molstar
Version:
A comprehensive macromolecular library.
68 lines (67 loc) • 2.53 kB
JavaScript
/**
* Copyright (c) 2018-2025 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
*/
import { idFactory } from '../../mol-util/id-factory.js';
import { isWebGL2 } from './compat.js';
const getNextRenderTargetId = idFactory();
export function createRenderTarget(gl, resources, _width, _height, depth = true, type = 'uint8', filter = 'nearest', format = 'rgba') {
if (format === 'alpha' && !isWebGL2(gl)) {
throw new Error('cannot render to alpha format in webgl1');
}
const framebuffer = resources.framebuffer();
const targetTexture = type === 'fp16'
? resources.texture('image-float16', format, 'fp16', filter)
: type === 'float32'
? resources.texture('image-float32', format, 'float', filter)
: resources.texture('image-uint8', format, 'ubyte', filter);
// make a depth renderbuffer of the same size as the targetTexture
const depthRenderbuffer = !depth
? null
: isWebGL2(gl)
? resources.renderbuffer('depth32f', 'depth', _width, _height)
: resources.renderbuffer('depth16', 'depth', _width, _height);
function init() {
targetTexture.define(_width, _height);
targetTexture.attachFramebuffer(framebuffer, 'color0');
if (depthRenderbuffer)
depthRenderbuffer.attachFramebuffer(framebuffer);
}
init();
let destroyed = false;
return {
id: getNextRenderTargetId(),
texture: targetTexture,
framebuffer,
depthRenderbuffer,
getByteCount: () => targetTexture.getByteCount() + (depthRenderbuffer ? depthRenderbuffer.getByteCount() : 0),
getWidth: () => _width,
getHeight: () => _height,
bind: () => {
framebuffer.bind();
},
setSize: (width, height) => {
if (_width === width && _height === height) {
return;
}
_width = width;
_height = height;
targetTexture.define(_width, _height);
if (depthRenderbuffer)
depthRenderbuffer.setSize(_width, _height);
},
reset: () => {
init();
},
destroy: () => {
if (destroyed)
return;
targetTexture.destroy();
framebuffer.destroy();
if (depthRenderbuffer)
depthRenderbuffer.destroy();
destroyed = true;
}
};
}