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Breakout: Only paint areas that needs to be updated

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This commit is contained in:
Karol Kosek 2021-07-12 01:11:31 +02:00 committed by Andreas Kling
parent 2e3df52862
commit 67e3daa679
Notes: sideshowbarker 2024-07-19 17:26:16 +09:00 
Author: https://github.com/krkk
Commit: https://github.com/SerenityOS/serenity/commit/67e3daa679b
Pull-request: https://github.com/SerenityOS/serenity/pull/8679
2 changed files with 42 additions and 11 deletions
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38
Userland/Games/Breakout/Game.cpp
View File

@ -10,7 +10,6 @@
#include <LibGUI/Application.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Font.h>
#include <LibGfx/StandardCursor.h>
#include <unistd.h>
@ -33,14 +32,19 @@ Game::~Game()
void Game::reset_paddle()
{
update(enclosing_int_rect(m_paddle.rect));
m_paddle.moving_left = false;
m_paddle.moving_right = false;
m_paddle.rect = { game_width / 2 - 40, game_height - 20, 80, 16 };
update(enclosing_int_rect(m_paddle.rect));
}
void Game::reset()
{
update(lives_left_rect());
m_lives = 3;
update(lives_left_rect());
m_pause_count = 0;
m_cheater = false;
reset_ball();
@ -83,12 +87,16 @@ void Game::generate_bricks()
if (m_board != -1) {
m_bricks = boards[m_board];
for (auto& brick : m_bricks)
update(enclosing_int_rect(brick.rect));
} else {
// Rainbow
for (int row = 0; row < 7; ++row) {
for (int column = 0; column < 10; ++column) {
Brick brick(row, column, colors[row]);
m_bricks.append(brick);
update(enclosing_int_rect(brick.rect));
}
}
}
@ -105,7 +113,7 @@ void Game::set_paused(bool paused)
set_override_cursor(Gfx::StandardCursor::Hidden);
}
update();
update(pause_rect());
}
void Game::timer_event(Core::TimerEvent&)
@ -131,15 +139,11 @@ void Game::paint_event(GUI::PaintEvent& event)
painter.fill_rect(enclosing_int_rect(brick.rect), brick.color);
}
int msg_width = font().width(String::formatted("Lives: {}", m_lives));
int msg_height = font().glyph_height();
painter.draw_text({ (game_width - msg_width - 2), 2, msg_width, msg_height }, String::formatted("Lives: {}", m_lives), Gfx::TextAlignment::Center, Color::White);
painter.draw_text(lives_left_rect(), String::formatted("Lives: {}", m_lives), Gfx::TextAlignment::Center, Color::White);
if (m_paused) {
const char* msg = m_cheater ? "C H E A T E R" : "P A U S E D";
int msg_width = font().width(msg);
int msg_height = font().glyph_height();
painter.draw_text({ (game_width / 2) - (msg_width / 2), (game_height / 2) - (msg_height / 2), msg_width, msg_height }, msg, Gfx::TextAlignment::Center, Color::White);
painter.draw_text(pause_rect(), msg, Gfx::TextAlignment::Center, Color::White);
}
}
@ -182,10 +186,12 @@ void Game::mousemove_event(GUI::MouseEvent& event)
{
if (m_paused)
return;
update(enclosing_int_rect(m_paddle.rect));
float new_paddle_x = event.x() - m_paddle.rect.width() / 2;
new_paddle_x = max(0.0f, new_paddle_x);
new_paddle_x = min(game_width - m_paddle.rect.width(), new_paddle_x);
m_paddle.rect.set_x(new_paddle_x);
update(enclosing_int_rect(m_paddle.rect));
}
void Game::reset_ball()
@ -199,17 +205,20 @@ void Game::reset_ball()
if (get_random<u32>() % 2)
velocity_x = velocity_x * -1;
update(enclosing_int_rect(m_ball.rect()));
m_ball = {};
m_ball.position = { position_x, position_y };
m_ball.velocity = { velocity_x, velocity_y };
update(enclosing_int_rect(m_ball.rect()));
}
void Game::hurt()
{
stop_timer();
update(lives_left_rect());
m_lives--;
update(lives_left_rect());
if (m_lives <= 0) {
update();
GUI::MessageBox::show(window(), "You lose!", "Breakout", GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OK);
reset();
}
@ -237,6 +246,8 @@ void Game::tick()
auto new_ball = m_ball;
new_ball.position += new_ball.velocity;
update(enclosing_int_rect(m_ball.rect()));
if (new_ball.x() < new_ball.radius || new_ball.x() > game_width - new_ball.radius) {
new_ball.position.set_x(m_ball.x());
new_ball.velocity.set_x(new_ball.velocity.x() * -1);
@ -252,6 +263,8 @@ void Game::tick()
return;
}
update(enclosing_int_rect(new_ball.rect()));
if (new_ball.rect().intersects(m_paddle.rect)) {
new_ball.position.set_y(m_ball.y());
new_ball.velocity.set_y(new_ball.velocity.y() * -1);
@ -275,6 +288,7 @@ void Game::tick()
new_ball.position.set_y(m_ball.y());
new_ball.velocity.set_y(new_ball.velocity.y() * -1);
}
update(enclosing_int_rect(brick.rect));
break;
}
}
@ -293,18 +307,20 @@ void Game::tick()
}
if (m_paddle.moving_left) {
update(enclosing_int_rect(m_paddle.rect));
m_paddle.rect.set_x(max(0.0f, m_paddle.rect.x() - m_paddle.speed));
update(enclosing_int_rect(m_paddle.rect));
}
if (m_paddle.moving_right) {
update(enclosing_int_rect(m_paddle.rect));
m_paddle.rect.set_x(min(game_width - m_paddle.rect.width(), m_paddle.rect.x() + m_paddle.speed));
update(enclosing_int_rect(m_paddle.rect));
}
m_ball = new_ball;
if (m_pause_count > 50)
m_cheater = true;
update();
}
}

15
Userland/Games/Breakout/Game.h
View File

@ -7,6 +7,7 @@
#pragma once
#include <LibGUI/Widget.h>
#include <LibGfx/Font.h>
namespace Breakout {
@ -76,6 +77,20 @@ private:
}
};
Gfx::IntRect lives_left_rect() const
{
int msg_width = font().width(String::formatted("Lives: {}", m_lives));
return { (game_width - msg_width - 2), 2, msg_width, font().glyph_height() };
}
Gfx::IntRect pause_rect() const
{
const char* msg = m_cheater ? "C H E A T E R" : "P A U S E D";
int msg_width = font().width(msg);
int msg_height = font().glyph_height();
return { (game_width / 2) - (msg_width / 2), (game_height / 2) - (msg_height / 2), msg_width, msg_height };
}
bool m_paused;
int m_lives;
int m_board;