LO27/LibGui/pixel.c

/*
* @Author: klmp200
* @Date:   2016-12-27 19:59:21
* @Last Modified by:   klmp200
* @Last Modified time: 2016-12-28 23:57:29
*/

#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <pixel.h>
#include <matrix.h>
#include <CellElement.h>

void SetPixel(SDL_Renderer *renderer, int x, int y, bool value){

	if (value){
		SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
	} else {
		SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
	}
	SDL_RenderDrawPoint(renderer, x, y);
}

void DisplayMatrixSDL(SCREEN *screen, Matrix m){
	int i;
	int j;

	SDL_SetRenderDrawColor(screen->renderer, 0, 0, 0, 0);
	SDL_RenderClear(screen->renderer);

	for (i=0;i<m.rowCount;i++){
		for (j=0;j<m.colCount;j++){
			SetPixel(screen->renderer, i, j, GetCellValue(m, j, i));
		}
	}
	SDL_RenderPresent(screen->renderer);
}

void WaitUntilEnter(SCREEN * screen){
	int keypress = 0;

	while (!keypress){
		while(SDL_PollEvent(&screen->event)){
			switch (screen->event.type){
				case SDL_QUIT:
					keypress = 1;
					break;
				case SDL_KEYDOWN:
					switch(screen->event.key.keysym.sym){
						case SDLK_RETURN:
							keypress = 1;
							break;
					}
			}
		}
	}
}

int NewWindowFromMatrix(Matrix m){
	SCREEN screen;

	screen.WIDTH = m.colCount;
	screen.HEIGHT = m.rowCount;

	if (SDL_Init(SDL_INIT_VIDEO) < 0){
		return 1;
	}

	SDL_CreateWindowAndRenderer(screen.WIDTH, screen.HEIGHT,
			                    SDL_WINDOW_RESIZABLE | SDL_WINDOW_INPUT_FOCUS | SDL_WINDOW_SHOWN,
			                    &(screen.window), &(screen.renderer));

	if (screen.window == NULL || screen.renderer == NULL){
		SDL_Quit();
		return 1;
	}

	DisplayMatrixSDL(&screen, m);

	WaitUntilEnter(&screen);

	SDL_DestroyRenderer(screen.renderer);
	SDL_DestroyWindow(screen.window);

	return 0;
}