File: //home/arjun/projects/env/lib/python3.10/site-packages/cairocffi/test_cairo.py
"""
cairocffi.tests
~~~~~~~~~~~~~~~
Test suite for cairocffi.
:copyright: Copyright 2013-2019 by Simon Sapin
:license: BSD, see LICENSE for details.
"""
import array
import base64
import contextlib
import gc
import io
import math
import os
import shutil
import sys
import tempfile
import cairocffi
import pikepdf
import pytest
from . import (
PDF_METADATA_AUTHOR, PDF_METADATA_CREATE_DATE, PDF_METADATA_CREATOR,
PDF_METADATA_KEYWORDS, PDF_METADATA_MOD_DATE, PDF_METADATA_SUBJECT,
PDF_METADATA_TITLE, PDF_OUTLINE_FLAG_BOLD, PDF_OUTLINE_FLAG_OPEN,
PDF_OUTLINE_ROOT, SVG_UNIT_PC, SVG_UNIT_PT, SVG_UNIT_PX, SVG_UNIT_USER,
TAG_LINK, Context, FontFace, FontOptions, ImageSurface, LinearGradient,
Matrix, Pattern, PDFSurface, PSSurface, RadialGradient, RecordingSurface,
ScaledFont, SolidPattern, Surface, SurfacePattern, SVGSurface, ToyFontFace,
cairo_version, cairo_version_string)
if sys.byteorder == 'little':
def pixel(argb): # pragma: no cover
"""Convert a 4-byte ARGB string to native-endian."""
return argb[::-1]
else:
def pixel(argb): # pragma: no cover
"""Convert a 4-byte ARGB string to native-endian."""
return argb
@contextlib.contextmanager
def temp_directory():
tempdir = tempfile.mkdtemp('é')
assert 'é' in tempdir # Test non-ASCII filenames
try:
yield tempdir
finally:
shutil.rmtree(tempdir)
def round_tuple(values):
return tuple(round(v, 6) for v in values)
def assert_raise_finished(func, *args, **kwargs):
with pytest.raises(cairocffi.CairoError) as exc:
func(*args, **kwargs)
assert 'SURFACE_FINISHED' in str(exc) or 'ExceptionInfo' in str(exc)
def test_cairo_version():
major, minor, micro = map(int, cairo_version_string().split('.'))
assert cairo_version() == major * 10000 + minor * 100 + micro
def test_install_as_pycairo():
cairocffi.install_as_pycairo()
import cairo
assert cairo is cairocffi
def test_image_surface():
assert ImageSurface.format_stride_for_width(
cairocffi.FORMAT_ARGB32, 100) == 400
assert ImageSurface.format_stride_for_width(
cairocffi.FORMAT_A8, 100) == 100
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 20, 30)
assert surface.get_format() == cairocffi.FORMAT_ARGB32
assert surface.get_width() == 20
assert surface.get_height() == 30
assert surface.get_stride() == 20 * 4
with pytest.raises(ValueError):
# buffer too small
data = array.array('B', b'\x00' * 799)
ImageSurface.create_for_data(data, cairocffi.FORMAT_ARGB32, 10, 20)
data = array.array('B', b'\x00' * 800)
surface = ImageSurface.create_for_data(data, cairocffi.FORMAT_ARGB32,
10, 20, stride=40)
context = Context(surface)
# The default source is opaque black:
assert context.get_source().get_rgba() == (0, 0, 0, 1)
context.paint_with_alpha(0.5)
assert data.tobytes() == pixel(b'\x80\x00\x00\x00') * 200
def test_image_bytearray_buffer():
if '__pypy__' in sys.modules:
pytest.xfail()
# Also test buffers through ctypes.c_char.from_buffer,
# not available on PyPy
data = bytearray(800)
surface = ImageSurface.create_for_data(data, cairocffi.FORMAT_ARGB32,
10, 20, stride=40)
Context(surface).paint_with_alpha(0.5)
assert data == pixel(b'\x80\x00\x00\x00') * 200
@pytest.mark.xfail(cairo_version() < 11200,
reason='Cairo version too low')
def test_surface_create_similar_image():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 20, 30)
similar = surface.create_similar_image(cairocffi.FORMAT_A8, 4, 100)
assert isinstance(similar, ImageSurface)
assert similar.get_content() == cairocffi.CONTENT_ALPHA
assert similar.get_format() == cairocffi.FORMAT_A8
assert similar.get_width() == 4
assert similar.get_height() == 100
@pytest.mark.xfail(cairo_version() < 11000,
reason='Cairo version too low')
def test_surface_create_for_rectangle():
surface = ImageSurface(cairocffi.FORMAT_A8, 4, 4)
data = surface.get_data()
assert data[:] == b'\x00' * 16
Context(surface.create_for_rectangle(1, 1, 2, 2)).paint()
assert data[:] == (
b'\x00\x00\x00\x00'
b'\x00\xFF\xFF\x00'
b'\x00\xFF\xFF\x00'
b'\x00\x00\x00\x00')
def test_surface():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 20, 30)
similar = surface.create_similar(cairocffi.CONTENT_ALPHA, 4, 100)
assert isinstance(similar, ImageSurface)
assert similar.get_content() == cairocffi.CONTENT_ALPHA
assert similar.get_format() == cairocffi.FORMAT_A8
assert similar.get_width() == 4
assert similar.get_height() == 100
assert similar.has_show_text_glyphs() is False
assert PDFSurface(None, 1, 1).has_show_text_glyphs() is True
surface.copy_page()
surface.show_page()
surface.mark_dirty()
surface.mark_dirty_rectangle(1, 2, 300, 12000)
surface.flush()
surface.set_device_offset(14, 3)
assert surface.get_device_offset() == (14, 3)
surface.set_fallback_resolution(15, 6)
assert surface.get_fallback_resolution() == (15, 6)
context = Context(surface)
assert isinstance(context.get_target(), ImageSurface)
surface_map = cairocffi.surfaces.SURFACE_TYPE_TO_CLASS
try:
del surface_map[cairocffi.SURFACE_TYPE_IMAGE]
target = context.get_target()
assert target._pointer == surface._pointer
assert isinstance(target, Surface)
assert not isinstance(target, ImageSurface)
finally:
surface_map[cairocffi.SURFACE_TYPE_IMAGE] = ImageSurface
surface.finish()
assert_raise_finished(surface.copy_page)
assert_raise_finished(surface.show_page)
assert_raise_finished(surface.set_device_offset, 1, 2)
assert_raise_finished(surface.set_fallback_resolution, 3, 4)
def test_target_lifetime():
# Test our work around for
# Related CFFI bug: https://bitbucket.org/cffi/cffi/issue/92/
if not hasattr(sys, 'getrefcount'):
pytest.xfail() # PyPy
gc.collect() # Clean up stuff from other tests
target = io.BytesIO()
initial_refcount = sys.getrefcount(target)
assert len(cairocffi.surfaces.KeepAlive.instances) == 0
surface = PDFSurface(target, 100, 100)
# The target is in a KeepAlive object
assert len(cairocffi.surfaces.KeepAlive.instances) == 1
assert sys.getrefcount(target) == initial_refcount + 1
del surface
gc.collect() # Make sure surface is collected
assert len(cairocffi.surfaces.KeepAlive.instances) == 0
assert sys.getrefcount(target) == initial_refcount
@pytest.mark.xfail(cairo_version() < 11000,
reason='Cairo version too low')
def test_mime_data():
surface = PDFSurface(None, 1, 1)
assert surface.get_mime_data('image/jpeg') is None
gc.collect() # Clean up KeepAlive stuff from other tests
assert len(cairocffi.surfaces.KeepAlive.instances) == 0
surface.set_mime_data('image/jpeg', b'lol')
assert len(cairocffi.surfaces.KeepAlive.instances) == 1
assert surface.get_mime_data('image/jpeg')[:] == b'lol'
surface.set_mime_data('image/jpeg', None)
assert len(cairocffi.surfaces.KeepAlive.instances) == 0
if cairo_version() >= 11200:
# This actually segfauts on cairo 1.10.x
assert surface.get_mime_data('image/jpeg') is None
surface.finish()
assert_raise_finished(surface.set_mime_data, 'image/jpeg', None)
@pytest.mark.xfail(cairo_version() < 11200,
reason='Cairo version too low')
def test_supports_mime_type():
# Also test we get actual booleans:
assert PDFSurface(None, 1, 1).supports_mime_type('image/jpeg') is True
surface = ImageSurface(cairocffi.FORMAT_A8, 1, 1)
assert surface.supports_mime_type('image/jpeg') is False
@pytest.mark.xfail(cairo_version() < 11400,
reason='Cairo version too low')
def test_device_scale():
surface = PDFSurface(None, 1, 1)
assert surface.get_device_scale() == (1, 1)
surface.set_device_scale(2, 3)
assert surface.get_device_scale() == (2, 3)
@pytest.mark.xfail(cairo_version() < 11504,
reason='Cairo version too low')
def test_metadata():
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 1, 1)
surface.set_metadata(PDF_METADATA_TITLE, 'title')
surface.set_metadata(PDF_METADATA_SUBJECT, 'subject')
surface.set_metadata(PDF_METADATA_CREATOR, 'creator')
surface.set_metadata(PDF_METADATA_AUTHOR, 'author')
surface.set_metadata(PDF_METADATA_KEYWORDS, 'keywords')
surface.set_metadata(PDF_METADATA_CREATE_DATE, '2013-07-21T23:46:00+01:00')
surface.set_metadata(PDF_METADATA_MOD_DATE, '2013-07-21T23:46:00Z')
surface.finish()
pdf = pikepdf.Pdf.open(file_obj)
assert pdf.docinfo['/Title'] == "title"
assert pdf.docinfo['/Subject'] == "subject"
assert pdf.docinfo['/Creator'] == "creator"
assert pdf.docinfo['/Author'] == "author"
assert pdf.docinfo['/Keywords'] == "keywords"
# cairo 1.17.4 adds an apostrophe at the end of dates:
# https://gitlab.freedesktop.org/cairo/cairo/-/issues/392
assert str(pdf.docinfo['/CreationDate']).startswith("20130721234600+01'00")
assert pdf.docinfo['/ModDate'] == "20130721234600Z"
@pytest.mark.xfail(cairo_version() < 11504,
reason='Cairo version too low')
def test_outline():
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 1, 1)
outline = surface.add_outline(
PDF_OUTLINE_ROOT, 'title 1', 'page=1 pos=[1 1]',
PDF_OUTLINE_FLAG_OPEN & PDF_OUTLINE_FLAG_BOLD)
surface.add_outline(outline, 'title 2', 'page=1 pos=[1 1]')
surface.finish()
pdf = pikepdf.Pdf.open(file_obj)
outline = pdf.open_outline()
assert outline.root[0].title == "title 1"
assert outline.root[0].children[0].title == "title 2"
@pytest.mark.xfail(cairo_version() < 11504,
reason='Cairo version too low')
def test_page_label():
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 1, 1)
surface.set_page_label('abc')
surface.finish()
pdf = pikepdf.Pdf.open(file_obj)
assert pdf.pages[0].label == "abc"
@pytest.mark.xfail(cairo_version() < 11504,
reason='Cairo version too low')
def test_tag():
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 10, 10)
context = Context(surface)
context.tag_begin('Document')
context.tag_begin(
TAG_LINK,
attributes='rect=[1 2 4 5] uri=\'https://www.courtbouillon.org/\'')
context.set_source_rgba(1, 0, .5, 1)
context.rectangle(2, 3, 4, 5)
context.fill()
context.tag_end(TAG_LINK)
context.tag_end('Document')
context.show_page()
surface.finish()
pdf = pikepdf.Pdf.open(file_obj)
assert '"/URI": "https://www.courtbouillon.org/"' in str(pdf.objects)
assert '"/S": "/Document"' in str(pdf.objects)
@pytest.mark.xfail(cairo_version() < 11504,
reason='Cairo version too low')
def test_thumbnail_size():
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 1, 1)
surface.set_thumbnail_size(1, 1)
surface.finish()
pdf_bytes1 = file_obj.getvalue()
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 1, 1)
surface.set_thumbnail_size(9, 9)
surface.finish()
pdf_bytes2 = file_obj.getvalue()
assert len(pdf_bytes1) < len(pdf_bytes2)
@pytest.mark.xfail(cairo_version() < 11510,
reason='Cairo version too low')
def test_document_unit():
surface = SVGSurface(None, 1, 2)
assert surface.get_document_unit() in (SVG_UNIT_USER, SVG_UNIT_PT)
file_obj = io.BytesIO()
surface = SVGSurface(file_obj, 1, 2)
surface.set_document_unit(SVG_UNIT_PX)
assert surface.get_document_unit() == SVG_UNIT_PX
surface.finish()
pdf_bytes = file_obj.getvalue()
assert b'width="1px"' in pdf_bytes
assert b'height="2px"' in pdf_bytes
file_obj = io.BytesIO()
surface = SVGSurface(file_obj, 1, 2)
surface.set_document_unit(SVG_UNIT_PC)
assert surface.get_document_unit() == SVG_UNIT_PC
surface.finish()
pdf_bytes = file_obj.getvalue()
assert b'width="1pc"' in pdf_bytes
assert b'height="2pc"' in pdf_bytes
def test_png():
png_bytes = base64.b64decode(
b'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQI12O'
b'w69x7BgAE3gJRgNit0AAAAABJRU5ErkJggg==')
png_magic_number = png_bytes[:8]
with temp_directory() as tempdir:
filename = os.path.join(tempdir, 'foo.png')
filename_bytes = filename.encode(sys.getfilesystemencoding())
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 1, 1)
surface.write_to_png(filename)
with open(filename, 'rb') as fd:
written_png_bytes = fd.read()
assert written_png_bytes.startswith(png_magic_number)
open(filename, 'wb').close()
with open(filename, 'rb') as fd:
assert fd.read() == b''
surface.write_to_png(filename_bytes)
with open(filename, 'rb') as fd:
assert fd.read() == written_png_bytes
file_obj = io.BytesIO()
surface.write_to_png(file_obj)
assert file_obj.getvalue() == written_png_bytes
assert surface.write_to_png() == written_png_bytes
with open(filename, 'wb') as fd:
fd.write(png_bytes)
for source in [io.BytesIO(png_bytes), filename, filename_bytes]:
surface = ImageSurface.create_from_png(source)
assert surface.get_format() == cairocffi.FORMAT_ARGB32
assert surface.get_width() == 1
assert surface.get_height() == 1
assert surface.get_stride() == 4
assert surface.get_data()[:] == pixel(b'\xcc\x32\x6e\x97')
with pytest.raises(IOError):
# Truncated input
surface = ImageSurface.create_from_png(io.BytesIO(png_bytes[:30]))
with pytest.raises(IOError):
surface = ImageSurface.create_from_png(io.BytesIO(b''))
@pytest.mark.xfail(cairo_version() < 11000,
reason='Cairo version too low')
def test_pdf_versions():
assert set(PDFSurface.get_versions()) >= set([
cairocffi.PDF_VERSION_1_4, cairocffi.PDF_VERSION_1_5])
assert PDFSurface.version_to_string(cairocffi.PDF_VERSION_1_4) == 'PDF 1.4'
with pytest.raises(TypeError):
PDFSurface.version_to_string('PDF_VERSION_42')
with pytest.raises(ValueError):
PDFSurface.version_to_string(42)
file_obj = io.BytesIO()
PDFSurface(file_obj, 1, 1).finish()
assert file_obj.getvalue().startswith((b'%PDF-1.5', b'%PDF-1.7'))
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 1, 1)
surface.restrict_to_version(cairocffi.PDF_VERSION_1_4)
surface.finish()
assert file_obj.getvalue().startswith(b'%PDF-1.4')
def test_pdf_surface():
with temp_directory() as tempdir:
filename = os.path.join(tempdir, 'foo.pdf')
filename_bytes = filename.encode(sys.getfilesystemencoding())
file_obj = io.BytesIO()
for target in [filename, filename_bytes, file_obj, None]:
surface = PDFSurface(target, 123, 432)
surface.finish()
with open(filename, 'rb') as fd:
assert fd.read().startswith(b'%PDF')
with open(filename_bytes, 'rb') as fd:
assert fd.read().startswith(b'%PDF')
pdf = pikepdf.Pdf.open(file_obj)
assert pdf.pages[0]['/MediaBox'] == [0, 0, 123, 432]
assert len(pdf.pages) == 1
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 1, 1)
context = Context(surface)
surface.set_size(12, 100)
context.show_page()
surface.set_size(42, 700)
context.copy_page()
surface.finish()
pdf = pikepdf.Pdf.open(file_obj)
assert '"/MediaBox": [ 0 0 1 1 ]' not in str(pdf.objects)
assert pdf.pages[0]['/MediaBox'] == [0, 0, 12, 100]
assert pdf.pages[1]['/MediaBox'] == [0, 0, 42, 700]
assert len(pdf.pages) == 2
def test_svg_surface():
assert set(SVGSurface.get_versions()) >= set([
cairocffi.SVG_VERSION_1_1, cairocffi.SVG_VERSION_1_2])
assert SVGSurface.version_to_string(cairocffi.SVG_VERSION_1_1) == 'SVG 1.1'
with pytest.raises(TypeError):
SVGSurface.version_to_string('SVG_VERSION_42')
with pytest.raises(ValueError):
SVGSurface.version_to_string(42)
with temp_directory() as tempdir:
filename = os.path.join(tempdir, 'foo.svg')
filename_bytes = filename.encode(sys.getfilesystemencoding())
file_obj = io.BytesIO()
for target in [filename, filename_bytes, file_obj, None]:
SVGSurface(target, 123, 432).finish()
with open(filename, 'rb') as fd:
assert fd.read().startswith(b'<?xml')
with open(filename_bytes, 'rb') as fd:
assert fd.read().startswith(b'<?xml')
svg_bytes = file_obj.getvalue()
assert svg_bytes.startswith(b'<?xml')
assert b'viewBox="0 0 123 432"' in svg_bytes
surface = SVGSurface(None, 1, 1)
# Not obvious to test
surface.restrict_to_version(cairocffi.SVG_VERSION_1_1)
def test_ps_surface():
assert set(PSSurface.get_levels()) >= set([
cairocffi.PS_LEVEL_2, cairocffi.PS_LEVEL_3])
assert PSSurface.ps_level_to_string(cairocffi.PS_LEVEL_3) == 'PS Level 3'
with pytest.raises(TypeError):
PSSurface.ps_level_to_string('PS_LEVEL_42')
with pytest.raises(ValueError):
PSSurface.ps_level_to_string(42)
with temp_directory() as tempdir:
filename = os.path.join(tempdir, 'foo.ps')
filename_bytes = filename.encode(sys.getfilesystemencoding())
file_obj = io.BytesIO()
for target in [filename, filename_bytes, file_obj, None]:
PSSurface(target, 123, 432).finish()
with open(filename, 'rb') as fd:
assert fd.read().startswith(b'%!PS')
with open(filename_bytes, 'rb') as fd:
assert fd.read().startswith(b'%!PS')
assert file_obj.getvalue().startswith(b'%!PS')
file_obj = io.BytesIO()
surface = PSSurface(file_obj, 1, 1)
surface.restrict_to_level(cairocffi.PS_LEVEL_2) # Not obvious to test
assert surface.get_eps() is False
surface.set_eps('lol')
assert surface.get_eps() is True
surface.set_eps('')
assert surface.get_eps() is False
surface.set_size(10, 12)
surface.dsc_comment('%%Lorem')
surface.dsc_begin_setup()
surface.dsc_comment('%%ipsum')
surface.dsc_begin_page_setup()
surface.dsc_comment('%%dolor')
surface.finish()
ps_bytes = file_obj.getvalue()
assert b'%%Lorem' in ps_bytes
assert b'%%ipsum' in ps_bytes
assert b'%%dolor' in ps_bytes
@pytest.mark.xfail(cairo_version() < 11000,
reason='Cairo version too low')
def _recording_surface_common(extents):
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 100, 100)
empty_pixels = surface.get_data()[:]
assert empty_pixels == b'\x00' * 40000
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 100, 100)
context = Context(surface)
context.move_to(20, 50)
context.show_text('Something about us.')
text_pixels = surface.get_data()[:]
assert text_pixels != empty_pixels
recording_surface = RecordingSurface(cairocffi.CONTENT_COLOR_ALPHA,
extents)
context = Context(recording_surface)
context.move_to(20, 50)
assert recording_surface.ink_extents() == (0, 0, 0, 0)
context.show_text('Something about us.')
recording_surface.flush()
assert recording_surface.ink_extents() != (0, 0, 0, 0)
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 100, 100)
context = Context(surface)
context.set_source_surface(recording_surface)
context.paint()
recorded_pixels = surface.get_data()[:]
return text_pixels, recorded_pixels
def test_recording_surface():
text_pixels, recorded_pixels = _recording_surface_common((0, 0, 140, 80))
assert recorded_pixels == text_pixels
@pytest.mark.xfail(cairo_version() < 11200,
reason='Cairo version too low')
def test_unbounded_recording_surface():
text_pixels, recorded_pixels = _recording_surface_common(None)
assert recorded_pixels == text_pixels
@pytest.mark.xfail(cairo_version() < 11200,
reason='Cairo version too low')
def test_recording_surface_get_extents():
for extents in [None, (0, 0, 140, 80)]:
surface = RecordingSurface(cairocffi.CONTENT_COLOR_ALPHA, extents)
assert surface.get_extents() == extents
def test_matrix():
m = Matrix()
with pytest.raises(AttributeError):
m.some_inexistent_attribute
assert m.as_tuple() == (1, 0, 0, 1, 0, 0)
m.translate(12, 4)
assert m.as_tuple() == (1, 0, 0, 1, 12, 4)
m.scale(2, 7)
assert m.as_tuple() == (2, 0, 0, 7, 12, 4)
assert m[3] == 7
assert m.yy == 7
m.yy = 3
assert m.as_tuple() == (2, 0, 0, 3, 12, 4)
assert repr(m) == 'Matrix(2, 0, 0, 3, 12, 4)'
assert str(m) == 'Matrix(2, 0, 0, 3, 12, 4)'
assert m.transform_distance(1, 2) == (2, 6)
assert m.transform_point(1, 2) == (14, 10)
m2 = m.copy()
assert m2 == m
m2.invert()
assert m2.as_tuple() == (0.5, 0, 0, 1./3, -12 / 2, -4. / 3)
assert m.inverted() == m2
assert m.as_tuple() == (2, 0, 0, 3, 12, 4) # Unchanged
m2 = Matrix(*m)
assert m2 == m
m2.invert()
assert m2.as_tuple() == (0.5, 0, 0, 1./3, -12 / 2, -4. / 3)
assert m.inverted() == m2
assert m.as_tuple() == (2, 0, 0, 3, 12, 4) # Still unchanged
m.rotate(math.pi / 2)
assert round_tuple(m.as_tuple()) == (0, 3, -2, 0, 12, 4)
m *= Matrix.init_rotate(math.pi)
assert round_tuple(m.as_tuple()) == (0, -3, 2, 0, -12, -4)
def test_surface_pattern():
surface = ImageSurface(cairocffi.FORMAT_A1, 1, 1)
pattern = SurfacePattern(surface)
surface_again = pattern.get_surface()
assert surface_again is not surface
assert surface_again._pointer == surface._pointer
assert pattern.get_extend() == cairocffi.EXTEND_NONE
pattern.set_extend(cairocffi.EXTEND_REPEAT)
assert pattern.get_extend() == cairocffi.EXTEND_REPEAT
assert pattern.get_filter() == cairocffi.FILTER_GOOD
pattern.set_filter(cairocffi.FILTER_BEST)
assert pattern.get_filter() == cairocffi.FILTER_BEST
assert pattern.get_matrix() == Matrix() # identity
matrix = Matrix.init_rotate(0.5)
pattern.set_matrix(matrix)
assert pattern.get_matrix() == matrix
assert pattern.get_matrix() != Matrix()
def test_solid_pattern():
assert SolidPattern(1, .5, .25).get_rgba() == (1, .5, .25, 1)
assert SolidPattern(1, .5, .25, .75).get_rgba() == (1, .5, .25, .75)
surface = PDFSurface(None, 1, 1)
context = Context(surface)
pattern = SolidPattern(1, .5, .25)
context.set_source(pattern)
assert isinstance(context.get_source(), SolidPattern)
pattern_map = cairocffi.patterns.PATTERN_TYPE_TO_CLASS
try:
del pattern_map[cairocffi.PATTERN_TYPE_SOLID]
re_pattern = context.get_source()
assert re_pattern._pointer == pattern._pointer
assert isinstance(re_pattern, Pattern)
assert not isinstance(re_pattern, SolidPattern)
finally:
pattern_map[cairocffi.PATTERN_TYPE_SOLID] = SolidPattern
def pdf_with_pattern(pattern=None):
file_obj = io.BytesIO()
surface = PDFSurface(file_obj, 100, 100)
context = Context(surface)
if pattern is not None:
context.set_source(pattern)
context.paint()
surface.finish()
return file_obj.getvalue()
def test_linear_gradient():
gradient = LinearGradient(1, 2, 10, 20)
assert gradient.get_linear_points() == (1, 2, 10, 20)
gradient.add_color_stop_rgb(1, 1, .5, .25)
gradient.add_color_stop_rgb(offset=.5, red=1, green=.5, blue=.25)
gradient.add_color_stop_rgba(.5, 1, .5, .75, .25)
assert gradient.get_color_stops() == [
(.5, 1, .5, .25, 1),
(.5, 1, .5, .75, .25),
(1, 1, .5, .25, 1)]
# Values chosen so that we can test get_data() bellow with an exact
# byte string that (hopefully) does not depend on rounding behavior:
# 255 / 5. == 51.0 == 0x33
surface = ImageSurface(cairocffi.FORMAT_A8, 8, 4)
assert surface.get_data()[:] == b'\x00' * 32
gradient = LinearGradient(1.5, 0, 6.5, 0)
gradient.add_color_stop_rgba(0, 0, 0, 0, 0)
gradient.add_color_stop_rgba(1, 0, 0, 0, 1)
context = Context(surface)
context.set_source(gradient)
context.paint()
assert surface.get_data()[:] == b'\x00\x00\x33\x66\x99\xCC\xFF\xFF' * 4
assert b'/ShadingType 2' not in pdf_with_pattern()
assert b'/ShadingType 2' in pdf_with_pattern(gradient)
def test_radial_gradient():
gradient = RadialGradient(42, 420, 10, 43, 430, 100)
assert gradient.get_radial_circles() == (42, 420, 10, 43, 430, 100)
gradient.add_color_stop_rgb(1, 1, .5, .25)
gradient.add_color_stop_rgb(offset=.5, red=1, green=.5, blue=.25)
gradient.add_color_stop_rgba(.5, 1, .5, .75, .25)
assert gradient.get_color_stops() == [
(.5, 1, .5, .25, 1),
(.5, 1, .5, .75, .25),
(1, 1, .5, .25, 1)]
assert b'/ShadingType 3' not in pdf_with_pattern()
assert b'/ShadingType 3' in pdf_with_pattern(gradient)
def test_context_as_context_manager():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 1, 1)
context = Context(surface)
# The default source is opaque black:
assert context.get_source().get_rgba() == (0, 0, 0, 1)
with context:
context.set_source_rgb(1, .25, .5)
assert context.get_source().get_rgba() == (1, .25, .5, 1)
# Context restored at the end of with statement.
assert context.get_source().get_rgba() == (0, 0, 0, 1)
try:
with context:
context.set_source_rgba(1, .25, .75, .5)
assert context.get_source().get_rgba() == (1, .25, .75, .5)
raise ValueError
except ValueError:
pass
# Context also restored on exceptions.
assert context.get_source().get_rgba() == (0, 0, 0, 1)
def test_context_groups():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 1, 1)
context = Context(surface)
assert isinstance(context.get_target(), ImageSurface)
assert context.get_target()._pointer == surface._pointer
assert context.get_group_target()._pointer == surface._pointer
assert (context.get_group_target().get_content() ==
cairocffi.CONTENT_COLOR_ALPHA)
assert surface.get_data()[:] == pixel(b'\x00\x00\x00\x00')
with context:
context.push_group_with_content(cairocffi.CONTENT_ALPHA)
assert (context.get_group_target().get_content() ==
cairocffi.CONTENT_ALPHA)
context.set_source_rgba(1, .2, .4, .8) # Only A is actually used
assert isinstance(context.get_source(), SolidPattern)
context.paint()
context.pop_group_to_source()
assert isinstance(context.get_source(), SurfacePattern)
# Still nothing on the original surface
assert surface.get_data()[:] == pixel(b'\x00\x00\x00\x00')
context.paint()
assert surface.get_data()[:] == pixel(b'\xCC\x00\x00\x00')
with context:
context.push_group()
context.set_source_rgba(1, .2, .4)
context.paint()
group = context.pop_group()
assert isinstance(context.get_source(), SolidPattern)
assert isinstance(group, SurfacePattern)
context.set_source_surface(group.get_surface())
assert surface.get_data()[:] == pixel(b'\xCC\x00\x00\x00')
context.paint()
assert surface.get_data()[:] == pixel(b'\xFF\xFF\x33\x66')
def test_context_current_transform_matrix():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 1, 1)
context = Context(surface)
assert isinstance(context.get_matrix(), Matrix)
assert context.get_matrix().as_tuple() == (1, 0, 0, 1, 0, 0)
context.translate(6, 5)
assert context.get_matrix().as_tuple() == (1, 0, 0, 1, 6, 5)
context.scale(1, 6)
assert context.get_matrix().as_tuple() == (1, 0, 0, 6, 6, 5)
context.scale(.5)
assert context.get_matrix().as_tuple() == (.5, 0, 0, 3, 6, 5)
context.rotate(math.pi / 2)
assert round_tuple(context.get_matrix().as_tuple()) == (0, 3, -.5, 0, 6, 5)
context.identity_matrix()
assert context.get_matrix().as_tuple() == (1, 0, 0, 1, 0, 0)
context.set_matrix(Matrix(2, 1, 3, 7, 8, 2))
assert context.get_matrix().as_tuple() == (2, 1, 3, 7, 8, 2)
context.transform(Matrix(2, 0, 0, .5, 0, 0))
assert context.get_matrix().as_tuple() == (4, 2, 1.5, 3.5, 8, 2)
context.set_matrix(Matrix(2, 0, 0, 3, 12, 4))
assert context.user_to_device_distance(1, 2) == (2, 6)
assert context.user_to_device(1, 2) == (14, 10)
assert context.device_to_user_distance(2, 6) == (1, 2)
assert round_tuple(context.device_to_user(14, 10)) == (1, 2)
def test_context_path():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 1, 1)
context = Context(surface)
assert context.copy_path() == []
assert context.has_current_point() is False
assert context.get_current_point() == (0, 0)
context.arc(100, 200, 20, math.pi/2, 0)
path_1 = context.copy_path()
assert path_1[0] == (cairocffi.PATH_MOVE_TO, (100, 220))
assert len(path_1) > 1
assert all(part[0] == cairocffi.PATH_CURVE_TO for part in path_1[1:])
assert context.has_current_point() is True
assert context.get_current_point() == (120, 200)
context.new_sub_path()
assert context.copy_path() == path_1
assert context.has_current_point() is False
assert context.get_current_point() == (0, 0)
context.new_path()
assert context.copy_path() == []
assert context.has_current_point() is False
assert context.get_current_point() == (0, 0)
context.arc_negative(100, 200, 20, math.pi/2, 0)
path_2 = context.copy_path()
assert path_2[0] == (cairocffi.PATH_MOVE_TO, (100, 220))
assert len(path_2) > 1
assert all(part[0] == cairocffi.PATH_CURVE_TO for part in path_2[1:])
assert path_2 != path_1
context.new_path()
context.rectangle(10, 20, 100, 200)
path = context.copy_path()
# Some cairo versions add a MOVE_TO after a CLOSE_PATH
if path[-1] == (cairocffi.PATH_MOVE_TO, (10, 20)): # pragma: no cover
path = path[:-1]
assert path == [
(cairocffi.PATH_MOVE_TO, (10, 20)),
(cairocffi.PATH_LINE_TO, (110, 20)),
(cairocffi.PATH_LINE_TO, (110, 220)),
(cairocffi.PATH_LINE_TO, (10, 220)),
(cairocffi.PATH_CLOSE_PATH, ())]
assert context.path_extents() == (10, 20, 110, 220)
context.new_path()
context.move_to(10, 20)
context.line_to(10, 30)
context.rel_move_to(2, 5)
context.rel_line_to(2, 5)
context.curve_to(20, 30, 70, 50, 100, 120)
context.rel_curve_to(20, 30, 70, 50, 100, 120)
context.close_path()
path = context.copy_path()
if path[-1] == (cairocffi.PATH_MOVE_TO, (12, 35)): # pragma: no cover
path = path[:-1]
assert path == [
(cairocffi.PATH_MOVE_TO, (10, 20)),
(cairocffi.PATH_LINE_TO, (10, 30)),
(cairocffi.PATH_MOVE_TO, (12, 35)),
(cairocffi.PATH_LINE_TO, (14, 40)),
(cairocffi.PATH_CURVE_TO, (20, 30, 70, 50, 100, 120)),
(cairocffi.PATH_CURVE_TO, (120, 150, 170, 170, 200, 240)),
(cairocffi.PATH_CLOSE_PATH, ())]
context.new_path()
context.move_to(10, 15)
context.curve_to(20, 30, 70, 50, 100, 120)
assert context.copy_path() == [
(cairocffi.PATH_MOVE_TO, (10, 15)),
(cairocffi.PATH_CURVE_TO, (20, 30, 70, 50, 100, 120))]
path = context.copy_path_flat()
assert len(path) > 2
assert path[0] == (cairocffi.PATH_MOVE_TO, (10, 15))
assert all(part[0] == cairocffi.PATH_LINE_TO for part in path[1:])
assert path[-1] == (cairocffi.PATH_LINE_TO, (100, 120))
context.new_path()
context.move_to(10, 20)
context.line_to(10, 30)
path = context.copy_path()
assert path == [
(cairocffi.PATH_MOVE_TO, (10, 20)),
(cairocffi.PATH_LINE_TO, (10, 30))]
additional_path = [(cairocffi.PATH_LINE_TO, (30, 150))]
context.append_path(additional_path)
assert context.copy_path() == path + additional_path
# Incorrect number of points:
with pytest.raises(ValueError):
context.append_path([(cairocffi.PATH_LINE_TO, (30, 150, 1))])
with pytest.raises(ValueError):
context.append_path([(cairocffi.PATH_LINE_TO, (30, 150, 1, 4))])
def test_context_properties():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 1, 1)
context = Context(surface)
assert context.get_antialias() == cairocffi.ANTIALIAS_DEFAULT
context.set_antialias(cairocffi.ANTIALIAS_BEST)
assert context.get_antialias() == cairocffi.ANTIALIAS_BEST
assert context.get_dash() == ([], 0)
context.set_dash([4, 1, 3, 2], 1.5)
assert context.get_dash() == ([4, 1, 3, 2], 1.5)
assert context.get_dash_count() == 4
assert context.get_fill_rule() == cairocffi.FILL_RULE_WINDING
context.set_fill_rule(cairocffi.FILL_RULE_EVEN_ODD)
assert context.get_fill_rule() == cairocffi.FILL_RULE_EVEN_ODD
assert context.get_line_cap() == cairocffi.LINE_CAP_BUTT
context.set_line_cap(cairocffi.LINE_CAP_SQUARE)
assert context.get_line_cap() == cairocffi.LINE_CAP_SQUARE
assert context.get_line_join() == cairocffi.LINE_JOIN_MITER
context.set_line_join(cairocffi.LINE_JOIN_ROUND)
assert context.get_line_join() == cairocffi.LINE_JOIN_ROUND
assert context.get_line_width() == 2
context.set_line_width(13)
assert context.get_line_width() == 13
assert context.get_miter_limit() == 10
context.set_miter_limit(4)
assert context.get_miter_limit() == 4
assert context.get_operator() == cairocffi.OPERATOR_OVER
context.set_operator(cairocffi.OPERATOR_XOR)
assert context.get_operator() == cairocffi.OPERATOR_XOR
assert context.get_tolerance() == 0.1
context.set_tolerance(0.25)
assert context.get_tolerance() == 0.25
def test_context_fill():
surface = ImageSurface(cairocffi.FORMAT_A8, 4, 4)
assert surface.get_data()[:] == b'\x00' * 16
context = Context(surface)
context.set_source_rgba(0, 0, 0, .5)
context.set_line_width(.5)
context.rectangle(1, 1, 2, 2)
assert context.fill_extents() == (1, 1, 3, 3)
assert context.stroke_extents() == (.75, .75, 3.25, 3.25)
assert context.in_fill(2, 2) is True
assert context.in_fill(.8, 2) is False
assert context.in_stroke(2, 2) is False
assert context.in_stroke(.8, 2) is True
path = list(context.copy_path())
assert path
context.fill_preserve()
assert list(context.copy_path()) == path
assert surface.get_data()[:] == (
b'\x00\x00\x00\x00'
b'\x00\x80\x80\x00'
b'\x00\x80\x80\x00'
b'\x00\x00\x00\x00'
)
context.fill()
assert list(context.copy_path()) == []
assert surface.get_data()[:] == (
b'\x00\x00\x00\x00'
b'\x00\xC0\xC0\x00'
b'\x00\xC0\xC0\x00'
b'\x00\x00\x00\x00'
)
def test_context_stroke():
for preserve in [True, False]:
surface = ImageSurface(cairocffi.FORMAT_A8, 4, 4)
assert surface.get_data()[:] == b'\x00' * 16
context = Context(surface)
context.set_source_rgba(0, 0, 0, 1)
context.set_line_width(1)
context.rectangle(.5, .5, 2, 2)
path = list(context.copy_path())
assert path
context.stroke_preserve() if preserve else context.stroke()
assert list(context.copy_path()) == (path if preserve else [])
assert surface.get_data()[:] == (
b'\xFF\xFF\xFF\x00'
b'\xFF\x00\xFF\x00'
b'\xFF\xFF\xFF\x00'
b'\x00\x00\x00\x00')
def test_context_clip():
surface = ImageSurface(cairocffi.FORMAT_A8, 4, 4)
assert surface.get_data()[:] == b'\x00' * 16
context = Context(surface)
context.rectangle(1, 1, 2, 2)
assert context.clip_extents() == (0, 0, 4, 4)
path = list(context.copy_path())
assert path
context.clip_preserve()
assert list(context.copy_path()) == path
assert context.clip_extents() == (1, 1, 3, 3)
context.clip()
assert list(context.copy_path()) == []
assert context.clip_extents() == (1, 1, 3, 3)
context.reset_clip()
assert context.clip_extents() == (0, 0, 4, 4)
context.rectangle(1, 1, 2, 2)
context.rectangle(1, 2, 1, 2)
context.clip()
assert context.copy_clip_rectangle_list() == [(1, 1, 2, 2), (1, 3, 1, 1)]
assert context.clip_extents() == (1, 1, 3, 4)
@pytest.mark.xfail(cairo_version() < 11000,
reason='Cairo version too low')
def test_context_in_clip():
surface = ImageSurface(cairocffi.FORMAT_A8, 4, 4)
context = Context(surface)
context.rectangle(1, 1, 2, 2)
assert context.in_clip(.5, 2) is True
assert context.in_clip(1.5, 2) is True
context.clip()
assert context.in_clip(.5, 2) is False
assert context.in_clip(1.5, 2) is True
def test_context_mask():
mask_surface = ImageSurface(cairocffi.FORMAT_ARGB32, 2, 2)
context = Context(mask_surface)
context.set_source_rgba(1, 0, .5, 1)
context.rectangle(0, 0, 1, 1)
context.fill()
context.set_source_rgba(1, .5, 1, .5)
context.rectangle(1, 1, 1, 1)
context.fill()
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 4, 4)
context = Context(surface)
context.mask(SurfacePattern(mask_surface))
o = pixel(b'\x00\x00\x00\x00')
b = pixel(b'\x80\x00\x00\x00')
B = pixel(b'\xFF\x00\x00\x00')
assert surface.get_data()[:] == (
B + o + o + o +
o + b + o + o +
o + o + o + o +
o + o + o + o
)
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 4, 4)
context = Context(surface)
context.mask_surface(mask_surface, surface_x=1, surface_y=2)
o = pixel(b'\x00\x00\x00\x00')
b = pixel(b'\x80\x00\x00\x00')
B = pixel(b'\xFF\x00\x00\x00')
assert surface.get_data()[:] == (
o + o + o + o +
o + o + o + o +
o + B + o + o +
o + o + b + o
)
def test_context_font():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 10, 10)
context = Context._from_pointer(Context(surface)._pointer, incref=True)
assert context.get_font_matrix().as_tuple() == (10, 0, 0, 10, 0, 0)
context.set_font_matrix(Matrix(2, 0, 0, 3, 12, 4))
assert context.get_font_matrix().as_tuple() == (2, 0, 0, 3, 12, 4)
context.set_font_size(14)
assert context.get_font_matrix().as_tuple() == (14, 0, 0, 14, 0, 0)
context.set_font_size(10)
context.select_font_face(b'@cairo:serif', cairocffi.FONT_SLANT_ITALIC)
font_face = context.get_font_face()
assert isinstance(font_face, ToyFontFace)
assert font_face.get_family() == '@cairo:serif'
assert font_face.get_slant() == cairocffi.FONT_SLANT_ITALIC
assert font_face.get_weight() == cairocffi.FONT_WEIGHT_NORMAL
try:
del cairocffi.fonts.FONT_TYPE_TO_CLASS[cairocffi.FONT_TYPE_TOY]
re_font_face = context.get_font_face()
assert re_font_face._pointer == font_face._pointer
assert isinstance(re_font_face, FontFace)
assert not isinstance(re_font_face, ToyFontFace)
finally:
cairocffi.fonts.FONT_TYPE_TO_CLASS[cairocffi.FONT_TYPE_TOY] = \
ToyFontFace
ascent, descent, height, max_x_advance, max_y_advance = (
context.font_extents())
# That’s about all we can assume for a default font.
assert max_x_advance > 0
assert max_y_advance == 0
_, _, _, _, x_advance, y_advance = context.text_extents('i' * 10)
assert x_advance > 0
assert y_advance == 0
context.set_font_face(
ToyFontFace('@cairo:monospace', weight=cairocffi.FONT_WEIGHT_BOLD))
_, _, _, _, x_advance_mono, y_advance = context.text_extents('i' * 10)
assert x_advance_mono > x_advance
assert y_advance == 0
assert list(context.copy_path()) == []
context.text_path('a')
assert list(context.copy_path())
assert surface.get_data()[:] == b'\x00' * 400
context.move_to(1, 9)
context.show_text('a')
assert surface.get_data()[:] != b'\x00' * 400
assert (context.get_font_options().get_hint_metrics() ==
cairocffi.HINT_METRICS_DEFAULT)
context.set_font_options(
FontOptions(hint_metrics=cairocffi.HINT_METRICS_ON))
assert (context.get_font_options().get_hint_metrics() ==
cairocffi.HINT_METRICS_ON)
assert (surface.get_font_options().get_hint_metrics() ==
cairocffi.HINT_METRICS_ON)
context.set_font_matrix(Matrix(2, 0, 0, 3, 12, 4))
assert context.get_scaled_font().get_font_matrix().as_tuple() == (
2, 0, 0, 3, 12, 4)
context.set_scaled_font(ScaledFont(ToyFontFace(), font_matrix=Matrix(
0, 1, 4, 0, 12, 4)))
assert context.get_font_matrix().as_tuple() == (0, 1, 4, 0, 12, 4)
# Reset the default
context.set_font_face(None)
# TODO: test this somehow.
def test_scaled_font():
font = ScaledFont(ToyFontFace())
font_extents = font.extents()
ascent, descent, height, max_x_advance, max_y_advance = font_extents
assert max_x_advance > 0
assert max_y_advance == 0
_, _, _, _, x_advance, y_advance = font.text_extents('i' * 10)
assert x_advance > 0
assert y_advance == 0
font = ScaledFont(ToyFontFace('@cairo:serif'))
_, _, _, _, x_advance, y_advance = font.text_extents('i' * 10)
font = ScaledFont(ToyFontFace('@cairo:monospace'))
_, _, _, _, x_advance_mono, y_advance = font.text_extents('i' * 10)
assert x_advance_mono > x_advance
assert y_advance == 0
# Not much we can test:
# The toy font face was "materialized" into a specific backend.
assert isinstance(font.get_font_face(), FontFace)
font = ScaledFont(
ToyFontFace('@cairo:monospace'),
Matrix(xx=20, yy=20), Matrix(xx=3, yy=.5),
FontOptions(antialias=cairocffi.ANTIALIAS_BEST))
assert font.get_font_options().get_antialias() == cairocffi.ANTIALIAS_BEST
assert font.get_font_matrix().as_tuple() == (20, 0, 0, 20, 0, 0)
assert font.get_ctm().as_tuple() == (3, 0, 0, .5, 0, 0)
assert font.get_scale_matrix().as_tuple() == (60, 0, 0, 10, 0, 0)
_, _, _, _, x_advance_mono_2, y_advance_2 = font.text_extents('i' * 10)
# Same yy as before:
assert y_advance == y_advance_2
# Bigger xx:
assert x_advance_mono_2 > x_advance_mono
def test_font_options():
options = FontOptions()
assert options.get_antialias() == cairocffi.ANTIALIAS_DEFAULT
options.set_antialias(cairocffi.ANTIALIAS_FAST)
assert options.get_antialias() == cairocffi.ANTIALIAS_FAST
assert options.get_subpixel_order() == cairocffi.SUBPIXEL_ORDER_DEFAULT
options.set_subpixel_order(cairocffi.SUBPIXEL_ORDER_BGR)
assert options.get_subpixel_order() == cairocffi.SUBPIXEL_ORDER_BGR
assert options.get_hint_style() == cairocffi.HINT_STYLE_DEFAULT
options.set_hint_style(cairocffi.HINT_STYLE_SLIGHT)
assert options.get_hint_style() == cairocffi.HINT_STYLE_SLIGHT
assert options.get_hint_metrics() == cairocffi.HINT_METRICS_DEFAULT
options.set_hint_metrics(cairocffi.HINT_METRICS_OFF)
assert options.get_hint_metrics() == cairocffi.HINT_METRICS_OFF
options_1 = FontOptions(hint_metrics=cairocffi.HINT_METRICS_ON)
assert options_1.get_hint_metrics() == cairocffi.HINT_METRICS_ON
assert options_1.get_antialias() == cairocffi.HINT_METRICS_DEFAULT
options_2 = options_1.copy()
assert options_2 == options_1
assert len(set([options_1, options_2])) == 1 # test __hash__
options_2.set_antialias(cairocffi.ANTIALIAS_BEST)
assert options_2 != options_1
assert len(set([options_1, options_2])) == 2
options_1.merge(options_2)
assert options_2 == options_1
@pytest.mark.xfail(cairo_version() < 11512,
reason='Cairo version too low')
def test_font_options_variations():
options = FontOptions()
assert options.get_variations() is None
options.set_variations('wght 400, wdth 300')
assert options.get_variations() == 'wght 400, wdth 300'
options.set_variations(None)
assert options.get_variations() is None
def test_glyphs():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 100, 20)
context = Context(surface)
font = context.get_scaled_font()
text = 'Étt'
glyphs, clusters, is_backwards = font.text_to_glyphs(
5, 15, text, with_clusters=True)
assert font.text_to_glyphs(5, 15, text, with_clusters=False) == glyphs
(idx1, x1, y1), (idx2, x2, y2), (idx3, x3, y3) = glyphs
assert idx1 != idx2 == idx3
assert y1 == y2 == y3 == 15
assert 5 == x1 < x2 < x3
assert clusters == [(2, 1), (1, 1), (1, 1)]
assert is_backwards == 0
assert round_tuple(font.glyph_extents(glyphs)) == (
round_tuple(font.text_extents(text)))
assert round_tuple(font.glyph_extents(glyphs)) == (
round_tuple(context.glyph_extents(glyphs)))
assert context.copy_path() == []
context.glyph_path(glyphs)
glyph_path = context.copy_path()
assert glyph_path
context.new_path()
assert context.copy_path() == []
context.move_to(10, 20) # Not the same coordinates as text_to_glyphs
context.text_path(text)
assert context.copy_path() != []
assert context.copy_path() != glyph_path
context.new_path()
assert context.copy_path() == []
context.move_to(5, 15)
context.text_path(text)
text_path = context.copy_path()
# For some reason, paths end with a different on old cairo.
assert text_path[:-1] == glyph_path[:-1]
empty = b'\x00' * 100 * 20 * 4
assert surface.get_data()[:] == empty
context.show_glyphs(glyphs)
glyph_pixels = surface.get_data()[:]
assert glyph_pixels != empty
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 100, 20)
context = Context(surface)
context.move_to(5, 15)
context.show_text_glyphs(text, glyphs, clusters, is_backwards)
text_glyphs_pixels = surface.get_data()[:]
assert glyph_pixels == text_glyphs_pixels
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 100, 20)
context = Context(surface)
context.move_to(5, 15)
context.show_text(text)
text_pixels = surface.get_data()[:]
assert glyph_pixels == text_pixels
def test_from_null_pointer():
for class_ in [Surface, Context, Pattern, FontFace, ScaledFont]:
with pytest.raises(ValueError):
class_._from_pointer(cairocffi.ffi.NULL, 'unused')