nderTargetProperties.__webglFramebuffer ); state.bindFramebuffer( _gl.DRAW_FRAMEBUFFER, dstRenderTargetProperties.__webglFramebuffer ); for ( let i = 0; i < depth; i ++ ) { // if the source or destination are a 3d target then a layer needs to be bound if ( isSrc3D ) { _gl.framebufferTextureLayer( _gl.READ_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, properties.get( srcTexture ).__webglTexture, srcLevel, minZ + i ); _gl.framebufferTextureLayer( _gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, properties.get( dstTexture ).__webglTexture, dstLevel, dstZ + i ); } _gl.blitFramebuffer( minX, minY, width, height, dstX, dstY, width, height, _gl.DEPTH_BUFFER_BIT, _gl.NEAREST ); } state.bindFramebuffer( _gl.READ_FRAMEBUFFER, null ); state.bindFramebuffer( _gl.DRAW_FRAMEBUFFER, null ); } else if ( srcLevel !== 0 || srcTexture.isRenderTargetTexture || properties.has( srcTexture ) ) { // get the appropriate frame buffers const srcTextureProperties = properties.get( srcTexture ); const dstTextureProperties = properties.get( dstTexture ); // bind the frame buffer targets state.bindFramebuffer( _gl.READ_FRAMEBUFFER, _srcFramebuffer ); state.bindFramebuffer( _gl.DRAW_FRAMEBUFFER, _dstFramebuffer ); for ( let i = 0; i < depth; i ++ ) { // assign the correct layers and mip maps to the frame buffers if ( isSrc3D ) { _gl.framebufferTextureLayer( _gl.READ_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, srcTextureProperties.__webglTexture, srcLevel, minZ + i ); } else { _gl.framebufferTexture2D( _gl.READ_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D, srcTextureProperties.__webglTexture, srcLevel ); } if ( isDst3D ) { _gl.framebufferTextureLayer( _gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, dstTextureProperties.__webglTexture, dstLevel, dstZ + i ); } else { _gl.framebufferTexture2D( _gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D, dstTextureProperties.__webglTexture, dstLevel ); } // copy the data using the fastest function that can achieve the copy if ( srcLevel !== 0 ) { _gl.blitFramebuffer( minX, minY, width, height, dstX, dstY, width, height, _gl.COLOR_BUFFER_BIT, _gl.NEAREST ); } else if ( isDst3D ) { _gl.copyTexSubImage3D( glTarget, dstLevel, dstX, dstY, dstZ + i, minX, minY, width, height ); } else { _gl.copyTexSubImage2D( glTarget, dstLevel, dstX, dstY, minX, minY, width, height ); } } // unbind read, draw buffers state.bindFramebuffer( _gl.READ_FRAMEBUFFER, null ); state.bindFramebuffer( _gl.DRAW_FRAMEBUFFER, null ); } else { if ( isDst3D ) { // copy data into the 3d texture if ( srcTexture.isDataTexture || srcTexture.isData3DTexture ) { _gl.texSubImage3D( glTarget, dstLevel, dstX, dstY, dstZ, width, height, depth, glFormat, glType, image.data ); } else if ( dstTexture.isCompressedArrayTexture ) { _gl.compressedTexSubImage3D( glTarget, dstLevel, dstX, dstY, dstZ, width, height, depth, glFormat, image.data ); } else { _gl.texSubImage3D( glTarget, dstLevel, dstX, dstY, dstZ, width, height, depth, glFormat, glType, image ); } } else { // copy data into the 2d texture if ( srcTexture.isDataTexture ) { _gl.texSubImage2D( _gl.TEXTURE_2D, dstLevel, dstX, dstY, width, height, glFormat, glType, image.data ); } else if ( srcTexture.isCompressedTexture ) { _gl.compressedTexSubImage2D( _gl.TEXTURE_2D, dstLevel, dstX, dstY, image.width, image.height, glFormat, image.data ); } else { _gl.texSubImage2D( _gl.TEXTURE_2D, dstLevel, dstX, dstY, width, height, glFormat, glType, image ); } } } // reset values state.pixelStorei( _gl.UNPACK_ROW_LENGTH, currentUnpackRowLen ); state.pixelStorei( _gl.UNPACK_IMAGE_HEIGHT, currentUnpackImageHeight ); state.pixelStorei( _gl.UNPACK_SKIP_PIXELS, currentUnpackSkipPixels ); state.pixelStorei( _gl.UNPACK_SKIP_ROWS, currentUnpackSkipRows ); state.pixelStorei( _gl.UNPACK_SKIP_IMAGES, currentUnpackSkipImages ); // Generate mipmaps only when copying level 0 if ( dstLevel === 0 && dstTexture.generateMipmaps ) { _gl.generateMipmap( glTarget ); } state.unbindTexture(); }; /** * Initializes the given WebGLRenderTarget memory. Useful for initializing a render target so data * can be copied into it using {@link WebGLRenderer#copyTextureToTexture} before it has been * rendered to. * * @param {WebGLRenderTarget} target - The render target. */ this.initRenderTarget = function ( target ) { if ( properties.get( target ).__webglFramebuffer === undefined ) { textures.setupRenderTarget( target ); } }; /** * Initializes the given texture. Useful for preloading a texture rather than waiting until first * render (which can cause noticeable lags d