SDL 将窗口另存为 BMP [英] SDL Saving window as BMP

问题描述

我正在用 SDL 和 C 编写程序，我希望能够将窗口保存为图像.

I am writing a program in SDL and C and I want to be able to save the window as an image.

这是我的代码:

screen = SDL_GetWindowSurface(win);
SDL_SaveBMP(screen,"screen");

但是当我执行它时，我得到:

But when I execute it I get:

Segmentation Fault

我从其他来源收集到关于指针和内存访问的信息.有什么帮助吗?

From other sources I gather that its about pointers and memory access. Any help?

推荐答案

在窗口表面调用 SDL_LockSurface在保存位图之前，然后是 SDL_UnlockSurface.

Call SDL_LockSurface on a window surface before saving bitmap, and SDL_UnlockSurface after that.

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