原生平台拷贝Texture纹理数据

Creator 2.x
#1

  • Creator 版本： 2.4.10

  • 目标平台：原生，window/android

  • 重现方式：该函数传入对应参数

  • 重现概率： 100

想读取纹理对应区域的像素数据

let _rt: cc.RenderTexture;
const data = new Uint8Array(2048 * 2048 * 4);
function readData1(texture, sx: number, sy: number, sw: number, sh: number): Uint8ClampedArray | Uint8Array {
    let rt: any = _rt;
    if (!rt) {
        rt = _rt = new RenderTexture();
        _rt.initWithSize(2048, 2048, RenderTexture.DepthStencilFormat.RB_FMT_S8);
    }

    let gl = cc.game._renderContext;
    let oldFBO = gl.getParameter(gl.FRAMEBUFFER_BINDING);
    gl.bindFramebuffer(gl.FRAMEBUFFER, rt._framebuffer.getHandle());


        //@ts-ignore
        let glID, id, _texture = texture._texture;
        if (CC_JSB) {
            glID = _texture.getHandle();
            id = _texture._id;
            _texture._id = glID;
            glID = _texture;
        } else {
            glID = _texture._glID
        }
        gl.framebufferTexture2D(
            gl.FRAMEBUFFER,
            gl.COLOR_ATTACHMENT0,
            gl.TEXTURE_2D,
            glID,
            0
        );
        if (CC_JSB) {
            _texture._id = id;
        }

    gl.readPixels(sx, sy, sw, sh, gl.RGBA, gl.UNSIGNED_BYTE, data);
    gl.bindFramebuffer(gl.FRAMEBUFFER, oldFBO);
    return data;
}

web正常，原生能正常读取，但是原来纹理的数据会出现被覆盖的情况。有了解情况的吗？

2赞
#2

解决了，原生平台需要使用来替换fbo

    //@ts-ignore
    const device = cc.renderer.device;
    device.setFrameBuffer(rt._framebuffer);
#3

好人啊，代码我收着备用 :grinning:

#4

mark~~

#5

mark yes