Allegro 5 is the fifth version of the Allegro game programming library for C/C++ developers. It is not backwards compatible with Allegro 4. It is distributed freely, and it supports the following platforms: Unix (Linux, FreeBSD, etc.), Windows, OS X, and iOS.
Questions tagged [allegro5]
316 questions
25
votes
5 answers
fatal error LNK1169: one or more multiply defined symbols found in game programming
I've been training to use object orientated programming in c++ but I keep getting this error:
1>main.obj : error LNK2005: "int WIDTH" (?WIDTH@@3HA) already defined in GameObject.obj
1>main.obj : error LNK2005: "int HEIGHT" (?HEIGHT@@3HA) already…
Ted
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11
votes
0 answers
Allegro 5 crashes on calling al_clear_to_color(ALLEGRO_COLOR)
I'm starting at Allegro 5, but soon I got stuck in the second hello-world-like program I'm coding. After some debugging, I concluded that the program crashes when it calls the function al_clear_to_color(ALLEGRO_COLOR). I've tried linking allegro…
Bruno Garcia
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6
votes
2 answers
The procedure entry point _gxx_personality_v0 could not be located in the dynamic link library libstdc++-6.dll Error
Yesterday I decided to download, install, and attempt to use Allegro 5. I also downloaded Code::Blocks 12.11 w/ the MinGW compiler. I set up everything and installed everything correctly (or so I thought) and tried to run a sample code to see if it…
TobyFromMarketing
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6
votes
2 answers
Allegro 5 game: game loop that runs at constant speed?
What is the best way to code a game loop in Allegro 5 that always runs at the same speed, and that properly separates drawing logic from update logic? Should I use threads or not? Should I make use of the new Allegro event system?
amarillion
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5
votes
0 answers
Need some help to choose beetween Allegro 5, SDL 1.2, SDL 1.3 or SFML
I won't start a debate about which library is better, it would be against the rule, but more ask a series of technical question. When i ask if there is special technique, just say the name of the technique, or a link.
Don't forget, im comparing also…
user1115057
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5
votes
1 answer
How to debug shared libraries compiled with debug information
I'm compiling a program with debug simbols that links to a shared library (liballegro) also compiled with debug symbols. When I try to step into a function of this shared library I can't see any code.
file myBin
mybin: ELF 64-bit LSB shared object,…
Bungow
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5
votes
1 answer
Allegro 5 game: How do I set a resolution that is appropriate for the aspect ratio of the screen?
Using Allegro 5, how do initialize a game in fullscreen mode so that it respects the format of the screen (widescreen 16:9 vs normal 3:4)
al_create_display (w, h)
Let's you select any ratio you want. For example you can set 640x480, regardless of…
amarillion
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4
votes
2 answers
Performance of running a multithreaded program on a single core by setting affinity?
In short:
Under what scenarios can running a multithreaded app on a single core destroy performance?
What about setting the affinity of a multithreaded app to only use one core?
In long:
I'm trying to run the physics of a 2D engine on it's own…
NaturalDre
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4
votes
1 answer
D3DERR_INVALIDCALL in d3d->CreateDevice causing window flicker on startup in Allegro 5 D3D program
I'm working on debugging window creation flicker when creating an Allegro 5 Direct3D window with multi sampling enabled. I've narrowed the problem down to window creation in allegro's d3d_disp.cpp source file. However, I can't get any debug output…
BugSquasher
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4
votes
1 answer
Undefined symbols for architecture x86_64 in C
Today I installed the Allegro game programming library for C and I’ve tried to include one of the header files but when I try to execute gcc -I./include example.c -o a.exe in the terminal, I keep on getting this error:
Undefined symbols for…
Calculus5000
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4
votes
1 answer
Playing sound file in C with Allegro5
I am trying to play wav file in C with allegro5 and I wrote below code:
#include
#include
#include
#include
int main(int argc, char **argv){
ALLEGRO_DISPLAY…
Osman Villi
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4
votes
1 answer
allegro5 - How to run on Linux?
I set up Allegro 5, and could compile the following code with success:
#include
#include
#include
#include
#include
void error(char *msg)
{
fprintf(stderr,"%s : %s\n", msg,…
陳文炳
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4
votes
1 answer
allegro 5 performing events at a certain interval
I'm making my first game in allegro 5, it's a snake game. In order to move the snake game I'd want to use a squared grid which I made, so the snake moves at regular intervals.
How can I use timers to make an event happen at a certain amount of…
Bugster
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3
votes
1 answer
How do I bundle the Allegro library with a Ubuntu Allegro application?
I got the Allegro dev libraries, wrote and compiled a simple application, and ran it on my computer, and it worked fine. I had a friend test it, but it did not do anything when double clicked. I think the problem is that he does not have the Allegro…
awesomeguy
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3
votes
3 answers
How come allegro automatically handles minimize button, but not close button?
Here is a sample from Allegro5 tutorial: (to see the original sample, follow the link, I've simplified it a bit for illustratory purposes.
#include
int main(int argc, char **argv)
{
ALLEGRO_DISPLAY *display = NULL;
…
Armen Tsirunyan
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