def tostring(surface, format, flipped=False):
""" tostring(Surface, format, flipped=False) -> string
transfer image to string buffer
"""
surf = surface._c_surface
if surf.flags & sdl.SDL_OPENGL:
raise NotImplementedError()
if format == "P":
if surf.format.BytesPerPixel != 1:
raise ValueError("Can only create \"P\" format data with "
"8bit Surfaces")
with locked(surf):
string = ffi.buffer(ffi.cast('char*', surf.pixels))[:]
else:
_tostring = globals().get('_tostring_%s' % format, None)
if _tostring is None:
raise ValueError("Unrecognized type of format")
with locked(surf):
string = _tostring(surf, flipped)
return string
def tostring(surface, format, flipped=False):
""" tostring(Surface, format, flipped=False) -> string
transfer image to string buffer
"""
surf = surface._c_surface
if surf.flags & sdl.SDL_OPENGL:
raise NotImplementedError()
if format == "P":
if surf.format.BytesPerPixel != 1:
raise ValueError("Can only create \"P\" format data with "
"8bit Surfaces")
with locked(surf):
string = ffi.buffer(ffi.cast('char*', surf.pixels))[:]
else:
_tostring = globals().get('_tostring_%s' % format, None)
if _tostring is None:
raise ValueError("Unrecognized type of format")
with locked(surf):
string = _tostring(surf, flipped)
return string
def _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
if radius_x == 0 and radius_y == 0:
with locked(surface._c_surface):
surface._set_at(c_x, c_y, c_color)
return True
elif radius_x == 0:
# vertical line
_drawvertline(surface, c_color, c_y - radius_y, c_y + radius_y, c_x)
return True
elif radius_y == 0:
_drawhorizline(surface, c_color, c_x - radius_x, c_x + radius_x, c_y)
return True
return False
def polygon(surface, color, points, width=0):
_check_surface(surface)
if width != 0:
return lines(surface, color, 1, points, width)
c_color = create_color(color, surface._format)
points = _check_and_filter_points(points, 3)
with locked(surface._c_surface):
_draw_fillpoly(surface, points, c_color)
return _make_drawn_rect(points, surface)
def _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
if radius_x == 0 and radius_y == 0:
with locked(surface._c_surface):
surface._set_at(c_x, c_y, c_color)
return True
elif radius_x == 0:
# vertical line
_drawvertline(surface, c_color, c_y - radius_y, c_y + radius_y, c_x)
return True
elif radius_y == 0:
_drawhorizline(surface, c_color, c_x - radius_x, c_x + radius_x, c_y)
return True
return False
def polygon(surface, color, points, width=0):
_check_surface(surface)
if width != 0:
return lines(surface, color, 1, points, width)
c_color = create_color(color, surface._format)
points = _check_and_filter_points(points, 3)
with locked(surface._c_surface):
_draw_fillpoly(surface, points, c_color)
return _make_drawn_rect(points, surface)
def _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
if radius_x == 0 and radius_y == 0:
clip = surface.get_clip()
# Throw away points outside the clip area
if c_x < clip.x or c_x > (clip.x + clip.w):
return True
if c_y < clip.y or c_y > (clip.y + clip.h):
return True
with locked(surface._c_surface):
surface._set_at(c_x, c_y, c_color)
return True
elif radius_x == 0:
# vertical line
_drawvertline(surface, c_color, c_y - radius_y, c_y + radius_y, c_x)
return True
elif radius_y == 0:
_drawhorizline(surface, c_color, c_x - radius_x, c_x + radius_x, c_y)
return True
return False
def _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
if radius_x == 0 and radius_y == 0:
clip = surface.get_clip()
# Throw away points outside the clip area
if c_x < clip.x or c_x >= (clip.x + clip.w):
return True
if c_y < clip.y or c_y >= (clip.y + clip.h):
return True
with locked(surface._c_surface):
surface._set_at(c_x, c_y, c_color)
return True
elif radius_x == 0:
# vertical line
_drawvertline(surface, c_color, c_y - radius_y, c_y + radius_y, c_x)
return True
elif radius_y == 0:
_drawhorizline(surface, c_color, c_x - radius_x, c_x + radius_x, c_y)
return True
return False
def line(surface, color, start, end, width=1):
_check_surface(surface)
c_color = create_color(color, surface._format)
_check_point(start, "Invalid start position argument")
_check_point(end, "Invalid end position argument")
[start] = _check_and_filter_points([start])
[end] = _check_and_filter_points([end])
if width < 1:
return Rect(start, (0, 0))
with locked(surface._c_surface):
drawn = _clip_and_draw_line_width(surface, c_color, width, start, end)
if drawn is None:
return Rect(start, (0, 0))
return drawn
def line(surface, color, start, end, width=1):
_check_surface(surface)
c_color = create_color(color, surface._format)
_check_point(start, "Invalid start position argument")
_check_point(end, "Invalid end position argument")
[start] = _check_and_filter_points([start])
[end] = _check_and_filter_points([end])
if width < 1:
return Rect(start, (0, 0))
with locked(surface._c_surface):
drawn = _clip_and_draw_line_width(surface, c_color, width, start, end)
if drawn is None:
return Rect(start, (0, 0))
return drawn
def lines(surface, color, closed, points, width=1):
_check_surface(surface)
c_color = create_color(color, surface._format)
points = _check_and_filter_points(points, 2)
drawn_points = set()
with locked(surface._c_surface):
start_point = points[0]
for point in points[1:]:
drawn = _clip_and_draw_line_width(surface, c_color, width,
start_point, point)
if drawn is not None:
drawn_points.add(drawn.topleft)
drawn_points.add(drawn.bottomright)
start_point = point
if closed and len(points) > 2:
_clip_and_draw_line_width(surface, c_color, width, points[0],
points[-1])
return _make_drawn_rect(drawn_points, surface)
def lines(surface, color, closed, points, width=1):
_check_surface(surface)
c_color = create_color(color, surface._format)
points = _check_and_filter_points(points, 2)
drawn_points = set()
with locked(surface._c_surface):
start_point = points[0]
for point in points[1:]:
drawn = _clip_and_draw_line_width(
surface, c_color, width, start_point, point)
if drawn is not None:
drawn_points.add(drawn.topleft)
drawn_points.add(drawn.bottomright)
start_point = point
if closed and len(points) > 2:
_clip_and_draw_line_width(
surface, c_color, width, points[0], points[-1])
return _make_drawn_rect(drawn_points, surface)
def _fillellipse(surface, pos, radius_x, radius_y, color):
"""Internal helper function
draw a filled ellipse on surface."""
c_surf = surface._c_surface
c_x, c_y = pos
c_color = create_color(color, surface._format)
if _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
return
# Draw the filled ellipse
# We inherit this structure from pygame
# We draw by drawing horizontal lines between points, while _ellipse
# is orientated towards creating vertical pairs.
# There are also some annoying other differences between how
# the filled ellipse and hollow ellipse are constructed that makes it
# hard to do both in a single function
# Why, pygame, why?
stop_h = stop_i = stop_j = stop_k = -1
with locked(c_surf):
i = 1
h = 0
if radius_x > radius_y:
ix = 0
iy = radius_x * 64
while i > h:
h = (ix + 8) // 64
i = (iy + 8) // 64
j = (h * radius_y) // radius_x
k = (i * radius_y) // radius_x
if stop_k != k and stop_j != k and k < radius_y:
_drawhorizline(surface, c_color, c_x - h, c_x + h - 1,
c_y - k - 1)
_drawhorizline(surface, c_color, c_x - h, c_x + h - 1,
c_y + k)
stop_k = k
if stop_j != j and stop_k != j and k != j:
_drawhorizline(surface, c_color, c_x - i, c_x + i - 1,
c_y - j - 1)
_drawhorizline(surface, c_color, c_x - i, c_x + i - 1,
c_y + j)
stop_j = j
ix = ix + _c_div(iy, radius_x)
iy = iy - _c_div(ix, radius_x)
else:
ix = 0
iy = radius_y * 64
while i > h:
h = (ix + 8) // 64
i = (iy + 8) // 64
j = (h * radius_x) // radius_y
k = (i * radius_x) // radius_y
if stop_i != i and stop_h != i and i < radius_y:
_drawhorizline(surface, c_color, c_x - j, c_x + j - 1,
c_y - i - 1)
_drawhorizline(surface, c_color, c_x - j, c_x + j - 1,
c_y + i)
stop_i = i
if stop_h != h and stop_i != h and i != h:
_drawhorizline(surface, c_color, c_x - k, c_x + k - 1,
c_y - h - 1)
_drawhorizline(surface, c_color, c_x - k, c_x + k - 1,
c_y + h)
stop_h = h
ix = ix + _c_div(iy, radius_y)
iy = iy - _c_div(ix, radius_y)
def _ellipse(surface, pos, radius_x, radius_y, color):
"""Internal helper function
draw a ellipse with line thickness 1 on surface."""
c_surf = surface._c_surface
c_x, c_y = pos
c_color = create_color(color, surface._format)
if _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
return
# Draw the ellipse
# Pygame's ellipse drawing algorithm appears to come from allegro, via sge
# and SDL_gfxPrimitives. It's known to be non-optimal, but we're aiming
# for pygame compatibility, so we're doing the same thing, much as
# it grates me to do so.
# We assume suitable diligence in terms of the licensing, but allegro's
# zlib'ish license should mean we're OK anyway.
stop_h = stop_i = stop_j = stop_k = -1
bounds = surface.get_bounding_rect()
with locked(c_surf):
i = 1
h = 0
if radius_x > radius_y:
ix = 0
iy = radius_x * 64
while i > h:
h = (ix + 16) // 64
i = (iy + 16) // 64
j = (h * radius_y) // radius_x
k = (i * radius_y) // radius_x
if (stop_k != k
and stop_j != k) or (stop_j != j
and stop_k != k) or (k != j):
plus_x = c_x + h - 1
minus_x = c_x - h
if k > 0:
plus_y = c_y + k - 1
minus_y = c_y - k
if h > 0:
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
stop_k = k
plus_x = c_x + i - 1
minus_x = c_x - i
if j > 0:
plus_y = c_y + j - 1
minus_y = c_y - j
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
stop_j = j
ix = ix + _c_div(iy, radius_x)
iy = iy - _c_div(ix, radius_x)
else:
ix = 0
iy = radius_y * 64
while i > h:
h = (ix + 32) // 64
i = (iy + 32) // 64
j = (h * radius_x) // radius_y
k = (i * radius_x) // radius_y
if (stop_i != i
and stop_h != i) or (stop_i != h
and stop_h != h) or (h != i):
plus_x = c_x + j - 1
minus_x = c_x - j
if i > 0:
plus_y = c_y + i - 1
minus_y = c_y - i
if j > 0:
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
stop_i = i
plus_x = c_x + k - 1
minus_x = c_x - k
if h > 0:
plus_y = c_y + h - 1
minus_y = c_y - h
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
stop_h = h
ix = ix + _c_div(iy, radius_y)
iy = iy - _c_div(ix, radius_y)
raise IOError("PNGError: %s" % ffi.string(err_msg[0]))
return result
def fromstring(string, (w, h), format, flipped=False):
if w < 1 or h < 1:
raise ValueError("Resolution must be positive values")
if format == "P":
if len(string) != w * h:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 8, 0, 0, 0, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast('char*', surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w if flipped else y * w
pixels[dest:dest + w] = string[src_start:src_start + w]
elif format == "RGB":
if len(string) != w * h * 3:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 24, 0xff, 0xff << 16,
0xff << 8, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
raise IOError("PNGError: %s" % ffi.string(err_msg[0]))
return result
def fromstring(string, (w, h), format, flipped=False):
if w < 1 or h < 1:
raise ValueError("Resolution must be positive values")
if format == "P":
if len(string) != w * h:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 8, 0, 0, 0, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast('char*', surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w if flipped else y * w
pixels[dest:dest + w] = string[src_start:src_start + w]
elif format == "RGB":
if len(string) != w * h * 3:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 24, 0xff, 0xff << 16,
0xff << 8, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
def fromstring(string, size, format, flipped=False):
w, h = size
if w < 1 or h < 1:
raise ValueError("Resolution must be positive values")
if format == "P":
if len(string) != w * h:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 8, 0, 0, 0, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast('char*', surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w if flipped else y * w
pixels[dest:dest + w] = string[src_start:src_start + w]
elif format == "RGB":
if len(string) != w * h * 3:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 24, 0xff, 0xff << 16,
0xff << 8, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast("char*", surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w * 3 if flipped else y * w * 3
row = string[src_start:src_start + w * 3]
for x in range(0, w * 3, 3):
# BYTE0, BYTE1 and BYTE2 are determined by byte order
pixels[dest + x + BYTE0] = row[x + BYTE0]
pixels[dest + x + BYTE1] = row[x + BYTE1]
pixels[dest + x + BYTE2] = row[x + BYTE2]
elif format in ("RGBA", "RGBAX", "ARGB"):
if len(string) != w * h * 4:
raise ValueError("String length does not equal format and "
"resolution size")
if format == "ARGB":
if get_sdl_byteorder() == sdl.SDL_LIL_ENDIAN:
rmask, gmask, bmask, amask = (0xff << 8, 0xff << 16,
0xff << 24, 0xff)
else:
rmask, gmask, bmask, amask = (0xff << 16, 0xff << 8,
0xff, 0xff << 24)
surf = sdl.SDL_CreateRGBSurface(sdl.SDL_SRCALPHA, w, h, 32,
rmask, gmask, bmask, amask)
else:
alphamult = format == "RGBA"
if get_sdl_byteorder() == sdl.SDL_LIL_ENDIAN:
rmask, gmask, bmask = 0xff, 0xff << 8, 0xff << 16
amask = 0xff << 24 if alphamult else 0
else:
rmask, gmask, bmask = 0xff << 24, 0xff << 16, 0xff << 8
amask = 0xff if alphamult else 0
surf = sdl.SDL_CreateRGBSurface(sdl.SDL_SRCALPHA if alphamult
else 0, w, h, 32, rmask, gmask,
bmask, amask)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast("char*", surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w * 4 if flipped else y * w * 4
pixels[dest:dest + w * 4] = string[src_start:src_start + w * 4]
else:
raise ValueError("Unrecognized type of format")
return Surface._from_sdl_surface(surf)
def _ellipse(surface, pos, radius_x, radius_y, color):
"""Internal helper function
draw a ellipse with line thickness 1 on surface."""
c_surf = surface._c_surface
c_x, c_y = pos
c_color = create_color(color, surface._format)
if _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
return
# Draw the ellipse
# Pygame's ellipse drawing algorithm appears to come from allegro, via sge
# and SDL_gfxPrimitives. It's known to be non-optimal, but we're aiming
# for pygame compatibility, so we're doing the same thing, much as
# it grates me to do so.
# We assume suitable diligence in terms of the licensing, but allegro's
# zlib'ish license should mean we're OK anyway.
stop_h = stop_i = stop_j = stop_k = -1
bounds = surface.get_bounding_rect()
with locked(c_surf):
i = 1
h = 0
if radius_x > radius_y:
ix = 0
iy = radius_x * 64
while i > h:
h = (ix + 16) // 64
i = (iy + 16) // 64
j = (h * radius_y) // radius_x
k = (i * radius_y) // radius_x
if (stop_k != k and stop_j != k) or (stop_j != j and stop_k != k) or (k != j):
plus_x = c_x + h - 1
minus_x = c_x - h
if k > 0:
plus_y = c_y + k - 1
minus_y = c_y - k
if h > 0:
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
stop_k = k
plus_x = c_x + i - 1
minus_x = c_x - i
if j > 0:
plus_y = c_y + j - 1
minus_y = c_y - j
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
stop_j = j
ix = ix + _c_div(iy, radius_x)
iy = iy - _c_div(ix, radius_x)
else:
ix = 0
iy = radius_y * 64
while i > h:
h = (ix + 32) // 64
i = (iy + 32) // 64
j = (h * radius_x) // radius_y
k = (i * radius_x) // radius_y
if (stop_i != i and stop_h != i) or (stop_i != h and stop_h != h) or (h != i):
plus_x = c_x + j - 1
minus_x = c_x - j
if i > 0:
plus_y = c_y + i - 1
minus_y = c_y - i
if j > 0:
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
stop_i = i
plus_x = c_x + k - 1
minus_x = c_x - k
if h > 0:
plus_y = c_y + h - 1
minus_y = c_y - h
if bounds.collidepoint(plus_x, plus_y):
surface._set_at(plus_x, plus_y, c_color)
if bounds.collidepoint(plus_x, minus_y):
surface._set_at(plus_x, minus_y, c_color)
if bounds.collidepoint(minus_x, plus_y):
surface._set_at(minus_x, plus_y, c_color)
if bounds.collidepoint(minus_x, minus_y):
surface._set_at(minus_x, minus_y, c_color)
stop_h = h
ix = ix + _c_div(iy, radius_y)
iy = iy - _c_div(ix, radius_y)
def fromstring(string, size, format, flipped=False):
w, h = size
if w < 1 or h < 1:
raise ValueError("Resolution must be positive values")
if format == "P":
if len(string) != w * h:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 8, 0, 0, 0, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast('char*', surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w if flipped else y * w
pixels[dest:dest + w] = string[src_start:src_start + w]
elif format == "RGB":
if len(string) != w * h * 3:
raise ValueError("String length does not equal format and "
"resolution size")
surf = sdl.SDL_CreateRGBSurface(0, w, h, 24, 0xff, 0xff << 16,
0xff << 8, 0)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast("char*", surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w * 3 if flipped else y * w * 3
row = string[src_start:src_start + w * 3]
for x in range(0, w * 3, 3):
# BYTE0, BYTE1 and BYTE2 are determined by byte order
pixels[dest + x + BYTE0] = row[x + BYTE0]
pixels[dest + x + BYTE1] = row[x + BYTE1]
pixels[dest + x + BYTE2] = row[x + BYTE2]
elif format in ("RGBA", "RGBAX", "ARGB"):
if len(string) != w * h * 4:
raise ValueError("String length does not equal format and "
"resolution size")
if format == "ARGB":
if get_sdl_byteorder() == sdl.SDL_LIL_ENDIAN:
rmask, gmask, bmask, amask = (0xff << 8, 0xff << 16,
0xff << 24, 0xff)
else:
rmask, gmask, bmask, amask = (0xff << 16, 0xff << 8, 0xff,
0xff << 24)
surf = sdl.SDL_CreateRGBSurface(sdl.SDL_SRCALPHA, w, h, 32, rmask,
gmask, bmask, amask)
else:
alphamult = format == "RGBA"
if get_sdl_byteorder() == sdl.SDL_LIL_ENDIAN:
rmask, gmask, bmask = 0xff, 0xff << 8, 0xff << 16
amask = 0xff << 24 if alphamult else 0
else:
rmask, gmask, bmask = 0xff << 24, 0xff << 16, 0xff << 8
amask = 0xff if alphamult else 0
surf = sdl.SDL_CreateRGBSurface(
sdl.SDL_SRCALPHA if alphamult else 0, w, h, 32, rmask, gmask,
bmask, amask)
if not surf:
raise SDLError.from_sdl_error()
with locked(surf):
pixels = ffi.cast("char*", surf.pixels)
for y in range(h):
dest = surf.pitch * y
src_start = (h - 1 - y) * w * 4 if flipped else y * w * 4
pixels[dest:dest + w * 4] = string[src_start:src_start + w * 4]
else:
raise ValueError("Unrecognized type of format")
return Surface._from_sdl_surface(surf)
def _fillellipse(surface, pos, radius_x, radius_y, color):
"""Internal helper function
draw a filled ellipse on surface."""
c_surf = surface._c_surface
c_x, c_y = pos
c_color = create_color(color, surface._format)
if _check_special_ellipse(surface, c_x, c_y, radius_x, radius_y, c_color):
return
# Draw the filled ellipse
# We inherit this structure from pygame
# We draw by drawing horizontal lines between points, while _ellipse
# is orientated towards creating vertical pairs.
# There are also some annoying other differences between how
# the filled ellipse and hollow ellipse are constructed that makes it
# hard to do both in a single function
# Why, pygame, why?
stop_h = stop_i = stop_j = stop_k = -1
with locked(c_surf):
i = 1
h = 0
if radius_x > radius_y:
ix = 0
iy = radius_x * 64
while i > h:
h = (ix + 8) // 64
i = (iy + 8) // 64
j = (h * radius_y) // radius_x
k = (i * radius_y) // radius_x
if stop_k != k and stop_j != k and k < radius_y:
_drawhorizline(surface, c_color,
c_x - h, c_x + h - 1, c_y - k - 1)
_drawhorizline(surface, c_color,
c_x - h, c_x + h - 1, c_y + k)
stop_k = k
if stop_j != j and stop_k != j and k != j:
_drawhorizline(surface, c_color,
c_x - i, c_x + i - 1, c_y - j - 1)
_drawhorizline(surface, c_color,
c_x - i, c_x + i - 1, c_y + j)
stop_j = j
ix = ix + _c_div(iy, radius_x)
iy = iy - _c_div(ix, radius_x)
else:
ix = 0
iy = radius_y * 64
while i > h:
h = (ix + 8) // 64
i = (iy + 8) // 64
j = (h * radius_x) // radius_y
k = (i * radius_x) // radius_y
if stop_i != i and stop_h != i and i < radius_y:
_drawhorizline(surface, c_color,
c_x - j, c_x + j - 1, c_y - i - 1)
_drawhorizline(surface, c_color,
c_x - j, c_x + j - 1, c_y + i)
stop_i = i
if stop_h != h and stop_i != h and i != h:
_drawhorizline(surface, c_color,
c_x - k, c_x + k - 1, c_y - h - 1)
_drawhorizline(surface, c_color,
c_x - k, c_x + k - 1, c_y + h)
stop_h = h
ix = ix + _c_div(iy, radius_y)
iy = iy - _c_div(ix, radius_y)
