我正在尝试读取纹理的RGBA值,但它不断返回以下错误,每个值都为0:
这是我的初始化代码,其中pixels是一个纹理值的数组:
WebGL: INVALID_OPERATION: readPixels: invalid format/type combination
这是我的初始化代码,其中pixels是一个纹理值的数组:
texture = gl.createTexture()
gl.activeTexture(gl.TEXTURE0)
gl.bindTexture(gl.TEXTURE_2D, texture)
gl.pixelStorei(gl.UNPACK_ALIGNMENT, 1)
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, n, n, 0,
gl.RGBA, gl.FLOAT, new Float32Array(pixels))
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
FBO = gl.createFramebuffer()
gl.bindFramebuffer(gl.FRAMEBUFFER, FBO)
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0,
gl.TEXTURE_2D, texture, 0)
然后,在单击事件中,我运行以下代码:
gl.bindFramebuffer(gl.FRAMEBUFFER, FBO);
var data = new Uint8Array(resolution * resolution * 4);
gl.readPixels(0, 0, resolution, resolution, gl.RGBA, gl.UNSIGNED_BYTE, data);
console.log(data)
数据返回了一个大的零数组。正确的格式和类型组合是什么,或者我在哪里出了问题?