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import ctypes |
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from pypen.drawing.color import Color |
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from pypen.utils.math import TAU |
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from pypen.settings import default_settings |
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import cairo |
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from pyglet import gl, image |
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class PyPen(): |
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def __init__(self, user_sketch): |
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self.user_sketch = user_sketch |
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self.surface_data = None |
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self.surface = None |
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self.context = None |
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self.update_settings() |
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self._fix_primitive_functions() |
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def _fix_primitive_functions(self): |
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self.user_sketch.fill_screen = self.fill_screen |
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self.user_sketch.clear_screen = self.clear_screen |
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self.user_sketch.clear = self.clear |
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self.user_sketch.begin_shape = self.begin_shape |
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self.user_sketch.vertex = self.vertex |
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self.user_sketch.end_shape = self.end_shape |
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self.user_sketch.rectangle = self.rectangle |
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self.user_sketch.circle = self.circle |
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self.user_sketch.ellipse = self.ellipse |
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self.user_sketch.arc = self.arc |
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self.user_sketch.triangle = self.triangle |
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self.user_sketch.line = self.line |
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self.user_sketch.arc = self.arc |
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self.user_sketch.rotate = self.rotate |
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self.user_sketch.translate = self.translate |
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self.user_sketch.scale = self.scale |
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self.user_sketch.save = self.save |
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self.user_sketch.restore = self.restore |
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self.user_sketch.reset_style = self.reset_style |
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def _fill(self, unparsed_fill_color): |
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if unparsed_fill_color != "": |
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self.user_sketch.settings.fill_color = unparsed_fill_color |
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fill_color = Color.from_user_input(self.user_sketch.settings.fill_color) |
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self.context.set_source_rgba(*fill_color.rgba()) |
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self.context.fill() |
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def _stroke(self, unparsed_stroke_color, unparsed_stroke_width): |
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if unparsed_stroke_color != "": |
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self.user_sketch.settings.stroke_color = unparsed_stroke_color |
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if unparsed_stroke_width >= 0: |
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self.user_sketch.settings.stroke_width = unparsed_stroke_width |
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stroke_color = Color.from_user_input(self.user_sketch.settings.stroke_color) |
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stroke_width = self.user_sketch.settings.stroke_width |
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self.context.set_line_width(stroke_width) |
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self.context.set_source_rgba(*stroke_color.rgba()) |
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self.context.stroke_preserve() |
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def rotate(self, angle=0): |
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self.context.rotate(angle) |
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def translate(self, x=0, y=0): |
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self.context.translate(x, y) |
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def scale(self, factor=1): |
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self.context.scale(factor) |
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def save(self): |
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self.context.save() |
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def restore(self): |
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self.context.restore() |
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def reset_style(self): |
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self.user_sketch.settings.fill_color = default_settings.fill_color |
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self.user_sketch.settings.stroke_color = default_settings.stroke_color |
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self.user_sketch.settings.stroke_width = default_settings.stroke_width |
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def update_settings(self): |
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self.surface_data = (ctypes.c_ubyte * (self.user_sketch.settings.width * self.user_sketch.settings.height * 4))() |
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self.surface = cairo.ImageSurface.create_for_data(self.surface_data, |
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cairo.FORMAT_ARGB32, |
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self.user_sketch.settings.width, |
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self.user_sketch.settings.height, |
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self.user_sketch.settings.width * 4) |
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self.context = cairo.Context(self.surface) |
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self.texture = image.Texture.create_for_size(gl.GL_TEXTURE_2D, self.user_sketch.settings.width, self.user_sketch.settings.height, gl.GL_RGBA) |
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def clear_screen(self): |
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self.fill_screen("default_background_color") |
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def clear(self): |
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self.clear_screen() |
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def fill_screen(self, color="default_background_color"): |
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background_color = Color.from_user_input(color) |
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self.context.save() |
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self.context.scale(self.user_sketch.settings.width, self.user_sketch.settings.height) |
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self.context.rectangle(0, 0, 1, 1) |
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self.context.set_source_rgba(*background_color.rgba()) |
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self.context.fill() |
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self.context.restore() |
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def begin_shape(self): |
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self.user_sketch.settings._shape_begun = True |
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def vertex(self, x, y): |
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if self.user_sketch.settings._shape_begun: |
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self.context.move_to(x, y) |
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self.user_sketch.settings._starting_point = (x, y) |
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self.user_sketch.settings._shape_begun = False |
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else: |
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self.context.line_to(x, y) |
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def end_shape(self, fill_color="", stroke_color="", stroke_width=-1): |
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if self.user_sketch.settings._starting_point is not None: |
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starting_point = self.user_sketch.settings._starting_point |
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self.context.line_to(starting_point[0], starting_point[1]) |
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self.user_sketch.settings._starting_point = None |
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self._stroke(stroke_color, stroke_width) |
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self._fill(fill_color) |
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def rectangle(self, x, y, width, height, fill_color="", stroke_color="", stroke_width=-1): |
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self.context.rectangle(x, y, width, height) |
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self._stroke(stroke_color, stroke_width) |
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self._fill(fill_color) |
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def circle(self, x, y, radius, fill_color="", stroke_color="", stroke_width=-1): |
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self.context.arc(x, y, radius, 0, TAU) |
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self._stroke(stroke_color, stroke_width) |
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self._fill(fill_color) |
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def ellipse(self, x, y, width, height, fill_color="", stroke_color="", stroke_width=-1): |
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ratio = height/width |
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self.save() |
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self.context.scale(1, ratio) |
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self.context.arc(x, y/ratio, width, 0, TAU) |
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self.restore() |
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self._stroke(stroke_color, stroke_width) |
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self._fill(fill_color) |
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def arc(self, x, y, radius, start_angle, stop_angle, fill_color="", stroke_color="", stroke_width=-1): |
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self.context.arc(x, y, radius, start_angle, stop_angle) |
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self._stroke(stroke_color, stroke_width) |
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self._fill(fill_color) |
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def triangle(self, x1_or_x, y1_or_y, x2_or_width, y2_or_height, x3_or_p=0.5, y3=None, fill_color="", stroke_color="", stroke_width=-1): |
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if y3 is not None: |
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x1 = x1_or_x |
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y1 = y1_or_y |
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x2 = x2_or_width |
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y2 = y2_or_height |
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x3 = x3_or_p |
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else: |
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x = x1_or_x |
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y = y1_or_y |
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width = x2_or_width |
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height = y2_or_height |
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p = x3_or_p |
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x1 = x - width/2 |
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y1 = y + height/2 |
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x2 = x + width/2 |
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y2 = x + height/2 |
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x3 = (x2 - x1) * p + x1 |
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y3 = y - height/2 |
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self.context.move_to(x1, y1) |
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self.context.line_to(x2, y2) |
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self.context.line_to(x3, y3) |
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self.context.line_to(x1, y1) |
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self._stroke(stroke_color, stroke_width) |
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self._fill(fill_color) |
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def line(self, x1, y1, x2, y2, stroke_color="", stroke_width=-1): |
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self.context.move_to(x1, y1) |
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self.context.line_to(x2, y2) |
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self._stroke(stroke_color, stroke_width) |
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Canvim /
PyPen
