88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
#include <SDL2/SDL.h>
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#include <iostream>
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using namespace std;
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const int screen_width = 640;
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const int scren_height = 480;
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SDL_Window* win = NULL;
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SDL_Renderer* ren = NULL;
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SDL_Texture* LoadImage(const char* path)
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{
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SDL_Surface* loadedImage = NULL;
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SDL_Texture* texture = NULL;
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loadedImage = SDL_LoadBMP(path);
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if (loadedImage != 0)
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{
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texture = SDL_CreateTextureFromSurface(ren, loadedImage);
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SDL_FreeSurface(loadedImage);
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}
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else
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cout << SDL_GetError() << endl;
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return texture;
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}
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void ApplySurfaces(int x, int y, SDL_Texture* tex, SDL_Renderer* ren)
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{
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SDL_Rect pos;
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pos.x = x;
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pos.y = y;
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SDL_QueryTexture(tex, NULL, NULL, &pos.w, &pos.h); //Функция заполнит pos.w и pos.h для формата текстуры 1:1
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SDL_RenderCopy(ren, tex, NULL, &pos); //В нужной точке рисуем текстуру с оригинальной высотой и шириной
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}
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int main()
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{
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if (SDL_Init(SDL_INIT_EVERYTHING) == -1)
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{
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cout << SDL_GetError() << endl;
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return 1;
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}
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win = SDL_CreateWindow("Lesson 2", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, screen_width, scren_height, SDL_WINDOW_SHOWN);
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if (win == NULL)
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{
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cout << SDL_GetError() << endl;
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return 2;
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}
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ren = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
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if (ren == NULL)
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{
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cout << SDL_GetError() << endl;
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return 3;
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}
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SDL_Texture *background = NULL, *image = nullptr;
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image = LoadImage("./image.bmp");
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background = LoadImage("./background.bmp");
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if (image == NULL || background == NULL)
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{
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cout << "bad LoadImage\n";
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return 4;
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}
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SDL_RenderClear(ren);
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int bW, bH;
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SDL_QueryTexture(background, NULL, NULL, &bW, &bH);
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cout << bW << " " << bH << endl;
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ApplySurfaces( 0, 0, background, ren);
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ApplySurfaces( bW, 0, background, ren);
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ApplySurfaces( 0, bH, background, ren);
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ApplySurfaces( bW, bH, background, ren);
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int iW, iH;
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SDL_QueryTexture(image, NULL, NULL, &iW, &iH);
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int x = (screen_width - iW) / 2;
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int y = (scren_height - iH) / 2;
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ApplySurfaces(x, y, image, ren);
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SDL_RenderPresent(ren);
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SDL_Delay(10000);
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SDL_DestroyTexture(background);
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SDL_DestroyTexture(image);
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SDL_DestroyRenderer(ren);
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SDL_DestroyWindow(win);
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SDL_Quit();
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return 0;
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} |