Texture Management

arcade.Texture

class arcade.Texture(image: Image | ImageData, *, hit_box_algorithm: HitBoxAlgorithm | None = None, hit_box_points: Sequence[Tuple[float, float]] | None = None, hash: str | None = None, **kwargs)

An arcade.Texture is simply a wrapper for image data as a Pillow image and the hit box data for this image used in collision detection. Usually created by the load_texture or load_textures commands.

Parameters:

• image (PIL.Image.Image) – The image or ImageData for this texture

• hit_box_algorithm (str) – The algorithm to use for calculating the hit box.

• hit_box_points (HitBox) – A list of hitbox points for the texture to use (Optional). Completely overrides the hit box algorithm.

• hash (str) – Optional unique name for the texture. Can be used to make this texture globally unique. By default the hash of the pixel data is used.

add_atlas_ref(atlas: TextureAtlas) → None

Add a reference to an atlas that this texture is in.

property atlas_name: str

The name of the texture used for the texture atlas (read only).

Returns:

str

property cache_name: str

The name of the texture used for caching (read only).

Returns:

str

classmethod create_cache_name(*, hash: str, hit_box_algorithm: HitBoxAlgorithm, vertex_order: Tuple[int, int, int, int] = (0, 1, 2, 3)) → str

Create a cache name for the texture.

Parameters:

• image_data (ImageData) – The image data

• hit_box_algorithm – The hit box algorithm

• hit_box_args (dict) – The hit box algorithm arguments

• vertex_order (Tuple[int, int, int, int]) – The vertex order

Returns:

str

classmethod create_empty(name: str, size: Tuple[int, int], color: Tuple[int, int, int, int] = Color(r=0, g=0, b=0, a=0)) → Texture

Create a texture with all pixels set to transparent black.

The hit box of the returned Texture will be set to a rectangle with the dimensions in size because there is no non-blank pixel data to calculate a hit box.

Parameters:

• name (str) – The unique name for this texture

• size (Tuple[int,int]) – The xy size of the internal image

This function has multiple uses, including:

• Allocating space in texture atlases

• Generating custom cached textures from component images

The internal image can be altered with Pillow draw commands and then written/updated to a texture atlas. This works best for infrequent changes such as generating custom cached sprites. For frequent texture changes, you should instead render directly into the texture atlas.

Warning

If you plan to alter images using Pillow, read its documentation thoroughly! Some of the functions can have unexpected behavior.

For example, if you want to draw one or more images that contain transparency onto a base image that also contains transparency, you will likely need to use PIL.Image.alpha_composite as part of your solution. Otherwise, blending may behave in unexpected ways.

This is especially important for customizable characters.

Be careful of your RAM usage when using this function. The Texture this method returns will have a new internal RGBA Pillow image which uses 4 bytes for every pixel in it. This will quickly add up if you create many large Textures.

If you want to create more than one blank texture with the same dimensions, you can save CPU time and RAM by calling this function once, then passing the image attribute of the resulting Texture object to the class constructor for each additional blank Texture instance you would like to create. This can be especially helpful if you are creating multiple large Textures.

classmethod create_filled(name: str, size: Tuple[int, int], color: Tuple[int, int, int, int]) → Texture

Create a filled texture. This is an alias for create_empty().

Parameters:

• name (str) – Name of the texture

• size (Tuple[int, int]) – Size of the texture

• color (RGBA255) – Color of the texture

Returns:

Texture

crop(x: int, y: int, width: int, height: int) → Texture

Create a new texture from a sub-section of this texture.

If the crop is the same size as the original texture or the crop is 0 width or height, the original texture is returned.

Parameters:

• x (int) – X position to start crop

• y (int) – Y position to start crop

• width (int) – Width of crop

• height (int) – Height of crop

• cache (bool) – If True, the cropped texture will be cached

Returns:

Texture

property crop_values: Tuple[int, int, int, int] | None

The crop values used to create this texture in the referenced file

Returns:

Tuple[int, int, int, int]

draw_scaled(center_x: float, center_y: float, scale: float = 1.0, angle: float = 0.0, alpha: int = 255)

Draw the texture.

Warning

This is a very slow method of drawing a texture, and should be used sparingly. The method simply creates a sprite internally and draws it.

Parameters:

• center_x (float) – X location of where to draw the texture.

• center_y (float) – Y location of where to draw the texture.

• scale (float) – Scale to draw rectangle. Defaults to 1.

• angle (float) – Angle to rotate the texture by.

• alpha (int) – The transparency of the texture (0-255).

draw_sized(center_x: float, center_y: float, width: float, height: float, angle: float = 0.0, alpha: int = 255)

Draw a texture with a specific width and height.

Warning

This is a very slow method of drawing a texture, and should be used sparingly. The method simply creates a sprite internally and draws it.

Parameters:

• center_x (float) – X position to draw texture

• center_y (float) – Y position to draw texture

• width (float) – Width to draw texture

• height (float) – Height to draw texture

• angle (float) – Angle to draw texture

• alpha (int) – Alpha value to draw texture

property file_path: Path | None

A Path object to the file this texture was loaded from

Returns:

Path

flip_diagonally() → Texture

Returns a new texture that is flipped diagonally from this texture. This is an alias for transpose().

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

flip_horizontally() → Texture

Flip the texture left to right / horizontally.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

flip_left_right() → Texture

Flip the texture left to right / horizontally.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

flip_top_bottom() → Texture

Flip the texture top to bottom / vertically.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

flip_vertically() → Texture

Flip the texture top to bottom / vertically.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

property height: int

The virtual width of the texture in pixels.

This can be different from the actual width if the texture has been transformed or the size have been set manually.

Return type:

int

property hit_box_algorithm: HitBoxAlgorithm

(read only) The algorithm used to calculate the hit box for this texture.

property hit_box_points: Sequence[Tuple[float, float]]

Get the hit box points for this texture.

Custom hit box points must be supplied during texture creation and should ideally not be changed after creation.

Returns:

PointList

property image: Image

Get or set the image of the texture.

Warning

This is an advanced function. Be absolutely sure you know the consequences of changing the image. It can cause problems with the texture atlas and hit box points.

Parameters:

image (PIL.Image.Image) – The image to set

property image_data: ImageData

The image data of the texture (read only).

This is a simple wrapper around the image containing metadata like hash and is used to determine the uniqueness of the image in texture atlases.

Returns:

ImageData

property properties: Dict[str, Any]

A dictionary of properties for this texture. This can be used to store any data you want.

Returns:

Dict[str, Any]

remove_atlas_ref(atlas: TextureAtlas) → None

Remove a reference to an atlas that this texture is in.

remove_from_atlases() → None

Remove this texture from all atlases.

remove_from_cache(ignore_error: bool = True) → None

Remove this texture from the cache.

Parameters:

ignore_error (bool) – If True, ignore errors if the texture is not in the cache

Returns:

None

rotate_180() → Texture

Rotate the texture 180 degrees.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

rotate_270() → Texture

Rotate the texture 270 degrees.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

rotate_90(count: int = 1) → Texture

Rotate the texture by a given number of 90 degree steps.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Parameters:

count (int) – Number of 90 degree steps to rotate.

Returns:

Texture

property size: Tuple[int, int]

The virtual size of the texture in pixels.

This can be different from the actual width if the texture has been transformed or the size have been set manually.

Return type:

Tuple[int, int]

transform(transform: Type[Transform]) → Texture

Create a new texture with the given transform applied.

Parameters:

transform (Transform) – Transform to apply

Returns:

New texture

transpose() → Texture

Returns a new texture that is transposed from this texture. This flips the texture diagonally from lower right to upper left.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

transverse() → Texture

Returns a new texture that is transverse from this texture. This flips the texture diagonally from lower left to upper right.

This returns a new texture with the same image data, but has updated hit box data and a transform that will be applied to the image when it’s drawn (GPU side).

Returns:

Texture

static validate_crop(image: Image, x: int, y: int, width: int, height: int) → None

Validate the crop values for a given image.

property width: int

The virtual width of the texture in pixels. This can be different from the actual width if the texture has been transformed or the size have been set manually.

Return type:

int

arcade.cleanup_texture_cache

arcade.cleanup_texture_cache()

This cleans up the cache of textures. Useful when running unit tests so that the next test starts clean.

arcade.get_default_image

arcade.get_default_image(size: Tuple[float, float] = (128, 128)) → ImageData

Generates and returns a default image and caches it internally for future use.

Parameters:

size – Size of the image to create.

Returns:

The default image.

arcade.get_default_texture

arcade.get_default_texture(size: Tuple[float, float] = (128, 128)) → Texture

Creates and returns a default texture and caches it internally for future use.

Parameters:

size – Size of the texture to create

Returns:

The default texture.

arcade.load_spritesheet

arcade.load_spritesheet(file_name: str | Path, sprite_width: int, sprite_height: int, columns: int, count: int, margin: int = 0, hit_box_algorithm: HitBoxAlgorithm | None = None) → List[Texture]

Parameters:

• file_name (str) – Name of the file to that holds the texture.

• sprite_width (int) – Width of the sprites in pixels

• sprite_height (int) – Height of the sprites in pixels

• columns (int) – Number of tiles wide the image is.

• count (int) – Number of tiles in the image.

• margin (int) – Margin between images

• hit_box_algorithm (str) – The hit box algorithm

Returns List:

List of Texture objects.

arcade.load_texture

arcade.load_texture(file_path: str | Path, *, x: int = 0, y: int = 0, width: int = 0, height: int = 0, hit_box_algorithm: HitBoxAlgorithm | None = None) → Texture

Load an image from disk and create a texture.

The x, y, width, and height parameters are used to specify a sub-rectangle of the image to load. If not specified, the entire image is loaded.

Parameters:

• file_name (str) – Name of the file to that holds the texture.

• x (int) – X coordinate of the texture in the image.

• y (int) – Y coordinate of the texture in the image.

• width (int) – Width of the texture in the image.

• height (int) – Height of the texture in the image.

• hit_box_algorithm (str) –

Returns:

New Texture object.

Raises:

ValueError

arcade.load_texture_pair

arcade.load_texture_pair(file_name: str | Path, hit_box_algorithm: HitBoxAlgorithm | None = None) → Tuple[Texture, Texture]

Load a texture pair, with the second being a mirror image of the first. Useful when doing animations and the character can face left/right.

Parameters:

• file_name (str) – Path to texture

• hit_box_algorithm (str) – The hit box algorithm

arcade.load_textures

arcade.load_textures(file_name: str | Path, image_location_list: Tuple[Tuple[int, int, int, int] | List[int], ...] | List[Tuple[int, int, int, int] | List[int]], mirrored: bool = False, flipped: bool = False, hit_box_algorithm: HitBoxAlgorithm | None = None) → List[Texture]

Load a set of textures from a single image file.

Note: If the code is to load only part of the image, the given x, y coordinates will start with the origin (0, 0) in the upper left of the image. When drawing, Arcade uses (0, 0) in the lower left corner. Be careful with this reversal.

For a longer explanation of why computers sometimes start in the upper left, see: http://programarcadegames.com/index.php?chapter=introduction_to_graphics&lang=en#section_5

Parameters:

• file_name (str) – Name of the file.

• image_location_list (List) – List of image sub-locations. Each rectangle should be a List of four floats: [x, y, width, height].

• mirrored (bool) – If set to True, the image is mirrored left to right.

• flipped (bool) – If set to True, the image is flipped upside down.

• hit_box_algorithm (str) – One of None, ‘None’, ‘Simple’ (default) or ‘Detailed’.

• hit_box_detail (float) – Float, defaults to 4.5. Used with ‘Detailed’ to hit box

Returns:

List of Texture’s.

Raises:

ValueError

arcade.make_circle_texture

arcade.make_circle_texture(diameter: int, color: Tuple[int, int, int, int], name: str | None = None, hitbox_algorithm: HitBoxAlgorithm | None = None) → Texture

Return a Texture of a circle with the given diameter and color.

Parameters:

• diameter (int) – Diameter of the circle and dimensions of the square Texture returned.

• color (RGBA255) – Color of the circle as a Color instance a 3 or 4 tuple.

• name (str) – Custom or pre-chosen name for this texture

Returns:

New Texture object.

arcade.make_soft_circle_texture

arcade.make_soft_circle_texture(diameter: int, color: Tuple[int, int, int, int], center_alpha: int = 255, outer_alpha: int = 0, name: str | None = None, hit_box_algorithm: HitBoxAlgorithm | None = None) → Texture

Return a Texture of a circle with the given diameter and color, fading out at its edges.

Parameters:

• diameter (int) – Diameter of the circle and dimensions of the square Texture returned.

• color (RGBA255) – Color of the circle as a 4-length tuple or Color instance.

• center_alpha (int) – Alpha value of the circle at its center.

• outer_alpha (int) – Alpha value of the circle at its edges.

• name (str) – Custom or pre-chosen name for this texture

• hit_box_algorithm (str) – The hit box algorithm

Returns:

New Texture object.

Return type:

arcade.Texture

arcade.make_soft_square_texture

arcade.make_soft_square_texture(size: int, color: Tuple[int, int, int, int], center_alpha: int = 255, outer_alpha: int = 0, name: str | None = None) → Texture

Return a Texture of a square with the given diameter and color, fading out at its edges.

Parameters:

• size (int) – Diameter of the square and dimensions of the square Texture returned.

• color (RGBA255) – Color of the square.

• center_alpha (int) – Alpha value of the square at its center.

• outer_alpha (int) – Alpha value of the square at its edges.

• name (str) – Custom or pre-chosen name for this texture

Returns:

New Texture object.