8000 Add RGB565 format support by philsuth · Pull Request #48 · adafruit/Adafruit_CircuitPython_framebuf · GitHub
[go: up one dir, main page]
Skip to content

Add RGB565 format support #48

New issue

Have a question about th 8000 is project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 7 commits into from
Dec 19, 2022
Merged

Add RGB565 format support #48

Changes from all commits
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
5b1b4f2
Initial working version of rgb565 format extension
philsuth Nov 25, 2022
d3a74b3
WIP checkin - format improvements
philsuth Nov 25, 2022
ad9c752
Code blacked
philsuth Nov 25, 2022
7090f0d
Perform some small optimizations
philsuth Dec 2, 2022
8436072
Merge remote-tracking branch 'origin/main' into rgb565
philsuth Dec 2, 2022
3befa99
Fix pylint issues
philsuth Dec 2, 2022
3db43b3
Break too-long line
philsuth Dec 2, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
8000
Diff view
Diff view
55 changes: 54 additions & 1 deletion adafruit_framebuf.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -126,6 +126,57 @@ def fill_rect(framebuf, x, y, width, height, color):
height -= 1


class RGB565Format:
"""
This class implements the RGB565 format
It assumes a little-endian byte order in the frame buffer
"""

@staticmethod
def color_to_rgb565(color):
"""Convert a color in either tuple or 24 bit integer form to RGB565,
and return as two bytes"""
if isinstance(color, tuple):
hibyte = (color[0] & 0xF8) | (color[1] >> 5)
lobyte = ((color[1] << 5) & 0xE0) | (color[2] >> 3)
else:
hibyte = ((color >> 16) & 0xF8) | ((color >> 13) & 0x07)
lobyte = ((color >> 5) & 0xE0) | ((color >> 3) & 0x1F)
return bytes([lobyte, hibyte])

def set_pixel(self, framebuf, x, y, color):
"""Set a given pixel to a color."""
index = (y * framebuf.stride + x) * 2
framebuf.buf[index : index + 2] = self.color_to_rgb565(color)

@staticmethod
def get_pixel(framebuf, x, y):
"""Get the color of a given pixel"""
index = (y * framebuf.stride + x) * 2
lobyte, hibyte = framebuf.buf[index : index + 2]
r = hibyte & 0xF8
g = ((hibyte & 0x07) << 5) | ((lobyte & 0xE0) >> 5)
b = (lobyte & 0x1F) << 3
return (r << 16) | (g << 8) | b

def fill(self, framebuf, color):
"""completely fill/clear the buffer with a color"""
rgb565_color = self.color_to_rgb565(color)
for i in range(0, len(framebuf.buf), 2):
framebuf.buf[i : i + 2] = rgb565_color

def fill_rect(self, framebuf, x, y, width, height, color):
"""Draw a rectangle at the given location, size and color. The ``fill_rect`` method draws
both the outline and interior."""
# pylint: disable=too-many-arguments
rgb565_color = self.color_to_rgb565(color)
for _y in range(2 * y, 2 * (y + height), 2):
offset2 = _y * framebuf.stride
for _x in range(2 * x, 2 * (x + width), 2):
index = offset2 + _x
framebuf.buf[index : index + 2] = rgb565_color


class RGB888Format:
"""RGB888Format"""

Expand Down Expand Up @@ -203,6 +254,8 @@ def __init__(self, buf, width, height, buf_format=MVLSB, stride=None):
self.format = MHMSBFormat()
elif buf_format == RGB888:
self.format = RGB888Format()
elif buf_format == RGB565:
self.format = RGB565Format()
else:
raise ValueError("invalid format")
self._rotation = 0
Expand Down Expand Up @@ -419,7 +472,7 @@ def image(self, img):
if self.rotation in (1, 3):
width, height = height, width

if isinstance(self.format, RGB888Format) and img.mode != "RGB":
if isinstance(self.format, (RGB565Format, RGB888Format)) and img.mode != "RGB":
raise ValueError("Image must be in mode RGB.")
if isinstance(self.format, (MHMSBFormat, MVLSBFormat)) and img.mode != "1":
raise ValueError("Image must be in mode 1.")
Expand Down
0