Implemented the X11-grabber (based on v4l code).

Former-commit-id: 17ad66ff7e2a1e3fae2d853e5360f791934b6563

src/hyperion-x11/hyperion-x11.cpp

@@ -0,0 +1,90 @@
+
+// QT includes
+#include <QCoreApplication>
+#include <QImage>
+
+// getoptPlusPLus includes
+#include <getoptPlusPlus/getoptpp.h>
+
+#include "ProtoWrapper.h"
+#include "X11Wrapper.h"
+
+using namespace vlofgren;
+
+// save the image as screenshot
+void saveScreenshot(const char * filename, const Image<ColorRgb> & image)
+{
+	// store as PNG
+	QImage pngImage((const uint8_t *) image.memptr(), image.width(), image.height(), 3*image.width(), QImage::Format_RGB888);
+	pngImage.save(filename);
+}
+
+int main(int argc, char ** argv)
+{
+	QCoreApplication app(argc, argv);
+
+	try
+	{
+		// create the option parser and initialize all parameters
+		OptionsParser optionParser("X11 capture application for Hyperion");
+		ParameterSet & parameters = optionParser.getParameters();
+
+		IntParameter           & argCropWidth       = parameters.add<IntParameter>          (0x0, "crop-width",       "Number of pixels to crop from the left and right sides in the picture before decimation [default=0]");
+		IntParameter           & argCropHeight      = parameters.add<IntParameter>          (0x0, "crop-height",      "Number of pixels to crop from the top and the bottom in the picture before decimation [default=0]");
+		IntParameter           & argSizeDecimation  = parameters.add<IntParameter>          ('s', "size-decimator",   "Decimation factor for the output size [default=1]");
+		SwitchParameter<>      & argScreenshot      = parameters.add<SwitchParameter<>>     (0x0, "screenshot",       "Take a single screenshot, save it to file and quit");
+		StringParameter        & argAddress         = parameters.add<StringParameter>       ('a', "address",          "Set the address of the hyperion server [default: 127.0.0.1:19445]");
+		IntParameter           & argPriority        = parameters.add<IntParameter>          ('p', "priority",         "Use the provided priority channel (the lower the number, the higher the priority) [default: 800]");
+		SwitchParameter<>      & argSkipReply       = parameters.add<SwitchParameter<>>     (0x0, "skip-reply",       "Do not receive and check reply messages from Hyperion");
+		SwitchParameter<>      & argHelp            = parameters.add<SwitchParameter<>>     ('h', "help",             "Show this help message and exit");
+
+		// set defaults
+		argCropWidth.setDefault(0);
+		argCropHeight.setDefault(0);
+		argSizeDecimation.setDefault(1);
+		argAddress.setDefault("127.0.0.1:19445");
+		argPriority.setDefault(800);
+
+		// parse all options
+		optionParser.parse(argc, const_cast<const char **>(argv));
+
+		// check if we need to display the usage. exit if we do.
+		if (argHelp.isSet())
+		{
+			optionParser.usage();
+			return 0;
+		}
+
+		// Create the X11 grabbing stuff
+		X11Wrapper x11Wrapper(argCropWidth.getValue(), argCropHeight.getValue(), argSizeDecimation.getValue());
+
+		if (argScreenshot.isSet())
+		{
+			// Capture a single screenshot and finish
+			const Image<ColorRgb> & screenshot = x11Wrapper.getScreenshot();
+			saveScreenshot("screenshot.png", screenshot);
+		}
+		else
+		{
+			// Create the Proto-connection with hyperiond
+			ProtoWrapper protoWrapper("127.0.0.1:19445", argSkipReply.isSet());
+
+			// Connect the screen capturing to the proto processing
+			QObject::connect(&x11Wrapper, SIGNAL(sig_screenshot(const Image<ColorRgb> &)), &protoWrapper, SLOT(process(Image<ColorRgb>)));
+
+			// Start the capturing
+			x11Wrapper.start();
+
+			// Start the application
+			app.exec();
+		}
+	}
+	catch (const std::runtime_error & e)
+	{
+		// An error occured. Display error and quit
+		std::cerr << e.what() << std::endl;
+		return -1;
+	}
+
+	return 0;
+}