def _clip(self):
fig = self.ax.figure
l,b,w,h = fig.bbox.get_bounds()
path = agg.path_storage()
for i, xy in enumerate(self.poly.get_verts()):
x,y = xy
y = h-y
if i==0: path.move_to(x,y)
else: path.line_to(x,y)
path.close_polygon()
self.line.set_clip_path(path)
self.canvas.draw_idle()
def make_agg_path(pathdata):
agg_path = agg.path_storage()
codes, xy = pathdata
Ncodes = len(codes)
for i in range(Ncodes):
x, y = xy[i]
code = codes[i]
#XXX handle other path codes here
if code == MOVETO:
agg_path.move_to(x, y)
elif code == LINETO:
agg_path.line_to(x, y)
elif code == CLOSEPOLY:
agg_path.close_polygon()
return agg_path
def make_agg_path(pathdata):
agg_path = agg.path_storage()
codes, xy = pathdata
Ncodes = len(codes)
for i in range(Ncodes):
x, y = xy[i]
code = codes[i]
# XXX handle other path codes here
if code == MOVETO:
agg_path.move_to(x, y)
elif code == LINETO:
agg_path.line_to(x, y)
elif code == CLOSEPOLY:
agg_path.close_polygon()
return agg_path
def draw_lines(self, gc, x, y, trans):
"""
x and y are equal length arrays, draw lines connecting each
point in x, y
"""
x, y = trans.numerix_x_y(x, y)
if len(x) < 2: return
path = agg.path_storage()
path.move_to(x[0], self.height - y[0])
for i in xrange(1, len(x)):
path.line_to(x[i], self.height - y[i])
stroke = agg.conv_stroke(path)
stroke.width(1.0)
r, g, b = [int(255 * val) for val in gc.get_rgb()]
a = int(255 * gc.get_alpha())
color = agg.rgba8(r, g, b, a)
self.renderer.color(color)
self.rasterizer.add_path(stroke)
agg.render_scanlines(self.rasterizer, self.scanline, self.renderer)
def draw_lines(self, gc, x, y, trans):
"""
x and y are equal length arrays, draw lines connecting each
point in x, y
"""
x, y = trans.numerix_x_y(x,y)
if len(x)<2: return
path = agg.path_storage()
path.move_to(x[0],self.height-y[0])
for i in xrange(1, len(x)):
path.line_to(x[i],self.height-y[i])
stroke = agg.conv_stroke(path)
stroke.width(1.0)
r,g,b = [int(255*val) for val in gc.get_rgb()]
a = int(255*gc.get_alpha())
color = agg.rgba8(r,g,b,a)
self.renderer.color( color )
self.rasterizer.add_path(stroke)
agg.render_scanlines(self.rasterizer, self.scanline, self.renderer);
def glyph_to_agg_path(glyph):
path = agg.path_storage()
for tup in glyph.path:
print tup
code = tup[0]
if code == MOVETO:
x,y = tup[1:]
path.move_to(x,y)
elif code == LINETO:
x,y = tup[1:]
path.line_to(x,y)
elif code == CURVE3:
xctl, yctl, xto, yto= tup[1:]
path.curve3(xctl, yctl, xto, yto)
elif code == CURVE4:
xctl1, yctl1, xctl2, yctl2, xto, yto= tup[1:]
path.curve4(xctl1, yct1, xctl2, yctl2, xto, yto)
elif code == ENDPOLY:
path.end_poly()
return path
buffer = agg.buffer(width, height, stride) rbuf = agg.rendering_buffer() rbuf.attachb(buffer) pf = agg.pixel_format_rgba(rbuf) rbase = agg.renderer_base_rgba(pf) rbase.clear_rgba8(blue) renderer = agg.renderer_scanline_aa_solid_rgba(rbase); renderer.color_rgba8( red ) rasterizer = agg.rasterizer_scanline_aa() scanline = agg.scanline_p8() ## A polygon path path = agg.path_storage() path.move_to(10,10) path.line_to(100,100) path.line_to(200,200) path.line_to(100,200) path.close_polygon() # stroke it stroke = agg.conv_stroke_path(path) stroke.width(3.0) rasterizer.add_path(stroke) agg.render_scanlines_rgba(rasterizer, scanline, renderer); ## A curved path path = agg.path_storage() path.move_to(200,10)
