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[preview] Preserve aspect ratio while scaling

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This commit is contained in:
Philipp Hörist
2017-11-26 13:38:18 +01:00
parent 887d278d0a
commit 1d17a08659
2 changed files with 22 additions and 5 deletions
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1
url_image_preview/resize_gif.py
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@@ -74,6 +74,7 @@ def extract_and_resize_frames(mem, resize_to):
new_frame.paste(image, (0, 0), image.convert('RGBA'))
# This method preservs aspect ratio
new_frame.thumbnail(resize_to, Image.ANTIALIAS)
frames.append(new_frame)

26
url_image_preview/url_image_preview.py
View File

@@ -279,18 +279,17 @@ class Base(object):
try:
self._create_path(os.path.dirname(thumbpath))
height, width = pixbuf.get_height(), pixbuf.get_width()
thumbnail = pixbuf
if isinstance(pixbuf, GdkPixbuf.PixbufAnimation):
if size <= height and size <= width:
if size < pixbuf.get_width() or size < pixbuf.get_height():
resize_gif(mem, thumbpath, (size, size))
thumbnail = self._load_thumbnail(thumbpath)
else:
self._write_file(thumbpath, mem)
else:
if size <= height and size <= width:
thumbnail = pixbuf.scale_simple(
size, size, GdkPixbuf.InterpType.BILINEAR)
width, height = self._get_thumbnail_size(pixbuf, size)
thumbnail = pixbuf.scale_simple(
width, height, GdkPixbuf.InterpType.BILINEAR)
thumbnail.savev(thumbpath, 'png', [], [])
except Exception as error:
dialogs.ErrorDialog(
@@ -303,6 +302,23 @@ class Base(object):
return
return thumbnail
@staticmethod
def _get_thumbnail_size(pixbuf, size):
# Calculates the new thumbnail size while preserving the aspect ratio
image_width = pixbuf.get_width()
image_height = pixbuf.get_height()
if image_width > image_height:
if image_width > size:
image_height = int(size / float(image_width) * image_height)
image_width = int(size)
else:
if image_height > size:
image_width = int(size / float(image_height) * image_width)
image_height = int(size)
return image_width, image_height
@staticmethod
def _load_thumbnail(thumbpath):
ext = os.path.splitext(thumbpath)[1]