| <!-- |
| 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 Multi-Context Sampler Test</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_drawing" width="12" height="12"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| description("Tests that samplers' state doesn't leak across contexts"); |
| debug(""); |
| debug('Regression test for <a href="http://crbug.com/713127">http://crbug.com/713127</a>'); |
| |
| function runTest() { |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("canvas_drawing", undefined, 2); |
| var texture = null; |
| var color = [0, 255, 0, 255]; |
| |
| if (!gl) { |
| testFailed("WebGL context does not exist"); |
| return; |
| } |
| |
| testPassed("WebGL context exists"); |
| |
| wtu.setupTexturedQuad(gl); |
| texture = gl.createTexture(); |
| // Create a texture bigger than 1x1 so that it would need mipmaps in |
| // order to be complete. |
| wtu.fillTexture(gl, texture, 2, 2, color, 0, |
| gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA8); |
| // Set texture parameters so that this texture is complete. |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| |
| // Set up a secondary context with a sampler bound to texture unit |
| // 0. This should not interfere with the primary context. |
| var altGL = wtu.create3DContext(undefined, undefined, 2); |
| if (!altGL) { |
| testFailed("Error creating secondary WebGL context"); |
| return; |
| } |
| |
| var sampler = altGL.createSampler(); |
| // Note that the sampler's default TEXTURE_MIN_FILTER is |
| // NEAREST_MIPMAP_LINEAR. |
| altGL.bindSampler(0, sampler); |
| altGL.clearColor(1, 0, 0, 1); |
| altGL.clear(altGL.COLOR_BUFFER_BIT); |
| wtu.checkCanvasRect(altGL, 0, 0, 1, 1, [ 255, 0, 0, 255 ], |
| "should be red"); |
| |
| // Now switch back to the main context and draw the texture. |
| gl.clearColor(1, 1, 1, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| wtu.drawUnitQuad(gl); |
| // The presence of the sampler on the other context should not |
| // have interfered with the completeness of the texture. |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, color, |
| "should be green"); |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors"); |
| } |
| |
| runTest(); |
| var successfullyParsed = true; |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |
