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WebGLRenderer: Support MRT for 2d array textures #31476

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Merged
Mugen87 merged 1 commit into from
Jul 22, 2025
Merged

WebGLRenderer: Support MRT for 2d array textures #31476

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10 changes: 8 additions & 2 deletions src/renderers/WebGLRenderer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2811,9 +2811,15 @@ class WebGLRenderer {

} else if ( isRenderTarget3D ) {

const textureProperties = properties.get( renderTarget.texture );
const layer = activeCubeFace;
_gl.framebufferTextureLayer( _gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, textureProperties.__webglTexture, activeMipmapLevel, layer );

for ( let i = 0; i < renderTarget.textures.length; i ++ ) {

const textureProperties = properties.get( renderTarget.textures[ i ] );

_gl.framebufferTextureLayer( _gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, textureProperties.__webglTexture, activeMipmapLevel, layer );

}

} else if ( renderTarget !== null && activeMipmapLevel !== 0 ) {

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20 changes: 14 additions & 6 deletions src/renderers/webgl/WebGLTextures.js
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Original file line number Diff line number Diff line change
Expand Up @@ -544,7 +544,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,

const textureProperties = properties.get( texture );

if ( texture.version > 0 && textureProperties.__version !== texture.version ) {
if ( texture.isRenderTargetTexture === false && texture.version > 0 && textureProperties.__version !== texture.version ) {

uploadTexture( textureProperties, texture, slot );
return;
Expand All @@ -559,7 +559,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,

const textureProperties = properties.get( texture );

if ( texture.version > 0 && textureProperties.__version !== texture.version ) {
if ( texture.isRenderTargetTexture === false && texture.version > 0 && textureProperties.__version !== texture.version ) {

uploadTexture( textureProperties, texture, slot );
return;
Expand Down Expand Up @@ -2002,13 +2002,21 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
const attachment = textures[ i ];
const attachmentProperties = properties.get( attachment );

state.bindTexture( _gl.TEXTURE_2D, attachmentProperties.__webglTexture );
setTextureParameters( _gl.TEXTURE_2D, attachment );
setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, attachment, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, 0 );
let glTextureType = _gl.TEXTURE_2D;

if ( renderTarget.isWebGL3DRenderTarget || renderTarget.isWebGLArrayRenderTarget ) {

glTextureType = renderTarget.isWebGL3DRenderTarget ? _gl.TEXTURE_3D : _gl.TEXTURE_2D_ARRAY;

}

state.bindTexture( glTextureType, attachmentProperties.__webglTexture );
setTextureParameters( glTextureType, attachment );
setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, attachment, _gl.COLOR_ATTACHMENT0 + i, glTextureType, 0 );

if ( textureNeedsGenerateMipmaps( attachment ) ) {

generateMipmap( _gl.TEXTURE_2D );
generateMipmap( glTextureType );

}

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