X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;f=bookmaker.py;h=1c7240a8fd8c5d29d6357d57e54a2affee2e65b4;hb=71280964e196003c0198eb3c418f28ec32f5be78;hp=25e85994f125b785fbe3537cf84fce0a75cdd599;hpb=2180d2073c33449159b2bf4ff0289ab809ae2f95;p=misc
diff --git a/bookmaker.py b/bookmaker.py
index 25e8599..1c7240a 100755
--- a/bookmaker.py
+++ b/bookmaker.py
@@ -73,15 +73,21 @@ try:
except ImportError:
handled_error_exit("Can't run at all without pypdf installed.")
-# some constants
+# some general paper geometry constants
POINTS_PER_CM = 10 * 72 / 25.4
A4_WIDTH = 21 * POINTS_PER_CM
A4_HEIGHT = 29.7 * POINTS_PER_CM
A4 = (A4_WIDTH, A4_HEIGHT)
+
+# constants specifically for --nup4
+A4_HALF_WIDTH = A4_WIDTH / 2
+A4_HALF_HEIGHT = A4_HEIGHT / 2
CUT_DEPTH = 1.95 * POINTS_PER_CM
CUT_WIDTH = 1.05 * POINTS_PER_CM
MIDDLE_POINT_DEPTH = 0.4 * POINTS_PER_CM
SPINE_LIMIT = 1 * POINTS_PER_CM
+QUARTER_SCALE_FACTOR = 0.5
+PAGE_ORDER = (3,0,7,4,1,2,5,6)
# some helpers
class HandledException(Exception):
@@ -138,6 +144,15 @@ def parse_page_range(range_string, pages):
end_page = int(end)
return start_page, end_page
+def draw_cut(canvas, x_spine_limit, direction):
+ outer_start_x = x_spine_limit - 0.5 * CUT_WIDTH * direction
+ inner_start_x = x_spine_limit + 0.5 * CUT_WIDTH * direction
+ middle_point_y = A4_HALF_HEIGHT + MIDDLE_POINT_DEPTH * direction
+ end_point_y = A4_HALF_HEIGHT + CUT_DEPTH * direction
+ canvas.line(inner_start_x, A4_HALF_HEIGHT, x_spine_limit, end_point_y)
+ canvas.line(x_spine_limit, end_point_y, x_spine_limit, middle_point_y)
+ canvas.line(x_spine_limit, middle_point_y, outer_start_x, A4_HALF_HEIGHT)
+
def parse_args():
parser = argparse.ArgumentParser(description=__doc__, epilog=help_epilogue, formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument("-i", "--input_file", action="append", required=True, help="input PDF file")
@@ -317,17 +332,14 @@ def main():
print(f"built page number {i+1} (of {len(pages_to_add)})")
else:
+ # --nup4 output
print("-n: building 4-input-pages-per-output-page book")
print(f"-m: applying printable-area margin of {args.print_margin}cm")
if args.analyze:
print("-a: drawing page borders, spine limits")
- n_pages_per_axis = 2
printable_margin = args.print_margin * POINTS_PER_CM
- printable_scale = (A4_WIDTH - 2*printable_margin)/A4_WIDTH
- half_width = A4_WIDTH / n_pages_per_axis
- half_height = A4_HEIGHT / n_pages_per_axis
- section_scale_factor = 1 / n_pages_per_axis
- spine_part_of_page = (SPINE_LIMIT / half_width) / printable_scale
+ printable_scale = (A4_WIDTH - 2 * printable_margin)/A4_WIDTH
+ spine_part_of_page = (SPINE_LIMIT / A4_HALF_WIDTH) / printable_scale
bonus_shrink_factor = 1 - spine_part_of_page
new_page_order = []
new_i_order = []
@@ -341,23 +353,10 @@ def main():
i += 1
if i == 8:
i = 0
- new_i_order += [8 * n_eights + 3,
- 8 * n_eights + 0,
- 8 * n_eights + 7,
- 8 * n_eights + 4,
- 8 * n_eights + 1,
- 8 * n_eights + 2,
- 8 * n_eights + 5,
- 8 * n_eights + 6]
+ for n in PAGE_ORDER:
+ new_i_order += [8 * n_eights + n]
+ new_page_order += [eight_pack[n]]
n_eights += 1
- new_page_order += [eight_pack[3]] # page front, upper left
- new_page_order += [eight_pack[0]] # page front, upper right
- new_page_order += [eight_pack[7]] # page front, lower left
- new_page_order += [eight_pack[4]] # page front, lower right
- new_page_order += [eight_pack[1]] # page back, upper left
- new_page_order += [eight_pack[2]] # page back, upper right
- new_page_order += [eight_pack[5]] # page back, lower left
- new_page_order += [eight_pack[6]] # page back, lower right
i = 0
page_count = 0
front_page = True
@@ -382,23 +381,23 @@ def main():
page.add_transformation(pypdf.Transformation().translate(ty=(1-bonus_shrink_factor)*A4_HEIGHT))
if i == 0 or i == 1:
y_section = A4_HEIGHT
- page.mediabox.bottom = half_height
+ page.mediabox.bottom = A4_HALF_HEIGHT
page.mediabox.top = A4_HEIGHT
if i == 2 or i == 3:
y_section = 0
page.mediabox.bottom = 0
- page.mediabox.top = half_height
+ page.mediabox.top = A4_HALF_HEIGHT
if i == 0 or i == 2:
x_section = 0
page.mediabox.left = 0
- page.mediabox.right = half_width
+ page.mediabox.right = A4_HALF_WIDTH
if i == 1 or i == 3:
page.add_transformation(pypdf.Transformation().translate(tx=(1-bonus_shrink_factor)*A4_WIDTH))
x_section = A4_WIDTH
- page.mediabox.left = half_width
+ page.mediabox.left = A4_HALF_WIDTH
page.mediabox.right = A4_WIDTH
page.add_transformation(pypdf.Transformation().translate(tx=x_section, ty=y_section))
- page.add_transformation(pypdf.Transformation().scale(section_scale_factor, section_scale_factor))
+ page.add_transformation(pypdf.Transformation().scale(QUARTER_SCALE_FACTOR, QUARTER_SCALE_FACTOR))
new_page.merge_page(page)
page_count += 1
print(f"merged page number {page_count} (of {len(pages_to_add)})")
@@ -410,10 +409,10 @@ def main():
c = reportlab.pdfgen.canvas.Canvas(packet, pagesize=A4)
c.setLineWidth(0.1)
c.line(0, A4_HEIGHT, A4_WIDTH, A4_HEIGHT)
- c.line(0, half_height, A4_WIDTH, half_height)
+ c.line(0, A4_HALF_HEIGHT, A4_WIDTH, A4_HALF_HEIGHT)
c.line(0, 0, A4_WIDTH, 0)
c.line(0, A4_HEIGHT, 0, 0)
- c.line(half_width, A4_HEIGHT, half_width, 0)
+ c.line(A4_HALF_WIDTH, A4_HEIGHT, A4_HALF_WIDTH, 0)
c.line(A4_WIDTH, A4_HEIGHT, A4_WIDTH, 0)
c.save()
new_pdf = pypdf.PdfReader(packet)
@@ -422,34 +421,20 @@ def main():
printable_offset_y = printable_margin * A4_HEIGHT / A4_WIDTH
new_page.add_transformation(pypdf.Transformation().scale(printable_scale, printable_scale))
new_page.add_transformation(pypdf.Transformation().translate(tx=printable_offset_x, ty=printable_offset_y))
- x_left_SPINE_LIMIT = half_width * bonus_shrink_factor
- x_right_SPINE_LIMIT = A4_WIDTH - x_left_SPINE_LIMIT
+ x_left_spine_limit = A4_HALF_WIDTH * bonus_shrink_factor
+ x_right_spine_limit = A4_WIDTH - x_left_spine_limit
if args.analyze or front_page:
packet = io.BytesIO()
c = reportlab.pdfgen.canvas.Canvas(packet, pagesize=A4)
if args.analyze:
# spine lines
c.setLineWidth(0.1)
- c.line(x_left_SPINE_LIMIT, A4_HEIGHT, x_left_SPINE_LIMIT, 0)
- c.line(x_right_SPINE_LIMIT, A4_HEIGHT, x_right_SPINE_LIMIT, 0)
+ c.line(x_left_spine_limit, A4_HEIGHT, x_left_spine_limit, 0)
+ c.line(x_right_spine_limit, A4_HEIGHT, x_right_spine_limit, 0)
if front_page:
c.setLineWidth(0.2)
- # cut upper left
- start_up_left_left_x = x_left_SPINE_LIMIT - 0.5 * CUT_WIDTH
- start_up_left_right_x = x_left_SPINE_LIMIT + 0.5 * CUT_WIDTH
- middle_point_up_left_y = half_height + MIDDLE_POINT_DEPTH
- end_point_up_left_y = half_height + CUT_DEPTH
- c.line(start_up_left_right_x, half_height, x_left_SPINE_LIMIT, end_point_up_left_y)
- c.line(x_left_SPINE_LIMIT, end_point_up_left_y, x_left_SPINE_LIMIT, middle_point_up_left_y)
- c.line(x_left_SPINE_LIMIT, middle_point_up_left_y, start_up_left_left_x, half_height)
- # cut lower right
- start_down_right_left_x = x_right_SPINE_LIMIT - 0.5 * CUT_WIDTH
- start_down_right_right_x = x_right_SPINE_LIMIT + 0.5 * CUT_WIDTH
- middle_point_down_right_y = half_height - MIDDLE_POINT_DEPTH
- end_point_down_right_y = half_height - CUT_DEPTH
- c.line(start_down_right_left_x, half_height, x_right_SPINE_LIMIT, end_point_down_right_y)
- c.line(x_right_SPINE_LIMIT, end_point_down_right_y, x_right_SPINE_LIMIT, middle_point_down_right_y)
- c.line(x_right_SPINE_LIMIT, middle_point_down_right_y, start_down_right_right_x, half_height)
+ draw_cut(c, x_left_spine_limit, (1))
+ draw_cut(c, x_right_spine_limit, (-1))
if args.analyze or front_page:
c.save()
new_pdf = pypdf.PdfReader(packet)