def __init__(self, source: BLImage) -> None:
if source is None:
raise ValueError("Argument 'source' is required.")
super().__init__()
(width, height) = source.size
self._size = Dimension(width, height)
self._source = source
pixels = source.pixels[:]
channels = 4
length = width * height
def load_image() -> Iterable[int]:
for i in range(0, length):
offset = i * channels
r = pixels[offset]
g = pixels[offset + 1]
b = pixels[offset + 2]
a = pixels[offset + 3]
yield int(b * 255)
yield int(g * 255)
yield int(r * 255)
yield int(a * 255)
data = bytearray(load_image())
pattern = ImageSurface.create_for_data(data, FORMAT_ARGB32, width,
height)
self._surface = ImageSurface(FORMAT_ARGB32, width, height)
ctx = Graphics(self._surface)
m = Matrix()
m.translate(0, height)
m.scale(1, -1)
ctx.set_matrix(m)
ctx.set_source_surface(pattern)
ctx.paint()
self.surface.flush()
pattern.finish()
def draw_text(ctx: Context, text: str, x: float, y: float, scale: float):
original = ctx.get_matrix()
ctx.translate(x, y)
ctx.scale(scale / 10) # Default font size is 10 mm (1cm)
ctx.show_text(text)
ctx.set_matrix(original)
