2019-nes-emulator/Source/Platform.cpp

#include "Platform.hpp"
#include "Input.hpp"
#include <SDL2/SDL.h>


Platform::Platform(char const* title, int windowWidth, int windowHeight, int textureWidth, int textureHeight)
{
	SDL_Init(SDL_INIT_VIDEO);

	window = SDL_CreateWindow(title, 0, 0, windowWidth, windowHeight, SDL_WINDOW_SHOWN);

	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

	texture = SDL_CreateTexture(
		renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, textureWidth, textureHeight);
}

Platform::~Platform()
{
	SDL_DestroyTexture(texture);
	SDL_DestroyRenderer(renderer);
	SDL_DestroyWindow(window);
	SDL_Quit();
}

void Platform::Update(void const* buffer, int pitch)
{
	SDL_UpdateTexture(texture, nullptr, buffer, pitch);
	SDL_RenderClear(renderer);
	SDL_RenderCopy(renderer, texture, nullptr, nullptr);
	SDL_RenderPresent(renderer);
}

bool Platform::ProcessInput(uint8_t* buttons)
{
	bool quit = false;

	SDL_Event event{};

	while (SDL_PollEvent(&event))
	{
		switch (event.type)
		{
			case SDL_QUIT:
			{
				quit = true;
				break;
			}

			case SDL_KEYDOWN:
			{
				switch (event.key.keysym.sym)
				{
					case SDLK_ESCAPE:
					{
						quit = true;
						break;
					}
					case SDLK_UP:
					{
						 {buttons[Buttons::Up] = 1u;}
						break;
					}
					case SDLK_DOWN:
					{
						 {buttons[Buttons::Down] = 1u;}
						break;
					}
					case SDLK_LEFT:
					{
						 {buttons[Buttons::Left] = 1u;}
						break;
					}
					case SDLK_RIGHT:
					{
						 {buttons[Buttons::Right] = 1u;}
						break;
					}
					case SDLK_LSHIFT:
					{
						 buttons[Buttons::Select] = 1u;
						break;
					}
					case SDLK_RETURN:
					{
						 {buttons[Buttons::Start] = 1u;}
						break;
					}
					case SDLK_z:
					{
						 {buttons[Buttons::A] = 1u;}
						break;
					}
					case SDLK_x:
					{
						 {buttons[Buttons::B] = 1u;}
						break;
					}
				}

				break;
			}

			case SDL_KEYUP:
			{
				switch (event.key.keysym.sym)
				{
					case SDLK_UP:
					{
						 {buttons[Buttons::Up] = 0u;}
						break;
					}
					case SDLK_DOWN:
					{
						 {buttons[Buttons::Down] = 0u;}
						break;
					}
					case SDLK_LEFT:
					{
						 {buttons[Buttons::Left] = 0u;}
						break;
					}
					case SDLK_RIGHT:
					{
						 {buttons[Buttons::Right] = 0u;}
						break;
					}
					case SDLK_LSHIFT:
					{
						 {buttons[Buttons::Select] = 0u;}
						break;
					}
					case SDLK_RETURN:
					{
						 {buttons[Buttons::Start] = 0u;}
						break;
					}
					case SDLK_z:
					{
						 {buttons[Buttons::A] = 0u;}
						break;
					}
					case SDLK_x:
					{
						 {buttons[Buttons::B] = 0u;}
						break;
					}
				}

				break;
			}
		}
	}


	return quit;
}