From cb54555bd24970c16998f84bf9845f5f719f7085 Mon Sep 17 00:00:00 2001 From: foamyguy Date: Fri, 7 Oct 2022 17:29:11 -0500 Subject: [PATCH] adding blit implementation to Bitmap --- displayio/_bitmap.py | 41 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) diff --git a/displayio/_bitmap.py b/displayio/_bitmap.py index 9d06a63..12e20af 100644 --- a/displayio/_bitmap.py +++ b/displayio/_bitmap.py @@ -131,7 +131,46 @@ class Bitmap: ) -> None: # pylint: disable=unnecessary-pass, invalid-name """Inserts the source_bitmap region defined by rectangular boundaries""" - pass + 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 -- 2.49.0