Initial commit

scripts/bg_to_rgb565.py

@@ -0,0 +1,54 @@
+from PIL import Image
+
+
+def load_image(filename: str) -> Image.Image:
+    image = Image.open(filename)
+    image = image.convert("RGB")
+    return image
+
+
+def convert_img_to_rgb565(image: Image.Image) -> bytearray: 
+    width, height = image.size
+    
+    rgb565_data = bytearray()
+
+    for y in range(height):
+        for x in range(width):
+            r, g, b = image.getpixel((x, y))
+
+            r = (r >> 3) & 0x1F
+            g = (g >> 2) & 0x3F 
+            b = (b >> 3) & 0x1F
+            
+            high_byte = (r << 3) | (g >> 3)
+            low_byte = ((g << 5) | b) & 0xFF
+            
+
+            rgb565_data.append(high_byte)
+            rgb565_data.append(low_byte)
+            
+    return width, height, rgb565_data
+
+
+def save_rgb565(filename: str, rgb565_data: list[bytearray], width: int, height: int):
+    with open(filename, "wb") as f:
+        ## A lo mejor cambio esta cabecera? ns
+        f.write(width.to_bytes(1, "little"))
+        f.write(height.to_bytes(1, "little"))
+        f.write(rgb565_data)
+        
+        f.close()
+        
+        
+if __name__ == "__main__":
+    import sys
+    if len(sys.argv) != 3:
+        print("Usage: python bg_to_rgb565.py <input_image> <output_file>")
+        sys.exit(1)
+
+    input_image = sys.argv[1]
+    output_file = sys.argv[2]
+
+    image = load_image(input_image)
+    width, height, rgb565_data = convert_img_to_rgb565(image)
+    save_rgb565(output_file, rgb565_data, width, height)

scripts/png_to_rgb565.py

@@ -0,0 +1,85 @@
+from PIL import Image
+import sys
+
+
+def split_image(filename: str) -> list[bytearray]:
+    image = Image.open(filename)
+    image = image.convert("RGBA")
+    
+    width, height = image.size
+    n_tiles_x = width // 16
+    n_tiles_y = height // 16
+    
+    n_tiles = n_tiles_x * n_tiles_y
+    
+    tiles = []
+    
+    for i in range(n_tiles):
+        x = (i % n_tiles_x) * 16
+        y = (i // n_tiles_x) * 16
+
+        w = x + 16
+        h = y + 16
+        
+        tile = image.crop((x, y, w, h))
+        tile.save(f"tile_{i}.png")
+        tiles.append(tile)
+        
+        
+    return tiles
+
+
+def convert_image(tiles: list) -> tuple[list[bytearray], int, int]:
+    width, height = tiles[0].size
+    rgb565_tiles = []
+
+    for img in tiles:
+        rgb565_data = bytearray()
+
+        for y in range(height):
+            for x in range(width):
+                r, g, b, a = img.getpixel((x, y))
+
+                r = (r >> 3) & 0x1F 
+                g = (g >> 2) & 0x3F
+                b = (b >> 3) & 0x1F 
+                
+                if a < 255:
+                    high_byte = 0x01
+                    low_byte = 0x20
+                else:
+                    high_byte = (r << 3) | (g >> 3)
+                    low_byte = ((g << 5) | b) & 0xFF
+
+                rgb565_data.append(high_byte)
+                rgb565_data.append(low_byte)
+
+        rgb565_tiles.append(rgb565_data)
+
+    return rgb565_tiles, width, height
+    
+
+def save_rgb565(filename: str, rgb565_data: list[bytearray], width: int, height: int):
+    with open(filename, "wb") as f:
+        ## Y esta cabecera tambien
+        f.write(width.to_bytes(1, "little"))
+        f.write(height.to_bytes(1, "little"))
+        f.write(len(rgb565_data).to_bytes(1, "little"))
+        
+        for rgb565_tile in enumerate(rgb565_data):
+            f.write(rgb565_tile[1])
+
+    
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("Usage: python png_to_rgb565.py <input.png> <output.rgb565>")
+        sys.exit(1)
+    
+    filename = sys.argv[1]
+    output_filename = sys.argv[2]
+    
+    tiles = split_image(filename)
+    rgb565_data, width, height = convert_image(tiles)
+    save_rgb565(output_filename, rgb565_data, width, height)
+    
+    print(f"Converted {filename} to {output_filename} with dimensions {width}x{height}.")