A ) { const transfer = forceLinearTransfer ? LinearTransfer : ColorManagement.getTransfer( colorSpace ); if ( glType === _gl.FLOAT ) internalFormat = _gl.RGBA32F; if ( glType === _gl.HALF_FLOAT ) internalFormat = _gl.RGBA16F; if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = ( transfer === SRGBTransfer ) ? _gl.SRGB8_ALPHA8 : _gl.RGBA8; if ( glType === _gl.UNSIGNED_SHORT && ext_texture_norm16 ) internalFormat = ext_texture_norm16.RGBA16_EXT; if ( glType === _gl.SHORT && ext_texture_norm16 ) internalFormat = ext_texture_norm16.RGBA16_SNORM_EXT; if ( glType === _gl.UNSIGNED_SHORT_4_4_4_4 ) internalFormat = _gl.RGBA4; if ( glType === _gl.UNSIGNED_SHORT_5_5_5_1 ) internalFormat = _gl.RGB5_A1; } if ( internalFormat === _gl.R16F || internalFormat === _gl.R32F || internalFormat === _gl.RG16F || internalFormat === _gl.RG32F || internalFormat === _gl.RGBA16F || internalFormat === _gl.RGBA32F ) { extensions.get( 'EXT_color_buffer_float' ); } return internalFormat; } function getInternalDepthFormat( useStencil, depthType ) { let glInternalFormat; if ( useStencil ) { if ( depthType === null || depthType === UnsignedIntType || depthType === UnsignedInt248Type ) { glInternalFormat = _gl.DEPTH24_STENCIL8; } else if ( depthType === FloatType ) { glInternalFormat = _gl.DEPTH32F_STENCIL8; } else if ( depthType === UnsignedShortType ) { glInternalFormat = _gl.DEPTH24_STENCIL8; warn( 'DepthTexture: 16 bit depth attachment is not supported with stencil. Using 24-bit attachment.' ); } } else { if ( depthType === null || depthType === UnsignedIntType || depthType === UnsignedInt248Type ) { glInternalFormat = _gl.DEPTH_COMPONENT24; } else if ( depthType === FloatType ) { glInternalFormat = _gl.DEPTH_COMPONENT32F; } else if ( depthType === UnsignedShortType ) { glInternalFormat = _gl.DEPTH_COMPONENT16; } } return glInternalFormat; } function getMipLevels( texture, image ) { if ( textureNeedsGenerateMipmaps( texture ) === true || ( texture.isFramebufferTexture && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) ) { return Math.log2( Math.max( image.width, image.height ) ) + 1; } else if ( texture.mipmaps !== undefined && texture.mipmaps.length > 0 ) { // user-defined mipmaps return texture.mipmaps.length; } else if ( texture.isCompressedTexture && Array.isArray( texture.image ) ) { return image.mipmaps.length; } else { // texture without mipmaps (only base level) return 1; } } // function onTextureDispose( event ) { const texture = event.target; texture.removeEventListener( 'dispose', onTextureDispose ); deallocateTexture( texture ); if ( texture.isVideoTexture ) { _videoTextures.delete( texture ); } if ( texture.isHTMLTexture ) { _htmlTextures.delete( texture ); } } function onRenderTargetDispose( event ) { const renderTarget = event.target; renderTarget.removeEventListener( 'dispose', onRenderTargetDispose ); deallocateRenderTarget( renderTarget ); } // function deallocateTexture( texture ) { const textureProperties = properties.get( texture ); if ( textureProperties.__webglInit === undefined ) return; // check if it's necessary to remove the WebGLTexture object const source = texture.source; const webglTextures = _sources.get( source ); if ( webglTextures ) { const webglTexture = webglTextures[ textureProperties.__cacheKey ]; webglTexture.usedTimes --; // the WebGLTexture object is not used anymore, remove it if ( webglTexture.usedTimes === 0 ) { deleteTexture( texture ); } // remove the weak map entry if no WebGLTexture uses the source anymore if ( Object.keys( webglTextures ).length === 0 ) { _sources.delete( source ); } } properties.remove( texture ); } function deleteTexture( texture ) { const textureProperties = properties.get( texture ); _gl.deleteTexture( textureProperties.__webglTexture ); const source = texture.source; const webglTextures = _sources.get( source ); delete webglTextures[ textureProperties.__cacheKey ]; info.memory.textures --; } function deallocateRenderTarget( renderTarget ) { const renderTargetProperties = properties.get( renderTarget ); if ( renderTarget.depthTexture ) { renderTarget.depthTexture.dispose(); properties.remove( renderTarget.depthTexture ); } if ( renderTarget.isWebGLCubeRenderTarget ) { for ( let i = 0; i < 6; i ++ ) { if ( Array.isArray( renderTargetProperties.__webglFramebuffer[ i ] ) ) { for ( let level = 0; level < renderTargetProperties.__webglFramebuffer[ i ].length; level ++ ) _gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ][ level ] ); } else { _gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] ); }