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Итак, я взял SDL и начал писать простую игру. Есть некоторая проблема, с которой я очень смущен, когда пытаюсь нарисовать две текстуры на экране с помощью SDL_RenderCopy. Важная часть находится внутри while (! Quit), где есть два вызова SDL_RenderCopy. По какой-то причине только второй рисует что-то на экране. Вот мой код:SDL/C++ Рендеринг нескольких текстур
#include <SDL.h>
#include <SDL_image.h>
#include <stdio.h>
const int SCREEN_WIDTH = 1280;
const int SCREEN_HEIGHT = 720;
enum TEXTURES{
T_GRASS,
T_ALL
};
bool init();
bool loadMedia(const int texture, char* path);
void close();
SDL_Texture* loadTexture(char* path);
SDL_Window* window = NULL;
SDL_Renderer* renderer = NULL;
SDL_Texture* textures[] = {NULL};
int main(int argc, char* args[]){
if(!init())
printf("Failed to initialize!\n");
else
if(!loadMedia(T_GRASS, "images/tGrass.png"))
printf("Failed to load media!\n");
else{
bool quit = false;
SDL_Event e;
while(!quit){
while(SDL_PollEvent(&e) != 0)
if(e.type == SDL_QUIT)
quit = true;
SDL_RenderClear(renderer);
SDL_Rect pos;
pos.h = 16;
pos.w = 16;
pos.x = 0;
pos.y = 0;
SDL_Rect pos1;
pos1.h = 16;
pos1.w = 16;
pos.x = 16;
pos.y = 16;
SDL_RenderCopy(renderer,textures[T_GRASS],NULL,&pos);
SDL_RenderCopy(renderer,textures[T_GRASS],NULL,&pos1);
SDL_RenderPresent(renderer);
}
}
close();
return 0;
}
bool init(){
bool success = true;
if(SDL_Init(SDL_INIT_VIDEO) < 0){
printf("SDL could not initialize! Error: %s\n", SDL_GetError());
success = false;
}else{
if(!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1"))
printf("WARNING: Linear texture filtering not enabled!\n");
window = SDL_CreateWindow("openZ", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
if(window == NULL){
printf("Window could not be created! Error: %s\n", SDL_GetError());
success = false;
}else{
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
if(renderer == NULL){
printf("Render could not be created! Error: %s\n", SDL_GetError());
success = false;
}else{
SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
int imgFlags = IMG_INIT_PNG;
if(!(IMG_Init(imgFlags) & imgFlags)){
printf("SDL Image could not initialize! Error: %s\n", SDL_GetError());
success = false;
}
}
}
}
return success;
}
bool loadMedia(const int texture, char* path){
bool success = true;
textures[texture] = loadTexture(path);
if(textures[texture] == NULL){
printf("Failed to load texture image %s!\n", path);
success = false;
}
return success;
}
void close(){
for(int i = 0; i < T_ALL; i++){
SDL_DestroyTexture(textures[i]);
textures[i] = NULL;
}
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
window = NULL;
renderer = NULL;
IMG_Quit();
SDL_Quit();
}
SDL_Texture* loadTexture(char* path){
SDL_Texture* newTexture = NULL;
SDL_Surface* loadedSurface = IMG_Load(path);
if(loadedSurface == NULL){
printf("Unable to load image %s! Error: %s\n", path, IMG_GetError());
}else{
newTexture = SDL_CreateTextureFromSurface(renderer, loadedSurface);
if(newTexture == NULL)
printf("Unable to create texture from %s! Error: %s\n", path, SDL_GetError());
SDL_FreeSurface(loadedSurface);
}
return newTexture;
}