Cairo - Versionsgeschichte

F: /* Cairo - erstelle ein pdf in python */

2013-11-26T17:22:34Z

Cairo - erstelle ein pdf in python

← Nächstältere Version		Version vom 26. November 2013, 17:22 Uhr
Zeile 3:		Zeile 3:
	= Beispiele =		= Beispiele =
	== Cairo - erstelle ein pdf in python ==		== Cairo - erstelle ein pdf in python ==

			folgender Code
			* erstellt eine pdf Datei ''pdf_output'',
			* liest ein Bild ''imagename'' ein
			* positioniert dieses auf der ersten Seite
			* nimmt das eingelesene Bild und positioniert es als Referenz auf ''pdf_pages'' Seiten

	<source lang="python">		<source lang="python">
	#!/usr/bin/env python		#!/usr/bin/env python
	~~#import os~~
	~~#import sys~~
	~~#import optparse~~
	~~#import io~~
	~~#import base64~~
	~~#import gzip~~


	try:		try:
Zeile 19:		Zeile 19:

	pdf_output = 'test.pdf'		pdf_output = 'test.pdf'
			pdf_pages =430
	pdf_width = 596.590909091		pdf_width = 596.590909091
	pdf_height = 843.75		pdf_height = 843.75
	imagename = '/home/dev/CairoSVG/img_65.jpg'		imagename = '/home/dev/CairoSVG/img_65.jpg'
	~~#imagename = '/home/dev/CairoSVG/img_65_small.jpg'~~
	image_x = 0		image_x = 0
	image_y = 0		image_y = 0
Zeile 28:		Zeile 28:
	print '- erstelle pdf', pdf_output, 'w:', pdf_width, 'h:', pdf_height		print '- erstelle pdf', pdf_output, 'w:', pdf_width, 'h:', pdf_height
	cairo_surface = cairo.PDFSurface(pdf_output, pdf_width, pdf_height)		cairo_surface = cairo.PDFSurface(pdf_output, pdf_width, pdf_height)
			print ' ... ', cairo_surface

	print '- lese Bild ', imagename		print '- lese Bild von Datei ', imagename
	input_ = open(imagename, 'rb') ~~# filename~~		input_ = open(imagename, 'rb')
	image_bytes = input_.read()		image_bytes = input_.read()
	from io import BytesIO		from io import BytesIO
Zeile 37:		Zeile 38:
	Image.open(BytesIO(image_bytes)).save(png_file, 'PNG')		Image.open(BytesIO(image_bytes)).save(png_file, 'PNG')
	png_file.seek(0)		png_file.seek(0)
			print ' ... ', png_file

			print '- lade Bild in Cairobiliothek'
	image_surface = cairo.ImageSurface.create_from_png(png_file)		image_surface = cairo.ImageSurface.create_from_png(png_file)
	image_width_original = image_surface.get_width()		image_width_original, image_height_original = image_surface.get_width(), image_surface.get_height()
	~~image_height_original =~~ image_surface.get_height()		image_scale_x, image_scale_y = pdf_width/image_width_original, pdf_height/image_height_original
	image_scale_x = pdf_width / image_width_original		print ' ... image original: ', image_width_original, image_height_original, image_scale_x, image_scale_y
	~~image_scale_y =~~ pdf_height / image_height_original
	print '- image original: ', image_width_original, image_height_original, image_scale_x, image_scale_y

			print '- erstelle Bild Context und zeige Bild darauf'
	context = cairo.Context(cairo_surface)		context = cairo.Context(cairo_surface)
	context.rectangle(image_x, image_y, image_width_original, image_height_original)		context.rectangle(image_x, image_y, image_width_original, image_height_original)
	context.scale(image_scale_y,image_scale_y)		context.scale(image_scale_y,image_scale_y)
	pattern_pattern = cairo.SurfacePattern(image_surface)		pattern_pattern = cairo.SurfacePattern(image_surface)

	context.set_source(pattern_pattern)		context.set_source(pattern_pattern)
	context.fill()		context.fill()
			print ' ... ', context

			print '- for'
			for i in range(pdf_pages):
			print' - erstelle Seite', i+2
			cairo_surface.copy_page()
			#cairo_surface.show_page()

			context = cairo.Context(cairo_surface)
	~~cairo_surface~~.~~copy_page~~()		context.rectangle(image_x, image_y, image_width_original, image_height_original)
	~~#cairo_surface~~.~~show_page~~()		context.scale(image_scale_y,image_scale_y)
			pattern_pattern = cairo.SurfacePattern(image_surface)
			context.set_source(pattern_pattern)
			context.fill()

	</source>		</source>

F am 26. November 2013 um 16:23 Uhr

2013-11-26T16:23:22Z

← Nächstältere Version		Version vom 26. November 2013, 16:23 Uhr
Zeile 5:		Zeile 5:
	<source lang="python">		<source lang="python">
	#!/usr/bin/env python		#!/usr/bin/env python
			#import os
			#import sys
			#import optparse
			#import io
			#import base64
			#import gzip


	try:		try:
	import cairocffi as cairo		import cairocffi as cairo
Zeile 10:		Zeile 18:
	import cairo # pycairo		import cairo # pycairo

	~~UNITS = {~~		pdf_output = 'test.pdf'
	~~"mm": 1 / 25.4,~~		pdf_width = 596.590909091
	~~"cm": 1 / 2.54,~~		pdf_height = 843.75
	~~"in": 1,~~
	~~"pt": 1 / 72.,~~
	~~"pc": 1 / 6.,~~
	~~"px": None}~~


	~~dpi = 300~~
	~~output~~ = 'test.pdf'
	~~width~~ = ~~int(1000) * (1 / (dpi * UNITS["pt"]))~~
	~~height~~ = ~~int(1000) * (1 / (dpi * UNITS["pt"]))~~
	imagename = '/home/dev/CairoSVG/img_65.jpg'		imagename = '/home/dev/CairoSVG/img_65.jpg'
	~~print~~ '~~dpi:~~ '~~, dpi, 'w:', width, 'h: ', height, 'output:', output~~		#imagename = '/home/dev/CairoSVG/img_65_small.jpg'
			image_x = 0
			image_y = 0

	print '- erstelle pdf'		print '- erstelle pdf', pdf_output, 'w:', pdf_width, 'h:', pdf_height
	~~surface_class~~ = cairo.PDFSurface		cairo_surface = cairo.PDFSurface(pdf_output, pdf_width, pdf_height)
	~~cairo_surface = surface_class~~(~~output~~, ~~width~~, ~~height~~)

	print '- lese Bild ', imagename		print '- lese Bild ', imagename
Zeile 40:		Zeile 39:

	image_surface = cairo.ImageSurface.create_from_png(png_file)		image_surface = cairo.ImageSurface.create_from_png(png_file)
			image_width_original = image_surface.get_width()
			image_height_original = image_surface.get_height()
			image_scale_x = pdf_width / image_width_original
			image_scale_y = pdf_height / image_height_original
			print '- image original: ', image_width_original, image_height_original, image_scale_x, image_scale_y

			context = cairo.Context(cairo_surface)
			context.rectangle(image_x, image_y, image_width_original, image_height_original)
			context.scale(image_scale_y,image_scale_y)
	pattern_pattern = cairo.SurfacePattern(image_surface)		pattern_pattern = cairo.SurfacePattern(image_surface)
	~~##.context.save()~~

	~~print '- weitere Seite'~~		context.set_source(pattern_pattern)
			context.fill()



	cairo_surface.copy_page()		cairo_surface.copy_page()
	cairo_surface.show_page()		#cairo_surface.show_page()


	</source>		</source>
	* Quellen		* Quellen
	** [http://cairosvg.org CairoSVG]		** [http://cairosvg.org CairoSVG]
	** [https://github.com/Kozea/CairoSVG github.com/Kozea/CairoSVG]		** [https://github.com/Kozea/CairoSVG github.com/Kozea/CairoSVG]

F am 26. November 2013 um 02:16 Uhr

2013-11-26T02:16:10Z

← Nächstältere Version		Version vom 26. November 2013, 02:16 Uhr
Zeile 1:		Zeile 1:
			* http://www.tortall.net/mu/wiki/CairoTutorial

			= Beispiele =
	== Cairo - erstelle ein pdf in python ==		== Cairo - erstelle ein pdf in python ==
	<source lang="python">		<source lang="python">
Zeile 45:		Zeile 48:
	</source>		</source>
	* Quellen		* Quellen
	**		** [http://cairosvg.org CairoSVG]
	** [https://github.com/Kozea/CairoSVG github.com/Kozea/CairoSVG]		** [https://github.com/Kozea/CairoSVG github.com/Kozea/CairoSVG]

F am 26. November 2013 um 02:15 Uhr

2013-11-26T02:15:13Z

← Nächstältere Version		Version vom 26. November 2013, 02:15 Uhr
Zeile 1:		Zeile 1:

	== Cairo - erstelle ein pdf in python ==		== Cairo - erstelle ein pdf in python ==
	<source lang="python">		<source lang="python">
Zeile 45:		Zeile 44:
	cairo_surface.show_page()		cairo_surface.show_page()
	</source>		</source>
			* Quellen
			**
			** [https://github.com/Kozea/CairoSVG github.com/Kozea/CairoSVG]

F: /* Cairo - erstelle ein pdf */

2013-11-26T02:12:21Z

Cairo - erstelle ein pdf

← Nächstältere Version		Version vom 26. November 2013, 02:12 Uhr
Zeile 1:		Zeile 1:

	== Cairo - erstelle ein pdf ==		== Cairo - erstelle ein pdf in python ==
	<source lang="python">		<source lang="python">
	#!/usr/bin/env python		#!/usr/bin/env python

F: Die Seite wurde neu angelegt: „ == Cairo - erstelle ein pdf == #!/usr/bin/env python try: import cairocffi as cairo except ImportError: import cairo # pycairo …“

2013-11-26T02:11:35Z

Die Seite wurde neu angelegt: „ == Cairo - erstelle ein pdf == <source lang="python"> #!/usr/bin/env python try: import cairocffi as cairo except ImportError: import cairo # pycairo …“

Neue Seite

== Cairo - erstelle ein pdf ==
<source lang="python">
#!/usr/bin/env python
try:
import cairocffi as cairo
except ImportError:
import cairo # pycairo

UNITS = {
"mm": 1 / 25.4,
"cm": 1 / 2.54,
"in": 1,
"pt": 1 / 72.,
"pc": 1 / 6.,
"px": None}

dpi = 300
output = 'test.pdf'
width = int(1000) * (1 / (dpi * UNITS["pt"]))
height = int(1000) * (1 / (dpi * UNITS["pt"]))
imagename = '/home/dev/CairoSVG/img_65.jpg'
print 'dpi: ', dpi, 'w:', width, 'h: ', height, 'output:', output

print '- erstelle pdf'
surface_class = cairo.PDFSurface
cairo_surface = surface_class(output, width, height)

print '- lese Bild ', imagename
input_ = open(imagename, 'rb') # filename
image_bytes = input_.read()
from io import BytesIO
png_file = BytesIO()
from PIL import Image
Image.open(BytesIO(image_bytes)).save(png_file, 'PNG')
png_file.seek(0)

image_surface = cairo.ImageSurface.create_from_png(png_file)
pattern_pattern = cairo.SurfacePattern(image_surface)
##.context.save()

print '- weitere Seite'
cairo_surface.copy_page()
cairo_surface.show_page()
</source>