def clip_to_rect(self, x, y, w, h):
""" Clip context to the given rectangular region.
Region should be a 4-tuple or a sequence.
"""
tx, ty = self.transform.tx, self.transform.ty
self.canvas_state.clip_box = agg.Rect(tx + x, ty + y, w, h)
def __init__(self, size, *args, **kwargs):
super().__init__()
self._width = size[0]
self._height = size[1]
self.pix_format = kwargs.get('pix_format', 'bgra32')
shape = (self._height, self._width, 4)
buffer = np.zeros(shape, dtype=np.uint8)
canvas_klass = pix_format_canvases[self.pix_format]
self.gc = canvas_klass(buffer, bottom_up=True)
self.marker_gc = MarkerRenderer(
buffer, pix_format=self.pix_format, bottom_up=True
)
# init the state variables
clip = agg.Rect(0, 0, self._width, self._height)
self.canvas_state = agg.GraphicsState(clip_box=clip)
self.stroke_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.fill_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.path = CompiledPath()
self.text_transform = agg.Transform()
self.text_pos = (0.0, 0.0)
self.transform = agg.Transform()
self.font = None
self.__state_stack = []
# For HiDPI support
self.base_scale = kwargs.pop('base_pixel_scale', 1)
self.transform.scale(self.base_scale, self.base_scale)
# Make this look like a kiva.agg GC
self.bmp_array = buffer
def clip_to_rect(self, x, y, w, h):
""" Clip context to the given rectangular region.
Region should be a 4-tuple or a sequence.
"""
# The passed in rect should be transformed.
# NOTE: Rotations will have an undefined result
x0, y0 = self.transform.worldToScreen(x, y)
x1, y1 = self.transform.worldToScreen(x + w, y + h)
w, h = abs(x1 - x0), abs(y1 - y0)
self.canvas_state.clip_box = agg.Rect(x0, y0, w, h)
def _clip_impl(self, shape, drawing_mode):
""" Internal implementation for the complex clipping methods.
"""
size = (self._height, self._width)
stencil = agg.CanvasG8(np.empty(size, dtype=np.uint8), bottom_up=True)
stencil.clear(0.0, 0.0, 0.0)
clip_box = agg.Rect(0, 0, self._width, self._height)
gs = agg.GraphicsState(drawing_mode=drawing_mode, clip_box=clip_box)
paint = agg.SolidPaint(1.0, 1.0, 1.0)
stencil.draw_shape(shape, self.transform, gs, stroke=paint, fill=paint)
self.canvas_state.stencil = stencil.image
def __init__(self, size, *args, **kwargs):
super(GraphicsContext, self).__init__()
self._width = size[0]
self._height = size[1]
self.pix_format = kwargs.get('pix_format', 'rgba32')
shape = (self._height, self._width, 4)
canvas_klass = pix_format_canvases[self.pix_format]
self.gc = canvas_klass(np.zeros(shape, dtype=np.uint8), bottom_up=True)
# init the state variables
clip = agg.Rect(0, 0, self._width, self._height)
self.canvas_state = agg.GraphicsState(clip_box=clip)
self.stroke_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.fill_paint = agg.SolidPaint(0.0, 0.0, 0.0)
self.path = CompiledPath()
self.text_transform = agg.Transform()
self.text_pos = (0.0, 0.0)
self.transform = agg.Transform()
self.font = None
self.__state_stack = []