When I change som attributes in the gameCode.cpp it does seem to succesfully reload the DLL during runtime
however, i don't see the changes on screen, that was made in the code.
i want it to reload during runtime.
CJsfml_002.cpp
#define SFML_STATIC
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include "SFML\Graphics.hpp"
#include <iostream>
float vel = 7.0f;
typedef void (*rectFP)(sf::RectangleShape *);
int main()
{
sf::RenderWindow window(sf::VideoMode(960, 540), "SFML works!");
window.setFramerateLimit(60);
sf::RectangleShape mRect(sf::Vector2f(40.0f, 40.0f));;
mRect.setPosition(sf::Vector2f(30.0f, 30.0f));
mRect.setFillColor(sf::Color::Green);
// Getting pointer to the rect
sf::RectangleShape *rect = &mRect;
while (window.isOpen())
{
int count = 125;
// Loading DLL
CopyFile("gameCode.dll", "temp_gameCode.dll", false);
HMODULE hm = LoadLibrary("temp_gameCode.dll");
if(hm)
{
std::cout << "LOAD LIB SUCCESS!\n";
}
// Loading DLL function
rectFP rfp = (rectFP)GetProcAddress(hm, "CreateRect");
if(rfp)
{
std::cout << "load func SUCCESS!\n";
}
// Unloads DLL
FreeLibrary(hm);
// Using the DLL function
rfp(rect);
sf::Event event;
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
window.close();
}
window.clear();
// Drawing the rect that was changed by the DLL-function
window.draw(*rect);
window.display();
}
return 0;
}
gameCode.h
#define SFML_STATIC
#include "SFML\Graphics.hpp"
extern "C"
{
__declspec(dllexport) void CreateRect(sf::RectangleShape *RS);
}
gameCode.cpp
#include "gameCode.h"
__declspec(dllexport) void CreateRect(sf::RectangleShape *RS)
{
RS->setSize(sf::Vector2f(100.0f, 200.0f));
RS->setFillColor(sf::Color::Blue);
RS->setPosition(sf::Vector2f(100.0f, 100.0f));
}
build.bat
@echo off
:: IMPORTANT! "=" has to come IMMEDIATLEY after VARIABLE NAME
SET compilerSwitches= /MD /EHsc -Zi -nologo
SET winLibs= user32.lib gdi32.lib winmm.lib Opengl32.lib ws2_32.lib advapi32.lib
SET sfmlDependLibsX64= /LIBPATH:"C:\SFML\SFML-2.5.1_x64\lib" freetype.lib openal32.lib flac.lib vorbisenc.lib vorbisfile.lib vorbis.lib ogg.lib
SET sfmlDependLibsX86= /LIBPATH:"C:\SFML\SFML-2.5.1_x86\lib" freetype.lib openal32.lib flac.lib vorbisenc.lib vorbisfile.lib vorbis.lib ogg.lib
SET sfmlLibsX64= sfml-system-s.lib sfml-graphics-s.lib sfml-window-s.lib sfml-audio-s.lib sfml-network-s.lib
SET sfmlLibsX86= sfml-system-s.lib sfml-graphics-s.lib sfml-window-s.lib sfml-audio-s.lib sfml-network-s.lib
If NOT EXIST ..\buildx64 mkdir ..\buildx64
If NOT EXIST ..\buildx86 mkdir ..\buildx86
If NOT EXIST ..\assets mkdir ..\assets
pushd ..\buildx64
cl %compilerSwitches% /I ..\include ..\src\CJsfml_002.cpp %winLibs% /link %sfmlDependLibsX64% %sfmlLibsX64%
cl %compilerSwitches% /I ..\include ..\src\gameCode.cpp /LD %winLibs% /link %sfmlDependLibsX64% %sfmlLibsX64%
popd
@echo x64 build Done!
::------------------ x86 BUILD (set vcvarsx86) -----------------
::pushd ..\buildx86
::cl /MD /EHsc -Zi -nologo /I ..\include ..\src\CJsfml_002.cpp %winLibs% /link %sfmlDependLibsX86% %sfmlLibsX86%
::popd
::
::@echo x86 build Done!
del *.~ *.cpp~ *.bat~ *.un~ *.h~
