Question

所以我正在关注this教程，一切都顺利，花花公子，直到遇到问题，即我无法加载.bmp。

#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <stdio.h>
#include <iostream>
#include <SDL2/SDL_main.h>

using namespace std;



int main(int argc, char* argv[]) {

bool quit = false;

SDL_Init(SDL_INIT_VIDEO);

SDL_Window* window;

window = SDL_CreateWindow("window", 100, 100, 1280, 720, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);

if(window == NULL){

    cout << "Disn't work, here is why: " << SDL_GetError()<< endl;
    return 0;
}


SDL_Renderer* renderer = NULL;

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

SDL_Event* mainEvent = new SDL_Event();

SDL_Texture* grass_image = NULL;
grass_image = IMG_LoadTexture(renderer, "grass.bmp");

SDL_Rect grass_rect;
grass_rect.x = 10;
grass_rect.y = 50;
grass_rect.w = 250;
grass_rect.h = 250;

while(!quit && mainEvent->type != SDL_QUIT){
    SDL_PollEvent(mainEvent);
    SDL_RenderClear(renderer);

    SDL_RenderCopy(renderer, grass_image, NULL, &grass_rect);

    SDL_RenderPresent(renderer);

}

SDL_DestroyWindow(window);
SDL_DestroyRenderer(renderer);
delete mainEvent;

return 0;
}

当我尝试编译代码时（在Code :: Blocks中）它给出了错误

对＆＃34; IMG_LoadTexture＆＃34;
的未定义引用

好吧，我尝试将IMG_LoadTexture(renderer, "grass.bmp");更改为IMG_LoadTexture(renderer, "/the/full/path/of/grass.bmp");，但这也无效。同样的错误。我写错了什么，或错过了某些部分？另外，grass.bmp与main.cpp在同一个文件夹中（上面的代码）。

Answer 1

此处的错误表示您已声明了一个函数但未定义它 - undefined reference。

很可能是因为您忘记链接到IMG_LoadTexture所属的函数库SDL_image。

无法加载.bmp SDL2 IMG_LoadTexture

1 个答案: