framebuffer-texture-level1.html

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<title>WebGL framebuffer using texture level 1</title>

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<canvas id="canvas" width="2" height="2"> </canvas>

<script>

"use strict";

var wtu = WebGLTestUtils;

var gl;

function testFramebufferTextureWithNonZeroBaseLevel(level) {

  if (level < 1) {

    throw "This test is incorrect if level < 1";

  var width = 32;

  var height = 16;

  var texture = gl.createTexture();

  gl.bindTexture(gl.TEXTURE_2D, texture);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_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, level, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);

  var fbo = gl.createFramebuffer();

  gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);

  gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, level);

  shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT");

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_BASE_LEVEL, level);

  shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");

  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Setup framebuffer with texture should succeed.");

  gl.deleteTexture(texture);

  gl.deleteFramebuffer(fbo);

description("Test fbo completeness when using non level 0 texture images");

var canvas = document.getElementById("canvas");

shouldBeNonNull("gl = wtu.create3DContext(canvas, undefined, 2)");

testFramebufferTextureWithNonZeroBaseLevel(1);

debug("");

var successfullyParsed = true;

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