sdl-2

I have this line of code //std::unique_ptr<SDL_Window> _window_; // this is somewhere else... _window_ = std::make_unique<SDL_Window>(SDL_CreateWindow("SDL Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, _WIDTH_, _HEIGHT_, SDL_WINDOW_SHOWN)); it produces the following compiler error In file included from /usr/include/c++/6/memory:81:0, from /home/user/prj/src/main.cpp:4: /usr/include/c++/6/bits/unique_ptr.h: In instantiation of ‘typename std::_MakeUniq<_Tp>::__single_object std::make_unique(_Args&& ...) [with _Tp = SDL_Window; _Args = {SDL_Window*}; typename std::_MakeUniq<_Tp>::_

EDIT: updated with some new info (Bold'ed). Also, the code and Valgrinds output is updated. I recently started using SDL2 as my graphics library. After developing some stuff, I decided to run Valgrind and found out that I am leaking memory... a lot of memory. After narrowing it down I compiled this code (In C) : #include <SDL2/SDL.h> int main(int argc, char** argv) { SDL_Init(SDL_INIT_EVERYTHING); SDL_QuitSubSystem(SDL_INIT_EVERYTHING); SDL_Quit(); return 0; } This is the make file: CC = gcc CCFLAGS = -Wall -o0 LDFLAGS = -lSDL2 SOURCES= main.c OBJECTS=$(SOURCES:.c=.o) EXE = Test .PHONY: all: $

I'm trying to draw a rectangle outline in SDL 2.0 in order to use as a selection box. Does anyone know how to make one in SDL 2.0? You are looking for the SDL_RenderDrawRect : int SDL_RenderDrawRect(SDL_Renderer* renderer, const SDL_Rect* rect); Typical usage would be: SDL_Rect rectToDraw = {100,100,100,100} // Just some random rect //Set Color of Rect with SDL_SetRenderDrawColor if needed SDL_RenderDrawRect(renderer, &rectToDraw); To draw a filled rect it would then be with SDL_RenderFillRect 来源： https://stackoverflow.com/questions/20072639/how-to-draw-a-rectangle-outline-in-sdl-2-0

I am creating an application using SDL2 & OpenGL, and it worked fine on 3 different computers. But on another computer (an updated arch linux), it doesn't, and it crashes with this error: OpenGL context already created So my question is: How do I check if the OpenGL context has already been created? And then, if it is already created, how do I get a handle for it? If I can't do this, how do I bypass this issue? SDL2 does not in fact create an OpenGL context without you asking to make one. However, if you ask it to create an OpenGL context when OpenGL doesn't work at all, SDL2 likes to, erm ,

Whenever I try to load a PNG using SDL_Image's IMG_Load function it gives the error Failed loading libpng16-16.dll: . I have all the right dll's in the right path and I can use other parts of SDL_Image, but for some reason it can't load the libpng dll. How can I fix this? Any help is appreciated. See my article " SDL2: Loading Images with SDL_image ": If you're going to run from Visual Studio, make sure the image is in the same folder as your main.cpp file; otherwise if you're running straight from the executable, the image should be in the same folder with it. Needless to say, what I wrote

There used to be a function named SDL_EnableKeyRepeat() in SDL, but not anymore in SDL2. I searched around in SDL2-wiki but failed to locate anything relevant. Any ideas? When handling a keyboard event, just filter out any events that are repeat events, i.e. check the repeat field of the SDL_KeyboardEvent of the SDL_Event union. For example: SDL_Event event; while (SDL_PollEvent(&event)) { if (event.type == SDL_QUIT) { quit = true; } if (event.type == SDL_KEYDOWN && event.key.repeat == 0) { if (event.key.keysym.sym == SDLK_d) debug = debug ? false : true; // ... handle other keys } } See https

SDL_RenderCopy only accepts a single input rectangle and a single output rectangle. But if I have a lot of images that I want to be filled, my knowledge of opengl tells me that a bulk operation that draws all images at once can be much faster than one draw call per sprite. SDL_FillRects is already there with a count parameter. But I cant find anything suitable for drawing a lot of sprites. Is there some function in SDL2 that I am still missing, because I doubt that this optimization can be done automatically. 来源： https://stackoverflow.com/questions/20400544/sdl-rendercopy-with-an-array-of