pmilosev/screencast

## screencast
/*
 * 1) Download CocoaHTTPServer from Github: https://github.com/robbiehanson/CocoaHTTPServer
 * 2) Include the downloaded source (except the samples) in your project
 * 3) Define the SCREENCAST macro for the target/configuration you want to enable the screencast for (SCREENCAST=1)
 * 4) Add the code below to your main.m file before the main() method
*/

#if SCREENCAST
#import "HTTPServer.h"
#import "HTTPConnection.h"
#import "HTTPDataResponse.h"
#import <dispatch/dispatch.h>
#import <QuartzCore/QuartzCore.h>

HTTPServer *httpServer = nil;
NSData *imageData = nil;

CGImageRef UIGetScreenImage(void);
@interface ScreencastHTTPConnection : HTTPConnection {}
@end

@implementation ScreencastHTTPConnection

- (NSObject<HTTPResponse> *)httpResponseForMethod:(NSString *)method
                                              URI:(NSString *)path
{
    NSString *filePath = [self filePathForURI:path];
    NSString *documentRoot = [config documentRoot];
    NSString *relativePath = [filePath substringFromIndex:[documentRoot length]];

    /* check if the screen image needs to be returned */
    if ([relativePath hasPrefix:@"/screencast.jpg"]) {
        return [[HTTPDataResponse alloc] initWithData:imageData];
    }

    /* otherwise return the HTML */
    NSString *htmlContent = @"\
    <html>\
    <head>\
    <script type='text/JavaScript'>\
    var x=0, y=0;\
    var canvas, context, img;\
    function timedRefresh(timeoutPeriod)\
    {\
        canvas = document.getElementById('image');\
        context = canvas.getContext('2d');\
        img = new Image();\
        img.src = 'screencast.jpg?t=' + new Date().getTime();\
        img.onload = function() {\
            context.drawImage(img, x, y);\
            setTimeout('timedRefresh('+timeoutPeriod+')',timeoutPeriod);\
        };\
    }\
    </script>\
    <title>JavaScript Refresh Example</title>\
    </head>\
    <body onload='JavaScript:timedRefresh(10);'>\
    <canvas id='image' width='320px' height='480px'/>\
    </html>";

    NSData *htmlData = [htmlContent dataUsingEncoding:NSASCIIStringEncoding];
    return [[HTTPDataResponse alloc] initWithData:htmlData];
}
@end
#endif

/* Add the snippet bellow in your main() method, before the UIApplicationMain method call */
#if SCREENCAST
        /* start a worker thread that will continiously capture the screen */
        dispatch_queue_t worker =
            dispatch_queue_create("name.of.your.queue.here", NULL);
        dispatch_async(worker, ^{
            @autoreleasepool {
                // wait until the window is available for the application
                CALayer *layer = nil;
                while (!layer) {
                    usleep(50000);
                    layer = [[[[UIApplication sharedApplication]
                               windows] lastObject] layer];
                }

                // loop infinitly, retriving the image of the current screen
                while (true) {
                    @autoreleasepool {
                        UIGraphicsBeginImageContext(CGSizeMake(320, 480));
                        [layer renderInContext:UIGraphicsGetCurrentContext()];
                        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
                        UIGraphicsEndImageContext();

                        imageData = UIImageJPEGRepresentation(image, 0.0);
                        usleep(50000);
                    }
                }
            }
        });

        /* setup the server */
        httpServer = [HTTPServer new];
        [httpServer setPort:8080];
        [httpServer setConnectionClass:[ScreencastHTTPConnection class]];
        [httpServer setDocumentRoot:[[NSBundle mainBundle] resourcePath]];

        /* start the server */
        NSError *error = nil;
        if (![httpServer start:&error]) {
            NSLog(@"Can not start the HTTP server: %@", error);
        }
#endif
	/*
	* 1) Download CocoaHTTPServer from Github: https://github.com/robbiehanson/CocoaHTTPServer
	* 2) Include the downloaded source (except the samples) in your project
	* 3) Define the SCREENCAST macro for the target/configuration you want to enable the screencast for (SCREENCAST=1)
	* 4) Add the code below to your main.m file before the main() method
	*/

	#if SCREENCAST
	#import "HTTPServer.h"
	#import "HTTPConnection.h"
	#import "HTTPDataResponse.h"
	#import <dispatch/dispatch.h>
	#import <QuartzCore/QuartzCore.h>

	HTTPServer *httpServer = nil;
	NSData *imageData = nil;

	CGImageRef UIGetScreenImage(void);
	@interface ScreencastHTTPConnection : HTTPConnection {}
	@end

	@implementation ScreencastHTTPConnection

	- (NSObject<HTTPResponse> )httpResponseForMethod:(NSString )method
	URI:(NSString *)path
	{
	NSString *filePath = [self filePathForURI:path];
	NSString *documentRoot = [config documentRoot];
	NSString *relativePath = [filePath substringFromIndex:[documentRoot length]];

	/* check if the screen image needs to be returned */
	if ([relativePath hasPrefix:@"/screencast.jpg"]) {
	return [[HTTPDataResponse alloc] initWithData:imageData];
	}

	/* otherwise return the HTML */
	NSString *htmlContent = @"\
	<html>\
	<head>\
	<script type='text/JavaScript'>\
	var x=0, y=0;\
	var canvas, context, img;\
	function timedRefresh(timeoutPeriod)\
	{\
	canvas = document.getElementById('image');\
	context = canvas.getContext('2d');\
	img = new Image();\
	img.src = 'screencast.jpg?t=' + new Date().getTime();\
	img.onload = function() {\
	context.drawImage(img, x, y);\
	setTimeout('timedRefresh('+timeoutPeriod+')',timeoutPeriod);\
	};\
	}\
	</script>\
	<title>JavaScript Refresh Example</title>\
	</head>\
	<body onload='JavaScript:timedRefresh(10);'>\
	<canvas id='image' width='320px' height='480px'/>\
	</html>";

	NSData *htmlData = [htmlContent dataUsingEncoding:NSASCIIStringEncoding];
	return [[HTTPDataResponse alloc] initWithData:htmlData];
	}
	@end
	#endif

	/* Add the snippet bellow in your main() method, before the UIApplicationMain method call */
	#if SCREENCAST
	/* start a worker thread that will continiously capture the screen */
	dispatch_queue_t worker =
	dispatch_queue_create("name.of.your.queue.here", NULL);
	dispatch_async(worker, ^{
	@autoreleasepool {
	// wait until the window is available for the application
	CALayer *layer = nil;
	while (!layer) {
	usleep(50000);
	layer = [[[[UIApplication sharedApplication]
	windows] lastObject] layer];
	}

	// loop infinitly, retriving the image of the current screen
	while (true) {
	@autoreleasepool {
	UIGraphicsBeginImageContext(CGSizeMake(320, 480));
	[layer renderInContext:UIGraphicsGetCurrentContext()];
	UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
	UIGraphicsEndImageContext();

	imageData = UIImageJPEGRepresentation(image, 0.0);
	usleep(50000);
	}
	}
	}
	});

	/* setup the server */
	httpServer = [HTTPServer new];
	[httpServer setPort:8080];
	[httpServer setConnectionClass:[ScreencastHTTPConnection class]];
	[httpServer setDocumentRoot:[[NSBundle mainBundle] resourcePath]];

	/* start the server */
	NSError *error = nil;
	if (![httpServer start:&error]) {
	NSLog(@"Can not start the HTTP server: %@", error);
	}
	#endif