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SDL Wiki

SDL_CreateRenderer

Create a 2D rendering context for a window.

Syntax

SDL_Renderer * SDL_CreateRenderer(SDL_Window * window,
                       int index, Uint32 flags);

Function Parameters

window

the window where rendering is displayed

index

the index of the rendering driver to initialize, or -1 to initialize the first one supporting the requested flags

flags

0, or one or more SDL_RendererFlags OR'd together

Return Value

Returns a valid rendering context or NULL if there was an error; call SDL_GetError() for more information.

Code Examples

#include "SDL.h"

int main(int argc, char *argv[])
{
    SDL_Window *win = NULL;
    SDL_Renderer *renderer = NULL;
    SDL_Texture *bitmapTex = NULL;
    SDL_Surface *bitmapSurface = NULL;
    int posX = 100, posY = 100, width = 320, height = 240;
    SDL_bool loopShouldStop = SDL_FALSE;

    SDL_Init(SDL_INIT_VIDEO);

    win = SDL_CreateWindow("Hello World", posX, posY, width, height, 0);

    renderer = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED);

    bitmapSurface = SDL_LoadBMP("img/hello.bmp");
    bitmapTex = SDL_CreateTextureFromSurface(renderer, bitmapSurface);
    SDL_FreeSurface(bitmapSurface);

    while (!loopShouldStop)
    {
        SDL_Event event;
        while (SDL_PollEvent(&event))
        {
            switch (event.type)
            {
                case SDL_QUIT:
                    loopShouldStop = SDL_TRUE;
                    break;
            }
        }

        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, bitmapTex, NULL, NULL);
        SDL_RenderPresent(renderer);
    }

    SDL_DestroyTexture(bitmapTex);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(win);

    SDL_Quit();

    return 0;
}
SDL_CreateSoftwareRenderer
SDL_DestroyRenderer
SDL_GetNumRenderDrivers
SDL_GetRendererInfo

CategoryAPI, CategoryRender


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