SDL2 window 尺寸大于应有的尺寸

Question

我正在尝试创建 window，比方说 400x400:

SDL_Init(SDL_INIT_VIDEO);
Uint32 mode = SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE;
SDL_Window* window;
SDL_Renderer* renderer;
if (SDL_CreateWindowAndRenderer(400, 400, mode, &window, &renderer))
    return 2;
if (!window || !renderer)
    return 2;
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
SDL_Event event;
int quit = 0;
while (!quit)
{
    while (SDL_PollEvent(&event))
    {
        if (event.type == SDL_QUIT)
            quit = 1;
    }
}
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();

我看到 window 充满了黑色像素。然而，window 的大小是 500x500 无边框，而 502x540 有边框，但为什么呢？

Answer 1

在 Windows 上，当您使用高 DPI 显示器时，OS 可能会拉伸您的 window。您可以使用以下方式禁用此拉伸：

SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "1")

SDL2 window 尺寸大于应有的尺寸

SDL2 window size is bigger than it should be

c

size

sdl

window

sdl-2