HdrLiftGammaGain

HDR Lift Gamma Gain Color Grading

Code Name: HdrLiftGammaGain

Description

This example demonstrates scene-referred lift/gamma/gain applied to the linear HDR scene color before tone mapping. Users can select some default color presets (Teal & Orange, Golden Hour, Cold Bleak, Sticky Green) via number keys, and they can also adjust offsets and exposure values.

Output

Controls

Input	Action
W/A/S/D	Move the camera
Mouse	Look around with the camera
Esc	Close the window
Space	Reset all values to default
0	Apply color preset: Neutral
1	Apply color preset: Teal & Orange
2	Apply color preset: Golden Hour
3	Apply color preset: Cold Bleak
4	Apply color preset: Sticky Green
Q	Increase exposure value
E	Decrease exposure value
R	Increase lift offset value
F	Decrease lift offset value
T	Increase gamma offset value
G	Decrease gamma offset value
Y	Increase gain offset value
H	Decrease gain offset value

Application Parameters

Settings

Parameter / Key	Type	Usage in Code	Description	Default Value
AppSettings.ClearColor	VkClearColorValue	AppSettings::ClearColor	Background color of the screen
AppSettings.MouseSensitivity	float	AppSettings::MouseSensitivity	Mouse sensitivity value
AppSettings.CameraSpeed	float	AppSettings::CameraSpeed	Speed of the camera

Learning Objectives

• Understanding how to implement scene-referred lift/gamma/gain applied to the linear HDR scene color

Shader Status

Shader Type	Status	Notes
GLSL	✅
HLSL	❌	Will be implemented.
Slang	❌	Will be implemented.

Theoretical Background

None

Extensions Used

Instance

Window system-dependent extensions:

• VK_KHR_surface
• VK_KHR_win32_surface (Windows)

Device

• VK_KHR_swapchain