#include <allegro.h> // You must include the Allegro Header fileint main(int argc, char *argv[]) {	allegro_init(); // Initialize Allegro 	install_keyboard(); // Initialize keyboard routines	set_color_depth(16); // Set the color depth	set_gfx_mode(GFX_AUTODETECT, 640,480,0,0); // Change our graphics mode to 640x480	BITMAP *my_pic = NULL; // Declare a BITMAP called my_pic, setting it's initial value to NULL	my_pic = load_bitmap("picture.bmp", NULL); // Load our picture	blit(my_pic, screen, 0,0,0,0,480,360); //Draw the whole bitmap to the screen at (0,0)	readkey();// Wait untill a key is pressed	destroy_bitmap(my_pic); //Release the bitmap data	return 0; // Exit with no errors }END_OF_MAIN()

/*******************Allegro Newbie TutorialbyLoomSofthttp://loomsoft.netemail: jay@loomsoft.net*******************//* Allegro Newbie Tutorial : Lesson 2 - Bitmaps  * This lesson will initialize allegro, set up keyboard support,  * show a single bitmap, then wait for a keypress. Upon the keypress  * the program will then quit. */// Here is your first line. You must include the allegro header file or else nothing will work!#include <allegro.h> // You must include the Allegro Header file/* Our generic main function. */int main(int argc, char *argv[]) {		// Now we want to initialize allegro just as we did in our last lesson.	allegro_init(); // Initialize Allegro 	// Now we want to install the keyboard just as we did in our last lesson.		install_keyboard(); // Initialize keyboard routines		/* This next step is something new. When you actually draw bitmaps to the screen you must 	 * specify a color depth that the screen will have.	 * 	 * set_color_depth will change the current color depth. 	 * 	 * Available depths are 8,15,16, 24, and 32. 	 * A color depth of 8 requires a pallete to be loaded with each bitmap, so we will not use it. 	 * A color depth of 32 can use a lot of resources, so we will either use 15 or 16 in order to ensure 	 * maximum compatabiliy between machines.	 *	 * Make sure that you change the color depth before you change the screen resolution. 	 * If you fail to do so, your bitmaps will not display with the correct colors!	 */	set_color_depth(16); // Set the color depth	set_gfx_mode(GFX_AUTODETECT, 640,480,0,0); // Change our graphics mode to 640x480		/* This is the BITMAP structure. 	 * Every time you want to create an image to display, or to draw to, 	 * you must declare it with BITMAP, just like when you want an integer, 	 * you declare it with int. Since BITMAP in the allegro libarary is a pointer, 	 * every instance of a bitmap you create must be preceded by a *	 */	BITMAP *my_pic = NULL; // Declare a BITMAP called my_pic, setting it's initial value to NULL		/* Now, the bitmap my_pic is "empty". In order to load a picture into it, 	 * you must call the function load_bitmap(); 	 *	 * Next, we will load a bitmap image from the hard disk into the bitmap my_pic.	 *	 * Here are what the parameters mean:     *	load_bitmap("Location of the bitmap", pallete);	 *	 * In place of the pallete, we will pass NULL - meaning that no pallete is used/needed. 	 *	 * We can't just call the function load_bitmap by itself, however. 	 * We must specify that we are loading the bitmap into the memory of my_pic. It is done like so: 	 * (note, the bitmap must actually exist at this location. If not, the program will crash when 	 * trying to load it. Functions exist to check for such errors, but they will be left out for 	 * now to keep this lesson ultra-simple)	 */	my_pic = load_bitmap("picture.bmp", NULL); // Load our picture	 	 	/* Now that our bitmap is loaded into memory, we want to display it onto the screen. 	 * To do this we use a function called blit. Here are the parameters: 	 *	 * blit(bitmap to draw, destination bitmap (usually the screen), clip x, clip y, x position, y position, width, height); 	 *	 * As you can see, blit offers a lot of functionality. 	 * The clipx and clipy will be the upper left hand corner of the bitmap that you want to copy. 	 * For instance, if you use 0,0 - you will get the bitmap from the top left corner exactly. 	 * However, if you use 50,50 - you will get the bitmap using the position 50,50 as the upper left hand 	 * corner. You also need to specity the width and height. This will allow you to clip the image from the 	 * other sides. Don't worry, we will demonstrate all the capabilities of blitting in the upcoming lessons.	 * 	 * Now, lets just display the entire bitmap in the upper left hand corner of the screen	 */	blit(my_pic, screen, 0,0,0,0,480,360); //Draw the whole bitmap to the screen at (0,0)		/* We now want to wait for a keypress before we exit the program. */	readkey();// Wait untill a key is pressed		/* The next step is critical before exiting the program.	 * The destroy_bitmap function is used to clear out the space in memory that a bitmap was utilizing. 	 * Make sure you destroy all bitmaps that you used in your program, so garbage data doesn't stay behind in memory.	 */	destroy_bitmap(my_pic); //Release the bitmap data		/* Return 0 at the end of main, indicating a exit without errors */	return 0; // Exit with no errors }/* Add the allegro specific END_OF_MAIN() */END_OF_MAIN() // This must be called right after the closing bracket of your MAIN function. 			  // It is Allegro specific.