sdl3/examples/threaded_two_windows.php

<?php

/**
 * Simple example with 2 windows running in parallel threads
 * Requires: parallel extension
 */

require_once __DIR__ . '/../vendor/autoload.php';

use parallel\Runtime;
use parallel\Channel;

// Check if parallel extension is loaded
if (!extension_loaded('parallel')) {
    die("Error: parallel extension is not loaded. Install with: pecl install parallel\n");
}

echo "Starting 2 windows in parallel threads...\n";
echo "Each window runs independently in its own thread\n";
echo "Press ESC or close button to exit each window\n\n";

/**
 * Window function that runs in a thread
 */
$windowFunction = function(string $title, int $x, int $y, int $width, int $height, array $bgColor) {
    // Enable event queue mode
    rgfw_setQueueEvents(true);

    // Create window
    $window = rgfw_createWindow($title, $x, $y, $width, $height, 0);
    if (!$window) {
        throw new \Exception("Failed to create window: $title");
    }

    // Initialize RSGL renderer
    if (!rsgl_init($window)) {
        throw new \Exception("Failed to initialize RSGL for: $title");
    }

    [$r, $g, $b] = $bgColor;
    $running = true;
    $frameCount = 0;
    $mouseX = 0;
    $mouseY = 0;
    $isHovering = false;

    while ($running) {
        // Poll events for this window
        rgfw_pollEvents();

        // Process queued events
        while ($event = rgfw_window_checkQueuedEvent($window)) {
            switch ($event['type']) {
                case RGFW_quit:
                    $running = false;
                    break;

                case RGFW_keyPressed:
                    $keyCode = $event['keyCode'] ?? 0;
                    if ($keyCode == RGFW_Escape) {
                        $running = false;
                    }
                    break;

                case RGFW_mousePosChanged:
                    $mouseX = $event[0] ?? 0;
                    $mouseY = $event[1] ?? 0;

                    // Check if hovering over center rectangle
                    $rectSize = 100;
                    $rectX = ($width / 2) - ($rectSize / 2);
                    $rectY = ($height / 2) - ($rectSize / 2);

                    $isHovering = $mouseX >= $rectX && $mouseX <= ($rectX + $rectSize) &&
                                  $mouseY >= $rectY && $mouseY <= ($rectY + $rectSize);
                    break;

                case RGFW_mouseButtonPressed:
                    if ($isHovering) {
                        echo "$title - Rectangle clicked!\n";
                    }
                    break;
            }
        }

        // Check if window should close
        if (rgfw_window_shouldClose($window)) {
            $running = false;
        }

        // Clear with background color
        rsgl_clear($window, $r, $g, $b, 255);

        // Draw center rectangle
        $rectSize = 100;
        $rectX = ($width / 2) - ($rectSize / 2);
        $rectY = ($height / 2) - ($rectSize / 2);

        // White or yellow depending on hover state
        if ($isHovering) {
            rsgl_setColor($window, 255, 255, 100, 255); // Yellow on hover
        } else {
            rsgl_setColor($window, 255, 255, 255, 255); // White
        }
        rsgl_drawRectF($window, (int) $rectX, (int) $rectY, $rectSize, $rectSize);

        // Draw text showing frame count (if possible)
        $frameCount++;

        // Render and swap buffers
        rsgl_render($window);
        rgfw_window_swapBuffers($window);

        // ~60 FPS
        usleep(16666);
    }

    // Cleanup
    rsgl_close($window);
    rgfw_window_close($window);

    return "$title closed after $frameCount frames";
};

try {
    // Create first window in a thread (Red background)
    echo "Launching Window 1 (Red) in thread...\n";
    $runtime1 = new Runtime();
    $future1 = $runtime1->run($windowFunction, [
        'Window 1 - Red',
        100,
        100,
        400,
        300,
        [255, 100, 100]
    ]);

    // Create second window in a thread (Blue background)
    echo "Launching Window 2 (Blue) in thread...\n";
    $runtime2 = new Runtime();
    $future2 = $runtime2->run($windowFunction, [
        'Window 2 - Blue',
        550,
        100,
        400,
        300,
        [100, 100, 255]
    ]);

    echo "\nBoth windows launched!\n";
    echo "Hover over the center rectangles to see them change color\n";
    echo "Click on them to see messages in the console\n";
    echo "Main thread waiting for windows to close...\n\n";

    // Wait for first window
    echo "Waiting for Window 1...\n";
    $result1 = $future1->value();
    echo $result1 . "\n";

    // Wait for second window
    echo "Waiting for Window 2...\n";
    $result2 = $future2->value();
    echo $result2 . "\n";

    echo "\nAll windows closed. Application exiting.\n";

} catch (\Throwable $e) {
    echo "Error: " . $e->getMessage() . "\n";
    echo "Stack trace:\n" . $e->getTraceAsString() . "\n";
}