sdl-2

I've written a program using C++ and SDL2 which: creates a window gets the window's surface creates a renderer for the window renders some filled rectangles onto the window creates a texture from the window's surface clears the screen renders some filled circles onto the window creates a second texture from the window's surface enters an event loop, where every time a key is pressed: if circles are currently being displayed, SDL_RenderCopy() is used to copy the squares texture to the window. else if squares are currently being displayed, the circles texture is copied to the window. The program

I have been learning about SDL 2D programming for a while and now I wanted to create a program using SDL and OpenGL combined. I set it up like this: SDL_Init(SDL_INIT_VIDEO); window = SDL_CreateWindow("SDL and OpenGL", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, SDL_WINDOW_OPENGL); context = SDL_GL_CreateContext(window); The program is for now just a black window with a white line displayed using OpenGl. Here is the code for the rendering: glClearColor(0, 0, 0, 0); glClear(GL_COLOR_BUFFER_BIT); glBegin(GL_LINES); glVertex2d(1, 0); glVertex2d(-1, 0); glEnd(); SDL_GL

For my game should I use a raw pointer to create SDL_Window , SDL_Renderer , SDL_Texture etc. as they have specific delete functions SDL_DestroyTexture(texture); or should I add a custom deleter when I create a unique_ptr or shared_ptr and if so how would I do this with SDL types? You could create a functor that has several overloaded operator() implementations, each of which call the correct destroy function for the respective argument type. struct sdl_deleter { void operator()(SDL_Window *p) const { SDL_DestroyWindow(p); } void operator()(SDL_Renderer *p) const { SDL_DestroyRenderer(p); }

I am following along with the SDL2.0 tutorials by LazyFoo, using Code::Blocks 13.12. I have had no trouble getting SDL2 linked and running in VS2010 but have changed IDE and come across this error: winapifamily.h: No such file or directory I think everything is linked correctly. I have pointed the program to my SDL2 include and lib directories. Buildlog: (error is occuring in file: ..\include\SDL2\SDL_platform.h) === Build: Debug in SDL2_Setup (compiler: GNU GCC Compiler) === fatal error: winapifamily.h: No such file or directory === Build fails: 1 error(s), 0 warning(s) (0 minute(s), 0 second

I'm starting with SDL2 and having some trouble trying to understand what an SDL_Renderer is. What is it? What does it do? What's the difference between SDL_Renderer, SDL_Window, SDL_Surface and SDL_Texture and how they are related? I had issues with this when trying to understand this introductory code: #include <iostream> #include <SDL2/SDL.h> int main() { /* Starting SDL */ if (SDL_Init(SDL_INIT_EVERYTHING) != 0) { std::cout << "SDL_Init Error: " << SDL_GetError() << std::endl; return 1; } /* Create a Window */ SDL_Window *window = SDL_CreateWindow("Hello World!", 100, 100, 640, 480, SDL

I'm trying to use kivy on my Python 2.7 project (in a PyCharm - Windows 10 environment), but I get the following error. If someone can help me ? Thanks ! PS : I tried many times uninstalling/reinstalling libraries etc and doing what suggested on posts like this one, but it doesn't work : Kivy not working (Error: Unable to find any valuable Window provider.) [INFO ] [Logger ] Record log in C:\Users\cyril\.kivy\logs\kivy_18-03-25_0.txt C:\Users\cyril\venv\lib\site-packages\kivy\modules\__init__.py:128: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode -

I've cobbled together a very basic game loop in C++ using SDL2, and I've noticed that every few seconds, SDL_PollEvent seems to be unusually slow, even when nothing is happening. I sent my deltaTime to console every loop, and its about 100ms difference on the cycles that SDL_PollEvent is lagging. I've already confirmed that it's something with this function by moving my timers around, but I'm not sure where to diagnose the issue further. My loop: while (!quit) { uint32_t startTime = SDL_GetTicks(); while (SDL_PollEvent(&e) != 0) { std::cout << "Event: "<< e.type << std::endl; // Added later,

Can anyone explain to me in simple words what is the difference between texture and surface? I saw it used in SDL2 as SDL_Surface and SDL_Texture . SDL_Texture is created from SDL_Surface which in turn is created from image/bitmap. Both are collection of pixels. But I do not see the main difference between them (has to do something with GPU?) I tried to google it but all explanations I found were too complex to understand them without digging deeper into computer graphics stuff. Petr Abdulin Basically your assumption "has to do something with GPU?" is right. SDL_Surface is used in software