From c78cca7a9e656f81511afff2f4ff7d2b6359df5e Mon Sep 17 00:00:00 2001
From: FMS-Cat <yutaka.obuchi@gmail.com>
Date: Mon, 29 Mar 2021 23:13:12 +0900
Subject: [PATCH] performance: NEAREST BufferRenderTarget

---
 src/entities/DeferredCamera.ts | 1 +
 src/entities/GPUParticles.ts   | 2 ++
 src/entities/PixelSorter.ts    | 4 ++++
 src/heck/BufferRenderTarget.ts | 5 +++++
 4 files changed, 12 insertions(+)

diff --git a/src/entities/DeferredCamera.ts b/src/entities/DeferredCamera.ts
index 096d1f4..920d261 100644
--- a/src/entities/DeferredCamera.ts
+++ b/src/entities/DeferredCamera.ts
@@ -35,6 +35,7 @@ export class DeferredCamera extends Entity {
       height: options.target.height,
       numBuffers: 4,
       name: 'DeferredCamera/cameraTarget',
+      filter: gl.NEAREST,
     } );
 
     const camera = new PerspectiveCamera( {
diff --git a/src/entities/GPUParticles.ts b/src/entities/GPUParticles.ts
index 8e09a5a..feb8e48 100644
--- a/src/entities/GPUParticles.ts
+++ b/src/entities/GPUParticles.ts
@@ -42,10 +42,12 @@ export class GPUParticles extends Entity {
       new BufferRenderTarget( {
         ...brtOptions,
         name: process.env.DEV && `${ namePrefix }/swap0`,
+        filter: gl.NEAREST,
       } ),
       new BufferRenderTarget( {
         ...brtOptions,
         name: process.env.DEV && `${ namePrefix }/swap1`,
+        filter: gl.NEAREST,
       } ),
     );
 
diff --git a/src/entities/PixelSorter.ts b/src/entities/PixelSorter.ts
index 6742773..39608f2 100644
--- a/src/entities/PixelSorter.ts
+++ b/src/entities/PixelSorter.ts
@@ -7,6 +7,7 @@ import { RenderTarget } from '../heck/RenderTarget';
 import { Swap } from '@fms-cat/experimental';
 import { auto } from '../globals/automaton';
 import { dummyRenderTarget } from '../globals/dummyRenderTarget';
+import { gl } from '../globals/canvas';
 import { quadGeometry } from '../globals/quadGeometry';
 import pixelSorterFrag from '../shaders/pixel-sorter.frag';
 import pixelSorterIndexFrag from '../shaders/pixel-sorter-index.frag';
@@ -38,11 +39,13 @@ export class PixelSorter extends Entity {
         width: options.target.width,
         height: options.target.height,
         name: process.env.DEV && 'PixelSorter/swap0',
+        filter: gl.NEAREST,
       } ),
       new BufferRenderTarget( {
         width: options.target.width,
         height: options.target.height,
         name: process.env.DEV && 'PixelSorter/swap1',
+        filter: gl.NEAREST,
       } ),
     );
 
@@ -50,6 +53,7 @@ export class PixelSorter extends Entity {
       width: options.target.width,
       height: options.target.height,
       name: process.env.DEV && 'PixelSorter/index',
+      filter: gl.NEAREST,
     } );
 
     // -- bypass -----------------------------------------------------------------------------------
diff --git a/src/heck/BufferRenderTarget.ts b/src/heck/BufferRenderTarget.ts
index 0466462..a479d0b 100644
--- a/src/heck/BufferRenderTarget.ts
+++ b/src/heck/BufferRenderTarget.ts
@@ -8,6 +8,7 @@ export interface BufferRenderTargetOptions {
   numBuffers?: number;
   isFloat?: boolean;
   name?: string;
+  filter?: GLenum;
 }
 
 export class BufferRenderTarget extends RenderTarget {
@@ -61,6 +62,10 @@ export class BufferRenderTarget extends RenderTarget {
     this.height = options.height;
     this.numBuffers = options.numBuffers ?? 1;
 
+    if ( options.filter != null ) {
+      this.texture.textureFilter( options.filter );
+    }
+
     if ( process.env.DEV ) {
       this.name = options?.name;
     }