def draw_histogram(self, height: int = 170, fill: int = 170):
"""
Draw a histogram (RGB) from self.__pixbuf and return it as another pixbuf.
:param height: height of the returned pixbuf
:param fill: determines the color intensity of the filled graphs,
valid values are between 0 and 255.
:returns: modified pixbuf, the returned prixbuf will be 262x<height> px.
"""
self.__pixbuf = ImageTools.static_image(self.__pixbuf)
im = Image.new('RGB', (258, height - 4), (30, 30, 30))
hist_data = ImageTools.pixbuf_to_pil(self.__pixbuf).histogram()
maximum = max(hist_data[:768] + [1])
y_scale = (height - 6) / maximum
r = [int(hist_data[n] * y_scale) for n in range(256)]
g = [int(hist_data[n] * y_scale) for n in range(256, 512)]
b = [int(hist_data[n] * y_scale) for n in range(512, 768)]
im_data = im.getdata()
# Draw the filling colors
for x in range(256):
for y in range(1, max(r[x], g[x], b[x]) + 1):
r_px = fill if y <= r[x] else 0
g_px = fill if y <= g[x] else 0
b_px = fill if y <= b[x] else 0
im_data.putpixel((x + 1, height - 5 - y), (r_px, g_px, b_px))
# Draw the outlines
for x in range(1, 256):
self._im_putpixel(x=x, channel=r, height=height, im_data=im_data)
self._im_putpixel(x=x, channel=g, height=height, im_data=im_data)
self._im_putpixel(x=x, channel=b, height=height, im_data=im_data)
if config['ENHANCE_EXTRA']:
# if True a label with the maximum pixel value will be added to one corner
maxstr = f'max pixel value: {maximum}'
draw = ImageDraw.Draw(im)
draw.rectangle((0, 0, len(maxstr) * 6 + 2, 10), fill=(30, 30, 30))
draw.text((2, 0), maxstr, fill=(255, 255, 255))
im = ImageOps.expand(im, 1, (80, 80, 80))
im = ImageOps.expand(im, 1, (0, 0, 0))
self.__hist_image.set_from_pixbuf(ImageTools.pil_to_pixbuf(im))
def _add_subpixbuf(self, canvas, x: int, y: int, image_size: tuple, source_pixbuf):
"""
Copy a subpixbuf from <source_pixbuf> to <canvas> as it should
be in the lens if the coordinates <x>, <y> are the mouse pointer
position on the main window layout area.
The displayed image (scaled from the <source_pixbuf>) must have
size <image_size>
"""
# Prevent division by zero exceptions further down
if not image_size[0]:
return
# FIXME This merely prevents Errors being raised if source_pixbuf is an
# animation. The result might be broken, though, since animation,
# rotation etc. might not match or will be ignored:
source_pixbuf = ImageTools.static_image(source_pixbuf)
rotation = config['ROTATION']
if config['AUTO_ROTATE_FROM_EXIF']:
rotation += ImageTools.get_implied_rotation(source_pixbuf)
rotation %= 360
if rotation in (90, 270):
scale = source_pixbuf.get_height() / image_size[0]
else:
scale = source_pixbuf.get_width() / image_size[0]
x *= scale
y *= scale
source_mag = config['LENS_MAGNIFICATION'] / scale
width = height = config['LENS_SIZE'] / source_mag
paste_left = x > width / 2
paste_top = y > height / 2
dest_x = max(0, int(math.ceil((width / 2 - x) * source_mag)))
dest_y = max(0, int(math.ceil((height / 2 - y) * source_mag)))
if rotation == 90:
x, y = y, source_pixbuf.get_height() - x
elif rotation == 180:
x = source_pixbuf.get_width() - x
y = source_pixbuf.get_height() - y
elif rotation == 270:
x, y = source_pixbuf.get_width() - y, x
if config['HORIZONTAL_FLIP']:
if rotation in (90, 270):
y = source_pixbuf.get_height() - y
else:
x = source_pixbuf.get_width() - x
if config['VERTICAL_FLIP']:
if rotation in (90, 270):
x = source_pixbuf.get_width() - x
else:
y = source_pixbuf.get_height() - y
src_x = x - width / 2
src_y = y - height / 2
if src_x < 0:
width += src_x
src_x = 0
if src_y < 0:
height += src_y
src_y = 0
width = max(0, min(source_pixbuf.get_width() - src_x, width))
height = max(0, min(source_pixbuf.get_height() - src_y, height))
if width < 1 or height < 1:
return
subpixbuf = source_pixbuf.new_subpixbuf(int(src_x), int(src_y), int(width), int(height))
subpixbuf = subpixbuf.scale_simple(
int(math.ceil(source_mag * subpixbuf.get_width())),
int(math.ceil(source_mag * subpixbuf.get_height())),
config['SCALING_QUALITY'])
if rotation == 0:
subpixbuf = subpixbuf.rotate_simple(GdkPixbuf.PixbufRotation.NONE)
elif rotation == 90:
subpixbuf = subpixbuf.rotate_simple(GdkPixbuf.PixbufRotation.CLOCKWISE)
elif rotation == 180:
subpixbuf = subpixbuf.rotate_simple(GdkPixbuf.PixbufRotation.UPSIDEDOWN)
elif rotation == 270:
subpixbuf = subpixbuf.rotate_simple(GdkPixbuf.PixbufRotation.COUNTERCLOCKWISE)
if config['HORIZONTAL_FLIP']:
subpixbuf = subpixbuf.flip(horizontal=True)
if config['VERTICAL_FLIP']:
subpixbuf = subpixbuf.flip(horizontal=False)
subpixbuf = self.__window.enhancer.enhance(subpixbuf)
if paste_left:
dest_x = 0
else:
dest_x = min(canvas.get_width() - subpixbuf.get_width(), dest_x)
if paste_top:
dest_y = 0
else:
dest_y = min(canvas.get_height() - subpixbuf.get_height(), dest_y)
if subpixbuf.get_has_alpha() and config['CHECKERED_BG_FOR_TRANSPARENT_IMAGES']:
subpixbuf = subpixbuf.composite_color_simple(subpixbuf.get_width(), subpixbuf.get_height(),
GdkPixbuf.InterpType.NEAREST, 255, 8, 0x777777, 0x999999)
subpixbuf.copy_area(0, 0, subpixbuf.get_width(), subpixbuf.get_height(), canvas, dest_x, dest_y)
def _add_subpixbuf(self, canvas, x: int, y: int, image_size: tuple, source_pixbuf):
"""
Copy a subpixbuf from <source_pixbuf> to <canvas> as it should
be in the lens if the coordinates <x>, <y> are the mouse pointer
position on the main window layout area.
The displayed image (scaled from the <source_pixbuf>) must have
size <image_size>
"""
# Prevent division by zero exceptions further down
if not image_size[0]:
return
# FIXME This merely prevents Errors being raised if source_pixbuf is an
# animation. The result might be broken, though, since animation,
# rotation etc. might not match or will be ignored:
source_pixbuf = ImageTools.static_image(source_pixbuf)
rotation = config['ROTATION']
if config['AUTO_ROTATE_FROM_EXIF']:
rotation += ImageTools.get_implied_rotation(source_pixbuf)
rotation %= 360
if rotation in (90, 270):
scale = source_pixbuf.get_height() / image_size[0]
else:
scale = source_pixbuf.get_width() / image_size[0]
x *= scale
y *= scale
source_mag = config['LENS_MAGNIFICATION'] / scale
width = height = config['LENS_SIZE'] / source_mag
paste_left = x > width / 2
paste_top = y > height / 2
dest_x = max(0, int(math.ceil((width / 2 - x) * source_mag)))
dest_y = max(0, int(math.ceil((height / 2 - y) * source_mag)))
match rotation:
case 90:
x, y = y, source_pixbuf.get_height() - x
case 180:
x = source_pixbuf.get_width() - x
y = source_pixbuf.get_height() - y
case 270:
x, y = source_pixbuf.get_width() - y, x
src_x = x - width / 2
src_y = y - height / 2
if src_x < 0:
width += src_x
src_x = 0
if src_y < 0:
height += src_y
src_y = 0
width = max(0, min(source_pixbuf.get_width() - src_x, width))
height = max(0, min(source_pixbuf.get_height() - src_y, height))
if width < 1 or height < 1:
return
subpixbuf = source_pixbuf.new_subpixbuf(int(src_x), int(src_y), int(width), int(height))
subpixbuf = subpixbuf.scale_simple(
int(math.ceil(source_mag * subpixbuf.get_width())),
int(math.ceil(source_mag * subpixbuf.get_height())),
config['GDK_SCALING_FILTER'])
subpixbuf = ImageTools.rotate_pixbuf(subpixbuf, rotation)
subpixbuf = ImageTools.enhance(subpixbuf)
if paste_left:
dest_x = 0
else:
dest_x = min(canvas.get_width() - subpixbuf.get_width(), dest_x)
if paste_top:
dest_y = 0
else:
dest_y = min(canvas.get_height() - subpixbuf.get_height(), dest_y)
if subpixbuf.get_has_alpha():
subpixbuf = ImageTools.add_alpha_background(subpixbuf, subpixbuf.get_width(), subpixbuf.get_height())
subpixbuf.copy_area(0, 0, subpixbuf.get_width(), subpixbuf.get_height(), canvas, dest_x, dest_y)