def canvas_size(image,
new_size,
centering,
background_color,
opacity,
old_size=None):
#because of layer support photo size can be different from image layer size
if old_size is None:
old_size = image.size
#check if image size has changed
if old_size == new_size:
return image
#displacement
dx = new_size[0] - old_size[0]
dy = new_size[1] - old_size[1]
#alignment
x = int(centering[0] * dx / 100.0)
y = int(centering[1] * dy / 100.0)
#mode
if image.mode in ['RGBA', 'LA', 'P']:
if image.mode != 'RGBA':
image = image.convert('RGBA')
background_color = HTMLColorToRGBA(background_color, opacity)
if image.mode in ['RGB', 'RGBA']:
new_canvas = Image.new(image.mode, new_size, background_color)
else:
new_canvas = Image.new('RGB', new_size, background_color)
if opacity > 0:
imtools.paste(new_canvas, image, (x, y), mask=image)
else:
imtools.paste(new_canvas, image, (x, y), force=True)
return new_canvas
def perspective(image, width, height, skew_x, skew_y, offset_x, offset_y, left,
top, back_color, opacity, resample, crop, transpose):
image = imtools.convert_safe_mode(image)
if transpose == 'NONE':
transpose = None
else:
transpose = getattr(Image, transpose)
image = image.transpose(imtools.get_reverse_transposition(transpose))
if opacity != 100 or back_color != '#000000':
image = image.convert('RGBA')
if width != 0:
width = 1 / width
if height != 0:
height = 1 / height
offset_x = offset_x * width
offset_y = offset_y * height
skew_x = math.tan(r(skew_x))
skew_y = math.tan(r(skew_y))
matrix = (width, skew_x, offset_x, skew_y, height, offset_y, left, top)
perspectived = image.transform(image.size, Image.PERSPECTIVE, matrix,
resample)
result = imtools.fill_background_color(
perspectived, HTMLColorToRGBA(back_color, (255 * opacity) / 100))
if crop:
result = imtools.auto_crop(result)
if not (transpose is None):
result = result.transpose(transpose)
return result
def rotate(image, angle, resample_image, expand=0, amount=100,
background_color='#000000', background_opacity=100):
resample_image = getattr(Image, resample_image)
if background_opacity != 100 or background_color != '#000000':
image = image.convert('RGBA')
rotated = image.rotate(angle, resample_image, expand)
rgba = HTMLColorToRGBA(background_color,
255 * background_opacity / 100)
rotated = imtools.fill_background_color(rotated, rgba)
if amount < 100:
rotated = imtools.blend(image, rotated, amount / 100.0, rgba)
return rotated
def put_border(image, size, offset, contour_color, fill_color, opacity,
include_image):
if opacity < 100:
fill_color = HTMLColorToRGBA(fill_color, (255 * opacity) / 100)
if not include_image:
w, h = image.size
image = Image.new('RGBA', (w + 2 * offset, h + 2 * offset), fill_color)
else:
image = image.convert('RGBA')
image = ImageOps.expand(image, border=offset, fill=fill_color)
image = ImageOps.expand(image, border=size, fill=contour_color)
return image
def reflect(image,
depth,
opacity,
background_color,
background_opacity,
scale_method,
gap=0,
scale_reflection=False,
blur_reflection=False,
cache=None):
if has_transparency(image):
image = image.convert('RGBA')
else:
image = image.convert('RGB')
if cache is None:
cache = {}
opacity = (255 * opacity) / 100
background_opacity = (255 * background_opacity) / 100
scale_method = getattr(Image, scale_method)
if background_opacity == 255:
mode = 'RGB'
color = background_color
else:
mode = 'RGBA'
color = HTMLColorToRGBA(background_color, background_opacity)
width, height = image.size
depth = min(height, depth)
#make reflection
if has_alpha(image) and background_opacity > 0:
reflection = Image.new(mode, image.size, color)
paste(reflection, image, (0, 0), image)
else:
reflection = image
reflection = reflection.transpose(Image.FLIP_TOP_BOTTOM)
if scale_reflection:
reflection = reflection.resize((width, depth), scale_method)
else:
reflection = reflection.crop((0, 0, width, depth))
if blur_reflection:
reflection = reflection.filter(ImageFilter.BLUR)
mask = gradient_mask((width, depth), opacity, cache)
#composite
total_size = (width, height + gap + depth)
total = Image.new(mode, total_size, color)
paste(total, image, (0, 0), image)
paste(total, reflection, (0, height + gap), mask)
return total
def background(image,
fill,
mark,
color,
horizontal_offset=None,
vertical_offset=None,
horizontal_justification=None,
vertical_justification=None,
orientation=None,
method=None,
opacity=100):
if not has_transparency(image):
return image
if image.mode == 'P':
image = image.convert('RGBA')
if fill == FILL_CHOICES[0]:
opacity = (255 * opacity) / 100
return fill_background_color(image, HTMLColorToRGBA(color, opacity))
elif fill == FILL_CHOICES[1]:
layer = generate_layer(image.size, mark, method, horizontal_offset,
vertical_offset, horizontal_justification,
vertical_justification, orientation, opacity)
paste(layer, image, mask=image)
return layer
def color_to_alpha(image, color_value=None, select_color_by=None):
image = image.convert('RGBA')
width, height = image.size
select = select_color_by
color = color_value
if select == OPTIONS[0]:
color = HTMLColorToRGBA(color, 255)
elif select == OPTIONS[1]:
color = image.getpixel((0, 0))
elif select == OPTIONS[2]:
color = image.getpixel((width - 1, 0))
elif select == OPTIONS[3]:
color = image.getpixel((0, height - 1))
elif select == OPTIONS[4]:
color = image.getpixel((width - 1, height - 1))
else:
return image
if color[3] == 0:
# The selected color is transparent
return image
color = map(float, color)
img_bands = [band.convert("F") for band in imtools.split(image)]
# Find the maximum difference rate between source and color.
# I had to use two difference functions because ImageMath.eval
# only evaluates the expression once.
alpha = ImageMath.eval("""float(
max(
max(
max(
difference1(red_band, cred_band),
difference1(green_band, cgreen_band)
),
difference1(blue_band, cblue_band)
),
max(
max(
difference2(red_band, cred_band),
difference2(green_band, cgreen_band)
),
difference2(blue_band, cblue_band)
)
)
)""",
difference1=difference1,
difference2=difference2,
red_band=img_bands[0],
green_band=img_bands[1],
blue_band=img_bands[2],
cred_band=color[0],
cgreen_band=color[1],
cblue_band=color[2])
# Calculate the new image colors after the removal of the selected color
new_bands = [
ImageMath.eval("convert((image - color) / alpha + color, 'L')",
image=img_bands[i],
color=color[i],
alpha=alpha) for i in xrange(3)
]
# Add the new alpha band
new_bands.append(
ImageMath.eval("convert(alpha_band * alpha, 'L')",
alpha=alpha,
alpha_band=img_bands[3]))
return Image.merge('RGBA', new_bands)
