From 34858842acf9a86a32003f7ed256192064a994ed Mon Sep 17 00:00:00 2001
From: Manuel Palenzuela <manuelpalenzuelamerino@gmail.com>
Date: Mon, 19 Jul 2021 18:26:09 +0100
Subject: Feature: Prepared SDL window for pixel drawing instruction

---
 main.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'main.c')

diff --git a/main.c b/main.c
index a257c96..3e4773d 100644
--- a/main.c
+++ b/main.c
@@ -1,4 +1,5 @@
 #include <emulator.h>
+#include "/usr/local/include/SDL2/SDL.h"
 
 int main(int argc, char** argv);
 void show_help();
@@ -11,6 +12,12 @@ int main(int argc, char** argv)
         return 1;
     }
 
+
+    SDL_Init(SDL_INIT_VIDEO);
+    SDL_Window * window = SDL_CreateWindow("CHIP8 Emulator", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 64 * PIXEL_RATIO, 32 * PIXEL_RATIO, 0);
+    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, 0);
+    SDL_Texture * texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, 64, 32);
+
     Emulator emulator;
 
     emulator_initialise(&emulator);
@@ -20,12 +27,43 @@ int main(int argc, char** argv)
 
     printf("Hello brother!\n");
 
+    uint32_t pixels[32 * 64];
+    for(int w = 0; w < 64; ++w)
+        for(int h = 0; h < 32; ++h)
+        {
+            uint8_t pixel = emulator.display[w][h];
+            pixels[64 * h + w] = (0x00FFFFFF * pixel) | 0xFF000000;
+        }
+
+    SDL_Event event;
     while(emulator.is_on == 1)
     {
+        while(SDL_PollEvent(&event))
+        {
+            if(event.type == SDL_QUIT)
+                goto exit;
+        }
+
         emulator_tick(&emulator);
+
+        if(emulator.draw_flag == 1)
+        {
+            SDL_UpdateTexture(texture, NULL, pixels, sizeof(uint32_t) * 64);
+            SDL_RenderClear(renderer);
+            SDL_RenderCopy(renderer, texture, NULL, NULL);
+            SDL_RenderPresent(renderer);
+            emulator.draw_flag = 0;
+        }
+
         usleep(1000000 / INSTRUCTIONS_PER_SECOND);
     }
 
+    exit:
+    SDL_DestroyTexture(texture);
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+    SDL_Quit();
+
     return 0;
 }
 
-- 
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