我想从文件中加载图像,而不使用整个文件路径。就像在C#中一样,但是当我们尝试加载图像时,只是在控制台中引发我的sdl错误。从文件sdl_loadbmp不使用整个文件路径
bool loadMedia()
{
//Loading success flag
bool success = true;
//Load splash image
gHelloWorld = SDL_LoadBMP("SDL2_tutorials02/hello_world.bmp");
if(gHelloWorld == NULL)
{
printf("Unable to load image %s! SDL Error: %s\n", "SDL2_tutorials02/hello_world.bmp", SDL_GetError());
success = false;
}
return success;
}
这是我的,我从一个在线教程中学原代码的一部分,试图教自己SDL和更多关于C++
编辑为InternetAussie,这是什么,我认为我在我的整个源代码从教程中学低于:
//Using SDL and standard IO
#include <SDL.h>
#include <stdio.h>
//Screen dimension constants
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
//Starts up SDL and creates window
bool init();
//Loads media
bool loadMedia();
//Frees media and shuts down SDL
void close();
//The window we'll be rendering to
SDL_Window* gWindow = NULL;
//The surface contained by the window
SDL_Surface* gScreenSurface = NULL;
//The image we will load and show on the screen
SDL_Surface* gHelloWorld = NULL;
bool init()
{
//Initialization flag
bool success = true;
//Initialize SDL
if(SDL_Init(SDL_INIT_VIDEO) < 0)
{
printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
success = false;
}
else
{
//Create window
gWindow = SDL_CreateWindow("SDL Tutorial", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
if(gWindow == NULL)
{
printf("Window could not be created! SDL_Error: %s\n", SDL_GetError());
success = false;
}
else
{
//Get window surface
gScreenSurface = SDL_GetWindowSurface(gWindow);
}
}
return success;
}
bool loadMedia()
{
//Loading success flag
bool success = true;
//Load splash image
gHelloWorld = SDL_LoadBMP("SDL2_tutorials02/hello_world.bmp");
if(gHelloWorld == NULL)
{
printf("Unable to load image %s! SDL Error: %s\n", "SDL2_tutorials02/hello_world.bmp", SDL_GetError());
success = false;
}
return success;
}
void close()
{
//Deallocate surface
SDL_FreeSurface(gHelloWorld);
gHelloWorld = NULL;
//Destroy window
SDL_DestroyWindow(gWindow);
gWindow = NULL;
//Quit SDL subsystems
SDL_Quit();
}
int main(int argc, char* args[])
{
//Start up SDL and create window
if(!init())
{
printf("Failed to initialize!\n");
}
else
{
//Load media
if(!loadMedia())
{
printf("Failed to load media!\n");
}
else
{
//Apply the image
SDL_BlitSurface(gHelloWorld, NULL, gScreenSurface, NULL);
//Update the surface
SDL_UpdateWindowSurface(gWindow);
//Wait two seconds
SDL_Delay(2000);
}
}
//system halt for testing
system("pause");
//Free resources and close SDL
close();
return 0;
}
,如果它可以帮助我跟着在懒惰富”制作教程1中的说明。我希望我已经适当添加的超链接仅仅是点击如何在使用visual studio 2010 ultimate的windows计算机上设置sdl的步骤之后的设置部分。我使用控制台将系统32安装程序作为错误输出源。
你是如何运行可执行文件的?如果您自己运行它,则通常会从包含的目录中获取相对路径。否则,工作目录可能是任何东西。 – InternetAussie
通常阅读'getcwd()'和'chdir()'和相对路径。 –
看看是否有效:构建可执行文件;将SDL2_tutorials02'目录放置在与可执行文件相同的目录中;并双击Explorer中的可执行文件,而不是从IDE(它改变工作目录)运行它。希望有帮助。 – InternetAussie