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implemented scroll method to framebuf (2nd attempt) #13

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Merged
merged 4 commits into from
Feb 3, 2019
Merged

implemented scroll method to framebuf (2nd attempt) #13

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cad680a
implemented scroll method to framebuf (2nd attempt)
Feb 3, 2019
a3aa5b6
fixed bad-continuation
Feb 3, 2019
efc7d05
Update adafruit_framebuf.py
Feb 3, 2019
b2827a2
Update adafruit_framebuf.py
Feb 3, 2019
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28 changes: 25 additions & 3 deletions adafruit_framebuf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -252,9 +252,31 @@ def blit(self):
"""blit is not yet implemented"""
raise NotImplementedError()

def scroll(self):
"""scroll is not yet implemented"""
raise NotImplementedError()
def scroll(self, delta_x, delta_y):
"""shifts framebuf in x and y direction"""
if delta_x < 0:
shift_x = 0
xend = self.width + delta_x
dt_x = 1
else:
shift_x = self.width - 1
xend = delta_x - 1
dt_x = -1
if delta_y < 0:
y = 0
yend = self.height + delta_y
dt_y = 1
else:
y = self.height - 1
yend = delta_y - 1
dt_y = -1
while y != yend:
x = shift_x
while x != xend:
self.format.set_pixel(
self, x, y, self.format.get_pixel(self, x - delta_x, y - delta_y))
x += dt_x
y += dt_y

def text(self, string, x, y, color, *,
font_name="font5x8.bin"):
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