Questions tagged [sdl2]
SDL2 (Simple DirectMedia Layer 2) is designed to provide platform independent access to various common multimedia devices. It is the new, current and updated version of SDL and recommended for new projects over legacy SDL1.2
374 questions
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how to implement event system with SDL2?
I'm writing a C++ game engine using SDL2 and I have an SDL event loop, but I'm not really sure what I want to do with these events. I know that I'll have systems that will be interested in these ...
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Problem with SDL2 optimization (tree structure)
while I was trying to optimize SDL2 rendering phase as much as possible, I reached a wall. I tried to search on the internet but I could not find any solution. So, I need help.
Let me explain the ...
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How can I accurately calculate deltatime in SDL2/3?
I have looked up ways to calculate DeltaTime in the past, but the 'solutions' seem to have my program be slightly jittery or not move things correctly. As far as I know, you would calculate it by ...
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Resolution-independent rendering of crisp 2D graphics (non-pixel-art)
I’m a beginner developing a 2D game in SDL2 using C with a visual style that uses crisp high resolution graphics (like geometry dash and Hollow Knight -- not pixel art). I want the game to scale ...
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Linked list in C
I only know C, no other language.
How do I use a linked list to store projectiles in sdl2?
My bullet currently has an sdl_image, has been queried and has the following properties:
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Collision detection for a newbie [duplicate]
I am a freshman cs major with an interest in game dev. I know next to nothing and am very new to this so please bare with me.
TLDR; Should I use BSP for detection between moving and static objects as ...
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Fixing the player movement with SDL2
Whenever I create a project with SDL2, I always encounter the same issue: when I hold down a key (for example, W for upward movement), it moves on the first frame, doesn’t move on the second frame, ...
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Trouble with Transparent Pixel Blending in PNG
When drawing transparent PNG data on to the renderer, pixel data of any previous drawing (layer beneath) is replaced with the renderer's drawing color (green).
I have tried setting blend mode in the ...
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Invalid Pixel Offset Calculation Fix?
I am currently using a SDL_Texture *texture as a chunk in my world that is being Perlin noised onto to make terrain.
Using a 2d array of these I tile the plane. But ...
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Is there more efficient method of terrain rendering in 2D plane than redrawing millions of SDL_FRect each frame
I want to render terrain efficently using perlin nosie and a lots of rects. Should I use rects or is there another way. Following is my implementation.
I use rect size = 1 which is not really ...
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SDL hello-world program on ArkOS runs without error, but shows no output
I recently bought a R36S retro handheld linux based game console. The system runs ArkOS which is a Ubuntu based OS. On boot, the system launches the program EmulatorStation, but it is possible to exit ...
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How to get X and Y pixels of a Image in SDL2?
I am trying to create a Voxel Space Engine In SDL2 C++. However the tutorial I am following reads the X and Y pixels of the heightmap image. I can't find a way to do this.
I am following this tutorial:...
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SDL2 oversized pixels
I pulled my SDL2 game out of cold storage and am working to get it running again. I found a curious thing: graphics primitives based on SDL2_gfx and text based on SDL_ttf are displaying way too big, ...
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How to render a texture in a unique color using SDL2?
(I apologize in advance for my awful English)
I'm writing a personal UI library in C++ using SDL2, and when came the moment to implement icons, I struggled to find how to render them in a unique color....
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Reading steering wheel events has 180 degree dead zone. How to remove/reduce dead zone?
I'm making a GUI that can be controlled by a steering wheel. It need only run on Windows.
It works as expected with exception of the fact that the first 90 degrees in either direction seems to be ...
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Regarding with pixel arrays and textures in SDL2
Currently, the way I render my frames is as follows. I have two arrays of pixels (in SDL_PIXELFORMAT_ABGR8888) called ...
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Use DirectX 11 & HLSL in SDL
I saw Lazy Foo using OpenGL & GLSL in SDL, but I want to use DirectX 11 & HLSL in SDL.
Is there a way to do this, and how?
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How to stop scenes from running before switching between them?
So, I've been working on a game dev library using C++ and SDL2 (to test the library out I'm making a Pong clone). And now I'm writing a Scene Manager which is going good, I can switch between scenes ...
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SDL2 Events how to avoid monolithic control statement?
I'm using SDL2 in my game engine and I'm trying to figure out how I can prevent having a monolithic control statement like this:
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How to deploy SDL2 game on Steam/Windows — what do I do with the dll?
I'm currently developing a game on Windows using the MSYS2 environment and mingw64. I've successfully installed SDL2 using the msys package manager (pacman) and using CMake, was able to get it up and ...
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non-class type error with SDL_Rect
I am building a pong game in SDL2 as my first assignment for my game development class. I've encountered an error involving SDL_Rect that I can't figure out. I am ...
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How to setup a loading screen using SDL_Threads?
I am trying to set up a basic toy example of how a loading screen would work in SDL. Here is my code below.
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Simulated light for a 2D tile-map with just SDL2?
I'm working on a 2D tile-map RPG with C++17 and SDL2 + SDL_Image.
There are daily cycles, weekly cycles and seasons. Even a kind of weather engine provides atmosphere. The moods and times of day are ...
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What is the best way to implement a scene manager?
I'm trying to create a scene manager system for a small framework I'm writing on top of SDL2. I have implemented a scene management system that works, but I am not sure if it is structured how it ...
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How to render a portion of a texture (upscaled) without affecting the border with SDL2?
I noticed that render a portion of the texture, upscaling it, it affects is border values with the proximity of the outside remaining parts of the texture (when not using Neareast neighbour ...
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Selecting tiles with mouse on isometric map with height and slopes
I want to implement an isometric map with rectangular tiles similar to how it was in simcity 2000, where tiles could have different heights and tiles with different heights were connected by slopes. ...
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why One big texture frames is consuming more RAM compared to be divided into single frame ones [closed]
I noticed that composing frames in a big texture will consume more RAM rather than having 1 frame per texture (or sprite if you would like).
The renderer is SDL2 backed by Direct3D.
Is there any ...
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Would it be practical if I used composition for everything?
I've been learning C++ and SDL2 and I'm trying to improve at using composition and for the longest time I thought it was only useful for making things like players, enemies, coins, etc, and I think ...
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How to use SDL_RenderSetLogicalSize() properly in SDL2?
I want to handle different resolutions without altering any game objects. I tried using SDL_RenderSetLogicalSize() but I don't know how to implement it properly. ...
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How to copy the Renderer Present screen result into a surface or texture?
Is it possible to copy into a SDL_Surface what is displayed in the screen from a SDL_RendererPresent?
using ...
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How to install game with dependencies on Linux?
I am creating a game using C and some libraries. I wish to not require my users to download anything but the game as most games are self contained. What is the usual process for compiling and ...
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Rendering Infinite 2D chunks?
I'm working on a top-down 2D RTS with C++ and SDL2, and have implemented the biome/terrain generation, tile rendering and a rudimentary camera system. I already have the skeleton code in place that ...
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glClearColor prevents text from rendering with freetype using SDL2
I'm trying to add text rendering to my rendering project and am following the OpenGL tutorial at https://learnopengl.com/In-Practice/Text-Rendering I'm using SDL2 as my backend so had to make some ...
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rotating a sprite with mouse cursor
i am learning how to make a 2d game using sdl and c++ and am currently trying to rotate the sprite so that is always facing the cursor, my game is set up with an entity component system, i have a ...
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Frame duration varies by a millisecond every few frames
When I run the program at 60 fps, I get 0.016 seconds per frame most of the time, then 0.017 s once every few frames. A similar thing happens for 30 fps, varying between 0.033 and 0.034 seconds per ...
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Why might performance of a Rust-sdl2 project be better while profiling?
I'm making a simple SDL2-based Rust game, on an OSX laptop. Graphics mostly involves drawing lots of colored squares to the screen. Performance is really slow for what I'm doing, so I decided to ...
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SDL2 Not destroying textures properly when updating text
Im implementing a series of textboxes in sdl2 ,however my program is not working correctly
-sdl is not destroying textures when the destroytexture function is callled resulting in a weird overlap of ...
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How to handle UI when logical and screen sizes are different?
I am programming a game in SDL2 and I am looking for advice on how to handle interactivity of UI components when the screen resolution and logical resolutions are different. Up to now I have been ...
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How to capture consecutive key strokes for different input modes
I'm making an Ultima spinoff which requires a lot of key strokes for actions. For example the arrow keys are for movement BUT once the player presses down the 'T' (talk) key the arrow keys are used ...
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Garbled text and music - due to Steam Linux runtime change?
My team and I released our game on Steam last year for Windows, Mac, and Linux. The game is written in C++ and uses SDL2, including SDL2_image, SDL2_ttf, and OpenGL for graphics. Around the middle of ...
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Key presses and game quit sometimes delayed by seconds
U'm currently trying to develop a 2D RPG similar to early Final Fantasy titles for the NES.
Up until now I've been reading C++ tutorials on SDL2 and doing my best to convert the concepts into OCaml. ...
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Odd SDL VSYNC behaviour when monitor is set to 50 Hz
I am observing strange behaviour with VSync in SDL. I have this code:
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SDL2 - Camera only scrolls in x direction, but not y direction
I'm following along with the LazyFoo tutorial to create the basis for a simple arcade space shooter. I'm trying to get the sprite moving through the map while being tracked by the camera. The code I ...
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how do I chage pixel color? (SDL2)
After a long time away, I'm coming back to SDL, using version SDL2.
I have some example code that does pretty much exactly what I want it to do, but I want to change the pixel color. Ive tried ...
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Movement diagonally is not consistent
I am making my own game and this is the first time i'm doing so. so I hope you can forgive stupid mistakes. Im making this in C++ and using the SDL2 framework.
Currently, I have a character on my ...
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SDL2 and TmxLite (Tiled) (Reading the actual TILE data from the layer)
I am trying to make use of the Tiled Map Editor for my SDL2 projects. (By using the TMXLITE parser from Fallahn on Github) https://github.com/fallahn/tmxlite
...
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Memory usage of simple SDL2 program grows linearly
I am a newbie in SDL2 and I was testing an example code of Lazy Foo SDL tutorial just out of curiosity. The program renders an image named x.bmp living in the same folder as the program. Here’s the ...
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SDL_BlitSurface() 'dstrect' - Not working as I expected
I am new to SDL but have used C++ a fair bit over the years. I'm struggling with displaying sprites with a scale. EG. Here I am trying to draw a grid of squares (ie. Tetris) but the source BMP is ...
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How can I determine which 2d entity was selected from a overlapping pile
I'm using C++ and SDL2 to learn about coding by creating a clone of a 2d tile-based game I enjoy.
To setup my problem; There can be multiple items dropped on a tile by the player or other entities ...
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OpenGL Multisampling doesn't work
I am trying to get the Antialiasing (multisampling) in OpenGL with SDL to work(as shown here), but the result doesn't change and I still get jaggy edges.
Before rendering I call the following ...
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