carta::Tile Struct Reference

Represents a tile in a multi-resolution grid with spatial coordinates and a resolution layer. More...

#include <Tile.h>

Collaboration diagram for carta::Tile:

Static Public Member Functions
static int32_t	Encode (int32_t x, int32_t y, int32_t layer)
	Encodes tile coordinates and layer into a 32-bit integer.
static Tile	Decode (int32_t encoded_value)
	Decodes a 32-bit integer into a Tile object.
static int32_t	LayerToMip (int32_t layer, int32_t image_width, int32_t image_height, int32_t tile_width, int32_t tile_height)
	Converts a layer index to the corresponding mipmap size.

Public Attributes
int32_t	x
int32_t	y
int32_t	layer

Detailed Description

Represents a tile in a multi-resolution grid with spatial coordinates and a resolution layer.

The Tile struct contains 2D spatial coordinates (x, y) and a resolution layer. It provides methods to encode/decode tile information into/from a 32-bit integer, and convert between resolution layers and mipmap levels.

Member Function Documentation

Decode()

static Tile carta::Tile::Decode ( int32_t  encoded_value )

inlinestatic

Decodes a 32-bit integer into a Tile object.

Parameters

encoded_value

The encoded 32-bit integer.

Returns

A Tile object with decoded x, y, and layer values.

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Encode()

static int32_t carta::Tile::Encode ( int32_t  x, int32_t  y, int32_t  layer  )

inlinestatic

Encodes tile coordinates and layer into a 32-bit integer.

Parameters

x	The X coordinate (must be greater than or equal to 0 and less than 2 to the power of the layer).
y	The Y coordinate (must be greater than or equal to 0 and less than 2 to the power of the layer).
layer	The layer index (must be between 0 and 12).

Returns

Encoded 32-bit integer value, or -1 if input is invalid.

LayerToMip()

static int32_t carta::Tile::LayerToMip ( int32_t  layer, int32_t  image_width, int32_t  image_height, int32_t  tile_width, int32_t  tile_height  )

inlinestatic

Converts a layer index to the corresponding mipmap size.

Parameters

layer	The layer index to convert.
image_width	The width of the full-resolution image.
image_height	The height of the full-resolution image.
tile_width	The width of a tile in pixels.
tile_height	The height of a tile in pixels.

Returns

The mip size corresponding to the given layer.

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Member Data Documentation

layer

int32_t carta::Tile::layer

The resolution layer of the tile.

x

int32_t carta::Tile::x

The X coordinate of the tile.

y

int32_t carta::Tile::y

The Y coordinate of the tile.

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The documentation for this struct was generated from the following file:

• Tile.h