rects.is_empty())
have_transparent = true;
ASSERT(!visible_opaque.intersects(transparency_rects));
if (w.is_opaque()) {
// Determine visible area for the window below
auto visible_rects_below_window = visible_rects.shatter(window_frame_rect);
visible_rects = move(visible_rects_below_window);
}
return IterationDecision::Continue;
});
if (have_transparent) {
// Determine what transparent window areas need to render the wallpaper first
WindowManager::the().for_each_visible_window_from_back_to_front([&](Window& w) {
auto& transparency_wallpaper_rects = w.transparency_wallpaper_rects();
if (w.is_opaque() || w.is_minimized()) {
transparency_wallpaper_rects.clear();
return IterationDecision::Continue;
}
Gfx::DisjointRectSet& transparency_rects = w.transparency_rects();
if (transparency_rects.is_empty()) {
transparency_wallpaper_rects.clear();
return IterationDecision::Continue;
}
transparency_wallpaper_rects = visible_rects.intersected(transparency_rects);
auto remaining_visible = visible_rects.shatter(transparency_wallpaper_rects);
visible_rects = move(remaining_visible);
return IterationDecision::Continue;
});
}
m_opaque_wallpaper_rects = move(visible_rects);
}
#ifdef OCCLUSIONS_DEBUG
for (auto& r : m_opaque_wallpaper_rects.rects())
dbg() << " wallpaper opaque: " << r;
#endif
wm.for_each_visible_window_from_back_to_front([&](Window& w) {
auto window_frame_rect = w.frame().rect().intersected(screen_rect);
if (w.is_minimized() || window_frame_rect.is_empty())
return IterationDecision::Continue;
#ifdef OCCLUSIONS_DEBUG
dbg() << " Window " << w.title() << " frame rect: " << window_frame_rect;
for (auto& r : w.opaque_rects().rects())
dbg() << " opaque: " << r;
for (auto& r : w.transparency_wallpaper_rects().rects())
dbg() << " transparent wallpaper: " << r;
for (auto& r : w.transparency_rects().rects())
dbg() << " transparent: " << r;
#endif
ASSERT(!w.opaque_rects().intersects(m_opaque_wallpaper_rects));
ASSERT(!w.transparency_rects().intersects(m_opaque_wallpaper_rects));
ASSERT(!w.transparency_wallpaper_rects().intersects(m_opaque_wallpaper_rects));
return IterationDecision::Continue;
});
}
}
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