安装sdl
下载 SDL3-devel-3.2.28-mingw.zip
并解压到
D:\soft\vcpkg\myCMakeLists.txt
cmake_minimum_required(VERSION3.15)project(SDL3Demo LANGUAGES C CXX)# 强制 32-bit 编译set(CMAKE_C_FLAGS"${CMAKE_C_FLAGS}-m32")set(CMAKE_CXX_FLAGS"${CMAKE_CXX_FLAGS}-m32")# SDL3 根路径（按你本地实际改）set(SDL3_ROOT"D:/soft/vcpkg/my/SDL3-devel-3.2.28-mingw/SDL3-3.2.28")set(SDL3_INCLUDE_DIR"${SDL3_ROOT}/i686-w64-mingw32/include")set(SDL3_LIB_DIR"${SDL3_ROOT}/i686-w64-mingw32/lib")set(SDL3_DLL_PATH"${SDL3_ROOT}/i686-w64-mingw32/bin/SDL3.dll")if(NOT EXISTS"${SDL3_INCLUDE_DIR}")message(FATAL_ERROR"SDL3 include not found:${SDL3_INCLUDE_DIR}")endif()if(NOT EXISTS"${SDL3_LIB_DIR}")message(FATAL_ERROR"SDL3 lib dir not found:${SDL3_LIB_DIR}")endif()if(NOT EXISTS"${SDL3_DLL_PATH}")message(FATAL_ERROR"SDL3.dll not found:${SDL3_DLL_PATH}")endif()find_library(SDL3_LIB NAMES SDL3 libSDL3 PATHS"${SDL3_LIB_DIR}"NO_DEFAULT_PATH)if(NOT SDL3_LIB)message(FATAL_ERROR"Could not find libSDL3.a in${SDL3_LIB_DIR}")endif()add_executable(sdl3_demo main.cpp)target_include_directories(sdl3_demo PRIVATE"${SDL3_INCLUDE_DIR}")# 复制 SDL3.dll 到可执行目录add_custom_command(TARGET sdl3_demo POST_BUILD COMMAND${CMAKE_COMMAND}-E copy_if_different"${SDL3_DLL_PATH}"$<TARGET_FILE_DIR:sdl3_demo>COMMENT"Copy SDL3.dll (i686) to output dir")target_link_libraries(sdl3_demo PRIVATE mingw32"${SDL3_LIB}"user32 gdi32 winmm imm32 ole32 oleaut32 shell32 version uuid)target_link_options(sdl3_demo PRIVATE -Wl,--enable-auto-import -Wl,--kill-at)main.cpp
#include<SDL3/SDL.h>#include<iostream>#include<vector>#include<cmath>// 画圆函数（SDL3 没有内置圆函数，需要我们自己画）voiddrawCircle(SDL_Renderer*renderer,intcx,intcy,intr){for(intw=-r;w<=r;w++){for(inth=-r;h<=r;h++){if(w*w+h*h<=r*r){SDL_RenderPoint(renderer,cx+w,cy+h);}}}}intmain(intargc,char*argv[]){if(!SDL_Init(SDL_INIT_VIDEO)){std::cerr<<"SDL_Init Error: "<<SDL_GetError()<<std::endl;return-1;}SDL_Window*window=SDL_CreateWindow("SDL3 Circle Demo",320,240,SDL_WINDOW_RESIZABLE);if(!window){std::cerr<<"SDL_CreateWindow Error: "<<SDL_GetError()<<std::endl;return-1;}SDL_Renderer*renderer=SDL_CreateRenderer(window,nullptr);if(!renderer){std::cerr<<"SDL_CreateRenderer Error: "<<SDL_GetError()<<std::endl;return-1;}bool running=true;SDL_Event event;// 保存所有点击点std::vector<SDL_FPoint>points;while(running){while(SDL_PollEvent(&event)){switch(event.type){caseSDL_EVENT_QUIT:running=false;break;caseSDL_EVENT_MOUSE_BUTTON_DOWN:// 保存点击位置points.push_back({(float)event.button.x,(float)event.button.y});std::cout<<"Click: x="<<event.button.x<<", y="<<event.button.y<<std::endl;break;default:break;}}// 背景色SDL_SetRenderDrawColor(renderer,30,60,180,255);SDL_RenderClear(renderer);// 画所有点击的小圆SDL_SetRenderDrawColor(renderer,255,255,0,255);// 黄色圆点for(auto&pt:points){drawCircle(renderer,(int)pt.x,(int)pt.y,5);// 半径=5}SDL_RenderPresent(renderer);}SDL_DestroyRenderer(renderer);SDL_DestroyWindow(window);SDL_Quit();return0;}
