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<!--
Copyright (c) 2023 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>gl.texImage2D() test to Wasm Memory 4GB in size.</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"> </script>
</head>
<body>
<canvas id="canvas" width="2" height="2" style="width: 40px; height: 40px;"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description(document.title);
debug("Tests that gl.texImage2D() can be called on WebAssembly Memory 4GB in size.");
debug("");
let wtu = WebGLTestUtils;
let gl = wtu.create3DContext("canvas", undefined, 2);
const PAGE = 65536;
const SIZE = 4*1024*1024*1024 - PAGE; // when uint32_t size is max, we can only reach one page short of full 4GB
let view = new Uint8Array(new WebAssembly.Memory({ 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;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
