Module hdr 

HDR Render Target — 16-bit float framebuffer with tone mapping and exposure control.

Changes the scene framebuffer from RGBA8 to RGBA16F, allowing color values above 1.0. Crits and spell effects can be 10x brighter than normal without clipping, creating dramatic contrast when tone mapped back to SDR for display.

Tone mapping operators

• Reinhard: Simple, preserves colors well. c / (1 + c)
• ACES: Academy Color Encoding System filmic curve. Industry standard.
• Uncharted2: John Hable’s filmic operator from Uncharted 2.

Exposure control

• Auto-exposure: Adapts based on scene average luminance (eye adaptation).
• Manual: Fixed exposure value for specific moments (death, boss intro).

Structs

AutoExposure

Tracks scene luminance and computes auto-exposure.

ExposurePresets

Exposure presets for specific game moments.

HdrParams

HDR rendering parameters.

HdrStats

Per-frame HDR rendering statistics.

Enums

ExposureMode

Exposure control mode.

ToneMapOperator

Available tone mapping operators.

Constants

HDR_TONEMAP_FRAG

HDR tone mapping + exposure fragment shader. Applied as the final post-processing pass before display.

LUMINANCE_FRAG

Luminance computation shader for auto-exposure. Computes log-average luminance of the scene.