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Allow embedded image location to be erased before placing image #337

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Allow embedded image location to be erased before placing image #337

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21 changes: 20 additions & 1 deletion qrcode/image/styledpil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,8 @@ def __init__(self, *args, **kwargs):
)
if not self.embeded_image and embeded_image_path:
self.embeded_image = Image.open(embeded_image_path)
self.embeded_image_overwrite = kwargs.get("embeded_image_overwrite", False)


# the paint_color is the color the module drawer will use to draw upon
# a canvas During the color mask process, pixels that are paint_color
Expand Down Expand Up @@ -87,7 +89,14 @@ def draw_embeded_image(self):
return
total_width, _ = self._img.size
total_width = int(total_width)
logo_width_ish = int(total_width / 4)

logo_divider = 4

if self.embeded_image_overwrite:
# if we're doing this destructive thing to the QR code, better to make it smaller to increase chances of not breaking it
logo_divider = 8

logo_width_ish = int(total_width / logo_divider)
logo_offset = (
int((int(total_width / 2) - int(logo_width_ish / 2)) / self.box_size)
* self.box_size
Expand All @@ -97,8 +106,18 @@ def draw_embeded_image(self):
region = self.embeded_image
region = region.resize((logo_width, logo_width), self.embeded_image_resample)
if "A" in region.getbands():
if self.embeded_image_overwrite:
# "erase" the logo region using background color and apply the embedded image on top
embed_backing_region = Image.new(region.mode, region.size, self.color_mask.back_color)
self._img.alpha_composite(embed_backing_region, logo_position)

self._img.alpha_composite(region, logo_position)
else:
if self.embeded_image_overwrite:
# "erase" the logo region using background color and apply the embedded image on top
embed_backing_region = Image.new(region.mode, region.size, self.color_mask.back_color)
self._img.paste(embed_backing_region, logo_position)

self._img.paste(region, logo_position)

def save(self, stream, format=None, **kwargs):
Expand Down