/usr/lib/python2.7/dist-packages/cairocffi/test_cairo.py is in python-cairocffi 0.7.2-2.
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"""
cairocffi.tests
~~~~~~~~~~~~~~~
Test suite for cairocffi.
:copyright: Copyright 2013 by Simon Sapin
:license: BSD, see LICENSE for details.
"""
import io
import gc
import os
import sys
import math
import array
import base64
import shutil
import tempfile
import contextlib
import pytest
import cairocffi
from . import *
from .compat import u, pixel
@contextlib.contextmanager
def temp_directory():
tempdir = tempfile.mkdtemp(u('é'))
assert u('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)
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.tostring() == 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
def test_surface_create_similar_image():
if cairo_version() < 11200:
pytest.xfail()
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
def test_surface_create_for_rectangle():
if cairo_version() < 11000:
pytest.xfail()
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
def test_mime_data():
if cairo_version() < 11000:
pytest.xfail()
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)
def test_supports_mime_type():
if cairo_version() < 11200:
pytest.xfail()
# 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
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''))
def test_pdf_versions():
if cairo_version() < 11000:
pytest.xfail()
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')
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_bytes = file_obj.getvalue()
assert pdf_bytes.startswith(b'%PDF')
assert b'/MediaBox [ 0 0 123 432 ]' in pdf_bytes
assert pdf_bytes.count(b'/Type /Page\n') == 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_bytes = file_obj.getvalue()
assert b'/MediaBox [ 0 0 1 1 ]' not in pdf_bytes
assert b'/MediaBox [ 0 0 12 100 ]' in pdf_bytes
assert b'/MediaBox [ 0 0 42 700 ]' in pdf_bytes
assert pdf_bytes.count(b'/Type /Page\n') == 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(u('%%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
def _recording_surface_common(extents):
if cairo_version() < 11000:
pytest.xfail()
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
def test_unbounded_recording_surface():
if cairo_version() < 11200:
# Unbounded recording surfaces do not seem to record anything on 1.10.
pytest.xfail()
text_pixels, recorded_pixels = _recording_surface_common(None)
assert recorded_pixels == text_pixels
def test_recording_surface_get_extents():
if cairo_version() < 11200:
pytest.xfail()
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)
def test_context_in_clip():
if cairo_version() < 11000:
pytest.xfail()
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'serif', cairocffi.FONT_SLANT_ITALIC)
font_face = context.get_font_face()
assert isinstance(font_face, ToyFontFace)
assert font_face.get_family() == '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 height > ascent + descent # Not even this is true on all fonts
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(u('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 height > ascent + descent # Not even this is true on all fonts
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('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('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
def test_glyphs():
surface = ImageSurface(cairocffi.FORMAT_ARGB32, 100, 20)
context = Context(surface)
font = context.get_scaled_font()
text = u('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 font.glyph_extents(glyphs) == font.text_extents(text)
assert font.glyph_extents(glyphs) == 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')
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