因此,我试图用SDL库显示一个简单的图像,但是当我使用函数SDL_BlitSurface()时,什么都没有发生,而我得到的只是一个黑屏。我还要注意,我的.bmp文件,源文件和可执行文件都在同一目录中。

//SDL Header
#include "SDL/SDL.h"

int main(int argc, char* args[])
{
    //Starts SDL
    SDL_Init(SDL_INIT_EVERYTHING);

    //SDL Surfaces are images that are going to be displayed.
    SDL_Surface* Hello = NULL;
    SDL_Surface* Screen = NULL;

    //Sets the size of the window (Length, Height, Color(bits), Sets the Surface in Software Memory)
    Screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE);
    //Loads a .bmp image
    Hello = SDL_LoadBMP("Hello.bmp");
    //Applies the loaded image to the screen
    SDL_BlitSurface(Hello, NULL, Screen, NULL);
    //Update Screen
    SDL_Flip(Screen);
    //Pause
    SDL_Delay(2000);
    //Deletes the loaded image from memory
    SDL_FreeSurface(Hello);
    //Quits SDL
    SDL_Quit();

    return 0;
}

最佳答案

LoadBMP()是废话。安装SDL_image库

sudo apt-get install SDL_image SDL_image_dev

(不确定软件包的名称。只需使用aptitude或synaptic或其他方法即可找到它们)

并包括
#include "SDL_image.h"

您加载图像然后
SDL_Surface* Hello = IMG_Load("Hello.bmp");
if (!Hello){
    printf("Ooops, something went wrong: %s\n", IMG_GetError());
    exit(0);
}

重要提示:请注意,您应始终进行错误检查并打印出错误。
if (!Hello)if (Hello == NULL)相同

09-10 04:48
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