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WebGLRenderer: Enable subframe upload in copyTextureToTexture, align API to 3d version #28281

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merged 17 commits into from
May 7, 2024
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WebGLRenderer: Enable subframe upload in copyTextureToTexture, align API to 3d version #28281

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105488b
align WebGLRenderer.copyTextureToTexture with copyTextureToTexture3D
gkjohnson May 4, 2024
38c2f1d
Make the function backwards compatible
gkjohnson May 4, 2024
8e3deaf
Add import statement
gkjohnson May 4, 2024
55a12e2
Fix example
gkjohnson May 4, 2024
1e8b861
Merge remote-tracking branch 'mrdoob/dev' into copy-texture-update
gkjohnson May 6, 2024
9f62ed6
rename local state variables
gkjohnson May 6, 2024
67c1f1b
Add deprecation comment
gkjohnson May 6, 2024
2944a86
Update docs
gkjohnson May 6, 2024
f5c7761
Update API signatures
gkjohnson May 6, 2024
7398afd
Simplify
gkjohnson May 6, 2024
dc0a918
Update examples
gkjohnson May 6, 2024
e6dade6
Remove unused Box2
gkjohnson May 6, 2024
a23be2f
Add comment
gkjohnson May 6, 2024
f4f22ae
Update function signatures
gkjohnson May 7, 2024
2327394
examples update
gkjohnson May 7, 2024
37fe3b7
docs update
gkjohnson May 7, 2024
afc4869
Fix docs
gkjohnson May 7, 2024
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6 changes: 5 additions & 1 deletion examples/webgl_materials_texture_partialupdate.html
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@
let last = 0;
const position = new THREE.Vector2();
const color = new THREE.Color();
const box = new THREE.Box2();

init();

Expand Down Expand Up @@ -103,7 +104,10 @@

// perform copy from src to dest texture to a random position

renderer.copyTextureToTexture( position, dataTexture, diffuseMap );
box.min.set( 0, 0 );
box.max.set( dataTexture.image.width, dataTexture.image.height );

renderer.copyTextureToTexture( box, position, dataTexture, diffuseMap );

}

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48 changes: 42 additions & 6 deletions src/renderers/WebGLRenderer.js
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Expand Up @@ -56,6 +56,7 @@ import { WebGLMaterials } from './webgl/WebGLMaterials.js';
import { WebGLUniformsGroups } from './webgl/WebGLUniformsGroups.js';
import { createCanvasElement } from '../utils.js';
import { ColorManagement } from '../math/ColorManagement.js';
import { Box2 } from '../math/Box2.js';

class WebGLRenderer {

Expand Down Expand Up @@ -2371,10 +2372,26 @@ class WebGLRenderer {

};

this.copyTextureToTexture = function ( position, srcTexture, dstTexture, level = 0 ) {
this.copyTextureToTexture = function ( sourceBox, position, srcTexture, dstTexture, level = 0 ) {
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const width = srcTexture.image.width;
const height = srcTexture.image.height;
if ( sourceBox.isBox2 !== true ) {

console.warn( 'WebGLRenderer: copyTextureToTexture function signature has changed.' );

position = arguments[ 0 ];
srcTexture = arguments[ 1 ];
dstTexture = arguments[ 2 ];
level = arguments[ 3 ];

const image = srcTexture.isCompressedTexture ? srcTexture.mipmaps[ level ] : srcTexture.image;
sourceBox = new Box2();
sourceBox.min.set( 0, 0 );
sourceBox.max.set( image.width, image.height );

}
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const width = sourceBox.max.x - sourceBox.min.x;
const height = sourceBox.max.y - sourceBox.min.y;
const glFormat = utils.convert( dstTexture.format );
const glType = utils.convert( dstTexture.type );

Expand All @@ -2386,24 +2403,43 @@ class WebGLRenderer {
_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, dstTexture.premultiplyAlpha );
_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, dstTexture.unpackAlignment );

const unpackRowLen = _gl.getParameter( _gl.UNPACK_ROW_LENGTH );
const unpackImageHeight = _gl.getParameter( _gl.UNPACK_IMAGE_HEIGHT );
const unpackSkipPixels = _gl.getParameter( _gl.UNPACK_SKIP_PIXELS );
const unpackSkipRows = _gl.getParameter( _gl.UNPACK_SKIP_ROWS );
const unpackSkipImages = _gl.getParameter( _gl.UNPACK_SKIP_IMAGES );

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const image = srcTexture.isCompressedTexture ? srcTexture.mipmaps[ level ] : srcTexture.image;

_gl.pixelStorei( _gl.UNPACK_ROW_LENGTH, image.width );
_gl.pixelStorei( _gl.UNPACK_IMAGE_HEIGHT, image.height );
_gl.pixelStorei( _gl.UNPACK_SKIP_PIXELS, sourceBox.min.x );
_gl.pixelStorei( _gl.UNPACK_SKIP_ROWS, sourceBox.min.y );

if ( srcTexture.isDataTexture ) {

_gl.texSubImage2D( _gl.TEXTURE_2D, level, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data );
_gl.texSubImage2D( _gl.TEXTURE_2D, level, position.x, position.y, width, height, glFormat, glType, image.data );

} else {

if ( srcTexture.isCompressedTexture ) {

_gl.compressedTexSubImage2D( _gl.TEXTURE_2D, level, position.x, position.y, srcTexture.mipmaps[ 0 ].width, srcTexture.mipmaps[ 0 ].height, glFormat, srcTexture.mipmaps[ 0 ].data );
_gl.compressedTexSubImage2D( _gl.TEXTURE_2D, level, position.x, position.y, image.width, image.height, glFormat, image.data );
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One other discrepancy I noticed between the copyTextureToTexture and copyTextureToTexture3D implementations is that the 3D variant used "level" to index into the source textures mipmap array whereas it was always 0 in the 2d version. I've aligned to what the 3d function was doing but am happy to change it either way.


} else {

_gl.texSubImage2D( _gl.TEXTURE_2D, level, position.x, position.y, glFormat, glType, srcTexture.image );
_gl.texSubImage2D( _gl.TEXTURE_2D, level, position.x, position.y, glFormat, glType, image );

}

}

_gl.pixelStorei( _gl.UNPACK_ROW_LENGTH, unpackRowLen );
_gl.pixelStorei( _gl.UNPACK_IMAGE_HEIGHT, unpackImageHeight );
_gl.pixelStorei( _gl.UNPACK_SKIP_PIXELS, unpackSkipPixels );
_gl.pixelStorei( _gl.UNPACK_SKIP_ROWS, unpackSkipRows );
_gl.pixelStorei( _gl.UNPACK_SKIP_IMAGES, unpackSkipImages );

// Generate mipmaps only when copying level 0
if ( level === 0 && dstTexture.generateMipmaps ) _gl.generateMipmap( _gl.TEXTURE_2D );

Expand Down