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#include <window.hpp>
#include <config.hpp>
#include <GL/glew.h>
#include <SDL2/SDL_opengl.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_mixer.h>
constexpr const char* WINDOW_TITLE = "gamedev";
WindowSystem::WindowSystem(void)
{
// attempt to initialize SDL
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
std::cout << "SDL was not able to initialize! Error: " << SDL_GetError();
abort();
}
atexit(SDL_Quit);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
// attempt to initialize SDL_image
if (!(IMG_Init(IMG_INIT_PNG | IMG_INIT_JPG) & (IMG_INIT_PNG | IMG_INIT_JPG))) {
std::cout << "Could not init image libraries! Error: " << IMG_GetError();
abort();
}
atexit(IMG_Quit);
// attempt to initialize SDL_mixer
if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 2048) < 0) {
std::cout << "SDL_mixer could not initialize! Error: " << Mix_GetError();
abort();
}
Mix_AllocateChannels(8);
atexit(Mix_Quit);
atexit(Mix_CloseAudio);
// create the SDL window object
window = SDL_CreateWindow(WINDOW_TITLE,
SDL_WINDOWPOS_UNDEFINED, // Spawn the window at random (undefined) x and y coordinates
SDL_WINDOWPOS_UNDEFINED, //
game::SCREEN_WIDTH,
game::SCREEN_HEIGHT,
SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL
);
if (window == nullptr) {
std::cout << "The window failed to generate! SDL_Error: " << SDL_GetError();
abort();
}
// create the OpenGL object that SDL provides
if ((glContext = SDL_GL_CreateContext(window)) == nullptr) {
std::cout << "The OpenGL context failed to initialize! SDL_Error: " << SDL_GetError();
abort();
}
}
void WindowSystem::die(void)
{
SDL_GL_DeleteContext(glContext);
SDL_DestroyWindow(window);
}
void WindowSystem::configure(entityx::EventManager &ev)
{
ev.subscribe<WindowResizeEvent>(*this);
ev.subscribe<ScreenshotEvent>(*this);
}
void WindowSystem::receive(const WindowResizeEvent &wre)
{
game::SCREEN_WIDTH = wre.x;
game::SCREEN_HEIGHT = wre.y;
glViewport(0, 0, wre.x, wre.y);
SDL_SetWindowSize(window, wre.x, wre.y);
}
#include <ui.hpp>
#include <atomic>
static std::atomic_bool doScreenshot;
void WindowSystem::receive(const ScreenshotEvent &scr)
{
(void)scr;
doScreenshot.store(true);
}
void WindowSystem::render(void)
{
if (doScreenshot.load()) {
doScreenshot.store(false);
// Make the BYTE array, factor of 3 because it's RBG.
int count = 3 * game::SCREEN_WIDTH * game::SCREEN_HEIGHT;
GLubyte* pixels = new GLubyte[count];
glReadPixels(0, 0, game::SCREEN_WIDTH, game::SCREEN_HEIGHT, GL_BGR, GL_UNSIGNED_BYTE, pixels);
ui::takeScreenshot(pixels);
}
SDL_GL_SwapWindow(window);
}
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