#include <allegro.h>
void increment_speed_counter();
volatile long speed_counter = 0;
int main(int argc, char *argv[])
{
allegro_init();
install_keyboard();
install_timer();
LOCK_VARIABLE(speed_counter);
LOCK_FUNCTION(increment_speed_counter);
install_int_ex(increment_speed_counter, BPS_TO_TIMER(60));
set_color_depth(16);
set_gfx_mode(GFX_AUTODETECT, 640,480,0,0);
BITMAP *my_pic;
my_pic = load_bitmap("image.bmp", NULL);
BITMAP *buffer;
buffer = create_bitmap(640,480);
int my_pic_x = 0;
int my_pic_y = 0;
while(!key[KEY_ESC])
{
while(speed_counter > 0)
{
if(key[KEY_RIGHT])
{
my_pic_x++;
}
else if(key[KEY_LEFT])
{
my_pic_x--;
}
else if(key[KEY_UP])
{
my_pic_y--;
}
else if(key[KEY_DOWN])
{
my_pic_y++;
}
speed_counter--;
}
draw_sprite(buffer, my_pic, my_pic_x, my_pic_y);
blit(buffer, screen, 0,0,0,0,640,480);
clear_bitmap(buffer);
}
destroy_bitmap(my_pic);
destroy_bitmap(buffer);
return 0;
}
END_OF_MAIN();
void increment_speed_counter()
{
speed_counter++;
}
END_OF_FUNCTION(increment_speed_counter);


This is the main.cpp file.
The file "image.bmp" DOES exist, but nothing shows up. Just blackness...

Whats wrong?

Do you have the image.bmp in the same folder as the source code?

If you do, then maybe giving allegro a more specific path to use may help:


my_pic = load_bitmap("c:\image.bmp", NULL);

Just my guess, never actually worked with allegro before and dont know alot of C++ , but I know enough to read through a C++ program and tell what it does and to me the source looks fine.

Yesh, they're both in the same folder:
D:\C++\main.cpp
D:\C++\image.bmp

Program works fine, but the image just doesn't appear.

Maybe it's something wrong with the image?

#include <allegro.h>
void increment_speed_counter();
volatile long speed_counter = 0;
int main(int argc, char *argv[])
{
allegro_init();
install_keyboard();
install_timer();
LOCK_VARIABLE(speed_counter);
LOCK_FUNCTION(increment_speed_counter);
install_int_ex(increment_speed_counter, BPS_TO_TIMER(60));
set_color_depth(16);
set_gfx_mode(GFX_AUTODETECT, 640,480,0,0);
BITMAP *my_pic;
my_pic = load_bitmap("image.bmp", NULL);
BITMAP *buffer;
buffer = create_bitmap(640,480);
int my_pic_x = 0;
int my_pic_y = 0;
while(!key[KEY_ESC])
{
while(speed_counter > 0)
{
if(key[KEY_RIGHT])
{
my_pic_x++;
}
else if(key[KEY_LEFT])
{
my_pic_x--;
}
else if(key[KEY_UP])
{
my_pic_y--;
}
else if(key[KEY_DOWN])
{
my_pic_y++;
}
speed_counter--;
}
draw_sprite(buffer, my_pic, my_pic_x, my_pic_y);
blit(buffer, screen, 0,0,0,0,640,480);
clear_bitmap(buffer);
}
destroy_bitmap(my_pic);
destroy_bitmap(buffer);
return 0;
}
END_OF_MAIN();
void increment_speed_counter()
{
speed_counter++;
}
END_OF_FUNCTION(increment_speed_counter);


This is the main.cpp file.
The file "image.bmp" DOES exist, but nothing shows up. Just blackness...

Whats wrong?
I'am not quite sure about allegro since I haven't used it in a while, but I think the drawing and all should be done before searching for the input. Basically blitting before Pressing keys =).

Actually this is an example program from one of the tutorial sites.

I'll try doing that.