Screen.cpp

#include "stdafx.h"
#include "Screen.h"

namespace SDL_Testing {
	
	Screen::Screen(): m_window(NULL),
		m_renderer(NULL),
		m_texture(NULL),
		m_buffer1(NULL),
		m_buffer2(NULL) {

	}

	

	bool Screen::init() {
		if (SDL_Init(SDL_INIT_VIDEO) < 0) {
			return false;
		}

		m_window = SDL_CreateWindow("Particle Fire Explosion",
			SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);

		if (m_window == NULL) {
			SDL_Quit();
			return false;
		}

		m_renderer = SDL_CreateRenderer(m_window, -1, SDL_RENDERER_PRESENTVSYNC);
		m_texture = SDL_CreateTexture(m_renderer, SDL_PIXELFORMAT_RGBA8888,
			SDL_TEXTUREACCESS_STATIC, SCREEN_WIDTH, SCREEN_HEIGHT);

		if (m_renderer == NULL) {
			SDL_DestroyRenderer(m_renderer);
			SDL_DestroyWindow(m_window);
			SDL_Quit();
			return false;
		}

		if (m_texture == NULL) {
			SDL_DestroyRenderer(m_renderer);
			SDL_DestroyWindow(m_window);
			SDL_Quit();
			return false;
		}

		m_buffer1 = new Uint32[SCREEN_WIDTH*SCREEN_HEIGHT];
		m_buffer2 = new Uint32[SCREEN_WIDTH*SCREEN_HEIGHT];

		memset(m_buffer1, 0, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(Uint32));
		memset(m_buffer2, 0, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(Uint32));

		return true;
	}

	void Screen::boxBlur() {
		// Swap Buffers
		Uint32 * temp;
		m_buffer1 = m_buffer2;
		m_buffer2 = m_buffer1;
	}

	void Screen::setPixel(int x, int y, Uint8 red, Uint8 green, Uint8 blue) {

		if (x < 0 || x >= SCREEN_WIDTH || y < 0 || y >= SCREEN_HEIGHT) return;

		Uint32 color = 0;

		color += red;
		color <<= 8;
		color += green;
		color <<= 8;
		color += blue;
		color <<= 8;
		color += 0xFF;

		m_buffer1[(y * SCREEN_WIDTH) + x] = color;
	}

	void Screen::update() {
		SDL_UpdateTexture(m_texture, NULL, m_buffer1, SCREEN_WIDTH * sizeof(Uint32));
		SDL_RenderClear(m_renderer);
		SDL_RenderCopy(m_renderer, m_texture, NULL, NULL);
		SDL_RenderPresent(m_renderer);

	}

	void Screen::clear() {
		memset(m_buffer1, 0, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(Uint32));
		memset(m_buffer2, 0, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(Uint32));
	}

	bool Screen::processEvents() {
		SDL_Event event;

		while (SDL_PollEvent(&event)) {
			if (event.type == SDL_QUIT) {
				return false;
			}
		}
		return true;
	}
	void Screen::close() {
		delete[] m_buffer1;
		delete[] m_buffer2;
		SDL_DestroyRenderer(m_renderer);
		SDL_DestroyTexture(m_texture);
		SDL_DestroyWindow(m_window);
		SDL_Quit();
	}

}