[lvgl] Implement canvas widget (#8504)

esphome/components/lvgl/__init__.py

@@ -39,14 +39,13 @@ from .lvcode import LvContext, LvglComponent, lvgl_static
 from .schemas import (
     DISP_BG_SCHEMA,
     FLEX_OBJ_SCHEMA,
+    FULL_STYLE_SCHEMA,
     GRID_CELL_SCHEMA,
     LAYOUT_SCHEMAS,
-    STYLE_SCHEMA,
     WIDGET_TYPES,
     any_widget_schema,
     container_schema,
     create_modify_schema,
-    grid_alignments,
     obj_schema,
 )
 from .styles import add_top_layer, styles_to_code, theme_to_code
@@ -74,6 +73,7 @@ from .widgets.animimg import animimg_spec
 from .widgets.arc import arc_spec
 from .widgets.button import button_spec
 from .widgets.buttonmatrix import buttonmatrix_spec
+from .widgets.canvas import canvas_spec
 from .widgets.checkbox import checkbox_spec
 from .widgets.dropdown import dropdown_spec
 from .widgets.img import img_spec
@@ -126,6 +126,7 @@ for w_type in (
     keyboard_spec,
     tileview_spec,
     qr_code_spec,
+    canvas_spec,
 ):
     WIDGET_TYPES[w_type.name] = w_type
 
@@ -421,15 +422,8 @@ LVGL_SCHEMA = cv.All(
                     "big_endian", "little_endian"
                 ),
                 cv.Optional(df.CONF_STYLE_DEFINITIONS): cv.ensure_list(
-                    cv.Schema({cv.Required(CONF_ID): cv.declare_id(lv_style_t)})
-                    .extend(STYLE_SCHEMA)
-                    .extend(
-                        {
-                            cv.Optional(df.CONF_GRID_CELL_X_ALIGN): grid_alignments,
-                            cv.Optional(df.CONF_GRID_CELL_Y_ALIGN): grid_alignments,
-                            cv.Optional(df.CONF_PAD_ROW): lvalid.pixels,
-                            cv.Optional(df.CONF_PAD_COLUMN): lvalid.pixels,
-                        }
+                    cv.Schema({cv.Required(CONF_ID): cv.declare_id(lv_style_t)}).extend(
+                        FULL_STYLE_SCHEMA
                     )
                 ),
                 cv.Optional(CONF_ON_IDLE): validate_automation(

esphome/components/lvgl/defines.py

@@ -29,7 +29,7 @@ def add_define(macro, value="1"):
     lv_defines[macro] = value
 
 
-def literal(arg):
+def literal(arg) -> MockObj:
     if isinstance(arg, str):
         return MockObj(arg)
     return arg

esphome/components/lvgl/lv_validation.py

@@ -254,11 +254,27 @@ def pixels_or_percent_validator(value):
 pixels_or_percent = LValidator(pixels_or_percent_validator, uint32, retmapper=literal)
 
 
-def zoom(value):
+def pixels_validator(value):
+    if isinstance(value, str) and value.lower().endswith("px"):
+        value = value[:-2]
+    return cv.positive_int(value)
+
+
+pixels = LValidator(pixels_validator, uint32, retmapper=literal)
+
+
+def zoom_validator(value):
     value = cv.float_range(0.1, 10.0)(value)
+    return value
+
+
+def zoom_retmapper(value):
     return int(value * 256)
 
 
+zoom = LValidator(zoom_validator, uint32, retmapper=zoom_retmapper)
+
+
 def angle(value):
     """
     Validation for an angle in degrees, converted to an integer representing 0.1deg units
@@ -286,14 +302,6 @@ def size_validator(value):
 size = LValidator(size_validator, uint32, retmapper=literal)
 
 
-def pixels_validator(value):
-    if isinstance(value, str) and value.lower().endswith("px"):
-        return cv.int_(value[:-2])
-    return cv.int_(value)
-
-
-pixels = LValidator(pixels_validator, uint32, retmapper=literal)
-
 radius_consts = LvConstant("LV_RADIUS_", "CIRCLE")
 
 

esphome/components/lvgl/lvcode.py

@@ -206,11 +206,16 @@ class LocalVariable(MockObj):
 
     def __enter__(self):
         CodeContext.start_block()
-        CodeContext.append(
-            VariableDeclarationExpression(self.base.type, self.modifier, self.base.id)
-        )
         if self.rhs is not None:
-            CodeContext.append(AssignmentExpression(None, "", self.base, self.rhs))
+            CodeContext.append(
+                AssignmentExpression(self.base.type, self.modifier, self.base, self.rhs)
+            )
+        else:
+            CodeContext.append(
+                VariableDeclarationExpression(
+                    self.base.type, self.modifier, self.base.id
+                )
+            )
         return MockObj(self.base)
 
     def __exit__(self, *args):

esphome/components/lvgl/lvgl_esphome.h

@@ -63,6 +63,11 @@ inline void lv_disp_set_bg_image(lv_disp_t *disp, esphome::image::Image *image)
 inline void lv_obj_set_style_bg_img_src(lv_obj_t *obj, esphome::image::Image *image, lv_style_selector_t selector) {
   lv_obj_set_style_bg_img_src(obj, image->get_lv_img_dsc(), selector);
 }
+inline void lv_canvas_draw_img(lv_obj_t *canvas, lv_coord_t x, lv_coord_t y, image::Image *image,
+                               lv_draw_img_dsc_t *dsc) {
+  lv_canvas_draw_img(canvas, x, y, image->get_lv_img_dsc(), dsc);
+}
+
 #ifdef USE_LVGL_METER
 inline lv_meter_indicator_t *lv_meter_add_needle_img(lv_obj_t *obj, lv_meter_scale_t *scale, esphome::image::Image *src,
                                                      lv_coord_t pivot_x, lv_coord_t pivot_y) {

esphome/components/lvgl/schemas.py

@@ -87,31 +87,29 @@ ENCODER_SCHEMA = cv.Schema(
     }
 )
 
+POINT_SCHEMA = cv.Schema(
+    {
+        cv.Required(CONF_X): cv.templatable(cv.int_),
+        cv.Required(CONF_Y): cv.templatable(cv.int_),
+    }
+)
 
-def point_shorthand(value):
+
+def point_schema(value):
     """
     A shorthand for a point in the form of x,y
     :param value: The value to check
     :return: The value as a tuple of x,y
     """
-    if isinstance(value, str):
+    if isinstance(value, dict):
+        return POINT_SCHEMA(value)
     try:
         x, y = map(int, value.split(","))
         return {CONF_X: x, CONF_Y: y}
     except ValueError:
         pass
-    raise cv.Invalid("Invalid point format, should be <x_value>, <y_value>")
-
-
-POINT_SCHEMA = cv.Any(
-    cv.Schema(
-        {
-            cv.Required(CONF_X): cv.templatable(cv.int_),
-            cv.Required(CONF_Y): cv.templatable(cv.int_),
-        }
-    ),
-    point_shorthand,
-)
+    # not raising this in the catch block because pylint doesn't like it
+    raise cv.Invalid("Invalid point format, should be <x_int>, <y_int>")
 
 
 # All LVGL styles and their validators
@@ -132,6 +130,7 @@ STYLE_PROPS = {
     "bg_image_recolor": lvalid.lv_color,
     "bg_image_recolor_opa": lvalid.opacity,
     "bg_image_src": lvalid.lv_image,
+    "bg_image_tiled": lvalid.lv_bool,
     "bg_main_stop": lvalid.stop_value,
     "bg_opa": lvalid.opacity,
     "border_color": lvalid.lv_color,
@@ -146,9 +145,9 @@ STYLE_PROPS = {
     "height": lvalid.size,
     "image_recolor": lvalid.lv_color,
     "image_recolor_opa": lvalid.opacity,
-    "line_width": cv.positive_int,
-    "line_dash_width": cv.positive_int,
-    "line_dash_gap": cv.positive_int,
+    "line_width": lvalid.lv_positive_int,
+    "line_dash_width": lvalid.lv_positive_int,
+    "line_dash_gap": lvalid.lv_positive_int,
     "line_rounded": lvalid.lv_bool,
     "line_color": lvalid.lv_color,
     "opa": lvalid.opacity,
@@ -176,8 +175,8 @@ STYLE_PROPS = {
         "LV_TEXT_DECOR_", "NONE", "UNDERLINE", "STRIKETHROUGH"
     ).several_of,
     "text_font": lv_font,
-    "text_letter_space": cv.positive_int,
-    "text_line_space": cv.positive_int,
+    "text_letter_space": lvalid.lv_positive_int,
+    "text_line_space": lvalid.lv_positive_int,
     "text_opa": lvalid.opacity,
     "transform_angle": lvalid.lv_angle,
     "transform_height": lvalid.pixels_or_percent,
@@ -201,10 +200,15 @@ STYLE_REMAP = {
     "bg_image_recolor": "bg_img_recolor",
     "bg_image_recolor_opa": "bg_img_recolor_opa",
     "bg_image_src": "bg_img_src",
+    "bg_image_tiled": "bg_img_tiled",
     "image_recolor": "img_recolor",
     "image_recolor_opa": "img_recolor_opa",
 }
 
+cell_alignments = df.LV_CELL_ALIGNMENTS.one_of
+grid_alignments = df.LV_GRID_ALIGNMENTS.one_of
+flex_alignments = df.LV_FLEX_ALIGNMENTS.one_of
+
 # Complete object style schema
 STYLE_SCHEMA = cv.Schema({cv.Optional(k): v for k, v in STYLE_PROPS.items()}).extend(
     {
@@ -215,6 +219,16 @@ STYLE_SCHEMA = cv.Schema({cv.Optional(k): v for k, v in STYLE_PROPS.items()}).ex
     }
 )
 
+# Also allow widget specific properties for use in style definitions
+FULL_STYLE_SCHEMA = STYLE_SCHEMA.extend(
+    {
+        cv.Optional(df.CONF_GRID_CELL_X_ALIGN): grid_alignments,
+        cv.Optional(df.CONF_GRID_CELL_Y_ALIGN): grid_alignments,
+        cv.Optional(df.CONF_PAD_ROW): lvalid.pixels,
+        cv.Optional(df.CONF_PAD_COLUMN): lvalid.pixels,
+    }
+)
+
 # Object states. Top level properties apply to MAIN
 STATE_SCHEMA = cv.Schema(
     {cv.Optional(state): STYLE_SCHEMA for state in df.STATES}
@@ -346,10 +360,6 @@ grid_spec = cv.Any(
     lvalid.size, df.LvConstant("LV_GRID_", "CONTENT").one_of, grid_free_space
 )
 
-cell_alignments = df.LV_CELL_ALIGNMENTS.one_of
-grid_alignments = df.LV_GRID_ALIGNMENTS.one_of
-flex_alignments = df.LV_FLEX_ALIGNMENTS.one_of
-
 LAYOUT_SCHEMA = {
     cv.Optional(df.CONF_LAYOUT): cv.typed_schema(
         {

esphome/components/lvgl/styles.py

@@ -1,4 +1,6 @@
+from esphome import automation
 import esphome.codegen as cg
+import esphome.config_validation as cv
 from esphome.const import CONF_ID
 from esphome.core import ID
 from esphome.cpp_generator import MockObj
@@ -12,17 +14,19 @@ from .defines import (
 )
 from .helpers import add_lv_use
 from .lvcode import LambdaContext, LocalVariable, lv, lv_assign, lv_variable
-from .schemas import ALL_STYLES, STYLE_REMAP
-from .types import lv_lambda_t, lv_obj_t, lv_obj_t_ptr
-from .widgets import Widget, add_widgets, set_obj_properties, theme_widget_map
+from .schemas import ALL_STYLES, FULL_STYLE_SCHEMA, STYLE_REMAP
+from .types import ObjUpdateAction, lv_lambda_t, lv_obj_t, lv_obj_t_ptr, lv_style_t
+from .widgets import (
+    Widget,
+    add_widgets,
+    set_obj_properties,
+    theme_widget_map,
+    wait_for_widgets,
+)
 from .widgets.obj import obj_spec
 
 
-async def styles_to_code(config):
-    """Convert styles to C__ code."""
-    for style in config.get(CONF_STYLE_DEFINITIONS, ()):
-        svar = cg.new_Pvariable(style[CONF_ID])
-        lv.style_init(svar)
+async def style_set(svar, style):
     for prop, validator in ALL_STYLES.items():
         if (value := style.get(prop)) is not None:
             if isinstance(validator, LValidator):
@@ -33,6 +37,33 @@ async def styles_to_code(config):
             lv.call(f"style_set_{remapped_prop}", svar, literal(value))
 
 
+async def styles_to_code(config):
+    """Convert styles to C__ code."""
+    for style in config.get(CONF_STYLE_DEFINITIONS, ()):
+        svar = cg.new_Pvariable(style[CONF_ID])
+        lv.style_init(svar)
+        await style_set(svar, style)
+
+
+@automation.register_action(
+    "lvgl.style.update",
+    ObjUpdateAction,
+    FULL_STYLE_SCHEMA.extend(
+        {
+            cv.Required(CONF_ID): cv.use_id(lv_style_t),
+        }
+    ),
+)
+async def style_update_to_code(config, action_id, template_arg, args):
+    await wait_for_widgets()
+    style = await cg.get_variable(config[CONF_ID])
+    async with LambdaContext(parameters=args, where=action_id) as context:
+        await style_set(style, config)
+
+    var = cg.new_Pvariable(action_id, template_arg, await context.get_lambda())
+    return var
+
+
 async def theme_to_code(config):
     if theme := config.get(CONF_THEME):
         add_lv_use(CONF_THEME)

esphome/components/lvgl/widgets/canvas.py

@@ -0,0 +1,403 @@
+from esphome import automation, codegen as cg, config_validation as cv
+from esphome.components.display_menu_base import CONF_LABEL
+from esphome.const import CONF_COLOR, CONF_HEIGHT, CONF_ID, CONF_TEXT, CONF_WIDTH
+from esphome.cpp_generator import Literal, MockObj
+
+from ..automation import action_to_code
+from ..defines import (
+    CONF_END_ANGLE,
+    CONF_MAIN,
+    CONF_OPA,
+    CONF_PIVOT_X,
+    CONF_PIVOT_Y,
+    CONF_POINTS,
+    CONF_SRC,
+    CONF_START_ANGLE,
+    CONF_X,
+    CONF_Y,
+    literal,
+)
+from ..lv_validation import (
+    lv_angle,
+    lv_bool,
+    lv_color,
+    lv_image,
+    lv_text,
+    opacity,
+    pixels,
+    size,
+)
+from ..lvcode import LocalVariable, lv, lv_assign
+from ..schemas import STYLE_PROPS, STYLE_REMAP, TEXT_SCHEMA, point_schema
+from ..types import LvType, ObjUpdateAction, WidgetType
+from . import Widget, get_widgets
+from .line import lv_point_t, process_coord
+
+CONF_CANVAS = "canvas"
+CONF_BUFFER_ID = "buffer_id"
+CONF_MAX_WIDTH = "max_width"
+CONF_TRANSPARENT = "transparent"
+CONF_RADIUS = "radius"
+
+lv_canvas_t = LvType("lv_canvas_t")
+
+
+class CanvasType(WidgetType):
+    def __init__(self):
+        super().__init__(
+            CONF_CANVAS,
+            lv_canvas_t,
+            (CONF_MAIN,),
+            cv.Schema(
+                {
+                    cv.Required(CONF_WIDTH): size,
+                    cv.Required(CONF_HEIGHT): size,
+                    cv.Optional(CONF_TRANSPARENT, default=False): cv.boolean,
+                }
+            ),
+        )
+
+    def get_uses(self):
+        return "img", CONF_LABEL
+
+    async def to_code(self, w: Widget, config):
+        width = config[CONF_WIDTH]
+        height = config[CONF_HEIGHT]
+        use_alpha = "_ALPHA" if config[CONF_TRANSPARENT] else ""
+        lv.canvas_set_buffer(
+            w.obj,
+            lv.custom_mem_alloc(
+                literal(f"LV_CANVAS_BUF_SIZE_TRUE_COLOR{use_alpha}({width}, {height})")
+            ),
+            width,
+            height,
+            literal(f"LV_IMG_CF_TRUE_COLOR{use_alpha}"),
+        )
+
+
+canvas_spec = CanvasType()
+
+
+@automation.register_action(
+    "lvgl.canvas.fill",
+    ObjUpdateAction,
+    cv.Schema(
+        {
+            cv.GenerateID(CONF_ID): cv.use_id(lv_canvas_t),
+            cv.Required(CONF_COLOR): lv_color,
+            cv.Optional(CONF_OPA, default="COVER"): opacity,
+        },
+    ),
+)
+async def canvas_fill(config, action_id, template_arg, args):
+    widget = await get_widgets(config)
+    color = await lv_color.process(config[CONF_COLOR])
+    opa = await opacity.process(config[CONF_OPA])
+
+    async def do_fill(w: Widget):
+        lv.canvas_fill_bg(w.obj, color, opa)
+
+    return await action_to_code(widget, do_fill, action_id, template_arg, args)
+
+
+@automation.register_action(
+    "lvgl.canvas.set_pixels",
+    ObjUpdateAction,
+    cv.Schema(
+        {
+            cv.GenerateID(CONF_ID): cv.use_id(lv_canvas_t),
+            cv.Required(CONF_COLOR): lv_color,
+            cv.Optional(CONF_OPA): opacity,
+            cv.Required(CONF_POINTS): cv.ensure_list(point_schema),
+        },
+    ),
+)
+async def canvas_set_pixel(config, action_id, template_arg, args):
+    widget = await get_widgets(config)
+    color = await lv_color.process(config[CONF_COLOR])
+    opa = await opacity.process(config.get(CONF_OPA))
+    points = [
+        (
+            await pixels.process(p[CONF_X]),
+            await pixels.process(p[CONF_Y]),
+        )
+        for p in config[CONF_POINTS]
+    ]
+
+    async def do_set_pixels(w: Widget):
+        if isinstance(color, MockObj):
+            for point in points:
+                x, y = point
+                lv.canvas_set_px_color(w.obj, x, y, color)
+        else:
+            with LocalVariable("color", "lv_color_t", color, modifier="") as color_var:
+                for point in points:
+                    x, y = point
+                    lv.canvas_set_px_color(w.obj, x, y, color_var)
+        if opa:
+            if isinstance(opa, Literal):
+                for point in points:
+                    x, y = point
+                    lv.canvas_set_px_opa(w.obj, x, y, opa)
+            else:
+                with LocalVariable("opa", "lv_opa_t", opa, modifier="") as opa_var:
+                    for point in points:
+                        x, y = point
+                        lv.canvas_set_px_opa(w.obj, x, y, opa_var)
+
+    return await action_to_code(widget, do_set_pixels, action_id, template_arg, args)
+
+
+DRAW_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(CONF_ID): cv.use_id(lv_canvas_t),
+        cv.Required(CONF_X): pixels,
+        cv.Required(CONF_Y): pixels,
+    }
+)
+DRAW_OPA_SCHEMA = DRAW_SCHEMA.extend(
+    {
+        cv.Optional(CONF_OPA): opacity,
+    }
+)
+
+
+async def draw_to_code(config, dsc_type, props, do_draw, action_id, template_arg, args):
+    widget = await get_widgets(config)
+    x = await pixels.process(config.get(CONF_X))
+    y = await pixels.process(config.get(CONF_Y))
+
+    async def action_func(w: Widget):
+        with LocalVariable("dsc", f"lv_draw_{dsc_type}_dsc_t", modifier="") as dsc:
+            dsc_addr = literal(f"&{dsc}")
+            lv.call(f"draw_{dsc_type}_dsc_init", dsc_addr)
+            if CONF_OPA in config:
+                opa = await opacity.process(config[CONF_OPA])
+                lv_assign(dsc.opa, opa)
+            for prop, validator in props.items():
+                if prop in config:
+                    value = await validator.process(config[prop])
+                    mapped_prop = STYLE_REMAP.get(prop, prop)
+                    lv_assign(getattr(dsc, mapped_prop), value)
+            await do_draw(w, x, y, dsc_addr)
+
+    return await action_to_code(widget, action_func, action_id, template_arg, args)
+
+
+RECT_PROPS = {
+    p: STYLE_PROPS[p]
+    for p in (
+        "radius",
+        "bg_opa",
+        "bg_color",
+        "bg_grad",
+        "border_color",
+        "border_width",
+        "border_opa",
+        "outline_color",
+        "outline_width",
+        "outline_pad",
+        "outline_opa",
+        "shadow_color",
+        "shadow_width",
+        "shadow_ofs_x",
+        "shadow_ofs_y",
+        "shadow_spread",
+        "shadow_opa",
+    )
+}
+
+
+@automation.register_action(
+    "lvgl.canvas.draw_rectangle",
+    ObjUpdateAction,
+    DRAW_SCHEMA.extend(
+        {
+            cv.Required(CONF_WIDTH): cv.templatable(cv.int_),
+            cv.Required(CONF_HEIGHT): cv.templatable(cv.int_),
+        },
+    ).extend({cv.Optional(prop): STYLE_PROPS[prop] for prop in RECT_PROPS}),
+)
+async def canvas_draw_rect(config, action_id, template_arg, args):
+    width = await pixels.process(config[CONF_WIDTH])
+    height = await pixels.process(config[CONF_HEIGHT])
+
+    async def do_draw_rect(w: Widget, x, y, dsc_addr):
+        lv.canvas_draw_rect(w.obj, x, y, width, height, dsc_addr)
+
+    return await draw_to_code(
+        config, "rect", RECT_PROPS, do_draw_rect, action_id, template_arg, args
+    )
+
+
+TEXT_PROPS = {
+    p: STYLE_PROPS[f"text_{p}"]
+    for p in (
+        "font",
+        "color",
+        # "sel_color",
+        # "sel_bg_color",
+        "line_space",
+        "letter_space",
+        "align",
+        "decor",
+    )
+}
+
+
+@automation.register_action(
+    "lvgl.canvas.draw_text",
+    ObjUpdateAction,
+    TEXT_SCHEMA.extend(DRAW_OPA_SCHEMA)
+    .extend(
+        {
+            cv.Required(CONF_MAX_WIDTH): cv.templatable(cv.int_),
+        },
+    )
+    .extend({cv.Optional(prop): STYLE_PROPS[f"text_{prop}"] for prop in TEXT_PROPS}),
+)
+async def canvas_draw_text(config, action_id, template_arg, args):
+    text = await lv_text.process(config[CONF_TEXT])
+    max_width = await pixels.process(config[CONF_MAX_WIDTH])
+
+    async def do_draw_text(w: Widget, x, y, dsc_addr):
+        lv.canvas_draw_text(w.obj, x, y, max_width, dsc_addr, text)
+
+    return await draw_to_code(
+        config, "label", TEXT_PROPS, do_draw_text, action_id, template_arg, args
+    )
+
+
+IMG_PROPS = {
+    "angle": STYLE_PROPS["transform_angle"],
+    "zoom": STYLE_PROPS["transform_zoom"],
+    "recolor": STYLE_PROPS["image_recolor"],
+    "recolor_opa": STYLE_PROPS["image_recolor_opa"],
+    "opa": STYLE_PROPS["opa"],
+}
+
+
+@automation.register_action(
+    "lvgl.canvas.draw_image",
+    ObjUpdateAction,
+    DRAW_OPA_SCHEMA.extend(
+        {
+            cv.Required(CONF_SRC): lv_image,
+            cv.Optional(CONF_PIVOT_X, default=0): pixels,
+            cv.Optional(CONF_PIVOT_Y, default=0): pixels,
+        },
+    ).extend({cv.Optional(prop): validator for prop, validator in IMG_PROPS.items()}),
+)
+async def canvas_draw_image(config, action_id, template_arg, args):
+    src = await lv_image.process(config[CONF_SRC])
+    pivot_x = await pixels.process(config[CONF_PIVOT_X])
+    pivot_y = await pixels.process(config[CONF_PIVOT_Y])
+
+    async def do_draw_image(w: Widget, x, y, dsc_addr):
+        dsc = MockObj(f"(*{dsc_addr})")
+        if pivot_x or pivot_y:
+            # pylint :disable=no-member
+            lv_assign(dsc.pivot, literal(f"{{{pivot_x}, {pivot_y}}}"))
+        lv.canvas_draw_img(w.obj, x, y, src, dsc_addr)
+
+    return await draw_to_code(
+        config, "img", IMG_PROPS, do_draw_image, action_id, template_arg, args
+    )
+
+
+LINE_PROPS = {
+    "width": STYLE_PROPS["line_width"],
+    "color": STYLE_PROPS["line_color"],
+    "dash-width": STYLE_PROPS["line_dash_width"],
+    "dash-gap": STYLE_PROPS["line_dash_gap"],
+    "round_start": lv_bool,
+    "round_end": lv_bool,
+}
+
+
+@automation.register_action(
+    "lvgl.canvas.draw_line",
+    ObjUpdateAction,
+    cv.Schema(
+        {
+            cv.GenerateID(CONF_ID): cv.use_id(lv_canvas_t),
+            cv.Optional(CONF_OPA): opacity,
+            cv.Required(CONF_POINTS): cv.ensure_list(point_schema),
+        },
+    ).extend({cv.Optional(prop): validator for prop, validator in LINE_PROPS.items()}),
+)
+async def canvas_draw_line(config, action_id, template_arg, args):
+    points = [
+        [await process_coord(p[CONF_X]), await process_coord(p[CONF_Y])]
+        for p in config[CONF_POINTS]
+    ]
+
+    async def do_draw_line(w: Widget, x, y, dsc_addr):
+        with LocalVariable(
+            "points", cg.std_vector.template(lv_point_t), points, modifier=""
+        ) as points_var:
+            lv.canvas_draw_line(w.obj, points_var.data(), points_var.size(), dsc_addr)
+
+    return await draw_to_code(
+        config, "line", LINE_PROPS, do_draw_line, action_id, template_arg, args
+    )
+
+
+@automation.register_action(
+    "lvgl.canvas.draw_polygon",
+    ObjUpdateAction,
+    cv.Schema(
+        {
+            cv.GenerateID(CONF_ID): cv.use_id(lv_canvas_t),
+            cv.Required(CONF_POINTS): cv.ensure_list(point_schema),
+        },
+    ).extend({cv.Optional(prop): STYLE_PROPS[prop] for prop in RECT_PROPS}),
+)
+async def canvas_draw_polygon(config, action_id, template_arg, args):
+    points = [
+        [await process_coord(p[CONF_X]), await process_coord(p[CONF_Y])]
+        for p in config[CONF_POINTS]
+    ]
+
+    async def do_draw_polygon(w: Widget, x, y, dsc_addr):
+        with LocalVariable(
+            "points", cg.std_vector.template(lv_point_t), points, modifier=""
+        ) as points_var:
+            lv.canvas_draw_polygon(
+                w.obj, points_var.data(), points_var.size(), dsc_addr
+            )
+
+    return await draw_to_code(
+        config, "rect", RECT_PROPS, do_draw_polygon, action_id, template_arg, args
+    )
+
+
+ARC_PROPS = {
+    "width": STYLE_PROPS["arc_width"],
+    "color": STYLE_PROPS["arc_color"],
+    "rounded": STYLE_PROPS["arc_rounded"],
+}
+
+
+@automation.register_action(
+    "lvgl.canvas.draw_arc",
+    ObjUpdateAction,
+    DRAW_OPA_SCHEMA.extend(
+        {
+            cv.Required(CONF_RADIUS): pixels,
+            cv.Required(CONF_START_ANGLE): lv_angle,
+            cv.Required(CONF_END_ANGLE): lv_angle,
+        }
+    ).extend({cv.Optional(prop): validator for prop, validator in ARC_PROPS.items()}),
+)
+async def canvas_draw_arc(config, action_id, template_arg, args):
+    radius = await size.process(config[CONF_RADIUS])
+    start_angle = await lv_angle.process(config[CONF_START_ANGLE])
+    end_angle = await lv_angle.process(config[CONF_END_ANGLE])
+
+    async def do_draw_arc(w: Widget, x, y, dsc_addr):
+        lv.canvas_draw_arc(w.obj, x, y, radius, start_angle, end_angle, dsc_addr)
+
+    return await draw_to_code(
+        config, "arc", ARC_PROPS, do_draw_arc, action_id, template_arg, args
+    )

esphome/components/lvgl/widgets/line.py

@@ -4,7 +4,7 @@ from esphome.core import Lambda
 
 from ..defines import CONF_MAIN, CONF_X, CONF_Y, call_lambda
 from ..lvcode import lv_add
-from ..schemas import POINT_SCHEMA
+from ..schemas import point_schema
 from ..types import LvCompound, LvType
 from . import Widget, WidgetType
 
@@ -16,14 +16,14 @@ lv_point_t = cg.global_ns.struct("lv_point_t")
 
 
 LINE_SCHEMA = {
-    cv.Required(CONF_POINTS): cv.ensure_list(POINT_SCHEMA),
+    cv.Required(CONF_POINTS): cv.ensure_list(point_schema),
 }
 
 
 async def process_coord(coord):
     if isinstance(coord, Lambda):
         coord = call_lambda(
-            await cg.process_lambda(coord, (), return_type="lv_coord_t")
+            await cg.process_lambda(coord, [], return_type="lv_coord_t")
         )
         if not coord.endswith("()"):
             coord = f"static_cast<lv_coord_t>({coord})"

tests/components/lvgl/lvgl-package.yaml

@@ -130,6 +130,10 @@ lvgl:
           on_click:
             then:
               - lvgl.widget.hide: message_box
+              - lvgl.style.update:
+                  id: style_test
+                  bg_color: blue
+                  bg_opa: !lambda return 0.5;
     - id: simple_msgbox
       title: Simple
 
@@ -510,6 +514,110 @@ lvgl:
 
     - id: page2
       widgets:
+        - canvas:
+            id: canvas_id
+            align: center
+            width: 400
+            height: 400
+            transparent: true
+            on_boot:
+              - lvgl.canvas.fill:
+                  color: blue
+                  opa: 50%
+              - lvgl.canvas.draw_rectangle:
+                  x: 20
+                  y: 20
+                  width: 150
+                  height: 150
+                  bg_color: green
+                  bg_opa: cover
+                  radius: 5
+                  border_color: black
+                  border_width: 4
+                  border_opa: 80%
+                  shadow_color: black
+                  shadow_width: 10
+                  shadow_ofs_x: 5
+                  shadow_ofs_y: 5
+                  shadow_spread: 4
+                  shadow_opa: cover
+                  outline_color: red
+                  outline_width: 4
+                  outline_pad: 4
+                  outline_opa: cover
+              - lvgl.canvas.set_pixels:
+                  color: red
+                  points:
+                    - x: 100
+                      y: 100
+                    - 100,101
+                    - 100,102
+                    - 100,103
+                    - 100,104
+              - lvgl.canvas.set_pixels:
+                  opa: 50%
+                  color: !lambda return lv_color_make(255,255,255);
+                  points:
+                    - x: !lambda return random_uint32() % 200;
+                      y: !lambda return random_uint32() % 200;
+                    - 121,120
+                    - 122,120
+                    - 123,120
+                    - 124,120
+                    - 125,120
+
+              - lvgl.canvas.draw_text:
+                  x: 100
+                  y: 100
+                  font: montserrat_18
+                  color: white
+                  opa: cover
+                  decor: underline
+                  letter_space: 1
+                  line_space: 2
+                  text: Canvas Text
+                  align: center
+                  max_width: 150
+              - lvgl.canvas.draw_image:
+                  src: cat_image
+                  x: 100
+                  y: 100
+                  angle: 90
+                  zoom: 2.0
+                  pivot_x: 25
+                  pivot_y: 25
+              - lvgl.canvas.draw_line:
+                  color: blue
+                  width: 4
+                  round_end: true
+                  round_start: false
+                  points:
+                    - 50,50
+                    - 50, 200
+                    - 200, 200
+                    - 200, 50
+                    - 50,50
+              - lvgl.canvas.draw_polygon:
+                  bg_color: teal
+                  border_color: white
+                  border_width: 2
+                  border_opa: cover
+                  points:
+                    - 150,150
+                    - 150, 300
+                    - 300, 300
+                    - 350, 250
+              - lvgl.canvas.draw_arc:
+                  x: 200
+                  y: 200
+                  radius: 40
+                  opa: 50%
+                  color: purple
+                  width: 6
+                  rounded: true
+                  start_angle: 10
+                  end_angle: !lambda return 900;
+
         - qrcode:
             id: lv_qr
             align: left_mid