此 SDL 程序工作正常(显示一个窗口并在其上绘制位图),但是,如果我在程序中声明任何变量(例如 int、long 等),窗口将冻结并且是白色而不是黑色,并且什么也没有绘制. 什么可能导致这种情况?
#include <stdio.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
int main(int argc, char* argv[]) {
// line below will cause SDL crash
// int blabla = 640;
SDL_Window *window;
SDL_Init(SDL_INIT_VIDEO);
window = SDL_CreateWindow(
"A rather exceptional SDL window",
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
640,
480,
SDL_WINDOW_OPENGL
);
if (window == NULL) {
printf("Could not create window: %s\n", SDL_GetError());
return 1;
}
SDL_Renderer *renderer;
SDL_Texture *texture;
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
SDL_Surface *brush;
brush = IMG_Load("brush2.png");
texture = SDL_CreateTextureFromSurface(renderer, brush);
SDL_RenderClear(renderer);
SDL_Rect *sRect, *dRect;
sRect->w = 10;
sRect->h = 4;
sRect->x = 0;
sRect->y = 0;
dRect->w = 10;
dRect->h = 4;
dRect->x = 10;
dRect->y = 10;
SDL_RenderCopy(renderer, texture, sRect, dRect);
SDL_RenderPresent(renderer);
SDL_Delay(1000);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}