Fewer bugs, more code, shape done

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

diff --git a/displayio/_bitmap.py b/displayio/_bitmap.py
index 08b383ec92b5e9aeda1fb0422127916e5d2033c1..03dd75bf483c8f0e17e1910470156114fa591d9e 100644 (file)
--- a/displayio/_bitmap.py
+++ b/displayio/_bitmap.py
@@ -21,6 +21,7 @@ from __future__ import annotations
 from typing import Union, Tuple
 from PIL import Image
 from ._structs import RectangleStruct
+from ._area import Area
 
 __version__ = "0.0.0+auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_Blinka_displayio.git"
@@ -76,6 +77,9 @@ class Bitmap:
 
         if x > self._image.width or y > self._image.height:
             raise ValueError(f"Index {index} is out of range")
+        return self._get_pixel(x, y)
+
+    def _get_pixel(self, x: int, y: int) -> int:
         return self._image.getpixel((x, y))
 
     def __setitem__(self, index: Union[Tuple[int, int], int], value: int) -> None:
@@ -129,14 +133,71 @@ class Bitmap:
         y2: int,
         skip_index: int,
     ) -> None:
-        # pylint: disable=unnecessary-pass, invalid-name
         """Inserts the source_bitmap region defined by rectangular boundaries"""
-        pass
+        # pylint: disable=invalid-name
+        if x2 is None:
+            x2 = source_bitmap.width
+        if y2 is None:
+            y2 = source_bitmap.height
+
+        # Rearrange so that x1 < x2 and y1 < y2
+        if x1 > x2:
+            x1, x2 = x2, x1
+        if y1 > y2:
+            y1, y2 = y2, y1
+
+        # Ensure that x2 and y2 are within source bitmap size
+        x2 = min(x2, source_bitmap.width)
+        y2 = min(y2, source_bitmap.height)
+
+        for y_count in range(y2 - y1):
+            for x_count in range(x2 - x1):
+                x_placement = x + x_count
+                y_placement = y + y_count
+
+                if (self.width > x_placement >= 0) and (
+                    self.height > y_placement >= 0
+                ):  # ensure placement is within target bitmap
+                    # get the palette index from the source bitmap
+                    this_pixel_color = source_bitmap[
+                        y1
+                        + (
+                            y_count * source_bitmap.width
+                        )  # Direct index into a bitmap array is speedier than [x,y] tuple
+                        + x1
+                        + x_count
+                    ]
+
+                    if (skip_index is None) or (this_pixel_color != skip_index):
+                        self[  # Direct index into a bitmap array is speedier than [x,y] tuple
+                            y_placement * self.width + x_placement
+                        ] = this_pixel_color
+                elif y_placement > self.height:
+                    break
 
     def dirty(self, x1: int = 0, y1: int = 0, x2: int = -1, y2: int = -1) -> None:
-        # pylint: disable=unnecessary-pass, invalid-name
         """Inform displayio of bitmap updates done via the buffer protocol."""
-        pass
+        # pylint: disable=invalid-name
+        if x2 == -1:
+            x2 = self._bmp_width
+        if y2 == -1:
+            y2 = self._bmp_height
+        area = Area(x1, y1, x2, y2)
+        area.canon()
+        area.union(self._dirty_area, area)
+        bitmap_area = Area(0, 0, self._bmp_width, self._bmp_height)
+        area.compute_overlap(bitmap_area, self._dirty_area)
+
+    def _finish_refresh(self):
+        if self._read_only:
+            return
+        self._dirty_area.x1 = 0
+        self._dirty_area.x2 = 0
+
+    def _get_refresh_areas(self, areas: list[Area]) -> None:
+        if self._dirty_area.x1 == self._dirty_area.x2 or self._read_only:
+            return
+        areas.append(self._dirty_area)
 
     @property
     def width(self) -> int: