Question

我一直在尝试在Visual Studio 2017中创建一个简单的C ++游戏，但我甚至无法获得简单的黑屏。窗户出现白色而且反应迟钝，有人能帮忙吗？我一直在学习Udemy的免费课程，它一直在努力。我的代码如下。

#include <iostream>
#include <SDL.h>
#include <string>
using namespace std;
int main(int argc, char* argv[]) {
    const int screenWidth = 800;
    const int screenLength = 600;
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        cout << "SDL init faliure" << endl;
        return 0;

    }
    SDL_Window *window = SDL_CreateWindow("Particle Fire", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, screenWidth, screenLength, SDL_WINDOW_SHOWN);
    SDL_Delay(100000);

    if (window == NULL) {
        SDL_Quit();
        return 2;
    }
    SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC);
    SDL_Texture * texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STATIC, screenWidth, screenLength);

        if (renderer == NULL) {
            cout << "Could not produce renderer";
            SDL_DestroyWindow(window);
                SDL_Quit();
            return 3;

        }
    if (texture == NULL) {
        cout << "Could not produce texture";
        SDL_DestroyRenderer(renderer);
        SDL_DestroyWindow(window);
            SDL_Quit();
        return 3;
    }
    Uint32 *buffer = new Uint32[screenWidth*screenLength];
    memset(buffer, 0xFF, screenWidth*screenLength*sizeof(Uint32));
    for (int i=0; i < screenWidth*screenLength; i++) {

        buffer[i = 0xFFFF0000];
    }
    SDL_UpdateTexture(texture, NULL, buffer, screenWidth * sizeof(Uint32));
    SDL_RenderClear(renderer);
    SDL_RenderCopy(renderer, texture, NULL, NULL);
    SDL_RenderPresent(renderer);
    bool quit = false;
    SDL_UpdateTexture(texture, NULL, buffer, screenWidth * sizeof(Uint32));
        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer,texture , NULL, NULL);
        SDL_RenderPresent(renderer);
    SDL_Event event;
    while (!quit) {

        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT) {
                quit = true;
            } }

    }
    delete buffer;
    SDL_DestroyTexture(texture);
        SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
}

我尝试过更改所有内容，但它不起作用。

Answer 1

创建窗口SDL_Delay(100000);后，您有100秒的延迟。

此外，您需要将buffer[i = 0xFFFF0000]更改为buffer[i] = 0xFFFF0000。第一个只设置i并保持缓冲区不变。第二个使像素变黄。

Visual Studio 2017空白窗口，反应迟钝

1 个答案: