Minor changes

1 files changed, 32 insertions, 1 deletions

diff --git a/src/screen.c b/src/screen.c
index 61828b1..727d8ed 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -1,17 +1,48 @@
 #include "screen.h"
 
+SCREEN_DATA Screen; 
+
 void ScreenInit(int width, int height){
+  // Init emulated screen:
+  Screen.width=width;
+  Screen.height=height;
+  int px_width=width/64;
+  int px_height=height/32;
+  Screen.pixel=(px_width < px_height) ? px_width: px_height;
+  Screen.originX=(width-64*Screen.pixel)/2;
+  Screen.originY=(height-32*Screen.pixel)/2;
+  ScreenClear();
+  
   InitWindow(width, height, "Chip-8 Emulator");
   SetTargetFPS(60); // Set game to run at 60 frames-per-second
 }
 
+void ScreenClear() {
+  for(int i=0;i<64*32;i++){
+    Screen.pixels[i]=0;
+  }
+}
+
 void ScreenUpdate(){
   BeginDrawing();
   ClearBackground(RAYWHITE);
-  DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);
+  //  DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);
+  for(int x=0;x<64;x++){
+    for(int y=0;y<32;y++){
+      if(Screen.pixels[x+y*64] == 0)
+        DrawRectangle(Screen.originX+Screen.pixel*x,Screen.originY+Screen.pixel*y,Screen.pixel,Screen.pixel,BLACK);
+      else
+        DrawRectangle(Screen.originX+Screen.pixel*x,Screen.originY+Screen.pixel*y,Screen.pixel,Screen.pixel,WHITE);
+    }
+  }  
+
   EndDrawing();
 }
 
+void ScreenSetPixel(int x, int y, char state){
+  Screen.pixels[x+y*64]=(state==0) ? 0: 1;
+}
+
 void ScreenFinish(){
   CloseWindow(); // Close window and OpenGL context
 }