Divide by zero and speed up bug fixes

[hackapet/Adafruit_Blinka_Displayio.git] / displayio / tilegrid.py

diff --git a/displayio/tilegrid.py b/displayio/tilegrid.py
index d5b344680ed6bece88ac30079d566938e3337b18..c88498da33e94d2e11755c06ba0c51771b350169 100644 (file)
--- a/displayio/tilegrid.py
+++ b/displayio/tilegrid.py
@@ -103,10 +103,10 @@ class TileGrid:
             tile_width = bitmap_width
         if tile_height is None:
             tile_height = bitmap_height
-        if bitmap_width % tile_width != 0:
+        if tile_width > 0 and bitmap_width % tile_width != 0:
             raise ValueError("Tile width must exactly divide bitmap width")
         self._tile_width = tile_width
-        if bitmap_height % tile_height != 0:
+        if tile_height > 0 and bitmap_height % tile_height != 0:
             raise ValueError("Tile height must exactly divide bitmap height")
         self._tile_height = tile_height
         if not 0 <= default_tile <= 255:
@@ -198,23 +198,18 @@ class TileGrid:
         return pixel_value
 
     def _apply_palette(self, image):
-        if isinstance(self._pixel_shader, Palette):
-            image.putpalette(
-                self._pixel_shader._get_palette()  # pylint: disable=protected-access
-            )
-        if isinstance(self._pixel_shader, ColorConverter):
-            # This will be needed for eInks, grayscale, and monochrome displays
-            pass
+        image.putpalette(
+            self._pixel_shader._get_palette()  # pylint: disable=protected-access
+        )
 
     def _add_alpha(self, image):
-        if isinstance(self._pixel_shader, Palette):
-            alpha = self._bitmap._image.copy().convert(  # pylint: disable=protected-access
-                "P"
-            )
-            alpha.putpalette(
-                self._pixel_shader._get_alpha_palette()  # pylint: disable=protected-access
-            )
-            image.putalpha(alpha.convert("L"))
+        alpha = self._bitmap._image.copy().convert(  # pylint: disable=protected-access
+            "P"
+        )
+        alpha.putpalette(
+            self._pixel_shader._get_alpha_palette()  # pylint: disable=protected-access
+        )
+        image.putalpha(alpha.convert("L"))
 
     # pylint: disable=too-many-locals
     def _fill_area(self, buffer):
@@ -237,12 +232,15 @@ class TileGrid:
                 tile_index = self._tiles[tile_y * self._width + tile_x]
                 tile_index_x = tile_index % tile_count_x
                 tile_index_y = tile_index // tile_count_x
-                tile_image = self._bitmap._image.copy().convert(  # pylint: disable=protected-access
-                    "P"
-                )
-                self._apply_palette(tile_image)
-                tile_image = tile_image.convert("RGBA")
-                self._add_alpha(tile_image)
+                tile_image = self._bitmap._image  # pylint: disable=protected-access
+                if isinstance(self._pixel_shader, Palette):
+                    tile_image = tile_image.copy().convert("P")
+                    self._apply_palette(tile_image)
+                    tile_image = tile_image.convert("RGBA")
+                    self._add_alpha(tile_image)
+                elif isinstance(self._pixel_shader, ColorConverter):
+                    # This will be needed for eInks, grayscale, and monochrome displays
+                    pass
                 image.alpha_composite(
                     tile_image,
                     dest=(tile_x * self._tile_width, tile_y * self._tile_height),