【FFmpeg 系列】 SDL 音视频渲染（七）
#include <>
int main(int argc, char *argv[]) {
SDL_Window *window = NULL;
SDL_Renderer *render = NULL;
SDL_Texture *texture = NULL;
int quit = 1;
SDL_Event event;
SDL_Rect rect;
rect.w = 30;
rect.y = 30;
// 初始化 SDL
SDL_Init(SDL_INIT_VIDEO);
// 创建渲染窗口（窗口名,x轴角标,y轴角标,宽度,高度,窗口属性）
window = SDL_CreateWindow("SDL2 Window", 200, 200, 640, 480, SDL_WINDOW_SHOWN);
if (!window) {
SDL_Log("Failed to create window!");
goto __EXIT;
}
// 创建渲染器
render = SDL_CreateRenderer(window, -1, 0);
if (!render) {
SDL_Log("Failed to create render!");
goto __DWINODW;
}
// 设置渲染器颜色色值
SDL_SetRenderDrawColor(render, 255, 0, 0, 255);
// 清空渲染器
SDL_RenderClear(render);
// 将渲染器数据推送到驱动去
SDL_RenderPresent(render);
// 创建渲染器纹理
texture = SDL_CreateTexture(render, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, 640, 480);
if (!texture) {
SDL_Log("Failed to create Texture!");
goto __RENDER;
}
do {
SDL_WaitEvent(&event);
switch (event.type) {
case SDL_QUIT:
quit = 0;
break;
default:
SDL_Log("event type is %d", event.type);
}
rect.x = rand() % 600;
rect.y = rand() % 450;
SDL_SetRenderTarget(render, texture);
SDL_SetRenderDrawColor(render, 0, 0, 0, 0);
SDL_RenderClear(render);
SDL_RenderDrawRect(render, &rect);
SDL_SetRenderDrawColor(render, 255, 0, 0, 0);
SDL_RenderFillRect(render, &rect);
SDL_SetRenderTarget(render, NULL);
SDL_RenderCopy(render, texture, NULL, NULL);
SDL_RenderPresent(render);
} while (quit);
SDL_DestroyTexture(texture);// 销毁渲染器纹理
__RENDER:
SDL_DestroyRenderer(render);// 销毁渲染器
__DWINODW:
SDL_DestroyWindow(window);// 销毁渲染窗口
__EXIT:
SDL_Quit();// 退出 SDL
return 0;
}