我正在绘制<video>
到webgl画布上。我有它在铬和Firefox的工作,但IE11似乎是抛出一个错误。该错误提示:WebGL - drawElements:纹理是非功率纹理或不是mipmap完成
drawElements: The texture is a non-power-of-two texture or not mipmap complete
,指的是这个特定的行:
gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);
我有一个更新我的画布环运行。我读过这个错误可能是由于图像未准备好或加载而导致的。这是我的循环:
(function loop()
{
if (!$this.paused && !$this.ended)
{
gl.clear(gl.COLOR_BUFFER_BIT);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, tex);
if (!$this.paused && !$this.ended)
{
try
{
// update the video frame
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, player);
}
catch(e)
{
log(e);
}
}
gl.bindBuffer(gl.ARRAY_BUFFER, vx);
gl.vertexAttribPointer(vx_ptr, 2, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, ix);
gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);
window.requestAnimationFrame(loop);
}
})();
什么似乎是造成这种情况?我一直在寻找没有运气。我的循环运行,我安装了WebGL的帆布与此代码:之前
$scope.prepWebGL = function()
{
// prepare visible WebGL
vs = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(vs, "attribute vec2 vx;varying vec2 tx;void main(){gl_Position=vec4(vx.x*2.0-1.0,1.0-vx.y*2.0,0,1);tx=vx;}");
gl.compileShader(vs);
ps = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(ps, "precision mediump float;uniform sampler2D sm;varying vec2 tx;void main(){gl_FragColor=texture2D(sm,tx);}");
gl.compileShader(ps);
shader = gl.createProgram();
gl.attachShader(shader, vs);
gl.attachShader(shader, ps);
gl.linkProgram(shader);
gl.useProgram(shader);
vx_ptr = gl.getAttribLocation(shader, "vx");
gl.enableVertexAttribArray(vx_ptr);
gl.uniform1i(gl.getUniformLocation(shader, "sm"), 0);
vx = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vx);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([0,0, 1,0, 1,1, 0,1]), gl.STATIC_DRAW);
ix = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, ix);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array([0,1,2, 0,2,3]), gl.STATIC_DRAW);
tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
};
这不起作用遗憾 – Ronnie