Simple DirectMedia Layer (SDL) is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer.

learn more… | top users | synonyms

0
votes
2answers
2k views

SDL Function for Loading PNGs

I'm learning SDL 2.0 at the moment and I've seen this method for loading BMPs: SDL_Texture* LoadImage(std::string file) { SDL_Surface *loadedImage = nullptr; SDL_Texture *texture = nullptr; ...
1
vote
2answers
366 views

Recasting and Drawing in SDL

I have some code that essentially draws a column on the screen of a wall in a raycasting-type 3d engine. I am trying to optimize it, as it takes about 10 milliseconds do draw a million pixels using ...
0
votes
1answer
137 views

SDL 1.3 on Windows 7. Better hardware,lower FPS [closed]

I've just moved from one PC to another.I've been developing a game in SDL with SDL_image and SDL_ttf for about one year. On my old pc, I had about 90 FPS on my game, but now I have about 30, witch I ...
-1
votes
1answer
425 views

How is destructable terrain made in SDL?

I'm looking for terrain that gets removed in chunks (like in Worms, of instance). How do you do this in SDL?
1
vote
5answers
5k views

OpenGL Insanely Slow [closed]

I'm learning C++, and I'm writing my first OpenGL program. Unfortunately, it seems to be defaulting to Software Rendering (CPU uses bounces, GPU uses stays at 1%). I'm using SDL as the Windowing ...
6
votes
4answers
11k views

Wavefront *.obj loader in C++

I'm creating a game using OpenGL (via SDL) and C++ (via Visual Studios 2010 Professional). During the game, I will be using 3D character animation. I'd like to use wavefront *.obj files for all the 3D ...
0
votes
1answer
2k views

OpenGL + SDL Linking Problem [closed]

So I'm trying to write a simple application with SDL 1.2 and OpenGL. This a stripped down version of the code containing the one problem I'm having. //The headers #include "SDL.h" #include ...
1
vote
0answers
59 views

Glowing Effect and Blending [duplicate]

I am using C++ and SDL and I am trying to get lines with a glowing effect as provided by the image of the game Defcon on the continental outlines. How could I achieve this glow and blend of the ...
2
votes
3answers
560 views

Efficient Collision Detection With Numerous Objects at Once [duplicate]

I am developing a 2D game with very large levels in which two teams(around 200 objects per team) fight against each other in planes, tanks, turrets,...etc. With every entity shooting bullets at their ...
0
votes
1answer
73 views

SDL - BlitSurfaced Background Slowing Time Based Movement

Whenever I use BlitSurface to apply a background image, the movement of my characters is slowed drastically even though I have movement based on time: SDL_BlitSurface( background, camera, screen, ...
0
votes
2answers
267 views

joystick movement for Geometry Wars clone

I am kinda new in game programming, but I've got a semestral work to make a game, so I decided to do a clone of Geometry Wars. Despite that the game is really simple (in principle), I have ran into a ...
-2
votes
1answer
447 views

SDL_BlitSurface does not works

I have an issue with the SDL_BlitSurface... When I blit (SDL_BlitSurface) in a transparent (background) surface, it does not blits, actually I tried all the existants functions ...
0
votes
1answer
59 views

SDL text or additional images not loading

I've got a basic side scroller that allows the user to run and jump around. I've used various tutorials to get this far, but I can't seem to get any text to render, no matter what method. I also can't ...
2
votes
1answer
2k views

Trap mouse in SDL2

When using SDL 1.2 it the way to implement full screen or windowed applications with "no cursor" you did the following: SDL_ShowCursor(SDL_DISABLE); SDL_WM_GrabInput(SDL_GRAB_ON); See Trap mouse in ...
5
votes
1answer
474 views

Does SDL running on Mac OS not recognize Xbox controllers?

I'm trying to learn a bit of SDL, and have been bouncing between Windows and Mac platforms, but am noticing that an SDL program running on my Macbook doesn't recognize the presence of the Xbox ...
-1
votes
1answer
589 views

OpenGL/SDL2 window stopped rendering [closed]

I have been working on a game engine for a couple of days now and I've had it rendering a colourful cube and playing sounds in OGG format, but, after refactoring my code-base to make things easier; it ...
-1
votes
1answer
477 views

SDL Access Violation

I've created a SDL game project and this window popped up while trying to compile: First-chance exception at 0x00000000 in SDL_Game.exe: 0xC0000005: Access violation executing location 0x00000000. ...
-4
votes
1answer
297 views

C++ SDL/SFML advancing help [closed]

I've been playing around programming using SDL and SFML for a while now and done all the basic tutorials I can find(love lazyfoo). but I'm stuck and not sure how to move on from simple games like ...
0
votes
2answers
1k views

Is there an alternative to SDL 1.3 for a C++ game that should run on iOS and Android?

I've used SDL for many desktop games, always as the cross-platform glue for: Creating a window Processing input Rendering images Rendering fonts Playing sounds/music It has never disappointed me ...
3
votes
1answer
417 views

Why (SDL) animated filled-circle leaves trail of movement?

I'm trying to achieve proper animation using SDL. Used flags are SDL_HWSURFACE and SDL_DOUBLEBUF. That what I'm getting is technically smooth (I think), but I can figure out what should I do to ...
0
votes
1answer
434 views

SDL_types.h file not found using xcode

Getting this error when trying to use SDL_mixer... SDL_types.h file not found.. I am including all the correct files as far as I can tell and have included the frameworks (both SDL and SDL_mixer) ...
1
vote
1answer
471 views

SDL_Image and typical SDL BMP loading fails completely

been messing with OpenGL and SDL for a pair of weeks. The thing is quite weird. I have been loading a texture from a BMP and using a really easy shader to make it work, and so far it has worked very ...
3
votes
3answers
1k views

Unable to detect continuous keypress event in SDL

I am developing a game using SDL, and am unable to do continuous motion for my object when a key is held down. I'm calling SDL_PollEvent() to retrieve all events during a frame, and passing each ...
1
vote
2answers
958 views

My SDL Game executable cannot run outside codeblocks

After compiling and running SDL programs successfully inside CodeBlocks, when I run them outside CodeBlocks (by clicking .exe file) my program does not run. Instead, it says that libstdc++6.dll is ...
2
votes
1answer
3k views

Is basic SDL hardware accelerated?

I'm going over some SDL tutorials aimed at creating 2D games. However, when I create a basic SDL program - is it hardware accelerated? Or is hardware acceleration only relevant when it comes to 3D ...
0
votes
1answer
300 views

SDL.NET vs SDL C++

I am currently transitioning from XNA to SDL, and was wondering if SDL.NET provides the same benefits as SDL C++. Considering that SDL.NET uses the .NET framework as a wrapper to the SDL base ...
2
votes
1answer
567 views

Bad FPS for smaller size (OpenGL ES with SDL)

If you saw my other question, well, there is still a little problem: Click here to watch on youtube Basically, the frame rate is very bad on the actual device, where for some reason the animation is ...
0
votes
3answers
407 views

Dynamic Sprite Scaling in SDL?

I was wondering if I could get a player sprite effect similar to the one in this video using SDL (without openGL). If not, does anyone know how I might achieve that effect using SDL/OpenGL?
-1
votes
1answer
519 views

2d Game using monotouch? [closed]

I'd like to make a 2d game and I like SDL but I don't think there is an SDL for monotouch. Whats the closest solution?
1
vote
1answer
251 views

SDL deleting an image from the screen?

Well, I'm sort of a beginner to SDL, and I was wondering how one would go about deleting an image from the screen and replacing it with another? I attempted to do this, but it didn't seem to change ...
3
votes
2answers
478 views

How does this background scrolling code work?

I'm glad that this code does exactly what I wanted it to do...But I can't make sense of it although I wrote it from scratch myself. What I wanted to do was create an infinitely scrolling background. ...
3
votes
4answers
7k views

How can I process continuously-held keys with SDL?

I have created a cube in opengl using SDL. Now I am trying to move the camera in X direction if user presses left or right arrow keys and Y direction if user presses up or down arrow keys. Right now ...
1
vote
1answer
657 views

SDL2 focus lost = massive gain in FPS

Whenever I lose focus from my game window, I go from ~60FPS to 6000+, then when the window gains focus again, I go back to around 60 frames per second. And yes, this happens every time I run my game, ...
3
votes
2answers
276 views

Not So Beginner Tutorial Request

So my game is done for now but every time it flashes on the screen and my game loop is awful. So crowded with logic. I need to learn more about games and how they are running. My idea now is that at ...
-2
votes
2answers
2k views

making a game in 2D(C++). SDL or openGL? Or, why not both? [closed]

I'm trying to make a platform game in 2D and I want to know what tool should I use to make it happen. I understand that I can use SDL with openGL. However, if I want to make a solid 2D platform game, ...
1
vote
1answer
233 views

Implementing a Menu System and Buttons (Waiting in a whle loop)

I have a menu system with four screens and six buttons. I have created a button class and it works great. I even have events for the buttons working. The problem is that I have to run the events ...
0
votes
1answer
899 views

Does SFML render it's graphics using OpenGL internally?

By that, I mean that SFML has an abstraction for OpenGL? Sort of like SDL's blit functions, but using OpenGL internally? "Yes SFML uses OpenGL for all the graphical stuff. " Received this comment ...
0
votes
1answer
232 views

Logic For camera Movement

Every time I move the hero on my screen I increment a screenOffsetX and a screenOffsetY. These add 1 if you move right, -1 if left to the sceenOffsetX. Add the screenOffestY +=1 if down, -=1 if up. I ...
0
votes
1answer
180 views

Help Applying SDL_Surface on an array of SDL_Surface?

I'm trying to make a 4x4 blocks (50x50 px) with SDL Surface. Added another block (50x50 px, I wrote the variable as 'flag') that can only move within the 4x4 blocks, so I can select one of the blocks ...
0
votes
2answers
274 views

Map is rendering too slow

I have a basic 20x20 array that stores the map for my game. It either has a 1 or 0 to say a path and a non path. When I draw it on the screen, It seems to take to long to draw one at a time and looks ...
2
votes
3answers
2k views

How can I measure the execution time of some code?

How can I capture how long something takes to complete and log it to the output window (in Visual Studio)? Is there a special library for this? clock_t start, end; double cpuTime; start = clock(); ...
-1
votes
2answers
291 views

My 2D collision code does not work as expected. How do I fix it?

I have a simple 2D game with a tile-based map. I am new to game development, I followed the LazyFoo tutorials on SDL. The tiles are in a bmp file, but each tile inside it corresponds to an internal ...
1
vote
2answers
340 views

How do I cap rendering of tiles in a 2D game with SDL?

I have some boilerplate code working, I basically have a tile based map composed of just 3 colors, and some walls and render with SDL. The tiles are in a bmp file, but each tile inside it corresponds ...
-1
votes
3answers
306 views

SDL_BlitSurface segmentation fault (surfaces aren't null) [closed]

My app is crashing on SDL_BlitSurface() and i can't figure out why. I think it has something to do with my static object. If you read the code you'll why I think so. This happens when the limits of ...
4
votes
1answer
111 views

Key events outside of an SDL application

I'm developing an app under C++ and SDL running in Ubuntu. I'm using the SDL events to handle the keypad buttons. My problem is that my app launch other programs and it should close they with a key ...
3
votes
2answers
2k views

How to hide assets from user? ( e.g.: a png file )

I think the title is quite self-explaining, still this is a big area I think, so let me drop a few words: I've got a simple experiment game project going, and I want to make sure, that the user isn't ...
7
votes
1answer
3k views

SDL2 with OpenGL — weird results, what's wrong?

I'm porting an app to iOS, and therefore need to upgrade it to SDL2 from SDL1.2 (so far I'm testing it as an on OS X desktop app only). However, when running the code with SDL2, I'm getting weird ...
1
vote
3answers
892 views

SDL_image & OpenGL Problem

i've been following tutorials online to load textures using SDL and display them on a opengl quad. but ive been getting weird results that no one else on the internet seems to be getting... so when i ...
0
votes
5answers
878 views

How to implement the light trails for a tron game?

Well I was creating a TRON style game, but had an issue with creating the actual light trails for the game. What I'm doing currently is I have an array the same size as my window in pixel size, ...
2
votes
3answers
813 views

SDL_DisplayFormat works, but not SDL_DisplayFormatAlpha

The following code is intended to display a green square on a black background. It executes, but the green square does not show up. However, if I change SDL_DisplayFormatAlpha to SDL_DisplayFormat ...