SDL2_ttf错误:没有找到入口点
SDL2_ttf error: Entry point not found
所以,当尝试将sdl_ttf添加到我的游戏项目时,一个奇怪的错误弹出:https://i.stack.imgur.com/DkjH5.png
之前一切正常,当我添加TTF_Init()时问题开始了…
这些是我的项目中的文件:
main.cpp:
#include <sdl.h>
#include <sdl_image.h>
#include <sdl_ttf.h>
#include <stdio.h>
#include "CEngine.h"
int main(int argc, char *argv[]){
CEngine Engine;
//Start up SDL and create window
if(!Engine.OnInit())
{
printf("Failed to initialize!n");
}
//Loading in the gfx
SDL_Surface* Surf_Player = Engine.LoadSurface("./gfx/player.png");
SDL_Surface* Surf_Tile_Grass = Engine.LoadSurface("./tilesets/grass.png");
SDL_Surface* Surf_Tile_Stone = Engine.LoadSurface("./tilesets/stone.png");
bool Running = true;
//Player Location
int PlayerX = 64;
int PlayerY = 64;
//Map
char Map[16][21]={"####################",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"# #",
"####################",};
//Event handler
SDL_Event e;
//Main game loop
while(Running){
//Handle the events
while(SDL_PollEvent(&e)){
if(e.type==SDL_QUIT){
Running = false;
}
//User presses a key
else if(e.type == SDL_KEYDOWN){
//Check which key was pressed
switch(e.key.keysym.sym){
case SDLK_x:
Running = false;
break;
case SDLK_a:
if(Map[(PlayerX/Engine.TILE_SIZE)-1][PlayerY/Engine.TILE_SIZE]!='#'){
PlayerX-=32;
}
break;
case SDLK_d:
if(Map[(PlayerX/Engine.TILE_SIZE)+1][PlayerY/Engine.TILE_SIZE]!='#'){
PlayerX+=32;
}
break;
case SDLK_w:
if(Map[PlayerX/Engine.TILE_SIZE][(PlayerY/Engine.TILE_SIZE)-1]!='#'){
PlayerY-=32;
}
break;
case SDLK_s:
if(Map[PlayerX/Engine.TILE_SIZE][(PlayerY/Engine.TILE_SIZE)+1]!='#'){
PlayerY+=32;
}
break;
case SDLK_F1:
PlayerX = 64;
PlayerY = 64;
break;
}
}
}
//Apply the image
for(int y = 0; y < (Engine.SCREEN_HEIGHT/Engine.TILE_SIZE); y++){
for(int x = 0; x <= ((Engine.SCREEN_WIDTH/Engine.TILE_SIZE)-1); x++){
SDL_Rect Rect_Temp;
Rect_Temp.x=x*Engine.TILE_SIZE;
Rect_Temp.y=y*Engine.TILE_SIZE;
if(Map[y][x] == ' '){
SDL_BlitSurface(Surf_Tile_Grass, NULL, Engine.Surf_Screen, &Rect_Temp);
}
else if(Map[y][x] == '#'){
SDL_BlitSurface(Surf_Tile_Stone, NULL, Engine.Surf_Screen, &Rect_Temp);
}
}
}
SDL_Rect Rect_Temp;
Rect_Temp.x = PlayerX;
Rect_Temp.y = PlayerY;
SDL_BlitSurface(Surf_Player, NULL, Engine.Surf_Screen, &Rect_Temp);
//Update the surface
SDL_UpdateWindowSurface(Engine.Window);
}
//Free resources and close SDL
Engine.OnExit();
return 0;
}
CEngine.h:
#ifndef CENGINE_H
#define CENGINE_H
#include <SDL.h>
#include <SDL_Image.h>
#include <SDL_TTF.h>
#include <string>
#include <stdio.h>
class CEngine
{
public:
CEngine();
bool OnInit();
void OnExit();
SDL_Surface* LoadSurface(std::string path);
SDL_Window* Window;
SDL_Surface* Surf_Screen;
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const char* WINDOW_TITLE = "Game";
const char TILE_SIZE = 32;
};
#endif // CENGINE_H
CEngine.cpp:
#include "CEngine.h"
CEngine::CEngine(){
//The window where surfaces will be rendered to
Window = NULL;
//The surface contained by the window
Surf_Screen = NULL;
}
bool CEngine::OnInit(){
//Initialize SDL
if(SDL_Init(SDL_INIT_VIDEO) < 0)
{
printf("SDL could not initialize! SDL_Error: %sn", SDL_GetError());
return false;
}
//Create a window
Window = SDL_CreateWindow("Game", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
if(Window == NULL){
printf("Window could not be created! SDL_Error: %sn", SDL_GetError());
return false;
}
//Initialize PNG loading
int imgFlags = IMG_INIT_PNG;
if(!(IMG_Init(imgFlags) & imgFlags)){
printf("SDL_image could not initialize. SDL_image Error: %sn", IMG_GetError());
return false;
}
//Initilize SDL_TTF
if(TTF_Init() == -1){
printf("SDL_TTF could not initilize! SDL_TTF Error: %s", TTF_GetError());
return false;
}
//Get window surface
Surf_Screen = SDL_GetWindowSurface(Window);
return true;
}
void CEngine::OnExit(){
//Destroy window
SDL_DestroyWindow(Window);
Window = NULL;
//Cleans up the sdl_image subsystems(?)
IMG_Quit();
//Cleans up all initilized subsystems
SDL_Quit();
}
SDL_Surface* CEngine::LoadSurface(std::string path){
//Optimized image
SDL_Surface* Surf_Optimized = NULL;
//Load the image
SDL_Surface* Surf_Loaded = IMG_Load(path.c_str());
if(Surf_Loaded == NULL)
{
printf("Unable to load image %s. SDL Error: %s.n", path.c_str(), IMG_GetError());
return NULL;
}
//Converting the loaded surface to screen format
Surf_Optimized = SDL_ConvertSurface(Surf_Loaded, Surf_Screen->format, 0);
if(Surf_Optimized == NULL){
printf("Unable to optimize image %s. SDL Error: %s.", path.c_str(), SDL_GetError());
}
//Get rid of the unoptimized version
SDL_FreeSurface(Surf_Loaded);
//Return the surface
return Surf_Optimized;
}
这些是我的链接器设置:https://i.stack.imgur.com/yEjg6.png
并且它是使用mingw 4.7编译的(更新:尝试使用4.8,出现相同的错误)
提前感谢。(如果我问了一个愚蠢的问题,我很抱歉,但我在任何地方都找不到答案。)
这是一个运行时错误,而不是链接时间错误。看起来在你的构建文件夹(你的可执行文件所在的地方)没有libfreetype-6.dll
,或者如果有,它是损坏的,你需要一个工作。只要确保您的libfreetype-6.dll
和zlib.dll
是正确的,并且工作版本与mingw-4.7兼容
编辑
在我的经验中,让事情在mingw上工作的唯一万无一失的方法是确保每个dll都是用相同版本的mingw构建的。
自从我切换到Nuwen发行版(http://nuwen.net/mingw.html)并开始手动构建所有依赖项以来,我没有遇到过dll不兼容问题。
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