Displays

esphomeyaml/components/image.py

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+# 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(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(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')
+        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)