def press_ev(self, widget, event):
if event.button == 1:
# debug("Start drag")
self.drag = True
self.drag_x = event.x
self.drag_y = event.y
self.timer = Timer("Drag")
def update_surface(self, bbox, zoom, style, callback=lambda x=None: None):
rendertimer = Timer("Rendering image")
if "image" not in style.cache:
style.cache["image"] = ImageLoader()
timer = Timer("Getting data")
self.zoom = zoom
self.bbox = bbox
self.bbox_p = projections.from4326(bbox, self.proj)
print self.bbox_p
scale = abs(self.w / (self.bbox_p[0] - self.bbox_p[2]) /
math.cos(math.pi *
(self.bbox[1] + self.bbox[3]) / 2 / 180))
zscale = 0.5 * scale
cr = cairo.Context(self.surface)
# getting and setting canvas properties
bgs = style.get_style("canvas", {}, self.zoom, scale, zscale)
if not bgs:
bgs = [{}]
bgs = bgs[0]
cr.rectangle(0, 0, self.w, self.h)
# canvas color and opcity
color = bgs.get("fill-color", (0.7, 0.7, 0.7))
cr.set_source_rgba(color[0], color[1], color[2],
bgs.get("fill-opacity", 1))
cr.fill()
callback()
# canvas antialiasing
antialias = bgs.get("antialias", "full")
if antialias == "none":
"no antialiasing enabled"
cr.set_antialias(1)
#cr.font_options_set_antialias(1)
elif antialias == "text":
"only text antialiased"
cr.set_antialias(1)
#cr.font_options_set_antialias(2)
else:
"full antialias"
cr.set_antialias(2)
#cr.font_options_set_antialias(2)
datatimer = Timer("Asking backend")
if "get_sql_hints" in dir(style):
hints = style.get_sql_hints('way', self.zoom)
else:
hints = None
if "get_interesting_tags" in dir(style):
itags = style.get_interesting_tags(zoom=self.zoom)
else:
itags = None
# enlarge bbox by 20% to each side. results in more vectors, but makes less artifaces.
span_x, span_y = bbox[2] - bbox[0], bbox[3] - bbox[1]
bbox_expand = [
bbox[0] - 0.2 * span_x, bbox[1] - 0.2 * span_y,
bbox[2] + 0.2 * span_x, bbox[3] + 0.2 * span_y
]
vectors = self.data.get_vectors(bbox_expand, self.zoom, hints,
itags).values()
datatimer.stop()
datatimer = Timer("Applying styles")
ww = []
for way in vectors:
type = "line"
if way.coords[0] == way.coords[-1]:
type == "area"
st = style.get_style("area", way.tags, self.zoom, scale, zscale)
if st:
for fpt in st:
#debug(fpt)
ww.append([way.copy(), fpt])
datatimer.stop()
debug("%s objects on screen (%s in dataset)" % (len(ww), len(vectors)))
er = Timer("Projecing data")
if self.data.proj != self.proj:
for w in ww:
w[0].cs = [
self.lonlat2screen(coord)
for coord in projections.transform(
w[0].coords, self.data.proj, self.proj)
]
else:
for w in ww:
w[0].cs = [self.lonlat2screen(coord) for coord in w[0].coords]
for w in ww:
if "offset" in w[1]:
offset = float(w[1]["offset"])
w[0] = w[0].copy()
w[0].cs = offset_line(w[0].cs, offset)
if "raise" in w[1] and not "extrude" in w[1]:
w[0] = w[0].copy()
offset = float(w[1]["raise"])
w[0].cs_real = w[0].cs
w[0].cs = [(x, y - offset) for x, y in w[0].cs]
if "extrude" in w[1]:
if w[1]["extrude"] < 2:
del w[1]["extrude"]
if "extrude" in w[1] and "fill-color" not in w[1] and "width" in w[
1]:
w[1]["fill-color"] = w[1].get("color", (0, 0, 0))
w[1]["fill-opacity"] = w[1].get("opacity", 1)
w[0] = w[0].copy()
#print w[0].cs
w[0].cs = offset_line(w[0].cs, w[1]["width"] / 2)
#print w[0].cs
aa = offset_line(w[0].cs, -w[1]["width"])
del w[1]["width"]
aa.reverse()
w[0].cs.extend(aa)
er.stop()
ww.sort(key=lambda x: x[1]["layer"])
layers = list(set([int(x[1]["layer"] / 100.) for x in ww]))
layers.sort()
objs_by_layers = {}
for layer in layers:
objs_by_layers[layer] = []
for obj in ww:
objs_by_layers[int(obj[1]["layer"] / 100.)].append(obj)
del ww
timer.stop()
timer = Timer("Rasterizing image")
linecaps = {"butt": 0, "round": 1, "square": 2}
linejoin = {"miter": 0, "round": 1, "bevel": 2}
text_rendered_at = set([(-100, -100)])
for layer in layers:
data = objs_by_layers[layer]
#data.sort(lambda x,y:cmp(max([x1[1] for x1 in x[0].cs]), max([x1[1] for x1 in y[0].cs])))
# - fill polygons
for obj in data:
if ("fill-color" in obj[1] or "fill-image" in obj[1]
) and not "extrude" in obj[1]: ## TODO: fill-image
color = obj[1].get("fill-color", (0, 0, 0))
cr.set_source_rgba(color[0], color[1], color[2],
obj[1].get("fill-opacity", 1))
if "fill-image" in obj[1]:
image = style.cache["image"][obj[1]["fill-image"]]
if image:
pattern = cairo.SurfacePattern(image)
pattern.set_extend(cairo.EXTEND_REPEAT)
cr.set_source(pattern)
poly(cr, obj[0].cs)
# - draw casings on layer
for obj in data:
### Extras: casing-linecap, casing-linejoin
if "casing-width" in obj[1] or "casing-color" in obj[
1] and "extrude" not in obj[1]:
cr.set_dash(obj[1].get("casing-dashes",
obj[1].get("dashes", [])))
cr.set_line_join(
linejoin.get(
obj[1].get("casing-linejoin",
obj[1].get("linejoin", "round")), 1))
color = obj[1].get("casing-color", (0, 0, 0))
cr.set_source_rgba(color[0], color[1], color[2],
obj[1].get("casing-opacity", 1))
## TODO: good combining of transparent lines and casing
## Probable solution: render casing, render way as mask and put casing with mask chopped out onto image
cr.set_line_width(obj[1].get("width", 0) +
obj[1].get("casing-width", 1))
cr.set_line_cap(
linecaps.get(
obj[1].get("casing-linecap",
obj[1].get("linecap", "butt")), 0))
line(cr, obj[0].cs)
# - draw line centers
for obj in data:
if ("width" in obj[1] or "color" in obj[1]
or "image" in obj[1]) and "extrude" not in obj[1]:
cr.set_dash(obj[1].get("dashes", []))
cr.set_line_join(
linejoin.get(obj[1].get("linejoin", "round"), 1))
color = obj[1].get("color", (0, 0, 0))
cr.set_source_rgba(color[0], color[1], color[2],
obj[1].get("opacity", 1))
## TODO: better overlapping of transparent lines.
## Probable solution: render them (while they're of the same opacity and layer) on a temporary canvas that's merged into main later
cr.set_line_width(obj[1].get("width", 1))
cr.set_line_cap(
linecaps.get(obj[1].get("linecap", "butt"), 0))
if "image" in obj[1]:
image = style.cache["image"][obj[1]["image"]]
if image:
pattern = cairo.SurfacePattern(image)
pattern.set_extend(cairo.EXTEND_REPEAT)
cr.set_source(pattern)
line(cr, obj[0].cs)
callback()
# - extruding polygons
#data.sort(lambda x,y:cmp(max([x1[1] for x1 in x[0].cs]), max([x1[1] for x1 in y[0].cs])))
# Pass 1. Creating list of extruded polygons
extlist = []
# fromat: (coords, ("h"/"v", y,z), real_obj)
for obj in data:
if "extrude" in obj[1]:
def face_to_poly(face, hgt):
"""
Converts a line into height-up extruded poly
"""
return [
face[0], face[1], (face[1][0], face[1][1] - hgt),
(face[0][0], face[0][1] - hgt), face[0]
]
hgt = obj[1]["extrude"]
raised = float(obj[1].get("raise", 0))
excoords = [(a[0], a[1] - hgt - raised) for a in obj[0].cs]
faces = []
coord = obj[0].cs[-1]
#p_coord = (coord[0],coord[1]-raised)
p_coord = False
for coord in obj[0].cs:
c = (coord[0], coord[1] - raised)
if p_coord:
extlist.append((face_to_poly([c, p_coord], hgt),
("v", min(coord[1],
p_coord[1]), hgt), obj))
p_coord = c
extlist.append(
(excoords, ("h", min(coord[1], p_coord[1]), hgt), obj))
#faces.sort(lambda x,y:cmp(max([x1[1] for x1 in x]), max([x1[1] for x1 in y])))
# Pass 2. Sorting
def compare_things(a, b):
"""
Custom comparator for extlist sorting.
Sorts back-to-front, bottom-to-top, | > \ > _, horizontal-to-vertical.
"""
t1, t2 = a[1], b[1] #
if t1[1] > t2[1]: # back-to-front
return 1
if t1[1] < t2[1]:
return -1
if t1[2] > t2[2]: # bottom-to-top
return 1
if t1[2] < t2[2]:
return -1
if t1[0] < t2[0]: # h-to-v
return 1
if t1[0] > t2[0]:
return -1
return cmp(
math.sin(
math.atan2(a[0][0][0] - a[0][1][0],
a[0][0][0] - a[0][1][0])),
math.sin(
math.atan2(b[0][0][0] - b[0][1][0],
b[0][0][0] - b[0][1][0])))
print t1
print t2
extlist.sort(compare_things)
# Pass 3. Rendering using painter's algorythm
cr.set_dash([])
for ply, prop, obj in extlist:
if prop[0] == "v":
color = obj[1].get("extrude-face-color",
obj[1].get("color", (0, 0, 0)))
cr.set_source_rgba(
color[0], color[1], color[2],
obj[1].get("extrude-face-opacity",
obj[1].get("opacity", 1)))
poly(cr, ply)
color = obj[1].get("extrude-edge-color",
obj[1].get("color", (0, 0, 0)))
cr.set_source_rgba(
color[0], color[1], color[2],
obj[1].get("extrude-edge-opacity",
obj[1].get("opacity", 1)))
cr.set_line_width(.5)
line(cr, ply)
if prop[0] == "h":
if "fill-color" in obj[1]:
color = obj[1]["fill-color"]
cr.set_source_rgba(
color[0], color[1], color[2],
obj[1].get("fill-opacity",
obj[1].get("opacity", 1)))
poly(cr, ply)
color = obj[1].get("extrude-edge-color",
obj[1].get("color", (0, 0, 0)))
cr.set_source_rgba(
color[0], color[1], color[2],
obj[1].get("extrude-edge-opacity",
obj[1].get("opacity", 1)))
cr.set_line_width(1)
line(cr, ply)
#cr.set_line_width (obj[1].get("width", 1))
#color = obj[1].get("color", (0,0,0) )
#cr.set_source_rgba(color[0], color[1], color[2], obj[1].get("extrude-edge-opacity", obj[1].get("opacity", 1)))
#line(cr,excoords)
#if "fill-color" in obj[1]:
#color = obj[1]["fill-color"]
#cr.set_source_rgba(color[0], color[1], color[2], obj[1].get("fill-opacity", 1))
#poly(cr,excoords)
for obj in data:
if "icon-image" in obj[1]:
image = style.cache["image"][obj[1]["icon-image"]]
if image:
dy = image.get_height() / 2
dx = image.get_width() / 2
where = self.lonlat2screen(
projections.transform(obj[0].center,
self.data.proj, self.proj))
cr.set_source_surface(image, where[0] - dx,
where[1] - dy)
cr.paint()
callback()
# - render text labels
texttimer = Timer("Text rendering")
cr.set_line_join(
1
) # setting linejoin to "round" to get less artifacts on halo render
for obj in data:
if "text" in obj[1]:
text = obj[1]["text"]
#cr.set_line_width (obj[1].get("width", 1))
#cr.set_font_size(float(obj[1].get("font-size", 9)))
ft_desc = pango.FontDescription()
ft_desc.set_family(obj[1].get('font-family', 'sans'))
ft_desc.set_size(pango.SCALE *
int(obj[1].get('font-size', 9)))
fontstyle = obj[1].get('font-style', 'normal')
if fontstyle == 'italic':
fontstyle = pango.STYLE_ITALIC
else:
fontstyle = pango.STYLE_NORMAL
ft_desc.set_style(fontstyle)
fontweight = obj[1].get('font-weight', 400)
try:
fontweight = int(fontweight)
except ValueError:
if fontweight == 'bold':
fontweight = 700
else:
fontweight = 400
ft_desc.set_weight(fontweight)
if obj[1].get('text-transform', None) == 'uppercase':
text = text.upper()
p_ctx = pangocairo.CairoContext(cr)
p_layout = p_ctx.create_layout()
p_layout.set_font_description(ft_desc)
p_layout.set_text(text)
p_attrs = pango.AttrList()
decoration = obj[1].get('text-decoration', 'none')
if decoration == 'underline':
p_attrs.insert(
pango.AttrUnderline(pango.UNDERLINE_SINGLE,
end_index=-1))
decoration = obj[1].get('font-variant', 'none')
if decoration == 'small-caps':
p_attrs.insert(
pango.AttrVariant(pango.VARIANT_SMALL_CAPS,
start_index=0,
end_index=-1))
p_layout.set_attributes(p_attrs)
if obj[1].get("text-position", "center") == "center":
where = self.lonlat2screen(
projections.transform(obj[0].center,
self.data.proj, self.proj))
for t in text_rendered_at:
if ((t[0] - where[0])**2 +
(t[1] - where[1])**2) < 15 * 15:
break
else:
text_rendered_at.add(where)
#debug ("drawing text: %s at %s"%(text, where))
if "text-halo-color" in obj[
1] or "text-halo-radius" in obj[1]:
cr.new_path()
cr.move_to(where[0], where[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])
cr.text_path(text)
cr.stroke()
cr.new_path()
cr.move_to(where[0], where[1])
cr.set_line_width(obj[1].get(
"text-halo-radius", 1))
color = obj[1].get("text-color", (0., 0., 0.))
cr.set_source_rgb(color[0], color[1], color[2])
cr.text_path(text)
cr.fill()
else: ### render text along line
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", 1.5) * 2)
color = obj[1].get("text-halo-color",
(1., 1., 1.))
cr.set_source_rgb(color[0], color[1], color[2])
xy = get_xy_from_len(c, z)
cr.save()
#cr.move_to(xy[0],xy[1])
p_ctx.translate(xy[0], xy[1])
cr.rotate(xy[2] + da)
#p_ctx.translate(x,y)
#p_ctx.show_layout(p_layout)
p_ctx.layout_path(p_layout)
cr.restore()
cr.stroke()
#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
xy = get_xy_from_len(c, z)
cr.save()
#cr.move_to(xy[0],xy[1])
p_ctx.translate(xy[0], xy[1])
cr.rotate(xy[2] + da)
#p_ctx.translate(x,y)
p_ctx.show_layout(p_layout)
cr.restore()
#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()
del data
del layers
timer.stop()
rendertimer.stop()
debug(self.bbox)
callback(True)