teximage2d-16gb-wasm-memory.html

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<title>gl.texImage2D() test to Wasm Memory 16GB in size.</title>

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<script src="../../js/webgl-test-utils.js"> </script>

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<script>

"use strict";

description(document.title);

debug("Tests that gl.texImage2D() can be called on WebAssembly Memory 16GB in size.");

debug("");

let wtu = WebGLTestUtils;

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

const PAGE = 65536;

const SIZE = 16*1024*1024*1024;

let view = new Uint8Array(new WebAssembly.Memory({ index: 'i64', initial: SIZE/PAGE }).buffer);

function compileShader(type, src) {

  let shader = gl.createShader(type);

  gl.shaderSource(shader, src);

  gl.compileShader(shader);

  let log = gl.getShaderInfoLog(shader);

  if (log) debug(log);

  return shader;

function createProgram(vs, fs) {

  let program = gl.createProgram();

  gl.attachShader(program, vs);

  gl.attachShader(program, fs);

  gl.bindAttribLocation(program, 0, 'pos');

  gl.linkProgram(program);

  gl.useProgram(program);

  return program;

let program = createProgram(

  compileShader(gl.VERTEX_SHADER, `

    varying vec2 uv;

    attribute vec2 pos;

    void main() { uv = pos; gl_Position = vec4(pos*2.0-vec2(1.0,1.0),0,1); }`),

  compileShader(gl.FRAGMENT_SHADER, `

    precision lowp float;

    uniform sampler2D tex;

    varying vec2 uv;

    void main() { gl_FragColor = texture2D(tex,uv); }`));

gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer());

gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([0, 0, 1, 0, 0, 1, 1, 1]), gl.STATIC_DRAW);

gl.vertexAttribPointer(0, 2, gl.FLOAT, gl.FALSE, 0, 0);

gl.enableVertexAttribArray(0);

let texture = gl.createTexture();

gl.bindTexture(gl.TEXTURE_2D, texture);

// Test uploading an image

const expectedColor = [42, 84, 128, 255];

const offset = SIZE - 4;

view.set(expectedColor, offset);

gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, view, offset);

wtu.glErrorShouldBe(gl, gl.NO_ERROR);

// Test rendering with that image

gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);

// Verify that we rendered what we expected

wtu.checkCanvasRect(gl, 0, 0, 1, 1, expectedColor, "texImage2D produced expected color");

var successfullyParsed = true;

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