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Only external bleed

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This commit is contained in:
henriquenakashima 2023-07-13 01:06:17 -04:00
parent 89e20fd61e
commit 088181085e
3 changed files with 165 additions and 73 deletions
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44
card_images.py
View file

@ -3,7 +3,7 @@ from pathlib import Path
from PIL import Image
from base_proxy import LEAVE_BLEED_INCHES
from sheet_layout import SheetLayout
from sheet_layout import SheetLayout, CardImageTransfer
W_INCHES_EXPECTED = 2.72
@ -14,28 +14,44 @@ BLEED_INCHES_EXPECTED = 0.12
class InputCardImage:
def __init__(self, path: Path):
self.path = path
self.input_dpi = None
self.original_im = None
def crop(self) -> Image:
def load(self) -> None:
with Image.open(self.path) as im:
# print(im.info)
rgb_im = im.convert('RGB')
w, h = rgb_im.width, rgb_im.height
dpi_by_w = w / W_INCHES_EXPECTED
dpi_by_h = h / H_INCHES_EXPECTED
print(f'By width dpi is {dpi_by_w} dpi')
print(f'Image is {w} x {h}, {dpi_by_w} dpi (by width)')
if dpi_by_h != dpi_by_w:
print(f'dpi by height is different: {dpi_by_h} dpi')
crop_pixels = BLEED_INCHES_EXPECTED * dpi_by_w - LEAVE_BLEED_INCHES * dpi_by_w
crop_pixels_int = round(crop_pixels)
print(f'Image is {w} x {h}, will trim {crop_pixels} pixels (rounded to {crop_pixels_int})')
print(f'By height dpi is different: {dpi_by_h} dpi')
self.input_dpi = dpi_by_w
self.original_im = im
# Crop
crop_box = (crop_pixels_int, crop_pixels_int, w - crop_pixels_int, h - crop_pixels_int)
cropped_part = rgb_im.crop(crop_box)
def get_cropped_and_resized(self, layout: SheetLayout, transfer: CardImageTransfer) -> Image:
new_dpi = layout.dpi
return cropped_part
self.load()
im = self.original_im
# Resize to match sheet DPI
new_w = layout.in_to_px(W_INCHES_EXPECTED)
new_h = layout.in_to_px(H_INCHES_EXPECTED)
im = im.resize((new_w, new_h), resample=Image.Resampling.LANCZOS)
# Crop
top_bleed, bottom_bleed, left_bleed, right_bleed = transfer.bleeds
crop_pixels_leaving_bleed = layout.in_to_px(BLEED_INCHES_EXPECTED - LEAVE_BLEED_INCHES)
crop_pixels_no_bleed = layout.in_to_px(BLEED_INCHES_EXPECTED)
top_crop = crop_pixels_leaving_bleed if top_bleed else crop_pixels_no_bleed
bottom_crop = crop_pixels_leaving_bleed if bottom_bleed else crop_pixels_no_bleed
left_crop = crop_pixels_leaving_bleed if left_bleed else crop_pixels_no_bleed
right_crop = crop_pixels_leaving_bleed if right_bleed else crop_pixels_no_bleed
# Crop
crop_box = (left_crop, top_crop, new_w - right_crop, new_h - bottom_crop)
im = im.crop(crop_box)
def get_cropped_and_resized(self, sheet_layout: SheetLayout) -> Image:
im = self.crop()
im = im.resize((sheet_layout.cropped_image_dest_w, sheet_layout.cropped_image_dest_h), resample=Image.Resampling.LANCZOS)
return im

35
crop_card.py
View file

@ -8,7 +8,7 @@ from PIL import Image, ImageDraw, ImageCms
from base_proxy import BASE_DIR
from card_images import InputCardImage
import sheet_layout
from sheet_layout import SheetLayout
from sheet_layout import SheetLayout, CardImageTransfer
import util
@ -44,16 +44,20 @@ def create_sheet(input_cards: List[InputCardImage], sheet_filepath: Path, layout
guide_thickness = layout.in_to_px(CUT_GUIDE_WIDTH_INCHES)
for x_index in range(layout.cards_per_column):
left_x = layout.left_of_column(x_index, with_bleed=False)
right_x = layout.right_of_column(x_index, with_bleed=False)
draw.line([(left_x, 0), (left_x, layout.h)], fill=color, width=guide_thickness)
draw.line([(right_x, 0), (right_x, layout.h)], fill=color, width=guide_thickness)
left_x = layout.card_area_left_xs[x_index]
right_x = layout.card_area_right_xs[x_index]
min_y = layout.min_padding
max_y = layout.h - 1 - layout.min_padding
draw.line([(left_x, min_y), (left_x, max_y)], fill=color, width=guide_thickness)
draw.line([(right_x, min_y), (right_x, max_y)], fill=color, width=guide_thickness)
for y_index in range(layout.cards_per_row):
top_y = layout.top_of_row(y_index, with_bleed=False)
bottom_y = layout.bottom_of_row(y_index, with_bleed=False)
draw.line([(0, top_y), (layout.w, top_y)], fill=color, width=guide_thickness)
draw.line([(0, bottom_y), (layout.w, bottom_y)], fill=color, width=guide_thickness)
top_y = layout.card_area_top_ys[y_index]
bottom_y = layout.card_area_bottom_ys[y_index]
min_x = layout.min_padding
max_x = layout.w - 1 - layout.min_padding
draw.line([(min_x, top_y), (max_x, top_y)], fill=color, width=guide_thickness)
draw.line([(min_x, bottom_y), (max_x, bottom_y)], fill=color, width=guide_thickness)
# Draw cards
input_cards_iter = input_cards.__iter__()
@ -64,18 +68,19 @@ def create_sheet(input_cards: List[InputCardImage], sheet_filepath: Path, layout
except StopIteration:
break
card_im = input_card.get_cropped_and_resized(layout)
sheet.paste(card_im, layout.topleft_of_card_with_bleed(y_index, x_index))
image_transfer: CardImageTransfer = layout.create_card_image_transfer(y_index, x_index)
card_im = input_card.get_cropped_and_resized(layout, image_transfer)
sheet.paste(card_im, image_transfer.topleft_dest)
# Draw internal guidelines
color = 'magenta'
guide_len = layout.in_to_px(LENGTH_CUT_GUIDE_INCHES)
# -1 because the pixels are in [0, W - 1] and [0, H - 1]
left_x = layout.left_of_column(x_index, with_bleed=False)
right_x = layout.right_of_column(x_index, with_bleed=False) - 1
top_y = layout.top_of_row(y_index, with_bleed=False)
bottom_y = layout.bottom_of_row(y_index, with_bleed=False) - 1
left_x = layout.card_area_left_xs[x_index]
right_x = layout.card_area_right_xs[x_index] - 1
top_y = layout.card_area_top_ys[y_index]
bottom_y = layout.card_area_bottom_ys[y_index] - 1
# Top left
draw.line([(left_x, top_y), (left_x, top_y + guide_len)], fill = color, width = guide_thickness)

159
sheet_layout.py
View file

@ -1,10 +1,18 @@
from typing import Tuple
import dataclasses
import math
from typing import List, Tuple
from base_proxy import CARD_W_INCHES, CARD_H_INCHES, LEAVE_BLEED_INCHES
@dataclasses.dataclass
class CardImageTransfer:
topleft_dest: Tuple[int, int]
bleeds: List[int]
class SheetLayout:
def __init__(self, dpi: int, w_inches: float, h_inches: float):
def __init__(self, dpi: int, w_inches: float, h_inches: float, internal_bleed: bool):
self.dpi = dpi
self.card_w_inches = CARD_W_INCHES
@ -17,66 +25,129 @@ class SheetLayout:
self.w = self.in_to_px(self.w_inches)
self.h = self.in_to_px(self.h_inches)
self.leave_bleed = self.in_to_px(LEAVE_BLEED_INCHES)
self.cropped_image_dest_w = self.card_w + self.leave_bleed * 2
self.cropped_image_dest_h = self.card_h + self.leave_bleed * 2
self.spacing_inches = 0.05
self.spacing_inches = 0.05 if internal_bleed else 0
self.spacing = self.in_to_px(self.spacing_inches)
self.min_padding_inches = 0.12
self.min_padding = self.in_to_px(self.min_padding_inches)
self.cards_per_row = ((self.w - self.min_padding * 2 + self.spacing)
// (self.cropped_image_dest_w + self.spacing))
self.cards_per_column = ((self.h - self.min_padding * 2 + self.spacing)
// (self.cropped_image_dest_h + self.spacing))
self.cards_per_sheet = self.cards_per_row * self.cards_per_column
paste_area_left_xs = []
paste_area_right_xs = []
card_area_left_xs = []
card_area_right_xs = []
cur_x = 0
x_index = 0
self.total_w_content = self.cropped_image_dest_w * self.cards_per_row + self.spacing * (self.cards_per_row - 1)
self.total_h_content = self.cropped_image_dest_h * self.cards_per_column + self.spacing * (self.cards_per_column - 1)
self.blank_space_w = (self.w - self.total_w_content) // 2
self.blank_space_h = (self.h - self.total_h_content) // 2
while True:
paste_area_left = cur_x
if x_index == 0 or internal_bleed:
# Left side bleed
card_area_left = cur_x + self.leave_bleed
else:
card_area_left = cur_x
card_area_right = card_area_left + self.card_w
if internal_bleed:
# Right side bleed (added to last card of row in break block)
paste_area_right = card_area_right + self.leave_bleed
else:
paste_area_right = card_area_right
if paste_area_right >= self.w - 2 * self.min_padding - (self.leave_bleed if not internal_bleed else 0):
if not internal_bleed:
# Right side bleed of previous card
paste_area_right_xs[-1] += self.leave_bleed
self.cards_per_row = x_index
self.total_w_content = paste_area_right_xs[-1]
# Center content horizontally
self.blank_space_w = (self.w - self.total_w_content) // 2
self.paste_area_left_xs = [x + self.blank_space_w for x in paste_area_left_xs]
self.paste_area_right_xs = [x + self.blank_space_w for x in paste_area_right_xs]
self.card_area_left_xs = [x + self.blank_space_w for x in card_area_left_xs]
self.card_area_right_xs = [x + self.blank_space_w for x in card_area_right_xs]
break
paste_area_left_xs.append(paste_area_left)
paste_area_right_xs.append(paste_area_right)
card_area_left_xs.append(card_area_left)
card_area_right_xs.append(card_area_right)
cur_x = paste_area_right + self.spacing
x_index += 1
paste_area_top_ys = []
paste_area_bottom_ys = []
card_area_top_ys = []
card_area_bottom_ys = []
cur_y = 0
y_index = 0
while True:
paste_area_top = cur_y
if y_index == 0 or internal_bleed:
# Top bleed
card_area_top = cur_y + self.leave_bleed
else:
card_area_top = cur_y
card_area_bottom = card_area_top + self.card_h
if internal_bleed:
# Bottom bleed (added to last card of column in break block)
paste_area_bottom = card_area_bottom + self.leave_bleed
else:
paste_area_bottom = card_area_bottom
if paste_area_bottom >= self.h - 2 * self.min_padding - (self.leave_bleed if not internal_bleed else 0):
if not internal_bleed:
# Bottom bleed of previous card
paste_area_bottom_ys[-1] += self.leave_bleed
self.cards_per_column = y_index
self.total_h_content = paste_area_bottom_ys[-1]
# Center content vertically
self.blank_space_h = (self.h - self.total_h_content) // 2
self.paste_area_top_ys = [y + self.blank_space_h for y in paste_area_top_ys]
self.paste_area_bottom_ys = [y + self.blank_space_h for y in paste_area_bottom_ys]
self.card_area_top_ys = [y + self.blank_space_h for y in card_area_top_ys]
self.card_area_bottom_ys = [y + self.blank_space_h for y in card_area_bottom_ys]
break
paste_area_top_ys.append(paste_area_top)
paste_area_bottom_ys.append(paste_area_bottom)
card_area_top_ys.append(card_area_top)
card_area_bottom_ys.append(card_area_bottom)
cur_y = paste_area_bottom + self.spacing
y_index += 1
self.cards_per_sheet = self.cards_per_row * self.cards_per_column
print(self.__dict__)
def in_to_px(self, inches: float) -> float:
return round(inches * self.dpi)
def top_of_row(self, y_index: int, with_bleed: bool) -> int:
assert 0 <= y_index < self.cards_per_column
top = self.blank_space_h + (self.cropped_image_dest_h + self.spacing) * y_index
if not with_bleed:
top += self.leave_bleed
return top
def create_card_image_transfer(self, y_index: int, x_index: int) -> CardImageTransfer:
top_row = y_index == 0
bottom_row = y_index == self.cards_per_column - 1
left_col = x_index == 0
right_col = x_index == self.cards_per_row - 1
def bottom_of_row(self, y_index: int, with_bleed: bool) -> int:
if with_bleed:
return self.top_of_row(y_index, True) + self.cropped_image_dest_h
else:
return self.top_of_row(y_index, False) + self.card_h
paste_x = self.paste_area_left_xs[x_index]
paste_y = self.paste_area_top_ys[y_index]
def left_of_column(self, x_index: int, with_bleed: bool) -> int:
assert 0 <= x_index < self.cards_per_row
left = self.blank_space_w + (self.cropped_image_dest_w + self.spacing) * x_index
if not with_bleed:
left += self.leave_bleed
return left
def right_of_column(self, x_index: int, with_bleed: bool) -> int:
if with_bleed:
return self.left_of_column(x_index, True) + self.cropped_image_dest_w
else:
return self.left_of_column(x_index, False) + self.card_w
def topleft_of_card_with_bleed(self, y_index: int, x_index: int) -> Tuple[int, int]:
x = self.left_of_column(x_index, with_bleed=True)
y = self.top_of_row(y_index, with_bleed=True)
return (x, y)
bleeds = [
self.leave_bleed if top_row else 0,
self.leave_bleed if bottom_row else 0,
self.leave_bleed if left_col else 0,
self.leave_bleed if right_col else 0]
return CardImageTransfer((paste_x, paste_y), bleeds)
def letter_portrait_3x3_sheet_layout() -> SheetLayout:
return SheetLayout(1200, 8.5, 11)
return SheetLayout(1200, 8.5, 11, False)
def letter_landscape_2x4_sheet_layout() -> SheetLayout:
return SheetLayout(1200, 11, 8.5)
return SheetLayout(1200, 11, 8.5, False)