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Text-on-path

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Komяpa 2010-06-10 01:13:06 +03:00
parent f6f708a524
commit 92a110834b
2 changed files with 65 additions and 2 deletions
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65
src/render.py
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@ -202,7 +202,70 @@ class RasterTile:
cr.text_path(text)
cr.fill()
else: ### render text along line
pass
c = obj[0].cs
text = unicode(text,"utf-8")
# - calculate line length
length = reduce(lambda x,y: (x[0]+((y[0]-x[1])**2 + (y[1]-x[2])**2 )**0.5, y[0], y[1]), c, (0,c[0][0],c[0][1]))[0]
print length, text, cr.text_extents(text)
if length > cr.text_extents(text)[2]:
# - function to get (x, y, normale) from (c, length_along_c)
def get_xy_from_len(c,length_along_c):
x0, y0 = c[0]
for x,y in c:
seg_len = ((x-x0)**2+(y-y0)**2)**0.5
if length_along_c < seg_len:
normed = length_along_c /seg_len
return (x-x0)*normed+x0, (y-y0)*normed+y0, math.atan2(y-y0,x-x0)
else:
length_along_c -= seg_len
x0,y0 = x,y
else:
return None
da = 0
os = 1
z = length/2-cr.text_extents(text)[2]/2
print get_xy_from_len(c,z)
if c[0][0] < c[1][0] and get_xy_from_len(c,z)[2]<math.pi/2 and get_xy_from_len(c,z)[2] > -math.pi/2:
da = 0
os = 1
z = length/2-cr.text_extents(text)[2]/2
else:
da = math.pi
os = -1
z = length/2+cr.text_extents(text)[2]/2
z1=z
if "text-halo-color" in obj[1] or "text-halo-radius" in obj[1]:
cr.set_line_width (obj[1].get("text-halo-radius", 1))
color = obj[1].get("text-halo-color", (1.,1.,1.))
cr.set_source_rgb(color[0], color[1], color[2])
for letter in text:
cr.new_path()
xy = get_xy_from_len(c,z)
#print letter, cr.text_extents(letter)
cr.move_to(xy[0],xy[1])
cr.save()
cr.rotate(xy[2]+da)
cr.text_path(letter)
cr.restore()
cr.stroke()
z += os*cr.text_extents(letter)[4]
color = obj[1].get("text-color", (0.,0.,0.))
cr.set_source_rgb(color[0], color[1], color[2])
z = z1
for letter in text:
cr.new_path()
xy = get_xy_from_len(c,z)
#print letter, cr.text_extents(letter)
cr.move_to(xy[0],xy[1])
cr.save()
cr.rotate(xy[2]+da)
cr.text_path(letter)
cr.restore()
cr.fill()
z += os*cr.text_extents(letter)[4]
texttimer.stop()
timer.stop()

2
src/style.py
View file

@ -37,7 +37,7 @@ class Styling():
#if stylefile=="zzzz":
### using "builtin" styling
self.Selectors["way"].append(StyleSelector( ( [ ( ("area",),("yes") ) ] ),{"fill-color": "#ff0000"} ))
self.Selectors["way"].append(StyleSelector( ( [ ( ("highway",),(None) ) ] ),{"width":1,"color":"#ff0000","text": "name", "text-position":"line"} ))
self.Selectors["way"].append(StyleSelector( ( [ ( ("highway",),(None) ) ] ),{"width":1,"color":"#ff0000","text": "name", "text-position":"line","text-halo-radius":2,} ))
self.Selectors["way"].append(StyleSelector( ( [ ( ("barrier",),(None) ) ] ),{"casing-width":1,} ))
self.Selectors["way"].append(StyleSelector( ( [ ( ("highway",),("residential", "tertiary", "living_street")) ] ),{"width": 3, "color":"#ffffff", "casing-width": 5, "z-index":10} ))