background

1 files changed, 13 insertions, 1 deletions

diff --git a/src/sliceitoff/display/display.py b/src/sliceitoff/display/display.py
index 65b4713..a161dc4 100644
--- a/src/sliceitoff/display/display.py
+++ b/src/sliceitoff/display/display.py
@@ -7,6 +7,14 @@ from .static import CGA_COLORS
 
 DEBUG = os.getenv("DEBUG")
 
+def gen_backdrop(color, color2):
+    """ generates backdrop with 50% dithering """
+    srfc = pygame.Surface((320, 240))
+    for x in range(320):
+        for y in range(240):
+            srfc.set_at((x,y),color if (x+y)%2 else color2)
+    return srfc
+        
 
 class Display():
     """display.Display - Handles graphics. Init, clear, draw, borders... """
@@ -18,6 +26,9 @@ class Display():
                 pygame.FULLSCREEN | pygame.SCALED,
                 vsync = 1 )
         Scaling.update_scaling(self.screen.get_size())
+        self.backdrop = pygame.transform.scale_by(
+                gen_backdrop(CGA_COLORS[1], CGA_COLORS[8]),
+                1_000 * Scaling.factor)
         if DEBUG:
             print(
                     "DISPLAY: \n"
@@ -30,7 +41,8 @@ class Display():
 
     def update(self, groups = None):
         """ Updates the screen: clear, blit gropus and flip """
-        self.screen.fill(CGA_COLORS[4], rect=Scaling.active)
+        self.screen.blit(self.backdrop, (Scaling.left,Scaling.top))
+        # fill(CGA_COLORS[4], rect=Scaling.active)
         for group in groups:
             group.draw(self.screen)
         self.screen.fill(0, rect=Scaling.borders[0])