| <!-- |
| Copyright (c) 2019 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>WebGL drawArrays Test</title> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/desktop-gl-constants.js"></script> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"> </script> |
| </head> |
| <body> |
| <canvas id="example" width="50" height="50"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script id="vshader" type="x-shader/x-vertex"> |
| attribute vec4 vPosition; |
| void main() |
| { |
| gl_Position = vPosition; |
| } |
| </script> |
| |
| <script id="fshader" type="x-shader/x-fragment"> |
| void main() |
| { |
| gl_FragColor = vec4(1.0,0.0,0.0,1.0); |
| } |
| </script> |
| |
| <script> |
| "use strict"; |
| function init() |
| { |
| description(document.title); |
| |
| function checkDrawArrays(mode, count, expect, msg) { |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| gl.drawArrays(mode, 0, count); |
| wtu.glErrorShouldBe(gl, expect, msg); |
| } |
| |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("example"); |
| var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]); |
| |
| var vertexObject = gl.createBuffer(); |
| gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); |
| gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW); |
| gl.enableVertexAttribArray(0); |
| |
| checkDrawArrays(gl.TRIANGLES, 3, |
| gl.INVALID_OPERATION, "gl.DrawArrays with no buffer attached to VAO should return INVALID_OPERATION"); |
| |
| gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); |
| |
| checkDrawArrays(gl.TRIANGLES, 3, |
| gl.NO_ERROR, "can call gl.DrawArrays with gl.TRIANGLES"); |
| |
| checkDrawArrays( |
| desktopGL['QUAD_STRIP'], 4, |
| gl.INVALID_ENUM, "gl.DrawArrays with QUAD_STRIP should return INVALID_ENUM"); |
| checkDrawArrays( |
| desktopGL['QUADS'], 4, |
| gl.INVALID_ENUM, "gl.DrawArrays with QUADS should return INVALID_ENUM"); |
| checkDrawArrays( |
| desktopGL['POLYGON'], 4, |
| gl.INVALID_ENUM, "gl.DrawArrays with POLYGON should return INVALID_ENUM"); |
| } |
| |
| init(); |
| var successfullyParsed = true; |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |