SDL2 Application is a small, easy to use, library for SDL2, SDL2_image, and glew. The library focuses mostly around OpenGL.
Dependencies for this library are: SDL2, SDL2_image, glew, Crypto++, and GLM, and Google's Protocol Buffer library
Some things this library includes:
- Window handling and the option to use OpenGL rendering over SDL rendering
- Refined event handling
- Pre-Built run loop with options for both fixed and dynamic updating
- Full classes for OpenGL texutures, shaders, vertexbuffer objects, and framebuffer objects (more to come)
- Full classes for SDL textures
- A interface class to run your game through (SDL_Activity)
- Cryptography
- Google Protocol Buffer support and prebuilt properties file
Here is a
Working example application https://github.com/jamolnng/GravityBoost/
and an
Example of a basic application:
main.cpp
#include "GameActivity.h"
#include <SDL.h>
#include <SDL_Application.h>
int main(int arg, char* args[])
{
GameActivity game;
SDL_Application app(&game, true /*Use OpenGL*/, 2 /*OpenGL Major Version*/, 1 /*OpenGL Minor Version*/);
if (app.init())
{
if (app.createWindow("SDL2 Application Test", 854, 500, SDL_WINDOW_RESIZABLE))
{
app.start();
}
}
return app.finish();
}GameActivity.h
#pragma once
#include <SDL_Activity.h>
class GameActivity : public SDL_Activity
{
public:
GameActivity(void);
~GameActivity(void);
void updateDynamic(int deltaTime);
//Called every 1/60th of a second
void updateFixed(void);
void render(void);
void init(void);
void dispose(void);
void onEvent(SDL_Event& sdl_event);
//Only needs to be overriden if you explicitly say to use OpenGL otherwise you do not need the function
bool initGL(void);
};GameActivity.cpp
#include "GameActivity.h"
#include <SDL.h>
#include <SDL_opengl.h>
#include <GL\GLU.h>
GameActivity::GameActivity(void)
{
}
GameActivity::~GameActivity(void)
{
}
void GameActivity::updateDynamic(int deltaTime)
{
}
void GameActivity::updateFixed(void)
{
}
void GameActivity::render(void)
{
}
void GameActivity::init(void)
{
}
void GameActivity::dispose(void)
{
}
void GameActivity::onEvent(SDL_Event& sdl_event)
{
if (sdl_event.type == SDL_KEYDOWN && sdl_event.key.keysym.sym == SDLK_ESCAPE)
{
getApp()->end();
}
}
//Only needs to be overriden if you explicitly say to use OpenGL otherwise you do not need the function
bool GameActivity::initGL(void)
{
int w = getApp()->getWindow()->getWidth();
int h = getApp()->getWindow()->getHeight();
glShadeModel(GL_SMOOTH);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClearDepth(1.0f);
//glDisable(GL_DEPTH_TEST);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_CULL_FACE);
//glCullFace(GL_FRONT);
glEnable(GL_TEXTURE_2D);
glPolygonMode(GL_FRONT, GL_FILL);
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0, w, 0, h);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
return true;
}