Struct GBufferLayout 

pub struct GBufferLayout {
    pub color_attachments: Vec<GBufferAttachment>,
    pub depth_attachment: GBufferAttachment,
    pub max_color_attachments: u32,
    pub use_octahedral_normals: bool,
    pub thin_gbuffer: bool,
}

Describes the full set of attachments in a G-Buffer.

The default layout provides:

• Position (RGBA32F) at color attachment 0
• Normal (RG16F, octahedral encoding) at color attachment 1
• Albedo (RGBA8) at color attachment 2
• Emission (RGBA16F) at color attachment 3
• MaterialID (R8) at color attachment 4
• Roughness (R8) at color attachment 5
• Metallic (R8) at color attachment 6
• Depth (D32F) as the depth attachment

Fields

color_attachments: Vec<GBufferAttachment>

Ordered list of color attachments.

depth_attachment: GBufferAttachment

The depth (or depth-stencil) attachment.

max_color_attachments: u32

Maximum number of simultaneous render targets supported.

use_octahedral_normals: bool

Whether to use octahedral normal encoding (saves bandwidth vs RGBA16F).

thin_gbuffer: bool

Whether thin G-Buffer packing is enabled (combine roughness+metallic into one RG8).

Implementations

impl GBufferLayout

pub fn new() -> Self

Create a new empty layout.

pub fn default_layout() -> Self

Create the default G-Buffer layout used by the deferred pipeline.

pub fn thin_layout() -> Self

Create a thin/minimal G-Buffer layout that packs more data per attachment. Uses fewer render targets at the cost of some precision.

pub fn add_color_attachment(&mut self, attachment: GBufferAttachment)

Add a color attachment to the layout.

pub fn remove_attachment(&mut self, semantic: GBufferSemantic) -> bool

Remove a color attachment by semantic.

pub fn find_attachment( &self, semantic: GBufferSemantic, ) -> Option<&GBufferAttachment>

Find an attachment by semantic.

pub fn find_attachment_mut( &mut self, semantic: GBufferSemantic, ) -> Option<&mut GBufferAttachment>

Find an attachment by semantic (mutable).

pub fn color_attachment_count(&self) -> u32

Total number of color attachments.

pub fn total_memory_bytes(&self, width: u32, height: u32) -> u64

Calculate total memory usage for a given resolution.

pub fn validate(&self) -> Vec<String>

Validate the layout, returning any issues found.

Trait Implementations

impl Clone for GBufferLayout

fn clone(&self) -> GBufferLayout

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GBufferLayout

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for GBufferLayout

fn default() -> Self

Returns the “default value” for a type.