X-Git-Url: https://git.ayoreis.com/hackapet/Adafruit_Blinka_Displayio.git/blobdiff_plain/e7f558f790efd2492cb53f43c077dce21fb5428b..d44b4c927df2cc46f2786f95901212e5d951d1aa:/displayio/tilegrid.py?ds=inline

diff --git a/displayio/tilegrid.py b/displayio/tilegrid.py
index 861384e..04ceb08 100644
--- a/displayio/tilegrid.py
+++ b/displayio/tilegrid.py
@@ -99,10 +99,14 @@ class TileGrid:
         self._flip_y = False
         self._top_left_x = 0
         self._top_left_y = 0
-        if tile_width is None:
+        if tile_width is None or tile_width == 0:
             tile_width = bitmap_width
-        if tile_height is None:
+        if tile_height is None or tile_width == 0:
             tile_height = bitmap_height
+        if tile_width < 1:
+            tile_width = 1
+        if tile_height < 1:
+            tile_height = 1
         if bitmap_width % tile_width != 0:
             raise ValueError("Tile width must exactly divide bitmap width")
         self._tile_width = tile_width
@@ -198,23 +202,18 @@ 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(
-                "P"
-            )  # pylint: disable=protected-access
-            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):
@@ -222,6 +221,9 @@ class TileGrid:
         if self._hidden:
             return
 
+        if self._bitmap.width <= 0 or self._bitmap.height <= 0:
+            return
+
         image = Image.new(
             "RGBA",
             (self._width * self._tile_width, self._height * self._tile_height),
@@ -237,12 +239,15 @@ 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(
-                    "P"
-                )  # pylint: disable=protected-access
-                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),
@@ -271,7 +276,7 @@ class TileGrid:
             y *= self._absolute_transform.dy
             x += self._absolute_transform.x
             y += self._absolute_transform.y
-        buffer.alpha_composite(image, (x, y))
+        buffer.alpha_composite(image, (int(x), int(y)))
 
     # pylint: enable=too-many-locals