Add Allegro examples

README.md

@@ -1,4 +1,36 @@
 fimuni-c-cpp-examples
 =====================
 
-Examples related to talks at FI MUNI
+Examples related to talks at FI MUNI.
+
+Allegro
+-------
+
+Three examples for Allegro 5.0 library.
+- example-01 - display smiley
+- example-02 - display smiley when pressed space
+- example-03 - smiley follows mouse
+
+Requirements: Allegro 5.0 (works also with 5.1)
+Package for Debian: liballegro5-dev
+
+How to run:
+
+    cd allegro
+    make
+    ./example-01
+    ./example-02
+    ./example-03
+
+GTK+
+----
+
+Helloworld example from http://en.wikipedia.org/wiki/Gtk.
+Requires: GTK+-3
+Package for Debian: libgtk-3-dev
+
+How to run:
+
+    cd gtk
+    make
+    ./helloworld

allegro/Makefile

@@ -0,0 +1,25 @@
+
+EXAMPLE_OBJECTS_01 = example-01.o
+EXAMPLE_OBJECTS_02 = example-02.o
+EXAMPLE_OBJECTS_03 = example-03.o
+
+CFLAGS  = `pkg-config --cflags allegro-5.0 allegro_image-5.0`
+LDADD   = `pkg-config --libs allegro-5.0 allegro_image-5.0`
+
+all: example-01 example-02 example-03
+
+example-01: $(EXAMPLE_OBJECTS_01)
+	${CC} -o example-01 ${EXAMPLE_OBJECTS_01} ${LDADD}
+
+example-02: $(EXAMPLE_OBJECTS_02)
+	${CC} -o example-02 ${EXAMPLE_OBJECTS_02} ${LDADD}
+
+example-03: $(EXAMPLE_OBJECTS_03)
+	${CC} -o example-03 ${EXAMPLE_OBJECTS_03} ${LDADD}
+
+.c.o:
+	${CC} ${CFLAGS} -c $<
+
+clean:
+	rm -f example-01 example-02 example-03 *.o
+

allegro/example-01.c

@@ -0,0 +1,61 @@
+/**
+ * Example 01 - Allegro 5
+ * Display image
+ *
+ * Juraj Michalek - http://georgik.sinusgear.com
+ */
+
+#include <allegro5/allegro5.h>
+#include <allegro5/allegro_image.h>
+#include <stdio.h>
+
+
+int main()
+{
+	ALLEGRO_EVENT_QUEUE *event_queue;
+	ALLEGRO_DISPLAY *display;
+	
+	ALLEGRO_EVENT event;
+	ALLEGRO_BITMAP *image;
+
+	al_init();
+	al_install_keyboard();
+	al_init_image_addon();
+	
+	display = al_create_display(640, 480);
+	if (!display)
+	{
+		return 2;
+	}
+
+	// Create Event queue
+        event_queue = al_create_event_queue();
+
+	// Register Keyboard to queue
+    al_register_event_source(event_queue, al_get_keyboard_event_source());
+	al_register_event_source(event_queue, al_get_display_event_source(display));
+
+	// Clear screen
+	al_clear_to_color(al_map_rgb_f(1.0, 1.0, 1.0));
+	
+	// Load and display image
+	image = al_load_bitmap("smajlik.png");
+	if (image != NULL)
+	{
+		al_draw_bitmap(image, 10, 10, 0);
+	} else {
+		printf("No bitmap.\n");
+		return 1;
+	}
+	al_flip_display();
+
+	// Wait until some key is pressed
+	al_wait_for_event(event_queue, &event);
+
+	// Release
+	al_destroy_bitmap(image);
+	al_uninstall_keyboard();
+	al_uninstall_system();
+	return 0;
+}
+

allegro/example-02.c

@@ -0,0 +1,82 @@
+/**
+ * Example 02 - Allegro 5
+ * Display image based on keyboard events.
+ *
+ * Juraj Michalek - http://georgik.sinusgear.com
+ */
+
+#include <allegro5/allegro5.h>
+#include <allegro5/allegro_image.h>
+#include <stdio.h>
+
+
+int main()
+{
+	bool isStopSignal = false;
+	ALLEGRO_EVENT_QUEUE *event_queue;
+	ALLEGRO_DISPLAY *display;
+	
+	ALLEGRO_EVENT event;
+	ALLEGRO_BITMAP *image;
+
+	ALLEGRO_COLOR white = al_map_rgb_f(1.0, 1.0, 1.0);
+
+	al_init();
+	al_install_keyboard();
+	al_init_image_addon();
+	
+	display = al_create_display(640, 480);
+	if (!display)
+	{
+		return 2;
+	}
+
+	// Create Event queue
+        event_queue = al_create_event_queue();
+
+	// Register Keyboard to queue
+        al_register_event_source(event_queue, al_get_keyboard_event_source());
+	al_register_event_source(event_queue, al_get_display_event_source(display));
+
+	// Clear screen
+	al_clear_to_color(white);
+	
+	// Load and display image
+	image = al_load_bitmap("smajlik.png");
+	if (image == NULL)
+	{
+		printf("No bitmap.\n");
+		return 1;
+	}
+
+	
+	do {
+		al_get_next_event(event_queue, &event);
+
+		// Handle SPACE key - display smiley in case of pressed space
+		// Clear screen in case of other key
+		if (event.keyboard.keycode == ALLEGRO_KEY_SPACE) 
+		{
+			al_draw_bitmap(image, 10, 10, 0);
+		} else {
+			// Clear screen
+			al_clear_to_color(white);
+		}
+		al_flip_display();
+
+		// Handle ESC key
+		if (event.keyboard.keycode == ALLEGRO_KEY_ESCAPE)
+		{
+			isStopSignal = true;
+		}
+
+	} while (!isStopSignal);
+
+	// Release
+	al_destroy_bitmap(image);
+	al_uninstall_keyboard();
+	al_uninstall_system();
+	return 0;
+}
+
+

allegro/example-03.c

@@ -0,0 +1,77 @@
+/**
+ * Example 02 - Allegro 5
+ * Display image based on keyboard events.
+ *
+ * Juraj Michalek - http://georgik.sinusgear.com
+ */
+
+#include <allegro5/allegro5.h>
+#include <allegro5/allegro_image.h>
+#include <stdio.h>
+
+
+int main()
+{
+	bool isStopSignal = false;
+	ALLEGRO_EVENT_QUEUE *event_queue;
+	ALLEGRO_DISPLAY *display;
+	
+	ALLEGRO_EVENT event;
+	ALLEGRO_BITMAP *image;
+
+    ALLEGRO_MOUSE_STATE msestate;
+    ALLEGRO_KEYBOARD_STATE kbdstate;
+
+	ALLEGRO_COLOR white = al_map_rgb_f(1.0, 1.0, 1.0);
+
+	al_init();
+	al_install_keyboard();
+	al_init_image_addon();
+	
+	display = al_create_display(640, 480);
+	if (!display)
+	{
+		return 2;
+	}
+
+	// Create Event queue
+        event_queue = al_create_event_queue();
+
+	// Register Keyboard to queue
+    al_register_event_source(event_queue, al_get_keyboard_event_source());
+	al_register_event_source(event_queue, al_get_display_event_source(display));
+
+    // Register Mouse
+    al_install_mouse();
+
+	// Clear screen
+	al_clear_to_color(white);
+	
+	// Load and display image
+	image = al_load_bitmap("smajlik.png");
+	if (image == NULL)
+	{
+		printf("No bitmap.\n");
+		return 1;
+	}
+
+	
+	do {
+        al_get_mouse_state(&msestate);
+        al_get_keyboard_state(&kbdstate);
+        
+	    al_clear_to_color(white);	
+		al_draw_bitmap(image, msestate.x, msestate.y, 0);
+	
+		al_flip_display();
+	} while (!al_key_down(&kbdstate, ALLEGRO_KEY_ESCAPE));
+
+	// Release
+	al_destroy_bitmap(image);
+    al_uninstall_mouse();
+	al_uninstall_keyboard();
+	al_uninstall_system();
+	return 0;
+}
+
+