esphome/esphomeyaml/components/image.py
2018-08-22 22:04:56 +02:00

85 lines
2.7 KiB
Python

# coding=utf-8
import logging
import os.path
import voluptuous as vol
import esphomeyaml.config_validation as cv
from esphomeyaml import core
from esphomeyaml.components import display
from esphomeyaml.const import CONF_FILE, CONF_ID, CONF_RESIZE
from esphomeyaml.core import HexInt
from esphomeyaml.helpers import App, ArrayInitializer, MockObj, Pvariable, RawExpression, add
_LOGGER = logging.getLogger(__name__)
DEPENDENCIES = ['display']
Image_ = display.display_ns.Image
def validate_pillow_installed(value):
try:
# pylint: disable=unused-variable
import PIL
except ImportError:
raise vol.Invalid("Please install the pillow python package to use images. "
"(pip2 install pillow)")
return value
def validate_image_file(value):
value = cv.string(value)
path = os.path.join(os.path.dirname(core.CONFIG_PATH), value)
if not os.path.isfile(path):
raise vol.Invalid(u"Could not find file '{}'. Please make sure it exists.".format(path))
return value
CONF_RAW_DATA_ID = 'raw_data_id'
FONT_SCHEMA = vol.Schema({
vol.Required(CONF_ID): cv.declare_variable_id(Image_),
vol.Required(CONF_FILE): validate_image_file,
vol.Optional(CONF_RESIZE): cv.dimensions,
cv.GenerateID(CONF_RAW_DATA_ID): cv.declare_variable_id(None),
})
CONFIG_SCHEMA = vol.All(validate_pillow_installed, cv.ensure_list, [FONT_SCHEMA])
def to_code(config):
from PIL import Image
for conf in config:
path = os.path.join(os.path.dirname(core.CONFIG_PATH), conf[CONF_FILE])
try:
image = Image.open(path)
except Exception as e:
raise core.ESPHomeYAMLError(u"Could not load image file {}: {}".format(path, e))
if CONF_RESIZE in conf:
image.thumbnail(conf[CONF_RESIZE])
image = image.convert('1', dither=Image.NONE)
width, height = image.size
if width > 500 or height > 500:
_LOGGER.warning("The image you requested is very big. Please consider using the resize "
"parameter")
width8 = ((width + 7) // 8) * 8
data = [0 for _ in range(height * width8 // 8)]
for y in range(height):
for x in range(width):
if image.getpixel((x, y)):
continue
pos = x + y * width8
data[pos // 8] |= 0x80 >> (pos % 8)
raw_data = MockObj(conf[CONF_RAW_DATA_ID])
add(RawExpression('static const uint8_t {}[{}] PROGMEM = {}'.format(
raw_data, len(data),
ArrayInitializer(*[HexInt(x) for x in data], multiline=False))))
rhs = App.make_image(raw_data, width, height)
Pvariable(conf[CONF_ID], rhs)