Module forward_plus 

Defines data structures for Forward+ (Tiled Forward) rendering.

Forward+ is an advanced rendering technique that optimizes multi-light scenarios by dividing the screen into tiles and pre-computing which lights affect each tile using a compute shader pass.

SAA Integration

The ForwardPlusLane is a strategy of the RenderAgent ISA. The agent can select between LitForwardLane and ForwardPlusLane based on:

• Scene light count (Forward+ typically wins when > 20 lights)
• GORNA budget allocation

Performance Characteristics

• Complexity: O(meshes × lights_per_tile) vs O(meshes × lights) for Forward
• Overhead: Fixed compute pass cost for light culling (~0.5ms)
• Memory: Light grid and index buffers scale with screen resolution

Structs

ForwardPlusTileConfig

Configuration for Forward+ tiled rendering.

GpuLight

GPU-friendly representation of a light source for compute shader processing.

LightCullingUniforms

Uniforms for the light culling compute shader.

Enums

TileSize

The tile size for Forward+ light culling.