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POWebGL - render depth to fbo texture does not work
 

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  1. POWebGL - render depth to fbo texture does not work
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    <p>For a post processing shader, I need the color and the depth buffer of my framebuffer. Accessing the colorbuffer works fine but I have problems creating the depthbuffer. I always get an INVALID_ENUM error when trying to use texImage2D for the depth texture:</p> <pre><code>WebGL error INVALID_ENUM in texImage2D(TEXTURE_2D, 0, DEPTH_COMPONENT16, 1536, 502, 0, DEPTH_COMPONENT, UNSIGNED_BYTE, null) </code></pre> <p>using a renderbuffer instead of a texture works but I want depth in a texture so I can pass it to a shader.</p> <p>framebuffer with depth texture code:</p> <pre><code>Framebuffer.prototype.initBufferStuffTexture = function(width, height){ if(this.width == width &amp;&amp; this.height == height){ return; } this.width = width; this.height = height; // remove existing buffers gl.bindFramebuffer(gl.FRAMEBUFFER, null); if(this.texture != null){ gl.deleteTexture(this.texture.glid); this.texture = null; } if(this.renderbuffer != null){ gl.deleteRenderbuffer(this.renderbuffer); this.renderbuffer = null; } if(this.framebuffer != null){ gl.deleteFramebuffer(this.framebuffer); this.framebuffer = null; } // create new buffers this.framebuffer = gl.createFramebuffer(); this.texture = new Texture(); this.texture.glid = gl.createTexture(); this.depth = new Texture(); this.depth.glid = gl.createTexture(); // framebuffer gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer); this.framebuffer.width = width; this.framebuffer.height = height; // colorbuffer gl.bindTexture(gl.TEXTURE_2D, this.texture.glid); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, this.framebuffer.width, this.framebuffer.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); // depthbuffer gl.bindTexture(gl.TEXTURE_2D, this.depth.glid); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); gl.texImage2D(gl.TEXTURE_2D, 0, gl.DEPTH_COMPONENT16, this.framebuffer.width, this.framebuffer.height, 0, gl.DEPTH_COMPONENT, gl.UNSIGNED_BYTE, null); // assemble buffers gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, this.texture.glid, 0); gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, this.depth.glid, 0); this.checkBuffer(); gl.bindTexture(gl.TEXTURE_2D, null); gl.bindRenderbuffer(gl.RENDERBUFFER, null); gl.bindFramebuffer(gl.FRAMEBUFFER, null); } </code></pre>
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