@tmrw-realityos/charm

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@tmrw-realityos/charm / HDRLoader

Class: HDRLoader

Defined in: packages/charm/src/helpers/HDRLoader.ts:8

Constructors

new HDRLoader()

new HDRLoader(): HDRLoader

Returns

HDRLoader

Methods

load()

load(url): Promise<HDREnvironment>

Defined in: packages/charm/src/helpers/HDRLoader.ts:105

Load radiance HDR from file and create HDREnvironment. Only supports 32-bit_rle_rgbe.

Parameters

url

string

hdr filepath

Returns

Promise<HDREnvironment>

HDR environment

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parse()

parse(buffer): HDREnvironment

Defined in: packages/charm/src/helpers/HDRLoader.ts:116

Similar to load but parses data from an arraybuffer.

Parameters

buffer

Uint8Array

Data in radiance HDR format

Returns

HDREnvironment

HDR environment

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floatToRgb9e5()

static floatToRgb9e5(buffer): Uint32Array

Defined in: packages/charm/src/helpers/HDRLoader.ts:80

Convert a float buffer to a RGB9E5 buffer. (ref https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_texture_shared_exponent.txt)

Parameters

buffer

Float32Array

Floating point input buffer (96 bits/pixel).

Returns

Uint32Array

A 32bit uint32 array in RGB9E5

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rgbeToFloat()

static rgbeToFloat(buffer): Float32Array

Defined in: packages/charm/src/helpers/HDRLoader.ts:14

Convert rgbe to float.

Parameters

buffer

Uint8Array

pixel data in rgbe format

Returns

Float32Array

RGB pixel data in float32 format

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rgbeToFloat4()

static rgbeToFloat4(buffer): Float32Array

Defined in: packages/charm/src/helpers/HDRLoader.ts:62

Convert rgbe to four component float. The fourth component is 0.

Parameters

buffer

Uint8Array

data in rgbe format

Returns

Float32Array

RGBA pixel data in float32 format

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rgbeToRgb9e5()

static rgbeToRgb9e5(buffer): Uint32Array

Defined in: packages/charm/src/helpers/HDRLoader.ts:33

Convert RGB8E8 to RGB9E5 format

Parameters

buffer

Uint8Array

data in rgbe format

Returns

Uint32Array

RGBE pixel data packed in 32bit uint.