def on_adjustment_changed(self, adj):
"""
Change the transformation matrix of the view to reflect the
value of the x/y adjustment (scrollbar).
"""
if adj.value == 0.0: return
# Can not use self._matrix.translate( - adj.value , 0) here, since
# the translate method effectively does a m * self._matrix, which
# will result in the translation being multiplied by the orig. matrix
m = Matrix()
if adj is self._hadjustment:
m.translate(-adj.value, 0)
elif adj is self._vadjustment:
m.translate(0, -adj.value)
self._matrix *= m
# Force recalculation of the bounding boxes:
self.request_update((), self._canvas.get_all_items())
self.queue_draw_refresh()
def on_adjustment_changed(self, adj):
"""
Change the transformation matrix of the view to reflect the
value of the x/y adjustment (scrollbar).
"""
if adj.value == 0.0: return
# Can not use self._matrix.translate( - adj.value , 0) here, since
# the translate method effectively does a m * self._matrix, which
# will result in the translation being multiplied by the orig. matrix
m = Matrix()
if adj is self._hadjustment:
m.translate( - adj.value, 0)
elif adj is self._vadjustment:
m.translate(0, - adj.value)
self._matrix *= m
# Force recalculation of the bounding boxes:
self.request_update((), self._canvas.get_all_items())
self.queue_draw_refresh()
y0 = H//2 + (random.uniform()-.1)*50
for dx,dy in spiral():
c = .25+.75*random.random()
x = int(x0+dx)
y = int(y0+dy)
checked = False
I.flush()
if not (x <= w//2 or y <= h//2 or x >= (W-w//2) or y >= (H-h//2)):
ndI = ndarray(shape=(h,w), buffer=I.get_data(), dtype=ubyte, order='C',
offset=(x-w//2) + I.get_stride() * (y-h//2),
strides=[I.get_stride(), 1])
ndL = ndarray(shape=(h,w), buffer=L.get_data(), dtype=ubyte, order='C',
strides=[L.get_stride(), 1])
if ((ndI * ndL).sum() == 0):
checked = True
new_region = RectangleInt(x-w//2, y-h//2, w, h)
if (checked or ( drawn_regions.contains_rectangle(new_region) == REGION_OVERLAP_OUT )):
ctxI.set_source_surface(L, 0, 0)
pattern = ctxI.get_source()
scalematrix = Matrix()
scalematrix.scale(1.0,1.0)
scalematrix.translate(w//2 - x, h//2 - y)
pattern.set_matrix(scalematrix)
ctxI.set_source_rgba(c,c,c,c)
ctxI.mask(pattern)
drawn_regions.union(new_region)
break
I.flush()
I.write_to_png("wordle-cairo.png")
Image.open("wordle-cairo.png").show()
"For python 3.x, you need pycairo >= 1.11+ (from https://github.com/pygobject/pycairo)"
)
# 255 * 2**24 = opaque
ndI[:, :] = 255 * 2**24 + ndR[:, :] * 2**16 + ndG[:, :] * 2**8 + ndB[:, :]
I.mark_dirty()
surface = ImageSurface(FORMAT_ARGB32, 800, 600)
ctx = Context(surface)
ctx.set_source_surface(I, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scale = 480.0 / rows
scalematrix = Matrix()
scalematrix.scale(1.0 / scale, 1.0 / scale)
scalematrix.translate(-(400.0 - width * scale / 2.0) + 200, -60)
pattern.set_matrix(scalematrix)
ctx.paint()
# we need this later for shifting the taller LCD_V glyph up.
rows_old = rows
# LCD_V
face.load_char('S', FT_LOAD_RENDER | FT_LOAD_TARGET_LCD_V)
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows // 3
pitch = face.glyph.bitmap.pitch
copybuffer = (c_ubyte * (pitch * face.glyph.bitmap.rows))()
memmove(pointer(copybuffer), bitmap._FT_Bitmap.buffer,
pitch * face.glyph.bitmap.rows)
except NotImplementedError:
raise SystemExit("For python 3.x, you need pycairo >= 1.11+ (from https://github.com/pygobject/pycairo)")
# 255 * 2**24 = opaque
ndI[:,:] = 255 * 2**24 + ndR[:,:] * 2**16 + ndG[:,:] * 2**8 + ndB[:,:]
I.mark_dirty()
surface = ImageSurface(FORMAT_ARGB32, 800, 600)
ctx = Context(surface)
ctx.set_source_surface(I, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scale = 480.0 / rows
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(400.0 - width *scale /2.0 )+200, -60)
pattern.set_matrix(scalematrix)
ctx.paint()
# we need this later for shifting the taller LCD_V glyph up.
rows_old = rows
# LCD_V
face.load_char('S', FT_LOAD_RENDER |
FT_LOAD_TARGET_LCD_V )
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows//3
pitch = face.glyph.bitmap.pitch
copybuffer = (c_ubyte * (pitch * face.glyph.bitmap.rows))()
memmove(pointer(copybuffer), bitmap._FT_Bitmap.buffer,
# fill background as gray
ctx.rectangle(0,0,1200,500)
ctx.set_source_rgb (0.5 , 0.5, 0.5)
ctx.fill()
# use the stroked font's size as scale, as it is likely slightly larger
scale = 400.0 / rowsZ
# draw bitmap first
ctx.set_source_surface(F, 0, 0)
patternF = ctx.get_source()
SurfacePattern.set_filter(patternF, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(600.0 - widthF *scale /2.0 ), -50)
patternF.set_matrix(scalematrix)
ctx.set_source_rgb (1 , 1, 0)
ctx.mask(patternF)
ctx.fill()
scalematrix.translate(+400,0)
patternF.set_matrix(scalematrix)
ctx.mask(patternF)
ctx.fill()
# stroke on top
ctx.set_source_surface(Z, 0, 0)
patternZ = ctx.get_source()
SurfacePattern.set_filter(patternZ, FILTER_BEST)
VERTS[i + 1][0],
VERTS[i + 1][1])
i += 2
elif (CODES[i] == CURVE4):
ctx.curve_to(VERTS[i][0], VERTS[i][1], VERTS[i + 1][0],
VERTS[i + 1][1], VERTS[i + 2][0], VERTS[i + 2][1])
i += 3
ctx.fill_preserve()
ctx.set_source_rgb(0, 0, 0)
ctx.set_line_width(6)
ctx.stroke()
ctx.restore()
scale2 = (height_s - 2.0 * MARGIN) / rows
ctx.set_source_surface(Z, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0 / scale2, 1.0 / scale2)
scalematrix.translate(-(width_s / 2.0 - width * scale2 / 2.0), -MARGIN)
pattern.set_matrix(scalematrix)
ctx.set_source_rgba(0, 0, 0, 0.7)
ctx.mask(pattern)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-vector-2-cairo.png")
surface.finish()
Image.open("glyph-vector-2-cairo.png").show()
# fill background as gray
ctx.rectangle(0, 0, 1200, 500)
ctx.set_source_rgb(0.5, 0.5, 0.5)
ctx.fill()
# use the stroked font's size as scale, as it is likely slightly larger
scale = 400.0 / rowsZ
# draw bitmap first
ctx.set_source_surface(F, 0, 0)
patternF = ctx.get_source()
SurfacePattern.set_filter(patternF, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0 / scale, 1.0 / scale)
scalematrix.translate(-(600.0 - widthF * scale / 2.0), -50)
patternF.set_matrix(scalematrix)
ctx.set_source_rgb(1, 1, 0)
ctx.mask(patternF)
ctx.fill()
scalematrix.translate(+400, 0)
patternF.set_matrix(scalematrix)
ctx.mask(patternF)
ctx.fill()
# stroke on top
ctx.set_source_surface(Z, 0, 0)
patternZ = ctx.get_source()
SurfacePattern.set_filter(patternZ, FILTER_BEST)
face.load_char('S', FT_LOAD_RENDER | FT_LOAD_TARGET_MONO)
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows
pitch = face.glyph.bitmap.pitch
glyph_surface = make_image_surface(face.glyph.bitmap)
surface = ImageSurface(FORMAT_ARGB32, 800, 600)
ctx = Context(surface)
ctx.rectangle(0, 0, 800, 600)
ctx.set_line_width(0)
ctx.set_source_rgb(0.5, 0.5, 0.5)
ctx.fill()
#
scale = 480.0 / rows
ctx.set_source_surface(glyph_surface, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0 / scale, 1.0 / scale)
scalematrix.translate(-(400.0 - width * scale / 2.0), -60)
pattern.set_matrix(scalematrix)
ctx.set_source_rgb(0, 0, 1)
ctx.mask(pattern)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-mono+alpha-cairo.png")
Image.open("glyph-mono+alpha-cairo.png").show()
FT_LOAD_TARGET_MONO )
bitmap = face.glyph.bitmap
width = face.glyph.bitmap.width
rows = face.glyph.bitmap.rows
pitch = face.glyph.bitmap.pitch
glyph_surface = make_image_surface(face.glyph.bitmap)
surface = ImageSurface(FORMAT_ARGB32, 800, 600)
ctx = Context(surface)
ctx.rectangle(0,0,800,600)
ctx.set_line_width(0)
ctx.set_source_rgb (0.5 , 0.5, 0.5)
ctx.fill()
#
scale = 480.0 / rows
ctx.set_source_surface(glyph_surface, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(400.0 - width *scale /2.0 ), -60)
pattern.set_matrix(scalematrix)
ctx.set_source_rgb (0 , 0, 1)
ctx.mask(pattern)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-mono+alpha-cairo.png")
Image.open("glyph-mono+alpha-cairo.png").show()
face = Face('./Vera.ttf')
face.set_char_size( 4*48*64 )
flags = FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP
face.load_char('S', flags )
slot = face.glyph
glyph = slot.get_glyph()
stroker = Stroker( )
stroker.set(64, FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0 )
glyph.stroke( stroker , True )
blyph = glyph.to_bitmap(FT_RENDER_MODE_NORMAL, Vector(0,0), True )
bitmap = blyph.bitmap
width, rows, pitch = bitmap.width, bitmap.rows, bitmap.pitch
surface = ImageSurface(FORMAT_ARGB32, 600, 800)
ctx = Context(surface)
Z = make_image_surface(bitmap)
ctx.set_source_surface(Z, 0, 0)
scale = 640.0 / rows
patternZ = ctx.get_source()
SurfacePattern.set_filter(patternZ, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale,1.0/scale)
scalematrix.translate(-(300.0 - width *scale /2.0 ), -80)
patternZ.set_matrix(scalematrix)
ctx.set_source_rgb (0 , 0, 1)
ctx.mask(patternZ)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-outline-cairo.png")
Image.open("glyph-outline-cairo.png").show()
i += 2
elif (CODES[i] == CURVE4):
ctx.curve_to(VERTS[i][0],VERTS[i][1],
VERTS[i+1][0],VERTS[i+1][1],
VERTS[i+2][0],VERTS[i+2][1])
i += 3
ctx.fill_preserve()
ctx.set_source_rgb(0,0,0)
ctx.set_line_width(6)
ctx.stroke()
ctx.restore()
scale2 = (height_s - 2.0 * MARGIN)/rows
ctx.set_source_surface(Z, 0, 0)
pattern = ctx.get_source()
SurfacePattern.set_filter(pattern, FILTER_BEST)
scalematrix = Matrix()
scalematrix.scale(1.0/scale2, 1.0/scale2)
scalematrix.translate(-( width_s/2.0 - width *scale2 /2.0 ), -MARGIN)
pattern.set_matrix(scalematrix)
ctx.set_source_rgba (0, 0, 0, 0.7)
ctx.mask(pattern)
ctx.fill()
surface.flush()
surface.write_to_png("glyph-vector-2-cairo.png")
surface.finish()
Image.open("glyph-vector-2-cairo.png").show()