我正在游戏中创建一个菜单（当我按下键盘上的逃逸键时可用）
但是用SDL_Rect创建的黑色背景和文本没有显示，我也不明白为什么。
当我运行程序时，可以通过按箭头（上，下，左，右）来更改背景图像，当我按下esc时，我什么也要做不了，直到我再次按下esc，然后我可以继续使用键盘上的箭头更改背景颜色。
有人可以帮我吗？
#include <SDL.h>
#include <stdio.h>
#include <stdlib.h>
#include <SDL_image.h>
#include <SDL2/SDL_ttf.h>
#define CHOICEMENU 2
void errorMessage(const char *message);
void errorMessageImg(const char *message);
void errorMessageTtf(const char *message);
int printTextTtf(SDL_Surface* window, TTF_Font* mainFont, const char* text);
int displayMenu(SDL_Surface* window, TTF_Font* font);
int main( int argc, char **argv)
{
//Pointeurs de la SDL :
SDL_Window *window = NULL;
SDL_Surface *windowSurface = NULL;
SDL_Surface *image1,*image2, *image3, *image4 = NULL;
SDL_Surface *currentImage = NULL;
SDL_Surface *icon = NULL;
SDL_Renderer *renderer = NULL;
int menu;
int running;
TTF_Init(); //initialisation des textes
TTF_Font *mainFont = NULL;
mainFont = TTF_OpenFont("couriernew.ttf",30);
icon = IMG_Load("img/flask.png");
SDL_SetWindowIcon(window,icon);
if(SDL_Init(SDL_INIT_VIDEO) != 0){ //retourne 0 si Ok
errorMessage("Erreur lors de la creation de la fenêtre et du rendu");
}
window = SDL_CreateWindow("Jeu Antoine et Robin", SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_SHOWN);
windowSurface = SDL_GetWindowSurface(window);
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED |
SDL_RENDERER_PRESENTVSYNC);
//texture = SDL_LoadBMP("ici.bmp");
image1 = SDL_LoadBMP("img/image1.bmp");
if(image1 == NULL){
SDL_DestroyWindow(window);
errorMessage("Impossible de charger l'image 1");
}
image2 = SDL_LoadBMP("img/image2.bmp");
if(image2 == NULL){
SDL_DestroyWindow(window);
errorMessage("Impossible de charger l'image 2");
}
image3 = SDL_LoadBMP("img/image3.bmp");
if(image3 == NULL){
SDL_DestroyWindow(window);
errorMessage("Impossible de charger l'image 3");
}
image4 = SDL_LoadBMP("img/image4.bmp");
if(image4 == NULL){
SDL_DestroyWindow(window);
errorMessage("Impossible de charger l'image 4");
}
currentImage = image1;
int isRunning = 1;
SDL_Event ev;
while(isRunning == 1){
while(SDL_PollEvent(&ev) != 0 ){
if(ev.type == SDL_QUIT){
isRunning = false;
}else if(ev.type == SDL_KEYDOWN){
switch(ev.key.keysym.sym){
case SDLK_UP:
currentImage = image1;
break;
case SDLK_RIGHT:
currentImage = image2;
break;
case SDLK_LEFT:
currentImage = image3;
break;
case SDLK_DOWN:
currentImage = image4;
break;
case SDL_QUIT:
isRunning = 0;
break;
case SDLK_ESCAPE:
menu = displayMenu(windowSurface,mainFont);
if(menu == 1){
isRunning = false;
}
break;
}
}
}
SDL_BlitSurface(currentImage, NULL, windowSurface, NULL);
SDL_UpdateWindowSurface(window);
}
TTF_CloseFont(mainFont);
SDL_FreeSurface(image1);
SDL_FreeSurface(image2);
SDL_FreeSurface(image3);
SDL_FreeSurface(image4);
SDL_DestroyWindow(window);
SDL_FreeSurface(icon);
SDL_DestroyRenderer(renderer);
currentImage = image1 = image2 = image3 = NULL;
window = NULL;
SDL_Quit();
return 0;
}
int displayMenu(SDL_Surface* window, TTF_Font* font){
int x,y; // coordonées de la souris
int i;
int nMenu = CHOICEMENU; //nb de choix
const char* choice[CHOICEMENU] = {"Continuer","Quitter"};
SDL_Surface* menus[CHOICEMENU]; // surface des menus
int selected[CHOICEMENU]={0,0}; // 0 car aucun selectionné pour le moment
SDL_Color colorMenu[2]={{127,122,204},{49,100,226}};
menus[0] = TTF_RenderText_Solid(font, choice[0], colorMenu[0]);
menus[1] = TTF_RenderText_Solid(font, choice[1], colorMenu[1]);
SDL_Rect pos[CHOICEMENU];
pos[0].x = window->clip_rect.w/2 /*= centre */ - menus[0]->clip_rect.w/2;
pos[0].y = window->clip_rect.h/2 - menus[0]->clip_rect.h;
pos[1].x = window->clip_rect.w/2 - menus[0]->clip_rect.w/2;
pos[1].y = window->clip_rect.h/2 + menus[0]->clip_rect.h;
SDL_FillRect(window,&window->clip_rect,SDL_MapRGB(window-
>format,0x00,0x00,0x00));
SDL_Event ev;
while(1){
while(SDL_PollEvent(&ev)){
switch(ev.type){
case SDL_QUIT:
for(i = 0; i < CHOICEMENU ; i++){
SDL_FreeSurface(menus[i]);
}
return 1;
case SDL_MOUSEMOTION: // coordonée souris
x = ev.motion.x;
y = ev.motion.y;
for(i = 0; i < CHOICEMENU; i++){
if(x >= pos[i].x && x<= pos[i].x+pos[i].w && y>=pos[i].y &&
y<=pos[i].y+pos[i].h){
if(!selected[i]){
selected[i] = 1;
SDL_FreeSurface(menus[i]); // on suppr l'ancienne
surface
menus[i] = TTF_RenderText_Solid(font, choice[i],
colorMenu[1]);
} else {
if(selected[i]){
selected[i] = 0;
SDL_FreeSurface(menus[i]); // on suppr
l'ancienne surface
menus[i] = TTF_RenderText_Solid(font, choice[i],
colorMenu[0]);
}
}
}
case SDL_MOUSEBUTTONDOWN: //si qqn a cliquer sur la souris :
x = ev.button.x;
y = ev.button.y;
for (i = 0; i < CHOICEMENU; i+=1){
if(x >= pos[i].x && x<= pos[i].x+pos[i].w && y>=pos[i].y &&
y<=pos[i].y+pos[i].h){
for(i = 0 ;i < CHOICEMENU; i++){
SDL_FreeSurface(menus[i]);
}
return i; // On retourne la valeur actuelle : ex : si je
clique sur "continue" ça return 1
}
}
break;
case SDL_KEYDOWN:
if(ev.key.keysym.sym == SDLK_ESCAPE){
for(i = 0 ;i < CHOICEMENU; i++){
SDL_FreeSurface(menus[i]);
}
return 0;
}
}
}
for(i = 0; i < CHOICEMENU; i+=1){
SDL_BlitSurface(menus[i],NULL,window,&pos[i]);
}
}
}
}