#include <SDL2/SDL.h>
#include "config.h"

static SDL_Window *window;
static SDL_Renderer *renderer;
static SDL_Texture *texture;

void initWindow(){
    if (SDL_Init(SDL_INIT_VIDEO)){
        printf("Could not init SDL: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }
    
    atexit(SDL_Quit);
    
    window = SDL_CreateWindow("LS7 Emulator", 
                              SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
                              SCREEN_WIDTH, SCREEN_HEIGHT, 0);
    if (window == NULL){
        printf("Fatal! Could not create SDL Window: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }
    
    renderer = SDL_CreateRenderer(window, -1, 2);
    if (renderer == NULL){
        printf("Fatal! Could not create SDL Renderer: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }
    
    texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888,
                                SDL_TEXTUREACCESS_STREAMING,
                                SCREEN_WIDTH, SCREEN_HEIGHT);
    if (texture == NULL){
        printf("Fatal! Could not create SDL Texture: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }
    
    if (SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_NONE)){
        printf("Fatal! Could not set SDL blend mode: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }
}

void clearScreen(uint32_t pixels[], uint32_t color){
    for (uint32_t i = 0; i < SDL_X_SIZE * SDL_Y_SIZE; i++) pixels[i] = color;
}