1, renderTarget.width >> level ); const height = Math.max( 1, renderTarget.height >> level ); if ( textureTarget === _gl.TEXTURE_3D || textureTarget === _gl.TEXTURE_2D_ARRAY ) { state.texImage3D( textureTarget, level, glInternalFormat, width, height, renderTarget.depth, 0, glFormat, glType, null ); } else { state.texImage2D( textureTarget, level, glInternalFormat, width, height, 0, glFormat, glType, null ); } } state.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer ); if ( useMultisampledRTT( renderTarget ) ) { multisampledRTTExt.framebufferTexture2DMultisampleEXT( _gl.FRAMEBUFFER, attachment, textureTarget, properties.get( texture ).__webglTexture, 0, getRenderTargetSamples( renderTarget ) ); } else if ( textureTarget === _gl.TEXTURE_2D || ( textureTarget >= _gl.TEXTURE_CUBE_MAP_POSITIVE_X && textureTarget <= _gl.TEXTURE_CUBE_MAP_NEGATIVE_Z ) ) { // see #24753 _gl.framebufferTexture2D( _gl.FRAMEBUFFER, attachment, textureTarget, properties.get( texture ).__webglTexture, level ); } state.bindFramebuffer( _gl.FRAMEBUFFER, null ); } // Setup storage for internal depth/stencil buffers and bind to correct framebuffer function setupRenderBufferStorage( renderbuffer, renderTarget, isMultisample ) { _gl.bindRenderbuffer( _gl.RENDERBUFFER, renderbuffer ); if ( renderTarget.depthBuffer ) { // retrieve the depth attachment types const depthTexture = renderTarget.depthTexture; const depthType = depthTexture && depthTexture.isDepthTexture ? depthTexture.type : null; const glInternalFormat = getInternalDepthFormat( renderTarget.stencilBuffer, depthType ); const glAttachmentType = renderTarget.stencilBuffer ? _gl.DEPTH_STENCIL_ATTACHMENT : _gl.DEPTH_ATTACHMENT; // set up the attachment const samples = getRenderTargetSamples( renderTarget ); const isUseMultisampledRTT = useMultisampledRTT( renderTarget ); if ( isUseMultisampledRTT ) { multisampledRTTExt.renderbufferStorageMultisampleEXT( _gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height ); } else if ( isMultisample ) { _gl.renderbufferStorageMultisample( _gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height ); } else { _gl.renderbufferStorage( _gl.RENDERBUFFER, glInternalFormat, renderTarget.width, renderTarget.height ); } _gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, glAttachmentType, _gl.RENDERBUFFER, renderbuffer ); } else { const textures = renderTarget.textures; for ( let i = 0; i < textures.length; i ++ ) { const texture = textures[ i ]; const glFormat = utils.convert( texture.format, texture.colorSpace ); const glType = utils.convert( texture.type ); const glInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType, texture.colorSpace ); const samples = getRenderTargetSamples( renderTarget ); if ( isMultisample && useMultisampledRTT( renderTarget ) === false ) { _gl.renderbufferStorageMultisample( _gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height ); } else if ( useMultisampledRTT( renderTarget ) ) { multisampledRTTExt.renderbufferStorageMultisampleEXT( _gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height ); } else { _gl.renderbufferStorage( _gl.RENDERBUFFER, glInternalFormat, renderTarget.width, renderTarget.height ); } } } _gl.bindRenderbuffer( _gl.RENDERBUFFER, null ); } // Setup resources for a Depth Texture for a FBO (needs an extension) function setupDepthTexture( framebuffer, renderTarget ) { const isCube = ( renderTarget && renderTarget.isWebGLCubeRenderTarget ); if ( isCube ) throw new Error( 'Depth Texture with cube render targets is not supported' ); state.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer ); if ( ! ( renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture ) ) { throw new Error( 'renderTarget.depthTexture must be an instance of THREE.DepthTexture' ); } // upload an empty depth texture with framebuffer size if ( ! properties.get( renderTarget.depthTexture ).__webglTexture || renderTarget.depthTexture.image.width !== renderTarget.width || renderTarget.depthTexture.image.height !== renderTarget.height ) { renderTarget.depthTexture.image.width = renderTarget.width; renderTarget.depthTexture.image.height = renderTarget.height; renderTarget.depthTexture.needsUpdate = true; } setTexture2D( renderTarget.depthTexture, 0 ); const webglDepthTexture = properties.get( renderTarget.depthTexture ).__webglTexture; const samples = getRenderTargetSamples( renderTarget ); if ( renderTarget.depthTexture.format === DepthFormat ) { if ( useMultisampledRTT( renderTarget ) ) { multisampledRTTExt.framebufferTexture2DMultisampleEXT( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0