def test_validating_pixel_scale_factor(self):
path = Path(__file__).parent.joinpath(
'output/canvas_builder_pixel_scale_factor.svg')
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_px(100), Cu.from_px(100))
canvas_builder.set_pixel_scale_factor(2)
with self.assertRaises(RuntimeError):
canvas_builder.build()
assert not path.exists()
def test_png(self):
path = Path(__file__).parent.joinpath('output/canvas_builder.png')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_px(100), Cu.from_px(100))
canvas_builder.set_pixel_scale_factor(2)
canvas = canvas_builder.build()
canvas.close()
assert path.exists()
def test_fill_preserve(self):
path = Path(__file__).parent.joinpath(
'output/polygon_drawer_fill_preserve.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
polygon_drawer = PolygonDrawer()
polygon_drawer.fill_color = (1, 0, 0)
polygon_drawer.stroke_color = (0, 1, 0)
polygon_drawer.stroke_width = Cu.from_pt(2)
polygon_drawer.geoms = [
Polygon([
(30, 30),
(70, 30),
(70, 70),
(30, 70),
(30, 30),
])
]
polygon_drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
assert data.find('M 30 30 L 70 30 L 70 70 L 30 70 Z M 30 30') != -1
assert data.find('fill:rgb(100%,0%,0%)') != -1
assert data.find('stroke-width:2') != -1
assert data.find('stroke:rgb(0%,100%,0%);') != -1
def test_output_translate_rotate_scale(self):
path = Path(__file__).parent.joinpath('output/svg_trs.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(
Cu.from_cm(4),
Cu.from_cm(4)
)
canvas = canvas_builder.build()
background = Background()
background.color = (0.8, 1, 0.8, 1)
background.draw(canvas)
svg = Svg(Path(__file__).parent.joinpath('test_svg_grid.svg'))
svg_size = svg.read_svg_size()
# Should set the origin of the image to the center.
svg.svg_origin = Cc(svg_size[0] / 2, svg_size[1] / 2)
# Should position the image in the center of the screen.
svg.position = Cc.from_cm(2, 2)
# Should rotate the image clock-wise.
svg.rotation = math.pi / 8
# Resizes the image to almost the size of the canvas, but not exactly.
svg.width = Cu.from_cm(3)
svg.height = Cu.from_cm(3)
svg.draw(canvas)
canvas.close()
assert path.exists()
def test_unset_paths(self):
path = Path(__file__).parent.joinpath(
'invalid_output_dir/canvas_builder_invalid_path.png')
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_px(100), Cu.from_px(100))
with self.assertRaises(RuntimeError):
canvas_builder.build()
assert not path.exists()
def test_multi_polygons(self):
path = Path(__file__).parent.joinpath(
'output/stripe_filled_polygon_drawer_multi_polygons.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
drawer = StripeFilledPolygonDrawer()
drawer.stripe_colors = [(1, 1, 0), None, (0.7, 0, 0.7), (0, 0, 0)]
drawer.stripe_widths = [
Cu.from_pt(5),
Cu.from_pt(5),
Cu.from_pt(5),
Cu.from_pt(5),
]
drawer.stripe_origin = CanvasCoordinate.from_pt(30, 30)
drawer.stripe_angle = math.pi / 8 # Vertical stripes
drawer.geoms = [
MultiPolygon([
Polygon([
(30, 30),
(70, 30),
(70, 70),
(30, 70),
(30, 30),
], [[
(35, 35),
(65, 35),
(65, 65),
(35, 65),
(35, 35),
]]),
Polygon([
(40, 40),
(60, 40),
(60, 60),
(40, 60),
(40, 40),
])
])
]
drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
assert data.find('fill:rgb(100%,100%,0%)') != -1
assert data.find('fill:rgb(0%,0%,0%)') != -1
assert data.find('fill:rgb(70%,0%,70%)') != -1
assert data.find('stroke:none') != -1
assert data.find('stroke-width:') == -1
def test_unset_size(self):
path = Path(__file__).parent.joinpath(
'output/canvas_builder_invalid_sizes.png')
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
with self.assertRaises(RuntimeError):
canvas_builder.build()
assert not path.exists()
def test_single_stripe(self):
path = Path(__file__).parent.joinpath(
'output/stripe_filled_polygon_drawer_single.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
drawer = StripeFilledPolygonDrawer()
drawer.stripe_colors = [(0, 1, 0)]
drawer.geoms = [
Polygon([
(30, 30),
(70, 30),
(70, 70),
(30, 70),
(30, 30),
])
]
drawer.draw(canvas)
drawer.geoms = [
Polygon([
(40, 40),
(60, 40),
(60, 60),
(40, 60),
(40, 40),
])
]
drawer.stripe_colors = [None]
drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
assert data.find('M 30 30 L 70 30 L 70 70 L 30 70 Z M 30 30') != -1
assert data.find('M 40 40 L 60 40 L 60 60 L 40 60 Z M 40 40') == -1
assert data.find('fill:rgb(0%,100%,0%)') != -1
assert data.find('stroke:none') != -1
assert data.find('stroke-width:') == -1
def test_unit_scale(self):
surface_types = ['png', 'svg', 'pdf']
for surface_type in surface_types:
path = Path(__file__).parent\
.joinpath('output/canvas_builder_unit_scale.%s' % surface_type)
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(CanvasUnit.from_in(1),
CanvasUnit.from_in(1))
canvas = canvas_builder.build()
UnitScale().draw(canvas)
canvas.close()
assert path.exists()
def test_z_func(self):
path = Path(__file__).parent.joinpath(
'output/symbol_drawer_z_func.svg'
)
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
class MySymbolDrawer(SymbolDrawer):
def draw_symbol(self, key, point: Point, canvas: Canvas):
canvas.context.set_source_rgba(point.x/100, point.y/100, 0, 1)
CairoHelper.draw_point(
canvas.context,
point,
Cu.from_pt(20).pt
)
my_symbol_drawer = MySymbolDrawer()
my_symbol_drawer.points = [
Point(30, 70),
Point(35, 60),
Point(40, 50),
Point(45, 40),
Point(50, 30),
Point(55, 40),
Point(60, 50),
Point(65, 60),
Point(70, 70)
]
my_symbol_drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
# Assert that the symbols appear
assert data.find('rgb(50%,30%,0%)') != -1
assert data.find('rgb(50%,30%,0%)') < data.find('rgb(45%,40%,0%)')
assert data.find('rgb(45%,40%,0%)') < data.find('rgb(55%,40%,0%)')
def test_setters_and_getters(self):
# Create a canvas for the sake of instantiating a layout object. We do
# this because that is how Pango actually resolves the font dimensions.
path = Path(__file__).parent.joinpath(
'output/layout_setters_and_getters.svg')
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
layout = Layout(canvas)
layout.set_text('Hello world')
layout.set_markup('<span weight="bold">Hello world!</span>')
assert layout.width is None
assert layout.height is None
layout.width = Cu.from_pt(100)
layout.height = Cu.from_pt(50)
assert layout.width.pt == 100
assert layout.height.pt == 50
layout.reset_width()
layout.reset_height()
assert layout.width is None
assert layout.height is None
assert layout.position.x.pt == 0
assert layout.position.y.pt == 0
layout.position = CanvasCoordinate(Cu.from_pt(10), Cu.from_pt(5))
assert layout.position.x.pt == 10
assert layout.position.y.pt == 5
assert layout.color == (0, 0, 0, 1)
layout.color = (0, 1, 0, 0.5)
assert layout.color == (0, 1, 0, 0.5)
assert layout.alignment == Alignment.LEFT
layout.alignment = Alignment.RIGHT
assert layout.alignment == Alignment.RIGHT
extents = layout.logical_extents
assert extents.pos.x.pt == 10
assert extents.pos.y.pt == 5
assert extents.width.pt > 1
assert extents.height.pt > 1
def test_can_iterate_dict(self):
path = Path(__file__).parent.joinpath(
'output/symbol_drawer_can_iterate_dict.svg'
)
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
class MySymbolDrawer(SymbolDrawer):
def draw_symbol(self, key, point: Point, canvas: Canvas):
canvas.context.set_source_rgba(point.x/100, point.y/100, 0, 1)
CairoHelper.draw_point(
canvas.context,
point,
Cu.from_pt(key).pt
)
my_symbol_drawer = MySymbolDrawer()
my_symbol_drawer.points = {
2: Point(30, 70),
4: Point(35, 60),
6: Point(40, 50),
8: Point(45, 40),
10: Point(50, 30),
12: Point(55, 40),
14: Point(60, 50),
16: Point(65, 60),
18: Point(70, 70)
}
my_symbol_drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
# Assert that the symbols appear with correct size
assert data.find('d="M 55 30 C') != -1
assert data.find('d="M 79 70 C') != -1
def build_canvas(self, name: str) -> Canvas:
name = re.sub(r'[^0-9A-Za-z_-]', '', name)
path = Path(__file__).parent.joinpath(
'output/azimuthal_rendering_%s.svg' % name
)
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(
Cu.from_px(
self.margin * 3 + self.azimuthal_width + self.wgs84_width
),
Cu.from_px(
self.margin * 2 + self.azimuthal_height
)
)
return canvas_builder.build()
def test_scale(self):
path = Path(__file__).parent.joinpath('output/svg_scale.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(
Cu.from_cm(9),
Cu.from_cm(6)
)
canvas = canvas_builder.build()
background = Background()
background.color = (1, 0.8, 0.8, 1)
background.draw(canvas)
# No scaling
svg = Svg(Path(__file__).parent.joinpath('test_svg.svg'))
svg.position = Cc.from_cm(1, 1)
svg.draw(canvas)
# Scale 2x by height
svg = Svg(Path(__file__).parent.joinpath('test_svg.svg'))
svg.position = Cc.from_cm(5, 1)
svg.width = Cu.from_cm(3)
svg.draw(canvas)
# Scale 2x by height
svg = Svg(Path(__file__).parent.joinpath('test_svg.svg'))
svg.position = Cc.from_cm(1, 4)
svg.height = Cu.from_cm(1)
svg.draw(canvas)
# Scale without ratio preservation
svg = Svg(Path(__file__).parent.joinpath('test_svg.svg'))
svg.position = Cc.from_cm(5, 4)
svg.width = Cu.from_cm(3)
svg.height = Cu.from_cm(1)
svg.draw(canvas)
canvas.close()
assert path.exists()
def test_line_string(self):
path = Path(__file__).parent.joinpath(
'output/line_drawer_line_string.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
line_drawer = LineDrawer()
line_drawer.stroke_color = (0, 1, 0)
line_drawer.stroke_width = Cu.from_pt(1.5)
line_drawer.stroke_dashes = ([
Cu.from_pt(1),
Cu.from_pt(3),
Cu.from_pt(3),
Cu.from_pt(3)
], Cu.from_pt(4))
line_drawer.stroke_line_cap = cairocffi.constants.LINE_CAP_ROUND
line_drawer.stroke_line_join = cairocffi.constants.LINE_JOIN_MITER
line_drawer.geoms = [
LineString([
(30, 30),
(70, 30),
(70, 70),
(30, 70),
])
]
line_drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
assert data.find('M 30 30 L 70 30 L 70 70 L 30 70') != -1
assert data.find('fill:none') != -1
assert data.find('stroke-width:1.5') != -1
assert data.find('stroke:rgb(0%,100%,0%);') != -1
def test_multi_line_string(self):
path = Path(__file__).parent.joinpath(
'output/line_drawer_multi_line_string.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
line_drawer = LineDrawer()
line_drawer.stroke_color = (1, 0, 0)
line_drawer.stroke_width = Cu.from_pt(1.5)
line_drawer.geoms = [
MultiLineString([[
(30, 30),
(70, 30),
(70, 70),
(30, 70),
], [
(40, 40),
(40, 60),
(60, 60),
(60, 40),
]])
]
line_drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
assert data.find('M 30 30 L 70 30 L 70 70 L 30 70') != -1
assert data.find('M 40 40 L 40 60 L 60 60 L 60 40') != -1
assert data.find('fill:none') != -1
assert data.find('stroke-width:1.5') != -1
assert data.find('stroke:rgb(100%,0%,0%);') != -1
def test_two_vertical_stripes(self):
path = Path(__file__).parent.joinpath(
'output/stripe_filled_polygon_drawer_two_vertical_stripes.svg')
path.unlink(missing_ok=True)
canvas_builder = CanvasBuilder()
canvas_builder.set_path(path)
canvas_builder.set_size(Cu.from_pt(100), Cu.from_pt(100))
canvas = canvas_builder.build()
drawer = StripeFilledPolygonDrawer()
drawer.stripe_colors = [(0, 1, 0), (0, 0, 1)]
drawer.stripe_widths = [Cu.from_pt(20), Cu.from_pt(20)]
drawer.stripe_origin = CanvasCoordinate.from_pt(30, 30)
drawer.stripe_angle = math.pi / 2 # Vertical stripes
drawer.geoms = [
Polygon([
(30, 30),
(70, 30),
(70, 70),
(30, 70),
(30, 30),
])
]
drawer.draw(canvas)
canvas.close()
assert path.exists()
with open(path, 'r') as file:
data = file.read()
assert data.find('M 30 30 L 30 70 L 50 70 L 50 30 Z M 30 30') != -1
assert data.find('M 50 30 L 50 70 L 70 70 L 70 30 Z M 50 30') != -1
assert data.find('fill:rgb(0%,100%,0%)') != -1
assert data.find('fill:rgb(0%,0%,100%)') != -1
assert data.find('stroke:none') != -1
assert data.find('stroke-width:') == -1
def test_scaling_outputs(self):
surface_types = [('pdf', 1), ('svg', 1), ('png', 0.5), ('png', 1),
('png', 2)]
units = ['pt', 'in', 'cm', 'mm', 'px']
for (surface_type, pixel_scale_factor) in surface_types:
for unit in units:
canvas_builder = CanvasBuilder()
# We want to test all units, but some sizes are just too big
# and will take up lots of disk space. So we make an exception
# for inches and centimeters.
expected_size_in_unit: int
expected_size: Optional[CanvasUnit]
if unit in ['in', 'cm']:
expected_size_in_unit = 4
expected_size = Cu.from_unit(4, unit)
# Setting to a smaller size to avoid disk space issues
canvas_builder.set_size(expected_size, expected_size)
else:
expected_size_in_unit = 100
expected_size = CanvasUnit.from_unit(100, unit)
canvas_builder.set_size(expected_size, expected_size)
path = Path(__file__).parent \
.joinpath(
'output/canvas_builder_%s_%d%s_x%s.%s' %
(
surface_type,
expected_size_in_unit,
unit,
pixel_scale_factor,
surface_type
)
)
path.unlink(missing_ok=True)
canvas_builder.set_path(path)
canvas_builder.set_pixel_scale_factor(pixel_scale_factor)
canvas = canvas_builder.build()
self.draw_rectangle_top_left(canvas, unit)
canvas.close()
assert path.exists()
actual = self.get_file_dimensions_and_scale(path)
if surface_type == 'pdf':
self.assert_match(expected_size_in_unit, unit,
surface_type, 1, actual,
expected_size.pt)
elif surface_type == 'svg':
self.assert_match(expected_size_in_unit, unit,
surface_type, 1, actual,
expected_size.pt)
elif surface_type == 'png':
self.assert_match(expected_size_in_unit, unit,
surface_type, pixel_scale_factor, actual,
expected_size.px)
def test_setting_alias_modes(self):
canvas_builder = CanvasBuilder()
canvas_builder.set_anti_alias_mode(cairo.ANTIALIAS_DEFAULT)
canvas_builder.set_anti_alias_mode(cairo.ANTIALIAS_NONE)
canvas_builder.set_anti_alias_mode(cairo.ANTIALIAS_GRAY)
canvas_builder.set_anti_alias_mode(cairo.ANTIALIAS_SUBPIXEL)
canvas_builder.set_anti_alias_mode(cairo.ANTIALIAS_FAST)
canvas_builder.set_anti_alias_mode(cairo.ANTIALIAS_GOOD)
canvas_builder.set_anti_alias_mode(cairo.ANTIALIAS_BEST)
def test_invalid_setters(self):
valid_path = Path(__file__).parent.joinpath('output/valid.png')
invalid_path = Path(__file__).parent.joinpath('output/invalid.wat')
with self.assertRaises(RuntimeError):
canvas_builder = CanvasBuilder()
canvas_builder.set_size(Cu.from_mm(1), Cu.from_mm(1))
canvas_builder.set_path(invalid_path)
with self.assertRaises(RuntimeError):
canvas_builder = CanvasBuilder()
canvas_builder.set_path(valid_path)
canvas_builder.set_size(Cu.from_mm(-1), Cu.from_mm(1))
with self.assertRaises(RuntimeError):
canvas_builder = CanvasBuilder()
canvas_builder.set_path(valid_path)
canvas_builder.set_size(Cu.from_mm(1), Cu.from_mm(-1))
with self.assertRaises(RuntimeError):
canvas_builder = CanvasBuilder()
canvas_builder.set_path(valid_path)
canvas_builder.set_size(Cu.from_mm(1), Cu.from_mm(1))
canvas_builder.set_anti_alias_mode(-1)
with self.assertRaises(RuntimeError):
canvas_builder = CanvasBuilder()
canvas_builder.set_path(valid_path)
canvas_builder.set_size(Cu.from_mm(1), Cu.from_mm(1))
canvas_builder.set_anti_alias_mode(7)