| <!-- |
| Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL texture2D GLSL conformance test.</title> |
| <link rel="stylesheet" href="../../../resources/js-test-style.css"/> |
| <link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/> |
| <script src="../../../resources/js-test-pre.js"></script> |
| <script src="../../resources/webgl-test.js"> </script> |
| <script src="../../resources/webgl-test-utils.js"> </script> |
| </head> |
| <body> |
| <canvas id="example" width="256" height="256" style="width: 16px; height: 16px;"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script id="vshader2d" type="x-shader/x-vertex"> |
| attribute vec4 vPosition; |
| attribute vec2 texCoord0; |
| varying vec4 color; |
| uniform sampler2D tex; |
| uniform float lod; |
| void main() { |
| gl_Position = vPosition; |
| color = texture2DLod(tex, texCoord0, lod); |
| } |
| </script> |
| <script id="fshader2d" type="x-shader/x-fragment"> |
| precision mediump float; |
| varying vec4 color; |
| void main() { |
| gl_FragData[0] = color; |
| } |
| </script> |
| <script> |
| description("tests GLSL texture2DLod function"); |
| |
| var wtu = WebGLTestUtils; |
| var canvas = document.getElementById("example"); |
| |
| shouldBe("canvas.width", "256"); |
| shouldBe("canvas.height", "256"); |
| |
| var colors = [ |
| {name: 'red', color:[255, 0, 0, 255]}, |
| {name: 'green', color:[0, 255, 0, 255]}, |
| {name: 'blue', color:[0, 0, 255, 255]}, |
| {name: 'yellow', color:[255, 255, 0, 255]}, |
| {name: 'magenta', color:[255, 0, 255, 255]}, |
| {name: 'cyan', color:[0, 255, 255, 255]}, |
| {name: 'pink', color:[255, 128, 128, 255]}, |
| {name: 'gray', color:[128, 128, 128, 255]}, |
| {name: 'light green', color:[128, 255, 128, 255]}, |
| ]; |
| |
| var gl = wtu.create3DContext(canvas); |
| if (gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS) > 0) { |
| runTest(); |
| } else { |
| testPassed("MAX_VERTEX_TEXTURE_IMAGE_UNITS == 0, this is okay."); |
| } |
| |
| function runTest() { |
| var program = wtu.setupProgram( |
| gl, ['vshader2d', 'fshader2d'], ['vPosition', 'texCoord0'], [0, 1]); |
| wtu.setupUnitQuad(gl, 0, 1); |
| |
| shouldBe("colors.length", "9"); |
| |
| var tex = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex); |
| gl.texParameteri( |
| gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST_MIPMAP_LINEAR); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT); |
| |
| for (var ii = 0; ii < colors.length; ++ii) { |
| var color = colors[ii]; |
| var size = Math.pow(2, colors.length - ii - 1); |
| wtu.fillTexture(gl, tex, size, size, color.color, ii); |
| } |
| |
| var loc = gl.getUniformLocation(program, "lod"); |
| |
| for (var ii = 0; ii < colors.length; ++ii) { |
| gl.uniform1f(loc, ii); |
| var color = colors[ii]; |
| wtu.drawQuad(gl); |
| wtu.checkCanvas( |
| gl, color.color, |
| "256x256 texture drawn to 256x256 dest with lod = " + ii + |
| " should be " + color.name); |
| } |
| glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors."); |
| } |
| |
| successfullyParsed = true; |
| |
| </script> |
| <script src="../../../resources/js-test-post.js"></script> |
| |
| </body> |
| </html> |
| |
| |
