65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
#include <SDL3/SDL.h>
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#include <cstdlib>
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#include <ctime>
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struct ARGB
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{
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Uint8 b, g, r, a;
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// Constructor
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ARGB(Uint8 blue = 0, Uint8 green = 0, Uint8 red = 0, Uint8 alpha = 255)
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: b(blue), g(green), r(red), a(alpha) {}
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};
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int main(int argc, char *argv[])
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{
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constexpr int WIDTH = 320;
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constexpr int HEIGHT = 240;
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constexpr int ZOOM = 2;
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srand(static_cast<unsigned>(time(nullptr)));
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SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS);
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SDL_Window *window = SDL_CreateWindow("pixels_white_noise", WIDTH * ZOOM, HEIGHT * ZOOM, SDL_WINDOW_OPENGL);
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SDL_Renderer *renderer = SDL_CreateRenderer(window, nullptr);
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SDL_SetRenderLogicalPresentation(renderer, WIDTH, HEIGHT, SDL_LOGICAL_PRESENTATION_INTEGER_SCALE);
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SDL_Texture *texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT);
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ARGB *pixels;
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int pitch;
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SDL_Event sdlEvent;
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bool exit = false;
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while (!exit)
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{
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while (SDL_PollEvent(&sdlEvent))
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{
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if (sdlEvent.type == SDL_EVENT_QUIT)
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{
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exit = true;
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break;
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}
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}
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SDL_LockTexture(texture, nullptr, (void **)&pixels, &pitch);
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for (int i = 0; i < 76800; ++i)
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{
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pixels[i] = ARGB(rand() % 256, rand() % 256, rand() % 256, 255);
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}
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SDL_UnlockTexture(texture);
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SDL_RenderTexture(renderer, texture, nullptr, nullptr);
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SDL_RenderPresent(renderer);
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}
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SDL_DestroyTexture(texture);
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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SDL_Quit();
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return 0;
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}
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